24723b2f10
- Updated version to 0.3.743 - Improved ManagedBrowser configuration with dynamic host/port - Implemented fast HTML formatting in web crawler - Enhanced markdown generation with a new generator class - Improved sanitization and utility functions - Added contributor details and pull request acknowledgments - Updated documentation for clearer usage scenarios - Adjusted tests to reflect class name changes
1276 lines
46 KiB
Python
1276 lines
46 KiB
Python
import time
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from bs4 import BeautifulSoup, Comment, element, Tag, NavigableString
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import json
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import html
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import re
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import os
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import platform
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from .html2text import HTML2Text
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from .prompts import PROMPT_EXTRACT_BLOCKS
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from .config import *
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from pathlib import Path
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from typing import Dict, Any
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from urllib.parse import urljoin
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import requests
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from requests.exceptions import InvalidSchema
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import hashlib
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from typing import Optional, Tuple, Dict, Any
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import xxhash
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from .html2text import HTML2Text
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class CustomHTML2Text(HTML2Text):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.inside_pre = False
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self.inside_code = False
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self.preserve_tags = set() # Set of tags to preserve
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self.current_preserved_tag = None
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self.preserved_content = []
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self.preserve_depth = 0
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# Configuration options
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self.skip_internal_links = False
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self.single_line_break = False
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self.mark_code = False
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self.include_sup_sub = False
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self.body_width = 0
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self.ignore_mailto_links = True
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self.ignore_links = False
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self.escape_backslash = False
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self.escape_dot = False
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self.escape_plus = False
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self.escape_dash = False
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self.escape_snob = False
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def update_params(self, **kwargs):
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"""Update parameters and set preserved tags."""
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for key, value in kwargs.items():
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if key == 'preserve_tags':
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self.preserve_tags = set(value)
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else:
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setattr(self, key, value)
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def handle_tag(self, tag, attrs, start):
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# Handle preserved tags
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if tag in self.preserve_tags:
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if start:
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if self.preserve_depth == 0:
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self.current_preserved_tag = tag
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self.preserved_content = []
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# Format opening tag with attributes
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attr_str = ''.join(f' {k}="{v}"' for k, v in attrs.items() if v is not None)
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self.preserved_content.append(f'<{tag}{attr_str}>')
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self.preserve_depth += 1
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return
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else:
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self.preserve_depth -= 1
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if self.preserve_depth == 0:
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self.preserved_content.append(f'</{tag}>')
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# Output the preserved HTML block with proper spacing
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preserved_html = ''.join(self.preserved_content)
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self.o('\n' + preserved_html + '\n')
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self.current_preserved_tag = None
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return
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# If we're inside a preserved tag, collect all content
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if self.preserve_depth > 0:
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if start:
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# Format nested tags with attributes
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attr_str = ''.join(f' {k}="{v}"' for k, v in attrs.items() if v is not None)
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self.preserved_content.append(f'<{tag}{attr_str}>')
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else:
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self.preserved_content.append(f'</{tag}>')
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return
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# Handle pre tags
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if tag == 'pre':
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if start:
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self.o('```\n')
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self.inside_pre = True
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else:
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self.o('\n```')
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self.inside_pre = False
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# elif tag in ["h1", "h2", "h3", "h4", "h5", "h6"]:
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# pass
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else:
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super().handle_tag(tag, attrs, start)
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def handle_data(self, data, entity_char=False):
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"""Override handle_data to capture content within preserved tags."""
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if self.preserve_depth > 0:
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self.preserved_content.append(data)
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return
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super().handle_data(data, entity_char)
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class InvalidCSSSelectorError(Exception):
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pass
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def calculate_semaphore_count():
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cpu_count = os.cpu_count()
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memory_gb = get_system_memory() / (1024 ** 3) # Convert to GB
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base_count = max(1, cpu_count // 2)
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memory_based_cap = int(memory_gb / 2) # Assume 2GB per instance
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return min(base_count, memory_based_cap)
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def get_system_memory():
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system = platform.system()
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if system == "Linux":
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with open('/proc/meminfo', 'r') as mem:
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for line in mem:
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if line.startswith('MemTotal:'):
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return int(line.split()[1]) * 1024 # Convert KB to bytes
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elif system == "Darwin": # macOS
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import subprocess
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output = subprocess.check_output(['sysctl', '-n', 'hw.memsize']).decode('utf-8')
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return int(output.strip())
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elif system == "Windows":
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import ctypes
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kernel32 = ctypes.windll.kernel32
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c_ulonglong = ctypes.c_ulonglong
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class MEMORYSTATUSEX(ctypes.Structure):
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_fields_ = [
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('dwLength', ctypes.c_ulong),
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('dwMemoryLoad', ctypes.c_ulong),
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('ullTotalPhys', c_ulonglong),
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('ullAvailPhys', c_ulonglong),
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('ullTotalPageFile', c_ulonglong),
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('ullAvailPageFile', c_ulonglong),
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('ullTotalVirtual', c_ulonglong),
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('ullAvailVirtual', c_ulonglong),
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('ullAvailExtendedVirtual', c_ulonglong),
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]
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memoryStatus = MEMORYSTATUSEX()
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memoryStatus.dwLength = ctypes.sizeof(MEMORYSTATUSEX)
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kernel32.GlobalMemoryStatusEx(ctypes.byref(memoryStatus))
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return memoryStatus.ullTotalPhys
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else:
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raise OSError("Unsupported operating system")
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def get_home_folder():
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home_folder = os.path.join(os.getenv("CRAWL4_AI_BASE_DIRECTORY", os.getenv("CRAWL4_AI_BASE_DIRECTORY", Path.home())), ".crawl4ai")
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os.makedirs(home_folder, exist_ok=True)
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os.makedirs(f"{home_folder}/cache", exist_ok=True)
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os.makedirs(f"{home_folder}/models", exist_ok=True)
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return home_folder
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def beautify_html(escaped_html):
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"""
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Beautifies an escaped HTML string.
