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5 Commits

Author SHA1 Message Date
ntohidi
1d1970ae69 docs: Update release notes and docs for v0.7.0 with teh correct parameters and explanations 2025-07-15 11:32:04 +02:00
ntohidi
205df1e330 docs: Fix virtual scroll configuration 2025-07-15 10:29:47 +02:00
ntohidi
2640dc73a5 docs: Enhance session management example for dynamic content crawling with improved JavaScript handling and extraction schema. ref #226 2025-07-15 10:19:29 +02:00
ntohidi
58024755c5 docs: Update adaptive crawling parameters and examples in README and release notes 2025-07-15 10:15:05 +02:00
UncleCode
dd5ee752cf docs: Add missing documentation pages to mkdocs.yml
- Added Adaptive Crawling to Core section
- Added URL Seeding to Core section
- Added Adaptive Strategies to Advanced section
2025-07-12 19:58:26 +08:00
8 changed files with 261 additions and 320 deletions

View File

@@ -523,15 +523,18 @@ async def test_news_crawl():
- **🧠 Adaptive Crawling**: Your crawler now learns and adapts to website patterns automatically:
```python
config = AdaptiveConfig(
confidence_threshold=0.7,
max_history=100,
learning_rate=0.2
confidence_threshold=0.7, # Min confidence to stop crawling
max_depth=5, # Maximum crawl depth
max_pages=20, # Maximum number of pages to crawl
strategy="statistical"
)
result = await crawler.arun(
"https://news.example.com",
config=CrawlerRunConfig(adaptive_config=config)
)
async with AsyncWebCrawler() as crawler:
adaptive_crawler = AdaptiveCrawler(crawler, config)
state = await adaptive_crawler.digest(
start_url="https://news.example.com",
query="latest news content"
)
# Crawler learns patterns and improves extraction over time
```

View File

@@ -10,9 +10,8 @@ Today I'm releasing Crawl4AI v0.7.0—the Adaptive Intelligence Update. This rel
- **Adaptive Crawling**: Your crawler now learns and adapts to website patterns
- **Virtual Scroll Support**: Complete content extraction from infinite scroll pages
- **Link Preview with 3-Layer Scoring**: Intelligent link analysis and prioritization
- **Link Preview with Intelligent Scoring**: Intelligent link analysis and prioritization
- **Async URL Seeder**: Discover thousands of URLs in seconds with intelligent filtering
- **PDF Parsing**: Extract data from PDF documents
- **Performance Optimizations**: Significant speed and memory improvements
## 🧠 Adaptive Crawling: Intelligence Through Pattern Learning
@@ -30,44 +29,34 @@ The Adaptive Crawler maintains a persistent state for each domain, tracking:
- Extraction confidence scores
```python
from crawl4ai import AdaptiveCrawler, AdaptiveConfig, CrawlState
from crawl4ai import AsyncWebCrawler, AdaptiveCrawler, AdaptiveConfig
# Initialize with custom learning parameters
# Initialize with custom adaptive parameters
config = AdaptiveConfig(
confidence_threshold=0.7, # Min confidence to use learned patterns
max_history=100, # Remember last 100 crawls per domain
learning_rate=0.2, # How quickly to adapt to changes
patterns_per_page=3, # Patterns to learn per page type
extraction_strategy='css' # 'css' or 'xpath'
confidence_threshold=0.7, # Min confidence to stop crawling
max_depth=5, # Maximum crawl depth
max_pages=20, # Maximum number of pages to crawl
top_k_links=3, # Number of top links to follow per page
strategy="statistical", # 'statistical' or 'embedding'
coverage_weight=0.4, # Weight for coverage in confidence calculation
consistency_weight=0.3, # Weight for consistency in confidence calculation
saturation_weight=0.3 # Weight for saturation in confidence calculation
)
adaptive_crawler = AdaptiveCrawler(config)
# First crawl - crawler learns the structure
# Initialize adaptive crawler with web crawler
async with AsyncWebCrawler() as crawler:
result = await crawler.arun(
"https://news.example.com/article/12345",
config=CrawlerRunConfig(
adaptive_config=config,
extraction_hints={ # Optional hints to speed up learning
"title": "article h1",
"content": "article .body-content"
}
)
adaptive_crawler = AdaptiveCrawler(crawler, config)
# Crawl and learn patterns
state = await adaptive_crawler.digest(
start_url="https://news.example.com/article/12345",
query="latest news articles and content"
)
# Crawler identifies and stores patterns
if result.success:
state = adaptive_crawler.get_state("news.example.com")
print(f"Learned {len(state.patterns)} patterns")
print(f"Confidence: {state.avg_confidence:.2%}")
# Subsequent crawls - uses learned patterns
result2 = await crawler.arun(
"https://news.example.com/article/67890",
config=CrawlerRunConfig(adaptive_config=config)
)
