feat(StealthAdapter): fix stealth features for Playwright integration. ref #1481

Fix/proxy deprecation

.gitignore

@@ -265,7 +265,7 @@ CLAUDE.md
 tests/**/test_site
 tests/**/reports
 tests/**/benchmark_reports
-
+test_scripts/
 docs/**/data
 .codecat/
 

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to Crawl4AI will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+- **🔒 HTTPS Preservation for Internal Links**: New `preserve_https_for_internal_links` configuration flag
+  - Maintains HTTPS scheme for internal links even when servers redirect to HTTP
+  - Prevents security downgrades during deep crawling
+  - Useful for security-conscious crawling and sites supporting both protocols
+  - Fully backward compatible with opt-in flag (default: `False`)
+  - Fixes issue #1410 where HTTPS URLs were being downgraded to HTTP
+
 ## [0.7.3] - 2025-08-09
 
 ### Added

crawl4ai/adaptive_crawler.py

@@ -19,7 +19,7 @@ import re
 from pathlib import Path
 
 from crawl4ai.async_webcrawler import AsyncWebCrawler
-from crawl4ai.async_configs import CrawlerRunConfig, LinkPreviewConfig
+from crawl4ai.async_configs import CrawlerRunConfig, LinkPreviewConfig, LLMConfig
 from crawl4ai.models import Link, CrawlResult
 import numpy as np
 
@@ -178,7 +178,7 @@ class AdaptiveConfig:
     
     # Embedding strategy parameters
     embedding_model: str = "sentence-transformers/all-MiniLM-L6-v2"
-    embedding_llm_config: Optional[Dict] = None  # Separate config for embeddings
+    embedding_llm_config: Optional[Union[LLMConfig, Dict]] = None  # Separate config for embeddings
     n_query_variations: int = 10
     coverage_threshold: float = 0.85
     alpha_shape_alpha: float = 0.5
@@ -250,6 +250,30 @@ class AdaptiveConfig:
         assert 0 <= self.embedding_quality_max_confidence <= 1, "embedding_quality_max_confidence must be between 0 and 1"
         assert self.embedding_quality_scale_factor > 0, "embedding_quality_scale_factor must be positive"
         assert 0 <= self.embedding_min_confidence_threshold <= 1, "embedding_min_confidence_threshold must be between 0 and 1"
+    
+    @property
+    def _embedding_llm_config_dict(self) -> Optional[Dict]:
+        """Convert LLMConfig to dict format for backward compatibility."""
+        if self.embedding_llm_config is None:
+            return None
+        
+        if isinstance(self.embedding_llm_config, dict):
+            # Already a dict - return as-is for backward compatibility
+            return self.embedding_llm_config
+        
+        # Convert LLMConfig object to dict format
+        return {
+            'provider': self.embedding_llm_config.provider,
+            'api_token': self.embedding_llm_config.api_token,
+            'base_url': getattr(self.embedding_llm_config, 'base_url', None),
+            'temperature': getattr(self.embedding_llm_config, 'temperature', None),
+            'max_tokens': getattr(self.embedding_llm_config, 'max_tokens', None),
+            'top_p': getattr(self.embedding_llm_config, 'top_p', None),
+            'frequency_penalty': getattr(self.embedding_llm_config, 'frequency_penalty', None),
+            'presence_penalty': getattr(self.embedding_llm_config, 'presence_penalty', None),
+            'stop': getattr(self.embedding_llm_config, 'stop', None),
+            'n': getattr(self.embedding_llm_config, 'n', None),
+        }
 
 
 class CrawlStrategy(ABC):
@@ -593,7 +617,7 @@ class StatisticalStrategy(CrawlStrategy):
 class EmbeddingStrategy(CrawlStrategy):
     """Embedding-based adaptive crawling using semantic space coverage"""
     
-    def __init__(self, embedding_model: str = None, llm_config: Dict = None):
+    def __init__(self, embedding_model: str = None, llm_config: Union[LLMConfig, Dict] = None):
         self.embedding_model = embedding_model or "sentence-transformers/all-MiniLM-L6-v2"
         self.llm_config = llm_config
         self._embedding_cache = {}
@@ -605,14 +629,24 @@ class EmbeddingStrategy(CrawlStrategy):
         self._kb_embeddings_hash = None  # Track KB changes
         self._validation_embeddings_cache = None  # Cache validation query embeddings
         self._kb_similarity_threshold = 0.95  # Threshold for deduplication
+    
+    def _get_embedding_llm_config_dict(self) -> Dict:
+        """Get embedding LLM config as dict with fallback to default."""
+        if hasattr(self, 'config') and self.config:
+            config_dict = self.config._embedding_llm_config_dict
+            if config_dict:
+                return config_dict
+        
+        # Fallback to default if no config provided
+        return {
+            'provider': 'openai/text-embedding-3-small',
+            'api_token': os.getenv('OPENAI_API_KEY')
+        }
         
     async def _get_embeddings(self, texts: List[str]) -> Any:
         """Get embeddings using configured method"""
         from .utils import get_text_embeddings
-        embedding_llm_config = {
-            'provider': 'openai/text-embedding-3-small',
-            'api_token': os.getenv('OPENAI_API_KEY')
-        }
+        embedding_llm_config = self._get_embedding_llm_config_dict()
         return await get_text_embeddings(
             texts, 
             embedding_llm_config,
@@ -679,8 +713,20 @@ class EmbeddingStrategy(CrawlStrategy):
         Return as a JSON array of strings."""
         
         # Use the LLM for query generation
-        provider = self.llm_config.get('provider', 'openai/gpt-4o-mini') if self.llm_config else 'openai/gpt-4o-mini'
-        api_token = self.llm_config.get('api_token') if self.llm_config else None
+        # Convert LLMConfig to dict if needed
+        llm_config_dict = None
+        if self.llm_config:
+            if isinstance(self.llm_config, dict):
+                llm_config_dict = self.llm_config
+            else:
+                # Convert LLMConfig object to dict
+                llm_config_dict = {
+                    'provider': self.llm_config.provider,
+                    'api_token': self.llm_config.api_token
+                }
+        
+        provider = llm_config_dict.get('provider', 'openai/gpt-4o-mini') if llm_config_dict else 'openai/gpt-4o-mini'
+        api_token = llm_config_dict.get('api_token') if llm_config_dict else None
         
         # response = perform_completion_with_backoff(
         #     provider=provider,
@@ -843,10 +889,7 @@ class EmbeddingStrategy(CrawlStrategy):
         
         # Batch embed only uncached links
         if texts_to_embed:
-            embedding_llm_config = {
-                'provider': 'openai/text-embedding-3-small',
-                'api_token': os.getenv('OPENAI_API_KEY')
-            }
+            embedding_llm_config = self._get_embedding_llm_config_dict()
             new_embeddings = await get_text_embeddings(texts_to_embed, embedding_llm_config, self.embedding_model)
 
             # Cache the new embeddings
@@ -1184,10 +1227,7 @@ class EmbeddingStrategy(CrawlStrategy):
             return
             
         # Get embeddings for new texts
-        embedding_llm_config = {
-            'provider': 'openai/text-embedding-3-small',
-            'api_token': os.getenv('OPENAI_API_KEY')
-        }        
+        embedding_llm_config = self._get_embedding_llm_config_dict()      
         new_embeddings = await get_text_embeddings(new_texts, embedding_llm_config, self.embedding_model)
 
         # Deduplicate embeddings before adding to KB
@@ -1256,10 +1296,12 @@ class AdaptiveCrawler:
         if strategy_name == "statistical":
             return StatisticalStrategy()
         elif strategy_name == "embedding":
-            return EmbeddingStrategy(
+            strategy = EmbeddingStrategy(
                 embedding_model=self.config.embedding_model,
                 llm_config=self.config.embedding_llm_config
             )
+            strategy.config = self.config  # Pass config to strategy
+            return strategy
         else:
             raise ValueError(f"Unknown strategy: {strategy_name}")
     

crawl4ai/async_configs.py

@@ -1,5 +1,6 @@
 import os
 from typing import Union
+import warnings
 from .config import (
     DEFAULT_PROVIDER,
     DEFAULT_PROVIDER_API_KEY,
@@ -257,24 +258,39 @@ class ProxyConfig:
     
     @staticmethod
     def from_string(proxy_str: str) -> "ProxyConfig":
-        """Create a ProxyConfig from a string in the format 'ip:port:username:password'."""
-        parts = proxy_str.split(":")
-        if len(parts) == 4:  # ip:port:username:password
+        """Create a ProxyConfig from a string.
+
+        Supported formats:
+        - 'http://username:password@ip:port'
+        - 'http://ip:port'
+        - 'socks5://ip:port'
+        - 'ip:port:username:password'
+        - 'ip:port'
+        """
+        s = (proxy_str or "").strip()
+        # URL with credentials
+        if "@" in s and "://" in s:
+            auth_part, server_part = s.split("@", 1)
+            protocol, credentials = auth_part.split("://", 1)
+            if ":" in credentials:
+                username, password = credentials.split(":", 1)
+                return ProxyConfig(
+                    server=f"{protocol}://{server_part}",
+                    username=username,
+                    password=password,
+                )
+        # URL without credentials (keep scheme)
+        if "://" in s and "@" not in s:
+            return ProxyConfig(server=s)
+        # Colon separated forms
+        parts = s.split(":")
+        if len(parts) == 4:
             ip, port, username, password = parts
-            return ProxyConfig(
-                server=f"http://{ip}:{port}",
-                username=username,
-                password=password,
-                ip=ip
-            )
-        elif len(parts) == 2:  # ip:port only
+            return ProxyConfig(server=f"http://{ip}:{port}", username=username, password=password)
+        if len(parts) == 2:
             ip, port = parts
-            return ProxyConfig(
-                server=f"http://{ip}:{port}",
-                ip=ip
-            )
-        else:
-            raise ValueError(f"Invalid proxy string format: {proxy_str}")
+            return ProxyConfig(server=f"http://{ip}:{port}")
+        raise ValueError(f"Invalid proxy string format: {proxy_str}")
     
     @staticmethod
     def from_dict(proxy_dict: Dict) -> "ProxyConfig":
@@ -438,6 +454,7 @@ class BrowserConfig:
         host: str = "localhost",
         enable_stealth: bool = False,
     ):
+        
         self.browser_type = browser_type
         self.headless = headless 
         self.browser_mode = browser_mode
@@ -450,13 +467,22 @@ class BrowserConfig:
         if self.browser_type in ["firefox", "webkit"]:
             self.channel = ""
             self.chrome_channel = ""
+        if proxy:
+            warnings.warn("The 'proxy' parameter is deprecated and will be removed in a future release. Use 'proxy_config' instead.", UserWarning)
         self.proxy = proxy
         self.proxy_config = proxy_config
         if isinstance(self.proxy_config, dict):
             self.proxy_config = ProxyConfig.from_dict(self.proxy_config)
         if isinstance(self.proxy_config, str):
             self.proxy_config = ProxyConfig.from_string(self.proxy_config)
-
+        
+        if self.proxy and self.proxy_config:
+            warnings.warn("Both 'proxy' and 'proxy_config' are provided. 'proxy_config' will take precedence.", UserWarning)
+            self.proxy = None
+        elif self.proxy:
+            # Convert proxy string to ProxyConfig if proxy_config is not provided
+            self.proxy_config = ProxyConfig.from_string(self.proxy)
+            self.proxy = None
 
         self.viewport_width = viewport_width
         self.viewport_height = viewport_height
@@ -834,12 +860,6 @@ class HTTPCrawlerConfig:
         return HTTPCrawlerConfig.from_kwargs(config)
 
 class CrawlerRunConfig():
-    _UNWANTED_PROPS = {
-        'disable_cache' : 'Instead, use cache_mode=CacheMode.DISABLED',
-        'bypass_cache' : 'Instead, use cache_mode=CacheMode.BYPASS',
-        'no_cache_read' : 'Instead, use cache_mode=CacheMode.WRITE_ONLY',
-        'no_cache_write' : 'Instead, use cache_mode=CacheMode.READ_ONLY',
-    }
 
     """
     Configuration class for controlling how the crawler runs each crawl operation.
@@ -1046,6 +1066,12 @@ class CrawlerRunConfig():
 
         url: str = None  # This is not a compulsory parameter
     """
+    _UNWANTED_PROPS = {
+        'disable_cache' : 'Instead, use cache_mode=CacheMode.DISABLED',
+        'bypass_cache' : 'Instead, use cache_mode=CacheMode.BYPASS',
+        'no_cache_read' : 'Instead, use cache_mode=CacheMode.WRITE_ONLY',
+        'no_cache_write' : 'Instead, use cache_mode=CacheMode.READ_ONLY',
+    }
 
     def __init__(
         self,
@@ -1124,6 +1150,7 @@ class CrawlerRunConfig():
         exclude_domains: list = None,
         exclude_internal_links: bool = False,
         score_links: bool = False,
+        preserve_https_for_internal_links: bool = False,
         # Debugging and Logging Parameters
         verbose: bool = True,
         log_console: bool = False,
@@ -1247,6 +1274,7 @@ class CrawlerRunConfig():
         self.exclude_domains = exclude_domains or []
         self.exclude_internal_links = exclude_internal_links
         self.score_links = score_links
+        self.preserve_https_for_internal_links = preserve_https_for_internal_links
 
         # Debugging and Logging Parameters
         self.verbose = verbose
@@ -1520,6 +1548,7 @@ class CrawlerRunConfig():
             exclude_domains=kwargs.get("exclude_domains", []),
             exclude_internal_links=kwargs.get("exclude_internal_links", False),
             score_links=kwargs.get("score_links", False),
+            preserve_https_for_internal_links=kwargs.get("preserve_https_for_internal_links", False),
             # Debugging and Logging Parameters
             verbose=kwargs.get("verbose", True),
             log_console=kwargs.get("log_console", False),
@@ -1626,6 +1655,7 @@ class CrawlerRunConfig():
             "exclude_domains": self.exclude_domains,
             "exclude_internal_links": self.exclude_internal_links,
             "score_links": self.score_links,
+            "preserve_https_for_internal_links": self.preserve_https_for_internal_links,
             "verbose": self.verbose,
             "log_console": self.log_console,
             "capture_network_requests": self.capture_network_requests,

crawl4ai/async_webcrawler.py

@@ -354,6 +354,7 @@ class AsyncWebCrawler:
                     ###############################################################
                     # Process the HTML content, Call CrawlerStrategy.process_html #
                     ###############################################################
+                    from urllib.parse import urlparse
                     crawl_result: CrawlResult = await self.aprocess_html(
                         url=url,
                         html=html,
@@ -364,6 +365,7 @@ class AsyncWebCrawler:
                         verbose=config.verbose,
                         is_raw_html=True if url.startswith("raw:") else False,
                         redirected_url=async_response.redirected_url,
+                        original_scheme=urlparse(url).scheme,
                         **kwargs,
                     )
 

crawl4ai/browser_adapter.py

@@ -148,6 +148,134 @@ class PlaywrightAdapter(BrowserAdapter):
         return Page, Error, PlaywrightTimeoutError
 
 
+class StealthAdapter(BrowserAdapter):
+    """Adapter for Playwright with stealth features using playwright_stealth"""
+
+    def __init__(self):
+        self._console_script_injected = {}
+        self._stealth_available = self._check_stealth_availability()
+
+    def _check_stealth_availability(self) -> bool:
+        """Check if playwright_stealth is available and get the correct function"""
+        try:
+            from playwright_stealth import stealth_async
+            self._stealth_function = stealth_async
+            return True
+        except ImportError:
+            try:
+                from playwright_stealth import stealth_sync
+                self._stealth_function = stealth_sync
+                return True
+            except ImportError:
+                self._stealth_function = None
+                return False
+
+    async def apply_stealth(self, page: Page):
+        """Apply stealth to a page if available"""
+        if self._stealth_available and self._stealth_function:
+            try:
+                if hasattr(self._stealth_function, '__call__'):
+                    if 'async' in getattr(self._stealth_function, '__name__', ''):
+                        await self._stealth_function(page)
+                    else:
+                        self._stealth_function(page)
+            except Exception as e:
+                # Fail silently or log error depending on requirements
+                pass
+
+    async def evaluate(self, page: Page, expression: str, arg: Any = None) -> Any:
+        """Standard Playwright evaluate with stealth applied"""
+        if arg is not None:
+            return await page.evaluate(expression, arg)
+        return await page.evaluate(expression)
+
+    async def setup_console_capture(self, page: Page, captured_console: List[Dict]) -> Optional[Callable]:
+        """Setup console capture using Playwright's event system with stealth"""
+        # Apply stealth to the page first
+        await self.apply_stealth(page)
+
+        def handle_console_capture(msg):
+            try:
+                message_type = "unknown"
+                try:
+                    message_type = msg.type
+                except:
+                    pass
+
+                message_text = "unknown"
+                try:
+                    message_text = msg.text
+                except:
+                    pass
+
+                entry = {
+                    "type": message_type,
+                    "text": message_text,
+                    "timestamp": time.time()
+                }
+
+                captured_console.append(entry)
+
+            except Exception as e:
+                captured_console.append({
+                    "type": "console_capture_error",
+                    "error": str(e),
+                    "timestamp": time.time()
+                })
+
+        page.on("console", handle_console_capture)
+        return handle_console_capture
+
+    async def setup_error_capture(self, page: Page, captured_console: List[Dict]) -> Optional[Callable]:
+        """Setup error capture using Playwright's event system"""
+        def handle_pageerror_capture(err):
+            try:
+                error_message = "Unknown error"
+                try:
+                    error_message = err.message
+                except:
+                    pass
+
+                error_stack = ""
+                try:
+                    error_stack = err.stack
+                except:
+                    pass
+
+                captured_console.append({
+                    "type": "error",
+                    "text": error_message,
+                    "stack": error_stack,
+                    "timestamp": time.time()
+                })
+            except Exception as e:
+                captured_console.append({
+                    "type": "pageerror_capture_error",
+                    "error": str(e),
+                    "timestamp": time.time()
+                })
+
+        page.on("pageerror", handle_pageerror_capture)
+        return handle_pageerror_capture
+
+    async def retrieve_console_messages(self, page: Page) -> List[Dict]:
+        """Not needed for Playwright - messages are captured via events"""
+        return []
+
+    async def cleanup_console_capture(self, page: Page, handle_console: Optional[Callable], handle_error: Optional[Callable]):
+        """Remove event listeners"""
+        if handle_console:
+            page.remove_listener("console", handle_console)
+        if handle_error:
+            page.remove_listener("pageerror", handle_error)
+
+    def get_imports(self) -> tuple:
+        """Return Playwright imports"""
+        from playwright.async_api import Page, Error
+        from playwright.async_api import TimeoutError as PlaywrightTimeoutError
+        return Page, Error, PlaywrightTimeoutError
+
+
 class UndetectedAdapter(BrowserAdapter):
     """Adapter for undetected browser automation with stealth features"""
     

crawl4ai/browser_manager.py

@@ -15,6 +15,7 @@ from .js_snippet import load_js_script
 from .config import DOWNLOAD_PAGE_TIMEOUT
 from .async_configs import BrowserConfig, CrawlerRunConfig
 from .utils import get_chromium_path
+import warnings
 
 
 BROWSER_DISABLE_OPTIONS = [
@@ -613,9 +614,11 @@ class BrowserManager:
         # for all racers). Prevents 'Target page/context closed' errors.
         self._page_lock = asyncio.Lock()
         