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Parameters:
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escaped_html (str): A string containing escaped HTML.
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Returns:
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str: A beautifully formatted HTML string.
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"""
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# Unescape the HTML string
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unescaped_html = html.unescape(escaped_html)
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# Use BeautifulSoup to parse and prettify the HTML
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soup = BeautifulSoup(unescaped_html, 'html.parser')
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pretty_html = soup.prettify()
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return pretty_html
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def split_and_parse_json_objects(json_string):
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"""
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Splits a JSON string which is a list of objects and tries to parse each object.
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Parameters:
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json_string (str): A string representation of a list of JSON objects, e.g., '[{...}, {...}, ...]'.
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Returns:
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tuple: A tuple containing two lists:
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- First list contains all successfully parsed JSON objects.
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- Second list contains the string representations of all segments that couldn't be parsed.
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"""
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# Trim the leading '[' and trailing ']'
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if json_string.startswith('[') and json_string.endswith(']'):
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json_string = json_string[1:-1].strip()
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# Split the string into segments that look like individual JSON objects
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segments = []
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depth = 0
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start_index = 0
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for i, char in enumerate(json_string):
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if char == '{':
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if depth == 0:
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start_index = i
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depth += 1
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elif char == '}':
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depth -= 1
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if depth == 0:
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segments.append(json_string[start_index:i+1])
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# Try parsing each segment
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parsed_objects = []
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unparsed_segments = []
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for segment in segments:
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try:
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obj = json.loads(segment)
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parsed_objects.append(obj)
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except json.JSONDecodeError:
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unparsed_segments.append(segment)
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return parsed_objects, unparsed_segments
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def sanitize_html(html):
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# Replace all unwanted and special characters with an empty string
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sanitized_html = html
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# sanitized_html = re.sub(r'[^\w\s.,;:!?=\[\]{}()<>\/\\\-"]', '', html)
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# Escape all double and single quotes
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sanitized_html = sanitized_html.replace('"', '\\"').replace("'", "\\'")
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return sanitized_html
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def sanitize_input_encode(text: str) -> str:
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"""Sanitize input to handle potential encoding issues."""
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try:
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try:
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if not text:
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return ''
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# Attempt to encode and decode as UTF-8 to handle potential encoding issues
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return text.encode('utf-8', errors='ignore').decode('utf-8')
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except UnicodeEncodeError as e:
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print(f"Warning: Encoding issue detected. Some characters may be lost. Error: {e}")
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# Fall back to ASCII if UTF-8 fails
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return text.encode('ascii', errors='ignore').decode('ascii')
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except Exception as e:
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raise ValueError(f"Error sanitizing input: {str(e)}") from e
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def escape_json_string(s):
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"""
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Escapes characters in a string to be JSON safe.
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Parameters:
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s (str): The input string to be escaped.
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Returns:
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str: The escaped string, safe for JSON encoding.