# Automatically extracts using learned patterns!
# Access results and confidence
print(f"Confidence Level: {adaptive_crawler.confidence:.0%}")
print(f"Pages Crawled: {len(state.crawled_urls)}")
print(f"Knowledge Base: {len(adaptive_crawler.state.knowledge_base)} documents")
```
**Expected Real-World Impact:**
@@ -92,9 +81,7 @@ twitter_config = VirtualScrollConfig(
container_selector="[data-testid='primaryColumn']",
scroll_count=20, # Number of scrolls
scroll_by="container_height", # Smart scrolling by container size
wait_after_scroll=1.0, # Let content load
capture_method="incremental", # Capture new content on each scroll
deduplicate=True # Remove duplicate elements
wait_after_scroll=1.0 # Let content load
)
# For e-commerce product grids (Instagram style)
@@ -102,8 +89,7 @@ grid_config = VirtualScrollConfig(
container_selector="main .product-grid",
scroll_count=30,
scroll_by=800, # Fixed pixel scrolling
wait_after_scroll=1.5, # Images need time
stop_on_no_change=True # Smart stopping
wait_after_scroll=1.5 # Images need time
)
# For news feeds with lazy loading
@@ -111,9 +97,7 @@ news_config = VirtualScrollConfig(
container_selector=".article-feed",
scroll_count=50,
scroll_by="page_height", # Viewport-based scrolling
wait_after_scroll=0.5,
wait_for_selector=".article-card", # Wait for specific elements
timeout=30000 # Max 30 seconds total
wait_after_scroll=0.5 # Wait for content to load
)
# Use it in your crawl
@@ -160,29 +144,17 @@ async with AsyncWebCrawler() as crawler:
### The Three-Layer Scoring System
```python
from crawl4ai import LinkPreviewConfig
from crawl4ai import LinkPreviewConfig, CrawlerRunConfig, CacheMode
# Configure intelligent link analysis
link_config = LinkPreviewConfig(
# What to analyze
include_internal=True,
include_external=True,
max_links=100, # Analyze top 100 links
# Relevance scoring
query="machine learning tutorials", # Your interest
score_threshold=0.3, # Minimum relevance score
# Performance
concurrent_requests=10, # Parallel processing
timeout_per_link=5000, # 5s per link
# Advanced scoring weights
scoring_weights={
"intrinsic": 0.3, # Link quality indicators
"contextual": 0.5, # Relevance to query
"popularity": 0.2 # Link prominence
}
include_external=False,
max_links=10,
concurrency=5,
query="python tutorial", # For contextual scoring
score_threshold=0.3,
verbose=True
)
# Use in your crawl
@@ -190,35 +162,51 @@ result = await crawler.arun(
"https://tech-blog.example.com",
config=CrawlerRunConfig(
link_preview_config=link_config,
score_links=True
score_links=True, # Enable intrinsic scoring
cache_mode=CacheMode.BYPASS
)
)
# Access scored and sorted links
for link in result.links["internal"][:10]: # Top 10 internal links
print(f"Score: {link['total_score']:.3f}")
print(f" Intrinsic: {link['intrinsic_score']:.1f}/10") # Position, attributes
print(f" Contextual: {link['contextual_score']:.1f}/1") # Relevance to query
print(f" URL: {link['href']}")
print(f" Title: {link['head_data']['title']}")
print(f" Description: {link['head_data']['meta']['description'][:100]}...")