-        # Stealth-related attributes
-        self._stealth_instance = None
-        self._stealth_cm = None 
+        # Stealth adapter for stealth mode
+        self._stealth_adapter = None
+        if self.config.enable_stealth and not self.use_undetected:
+            from .browser_adapter import StealthAdapter
+            self._stealth_adapter = StealthAdapter()
 
         # Initialize ManagedBrowser if needed
         if self.config.use_managed_browser:
@@ -649,16 +652,8 @@ class BrowserManager:
         else:
             from playwright.async_api import async_playwright
 
-        # Initialize playwright with or without stealth
-        if self.config.enable_stealth and not self.use_undetected:
-            # Import stealth only when needed
-            from playwright_stealth import Stealth
-            # Use the recommended stealth wrapper approach
-            self._stealth_instance = Stealth()
-            self._stealth_cm = self._stealth_instance.use_async(async_playwright())
-            self.playwright = await self._stealth_cm.__aenter__()
-        else:
-            self.playwright = await async_playwright().start()
+        # Initialize playwright
+        self.playwright = await async_playwright().start()
 
         if self.config.cdp_url or self.config.use_managed_browser:
             self.config.use_managed_browser = True
@@ -741,17 +736,18 @@ class BrowserManager:
             )
             os.makedirs(browser_args["downloads_path"], exist_ok=True)
 
-        if self.config.proxy or self.config.proxy_config:
+        if self.config.proxy:
+            warnings.warn(
+                "BrowserConfig.proxy is deprecated and ignored. Use proxy_config instead.",
+                DeprecationWarning,
+            )
+        if self.config.proxy_config:
             from playwright.async_api import ProxySettings
 
-            proxy_settings = (
-                ProxySettings(server=self.config.proxy)
-                if self.config.proxy
-                else ProxySettings(
-                    server=self.config.proxy_config.server,
-                    username=self.config.proxy_config.username,
-                    password=self.config.proxy_config.password,
-                )
+            proxy_settings = ProxySettings(
+                server=self.config.proxy_config.server,
+                username=self.config.proxy_config.username,
+                password=self.config.proxy_config.password,
             )
             browser_args["proxy"] = proxy_settings
 
@@ -1007,6 +1003,19 @@ class BrowserManager:
         signature_hash = hashlib.sha256(signature_json.encode("utf-8")).hexdigest()
         return signature_hash
 
+    async def _apply_stealth_to_page(self, page):
+        """Apply stealth to a page if stealth mode is enabled"""
+        if self._stealth_adapter:
+            try:
+                await self._stealth_adapter.apply_stealth(page)
+            except Exception as e:
+                if self.logger:
+                    self.logger.warning(
+                        message="Failed to apply stealth to page: {error}",
+                        tag="STEALTH",
+                        params={"error": str(e)}
+                    )
+
     async def get_page(self, crawlerRunConfig: CrawlerRunConfig):
         """
         Get a page for the given session ID, creating a new one if needed.
@@ -1036,6 +1045,7 @@ class BrowserManager:
                 # See GH-1198: context.pages can be empty under races
                 async with self._page_lock:
                     page = await ctx.new_page()
+                await self._apply_stealth_to_page(page)
             else:
                 context = self.default_context
                 pages = context.pages
@@ -1052,6 +1062,7 @@ class BrowserManager:
                                 page = pages[0]
                             else:
                                 page = await context.new_page()
+                                await self._apply_stealth_to_page(page)
         else:
             # Otherwise, check if we have an existing context for this config
             config_signature = self._make_config_signature(crawlerRunConfig)
@@ -1067,6 +1078,7 @@ class BrowserManager:
 
             # Create a new page from the chosen context
             page = await context.new_page()
+            await self._apply_stealth_to_page(page)
 
         # If a session_id is specified, store this session so we can reuse later
         if crawlerRunConfig.session_id:
@@ -1133,19 +1145,5 @@ class BrowserManager:
             self.managed_browser = None
 
         if self.playwright:
-            # Handle stealth context manager cleanup if it exists
-            if hasattr(self, '_stealth_cm') and self._stealth_cm is not None:
-                try:
-                    await self._stealth_cm.__aexit__(None, None, None)
-                except Exception as e:
-                    if self.logger:
-                        self.logger.error(
-                            message="Error closing stealth context: {error}",
-                            tag="ERROR", 
-                            params={"error": str(e)}
-                        )
-                self._stealth_cm = None
-                self._stealth_instance = None
-            else:
-                await self.playwright.stop()
+            await self.playwright.stop()
             self.playwright = None

crawl4ai/content_scraping_strategy.py

@@ -258,7 +258,11 @@ class LXMLWebScrapingStrategy(ContentScrapingStrategy):
                 continue
 
             try:
-                normalized_href = normalize_url(href, url)
+                normalized_href = normalize_url(
+                    href, url,
+                    preserve_https=kwargs.get('preserve_https_for_internal_links', False),
+                    original_scheme=kwargs.get('original_scheme')
+                )
                 link_data = {
                     "href": normalized_href,
                     "text": link.text_content().strip(),

crawl4ai/deep_crawling/bff_strategy.py

@@ -122,11 +122,6 @@ class BestFirstCrawlingStrategy(DeepCrawlStrategy):
                 
             valid_links.append(base_url)
             
-        # If we have more valid links than capacity, limit them
-        if len(valid_links) > remaining_capacity:
-            valid_links = valid_links[:remaining_capacity]
-            self.logger.info(f"Limiting to {remaining_capacity} URLs due to max_pages limit")
-            
         # Record the new depths and add to next_links
         for url in valid_links:
             depths[url] = new_depth
@@ -146,7 +141,8 @@ class BestFirstCrawlingStrategy(DeepCrawlStrategy):
         """
         queue: asyncio.PriorityQueue = asyncio.PriorityQueue()
         # Push the initial URL with score 0 and depth 0.
-        await queue.put((0, 0, start_url, None))
+        initial_score = self.url_scorer.score(start_url) if self.url_scorer else 0
+        await queue.put((-initial_score, 0, start_url, None))
         visited: Set[str] = set()
         depths: Dict[str, int] = {start_url: 0}
 
@@ -193,7 +189,7 @@ class BestFirstCrawlingStrategy(DeepCrawlStrategy):
                 result.metadata = result.metadata or {}
                 result.metadata["depth"] = depth
                 result.metadata["parent_url"] = parent_url
-                result.metadata["score"] = score
+                result.metadata["score"] = -score
                 
                 # Count only successful crawls toward max_pages limit
                 if result.success:
@@ -214,7 +210,7 @@ class BestFirstCrawlingStrategy(DeepCrawlStrategy):
                     for new_url, new_parent in new_links:
                         new_depth = depths.get(new_url, depth + 1)
                         new_score = self.url_scorer.score(new_url) if self.url_scorer else 0
-                        await queue.put((new_score, new_depth, new_url, new_parent))
+                        await queue.put((-new_score, new_depth, new_url, new_parent))
 
         # End of crawl.
 

crawl4ai/utils.py

@@ -1790,6 +1790,10 @@ def perform_completion_with_backoff(
         except RateLimitError as e:
             print("Rate limit error:", str(e))
 
+            if attempt == max_attempts - 1:
+                # Last attempt failed, raise the error.
+                raise
+
             # Check if we have exhausted our max attempts
             if attempt < max_attempts - 1:
                 # Calculate the delay and wait
@@ -2146,7 +2150,9 @@ def normalize_url(
     drop_query_tracking=True,
     sort_query=True,
     keep_fragment=False,
-    extra_drop_params=None
+    extra_drop_params=None,
+    preserve_https=False,
+    original_scheme=None
 ):
     """
     Extended URL normalizer
@@ -2176,6 +2182,17 @@ def normalize_url(
 
     # Resolve relative paths first
     full_url = urljoin(base_url, href.strip())
+    
+    # Preserve HTTPS if requested and original scheme was HTTPS
+    if preserve_https and original_scheme == 'https':
+        parsed_full = urlparse(full_url)
+        parsed_base = urlparse(base_url)
+        # Only preserve HTTPS for same-domain links (not protocol-relative URLs)
+        # Protocol-relative URLs (//example.com) should follow the base URL's scheme
+        if (parsed_full.scheme == 'http' and 
+            parsed_full.netloc == parsed_base.netloc and
+            not href.strip().startswith('//')):
+            full_url = full_url.replace('http://', 'https://', 1)
 
     # Parse once, edit parts, then rebuild
     parsed = urlparse(full_url)
@@ -2227,7 +2244,7 @@ def normalize_url(
     return normalized
 
 
-def normalize_url_for_deep_crawl(href, base_url):
+def normalize_url_for_deep_crawl(href, base_url, preserve_https=False, original_scheme=None):
     """Normalize URLs to ensure consistent format"""
     from urllib.parse import urljoin, urlparse, urlunparse, parse_qs, urlencode
 
@@ -2238,6 +2255,17 @@ def normalize_url_for_deep_crawl(href, base_url):
     # Use urljoin to handle relative URLs
     full_url = urljoin(base_url, href.strip())
     
+    # Preserve HTTPS if requested and original scheme was HTTPS
+    if preserve_https and original_scheme == 'https':
+        parsed_full = urlparse(full_url)
+        parsed_base = urlparse(base_url)
+        # Only preserve HTTPS for same-domain links (not protocol-relative URLs)
+        # Protocol-relative URLs (//example.com) should follow the base URL's scheme
+        if (parsed_full.scheme == 'http' and 
+            parsed_full.netloc == parsed_base.netloc and
+            not href.strip().startswith('//')):
+            full_url = full_url.replace('http://', 'https://', 1)
+    
     # Parse the URL for normalization
     parsed = urlparse(full_url)
     
@@ -2275,7 +2303,7 @@ def normalize_url_for_deep_crawl(href, base_url):
     return normalized
 
 @lru_cache(maxsize=10000)
-def efficient_normalize_url_for_deep_crawl(href, base_url):
+def efficient_normalize_url_for_deep_crawl(href, base_url, preserve_https=False, original_scheme=None):
     """Efficient URL normalization with proper parsing"""
     from urllib.parse import urljoin
     
@@ -2285,6 +2313,17 @@ def efficient_normalize_url_for_deep_crawl(href, base_url):
     # Resolve relative URLs
     full_url = urljoin(base_url, href.strip())
     
+    # Preserve HTTPS if requested and original scheme was HTTPS
+    if preserve_https and original_scheme == 'https':
+        parsed_full = urlparse(full_url)
+        parsed_base = urlparse(base_url)
+        # Only preserve HTTPS for same-domain links (not protocol-relative URLs)
+        # Protocol-relative URLs (//example.com) should follow the base URL's scheme
+        if (parsed_full.scheme == 'http' and 
+            parsed_full.netloc == parsed_base.netloc and
+            not href.strip().startswith('//')):
+            full_url = full_url.replace('http://', 'https://', 1)
+    
     # Use proper URL parsing
     parsed = urlparse(full_url)
     

deploy/docker/api.py

@@ -413,6 +413,9 @@ async def stream_results(crawler: AsyncWebCrawler, results_gen: AsyncGenerator)
                 server_memory_mb = _get_memory_mb()
                 result_dict = result.model_dump()
                 result_dict['server_memory_mb'] = server_memory_mb
+                # Ensure fit_html is JSON-serializable
+                if "fit_html" in result_dict and not (result_dict["fit_html"] is None or isinstance(result_dict["fit_html"], str)):
+                    result_dict["fit_html"] = None
                 # If PDF exists, encode it to base64
                 if result_dict.get('pdf') is not None:
                     result_dict['pdf'] = b64encode(result_dict['pdf']).decode('utf-8')
@@ -493,6 +496,9 @@ async def handle_crawl_request(
         processed_results = []
         for result in results:
             result_dict = result.model_dump()
+            # if fit_html is not a string, set it to None to avoid serialization errors
+            if "fit_html" in result_dict and not (result_dict["fit_html"] is None or isinstance(result_dict["fit_html"], str)):
+                result_dict["fit_html"] = None
             # If PDF exists, encode it to base64
             if result_dict.get('pdf') is not None:
                 result_dict['pdf'] = b64encode(result_dict['pdf']).decode('utf-8')

deploy/docker/c4ai-code-context.md

@@ -7520,17 +7520,18 @@ class BrowserManager:
             )
             os.makedirs(browser_args["downloads_path"], exist_ok=True)
 
-        if self.config.proxy or self.config.proxy_config:
+        if self.config.proxy:
+            warnings.warn(
+                "BrowserConfig.proxy is deprecated and ignored. Use proxy_config instead.",
+                DeprecationWarning,
+            )
+        if self.config.proxy_config:
             from playwright.async_api import ProxySettings
 
-            proxy_settings = (
-                ProxySettings(server=self.config.proxy)
-                if self.config.proxy
-                else ProxySettings(
-                    server=self.config.proxy_config.server,
-                    username=self.config.proxy_config.username,
-                    password=self.config.proxy_config.password,
-                )
+            proxy_settings = ProxySettings(
+                server=self.config.proxy_config.server,
+                username=self.config.proxy_config.username,
+                password=self.config.proxy_config.password,
             )
             browser_args["proxy"] = proxy_settings
 

deploy/docker/c4ai-doc-context.md

@@ -2241,7 +2241,7 @@ docker build -t crawl4ai
 
 | Argument | Description | Default | Options |
 |----------|-------------|---------|----------|
-| PYTHON_VERSION | Python version | 3.10 | 3.8, 3.9, 3.10 |
+| PYTHON_VERSION | Python version | 3.10 | 3.10, 3.11, 3.12, 3.13 |
 | INSTALL_TYPE | Feature set | default | default, all, torch, transformer |
 | ENABLE_GPU | GPU support | false | true, false |
 | APP_HOME | Install path | /app | any valid path |

deploy/docker/server.py

@@ -267,12 +267,26 @@ async def generate_html(
     Use when you need sanitized HTML structures for building schemas or further processing.
     """
     cfg = CrawlerRunConfig()
-    async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
-        results = await crawler.arun(url=body.url, config=cfg)
-    raw_html = results[0].html
-    from crawl4ai.utils import preprocess_html_for_schema
-    processed_html = preprocess_html_for_schema(raw_html)
-    return JSONResponse({"html": processed_html, "url": body.url, "success": True})
+    try:
+        async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
+            results = await crawler.arun(url=body.url, config=cfg)
+        # Check if the crawl was successful
+        if not results[0].success:
+            raise HTTPException(
+                status_code=500,
+                detail=results[0].error_message or "Crawl failed"
+            )
+        
+        raw_html = results[0].html
+        from crawl4ai.utils import preprocess_html_for_schema
+        processed_html = preprocess_html_for_schema(raw_html)
+        return JSONResponse({"html": processed_html, "url": body.url, "success": True})
+    except Exception as e:
+        # Log and raise as HTTP 500 for other exceptions
+        raise HTTPException(
+            status_code=500,
+            detail=str(e)
+        )
 
 # Screenshot endpoint
 
@@ -290,18 +304,29 @@ async def generate_screenshot(
     Use when you need an image snapshot of the rendered page. Its recommened to provide an output path to save the screenshot.
     Then in result instead of the screenshot you will get a path to the saved file.
     """
-    cfg = CrawlerRunConfig(
-        screenshot=True, screenshot_wait_for=body.screenshot_wait_for)
-    async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
-        results = await crawler.arun(url=body.url, config=cfg)
-    screenshot_data = results[0].screenshot
-    if body.output_path:
-        abs_path = os.path.abspath(body.output_path)
-        os.makedirs(os.path.dirname(abs_path), exist_ok=True)
-        with open(abs_path, "wb") as f:
-            f.write(base64.b64decode(screenshot_data))
-        return {"success": True, "path": abs_path}
-    return {"success": True, "screenshot": screenshot_data}
+    try:
+        cfg = CrawlerRunConfig(
+            screenshot=True, screenshot_wait_for=body.screenshot_wait_for)
+        async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
+            results = await crawler.arun(url=body.url, config=cfg)
+        if not results[0].success:
+            raise HTTPException(
+                status_code=500,
+                detail=results[0].error_message or "Crawl failed"
+            )
+        screenshot_data = results[0].screenshot
+        if body.output_path:
+            abs_path = os.path.abspath(body.output_path)
+            os.makedirs(os.path.dirname(abs_path), exist_ok=True)
+            with open(abs_path, "wb") as f:
+                f.write(base64.b64decode(screenshot_data))
+            return {"success": True, "path": abs_path}
+        return {"success": True, "screenshot": screenshot_data}
+    except Exception as e:
+        raise HTTPException(
+            status_code=500,
+            detail=str(e)
+        )
 
 # PDF endpoint
 
@@ -319,17 +344,28 @@ async def generate_pdf(
     Use when you need a printable or archivable snapshot of the page. It is recommended to provide an output path to save the PDF.
     Then in result instead of the PDF you will get a path to the saved file.
     """
-    cfg = CrawlerRunConfig(pdf=True)
-    async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
-        results = await crawler.arun(url=body.url, config=cfg)
-    pdf_data = results[0].pdf
-    if body.output_path:
-        abs_path = os.path.abspath(body.output_path)
-        os.makedirs(os.path.dirname(abs_path), exist_ok=True)
-        with open(abs_path, "wb") as f:
-            f.write(pdf_data)
-        return {"success": True, "path": abs_path}
-    return {"success": True, "pdf": base64.b64encode(pdf_data).decode()}
+    try:
+        cfg = CrawlerRunConfig(pdf=True)
+        async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
+            results = await crawler.arun(url=body.url, config=cfg)
+        if not results[0].success:
+            raise HTTPException(
+                status_code=500,
+                detail=results[0].error_message or "Crawl failed"
+            )
+        pdf_data = results[0].pdf
+        if body.output_path:
+            abs_path = os.path.abspath(body.output_path)
+            os.makedirs(os.path.dirname(abs_path), exist_ok=True)
+            with open(abs_path, "wb") as f:
+                f.write(pdf_data)
+            return {"success": True, "path": abs_path}
+        return {"success": True, "pdf": base64.b64encode(pdf_data).decode()}
+    except Exception as e:
+        raise HTTPException(
+            status_code=500,
+            detail=str(e)
+        )
 
 
 @app.post("/execute_js")
@@ -385,12 +421,23 @@ async def execute_js(
         ```
 
     """
-    cfg = CrawlerRunConfig(js_code=body.scripts)
-    async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
-        results = await crawler.arun(url=body.url, config=cfg)
-    # Return JSON-serializable dict of the first CrawlResult
-    data = results[0].model_dump()
-    return JSONResponse(data)
+    try:
+        cfg = CrawlerRunConfig(js_code=body.scripts)
+        async with AsyncWebCrawler(config=BrowserConfig()) as crawler:
+            results = await crawler.arun(url=body.url, config=cfg)
+        if not results[0].success:
+            raise HTTPException(
+                status_code=500,
+                detail=results[0].error_message or "Crawl failed"
+            )
+        # Return JSON-serializable dict of the first CrawlResult
+        data = results[0].model_dump()
+        return JSONResponse(data)
+    except Exception as e:
+        raise HTTPException(
+            status_code=500,
+            detail=str(e)
+        )
 