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"""
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# Replace problematic backslash first
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s = s.replace('\\', '\\\\')
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# Replace the double quote
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s = s.replace('"', '\\"')
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# Escape control characters
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s = s.replace('\b', '\\b')
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s = s.replace('\f', '\\f')
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s = s.replace('\n', '\\n')
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s = s.replace('\r', '\\r')
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s = s.replace('\t', '\\t')
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# Additional problematic characters
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# Unicode control characters
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s = re.sub(r'[\x00-\x1f\x7f-\x9f]', lambda x: '\\u{:04x}'.format(ord(x.group())), s)
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return s
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class CustomHTML2Text_v0(HTML2Text):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.inside_pre = False
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self.inside_code = False
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self.skip_internal_links = False
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self.single_line_break = False
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self.mark_code = False
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self.include_sup_sub = False
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self.body_width = 0
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self.ignore_mailto_links = True
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self.ignore_links = False
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self.escape_backslash = False
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self.escape_dot = False
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self.escape_plus = False
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self.escape_dash = False
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self.escape_snob = False
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def handle_tag(self, tag, attrs, start):
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if tag == 'pre':
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if start:
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self.o('```\n')
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self.inside_pre = True
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else:
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self.o('\n```')
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self.inside_pre = False
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elif tag in ["h1", "h2", "h3", "h4", "h5", "h6"]:
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pass
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# elif tag == 'code' and not self.inside_pre:
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# if start:
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# if not self.inside_pre:
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# self.o('`')
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# self.inside_code = True
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# else:
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# if not self.inside_pre:
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# self.o('`')
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# self.inside_code = False
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super().handle_tag(tag, attrs, start)
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def replace_inline_tags(soup, tags, only_text=False):
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tag_replacements = {
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'b': lambda tag: f"**{tag.text}**",
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'i': lambda tag: f"*{tag.text}*",
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'u': lambda tag: f"__{tag.text}__",
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'span': lambda tag: f"{tag.text}",
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'del': lambda tag: f"~~{tag.text}~~",
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'ins': lambda tag: f"++{tag.text}++",
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'sub': lambda tag: f"~{tag.text}~",
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'sup': lambda tag: f"^^{tag.text}^^",
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'strong': lambda tag: f"**{tag.text}**",
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'em': lambda tag: f"*{tag.text}*",
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'code': lambda tag: f"`{tag.text}`",
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'kbd': lambda tag: f"`{tag.text}`",
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'var': lambda tag: f"_{tag.text}_",
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's': lambda tag: f"~~{tag.text}~~",
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'q': lambda tag: f'"{tag.text}"',
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'abbr': lambda tag: f"{tag.text} ({tag.get('title', '')})",
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'cite': lambda tag: f"_{tag.text}_",
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'dfn': lambda tag: f"_{tag.text}_",
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'time': lambda tag: f"{tag.text}",
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'small': lambda tag: f"<small>{tag.text}</small>",
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'mark': lambda tag: f"=={tag.text}=="
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}
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replacement_data = [(tag, tag_replacements.get(tag, lambda t: t.text)) for tag in tags]
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for tag_name, replacement_func in replacement_data:
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for tag in soup.find_all(tag_name):
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replacement_text = tag.text if only_text else replacement_func(tag)
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tag.replace_with(replacement_text)
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return soup
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# for tag_name in tags:
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# for tag in soup.find_all(tag_name):
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# if not only_text:
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# replacement_text = tag_replacements.get(tag_name, lambda t: t.text)(tag)
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# tag.replace_with(replacement_text)
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# else:
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# tag.replace_with(tag.text)
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# return soup
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def get_content_of_website(url, html, word_count_threshold = MIN_WORD_THRESHOLD, css_selector = None, **kwargs):
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try:
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if not html:
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return None
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# Parse HTML content with BeautifulSoup
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soup = BeautifulSoup(html, 'html.parser')