if result.success and result.links:
# Get scored links
internal_links = result.links.get("internal", [])
scored_links = [l for l in internal_links if l.get("total_score")]
scored_links.sort(key=lambda x: x.get("total_score", 0), reverse=True)
# Create a scoring table
table = Table(title="Link Scoring Results", box=box.ROUNDED)
table.add_column("Link Text", style="cyan", width=40)
table.add_column("Intrinsic Score", justify="center")
table.add_column("Contextual Score", justify="center")
table.add_column("Total Score", justify="center", style="bold green")
for link in scored_links[:5]:
text = link.get('text', 'No text')[:40]
table.add_row(
text,
f"{link.get('intrinsic_score', 0):.1f}/10",
f"{link.get('contextual_score', 0):.2f}/1",
f"{link.get('total_score', 0):.3f}"
)
console.print(table)
```
**Scoring Components:**
1. **Intrinsic Score (0-10)**: Based on link quality indicators
1. **Intrinsic Score**: Based on link quality indicators
- Position on page (navigation, content, footer)
- Link attributes (rel, title, class names)
- Anchor text quality and length
- URL structure and depth
2. **Contextual Score (0-1)**: Relevance to your query
- Semantic similarity using embeddings
2. **Contextual Score**: Relevance to your query using BM25 algorithm
- Keyword matching in link text and title
- Meta description analysis
- Content preview scoring
3. **Total Score**: Weighted combination for final ranking
3. **Total Score**: Combined score for final ranking
**Expected Real-World Impact:**
- **Research Efficiency**: Find relevant papers 10x faster by following only high-score links
@@ -240,53 +228,53 @@ from crawl4ai import AsyncUrlSeeder, SeedingConfig
# Basic discovery - find all product pages
seeder_config = SeedingConfig(
# Discovery sources
source="sitemap+cc", # Sitemap + Common Crawl
source="cc+sitemap", # Sitemap + Common Crawl
# Filtering
pattern="*/product/*", # URL pattern matching
ignore_patterns=["*/reviews/*", "*/questions/*"],
# Validation
live_check=True, # Verify URLs are alive
max_urls=5000, # Stop at 5000 URLs
max_urls=50, # Stop at 50 URLs
# Performance
concurrency=100, # Parallel requests
hits_per_sec=10 # Rate limiting
concurrency=100, # Maximum concurrent requests for live checks/head extraction
hits_per_sec=10 # Rate limit in requests per second to avoid overwhelming servers
)
seeder = AsyncUrlSeeder(seeder_config)
urls = await seeder.discover("https://shop.example.com")
async with AsyncUrlSeeder() as seeder:
console.print("Discovering URLs from Python docs...")
urls = await seeder.urls("docs.python.org", seeding_config)
console.print(f"\n✓ Discovered {len(urls)} URLs")
# Advanced: Relevance-based discovery
research_config = SeedingConfig(
source="crawl+sitemap", # Deep crawl + sitemap
source="sitemap+cc", # Sitemap + Common Crawl
pattern="*/blog/*", # Blog posts only
# Content relevance
extract_head=True, # Get meta tags
query="quantum computing tutorials",
scoring_method="bm25", # Or "semantic" (coming soon)
scoring_method="bm25", # BM25 scoring method
score_threshold=0.4, # High relevance only
# Smart filtering
filter_nonsense_urls=True, # Remove .xml, .txt, etc.
min_content_length=500, # Skip thin content
force=True # Bypass cache
)
# Discover with progress tracking
discovered = []
async for batch in seeder.discover_iter("https://physics-blog.com", research_config):
discovered.extend(batch)
print(f"Found {len(discovered)} relevant URLs so far...")
async with AsyncUrlSeeder() as seeder:
discovered = await seeder.urls("https://physics-blog.com", research_config)
console.print(f"\n✓ Discovered {len(discovered)} URLs")
# Results include scores and metadata
for url_data in discovered[:5]:
print(f"URL: {url_data['url']}")
print(f"Score: {url_data['score']:.3f}")
print(f"Title: {url_data['title']}")
print(f"Score: {url_data['relevance_score']:.3f}")
print(f"Title: {url_data['head_data']['title']}")
```
**Discovery Methods:**
@@ -309,35 +297,18 @@ This release includes significant performance improvements through optimized res
### What We Optimized
```python
# Before v0.7.0 (slow)
# Optimized crawling with v0.7.0 improvements
results = []
for url in urls:
result = await crawler.arun(url)
results.append(result)
# After v0.7.0 (fast)
# Automatic batching and connection pooling
results = await crawler.arun_batch(
urls,
config=CrawlerRunConfig(
# New performance options
batch_size=10, # Process 10 URLs concurrently
reuse_browser=True, # Keep browser warm
eager_loading=False, # Load only what's needed
streaming_extraction=True, # Stream large extractions
# Optimized defaults
wait_until="domcontentloaded", # Faster than networkidle
exclude_external_resources=True, # Skip third-party assets
block_ads=True # Ad blocking built-in
result = await crawler.arun(
url,
config=CrawlerRunConfig(
# Performance optimizations
wait_until="domcontentloaded", # Faster than networkidle
cache_mode=CacheMode.ENABLED # Enable caching
)
)
)
# Memory-efficient streaming for large crawls
async for result in crawler.arun_stream(large_url_list):
# Process results as they complete
await process_result(result)
# Memory is freed after each iteration
results.append(result)
```
**Performance Gains:**
@@ -347,24 +318,6 @@ async for result in crawler.arun_stream(large_url_list):
- **Memory Usage**: 60% reduction with streaming processing
- **Concurrent Crawls**: Handle 5x more parallel requests
## 📄 PDF Support
PDF extraction is now natively supported in Crawl4AI.