 
 @app.get("/llm/{url:path}")
@@ -435,16 +482,24 @@ async def crawl(
 ):
     """
     Crawl a list of URLs and return the results as JSON.
+    For streaming responses, use /crawl/stream endpoint.
     """
     if not crawl_request.urls:
         raise HTTPException(400, "At least one URL required")
-    res = await handle_crawl_request(
+    # Check whether it is a redirection for a streaming request
+    crawler_config = CrawlerRunConfig.load(crawl_request.crawler_config)
+    if crawler_config.stream:
+        return await stream_process(crawl_request=crawl_request)
+    results = await handle_crawl_request(
         urls=crawl_request.urls,
         browser_config=crawl_request.browser_config,
         crawler_config=crawl_request.crawler_config,
         config=config,
     )
-    return JSONResponse(res)
+    # check if all of the results are not successful
+    if all(not result["success"] for result in results["results"]):
+        raise HTTPException(500, f"Crawl request failed: {results['results'][0]['error_message']}")
+    return JSONResponse(results)
 
 
 @app.post("/crawl/stream")
@@ -456,12 +511,16 @@ async def crawl_stream(
 ):
     if not crawl_request.urls:
         raise HTTPException(400, "At least one URL required")
+
+    return await stream_process(crawl_request=crawl_request)
+
+async def stream_process(crawl_request: CrawlRequest):
     crawler, gen = await handle_stream_crawl_request(
         urls=crawl_request.urls,
         browser_config=crawl_request.browser_config,
         crawler_config=crawl_request.crawler_config,
         config=config,
-    )
+)
     return StreamingResponse(
         stream_results(crawler, gen),
         media_type="application/x-ndjson",

deploy/docker/static/playground/index.html

@@ -371,7 +371,7 @@
 
                 <div class="flex items-center">
                     <input id="st-stream" type="checkbox" class="mr-2">
-                    <label for="st-stream" class="text-sm">Use /crawl/stream</label>
+                    <label for="st-stream" class="text-sm">Enable streaming mode</label>
                     <button id="st-run"
                         class="ml-auto bg-accent text-dark px-4 py-2 rounded hover:bg-opacity-90 font-medium">
                         Run Stress Test
@@ -596,6 +596,14 @@
             forceHighlightElement(curlCodeEl);
         }
 
+        // Detect if stream is requested inside payload
+        function shouldUseStream(payload) {
+            const toBool = (v) => v === true || (typeof v === 'string' && v.toLowerCase() === 'true');
+            const fromCrawler = payload && payload.crawler_config && payload.crawler_config.params && payload.crawler_config.params.stream;
+            const direct = payload && payload.stream;
+            return toBool(fromCrawler) || toBool(direct);
+        }
+
         // Main run function
         async function runCrawl() {
             const endpoint = document.getElementById('endpoint').value;
@@ -611,16 +619,24 @@
                         : { browser_config: cfgJson };
                 }
             } catch (err) {
-                updateStatus('error');
-                document.querySelector('#response-content code').textContent =
-                    JSON.stringify({ error: err.message }, null, 2);
-                forceHighlightElement(document.querySelector('#response-content code'));
-                return; // stop run
+                const codeText = cm.getValue();
+                const streamFlag = /stream\s*=\s*True/i.test(codeText);
+                const isCrawlEndpoint = document.getElementById('endpoint').value === 'crawl';
+                if (isCrawlEndpoint && streamFlag) {
+                    // Fallback: proceed with minimal config only for stream
+                    advConfig = { crawler_config: { stream: true } };
+                } else {
+                    updateStatus('error');
+                    document.querySelector('#response-content code').textContent =
+                        JSON.stringify({ error: err.message }, null, 2);
+                    forceHighlightElement(document.querySelector('#response-content code'));
+                    return; // stop run
+                }
             }
 
             const endpointMap = {
                 crawl: '/crawl',
-                // crawl_stream: '/crawl/stream',
+                crawl_stream: '/crawl/stream', // Keep for backward compatibility
                 md: '/md',
                 llm: '/llm'
             };
@@ -647,7 +663,7 @@
                 // This will be handled directly in the fetch below
                 payload = null;
             } else {
-                // Default payload for /crawl and /crawl/stream
+                // Default payload for /crawl (supports both streaming and batch modes)
                 payload = {
                     urls,
                     ...advConfig
@@ -659,6 +675,7 @@
             try {
                 const startTime = performance.now();
                 let response, responseData;
+                const useStreamOverride = (endpoint === 'crawl') && shouldUseStream(payload);
 
                 if (endpoint === 'llm') {
                     // Special handling for LLM endpoint which uses URL pattern: /llm/{encoded_url}?q={query}
@@ -681,8 +698,8 @@
                     document.querySelector('#response-content code').textContent = JSON.stringify(responseData, null, 2);
                     document.querySelector('#response-content code').className = 'json hljs';
                     forceHighlightElement(document.querySelector('#response-content code'));
-                } else if (endpoint === 'crawl_stream') {
-                    // Stream processing
+                } else if (endpoint === 'crawl_stream' || useStreamOverride) {
+                    // Stream processing - now handled directly by /crawl endpoint
                     response = await fetch(api, {
                         method: 'POST',
                         headers: { 'Content-Type': 'application/json' },
@@ -757,6 +774,7 @@
                     const question = document.getElementById('llm-question').value.trim() || "What is this page about?";
                     generateSnippets(`${api}/${encodedUrl}?q=${encodeURIComponent(question)}`, null, 'GET');
                 } else {
+                    // Use the same API endpoint for both streaming and non-streaming
                     generateSnippets(api, payload);
                 }
             } catch (error) {
@@ -786,7 +804,7 @@
             document.getElementById('stress-avg-time').textContent = '0';
             document.getElementById('stress-peak-mem').textContent = '0';
 
-            const api = useStream ? '/crawl/stream' : '/crawl';
+            const api = '/crawl'; // Always use /crawl - backend handles streaming internally
             const urls = Array.from({ length: total }, (_, i) => `https://httpbin.org/anything/stress-${i}-${Date.now()}`);
             const chunks = [];
 

docs/examples/adaptive_crawling/llm_config_example.py

@@ -0,0 +1,154 @@
+import asyncio
+import os
+from crawl4ai import AsyncWebCrawler, AdaptiveCrawler, AdaptiveConfig, LLMConfig
+
+
+async def test_configuration(name: str, config: AdaptiveConfig, url: str, query: str):
+    """Test a specific configuration"""
+    print(f"\n{'='*60}")
+    print(f"Configuration: {name}")
+    print(f"{'='*60}")
+    
+    async with AsyncWebCrawler(verbose=False) as crawler:
+        adaptive = AdaptiveCrawler(crawler, config)
+        result = await adaptive.digest(start_url=url, query=query)
+        
+        print("\n" + "="*50)
+        print("CRAWL STATISTICS")
+        print("="*50)
+        adaptive.print_stats(detailed=False)
+        
+        # Get the most relevant content found
+        print("\n" + "="*50)
+        print("MOST RELEVANT PAGES")
+        print("="*50)
+        
+        relevant_pages = adaptive.get_relevant_content(top_k=5)
+        for i, page in enumerate(relevant_pages, 1):
+            print(f"\n{i}. {page['url']}")
+            print(f"   Relevance Score: {page['score']:.2%}")
+            
+            # Show a snippet of the content
+            content = page['content'] or ""
+            if content:
+                snippet = content[:200].replace('\n', ' ')
+                if len(content) > 200:
+                    snippet += "..."
+                print(f"   Preview: {snippet}")
+        
+        print(f"\n{'='*50}")
+        print(f"Pages crawled: {len(result.crawled_urls)}")
+        print(f"Final confidence: {adaptive.confidence:.1%}")
+        print(f"Stopped reason: {result.metrics.get('stopped_reason', 'max_pages')}")
+        
+        if result.metrics.get('is_irrelevant', False):
+            print("⚠️  Query detected as irrelevant!")
+        
+        return result
+
+
+async def llm_embedding():
+    """Demonstrate various embedding configurations"""
+    
+    print("EMBEDDING STRATEGY CONFIGURATION EXAMPLES")
+    print("=" * 60)
+    
+    # Base URL and query for testing
+    test_url = "https://docs.python.org/3/library/asyncio.html"
+    
+    openai_llm_config = LLMConfig(
+        provider='openai/text-embedding-3-small',
+        api_token=os.getenv('OPENAI_API_KEY'),
+        temperature=0.7,
+        max_tokens=2000
+    )
+    config_openai = AdaptiveConfig(
+        strategy="embedding",
+        max_pages=10,
+        
+        # Use OpenAI embeddings
+        embedding_llm_config=openai_llm_config,
+        # embedding_llm_config={
+        #     'provider': 'openai/text-embedding-3-small',
+        #     'api_token': os.getenv('OPENAI_API_KEY')
+        # },
+        
+        # OpenAI embeddings are high quality, can be stricter
+        embedding_k_exp=4.0,
+        n_query_variations=12
+    )
+    
+    await test_configuration(
+        "OpenAI Embeddings",
+        config_openai,
+        test_url,
+        # "event-driven architecture patterns"
+        "async await context managers coroutines"
+    )
+    return
+    
+    
+
+async def basic_adaptive_crawling():
+    """Basic adaptive crawling example"""
+    
+    # Initialize the crawler
+    async with AsyncWebCrawler(verbose=True) as crawler:
+        # Create an adaptive crawler with default settings (statistical strategy)
+        adaptive = AdaptiveCrawler(crawler)
+        
+        # Note: You can also use embedding strategy for semantic understanding:
+        # from crawl4ai import AdaptiveConfig
+        # config = AdaptiveConfig(strategy="embedding")
+        # adaptive = AdaptiveCrawler(crawler, config)
+        
+        # Start adaptive crawling
+        print("Starting adaptive crawl for Python async programming information...")
+        result = await adaptive.digest(
+            start_url="https://docs.python.org/3/library/asyncio.html",
+            query="async await context managers coroutines"
+        )
+        
+        # Display crawl statistics
+        print("\n" + "="*50)
+        print("CRAWL STATISTICS")
+        print("="*50)
+        adaptive.print_stats(detailed=False)
+        
+        # Get the most relevant content found
+        print("\n" + "="*50)
+        print("MOST RELEVANT PAGES")
+        print("="*50)
+        
+        relevant_pages = adaptive.get_relevant_content(top_k=5)
+        for i, page in enumerate(relevant_pages, 1):
+            print(f"\n{i}. {page['url']}")
+            print(f"   Relevance Score: {page['score']:.2%}")
+            
+            # Show a snippet of the content
+            content = page['content'] or ""
+            if content:
+                snippet = content[:200].replace('\n', ' ')
+                if len(content) > 200:
+                    snippet += "..."
+                print(f"   Preview: {snippet}")
+        
+        # Show final confidence
+        print(f"\n{'='*50}")
+        print(f"Final Confidence: {adaptive.confidence:.2%}")
+        print(f"Total Pages Crawled: {len(result.crawled_urls)}")
+        print(f"Knowledge Base Size: {len(adaptive.state.knowledge_base)} documents")
+        
+        
+        if adaptive.confidence >= 0.8:
+            print("✓ High confidence - can answer detailed questions about async Python")
+        elif adaptive.confidence >= 0.6:
+            print("~ Moderate confidence - can answer basic questions") 
+        else:
+            print("✗ Low confidence - need more information")
+
+
+
+if __name__ == "__main__":
+    asyncio.run(llm_embedding())
+    # asyncio.run(basic_adaptive_crawling())

docs/examples/website-to-api/.gitignore

@@ -0,0 +1,221 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[codz]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py.cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# UV
+#   Similar to Pipfile.lock, it is generally recommended to include uv.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#uv.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+#poetry.toml
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#   pdm recommends including project-wide configuration in pdm.toml, but excluding .pdm-python.
+#   https://pdm-project.org/en/latest/usage/project/#working-with-version-control
+#pdm.lock
+#pdm.toml
+.pdm-python
+.pdm-build/
+
+# pixi
+#   Similar to Pipfile.lock, it is generally recommended to include pixi.lock in version control.
+#pixi.lock
+#   Pixi creates a virtual environment in the .pixi directory, just like venv module creates one
+#   in the .venv directory. It is recommended not to include this directory in version control.
+.pixi
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# Redis 
+*.rdb
+*.aof
+*.pid
+
+# RabbitMQ
+mnesia/
+rabbitmq/
+rabbitmq-data/
+
+# ActiveMQ
+activemq-data/
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.envrc
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+# Abstra
+# Abstra is an AI-powered process automation framework.
+# Ignore directories containing user credentials, local state, and settings.
+# Learn more at https://abstra.io/docs
+.abstra/
+
+# Visual Studio Code
+#  Visual Studio Code specific template is maintained in a separate VisualStudioCode.gitignore 
+#  that can be found at https://github.com/github/gitignore/blob/main/Global/VisualStudioCode.gitignore
+#  and can be added to the global gitignore or merged into this file. However, if you prefer, 
+#  you could uncomment the following to ignore the entire vscode folder
+# .vscode/
+
+# Ruff stuff:
+.ruff_cache/
+
+# PyPI configuration file
+.pypirc
+
+# Marimo
+marimo/_static/
+marimo/_lsp/
+__marimo__/
+
+# Streamlit
+.streamlit/secrets.toml
+
+#directories
+models
+schemas
+saved_requests

docs/examples/website-to-api/README.md

@@ -0,0 +1,252 @@
+# Web Scraper API with Custom Model Support
+
+A powerful web scraping API that converts any website into structured data using AI. Features a beautiful minimalist frontend interface and support for custom LLM models!
+
+## Features
+
+- **AI-Powered Scraping**: Provide a URL and plain English query to extract structured data
+- **Beautiful Frontend**: Modern minimalist black-and-white interface with smooth UX
+- **Custom Model Support**: Use any LLM provider (OpenAI, Gemini, Anthropic, etc.) with your own API keys
+- **Model Management**: Save, list, and manage multiple model configurations via web interface
+- **Dual Scraping Approaches**: Choose between Schema-based (faster) or LLM-based (more flexible) extraction
+- **API Request History**: Automatic saving and display of all API requests with cURL commands
+- **Schema Caching**: Intelligent caching of generated schemas for faster subsequent requests
+- **Duplicate Prevention**: Avoids saving duplicate requests (same URL + query)
+- **RESTful API**: Easy-to-use HTTP endpoints for all operations
+
+## Quick Start
+
+### 1. Install Dependencies
+
+```bash
+pip install -r requirements.txt
+```
+
+### 2. Start the API Server
+
+```bash
+python app.py
+```
+
+The server will start on `http://localhost:8000` with a beautiful web interface!
+
+### 3. Using the Web Interface
+
+Once the server is running, open your browser and go to `http://localhost:8000` to access the modern web interface!
+
+#### Pages:
+- **Scrape Data**: Enter URLs and queries to extract structured data
+- **Models**: Manage your AI model configurations (add, list, delete)
+- **API Requests**: View history of all scraping requests with cURL commands
+
+#### Features:
+- **Minimalist Design**: Clean black-and-white theme inspired by modern web apps
+- **Real-time Results**: See extracted data in formatted JSON
+- **Copy to Clipboard**: Easy copying of results
+- **Toast Notifications**: User-friendly feedback
+- **Dual Scraping Modes**: Choose between Schema-based and LLM-based approaches
+
+## Model Management
+
+### Adding Models via Web Interface
+
+1. Go to the **Models** page
+2. Enter your model details:
+   - **Provider**: LLM provider (e.g., `gemini/gemini-2.5-flash`, `openai/gpt-4o`)
+   - **API Token**: Your API key for the provider
+3. Click "Add Model"
+
+### API Usage for Model Management
+
+#### Save a Model Configuration
+
+```bash
+curl -X POST "http://localhost:8000/models" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "provider": "gemini/gemini-2.5-flash",
+    "api_token": "your-api-key-here"
+  }'
+```
+
+#### List Saved Models
+
+```bash
+curl -X GET "http://localhost:8000/models"
+```
+
+#### Delete a Model Configuration
+
+```bash
+curl -X DELETE "http://localhost:8000/models/my-gemini"
+```
+
+## Scraping Approaches
+
+### 1. Schema-based Scraping (Faster)
+- Generates CSS selectors for targeted extraction
+- Caches schemas for repeated requests
+- Faster execution for structured websites
+
+### 2. LLM-based Scraping (More Flexible)
+- Direct LLM extraction without schema generation
+- More flexible for complex or dynamic content
+- Better for unstructured data extraction
+
+## Supported LLM Providers
+
+The API supports any LLM provider that crawl4ai supports, including:
+
+- **Google Gemini**: `gemini/gemini-2.5-flash`, `gemini/gemini-pro`
+- **OpenAI**: `openai/gpt-4`, `openai/gpt-3.5-turbo`
+- **Anthropic**: `anthropic/claude-3-opus`, `anthropic/claude-3-sonnet`
+- **And more...**
+
+## API Endpoints
+
+### Core Endpoints
+
+- `POST /scrape` - Schema-based scraping
+- `POST /scrape-with-llm` - LLM-based scraping
+- `GET /schemas` - List cached schemas
+- `POST /clear-cache` - Clear schema cache
+- `GET /health` - Health check
+
+### Model Management Endpoints
+
+- `GET /models` - List saved model configurations
+- `POST /models` - Save a new model configuration
+- `DELETE /models/{model_name}` - Delete a model configuration
+
+### API Request History
+
+- `GET /saved-requests` - List all saved API requests
+- `DELETE /saved-requests/{request_id}` - Delete a saved request
+
+## Request/Response Examples
+
+### Scrape Request
+
+```json
+{
+  "url": "https://example.com",
+  "query": "Extract the product name, price, and description",
+  "model_name": "my-custom-model"
+}
+```
+
+### Scrape Response
+
+```json
+{
+  "success": true,
+  "url": "https://example.com",
+  "query": "Extract the product name, price, and description",
+  "extracted_data": {
+    "product_name": "Example Product",
+    "price": "$99.99",
+    "description": "This is an example product description"
+  },
+  "schema_used": { ... },
+  "timestamp": "2024-01-01T12:00:00Z"
+}
+```
+
+### Model Configuration Request
+
+```json
+{
+  "provider": "gemini/gemini-2.5-flash",
+  "api_token": "your-api-key-here"
+}
+```
+
+## Testing
+
+Run the test script to verify the model management functionality:
+
+```bash
+python test_models.py
+```
+
+## File Structure
+
+```
+parse_example/
+├── api_server.py          # FastAPI server with all endpoints
+├── web_scraper_lib.py     # Core scraping library
+├── test_models.py         # Test script for model management
+├── requirements.txt       # Dependencies
+├── static/               # Frontend files
+│   ├── index.html        # Main HTML interface
+│   ├── styles.css        # CSS styles (minimalist theme)
+│   └── script.js         # JavaScript functionality
+├── schemas/              # Cached schemas
+├── models/               # Saved model configurations
+├── saved_requests/       # API request history
+└── README.md            # This file
+```
+
+## Advanced Usage
+
+### Using the Library Directly
+
+```python
+from web_scraper_lib import WebScraperAgent
+
+# Initialize agent
+agent = WebScraperAgent()
+
+# Save a model configuration
+agent.save_model_config(
+    model_name="my-model",
+    provider="openai/gpt-4",
+    api_token="your-api-key"
+)
+
+# Schema-based scraping
+result = await agent.scrape_data(
+    url="https://example.com",
+    query="Extract product information",
+    model_name="my-model"
+)
+
+# LLM-based scraping
+result = await agent.scrape_data_with_llm(
+    url="https://example.com",
+    query="Extract product information",
+    model_name="my-model"
+)
+```
+
+### Schema Caching
+
+The system automatically caches generated schemas based on URL and query combinations:
+
+- **First request**: Generates schema using AI
+- **Subsequent requests**: Uses cached schema for faster extraction
+
+### API Request History
+
+All API requests are automatically saved with:
+- Request details (URL, query, model used)
+- Response data
+- Timestamp
+- cURL command for re-execution
+
+### Duplicate Prevention
+
+The system prevents saving duplicate requests:
+- Same URL + query combinations are not saved multiple times
+- Returns existing request ID for duplicates
+- Keeps the API request history clean
+
+## Error Handling
+
+The API provides detailed error messages for common issues:
+
+- Invalid URLs
+- Missing model configurations
+- API key errors
+- Network timeouts
+- Parsing errors