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# Get the content within the <body> tag
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body = soup.body
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# If css_selector is provided, extract content based on the selector
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if css_selector:
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selected_elements = body.select(css_selector)
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if not selected_elements:
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raise InvalidCSSSelectorError(f"Invalid CSS selector , No elements found for CSS selector: {css_selector}")
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div_tag = soup.new_tag('div')
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for el in selected_elements:
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div_tag.append(el)
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body = div_tag
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links = {
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'internal': [],
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'external': []
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}
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# Extract all internal and external links
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for a in body.find_all('a', href=True):
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href = a['href']
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url_base = url.split('/')[2]
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if href.startswith('http') and url_base not in href:
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links['external'].append({
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'href': href,
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'text': a.get_text()
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})
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else:
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links['internal'].append(
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{
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'href': href,
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'text': a.get_text()
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}
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)
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# Remove script, style, and other tags that don't carry useful content from body
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for tag in body.find_all(['script', 'style', 'link', 'meta', 'noscript']):
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tag.decompose()
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# Remove all attributes from remaining tags in body, except for img tags
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for tag in body.find_all():
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if tag.name != 'img':
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tag.attrs = {}
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# Extract all img tgas int0 [{src: '', alt: ''}]
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media = {
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'images': [],
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'videos': [],
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'audios': []
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}
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for img in body.find_all('img'):
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media['images'].append({
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'src': img.get('src'),
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'alt': img.get('alt'),
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"type": "image"
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})
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|
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# Extract all video tags into [{src: '', alt: ''}]
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for video in body.find_all('video'):
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media['videos'].append({
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'src': video.get('src'),
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'alt': video.get('alt'),
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"type": "video"
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})
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|
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# Extract all audio tags into [{src: '', alt: ''}]
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for audio in body.find_all('audio'):
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media['audios'].append({
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'src': audio.get('src'),
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'alt': audio.get('alt'),
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"type": "audio"
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})
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|
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# Replace images with their alt text or remove them if no alt text is available
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for img in body.find_all('img'):
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alt_text = img.get('alt')
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if alt_text:
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img.replace_with(soup.new_string(alt_text))
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else:
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img.decompose()
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|
|
|
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# Create a function that replace content of all"pre" tag with its inner text
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|
def replace_pre_tags_with_text(node):
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for child in node.find_all('pre'):
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# set child inner html to its text
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child.string = child.get_text()
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return node
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# Replace all "pre" tags with their inner text
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body = replace_pre_tags_with_text(body)
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|
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# Replace inline tags with their text content
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body = replace_inline_tags(
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body,
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['b', 'i', 'u', 'span', 'del', 'ins', 'sub', 'sup', 'strong', 'em', 'code', 'kbd', 'var', 's', 'q', 'abbr', 'cite', 'dfn', 'time', 'small', 'mark'],
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only_text=kwargs.get('only_text', False)
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)
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# Recursively remove empty elements, their parent elements, and elements with word count below threshold
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def remove_empty_and_low_word_count_elements(node, word_count_threshold):
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for child in node.contents:
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if isinstance(child, element.Tag):
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remove_empty_and_low_word_count_elements(child, word_count_threshold)
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word_count = len(child.get_text(strip=True).split())