```python
# Extract data from PDF documents
result = await crawler.arun(
"https://example.com/report.pdf",
config=CrawlerRunConfig(
pdf_extraction=True,
extraction_strategy=JsonCssExtractionStrategy({
# Works on converted PDF structure
"title": {"selector": "h1", "type": "text"},
"sections": {"selector": "h2", "type": "list"}
})
)
)
```
## 🔧 Important Changes

View File

@@ -49,46 +49,75 @@ from crawl4ai import JsonCssExtractionStrategy
from crawl4ai.cache_context import CacheMode
async def crawl_dynamic_content():
async with AsyncWebCrawler() as crawler:
session_id = "github_commits_session"
url = "https://github.com/microsoft/TypeScript/commits/main"
all_commits = []
url = "https://github.com/microsoft/TypeScript/commits/main"
session_id = "wait_for_session"
all_commits = []
# Define extraction schema
schema = {
"name": "Commit Extractor",
"baseSelector": "li.Box-sc-g0xbh4-0",
"fields": [{
"name": "title", "selector": "h4.markdown-title", "type": "text"
}],
}
extraction_strategy = JsonCssExtractionStrategy(schema)
js_next_page = """
const commits = document.querySelectorAll('li[data-testid="commit-row-item"] h4');
if (commits.length > 0) {
window.lastCommit = commits[0].textContent.trim();
}
const button = document.querySelector('a[data-testid="pagination-next-button"]');
if (button) {button.click(); console.log('button clicked') }
"""
# JavaScript and wait configurations
js_next_page = """document.querySelector('a[data-testid="pagination-next-button"]').click();"""
wait_for = """() => document.querySelectorAll('li.Box-sc-g0xbh4-0').length > 0"""
# Crawl multiple pages
wait_for = """() => {
const commits = document.querySelectorAll('li[data-testid="commit-row-item"] h4');
if (commits.length === 0) return false;
const firstCommit = commits[0].textContent.trim();
return firstCommit !== window.lastCommit;
}"""
schema = {
"name": "Commit Extractor",
"baseSelector": "li[data-testid='commit-row-item']",
"fields": [
{
"name": "title",
"selector": "h4 a",
"type": "text",
"transform": "strip",
},
],
}
extraction_strategy = JsonCssExtractionStrategy(schema, verbose=True)
browser_config = BrowserConfig(
verbose=True,
headless=False,
)
async with AsyncWebCrawler(config=browser_config) as crawler:
for page in range(3):
config = CrawlerRunConfig(
url=url,
crawler_config = CrawlerRunConfig(
session_id=session_id,
css_selector="li[data-testid='commit-row-item']",
extraction_strategy=extraction_strategy,
js_code=js_next_page if page > 0 else None,
wait_for=wait_for if page > 0 else None,
js_only=page > 0,
cache_mode=CacheMode.BYPASS
cache_mode=CacheMode.BYPASS,
capture_console_messages=True,
)
result = await crawler.arun(config=config)
if result.success:
result = await crawler.arun(url=url, config=crawler_config)
if result.console_messages:
print(f"Page {page + 1} console messages:", result.console_messages)
if result.extracted_content:
# print(f"Page {page + 1} result:", result.extracted_content)
commits = json.loads(result.extracted_content)
all_commits.extend(commits)
print(f"Page {page + 1}: Found {len(commits)} commits")
else:
print(f"Page {page + 1}: No content extracted")
print(f"Successfully crawled {len(all_commits)} commits across 3 pages")
# Clean up session
await crawler.crawler_strategy.kill_session(session_id)
return all_commits
```
---

View File

@@ -91,13 +91,12 @@ async def crawl_twitter_timeline():
wait_after_scroll=1.0 # Twitter needs time to load
)
browser_config = BrowserConfig(headless=True) # Set to False to watch it work
config = CrawlerRunConfig(
virtual_scroll_config=virtual_config,
# Optional: Set headless=False to watch it work
# browser_config=BrowserConfig(headless=False)
virtual_scroll_config=virtual_config
)
async with AsyncWebCrawler() as crawler:
async with AsyncWebCrawler(config=browser_config) as crawler:
result = await crawler.arun(
url="https://twitter.com/search?q=AI",
config=config
@@ -200,7 +199,7 @@ Use **scan_full_page** when:
Virtual Scroll works seamlessly with extraction strategies:
```python
from crawl4ai import LLMExtractionStrategy
from crawl4ai import LLMExtractionStrategy, LLMConfig
# Define extraction schema
schema = {
@@ -222,7 +221,7 @@ config = CrawlerRunConfig(
scroll_count=20
),
extraction_strategy=LLMExtractionStrategy(
provider="openai/gpt-4o-mini",
llm_config=LLMConfig(provider="openai/gpt-4o-mini"),
schema=schema
)
)

View File

@@ -10,9 +10,8 @@ Today I'm releasing Crawl4AI v0.7.0—the Adaptive Intelligence Update. This rel