docs/examples/website-to-api/api_server.py

@@ -0,0 +1,363 @@
+from fastapi import FastAPI, HTTPException
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
+from pydantic import BaseModel, HttpUrl
+from typing import Dict, Any, Optional, Union, List
+import uvicorn
+import asyncio
+import os
+import json
+from datetime import datetime
+from web_scraper_lib import WebScraperAgent, scrape_website
+
+app = FastAPI(
+    title="Web Scraper API",
+    description="Convert any website into a structured data API. Provide a URL and tell AI what data you need in plain English.",
+    version="1.0.0"
+)
+
+# Mount static files
+if os.path.exists("static"):
+    app.mount("/static", StaticFiles(directory="static"), name="static")
+
+# Mount assets directory
+if os.path.exists("assets"):
+    app.mount("/assets", StaticFiles(directory="assets"), name="assets")
+
+# Initialize the scraper agent
+scraper_agent = WebScraperAgent()
+
+# Create directory for saved API requests
+os.makedirs("saved_requests", exist_ok=True)
+
+class ScrapeRequest(BaseModel):
+    url: HttpUrl
+    query: str
+    model_name: Optional[str] = None
+
+class ModelConfigRequest(BaseModel):
+    model_name: str
+    provider: str
+    api_token: str
+
+class ScrapeResponse(BaseModel):
+    success: bool
+    url: str
+    query: str
+    extracted_data: Union[Dict[str, Any], list]
+    schema_used: Optional[Dict[str, Any]] = None
+    timestamp: Optional[str] = None
+    error: Optional[str] = None
+
+class SavedApiRequest(BaseModel):
+    id: str
+    endpoint: str
+    method: str
+    headers: Dict[str, str]
+    body: Dict[str, Any]
+    timestamp: str
+    response: Optional[Dict[str, Any]] = None
+
+def save_api_request(endpoint: str, method: str, headers: Dict[str, str], body: Dict[str, Any], response: Optional[Dict[str, Any]] = None) -> str:
+    """Save an API request to a JSON file."""
+    
+    # Check for duplicate requests (same URL and query)
+    if endpoint in ["/scrape", "/scrape-with-llm"] and "url" in body and "query" in body:
+        existing_requests = get_saved_requests()
+        for existing_request in existing_requests:
+            if (existing_request.endpoint == endpoint and 
+                existing_request.body.get("url") == body["url"] and 
+                existing_request.body.get("query") == body["query"]):
+                print(f"Duplicate request found for URL: {body['url']} and query: {body['query']}")
+                return existing_request.id  # Return existing request ID instead of creating new one
+    
+    request_id = datetime.now().strftime("%Y%m%d_%H%M%S_%f")[:-3]
+    
+    saved_request = SavedApiRequest(
+        id=request_id,
+        endpoint=endpoint,
+        method=method,
+        headers=headers,
+        body=body,
+        timestamp=datetime.now().isoformat(),
+        response=response
+    )
+    
+    file_path = os.path.join("saved_requests", f"{request_id}.json")
+    with open(file_path, "w") as f:
+        json.dump(saved_request.dict(), f, indent=2)
+    
+    return request_id
+
+def get_saved_requests() -> List[SavedApiRequest]:
+    """Get all saved API requests."""
+    requests = []
+    if os.path.exists("saved_requests"):
+        for filename in os.listdir("saved_requests"):
+            if filename.endswith('.json'):
+                file_path = os.path.join("saved_requests", filename)
+                try:
+                    with open(file_path, "r") as f:
+                        data = json.load(f)
+                        requests.append(SavedApiRequest(**data))
+                except Exception as e:
+                    print(f"Error loading saved request {filename}: {e}")
+    
+    # Sort by timestamp (newest first)
+    requests.sort(key=lambda x: x.timestamp, reverse=True)
+    return requests
+
+@app.get("/")
+async def root():
+    """Serve the frontend interface."""
+    if os.path.exists("static/index.html"):
+        return FileResponse("static/index.html")
+    else:
+        return {
+            "message": "Web Scraper API",
+            "description": "Convert any website into structured data with AI",
+            "endpoints": {
+                "/scrape": "POST - Scrape data from a website",
+                "/schemas": "GET - List cached schemas",
+                "/clear-cache": "POST - Clear schema cache",
+                "/models": "GET - List saved model configurations",
+                "/models": "POST - Save a new model configuration",
+                "/models/{model_name}": "DELETE - Delete a model configuration",
+                "/saved-requests": "GET - List saved API requests"
+            }
+        }
+
+@app.post("/scrape", response_model=ScrapeResponse)
+async def scrape_website_endpoint(request: ScrapeRequest):
+    """
+    Scrape structured data from any website.
+    
+    This endpoint:
+    1. Takes a URL and plain English query
+    2. Generates a custom scraper using AI
+    3. Returns structured data
+    """
+    try:
+        # Save the API request
+        headers = {"Content-Type": "application/json"}
+        body = {
+            "url": str(request.url),
+            "query": request.query,
+            "model_name": request.model_name
+        }
+        
+        result = await scraper_agent.scrape_data(
+            url=str(request.url),
+            query=request.query,
+            model_name=request.model_name
+        )
+        
+        response_data = ScrapeResponse(
+            success=True,
+            url=result["url"],
+            query=result["query"],
+            extracted_data=result["extracted_data"],
+            schema_used=result["schema_used"],
+            timestamp=result["timestamp"]
+        )
+        
+        # Save the request with response
+        save_api_request(
+            endpoint="/scrape",
+            method="POST",
+            headers=headers,
+            body=body,
+            response=response_data.dict()
+        )
+        
+        return response_data
+    
+    except Exception as e:
+        # Save the failed request
+        headers = {"Content-Type": "application/json"}
+        body = {
+            "url": str(request.url),
+            "query": request.query,
+            "model_name": request.model_name
+        }
+        
+        save_api_request(
+            endpoint="/scrape",
+            method="POST",
+            headers=headers,
+            body=body,
+            response={"error": str(e)}
+        )
+        
+        raise HTTPException(status_code=500, detail=f"Scraping failed: {str(e)}")
+
+@app.post("/scrape-with-llm", response_model=ScrapeResponse)
+async def scrape_website_endpoint_with_llm(request: ScrapeRequest):
+    """
+    Scrape structured data from any website using a custom LLM model.
+    """
+    try:
+        # Save the API request
+        headers = {"Content-Type": "application/json"}
+        body = {
+            "url": str(request.url),
+            "query": request.query,
+            "model_name": request.model_name
+        }
+        
+        result = await scraper_agent.scrape_data_with_llm(
+            url=str(request.url),
+            query=request.query,
+            model_name=request.model_name
+        )
+        
+        response_data = ScrapeResponse(
+            success=True,
+            url=result["url"],
+            query=result["query"],
+            extracted_data=result["extracted_data"],
+            timestamp=result["timestamp"]
+        )
+        
+        # Save the request with response
+        save_api_request(
+            endpoint="/scrape-with-llm",
+            method="POST",
+            headers=headers,
+            body=body,
+            response=response_data.dict()
+        )
+        
+        return response_data
+    
+    except Exception as e:
+        # Save the failed request
+        headers = {"Content-Type": "application/json"}
+        body = {
+            "url": str(request.url),
+            "query": request.query,
+            "model_name": request.model_name
+        }
+        
+        save_api_request(
+            endpoint="/scrape-with-llm",
+            method="POST",
+            headers=headers,
+            body=body,
+            response={"error": str(e)}
+        )
+        
+        raise HTTPException(status_code=500, detail=f"Scraping failed: {str(e)}")
+
+@app.get("/saved-requests")
+async def list_saved_requests():
+    """List all saved API requests."""
+    try:
+        requests = get_saved_requests()
+        return {
+            "success": True,
+            "requests": [req.dict() for req in requests],
+            "count": len(requests)
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to list saved requests: {str(e)}")
+
+@app.delete("/saved-requests/{request_id}")
+async def delete_saved_request(request_id: str):
+    """Delete a saved API request."""
+    try:
+        file_path = os.path.join("saved_requests", f"{request_id}.json")
+        if os.path.exists(file_path):
+            os.remove(file_path)
+            return {
+                "success": True,
+                "message": f"Saved request '{request_id}' deleted successfully"
+            }
+        else:
+            raise HTTPException(status_code=404, detail=f"Saved request '{request_id}' not found")
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to delete saved request: {str(e)}")
+
+@app.get("/schemas")
+async def list_cached_schemas():
+    """List all cached schemas."""
+    try:
+        schemas = await scraper_agent.get_cached_schemas()
+        return {
+            "success": True,
+            "cached_schemas": schemas,
+            "count": len(schemas)
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to list schemas: {str(e)}")
+
+@app.post("/clear-cache")
+async def clear_schema_cache():
+    """Clear all cached schemas."""
+    try:
+        scraper_agent.clear_cache()
+        return {
+            "success": True,
+            "message": "Schema cache cleared successfully"
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to clear cache: {str(e)}")
+
+@app.get("/models")
+async def list_models():
+    """List all saved model configurations."""
+    try:
+        models = scraper_agent.list_saved_models()
+        return {
+            "success": True,
+            "models": models,
+            "count": len(models)
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to list models: {str(e)}")
+
+@app.post("/models")
+async def save_model_config(request: ModelConfigRequest):
+    """Save a new model configuration."""
+    try:
+        success = scraper_agent.save_model_config(
+            model_name=request.model_name,
+            provider=request.provider,
+            api_token=request.api_token
+        )
+        
+        if success:
+            return {
+                "success": True,
+                "message": f"Model configuration '{request.model_name}' saved successfully"
+            }
+        else:
+            raise HTTPException(status_code=500, detail="Failed to save model configuration")
+    
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to save model: {str(e)}")
+
+@app.delete("/models/{model_name}")
+async def delete_model_config(model_name: str):
+    """Delete a model configuration."""
+    try:
+        success = scraper_agent.delete_model_config(model_name)
+        
+        if success:
+            return {
+                "success": True,
+                "message": f"Model configuration '{model_name}' deleted successfully"
+            }
+        else:
+            raise HTTPException(status_code=404, detail=f"Model configuration '{model_name}' not found")
+    
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Failed to delete model: {str(e)}")
+
+@app.get("/health")
+async def health_check():
+    """Health check endpoint."""
+    return {"status": "healthy", "service": "web-scraper-api"}
+
+if __name__ == "__main__":
+    uvicorn.run(app, host="0.0.0.0", port=8000)

docs/examples/website-to-api/app.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+"""
+Startup script for the Web Scraper API with frontend interface.
+"""
+
+import os
+import sys
+import uvicorn
+from pathlib import Path
+
+def main():
+    # Check if static directory exists
+    static_dir = Path("static")
+    if not static_dir.exists():
+        print("❌ Static directory not found!")
+        print("Please make sure the 'static' directory exists with the frontend files.")
+        sys.exit(1)
+    
+    # Check if required frontend files exist
+    required_files = ["index.html", "styles.css", "script.js"]
+    missing_files = []
+    
+    for file in required_files:
+        if not (static_dir / file).exists():
+            missing_files.append(file)
+    
+    if missing_files:
+        print(f"❌ Missing frontend files: {', '.join(missing_files)}")
+        print("Please make sure all frontend files are present in the static directory.")
+        sys.exit(1)
+    
+    print("🚀 Starting Web Scraper API with Frontend Interface")
+    print("=" * 50)
+    print("📁 Static files found and ready to serve")
+    print("🌐 Frontend will be available at: http://localhost:8000")
+    print("🔌 API endpoints available at: http://localhost:8000/docs")
+    print("=" * 50)
+    
+    # Start the server
+    uvicorn.run(
+        "api_server:app",
+        host="0.0.0.0",
+        port=8000,
+        reload=True,
+        log_level="info"
+    )
+
+if __name__ == "__main__":
+    main() 

docs/examples/website-to-api/requirements.txt

@@ -0,0 +1,5 @@
+crawl4ai
+fastapi
+uvicorn
+pydantic
+litellm

docs/examples/website-to-api/static/index.html

@@ -0,0 +1,201 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Web2API Example</title>
+    <link rel="stylesheet" href="/static/styles.css">
+    <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css" rel="stylesheet">
+</head>
+<body>
+    <!-- Header -->
+    <header class="header">
+        <div class="header-content">
+            <div class="logo">
+                <img src="/assets/crawl4ai_logo.jpg" alt="Crawl4AI Logo" class="logo-image">
+                <span>Web2API Example</span>
+            </div>
+            <nav class="nav-links">
+                <a href="#" class="nav-link active" data-page="scrape">Scrape</a>
+                <a href="#" class="nav-link" data-page="models">Models</a>
+                <a href="#" class="nav-link" data-page="requests">API Requests</a>
+            </nav>
+        </div>
+    </header>
+
+    <!-- Main Content -->
+    <main class="main-content">
+        <!-- Scrape Page -->
+        <div id="scrape-page" class="page active">
+            <div class="hero-section">
+                <h1 class="hero-title">Turn Any Website Into An API</h1>
+                <p class="hero-subtitle">This example shows how to turn any website into an API using Crawl4AI.</p>
+            </div>
+
+            <!-- Workflow Demonstration -->
+            <div class="workflow-demo">
+                <div class="workflow-step">
+                    <h3 class="step-title">1. Your Request</h3>
+                    <div class="request-box">
+                        <div class="input-group">
+                            <label>URL:</label>
+                            <input type="url" id="url" name="url" placeholder="https://example-bookstore.com/new-releases" required>
+                        </div>
+                        <div class="input-group">
+                            <label>QUERY:</label>
+                            <textarea id="query" name="query" placeholder="Extract all the book titles, their authors, and the biography of the author" required></textarea>
+                        </div>
+                        <div class="form-options">
+                            <div class="option-group">
+                                <label for="scraping-approach">Approach:</label>
+                                <select id="scraping-approach" name="scraping_approach">
+                                    <option value="llm">LLM-based (More Flexible)</option>
+                                    <option value="schema">Schema-based (Uses LLM once!)</option>
+                                </select>
+                            </div>
+                            <div class="option-group">
+                                <label for="model-select">Model:</label>
+                                <select id="model-select" name="model_name" required>
+                                    <option value="">Select a Model</option>
+                                </select>
+                            </div>
+                        </div>
+                        <button type="submit" id="extract-btn" class="extract-btn">
+                            <i class="fas fa-magic"></i>
+                            Extract Data
+                        </button>
+                    </div>
+                </div>
+
+                <div class="workflow-arrow">→</div>
+
+                <div class="workflow-step">
+                    <h3 class="step-title">2. Your Instant API & Data</h3>
+                    <div class="response-container">
+                        <div class="api-request-box">
+                            <label>API Request (cURL):</label>
+                            <pre id="curl-example">curl -X POST http://localhost:8000/scrape -H "Content-Type: application/json" -d '{"url": "...", "query": "..."}'
+
+# Or for LLM-based approach:
+curl -X POST http://localhost:8000/scrape-with-llm -H "Content-Type: application/json" -d '{"url": "...", "query": "..."}'</pre>
+                        </div>
+                        <div class="json-response-box">
+                            <label>JSON Response:</label>
+                            <pre id="json-output">{
+  "success": true,
+  "extracted_data": [
+    {
+      "title": "Example Book",
+      "author": "John Doe",
+      "description": "A great book..."
+    }
+  ]
+}</pre>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <!-- Results Section -->
+            <div id="results-section" class="results-section" style="display: none;">
+                <div class="results-header">
+                    <h2>Extracted Data</h2>
+                    <button id="copy-json" class="copy-btn">
+                        <i class="fas fa-copy"></i>
+                        Copy JSON
+                    </button>
+                </div>
+                <div class="results-content">
+                    <div class="result-info">
+                        <div class="info-item">
+                            <span class="label">URL:</span>
+                            <span id="result-url" class="value"></span>
+                        </div>
+                        <div class="info-item">
+                            <span class="label">Query:</span>
+                            <span id="result-query" class="value"></span>
+                        </div>
+                        <div class="info-item">
+                            <span class="label">Model Used:</span>
+                            <span id="result-model" class="value"></span>
+                        </div>
+                    </div>
+                    <div class="json-display">
+                        <pre id="actual-json-output"></pre>
+                    </div>
+                </div>
+            </div>
+
+            <!-- Loading State -->
+            <div id="loading" class="loading" style="display: none;">
+                <div class="spinner"></div>
+                <p>AI is analyzing the website and extracting data...</p>
+            </div>
+        </div>
+
+        <!-- Models Page -->
+        <div id="models-page" class="page">
+            <div class="models-header">
+                <h1>Model Configuration</h1>
+                <p>Configure and manage your AI model configurations</p>
+            </div>
+
+            <div class="models-container">
+                <!-- Add New Model Form -->
+                <div class="model-form-section">
+                    <h3>Add New Model</h3>
+                    <form id="model-form" class="model-form">
+                        <div class="form-row">
+                            <div class="input-group">
+                                <label for="model-name">Model Name:</label>
+                                <input type="text" id="model-name" name="model_name" placeholder="my-gemini" required>
+                            </div>
+                            <div class="input-group">
+                                <label for="provider">Provider:</label>
+                                <input type="text" id="provider" name="provider" placeholder="gemini/gemini-2.5-flash" required>
+                            </div>
+                        </div>
+                        
+                        <div class="input-group">
+                            <label for="api-token">API Token:</label>
+                            <input type="password" id="api-token" name="api_token" placeholder="Enter your API token" required>
+                        </div>
+
+                        <button type="submit" class="save-btn">
+                            <i class="fas fa-save"></i>
+                            Save Model
+                        </button>
+                    </form>
+                </div>
+
+                <!-- Saved Models List -->
+                <div class="saved-models-section">
+                    <h3>Saved Models</h3>
+                    <div id="models-list" class="models-list">
+                        <!-- Models will be loaded here -->
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <!-- API Requests Page -->
+        <div id="requests-page" class="page">
+            <div class="requests-header">
+                <h1>Saved API Requests</h1>
+                <p>View and manage your previous API requests</p>
+            </div>
+
+            <div class="requests-container">
+                <div class="requests-list" id="requests-list">
+                    <!-- Saved requests will be loaded here -->
+                </div>
+            </div>
+        </div>
+    </main>
+
+    <!-- Toast Notifications -->
+    <div id="toast-container" class="toast-container"></div>
+
+    <script src="/static/script.js"></script>
+</body>
+</html> 