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if (len(child.contents) == 0 and not child.get_text(strip=True)) or word_count < word_count_threshold:
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child.decompose()
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return node
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body = remove_empty_and_low_word_count_elements(body, word_count_threshold)
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|
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def remove_small_text_tags(body: Tag, word_count_threshold: int = MIN_WORD_THRESHOLD):
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# We'll use a list to collect all tags that don't meet the word count requirement
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tags_to_remove = []
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# Traverse all tags in the body
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for tag in body.find_all(True): # True here means all tags
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# Check if the tag contains text and if it's not just whitespace
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if tag.string and tag.string.strip():
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# Split the text by spaces and count the words
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|
word_count = len(tag.string.strip().split())
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# If the word count is less than the threshold, mark the tag for removal
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|
if word_count < word_count_threshold:
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tags_to_remove.append(tag)
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|
|
|
# Remove all marked tags from the tree
|
|
for tag in tags_to_remove:
|
|
tag.decompose() # or tag.extract() to remove and get the element
|
|
|
|
return body
|
|
|
|
|
|
# Remove small text tags
|
|
body = remove_small_text_tags(body, word_count_threshold)
|
|
|
|
def is_empty_or_whitespace(tag: Tag):
|
|
if isinstance(tag, NavigableString):
|
|
return not tag.strip()
|
|
# Check if the tag itself is empty or all its children are empty/whitespace
|
|
if not tag.contents:
|
|
return True
|
|
return all(is_empty_or_whitespace(child) for child in tag.contents)
|
|
|
|
def remove_empty_tags(body: Tag):
|
|
# Continue processing until no more changes are made
|
|
changes = True
|
|
while changes:
|
|
changes = False
|
|
# Collect all tags that are empty or contain only whitespace
|
|
empty_tags = [tag for tag in body.find_all(True) if is_empty_or_whitespace(tag)]
|
|
for tag in empty_tags:
|
|
# If a tag is empty, decompose it
|
|
tag.decompose()
|
|
changes = True # Mark that a change was made
|
|
|
|
return body
|
|
|
|
|
|
# Remove empty tags
|
|
body = remove_empty_tags(body)
|
|
|
|
# Flatten nested elements with only one child of the same type
|
|
def flatten_nested_elements(node):
|
|
for child in node.contents:
|
|
if isinstance(child, element.Tag):
|
|
flatten_nested_elements(child)
|
|
if len(child.contents) == 1 and child.contents[0].name == child.name:
|
|
# print('Flattening:', child.name)
|
|
child_content = child.contents[0]
|
|
child.replace_with(child_content)
|
|
|
|
return node
|
|
|
|
body = flatten_nested_elements(body)
|
|
|
|
|
|
|
|
# Remove comments
|
|
for comment in soup.find_all(string=lambda text: isinstance(text, Comment)):
|
|
comment.extract()
|
|
|
|
# Remove consecutive empty newlines and replace multiple spaces with a single space
|
|
cleaned_html = str(body).replace('\n\n', '\n').replace(' ', ' ')
|
|
|
|
# Sanitize the cleaned HTML content
|
|
cleaned_html = sanitize_html(cleaned_html)
|
|
# sanitized_html = escape_json_string(cleaned_html)
|
|
|
|
# Convert cleaned HTML to Markdown
|
|
h = html2text.HTML2Text()
|
|
h = CustomHTML2Text()
|
|
h.ignore_links = True
|
|
markdown = h.handle(cleaned_html)
|
|
markdown = markdown.replace(' ```', '```')
|
|
|
|
try:
|
|
meta = extract_metadata(html, soup)
|
|
except Exception as e:
|
|
print('Error extracting metadata:', str(e))
|
|
meta = {}
|
|
|
|
|
|
# Return the Markdown content
|
|
return{
|
|
'markdown': markdown,
|
|
'cleaned_html': cleaned_html,
|
|
'success': True,
|
|
'media': media,
|
|
'links': links,
|
|
'metadata': meta
|
|
}
|
|
|
|
except Exception as e:
|
|
print('Error processing HTML content:', str(e))
|
|
raise InvalidCSSSelectorError(f"Invalid CSS selector: {css_selector}") from e
|
|
|
|
def get_content_of_website_optimized(url: str, html: str, word_count_threshold: int = MIN_WORD_THRESHOLD, css_selector: str = None, **kwargs) -> Dict[str, Any]:
|
|
if not html:
|
|
return None
|
|
|
|
soup = BeautifulSoup(html, 'html.parser')
|
|
body = soup.body
|
|
|
|
image_description_min_word_threshold = kwargs.get('image_description_min_word_threshold', IMAGE_DESCRIPTION_MIN_WORD_THRESHOLD)
|
|
|
|
for tag in kwargs.get('excluded_tags', []) or []:
|
|
for el in body.select(tag):
|
|
el.decompose()
|
|
|
|
if css_selector:
|
|
selected_elements = body.select(css_selector)
|
|
if not selected_elements:
|
|
raise InvalidCSSSelectorError(f"Invalid CSS selector, No elements found for CSS selector: {css_selector}")
|
|
body = soup.new_tag('div')
|
|
for el in selected_elements:
|
|
body.append(el)
|
|
|
|
links = {'internal': [], 'external': []}
|
|
media = {'images': [], 'videos': [], 'audios': []}
|
|
|
|
# Extract meaningful text for media files from closest parent
|
|
def find_closest_parent_with_useful_text(tag):
|
|
current_tag = tag
|
|
while current_tag:
|
|
current_tag = current_tag.parent
|
|
# Get the text content from the parent tag
|
|
if current_tag:
|
|
text_content = current_tag.get_text(separator=' ',strip=True)
|
|
# Check if the text content has at least word_count_threshold
|
|
if len(text_content.split()) >= image_description_min_word_threshold:
|
|
return text_content
|
|
return None
|
|
|
|
def process_image(img, url, index, total_images):
|
|
#Check if an image has valid display and inside undesired html elements
|
|
def is_valid_image(img, parent, parent_classes):
|
|
style = img.get('style', '')
|
|
src = img.get('src', '')
|
|
classes_to_check = ['button', 'icon', 'logo']
|
|
tags_to_check = ['button', 'input']
|
|
return all([
|
|
'display:none' not in style,
|
|
src,
|
|
not any(s in var for var in [src, img.get('alt', ''), *parent_classes] for s in classes_to_check),
|
|
parent.name not in tags_to_check
|
|
])
|
|
|
|
#Score an image for it's usefulness
|
|
def score_image_for_usefulness(img, base_url, index, images_count):
|
|
# Function to parse image height/width value and units
|
|
def parse_dimension(dimension):
|
|
if dimension:
|
|
match = re.match(r"(\d+)(\D*)", dimension)
|
|
if match:
|
|
number = int(match.group(1))
|
|
unit = match.group(2) or 'px' # Default unit is 'px' if not specified
|
|
return number, unit
|
|
return None, None
|
|
|
|
# Fetch image file metadata to extract size and extension
|
|
def fetch_image_file_size(img, base_url):
|
|
#If src is relative path construct full URL, if not it may be CDN URL
|
|
img_url = urljoin(base_url,img.get('src'))
|
|
try:
|
|
response = requests.head(img_url)
|
|
if response.status_code == 200:
|
|
return response.headers.get('Content-Length',None)
|
|
else:
|
|
print(f"Failed to retrieve file size for {img_url}")
|
|
return None
|
|
except InvalidSchema as e:
|
|
return None
|
|
finally:
|
|
return
|
|
|
|
image_height = img.get('height')
|
|
height_value, height_unit = parse_dimension(image_height)
|
|
image_width = img.get('width')
|
|
width_value, width_unit = parse_dimension(image_width)
|
|
image_size = 0 #int(fetch_image_file_size(img,base_url) or 0)
|
|
image_format = os.path.splitext(img.get('src',''))[1].lower()
|
|
# Remove . from format
|
|
image_format = image_format.strip('.')