- **Adaptive Crawling**: Your crawler now learns and adapts to website patterns
- **Virtual Scroll Support**: Complete content extraction from infinite scroll pages
- **Link Preview with 3-Layer Scoring**: Intelligent link analysis and prioritization
- **Link Preview with Intelligent Scoring**: Intelligent link analysis and prioritization
- **Async URL Seeder**: Discover thousands of URLs in seconds with intelligent filtering
- **PDF Parsing**: Extract data from PDF documents
- **Performance Optimizations**: Significant speed and memory improvements
## 🧠 Adaptive Crawling: Intelligence Through Pattern Learning
@@ -30,44 +29,34 @@ The Adaptive Crawler maintains a persistent state for each domain, tracking:
- Extraction confidence scores
```python
from crawl4ai import AdaptiveCrawler, AdaptiveConfig, CrawlState
from crawl4ai import AsyncWebCrawler, AdaptiveCrawler, AdaptiveConfig
# Initialize with custom learning parameters
# Initialize with custom adaptive parameters
config = AdaptiveConfig(
confidence_threshold=0.7, # Min confidence to use learned patterns
max_history=100, # Remember last 100 crawls per domain
learning_rate=0.2, # How quickly to adapt to changes
patterns_per_page=3, # Patterns to learn per page type
extraction_strategy='css' # 'css' or 'xpath'
confidence_threshold=0.7, # Min confidence to stop crawling
max_depth=5, # Maximum crawl depth
max_pages=20, # Maximum number of pages to crawl
top_k_links=3, # Number of top links to follow per page
strategy="statistical", # 'statistical' or 'embedding'
coverage_weight=0.4, # Weight for coverage in confidence calculation
consistency_weight=0.3, # Weight for consistency in confidence calculation
saturation_weight=0.3 # Weight for saturation in confidence calculation
)
adaptive_crawler = AdaptiveCrawler(config)
# First crawl - crawler learns the structure
# Initialize adaptive crawler with web crawler
async with AsyncWebCrawler() as crawler:
result = await crawler.arun(
"https://news.example.com/article/12345",
config=CrawlerRunConfig(
adaptive_config=config,
extraction_hints={ # Optional hints to speed up learning
"title": "article h1",
"content": "article .body-content"
}
)
adaptive_crawler = AdaptiveCrawler(crawler, config)
# Crawl and learn patterns
state = await adaptive_crawler.digest(
start_url="https://news.example.com/article/12345",
query="latest news articles and content"
)
# Crawler identifies and stores patterns
if result.success:
state = adaptive_crawler.get_state("news.example.com")
print(f"Learned {len(state.patterns)} patterns")
print(f"Confidence: {state.avg_confidence:.2%}")
# Subsequent crawls - uses learned patterns
result2 = await crawler.arun(
"https://news.example.com/article/67890",
config=CrawlerRunConfig(adaptive_config=config)
)
# Automatically extracts using learned patterns!
# Access results and confidence
print(f"Confidence Level: {adaptive_crawler.confidence:.0%}")
print(f"Pages Crawled: {len(state.crawled_urls)}")
print(f"Knowledge Base: {len(adaptive_crawler.state.knowledge_base)} documents")
```
**Expected Real-World Impact:**
@@ -92,9 +81,7 @@ twitter_config = VirtualScrollConfig(
container_selector="[data-testid='primaryColumn']",
scroll_count=20, # Number of scrolls
scroll_by="container_height", # Smart scrolling by container size
wait_after_scroll=1.0, # Let content load
capture_method="incremental", # Capture new content on each scroll
deduplicate=True # Remove duplicate elements
wait_after_scroll=1.0 # Let content load
)
# For e-commerce product grids (Instagram style)
@@ -102,8 +89,7 @@ grid_config = VirtualScrollConfig(
container_selector="main .product-grid",
scroll_count=30,
scroll_by=800, # Fixed pixel scrolling
wait_after_scroll=1.5, # Images need time
stop_on_no_change=True # Smart stopping
wait_after_scroll=1.5 # Images need time
)
# For news feeds with lazy loading
@@ -111,9 +97,7 @@ news_config = VirtualScrollConfig(
container_selector=".article-feed",
scroll_count=50,
scroll_by="page_height", # Viewport-based scrolling
wait_after_scroll=0.5,
wait_for_selector=".article-card", # Wait for specific elements
timeout=30000 # Max 30 seconds total
wait_after_scroll=0.5 # Wait for content to load
)
# Use it in your crawl
@@ -160,29 +144,17 @@ async with AsyncWebCrawler() as crawler:
### The Three-Layer Scoring System
```python
from crawl4ai import LinkPreviewConfig
from crawl4ai import LinkPreviewConfig, CrawlerRunConfig, CacheMode
# Configure intelligent link analysis
link_config = LinkPreviewConfig(