docs/examples/website-to-api/static/script.js

@@ -0,0 +1,401 @@
+// API Configuration
+const API_BASE_URL = 'http://localhost:8000';
+
+// DOM Elements
+const navLinks = document.querySelectorAll('.nav-link');
+const pages = document.querySelectorAll('.page');
+const scrapeForm = document.getElementById('scrape-form');
+const modelForm = document.getElementById('model-form');
+const modelSelect = document.getElementById('model-select');
+const modelsList = document.getElementById('models-list');
+const resultsSection = document.getElementById('results-section');
+const loadingSection = document.getElementById('loading');
+const copyJsonBtn = document.getElementById('copy-json');
+
+// Navigation
+navLinks.forEach(link => {
+    link.addEventListener('click', (e) => {
+        e.preventDefault();
+        const targetPage = link.dataset.page;
+        
+        // Update active nav link
+        navLinks.forEach(l => l.classList.remove('active'));
+        link.classList.add('active');
+        
+        // Show target page
+        pages.forEach(page => page.classList.remove('active'));
+        document.getElementById(`${targetPage}-page`).classList.add('active');
+        
+        // Load data for the page
+        if (targetPage === 'models') {
+            loadModels();
+        } else if (targetPage === 'requests') {
+            loadSavedRequests();
+        }
+    });
+});
+
+// Scrape Form Handler
+document.getElementById('extract-btn').addEventListener('click', async (e) => {
+    e.preventDefault();
+    
+    // Scroll to results section immediately when button is clicked
+    document.getElementById('results-section').scrollIntoView({ 
+        behavior: 'smooth', 
+        block: 'start' 
+    });
+    
+    const url = document.getElementById('url').value;
+    const query = document.getElementById('query').value;
+    const headless = true; // Always use headless mode
+    const model_name = document.getElementById('model-select').value || null;
+    const scraping_approach = document.getElementById('scraping-approach').value;
+    
+    if (!url || !query) {
+        showToast('Please fill in both URL and query fields', 'error');
+        return;
+    }
+    
+    if (!model_name) {
+        showToast('Please select a model from the dropdown or add one from the Models page', 'error');
+        return;
+    }
+    
+    const data = {
+        url: url,
+        query: query,
+        headless: headless,
+        model_name: model_name
+    };
+    
+    // Show loading state
+    showLoading(true);
+    hideResults();
+    
+    try {
+        // Choose endpoint based on scraping approach
+        const endpoint = scraping_approach === 'llm' ? '/scrape-with-llm' : '/scrape';
+        
+        const response = await fetch(`${API_BASE_URL}${endpoint}`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json'
+            },
+            body: JSON.stringify(data)
+        });
+        
+        const result = await response.json();
+        
+        if (response.ok) {
+            displayResults(result);
+            showToast(`Data extracted successfully using ${scraping_approach === 'llm' ? 'LLM-based' : 'Schema-based'} approach!`, 'success');
+        } else {
+            throw new Error(result.detail || 'Failed to extract data');
+        }
+    } catch (error) {
+        console.error('Scraping error:', error);
+        showToast(`Error: ${error.message}`, 'error');
+    } finally {
+        showLoading(false);
+    }
+});
+
+// Model Form Handler
+modelForm.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    
+    const formData = new FormData(modelForm);
+    const data = {
+        model_name: formData.get('model_name'),
+        provider: formData.get('provider'),
+        api_token: formData.get('api_token')
+    };
+    
+    try {
+        const response = await fetch(`${API_BASE_URL}/models`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json'
+            },
+            body: JSON.stringify(data)
+        });
+        
+        const result = await response.json();
+        
+        if (response.ok) {
+            showToast('Model saved successfully!', 'success');
+            modelForm.reset();
+            loadModels();
+            loadModelSelect();
+        } else {
+            throw new Error(result.detail || 'Failed to save model');
+        }
+    } catch (error) {
+        console.error('Model save error:', error);
+        showToast(`Error: ${error.message}`, 'error');
+    }
+});
+
+// Copy JSON Button
+copyJsonBtn.addEventListener('click', () => {
+    const actualJsonOutput = document.getElementById('actual-json-output');
+    const textToCopy = actualJsonOutput.textContent;
+    
+    navigator.clipboard.writeText(textToCopy).then(() => {
+        showToast('JSON copied to clipboard!', 'success');
+    }).catch(() => {
+        showToast('Failed to copy JSON', 'error');
+    });
+});
+
+// Load Models
+async function loadModels() {
+    try {
+        const response = await fetch(`${API_BASE_URL}/models`);
+        const result = await response.json();
+        
+        if (response.ok) {
+            displayModels(result.models);
+        } else {
+            throw new Error(result.detail || 'Failed to load models');
+        }
+    } catch (error) {
+        console.error('Load models error:', error);
+        showToast(`Error: ${error.message}`, 'error');
+    }
+}
+
+// Display Models
+function displayModels(models) {
+    if (models.length === 0) {
+        modelsList.innerHTML = '<p style="text-align: center; color: #7f8c8d; padding: 2rem;">No models saved yet. Add your first model above!</p>';
+        return;
+    }
+    
+    modelsList.innerHTML = models.map(model => `
+        <div class="model-card">
+            <div class="model-info">
+                <div class="model-name">${model}</div>
+                <div class="model-provider">Model Configuration</div>
+            </div>
+            <div class="model-actions">
+                <button class="btn btn-danger" onclick="deleteModel('${model}')">
+                    <i class="fas fa-trash"></i>
+                    Delete
+                </button>
+            </div>
+        </div>
+    `).join('');
+}
+
+// Delete Model
+async function deleteModel(modelName) {
+    if (!confirm(`Are you sure you want to delete the model "${modelName}"?`)) {
+        return;
+    }
+    
+    try {
+        const response = await fetch(`${API_BASE_URL}/models/${modelName}`, {
+            method: 'DELETE'
+        });
+        
+        const result = await response.json();
+        
+        if (response.ok) {
+            showToast('Model deleted successfully!', 'success');
+            loadModels();
+            loadModelSelect();
+        } else {
+            throw new Error(result.detail || 'Failed to delete model');
+        }
+    } catch (error) {
+        console.error('Delete model error:', error);
+        showToast(`Error: ${error.message}`, 'error');
+    }
+}
+
+// Load Model Select Options
+async function loadModelSelect() {
+    try {
+        const response = await fetch(`${API_BASE_URL}/models`);
+        const result = await response.json();
+        
+        if (response.ok) {
+            // Clear existing options
+            modelSelect.innerHTML = '<option value="">Select a Model</option>';
+            
+            // Add model options
+            result.models.forEach(model => {
+                const option = document.createElement('option');
+                option.value = model;
+                option.textContent = model;
+                modelSelect.appendChild(option);
+            });
+        }
+    } catch (error) {
+        console.error('Load model select error:', error);
+    }
+}
+
+// Display Results
+function displayResults(result) {
+    // Update result info
+    document.getElementById('result-url').textContent = result.url;
+    document.getElementById('result-query').textContent = result.query;
+    document.getElementById('result-model').textContent = result.model_name || 'Default Model';
+    
+    // Display JSON in the actual results section
+    const actualJsonOutput = document.getElementById('actual-json-output');
+    actualJsonOutput.textContent = JSON.stringify(result.extracted_data, null, 2);
+    
+    // Don't update the sample JSON in the workflow demo - keep it as example
+    
+    // Update the cURL example based on the approach used
+    const scraping_approach = document.getElementById('scraping-approach').value;
+    const endpoint = scraping_approach === 'llm' ? '/scrape-with-llm' : '/scrape';
+    const curlExample = document.getElementById('curl-example');
+    curlExample.textContent = `curl -X POST http://localhost:8000${endpoint} -H "Content-Type: application/json" -d '{"url": "${result.url}", "query": "${result.query}"}'`;
+    
+    // Show results section
+    resultsSection.style.display = 'block';
+    resultsSection.scrollIntoView({ behavior: 'smooth' });
+}
+
+// Show/Hide Loading
+function showLoading(show) {
+    loadingSection.style.display = show ? 'block' : 'none';
+}
+
+// Hide Results
+function hideResults() {
+    resultsSection.style.display = 'none';
+}
+
+// Toast Notifications
+function showToast(message, type = 'info') {
+    const toastContainer = document.getElementById('toast-container');
+    const toast = document.createElement('div');
+    toast.className = `toast ${type}`;
+    
+    const icon = type === 'success' ? 'fas fa-check-circle' : 
+                 type === 'error' ? 'fas fa-exclamation-circle' : 
+                 'fas fa-info-circle';
+    
+    toast.innerHTML = `
+        <i class="${icon}"></i>
+        <span>${message}</span>
+    `;
+    
+    toastContainer.appendChild(toast);
+    
+    // Auto remove after 5 seconds
+    setTimeout(() => {
+        toast.remove();
+    }, 5000);
+}
+
+// Load Saved Requests
+async function loadSavedRequests() {
+    try {
+        const response = await fetch(`${API_BASE_URL}/saved-requests`);
+        const result = await response.json();
+        
+        if (response.ok) {
+            displaySavedRequests(result.requests);
+        } else {
+            throw new Error(result.detail || 'Failed to load saved requests');
+        }
+    } catch (error) {
+        console.error('Load saved requests error:', error);
+        showToast(`Error: ${error.message}`, 'error');
+    }
+}
+
+// Display Saved Requests
+function displaySavedRequests(requests) {
+    const requestsList = document.getElementById('requests-list');
+    
+    if (requests.length === 0) {
+        requestsList.innerHTML = '<p style="text-align: center; color: #CCCCCC; padding: 2rem;">No saved API requests yet. Make your first request from the Scrape page!</p>';
+        return;
+    }
+    
+    requestsList.innerHTML = requests.map(request => {
+        const url = request.body.url;
+        const query = request.body.query;
+        const model = request.body.model_name || 'Default Model';
+        const endpoint = request.endpoint;
+        
+        // Create curl command
+        const curlCommand = `curl -X POST http://localhost:8000${endpoint} \\
+  -H "Content-Type: application/json" \\
+  -d '{
+    "url": "${url}",
+    "query": "${query}",
+    "model_name": "${model}"
+  }'`;
+        
+        return `
+            <div class="request-card">
+                <div class="request-header">
+                    <div class="request-info">
+                        <div class="request-url">${url}</div>
+                        <div class="request-query">${query}</div>
+                    </div>
+                    <div class="request-actions">
+                        <button class="btn-danger" onclick="deleteSavedRequest('${request.id}')">
+                            <i class="fas fa-trash"></i>
+                            Delete
+                        </button>
+                    </div>
+                </div>
+                
+                <div class="request-curl">
+                    <h4>cURL Command:</h4>
+                    <pre>${curlCommand}</pre>
+                </div>
+            </div>
+        `;
+    }).join('');
+}
+
+// Delete Saved Request
+async function deleteSavedRequest(requestId) {
+    if (!confirm('Are you sure you want to delete this saved request?')) {
+        return;
+    }
+    
+    try {
+        const response = await fetch(`${API_BASE_URL}/saved-requests/${requestId}`, {
+            method: 'DELETE'
+        });
+        
+        const result = await response.json();
+        
+        if (response.ok) {
+            showToast('Saved request deleted successfully!', 'success');
+            loadSavedRequests();
+        } else {
+            throw new Error(result.detail || 'Failed to delete saved request');
+        }
+    } catch (error) {
+        console.error('Delete saved request error:', error);
+        showToast(`Error: ${error.message}`, 'error');
+    }
+}
+
+// Initialize
+document.addEventListener('DOMContentLoaded', () => {
+    loadModelSelect();
+    
+    // Check if API is available
+    fetch(`${API_BASE_URL}/health`)
+        .then(response => {
+            if (!response.ok) {
+                showToast('Warning: API server might not be running', 'error');
+            }
+        })
+        .catch(() => {
+            showToast('Warning: Cannot connect to API server. Make sure it\'s running on localhost:8000', 'error');
+        });
+}); 

docs/examples/website-to-api/static/styles.css

@@ -0,0 +1,765 @@
+/* Reset and Base Styles */
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+    background: #000000;
+    color: #FFFFFF;
+    line-height: 1.6;
+    font-size: 16px;
+}
+
+/* Header */
+.header {
+    border-bottom: 1px solid #333;
+    padding: 1rem 0;
+    background: #000000;
+    position: sticky;
+    top: 0;
+    z-index: 100;
+}
+
+.header-content {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 0 2rem;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+}
+
+.logo {
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    font-size: 1.5rem;
+    font-weight: 600;
+    color: #FFFFFF;
+}
+
+.logo-image {
+    width: 40px;
+    height: 40px;
+    border-radius: 4px;
+    object-fit: contain;
+}
+
+.nav-links {
+    display: flex;
+    gap: 2rem;
+}
+
+.nav-link {
+    color: #CCCCCC;
+    text-decoration: none;
+    font-weight: 500;
+    transition: color 0.2s ease;
+}
+
+.nav-link:hover,
+.nav-link.active {
+    color: #FFFFFF;
+}
+
+/* Main Content */
+.main-content {
+    max-width: 1200px;
+    margin: 0 auto;
+    padding: 2rem;
+}
+
+.page {
+    display: none;
+}
+
+.page.active {
+    display: block;
+}
+
+/* Hero Section */
+.hero-section {
+    text-align: center;
+    margin-bottom: 4rem;
+    padding: 2rem 0;
+}
+
+.hero-title {
+    font-size: 3rem;
+    font-weight: 700;
+    color: #FFFFFF;
+    margin-bottom: 1rem;
+    line-height: 1.2;
+}
+
+.hero-subtitle {
+    font-size: 1.25rem;
+    color: #CCCCCC;
+    max-width: 600px;
+    margin: 0 auto;
+}
+
+/* Workflow Demo */
+.workflow-demo {
+    display: grid;
+    grid-template-columns: 1fr auto 1fr;
+    gap: 2rem;
+    align-items: start;
+    margin-bottom: 4rem;
+}
+
+.workflow-step {
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+}
+
+.step-title {
+    font-size: 1.25rem;
+    font-weight: 600;
+    color: #FFFFFF;
+    text-align: center;
+    margin-bottom: 1rem;
+}
+
+.workflow-arrow {
+    font-size: 2rem;
+    font-weight: 700;
+    color: #09b5a5;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin-top: 20rem;
+}
+
+/* Request Box */
+.request-box {
+    border: 2px solid #333;
+    border-radius: 8px;
+    padding: 2rem;
+    background: #111111;
+}
+
+.input-group {
+    margin-bottom: 1.5rem;
+}
+
+.input-group label {
+    display: block;
+    font-family: 'Courier New', monospace;
+    font-weight: 600;
+    color: #FFFFFF;
+    margin-bottom: 0.5rem;
+    font-size: 0.9rem;
+}
+
+.input-group input,
+.input-group textarea,
+.input-group select {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid #333;
+    border-radius: 4px;
+    font-family: 'Courier New', monospace;
+    font-size: 0.9rem;
+    background: #1A1A1A;
+    color: #FFFFFF;
+    transition: border-color 0.2s ease;
+}
+
+.input-group input:focus,
+.input-group textarea:focus,
+.input-group select:focus {
+    outline: none;
+    border-color: #09b5a5;
+}
+
+.input-group textarea {
+    min-height: 80px;
+    resize: vertical;
+}
+
+.form-options {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 1rem;
+    margin-bottom: 1.5rem;
+}
+
+.option-group {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.option-group label {
+    font-family: 'Courier New', monospace;
+    font-weight: 600;
+    color: #FFFFFF;
+    font-size: 0.9rem;
+}
+
+.option-group input[type="checkbox"] {
+    width: auto;
+    margin-right: 0.5rem;
+}
+
+.extract-btn {
+    width: 100%;
+    padding: 1rem;
+    background: #09b5a5;
+    color: #000000;
+    border: none;
+    border-radius: 4px;
+    font-size: 1rem;
+    font-weight: 600;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 0.5rem;
+}
+
+.extract-btn:hover {
+    background: #09b5a5;
+}
+
+/* Dropdown specific styling */
+select,
+.input-group select,
+.option-group select {
+    cursor: pointer !important;
+    appearance: none !important;
+    -webkit-appearance: none !important;
+    -moz-appearance: none !important;
+    -ms-appearance: none !important;
+    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FFFFFF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6,9 12,15 18,9'%3e%3c/polyline%3e%3c/svg%3e") !important;
+    background-repeat: no-repeat !important;
+    background-position: right 0.75rem center !important;
+    background-size: 1rem !important;
+    padding-right: 2.5rem !important;
+    border: 1px solid #333 !important;
+    border-radius: 4px !important;
+    font-family: 'Courier New', monospace !important;
+    font-size: 0.9rem !important;
+    background-color: #1A1A1A !important;
+    color: #FFFFFF !important;
+}
+
+select:hover,
+.input-group select:hover,
+.option-group select:hover {
+    border-color: #09b5a5 !important;
+}
+
+select:focus,
+.input-group select:focus,
+.option-group select:focus {
+    outline: none !important;
+    border-color: #09b5a5 !important;
+}
+
+select option,
+.input-group select option,
+.option-group select option {
+    background: #1A1A1A !important;
+    color: #FFFFFF !important;
+    padding: 0.5rem !important;
+}
+
+/* Response Container */
+.response-container {
+    display: flex;
+    flex-direction: column;
+    gap: 1rem;
+}
+
+.api-request-box,
+.json-response-box {
+    border: 2px solid #333;
+    border-radius: 8px;
+    padding: 1.5rem;
+    background: #111111;
+}
+
+.api-request-box label,
+.json-response-box label {
+    display: block;
+    font-family: 'Courier New', monospace;
+    font-weight: 600;
+    color: #FFFFFF;
+    margin-bottom: 0.5rem;
+    font-size: 0.9rem;
+}
+
+.api-request-box pre,
+.json-response-box pre {
+    font-family: 'Courier New', monospace;
+    font-size: 0.85rem;
+    line-height: 1.5;
+    color: #FFFFFF;
+    background: #1A1A1A;
+    padding: 1rem;
+    border-radius: 4px;
+    overflow-x: auto;
+    white-space: pre-wrap;
+    word-break: break-all;
+}
+
+/* Results Section */
+.results-section {
+    border: 2px solid #333;
+    border-radius: 8px;
+    overflow: hidden;
+    margin-top: 2rem;
+    background: #111111;
+}
+
+.results-header {
+    background: #1A1A1A;
+    color: #FFFFFF;
+    padding: 1rem 1.5rem;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    border-bottom: 1px solid #333;
+}
+
+.results-header h2 {
+    font-size: 1.25rem;
+    font-weight: 600;
+    color: #FFFFFF;
+}
+
+.copy-btn {
+    background: #09b5a5;
+    color: #000000;
+    border: none;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    font-size: 0.9rem;
+    font-weight: 600;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    transition: background-color 0.2s ease;
+}
+
+.copy-btn:hover {
+    background: #09b5a5;
+}
+
+.results-content {
+    padding: 1.5rem;
+}
+
+.result-info {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+    gap: 1rem;
+    margin-bottom: 1.5rem;
+    padding: 1rem;
+    background: #1A1A1A;
+    border-radius: 4px;
+    border: 1px solid #333;
+}
+
+.info-item {
+    display: flex;
+    flex-direction: column;
+    gap: 0.25rem;
+}
+
+.info-item .label {
+    font-weight: 600;
+    color: #FFFFFF;
+    font-size: 0.9rem;
+}
+
+.info-item .value {
+    color: #CCCCCC;
+    word-break: break-all;
+}
+
+.json-display {
+    background: #1A1A1A;
+    border-radius: 4px;
+    overflow: hidden;
+    border: 1px solid #333;
+}
+
+.json-display pre {
+    color: #FFFFFF;
+    padding: 1.5rem;
+    margin: 0;
+    overflow-x: auto;
+    font-family: 'Courier New', monospace;
+    font-size: 0.9rem;
+    line-height: 1.5;
+}
+
+/* Loading State */
+.loading {
+    text-align: center;
+    padding: 3rem;
+}
+
+.spinner {
+    width: 40px;
+    height: 40px;
+    border: 3px solid #333;
+    border-top: 3px solid #09b5a5;
+    border-radius: 50%;
+    animation: spin 1s linear infinite;
+    margin: 0 auto 1rem;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
+/* Models Page */
+.models-header {
+    text-align: center;
+    margin-bottom: 3rem;
+}
+
+.models-header h1 {
+    font-size: 2.5rem;
+    font-weight: 700;
+    color: #FFFFFF;
+    margin-bottom: 1rem;
+}
+
+.models-header p {
+    font-size: 1.1rem;
+    color: #CCCCCC;
+}
+
+/* API Requests Page */
+.requests-header {
+    text-align: center;
+    margin-bottom: 3rem;
+}
+
+.requests-header h1 {
+    font-size: 2.5rem;
+    font-weight: 700;
+    color: #FFFFFF;
+    margin-bottom: 1rem;
+}
+
+.requests-header p {
+    font-size: 1.1rem;
+    color: #CCCCCC;
+}
+
+.requests-container {
+    max-width: 1200px;
+    margin: 0 auto;
+}
+
+.requests-list {
+    display: grid;
+    gap: 1.5rem;
+}
+
+.request-card {
+    border: 2px solid #333;
+    border-radius: 8px;
+    padding: 1.5rem;
+    background: #111111;
+    transition: border-color 0.2s ease;
+}
+
+.request-card:hover {
+    border-color: #09b5a5;
+}
+
+.request-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 1rem;
+    padding-bottom: 1rem;
+    border-bottom: 1px solid #333;
+}
+
+.request-info {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.request-url {
+    font-family: 'Courier New', monospace;
+    font-weight: 600;
+    color: #09b5a5;
+    font-size: 1.1rem;
+    word-break: break-all;
+}
+
+.request-query {
+    color: #CCCCCC;
+    font-size: 0.9rem;
+    margin-top: 0.5rem;
+    word-break: break-all;
+}
+
+.request-actions {
+    display: flex;
+    gap: 0.5rem;
+}
+
+.request-curl {
+    background: #1A1A1A;
+    border: 1px solid #333;
+    border-radius: 4px;
+    padding: 1rem;
+    margin-top: 1rem;
+}
+
+.request-curl h4 {
+    color: #FFFFFF;
+    font-size: 0.9rem;
+    font-weight: 600;
+    margin-bottom: 0.5rem;
+    font-family: 'Courier New', monospace;
+}
+
+.request-curl pre {
+    color: #CCCCCC;
+    font-size: 0.8rem;
+    line-height: 1.4;
+    overflow-x: auto;
+    white-space: pre-wrap;
+    word-break: break-all;
+    background: #111111;
+    padding: 0.75rem;
+    border-radius: 4px;
+    border: 1px solid #333;
+}
+
+.models-container {
+    max-width: 800px;
+    margin: 0 auto;
+}
+
+.model-form-section {
+    border: 2px solid #333;
+    border-radius: 8px;
+    padding: 2rem;
+    margin-bottom: 2rem;
+    background: #111111;
+}
+
+.model-form-section h3 {
+    font-size: 1.25rem;
+    font-weight: 600;
+    color: #FFFFFF;
+    margin-bottom: 1.5rem;
+}
+
+.model-form {
+    display: flex;
+    flex-direction: column;
+    gap: 1.5rem;
+}
+
+.form-row {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 1rem;
+}
+
+.save-btn {
+    padding: 1rem;
+    background: #09b5a5;
+    color: #000000;
+    border: none;
+    border-radius: 4px;
+    font-size: 1rem;
+    font-weight: 600;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 0.5rem;
+}
+
+.save-btn:hover {
+    background: #09b5a5;
+}
+
+.saved-models-section h3 {
+    font-size: 1.25rem;
+    font-weight: 600;
+    color: #FFFFFF;
+    margin-bottom: 1.5rem;
+}
+
+.models-list {
+    display: grid;
+    gap: 1rem;
+}
+
+.model-card {
+    border: 2px solid #333;
+    border-radius: 8px;
+    padding: 1.5rem;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    transition: border-color 0.2s ease;
+    background: #111111;
+}
+
+.model-card:hover {
+    border-color: #09b5a5;
+}
+
+.model-info {
+    flex: 1;
+}
+
+.model-name {
+    font-weight: 600;
+    color: #FFFFFF;
+    font-size: 1.1rem;
+    margin-bottom: 0.5rem;
+}
+
+.model-provider {
+    color: #CCCCCC;
+    font-size: 0.9rem;
+}
+
+.model-actions {
+    display: flex;
+    gap: 0.5rem;
+}
+
+.btn-danger {
+    background: #FF4444;
+    color: #FFFFFF;
+    border: none;
+    padding: 0.5rem 1rem;
+    border-radius: 4px;
+    font-size: 0.9rem;
+    font-weight: 600;
+    cursor: pointer;
+    transition: background-color 0.2s ease;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+}
+
+.btn-danger:hover {
+    background: #CC3333;
+}
+
+
+
+/* Toast Notifications */
+.toast-container {
+    position: fixed;
+    top: 20px;
+    right: 20px;
+    z-index: 1000;
+}
+
+.toast {
+    background: #111111;
+    border: 2px solid #333;
+    border-radius: 4px;
+    padding: 1rem 1.5rem;
+    margin-bottom: 0.5rem;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    animation: slideIn 0.3s ease;
+    max-width: 400px;
+    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
+    color: #FFFFFF;
+}
+
+.toast.success {
+    border-color: #09b5a5;
+    background: #0A1A1A;
+}
+
+.toast.error {
+    border-color: #FF4444;
+    background: #1A0A0A;
+}
+
+.toast.info {
+    border-color: #09b5a5;
+    background: #0A1A1A;
+}
+
+@keyframes slideIn {
+    from {
+        transform: translateX(100%);
+        opacity: 0;
+    }
+    to {
+        transform: translateX(0);
+        opacity: 1;
+    }
+}
+
+/* Responsive Design */
+@media (max-width: 768px) {
+    .header-content {
+        padding: 0 1rem;
+    }
+    
+    .main-content {
+        padding: 1rem;
+    }
+    
+    .hero-title {
+        font-size: 2rem;
+    }
+    
+    .workflow-demo {
+        grid-template-columns: 1fr;
+        gap: 1rem;
+    }
+    
+    .workflow-arrow {
+        transform: rotate(90deg);
+        margin: 1rem 0;
+    }
+    
+    .form-options {
+        grid-template-columns: 1fr;
+    }
+    
+    .form-row {
+        grid-template-columns: 1fr;
+    }
+    
+    .result-info {
+        grid-template-columns: 1fr;
+    }
+    
+    .model-card {
+        flex-direction: column;
+        gap: 1rem;
+        text-align: center;
+    }
+    
+    .model-actions {
+        width: 100%;
+        justify-content: center;
+    }
+}