|
|
score = 0
|
|
if height_value:
|
|
if height_unit == 'px' and height_value > 150:
|
|
score += 1
|
|
if height_unit in ['%','vh','vmin','vmax'] and height_value >30:
|
|
score += 1
|
|
if width_value:
|
|
if width_unit == 'px' and width_value > 150:
|
|
score += 1
|
|
if width_unit in ['%','vh','vmin','vmax'] and width_value >30:
|
|
score += 1
|
|
if image_size > 10000:
|
|
score += 1
|
|
if img.get('alt') != '':
|
|
score+=1
|
|
if any(image_format==format for format in ['jpg','png','webp']):
|
|
score+=1
|
|
if index/images_count<0.5:
|
|
score+=1
|
|
return score
|
|
|
|
if not is_valid_image(img, img.parent, img.parent.get('class', [])):
|
|
return None
|
|
score = score_image_for_usefulness(img, url, index, total_images)
|
|
if score <= IMAGE_SCORE_THRESHOLD:
|
|
return None
|
|
return {
|
|
'src': img.get('src', '').replace('\\"', '"').strip(),
|
|
'alt': img.get('alt', ''),
|
|
'desc': find_closest_parent_with_useful_text(img),
|
|
'score': score,
|
|
'type': 'image'
|
|
}
|
|
|
|
def process_element(element: element.PageElement) -> bool:
|
|
try:
|
|
if isinstance(element, NavigableString):
|
|
if isinstance(element, Comment):
|
|
element.extract()
|
|
return False
|
|
|
|
if element.name in ['script', 'style', 'link', 'meta', 'noscript']:
|
|
element.decompose()
|
|
return False
|
|
|
|
keep_element = False
|
|
|
|
if element.name == 'a' and element.get('href'):
|
|
href = element['href']
|
|
url_base = url.split('/')[2]
|
|
link_data = {'href': href, 'text': element.get_text()}
|
|
if href.startswith('http') and url_base not in href:
|
|
links['external'].append(link_data)
|
|
else:
|
|
links['internal'].append(link_data)
|
|
keep_element = True
|
|
|
|
elif element.name == 'img':
|
|
return True # Always keep image elements
|
|
|
|
elif element.name in ['video', 'audio']:
|
|
media[f"{element.name}s"].append({
|
|
'src': element.get('src'),
|
|
'alt': element.get('alt'),
|
|
'type': element.name,
|
|
'description': find_closest_parent_with_useful_text(element)
|
|
})
|
|
source_tags = element.find_all('source')
|
|
for source_tag in source_tags:
|
|
media[f"{element.name}s"].append({
|
|
'src': source_tag.get('src'),
|
|
'alt': element.get('alt'),
|
|
'type': element.name,
|
|
'description': find_closest_parent_with_useful_text(element)
|
|
})
|
|
return True # Always keep video and audio elements
|
|
|
|
if element.name != 'pre':
|
|
if element.name in ['b', 'i', 'u', 'span', 'del', 'ins', 'sub', 'sup', 'strong', 'em', 'code', 'kbd', 'var', 's', 'q', 'abbr', 'cite', 'dfn', 'time', 'small', 'mark']:
|
|
if kwargs.get('only_text', False):
|
|
element.replace_with(element.get_text())
|
|
else:
|
|
element.unwrap()
|
|
elif element.name != 'img':
|
|
element.attrs = {}
|
|
|
|
# Process children
|
|
for child in list(element.children):
|
|
if isinstance(child, NavigableString) and not isinstance(child, Comment):
|
|
if len(child.strip()) > 0:
|
|
keep_element = True
|
|
else:
|
|
if process_element(child):
|
|
keep_element = True
|
|
|
|
|
|
# Check word count
|
|
if not keep_element:
|
|
word_count = len(element.get_text(strip=True).split())
|
|
keep_element = word_count >= word_count_threshold
|
|
|
|
if not keep_element:
|
|
element.decompose()
|
|
|
|
return keep_element
|
|
except Exception as e:
|
|
print('Error processing element:', str(e))
|
|
return False
|
|
|
|
#process images by filtering and extracting contextual text from the page
|
|
imgs = body.find_all('img')
|
|
media['images'] = [
|
|
result for result in
|
|
(process_image(img, url, i, len(imgs)) for i, img in enumerate(imgs))
|
|
if result is not None
|
|
]
|
|
|
|
process_element(body)
|
|
|
|
def flatten_nested_elements(node):
|
|
if isinstance(node, NavigableString):
|
|
return node
|
|
if len(node.contents) == 1 and isinstance(node.contents[0], element.Tag) and node.contents[0].name == node.name:
|
|
return flatten_nested_elements(node.contents[0])
|
|
node.contents = [flatten_nested_elements(child) for child in node.contents]
|
|
return node
|
|
|
|