# What to analyze
include_internal=True,
include_external=True,
max_links=100, # Analyze top 100 links
# Relevance scoring
query="machine learning tutorials", # Your interest
score_threshold=0.3, # Minimum relevance score
# Performance
concurrent_requests=10, # Parallel processing
timeout_per_link=5000, # 5s per link
# Advanced scoring weights
scoring_weights={
"intrinsic": 0.3, # Link quality indicators
"contextual": 0.5, # Relevance to query
"popularity": 0.2 # Link prominence
}
include_external=False,
max_links=10,
concurrency=5,
query="python tutorial", # For contextual scoring
score_threshold=0.3,
verbose=True
)
# Use in your crawl
@@ -190,35 +162,51 @@ result = await crawler.arun(
"https://tech-blog.example.com",
config=CrawlerRunConfig(
link_preview_config=link_config,
score_links=True
score_links=True, # Enable intrinsic scoring
cache_mode=CacheMode.BYPASS
)
)
# Access scored and sorted links
for link in result.links["internal"][:10]: # Top 10 internal links
print(f"Score: {link['total_score']:.3f}")
print(f" Intrinsic: {link['intrinsic_score']:.1f}/10") # Position, attributes
print(f" Contextual: {link['contextual_score']:.1f}/1") # Relevance to query
print(f" URL: {link['href']}")
print(f" Title: {link['head_data']['title']}")
print(f" Description: {link['head_data']['meta']['description'][:100]}...")
if result.success and result.links:
# Get scored links
internal_links = result.links.get("internal", [])
scored_links = [l for l in internal_links if l.get("total_score")]
scored_links.sort(key=lambda x: x.get("total_score", 0), reverse=True)
# Create a scoring table
table = Table(title="Link Scoring Results", box=box.ROUNDED)
table.add_column("Link Text", style="cyan", width=40)
table.add_column("Intrinsic Score", justify="center")
table.add_column("Contextual Score", justify="center")
table.add_column("Total Score", justify="center", style="bold green")
for link in scored_links[:5]:
text = link.get('text', 'No text')[:40]
table.add_row(
text,
f"{link.get('intrinsic_score', 0):.1f}/10",
f"{link.get('contextual_score', 0):.2f}/1",
f"{link.get('total_score', 0):.3f}"
)
console.print(table)
```
**Scoring Components:**
1. **Intrinsic Score (0-10)**: Based on link quality indicators
1. **Intrinsic Score**: Based on link quality indicators
- Position on page (navigation, content, footer)
- Link attributes (rel, title, class names)
- Anchor text quality and length
- URL structure and depth
2. **Contextual Score (0-1)**: Relevance to your query
- Semantic similarity using embeddings
2. **Contextual Score**: Relevance to your query using BM25 algorithm
- Keyword matching in link text and title
- Meta description analysis
- Content preview scoring
3. **Total Score**: Weighted combination for final ranking
3. **Total Score**: Combined score for final ranking
**Expected Real-World Impact:**
- **Research Efficiency**: Find relevant papers 10x faster by following only high-score links
@@ -240,53 +228,53 @@ from crawl4ai import AsyncUrlSeeder, SeedingConfig
# Basic discovery - find all product pages
seeder_config = SeedingConfig(
# Discovery sources
source="sitemap+cc", # Sitemap + Common Crawl
source="cc+sitemap", # Sitemap + Common Crawl
# Filtering
pattern="*/product/*", # URL pattern matching
ignore_patterns=["*/reviews/*", "*/questions/*"],
# Validation
live_check=True, # Verify URLs are alive
max_urls=5000, # Stop at 5000 URLs
max_urls=50, # Stop at 50 URLs
# Performance
concurrency=100, # Parallel requests
hits_per_sec=10 # Rate limiting
concurrency=100, # Maximum concurrent requests for live checks/head extraction
hits_per_sec=10 # Rate limit in requests per second to avoid overwhelming servers
)
seeder = AsyncUrlSeeder(seeder_config)
urls = await seeder.discover("https://shop.example.com")
async with AsyncUrlSeeder() as seeder:
console.print("Discovering URLs from Python docs...")
urls = await seeder.urls("docs.python.org", seeding_config)
console.print(f"\n✓ Discovered {len(urls)} URLs")
# Advanced: Relevance-based discovery
research_config = SeedingConfig(
source="crawl+sitemap", # Deep crawl + sitemap
source="sitemap+cc", # Sitemap + Common Crawl
pattern="*/blog/*", # Blog posts only
# Content relevance
extract_head=True, # Get meta tags
query="quantum computing tutorials",
scoring_method="bm25", # Or "semantic" (coming soon)
scoring_method="bm25", # BM25 scoring method
score_threshold=0.4, # High relevance only
# Smart filtering
filter_nonsense_urls=True, # Remove .xml, .txt, etc.