docs/examples/website-to-api/test_api.py

@@ -0,0 +1,28 @@
+import asyncio
+from web_scraper_lib import scrape_website
+import os
+
+async def test_library():
+    """Test the mini library directly."""
+    print("=== Testing Mini Library ===")
+    
+    # Test 1: Scrape with a custom model
+    url = "https://marketplace.mainstreet.co.in/collections/adidas-yeezy/products/adidas-yeezy-boost-350-v2-yecheil-non-reflective"
+    query = "Extract the following data: Product name, Product price, Product description, Product size. DO NOT EXTRACT ANYTHING ELSE."
+    if os.path.exists("models"):
+        model_name = os.listdir("models")[0].split(".")[0]
+    else:
+        raise Exception("No models found in models directory")
+
+    print(f"Scraping: {url}")
+    print(f"Query: {query}")
+    
+    try:
+        result = await scrape_website(url, query, model_name)
+        print("✅ Library test successful!")
+        print(f"Extracted data: {result['extracted_data']}")
+    except Exception as e:
+        print(f"❌ Library test failed: {e}")
+
+if __name__ == "__main__":
+    asyncio.run(test_library())

docs/examples/website-to-api/test_models.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+"""
+Test script for the new model management functionality.
+This script demonstrates how to save and use custom model configurations.
+"""
+
+import asyncio
+import requests
+import json
+
+# API base URL
+BASE_URL = "http://localhost:8000"
+
+def test_model_management():
+    """Test the model management endpoints."""
+    
+    print("=== Testing Model Management ===")
+    
+    # 1. List current models
+    print("\n1. Listing current models:")
+    response = requests.get(f"{BASE_URL}/models")
+    print(f"Status: {response.status_code}")
+    print(f"Response: {json.dumps(response.json(), indent=2)}")
+    
+    
+    # 2. Save another model configuration (OpenAI example)
+    print("\n2. Saving OpenAI model configuration:")
+    openai_config = {
+        "model_name": "my-openai",
+        "provider": "openai",
+        "api_token": "your-openai-api-key-here"
+    }
+    
+    response = requests.post(f"{BASE_URL}/models", json=openai_config)
+    print(f"Status: {response.status_code}")
+    print(f"Response: {json.dumps(response.json(), indent=2)}")
+    
+    # 3. List models again to see the new ones
+    print("\n3. Listing models after adding new ones:")
+    response = requests.get(f"{BASE_URL}/models")
+    print(f"Status: {response.status_code}")
+    print(f"Response: {json.dumps(response.json(), indent=2)}")
+
+    # 4. Delete a model configuration
+    print("\n4. Deleting a model configuration:")
+    response = requests.delete(f"{BASE_URL}/models/my-openai")
+    print(f"Status: {response.status_code}")
+    print(f"Response: {json.dumps(response.json(), indent=2)}")
+    
+    # 5. Final list of models
+    print("\n5. Final list of models:")
+    response = requests.get(f"{BASE_URL}/models")
+    print(f"Status: {response.status_code}")
+    print(f"Response: {json.dumps(response.json(), indent=2)}")
+
+if __name__ == "__main__":
+    print("Model Management Test Script")
+    print("Make sure the API server is running on http://localhost:8000")
+    print("=" * 50)
+    
+    try:
+        test_model_management()
+    except requests.exceptions.ConnectionError:
+        print("Error: Could not connect to the API server.")
+        print("Make sure the server is running with: python api_server.py")
+    except Exception as e:
+        print(f"Error: {e}") 

docs/examples/website-to-api/web_scraper_lib.py

@@ -0,0 +1,397 @@
+from crawl4ai import (
+    AsyncWebCrawler,
+    BrowserConfig,
+    CacheMode,
+    CrawlerRunConfig,
+    LLMConfig,
+    JsonCssExtractionStrategy,
+    LLMExtractionStrategy
+)
+import os
+import json
+import hashlib
+from typing import Dict, Any, Optional, List
+from litellm import completion
+
+class ModelConfig:
+    """Configuration for LLM models."""
+    
+    def __init__(self, provider: str, api_token: str):
+        self.provider = provider
+        self.api_token = api_token
+    
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "provider": self.provider,
+            "api_token": self.api_token
+        }
+    
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> 'ModelConfig':
+        return cls(
+            provider=data["provider"],
+            api_token=data["api_token"]
+        )
+
+class WebScraperAgent:
+    """
+    A mini library that converts any website into a structured data API.
+    
+    Features:
+    1. Provide a URL and tell AI what data you need in plain English
+    2. Generate: Agent reverse-engineers the site and deploys custom scraper
+    3. Integrate: Use private API endpoint to get structured data
+    4. Support for custom LLM models and API keys
+    """
+    
+    def __init__(self, schemas_dir: str = "schemas", models_dir: str = "models"):
+        self.schemas_dir = schemas_dir
+        self.models_dir = models_dir
+        os.makedirs(self.schemas_dir, exist_ok=True)
+        os.makedirs(self.models_dir, exist_ok=True)
+    
+    def _generate_schema_key(self, url: str, query: str) -> str:
+        """Generate a unique key for schema caching based on URL and query."""
+        content = f"{url}:{query}"
+        return hashlib.md5(content.encode()).hexdigest()
+    
+    def save_model_config(self, model_name: str, provider: str, api_token: str) -> bool:
+        """
+        Save a model configuration for later use.
+        
+        Args:
+            model_name: User-friendly name for the model
+            provider: LLM provider (e.g., 'gemini', 'openai', 'anthropic')
+            api_token: API token for the provider
+            
+        Returns:
+            True if saved successfully
+        """
+        try:
+            model_config = ModelConfig(provider, api_token)
+            config_path = os.path.join(self.models_dir, f"{model_name}.json")
+            
+            with open(config_path, "w") as f:
+                json.dump(model_config.to_dict(), f, indent=2)
+            
+            print(f"Model configuration saved: {model_name}")
+            return True
+        except Exception as e:
+            print(f"Failed to save model configuration: {e}")
+            return False
+    
+    def load_model_config(self, model_name: str) -> Optional[ModelConfig]:
+        """
+        Load a saved model configuration.
+        
+        Args:
+            model_name: Name of the saved model configuration
+            
+        Returns:
+            ModelConfig object or None if not found
+        """
+        try:
+            config_path = os.path.join(self.models_dir, f"{model_name}.json")
+            if not os.path.exists(config_path):
+                return None
+            
+            with open(config_path, "r") as f:
+                data = json.load(f)
+            
+            return ModelConfig.from_dict(data)
+        except Exception as e:
+            print(f"Failed to load model configuration: {e}")
+            return None
+    
+    def list_saved_models(self) -> List[str]:
+        """List all saved model configurations."""
+        models = []
+        for filename in os.listdir(self.models_dir):
+            if filename.endswith('.json'):
+                models.append(filename[:-5])  # Remove .json extension
+        return models
+    
+    def delete_model_config(self, model_name: str) -> bool:
+        """
+        Delete a saved model configuration.
+        
+        Args:
+            model_name: Name of the model configuration to delete
+            
+        Returns:
+            True if deleted successfully
+        """
+        try:
+            config_path = os.path.join(self.models_dir, f"{model_name}.json")
+            if os.path.exists(config_path):
+                os.remove(config_path)
+                print(f"Model configuration deleted: {model_name}")
+                return True
+            return False
+        except Exception as e:
+            print(f"Failed to delete model configuration: {e}")
+            return False
+    
+    async def _load_or_generate_schema(self, url: str, query: str, session_id: str = "schema_generator", model_name: Optional[str] = None) -> Dict[str, Any]:
+        """
+        Loads schema from cache if exists, otherwise generates using AI.
+        This is the "Generate" step - our agent reverse-engineers the site.
+        
+        Args:
+            url: URL to scrape
+            query: Query for data extraction
+            session_id: Session identifier
+            model_name: Name of saved model configuration to use
+        """
+        schema_key = self._generate_schema_key(url, query)
+        schema_path = os.path.join(self.schemas_dir, f"{schema_key}.json")
+        
+        if os.path.exists(schema_path):
+            print(f"Schema found in cache for {url}")
+            with open(schema_path, "r") as f:
+                return json.load(f)
+        
+        print(f"Generating new schema for {url}")
+        print(f"Query: {query}")
+        query += """
+        IMPORTANT:
+        GENERATE THE SCHEMA WITH ONLY THE FIELDS MENTIONED IN THE QUERY. MAKE SURE THE NUMBER OF FIELDS IN THE SCHEME MATCH THE NUMBER OF FIELDS IN THE QUERY.
+        """
+        
+        # Step 1: Fetch the page HTML
+        async with AsyncWebCrawler(config=BrowserConfig(headless=True)) as crawler:
+            result = await crawler.arun(
+                url=url,
+                config=CrawlerRunConfig(
+                    cache_mode=CacheMode.BYPASS,
+                    session_id=session_id,
+                    simulate_user=True,
+                    remove_overlay_elements=True,
+                    delay_before_return_html=5,
+                )
+            )
+            html = result.fit_html
+        
+        # Step 2: Generate schema using AI with custom model if specified
+        print("AI is analyzing the page structure...")
+        
+        # Use custom model configuration if provided
+        if model_name:
+            model_config = self.load_model_config(model_name)
+            if model_config:
+                llm_config = LLMConfig(
+                    provider=model_config.provider,
+                    api_token=model_config.api_token
+                )
+                print(f"Using custom model: {model_name}")
+            else:
+                raise ValueError(f"Model configuration '{model_name}' not found. Please add it from the Models page.")
+        else:
+            # Require a model to be specified
+            raise ValueError("No model specified. Please select a model from the dropdown or add one from the Models page.")
+        
+        schema = JsonCssExtractionStrategy.generate_schema(
+            html=html,
+            llm_config=llm_config,
+            query=query
+        )
+        
+        # Step 3: Cache the generated schema
+        print(f"Schema generated and cached: {json.dumps(schema, indent=2)}")
+        with open(schema_path, "w") as f:
+            json.dump(schema, f, indent=2)
+        
+        return schema
+    
+    def _generate_llm_schema(self, query: str, llm_config: LLMConfig) -> Dict[str, Any]:
+        """
+        Generate a schema for a given query using a custom LLM model.
+        
+        Args:
+            query: Plain English description of what data to extract
+            model_config: Model configuration to use
+        """
+        # ask the model to generate a schema for the given query in the form of a json.
+        prompt = f"""
+        IDENTIFY THE FIELDS FOR EXTRACTION MENTIONED IN THE QUERY and GENERATE A JSON SCHEMA FOR THE FIELDS.
+        eg.
+        {{
+            "name": "str",  
+            "age": "str",
+            "email": "str",
+            "product_name": "str",
+            "product_price": "str",
+            "product_description": "str",
+            "product_image": "str",
+            "product_url": "str",
+            "product_rating": "str",
+            "product_reviews": "str",
+        }}
+        Here is the query:
+        {query}
+        IMPORTANT:
+        THE RESULT SHOULD BE A JSON OBJECT.
+        MAKE SURE THE NUMBER OF FIELDS IN THE RESULT MATCH THE NUMBER OF FIELDS IN THE QUERY.
+        THE RESULT SHOULD BE A JSON OBJECT.
+        """
+        response = completion(
+            model=llm_config.provider,
+            messages=[{"role": "user", "content": prompt}],
+            api_key=llm_config.api_token,
+            result_type="json"
+        )
+
+        return response.json()["choices"][0]["message"]["content"]
+    async def scrape_data_with_llm(self, url: str, query: str, model_name: Optional[str] = None) -> Dict[str, Any]:
+        """
+        Scrape structured data from any website using a custom LLM model.
+        
+        Args:
+            url: The website URL to scrape
+            query: Plain English description of what data to extract
+            model_name: Name of saved model configuration to use
+        """
+
+        if model_name:
+            model_config = self.load_model_config(model_name)
+            if model_config:
+                llm_config = LLMConfig(
+                    provider=model_config.provider,
+                    api_token=model_config.api_token
+                )
+                print(f"Using custom model: {model_name}")
+            else:
+                raise ValueError(f"Model configuration '{model_name}' not found. Please add it from the Models page.")
+        else:
+            # Require a model to be specified
+            raise ValueError("No model specified. Please select a model from the dropdown or add one from the Models page.")
+
+        query += """\n  
+        IMPORTANT:
+        THE RESULT SHOULD BE A JSON OBJECT WITH THE ONLY THE FIELDS MENTIONED IN THE QUERY.
+        MAKE SURE THE NUMBER OF FIELDS IN THE RESULT MATCH THE NUMBER OF FIELDS IN THE QUERY.
+        THE RESULT SHOULD BE A JSON OBJECT.
+        """
+
+        schema = self._generate_llm_schema(query, llm_config)
+
+        print(f"Schema: {schema}")
+
+        llm_extraction_strategy = LLMExtractionStrategy(
+            llm_config=llm_config,
+            instruction=query,
+            result_type="json",
+            schema=schema
+        )
+
+        async with AsyncWebCrawler() as crawler:
+            result = await crawler.arun(
+                url=url,
+                config=CrawlerRunConfig(
+                    cache_mode=CacheMode.BYPASS,
+                    simulate_user=True,
+                    extraction_strategy=llm_extraction_strategy,
+                )
+            )
+        extracted_data = result.extracted_content
+        if isinstance(extracted_data, str):
+                try:
+                    extracted_data = json.loads(extracted_data)
+                except json.JSONDecodeError:
+                    # If it's not valid JSON, keep it as string
+                    pass
+            
+        return {
+                "url": url,
+                "query": query,
+                "extracted_data": extracted_data,
+                "timestamp": result.timestamp if hasattr(result, 'timestamp') else None
+            }
+        
+    async def scrape_data(self, url: str, query: str, model_name: Optional[str] = None) -> Dict[str, Any]:
+        """
+        Main method to scrape structured data from any website.
+        
+        Args:
+            url: The website URL to scrape
+            query: Plain English description of what data to extract
+            model_name: Name of saved model configuration to use
+            
+        Returns:
+            Structured data extracted from the website
+        """
+        # Step 1: Generate or load schema (reverse-engineer the site)
+        schema = await self._load_or_generate_schema(url=url, query=query, model_name=model_name)
+        
+        # Step 2: Deploy custom high-speed scraper
+        print(f"Deploying custom scraper for {url}")
+        browser_config = BrowserConfig(headless=True)
+        
+        async with AsyncWebCrawler(config=browser_config) as crawler:
+            run_config = CrawlerRunConfig(
+                extraction_strategy=JsonCssExtractionStrategy(schema=schema),
+            )
+            result = await crawler.arun(url=url, config=run_config)
+            
+            # Step 3: Return structured data
+            # Parse extracted_content if it's a JSON string
+            extracted_data = result.extracted_content
+            if isinstance(extracted_data, str):
+                try:
+                    extracted_data = json.loads(extracted_data)
+                except json.JSONDecodeError:
+                    # If it's not valid JSON, keep it as string
+                    pass
+            
+            return {
+                "url": url,
+                "query": query,
+                "extracted_data": extracted_data,
+                "schema_used": schema,
+                "timestamp": result.timestamp if hasattr(result, 'timestamp') else None
+            }
+    
+    async def get_cached_schemas(self) -> Dict[str, str]:
+        """Get list of cached schemas."""
+        schemas = {}
+        for filename in os.listdir(self.schemas_dir):
+            if filename.endswith('.json'):
+                schema_key = filename[:-5]  # Remove .json extension
+                schemas[schema_key] = filename
+        return schemas
+    
+    def clear_cache(self):
+        """Clear all cached schemas."""
+        import shutil
+        if os.path.exists(self.schemas_dir):
+            shutil.rmtree(self.schemas_dir)
+        os.makedirs(self.schemas_dir, exist_ok=True)
+        print("Schema cache cleared")
+
+# Convenience function for simple usage
+async def scrape_website(url: str, query: str, model_name: Optional[str] = None) -> Dict[str, Any]:
+    """
+    Simple function to scrape any website with plain English instructions.
+    
+    Args:
+        url: Website URL
+        query: Plain English description of what data to extract
+        model_name: Name of saved model configuration to use
+        
+    Returns:
+        Extracted structured data
+    """
+    agent = WebScraperAgent()
+    return await agent.scrape_data(url, query, model_name)
+
+async def scrape_website_with_llm(url: str, query: str, model_name: Optional[str] = None):
+    """
+    Scrape structured data from any website using a custom LLM model.
+    
+    Args:
+        url: The website URL to scrape
+        query: Plain English description of what data to extract
+        model_name: Name of saved model configuration to use
+    """
+    agent = WebScraperAgent()
+    return await agent.scrape_data_with_llm(url, query, model_name)