body = flatten_nested_elements(body)
|
|
base64_pattern = re.compile(r'data:image/[^;]+;base64,([^"]+)')
|
|
for img in imgs:
|
|
try:
|
|
src = img.get('src', '')
|
|
if base64_pattern.match(src):
|
|
img['src'] = base64_pattern.sub('', src)
|
|
except:
|
|
pass
|
|
|
|
cleaned_html = str(body).replace('\n\n', '\n').replace(' ', ' ')
|
|
cleaned_html = sanitize_html(cleaned_html)
|
|
|
|
h = CustomHTML2Text()
|
|
h.ignore_links = True
|
|
markdown = h.handle(cleaned_html)
|
|
markdown = markdown.replace(' ```', '```')
|
|
|
|
try:
|
|
meta = extract_metadata(html, soup)
|
|
except Exception as e:
|
|
print('Error extracting metadata:', str(e))
|
|
meta = {}
|
|
|
|
return {
|
|
'markdown': markdown,
|
|
'cleaned_html': cleaned_html,
|
|
'success': True,
|
|
'media': media,
|
|
'links': links,
|
|
'metadata': meta
|
|
}
|
|
|
|
def extract_metadata(html, soup=None):
|
|
metadata = {}
|
|
|
|
if not html and not soup:
|
|
return {}
|
|
|
|
if not soup:
|
|
soup = BeautifulSoup(html, 'lxml')
|
|
|
|
head = soup.head
|
|
if not head:
|
|
return metadata
|
|
|
|
# Title
|
|
title_tag = head.find('title')
|
|
metadata['title'] = title_tag.string.strip() if title_tag and title_tag.string else None
|
|
|
|
# Meta description
|
|
description_tag = head.find('meta', attrs={'name': 'description'})
|
|
metadata['description'] = description_tag.get('content', '').strip() if description_tag else None
|
|
|
|
# Meta keywords
|
|
keywords_tag = head.find('meta', attrs={'name': 'keywords'})
|
|
metadata['keywords'] = keywords_tag.get('content', '').strip() if keywords_tag else None
|
|
|
|
# Meta author
|
|
author_tag = head.find('meta', attrs={'name': 'author'})
|
|
metadata['author'] = author_tag.get('content', '').strip() if author_tag else None
|
|
|
|
# Open Graph metadata
|
|
og_tags = head.find_all('meta', attrs={'property': re.compile(r'^og:')})
|
|
for tag in og_tags:
|
|
property_name = tag.get('property', '').strip()
|
|
content = tag.get('content', '').strip()
|
|
if property_name and content:
|
|
metadata[property_name] = content
|
|
|
|
# Twitter Card metadata
|
|
twitter_tags = head.find_all('meta', attrs={'name': re.compile(r'^twitter:')})
|
|
for tag in twitter_tags:
|
|
property_name = tag.get('name', '').strip()
|
|
content = tag.get('content', '').strip()
|
|
if property_name and content:
|
|
metadata[property_name] = content
|
|
|
|
return metadata
|
|
|
|
|
|
def extract_xml_tags(string):
|
|
tags = re.findall(r'<(\w+)>', string)
|
|
return list(set(tags))
|
|
|
|
def extract_xml_data(tags, string):
|
|
data = {}
|
|
|
|
for tag in tags:
|
|
pattern = f"<{tag}>(.*?)</{tag}>"
|
|
match = re.search(pattern, string, re.DOTALL)
|
|
if match:
|
|
data[tag] = match.group(1).strip()
|
|
else:
|
|
data[tag] = ""
|
|
|
|
return data
|
|
|
|
# Function to perform the completion with exponential backoff
|
|
def perform_completion_with_backoff(
|
|
provider,
|
|
prompt_with_variables,
|
|
api_token,
|
|
json_response = False,
|
|
base_url=None,
|
|
**kwargs
|
|
):
|
|
from litellm import completion
|
|
from litellm.exceptions import RateLimitError
|
|
max_attempts = 3
|
|
base_delay = 2 # Base delay in seconds, you can adjust this based on your needs
|
|
|
|
extra_args = {}
|
|
if json_response:
|
|
extra_args["response_format"] = { "type": "json_object" }
|
|
|
|
if kwargs.get("extra_args"):
|
|
extra_args.update(kwargs["extra_args"])
|
|
|
|
for attempt in range(max_attempts):
|
|
try:
|
|
response =completion(
|
|
model=provider,
|
|
messages=[
|
|
{"role": "user", "content": prompt_with_variables}
|
|
],
|
|
temperature=0.01,
|
|
api_key=api_token,
|
|
base_url=base_url,
|
|
**extra_args
|
|
)
|
|
return response # Return the successful response
|
|
except RateLimitError as e:
|
|
print("Rate limit error:", str(e))
|
|
|
|
# Check if we have exhausted our max attempts
|
|
if attempt < max_attempts - 1:
|
|
# Calculate the delay and wait
|
|
delay = base_delay * (2 ** attempt) # Exponential backoff formula
|
|
print(f"Waiting for {delay} seconds before retrying...")