min_content_length=500, # Skip thin content
force=True # Bypass cache
)
# Discover with progress tracking
discovered = []
async for batch in seeder.discover_iter("https://physics-blog.com", research_config):
discovered.extend(batch)
print(f"Found {len(discovered)} relevant URLs so far...")
async with AsyncUrlSeeder() as seeder:
discovered = await seeder.urls("https://physics-blog.com", research_config)
console.print(f"\n✓ Discovered {len(discovered)} URLs")
# Results include scores and metadata
for url_data in discovered[:5]:
print(f"URL: {url_data['url']}")
print(f"Score: {url_data['score']:.3f}")
print(f"Title: {url_data['title']}")
print(f"Score: {url_data['relevance_score']:.3f}")
print(f"Title: {url_data['head_data']['title']}")
```
**Discovery Methods:**
@@ -309,35 +297,18 @@ This release includes significant performance improvements through optimized res
### What We Optimized
```python
# Before v0.7.0 (slow)
# Optimized crawling with v0.7.0 improvements
results = []
for url in urls:
result = await crawler.arun(url)
results.append(result)
# After v0.7.0 (fast)
# Automatic batching and connection pooling
results = await crawler.arun_batch(
urls,
config=CrawlerRunConfig(
# New performance options
batch_size=10, # Process 10 URLs concurrently
reuse_browser=True, # Keep browser warm
eager_loading=False, # Load only what's needed
streaming_extraction=True, # Stream large extractions
# Optimized defaults
wait_until="domcontentloaded", # Faster than networkidle
exclude_external_resources=True, # Skip third-party assets
block_ads=True # Ad blocking built-in
result = await crawler.arun(
url,
config=CrawlerRunConfig(
# Performance optimizations
wait_until="domcontentloaded", # Faster than networkidle
cache_mode=CacheMode.ENABLED # Enable caching
)
)
)
# Memory-efficient streaming for large crawls
async for result in crawler.arun_stream(large_url_list):
# Process results as they complete
await process_result(result)
# Memory is freed after each iteration
results.append(result)
```
**Performance Gains:**
@@ -347,24 +318,6 @@ async for result in crawler.arun_stream(large_url_list):
- **Memory Usage**: 60% reduction with streaming processing
- **Concurrent Crawls**: Handle 5x more parallel requests
## 📄 PDF Support
PDF extraction is now natively supported in Crawl4AI.
```python
# Extract data from PDF documents
result = await crawler.arun(
"https://example.com/report.pdf",
config=CrawlerRunConfig(
pdf_extraction=True,
extraction_strategy=JsonCssExtractionStrategy({
# Works on converted PDF structure
"title": {"selector": "h1", "type": "text"},
"sections": {"selector": "h2", "type": "list"}
})
)
)
```
## 🔧 Important Changes

View File

@@ -35,7 +35,7 @@ from crawl4ai import AsyncWebCrawler, AdaptiveCrawler
async def main():
async with AsyncWebCrawler() as crawler:
# Create an adaptive crawler
# Create an adaptive crawler (config is optional)
adaptive = AdaptiveCrawler(crawler)
# Start crawling with a query
@@ -59,13 +59,13 @@ async def main():
from crawl4ai import AdaptiveConfig
config = AdaptiveConfig(
confidence_threshold=0.7, # Stop when 70% confident (default: 0.8)
max_pages=20, # Maximum pages to crawl (default: 50)
top_k_links=3, # Links to follow per page (default: 5)
confidence_threshold=0.8, # Stop when 80% confident (default: 0.7)
max_pages=30, # Maximum pages to crawl (default: 20)
top_k_links=5, # Links to follow per page (default: 3)
min_gain_threshold=0.05 # Minimum expected gain to continue (default: 0.1)
)
adaptive = AdaptiveCrawler(crawler, config=config)
adaptive = AdaptiveCrawler(crawler, config)
```
## Crawling Strategies
@@ -198,8 +198,8 @@ if result.metrics.get('is_irrelevant', False):
The confidence score (0-1) indicates how sufficient the gathered information is:
- **0.0-0.3**: Insufficient information, needs more crawling
- **0.3-0.6**: Partial information, may answer basic queries
- **0.6-0.8**: Good coverage, can answer most queries
- **0.8-1.0**: Excellent coverage, comprehensive information
- **0.6-0.7**: Good coverage, can answer most queries
- **0.7-1.0**: Excellent coverage, comprehensive information
### Statistics Display
@@ -257,9 +257,9 @@ new_adaptive.import_knowledge_base("knowledge_base.jsonl")
- Avoid overly broad queries