docs/md_v2/advanced/proxy-security.md

@@ -7,13 +7,13 @@ Simple proxy configuration with `BrowserConfig`:
 ```python
 from crawl4ai.async_configs import BrowserConfig
 
-# Using proxy URL
-browser_config = BrowserConfig(proxy="http://proxy.example.com:8080")
+# Using HTTP proxy
+browser_config = BrowserConfig(proxy_config={"server": "http://proxy.example.com:8080"})
 async with AsyncWebCrawler(config=browser_config) as crawler:
     result = await crawler.arun(url="https://example.com")
 
 # Using SOCKS proxy
-browser_config = BrowserConfig(proxy="socks5://proxy.example.com:1080")
+browser_config = BrowserConfig(proxy_config={"server": "socks5://proxy.example.com:1080"})
 async with AsyncWebCrawler(config=browser_config) as crawler:
     result = await crawler.arun(url="https://example.com")
 ```
@@ -25,7 +25,11 @@ Use an authenticated proxy with `BrowserConfig`:
 ```python
 from crawl4ai.async_configs import BrowserConfig
 
-browser_config = BrowserConfig(proxy="http://[username]:[password]@[host]:[port]")
+browser_config = BrowserConfig(proxy_config={
+    "server": "http://[host]:[port]",
+    "username": "[username]",
+    "password": "[password]",
+})
 async with AsyncWebCrawler(config=browser_config) as crawler:
     result = await crawler.arun(url="https://example.com")
 ```

docs/md_v2/api/parameters.md

@@ -23,7 +23,7 @@ browser_cfg = BrowserConfig(
 | **`headless`**        | `bool` (default: `True`)               | Headless means no visible UI. `False` is handy for debugging.                                                                         |
 | **`viewport_width`**  | `int` (default: `1080`)                | Initial page width (in px). Useful for testing responsive layouts.                                                                    |
 | **`viewport_height`** | `int` (default: `600`)                 | Initial page height (in px).                                                                                                          |
-| **`proxy`**           | `str` (default: `None`)                | Single-proxy URL if you want all traffic to go through it, e.g. `"http://user:pass@proxy:8080"`.                                      |
+| **`proxy`**           | `str` (deprecated)                      | Deprecated. Use `proxy_config` instead. If set, it will be auto-converted internally. |
 | **`proxy_config`**    | `dict` (default: `None`)               | For advanced or multi-proxy needs, specify details like `{"server": "...", "username": "...", ...}`.                                  |
 | **`use_persistent_context`** | `bool` (default: `False`)       | If `True`, uses a **persistent** browser context (keep cookies, sessions across runs). Also sets `use_managed_browser=True`.          |
 | **`user_data_dir`**   | `str or None` (default: `None`)        | Directory to store user data (profiles, cookies). Must be set if you want permanent sessions.                                         |
@@ -155,6 +155,7 @@ If your page is a single-page app with repeated JS updates, set `js_only=True` i
 | **`exclude_external_links`** | `bool` (False)          | Removes all links pointing outside the current domain.                                                                      |
 | **`exclude_social_media_links`** | `bool` (False)      | Strips links specifically to social sites (like Facebook or Twitter).                                                      |
 | **`exclude_domains`**        | `list` ([])             | Provide a custom list of domains to exclude (like `["ads.com", "trackers.io"]`).                                            |
+| **`preserve_https_for_internal_links`** | `bool` (False) | If `True`, preserves HTTPS scheme for internal links even when the server redirects to HTTP. Useful for security-conscious crawling. |
 
 Use these for link-level content filtering (often to keep crawls “internal” or to remove spammy domains).
 

docs/md_v2/core/adaptive-crawling.md

@@ -108,7 +108,19 @@ config = AdaptiveConfig(
     embedding_min_confidence_threshold=0.1  # Stop if completely irrelevant
 )
 
-# With custom embedding provider (e.g., OpenAI)
+# With custom LLM provider for query expansion (recommended)
+from crawl4ai import LLMConfig
+
+config = AdaptiveConfig(
+    strategy="embedding",
+    embedding_llm_config=LLMConfig(
+        provider='openai/text-embedding-3-small',
+        api_token='your-api-key',
+        temperature=0.7
+    )
+)
+
+# Alternative: Dictionary format (backward compatible)
 config = AdaptiveConfig(
     strategy="embedding",
     embedding_llm_config={

docs/md_v2/core/deep-crawling.md

@@ -472,6 +472,17 @@ Note that for BestFirstCrawlingStrategy, score_threshold is not needed since pag
 
 5.**Balance breadth vs. depth.** Choose your strategy wisely - BFS for comprehensive coverage, DFS for deep exploration, BestFirst for focused relevance-based crawling.
 
+6.**Preserve HTTPS for security.** If crawling HTTPS sites that redirect to HTTP, use `preserve_https_for_internal_links=True` to maintain secure connections:
+
+```python
+config = CrawlerRunConfig(
+    deep_crawl_strategy=BFSDeepCrawlStrategy(max_depth=2),
+    preserve_https_for_internal_links=True  # Keep HTTPS even if server redirects to HTTP
+)
+```
+
+This is especially useful for security-conscious crawling or when dealing with sites that support both protocols.
+
 ---
 
 ## 10. Summary & Next Steps

pyproject.toml

@@ -7,7 +7,7 @@ name = "Crawl4AI"
 dynamic = ["version"]
 description = "🚀🤖 Crawl4AI: Open-source LLM Friendly Web Crawler & scraper"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = "Apache-2.0"
 authors = [
     {name = "Unclecode", email = "unclecode@kidocode.com"}
@@ -36,6 +36,7 @@ dependencies = [
     "PyYAML>=6.0",
     "nltk>=3.9.1",
     "rich>=13.9.4",
+    "cssselect>=1.2.0",
     "httpx>=0.27.2",
     "httpx[http2]>=0.27.2",
     "fake-useragent>=2.0.3",
@@ -51,7 +52,6 @@ classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",

requirements.txt

@@ -24,6 +24,7 @@ psutil>=6.1.1
 PyYAML>=6.0
 nltk>=3.9.1
 rich>=13.9.4
+cssselect>=1.2.0
 chardet>=5.2.0
 brotli>=1.1.0
 httpx[http2]>=0.27.2

setup.py

@@ -56,11 +56,10 @@ setup(
         "Development Status :: 3 - Alpha",
         "Intended Audience :: Developers",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
     ],
-    python_requires=">=3.9",
+    python_requires=">=3.10",
 )

tests/adaptive/test_llm_embedding.py

@@ -0,0 +1,154 @@
+import asyncio
+import os
+from crawl4ai import AsyncWebCrawler, AdaptiveCrawler, AdaptiveConfig, LLMConfig
+
+
+async def test_configuration(name: str, config: AdaptiveConfig, url: str, query: str):
+    """Test a specific configuration"""
+    print(f"\n{'='*60}")
+    print(f"Configuration: {name}")
+    print(f"{'='*60}")
+    
+    async with AsyncWebCrawler(verbose=False) as crawler:
+        adaptive = AdaptiveCrawler(crawler, config)
+        result = await adaptive.digest(start_url=url, query=query)
+        
+        print("\n" + "="*50)
+        print("CRAWL STATISTICS")
+        print("="*50)
+        adaptive.print_stats(detailed=False)
+        
+        # Get the most relevant content found
+        print("\n" + "="*50)
+        print("MOST RELEVANT PAGES")
+        print("="*50)
+        
+        relevant_pages = adaptive.get_relevant_content(top_k=5)
+        for i, page in enumerate(relevant_pages, 1):
+            print(f"\n{i}. {page['url']}")
+            print(f"   Relevance Score: {page['score']:.2%}")
+            
+            # Show a snippet of the content
+            content = page['content'] or ""
+            if content:
+                snippet = content[:200].replace('\n', ' ')
+                if len(content) > 200:
+                    snippet += "..."
+                print(f"   Preview: {snippet}")
+        
+        print(f"\n{'='*50}")
+        print(f"Pages crawled: {len(result.crawled_urls)}")
+        print(f"Final confidence: {adaptive.confidence:.1%}")
+        print(f"Stopped reason: {result.metrics.get('stopped_reason', 'max_pages')}")
+        
+        if result.metrics.get('is_irrelevant', False):
+            print("⚠️  Query detected as irrelevant!")
+        
+        return result
+
+
+async def llm_embedding():
+    """Demonstrate various embedding configurations"""
+    
+    print("EMBEDDING STRATEGY CONFIGURATION EXAMPLES")
+    print("=" * 60)
+    
+    # Base URL and query for testing
+    test_url = "https://docs.python.org/3/library/asyncio.html"
+    
+    openai_llm_config = LLMConfig(
+        provider='openai/text-embedding-3-small',
+        api_token=os.getenv('OPENAI_API_KEY'),
+        temperature=0.7,
+        max_tokens=2000
+    )
+    config_openai = AdaptiveConfig(
+        strategy="embedding",
+        max_pages=10,
+        
+        # Use OpenAI embeddings
+        embedding_llm_config=openai_llm_config,
+        # embedding_llm_config={
+        #     'provider': 'openai/text-embedding-3-small',
+        #     'api_token': os.getenv('OPENAI_API_KEY')
+        # },
+        
+        # OpenAI embeddings are high quality, can be stricter
+        embedding_k_exp=4.0,
+        n_query_variations=12
+    )
+    
+    await test_configuration(
+        "OpenAI Embeddings",
+        config_openai,
+        test_url,
+        # "event-driven architecture patterns"
+        "async await context managers coroutines"
+    )
+    return
+    
+    
+
+async def basic_adaptive_crawling():
+    """Basic adaptive crawling example"""
+    
+    # Initialize the crawler
+    async with AsyncWebCrawler(verbose=True) as crawler:
+        # Create an adaptive crawler with default settings (statistical strategy)
+        adaptive = AdaptiveCrawler(crawler)
+        
+        # Note: You can also use embedding strategy for semantic understanding:
+        # from crawl4ai import AdaptiveConfig
+        # config = AdaptiveConfig(strategy="embedding")
+        # adaptive = AdaptiveCrawler(crawler, config)
+        
+        # Start adaptive crawling
+        print("Starting adaptive crawl for Python async programming information...")
+        result = await adaptive.digest(
+            start_url="https://docs.python.org/3/library/asyncio.html",
+            query="async await context managers coroutines"
+        )
+        
+        # Display crawl statistics
+        print("\n" + "="*50)
+        print("CRAWL STATISTICS")
+        print("="*50)
+        adaptive.print_stats(detailed=False)
+        
+        # Get the most relevant content found
+        print("\n" + "="*50)
+        print("MOST RELEVANT PAGES")
+        print("="*50)
+        
+        relevant_pages = adaptive.get_relevant_content(top_k=5)
+        for i, page in enumerate(relevant_pages, 1):
+            print(f"\n{i}. {page['url']}")
+            print(f"   Relevance Score: {page['score']:.2%}")
+            
+            # Show a snippet of the content
+            content = page['content'] or ""
+            if content:
+                snippet = content[:200].replace('\n', ' ')
+                if len(content) > 200:
+                    snippet += "..."
+                print(f"   Preview: {snippet}")
+        
+        # Show final confidence
+        print(f"\n{'='*50}")
+        print(f"Final Confidence: {adaptive.confidence:.2%}")
+        print(f"Total Pages Crawled: {len(result.crawled_urls)}")
+        print(f"Knowledge Base Size: {len(adaptive.state.knowledge_base)} documents")
+        
+        
+        if adaptive.confidence >= 0.8:
+            print("✓ High confidence - can answer detailed questions about async Python")
+        elif adaptive.confidence >= 0.6:
+            print("~ Moderate confidence - can answer basic questions") 
+        else:
+            print("✗ Low confidence - need more information")
+
+
+
+if __name__ == "__main__":
+    asyncio.run(llm_embedding())
+    # asyncio.run(basic_adaptive_crawling())

tests/async/test_0.4.2_browser_manager.py

@@ -112,7 +112,7 @@ async def test_proxy_settings():
         headless=True,
         verbose=False,
         user_agent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36",
-        proxy="http://127.0.0.1:8080",  # Assuming local proxy server for test
+        proxy_config={"server": "http://127.0.0.1:8080"},  # Assuming local proxy server for test
         use_managed_browser=False,
         use_persistent_context=False,
     ) as crawler:

tests/docker/test_server_requests.py

@@ -143,7 +143,40 @@ class TestCrawlEndpoints:
         assert "<h1>Herman Melville - Moby-Dick</h1>" in result["html"]
         # We don't specify a markdown generator in this test, so don't make assumptions about markdown field
         # It might be null, missing, or populated depending on the server's default behavior
+    async def test_crawl_with_stream_direct(self, async_client: httpx.AsyncClient):
+        """Test that /crawl endpoint handles stream=True directly without redirect."""
+        payload = {
+            "urls": [SIMPLE_HTML_URL],
+            "browser_config": {
+                "type": "BrowserConfig",
+                "params": {
+                    "headless": True,
+                }
+            },
+            "crawler_config": {
+                "type": "CrawlerRunConfig", 
+                "params": {
+                    "stream": True,  # Set stream to True for direct streaming
+                    "screenshot": False,
+                    "cache_mode": CacheMode.BYPASS.value
+                }
+            }
+        }
 
+        # Send a request to the /crawl endpoint - should handle streaming directly
+        async with async_client.stream("POST", "/crawl", json=payload) as response:
+            assert response.status_code == 200
+            assert response.headers["content-type"] == "application/x-ndjson"
+            assert response.headers.get("x-stream-status") == "active"
+
+            results = await process_streaming_response(response)
+
+            assert len(results) == 1
+            result = results[0]
+            await assert_crawl_result_structure(result)
+            assert result["success"] is True
+            assert result["url"] == SIMPLE_HTML_URL
+            assert "<h1>Herman Melville - Moby-Dick</h1>" in result["html"]
     async def test_simple_crawl_single_url_streaming(self, async_client: httpx.AsyncClient):
         """Test /crawl/stream with a single URL and simple config values."""
         payload = {
@@ -635,7 +668,209 @@ class TestCrawlEndpoints:
             pytest.fail(f"LLM extracted content parsing or validation failed: {e}\nContent: {result['extracted_content']}")
         except Exception as e: # Catch any other unexpected error
             pytest.fail(f"An unexpected error occurred during LLM result processing: {e}\nContent: {result['extracted_content']}")
-            
+
+
+    # 7. Error Handling Tests
+    async def test_invalid_url_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for invalid URLs."""
+        payload = {
+            "urls": ["invalid-url", "https://nonexistent-domain-12345.com"],
+            "browser_config": {"type": "BrowserConfig", "params": {"headless": True}},
+            "crawler_config": {"type": "CrawlerRunConfig", "params": {"cache_mode": CacheMode.BYPASS.value}}
+        }
+        
+        response = await async_client.post("/crawl", json=payload)
+        # Should return 200 with failed results, not 500
+        print(f"Status code: {response.status_code}")
+        print(f"Response: {response.text}")
+        assert response.status_code == 500
+        data = response.json()
+        assert data["detail"].startswith("Crawl request failed:")
+
+    async def test_mixed_success_failure_urls(self, async_client: httpx.AsyncClient):
+        """Test handling of mixed success/failure URLs."""
+        payload = {
+            "urls": [
+                SIMPLE_HTML_URL,  # Should succeed
+                "https://nonexistent-domain-12345.com",  # Should fail
+                "https://invalid-url-with-special-chars-!@#$%^&*()",  # Should fail
+            ],
+            "browser_config": {"type": "BrowserConfig", "params": {"headless": True}},
+            "crawler_config": {
+                "type": "CrawlerRunConfig", 
+                "params": {
+                    "cache_mode": CacheMode.BYPASS.value,
+                    "markdown_generator": {
+                        "type": "DefaultMarkdownGenerator",
+                        "params": {
+                            "content_filter": {
+                                "type": "PruningContentFilter",
+                                "params": {"threshold": 0.5}
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        
+        response = await async_client.post("/crawl", json=payload)
+        assert response.status_code == 200
+        data = response.json()
+        assert data["success"] is True
+        assert len(data["results"]) == 3
+        
+        success_count = 0
+        failure_count = 0
+        
+        for result in data["results"]:
+            if result["success"]:
+                success_count += 1
+            else:
+                failure_count += 1
+                assert "error_message" in result
+                assert len(result["error_message"]) > 0
+                
+        assert success_count >= 1  # At least one should succeed
+        assert failure_count >= 1  # At least one should fail
+
+    async def test_streaming_mixed_urls(self, async_client: httpx.AsyncClient):
+        """Test streaming with mixed success/failure URLs."""
+        payload = {
+            "urls": [
+                SIMPLE_HTML_URL,  # Should succeed
+                "https://nonexistent-domain-12345.com",  # Should fail
+            ],
+            "browser_config": {"type": "BrowserConfig", "params": {"headless": True}},
+            "crawler_config": {
+                "type": "CrawlerRunConfig", 
+                "params": {
+                    "stream": True,
+                    "cache_mode": CacheMode.BYPASS.value
+                }
+            }
+        }
+        
+        async with async_client.stream("POST", "/crawl/stream", json=payload) as response:
+            response.raise_for_status()
+            results = await process_streaming_response(response)
+        
+        assert len(results) == 2
+        
+        success_count = 0
+        failure_count = 0
+        
+        for result in results:
+            if result["success"]:
+                success_count += 1
+                assert result["url"] == SIMPLE_HTML_URL
+            else:
+                failure_count += 1
+                assert "error_message" in result
+                assert result["error_message"] is not None
+        
+        assert success_count == 1
+        assert failure_count == 1
+
+    async def test_markdown_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for markdown endpoint."""
+        # Test invalid URL
+        invalid_payload = {"url": "invalid-url", "f": "fit"}
+        response = await async_client.post("/md", json=invalid_payload)
+        # Should return 400 for invalid URL format
+        assert response.status_code == 400
+        
+        # Test non-existent URL
+        nonexistent_payload = {"url": "https://nonexistent-domain-12345.com", "f": "fit"}
+        response = await async_client.post("/md", json=nonexistent_payload)
+        # Should return 500 for crawl failure
+        assert response.status_code == 500
+
+    async def test_html_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for HTML endpoint."""
+        # Test invalid URL
+        invalid_payload = {"url": "invalid-url"}
+        response = await async_client.post("/html", json=invalid_payload)
+        # Should return 500 for crawl failure
+        assert response.status_code == 500
+
+    async def test_screenshot_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for screenshot endpoint."""
+        # Test invalid URL
+        invalid_payload = {"url": "invalid-url"}
+        response = await async_client.post("/screenshot", json=invalid_payload)
+        # Should return 500 for crawl failure
+        assert response.status_code == 500
+
+    async def test_pdf_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for PDF endpoint."""
+        # Test invalid URL
+        invalid_payload = {"url": "invalid-url"}
+        response = await async_client.post("/pdf", json=invalid_payload)
+        # Should return 500 for crawl failure
+        assert response.status_code == 500
+
+    async def test_execute_js_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for execute_js endpoint."""
+        # Test invalid URL
+        invalid_payload = {"url": "invalid-url", "scripts": ["return document.title;"]}
+        response = await async_client.post("/execute_js", json=invalid_payload)
+        # Should return 500 for crawl failure
+        assert response.status_code == 500
+
+    async def test_llm_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for LLM endpoint."""
+        # Test missing query parameter
+        response = await async_client.get("/llm/https://example.com")
+        assert response.status_code == 422  # FastAPI validation error, not 400
+        
+        # Test invalid URL
+        response = await async_client.get("/llm/invalid-url?q=test")
+        # Should return 500 for crawl failure
+        assert response.status_code == 500
+
+    async def test_ask_endpoint_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for ask endpoint."""
+        # Test invalid context_type
+        response = await async_client.get("/ask?context_type=invalid")
+        assert response.status_code == 422  # Validation error
+        
+        # Test invalid score_ratio
+        response = await async_client.get("/ask?score_ratio=2.0")  # > 1.0
+        assert response.status_code == 422  # Validation error
+        
+        # Test invalid max_results
+        response = await async_client.get("/ask?max_results=0")  # < 1
+        assert response.status_code == 422  # Validation error
+
+    async def test_config_dump_error_handling(self, async_client: httpx.AsyncClient):
+        """Test error handling for config dump endpoint."""
+        # Test invalid code
+        invalid_payload = {"code": "invalid_code"}
+        response = await async_client.post("/config/dump", json=invalid_payload)
+        assert response.status_code == 400
+        
+        # Test nested function calls (not allowed)
+        nested_payload = {"code": "CrawlerRunConfig(BrowserConfig())"}
+        response = await async_client.post("/config/dump", json=nested_payload)
+        assert response.status_code == 400
+
+    async def test_malformed_request_handling(self, async_client: httpx.AsyncClient):
+        """Test handling of malformed requests."""
+        # Test missing required fields
+        malformed_payload = {"urls": []}  # Missing browser_config and crawler_config
+        response = await async_client.post("/crawl", json=malformed_payload)
+        print(f"Response: {response.text}")
+        assert response.status_code == 422  # Validation error
+        
+        # Test empty URLs list
+        empty_urls_payload = {
+            "urls": [],
+            "browser_config": {"type": "BrowserConfig", "params": {}},
+            "crawler_config": {"type": "CrawlerRunConfig", "params": {}}
+        }
+        response = await async_client.post("/crawl", json=empty_urls_payload)
+        assert response.status_code == 422  # "At least one URL required"
+
 if __name__ == "__main__":
     # Define arguments for pytest programmatically
     # -v: verbose output

tests/general/test_bff_scoring.py

@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+"""
+Simple test to verify BestFirstCrawlingStrategy fixes.
+This test crawls a real website and shows that:
+1. Higher-scoring pages are crawled first (priority queue fix)
+2. Links are scored before truncation (link discovery fix)
+"""
+
+import asyncio
+from crawl4ai import AsyncWebCrawler, BrowserConfig, CrawlerRunConfig
+from crawl4ai.deep_crawling import BestFirstCrawlingStrategy
+from crawl4ai.deep_crawling.scorers import KeywordRelevanceScorer
+
+async def test_best_first_strategy():
+    """Test BestFirstCrawlingStrategy with keyword scoring"""
+    
+    print("=" * 70)
+    print("Testing BestFirstCrawlingStrategy with Real URL")
+    print("=" * 70)
+    print("\nThis test will:")
+    print("1. Crawl Python.org documentation")
+    print("2. Score pages based on keywords: 'tutorial', 'guide', 'reference'")
+    print("3. Show that higher-scoring pages are crawled first")
+    print("-" * 70)
+    
+    # Create a keyword scorer that prioritizes tutorial/guide pages
+    scorer = KeywordRelevanceScorer(
+        keywords=["tutorial", "guide", "reference", "documentation"],
+        weight=1.0,
+        case_sensitive=False
+    )
+    
+    # Create the strategy with scoring
+    strategy = BestFirstCrawlingStrategy(
+        max_depth=2,          # Crawl 2 levels deep
+        max_pages=10,         # Limit to 10 pages total
+        url_scorer=scorer,    # Use keyword scoring
+        include_external=False  # Only internal links
+    )
+    
+    # Configure browser and crawler
+    browser_config = BrowserConfig(
+        headless=True,    # Run in background
+        verbose=False     # Reduce output noise
+    )
+    
+    crawler_config = CrawlerRunConfig(
+        deep_crawl_strategy=strategy,
+        verbose=False
+    )
+    
+    print("\nStarting crawl of https://docs.python.org/3/")
+    print("Looking for pages with keywords: tutorial, guide, reference, documentation")
+    print("-" * 70)
+    
+    crawled_urls = []
+    
+    async with AsyncWebCrawler(config=browser_config) as crawler:
+        # Crawl and collect results
+        results = await crawler.arun(
+            url="https://docs.python.org/3/",
+            config=crawler_config
+        )
+        
+        # Process results
+        if isinstance(results, list):
+            for result in results:
+                score = result.metadata.get('score', 0) if result.metadata else 0
+                depth = result.metadata.get('depth', 0) if result.metadata else 0
+                crawled_urls.append({
+                    'url': result.url,
+                    'score': score,
+                    'depth': depth,
+                    'success': result.success
+                })
+    
+    print("\n" + "=" * 70)
+    print("CRAWL RESULTS (in order of crawling)")
+    print("=" * 70)
+    
+    for i, item in enumerate(crawled_urls, 1):
+        status = "✓" if item['success'] else "✗"
+        # Highlight high-scoring pages
+        if item['score'] > 0.5:
+            print(f"{i:2}. [{status}] Score: {item['score']:.2f} | Depth: {item['depth']} | {item['url']}")
+            print(f"     ^ HIGH SCORE - Contains keywords!")
+        else:
+            print(f"{i:2}. [{status}] Score: {item['score']:.2f} | Depth: {item['depth']} | {item['url']}")
+    
+    print("\n" + "=" * 70)
+    print("ANALYSIS")
+    print("=" * 70)
+    
+    # Check if higher scores appear early in the crawl
+    scores = [item['score'] for item in crawled_urls[1:]]  # Skip initial URL
+    high_score_indices = [i for i, s in enumerate(scores) if s > 0.3]
+    
+    if high_score_indices and high_score_indices[0] < len(scores) / 2:
+        print("✅ SUCCESS: Higher-scoring pages (with keywords) were crawled early!")
+        print("   This confirms the priority queue fix is working.")
+    else:
+        print("⚠️  Check the crawl order above - higher scores should appear early")
+    
+    # Show score distribution
+    print(f"\nScore Statistics:")
+    print(f"  - Total pages crawled: {len(crawled_urls)}")
+    print(f"  - Average score: {sum(item['score'] for item in crawled_urls) / len(crawled_urls):.2f}")
+    print(f"  - Max score: {max(item['score'] for item in crawled_urls):.2f}")
+    print(f"  - Pages with keywords: {sum(1 for item in crawled_urls if item['score'] > 0.3)}")
+    
+    print("\n" + "=" * 70)
+    print("TEST COMPLETE")
+    print("=" * 70)
+
+if __name__ == "__main__":
+    print("\n🔍 BestFirstCrawlingStrategy Simple Test\n")
+    asyncio.run(test_best_first_strategy())

tests/memory/test_docker_config_gen.py

@@ -24,7 +24,7 @@ CASES = [
     # --- BrowserConfig variants ---
     "BrowserConfig()",
     "BrowserConfig(headless=False, extra_args=['--disable-gpu'])",
-    "BrowserConfig(browser_mode='builtin', proxy='http://1.2.3.4:8080')",
+    "BrowserConfig(browser_mode='builtin', proxy_config={'server': 'http://1.2.3.4:8080'})",
 ]
 
 for code in CASES:

tests/proxy/test_proxy_deprecation.py

@@ -0,0 +1,42 @@
+import warnings
+
+import pytest
+
+from crawl4ai.async_configs import BrowserConfig, ProxyConfig
+
+
+def test_browser_config_proxy_string_emits_deprecation_and_autoconverts():
+    warnings.simplefilter("always", DeprecationWarning)
+
+    proxy_str = "23.95.150.145:6114:username:password"
+    with warnings.catch_warnings(record=True) as caught:
+        cfg = BrowserConfig(proxy=proxy_str, headless=True)
+
+    dep_warnings = [w for w in caught if issubclass(w.category, DeprecationWarning)]
+    assert dep_warnings, "Expected DeprecationWarning when using BrowserConfig(proxy=...)"
+
+    assert cfg.proxy is None, "cfg.proxy should be None after auto-conversion"
+    assert isinstance(cfg.proxy_config, ProxyConfig), "cfg.proxy_config should be ProxyConfig instance"
+    assert cfg.proxy_config.username == "username"
+    assert cfg.proxy_config.password == "password"
+    assert cfg.proxy_config.server.startswith("http://")
+    assert cfg.proxy_config.server.endswith(":6114")
+
+
+def test_browser_config_with_proxy_config_emits_no_deprecation():
+    warnings.simplefilter("always", DeprecationWarning)
+
+    with warnings.catch_warnings(record=True) as caught:
+        cfg = BrowserConfig(
+            headless=True,
+            proxy_config={
+                "server": "http://127.0.0.1:8080",
+                "username": "u",
+                "password": "p",
+            },
+        )
+
+    dep_warnings = [w for w in caught if issubclass(w.category, DeprecationWarning)]
+    assert not dep_warnings, "Did not expect DeprecationWarning when using proxy_config"
+    assert cfg.proxy is None
+    assert isinstance(cfg.proxy_config, ProxyConfig)

tests/test_preserve_https_for_internal_links.py

@@ -0,0 +1,175 @@
+#!/usr/bin/env python3
+"""
+Final test and demo for HTTPS preservation feature (Issue #1410)
+
+This demonstrates how the preserve_https_for_internal_links flag
+prevents HTTPS downgrade when servers redirect to HTTP.
+"""
+
+import sys
+import os
+from urllib.parse import urljoin, urlparse
+
+def demonstrate_issue():
+    """Show the problem: HTTPS -> HTTP redirect causes HTTP links"""
+    
+    print("=" * 60)
+    print("DEMONSTRATING THE ISSUE")
+    print("=" * 60)
+    
+    # Simulate what happens during crawling
+    original_url = "https://quotes.toscrape.com/tag/deep-thoughts"
+    redirected_url = "http://quotes.toscrape.com/tag/deep-thoughts/"  # Server redirects to HTTP
+    
+    # Extract a relative link
+    relative_link = "/author/Albert-Einstein"
+    
+    # Standard URL joining uses the redirected (HTTP) base
+    resolved_url = urljoin(redirected_url, relative_link)
+    
+    print(f"Original URL:    {original_url}")
+    print(f"Redirected to:   {redirected_url}")
+    print(f"Relative link:   {relative_link}")
+    print(f"Resolved link:   {resolved_url}")
+    print(f"\n❌ Problem: Link is now HTTP instead of HTTPS!")
+    
+    return resolved_url
+
+def demonstrate_solution():
+    """Show the solution: preserve HTTPS for internal links"""
+    
+    print("\n" + "=" * 60)
+    print("DEMONSTRATING THE SOLUTION")
+    print("=" * 60)
+    
+    # Our normalize_url with HTTPS preservation
+    def normalize_url_with_preservation(href, base_url, preserve_https=False, original_scheme=None):
+        """Normalize URL with optional HTTPS preservation"""
+        
+        # Standard resolution
+        full_url = urljoin(base_url, href.strip())
+        
+        # Preserve HTTPS if requested
+        if preserve_https and original_scheme == 'https':
+            parsed_full = urlparse(full_url)
+            parsed_base = urlparse(base_url)
+            
+            # Only for same-domain links
+            if parsed_full.scheme == 'http' and parsed_full.netloc == parsed_base.netloc:
+                full_url = full_url.replace('http://', 'https://', 1)
+                print(f"  → Preserved HTTPS for {parsed_full.netloc}")
+        
+        return full_url
+    
+    # Same scenario as before
+    original_url = "https://quotes.toscrape.com/tag/deep-thoughts"
+    redirected_url = "http://quotes.toscrape.com/tag/deep-thoughts/"
+    relative_link = "/author/Albert-Einstein"
+    
+    # Without preservation (current behavior)
+    resolved_without = normalize_url_with_preservation(
+        relative_link, redirected_url,
+        preserve_https=False, original_scheme='https'
+    )
+    
+    print(f"\nWithout preservation:")
+    print(f"  Result: {resolved_without}")
+    
+    # With preservation (new feature)
+    resolved_with = normalize_url_with_preservation(
+        relative_link, redirected_url,
+        preserve_https=True, original_scheme='https'
+    )
+    
+    print(f"\nWith preservation (preserve_https_for_internal_links=True):")
+    print(f"  Result: {resolved_with}")
+    print(f"\n✅ Solution: Internal link stays HTTPS!")
+    
+    return resolved_with
+
+def test_edge_cases():
+    """Test important edge cases"""
+    
+    print("\n" + "=" * 60)
+    print("EDGE CASES")
+    print("=" * 60)
+    
+    from urllib.parse import urljoin, urlparse
+    
+    def preserve_https(href, base_url, original_scheme):
+        """Helper to test preservation logic"""
+        full_url = urljoin(base_url, href)
+        
+        if original_scheme == 'https':
+            parsed_full = urlparse(full_url)
+            parsed_base = urlparse(base_url)
+            # Fixed: check for protocol-relative URLs
+            if (parsed_full.scheme == 'http' and 
+                parsed_full.netloc == parsed_base.netloc and
+                not href.strip().startswith('//')):
+                full_url = full_url.replace('http://', 'https://', 1)
+        
+        return full_url
+    
+    test_cases = [
+        # (description, href, base_url, original_scheme, should_be_https)
+        ("External link", "http://other.com/page", "http://example.com", "https", False),
+        ("Already HTTPS", "/page", "https://example.com", "https", True),
+        ("No original HTTPS", "/page", "http://example.com", "http", False),
+        ("Subdomain", "/page", "http://sub.example.com", "https", True),
+        ("Protocol-relative", "//example.com/page", "http://example.com", "https", False),
+    ]
+    
+    for desc, href, base_url, orig_scheme, should_be_https in test_cases:
+        result = preserve_https(href, base_url, orig_scheme)
+        is_https = result.startswith('https://')
+        status = "✅" if is_https == should_be_https else "❌"
+        
+        print(f"\n{status} {desc}:")
+        print(f"  Input: {href} + {base_url}")
+        print(f"  Result: {result}")
+        print(f"  Expected HTTPS: {should_be_https}, Got: {is_https}")
+
+def usage_example():
+    """Show how to use the feature in crawl4ai"""
+    
+    print("\n" + "=" * 60)
+    print("USAGE IN CRAWL4AI")
+    print("=" * 60)
+    
+    print("""
+To enable HTTPS preservation in your crawl4ai code:
+
+```python
+from crawl4ai import AsyncWebCrawler, CrawlerRunConfig
+
+async with AsyncWebCrawler() as crawler:
+    config = CrawlerRunConfig(
+        preserve_https_for_internal_links=True  # Enable HTTPS preservation
+    )
+    
+    result = await crawler.arun(
+        url="https://example.com",
+        config=config
+    )
+    
+    # All internal links will maintain HTTPS even if 
+    # the server redirects to HTTP
+```
+
+This is especially useful for:
+- Sites that redirect HTTPS to HTTP but still support HTTPS
+- Security-conscious crawling where you want to stay on HTTPS
+- Avoiding mixed content issues in downstream processing
+""")
+
+if __name__ == "__main__":
+    # Run all demonstrations
+    demonstrate_issue()
+    demonstrate_solution() 
+    test_edge_cases()
+    usage_example()
+    
+    print("\n" + "=" * 60)
+    print("✅ All tests complete!")
+    print("=" * 60)