### 2. Threshold Tuning
- Start with default (0.8) for general use
- Lower to 0.6-0.7 for exploratory crawling
- Raise to 0.9+ for exhaustive coverage
- Start with default (0.7) for general use
- Lower to 0.5-0.6 for exploratory crawling
- Raise to 0.8+ for exhaustive coverage
### 3. Performance Optimization
- Use appropriate `max_pages` limits

View File

@@ -137,7 +137,7 @@ async def smart_blog_crawler():
word_count_threshold=300 # Only substantial articles
)
# Extract URLs and stream results as they come
# Extract URLs and crawl them
tutorial_urls = [t["url"] for t in tutorials[:10]]
results = await crawler.arun_many(tutorial_urls, config=config)
@@ -231,7 +231,7 @@ Common Crawl is a massive public dataset that regularly crawls the entire web. I
```python
# Use both sources
config = SeedingConfig(source="cc+sitemap")
config = SeedingConfig(source="sitemap+cc")
urls = await seeder.urls("example.com", config)
```
@@ -241,13 +241,13 @@ The `SeedingConfig` object is your control panel. Here's everything you can conf
| Parameter | Type | Default | Description |
|-----------|------|---------|-------------|
| `source` | str | "cc" | URL source: "cc" (Common Crawl), "sitemap", or "cc+sitemap" |
| `source` | str | "sitemap+cc" | URL source: "cc" (Common Crawl), "sitemap", or "sitemap+cc" |
| `pattern` | str | "*" | URL pattern filter (e.g., "*/blog/*", "*.html") |
| `extract_head` | bool | False | Extract metadata from page `<head>` |
| `live_check` | bool | False | Verify URLs are accessible |
| `max_urls` | int | -1 | Maximum URLs to return (-1 = unlimited) |
| `concurrency` | int | 10 | Parallel workers for fetching |
| `hits_per_sec` | int | None | Rate limit for requests |
| `hits_per_sec` | int | 5 | Rate limit for requests |
| `force` | bool | False | Bypass cache, fetch fresh data |
| `verbose` | bool | False | Show detailed progress |
| `query` | str | None | Search query for BM25 scoring |
@@ -522,7 +522,7 @@ urls = await seeder.urls("docs.example.com", config)
```python
# Find specific products
config = SeedingConfig(
source="cc+sitemap", # Use both sources
source="sitemap+cc", # Use both sources
extract_head=True,
query="wireless headphones noise canceling",
scoring_method="bm25",
@@ -782,7 +782,7 @@ class ResearchAssistant:
# Step 1: Discover relevant URLs
config = SeedingConfig(
source="cc+sitemap", # Maximum coverage
source="sitemap+cc", # Maximum coverage
extract_head=True, # Get metadata
query=topic, # Research topic
scoring_method="bm25", # Smart scoring
@@ -832,7 +832,8 @@ class ResearchAssistant:
# Extract URLs and crawl all articles
article_urls = [article['url'] for article in top_articles]
results = []
async for result in await crawler.arun_many(article_urls, config=config):
crawl_results = await crawler.arun_many(article_urls, config=config)
async for result in crawl_results:
if result.success:
results.append({
'url': result.url,
@@ -933,10 +934,10 @@ config = SeedingConfig(concurrency=10, hits_per_sec=5)
# When crawling many URLs
async with AsyncWebCrawler() as crawler:
# Assuming urls is a list of URL strings
results = await crawler.arun_many(urls, config=config)
crawl_results = await crawler.arun_many(urls, config=config)
# Process as they arrive
async for result in results:
async for result in crawl_results:
process_immediately(result) # Don't wait for all
```
@@ -1020,7 +1021,7 @@ config = SeedingConfig(
# E-commerce product discovery
config = SeedingConfig(
source="cc+sitemap",
source="sitemap+cc",
pattern="*/product/*",
extract_head=True,
live_check=True

View File

@@ -25,6 +25,8 @@ nav:
- "Command Line Interface": "core/cli.md"
- "Simple Crawling": "core/simple-crawling.md"
- "Deep Crawling": "core/deep-crawling.md"
- "Adaptive Crawling": "core/adaptive-crawling.md"
- "URL Seeding": "core/url-seeding.md"
- "C4A-Script": "core/c4a-script.md"
- "Crawler Result": "core/crawler-result.md"
- "Browser, Crawler & LLM Config": "core/browser-crawler-config.md"
@@ -37,6 +39,7 @@ nav:
- "Link & Media": "core/link-media.md"
- Advanced:
- "Overview": "advanced/advanced-features.md"
- "Adaptive Strategies": "advanced/adaptive-strategies.md"
- "Virtual Scroll": "advanced/virtual-scroll.md"
- "File Downloading": "advanced/file-downloading.md"
- "Lazy Loading": "advanced/lazy-loading.md"