|
|
time.sleep(delay)
|
|
else:
|
|
# Return an error response after exhausting all retries
|
|
return [{
|
|
"index": 0,
|
|
"tags": ["error"],
|
|
"content": ["Rate limit error. Please try again later."]
|
|
}]
|
|
|
|
def extract_blocks(url, html, provider = DEFAULT_PROVIDER, api_token = None, base_url = None):
|
|
# api_token = os.getenv('GROQ_API_KEY', None) if not api_token else api_token
|
|
api_token = PROVIDER_MODELS.get(provider, None) if not api_token else api_token
|
|
|
|
variable_values = {
|
|
"URL": url,
|
|
"HTML": escape_json_string(sanitize_html(html)),
|
|
}
|
|
|
|
prompt_with_variables = PROMPT_EXTRACT_BLOCKS
|
|
for variable in variable_values:
|
|
prompt_with_variables = prompt_with_variables.replace(
|
|
"{" + variable + "}", variable_values[variable]
|
|
)
|
|
|
|
response = perform_completion_with_backoff(provider, prompt_with_variables, api_token, base_url=base_url)
|
|
|
|
try:
|
|
blocks = extract_xml_data(["blocks"], response.choices[0].message.content)['blocks']
|
|
blocks = json.loads(blocks)
|
|
## Add error: False to the blocks
|
|
for block in blocks:
|
|
block['error'] = False
|
|
except Exception as e:
|
|
parsed, unparsed = split_and_parse_json_objects(response.choices[0].message.content)
|
|
blocks = parsed
|
|
# Append all unparsed segments as onr error block and content is list of unparsed segments
|
|
if unparsed:
|
|
blocks.append({
|
|
"index": 0,
|
|
"error": True,
|
|
"tags": ["error"],
|
|
"content": unparsed
|
|
})
|
|
return blocks
|
|
|
|
def extract_blocks_batch(batch_data, provider = "groq/llama3-70b-8192", api_token = None):
|
|
api_token = os.getenv('GROQ_API_KEY', None) if not api_token else api_token
|
|
from litellm import batch_completion
|
|
messages = []
|
|
|
|
for url, html in batch_data:
|
|
variable_values = {
|
|
"URL": url,
|
|
"HTML": html,
|
|
}
|
|
|
|
prompt_with_variables = PROMPT_EXTRACT_BLOCKS
|
|
for variable in variable_values:
|
|
prompt_with_variables = prompt_with_variables.replace(
|
|
"{" + variable + "}", variable_values[variable]
|
|
)
|
|
|
|
messages.append([{"role": "user", "content": prompt_with_variables}])
|
|
|
|
|
|
responses = batch_completion(
|
|
model = provider,
|
|
messages = messages,
|
|
temperature = 0.01
|
|
)
|
|
|
|
all_blocks = []
|
|
for response in responses:
|
|
try:
|
|
blocks = extract_xml_data(["blocks"], response.choices[0].message.content)['blocks']
|
|
blocks = json.loads(blocks)
|
|
|
|
except Exception as e:
|
|
blocks = [{
|
|
"index": 0,
|
|
"tags": ["error"],
|
|
"content": ["Error extracting blocks from the HTML content. Choose another provider/model or try again."],
|
|
"questions": ["What went wrong during the block extraction process?"]
|
|
}]
|
|
all_blocks.append(blocks)
|
|
|
|
return sum(all_blocks, [])
|
|
|
|
def merge_chunks_based_on_token_threshold(chunks, token_threshold):
|
|
"""
|
|
Merges small chunks into larger ones based on the total token threshold.
|
|
|
|
:param chunks: List of text chunks to be merged based on token count.
|
|
:param token_threshold: Max number of tokens for each merged chunk.
|
|
:return: List of merged text chunks.
|
|
"""
|
|
merged_sections = []
|
|
current_chunk = []
|
|
total_token_so_far = 0
|
|
|
|
for chunk in chunks:
|
|
chunk_token_count = len(chunk.split()) * 1.3 # Estimate token count with a factor
|
|
if total_token_so_far + chunk_token_count < token_threshold:
|
|
current_chunk.append(chunk)
|
|
total_token_so_far += chunk_token_count
|
|
else:
|
|
if current_chunk:
|
|
merged_sections.append('\n\n'.join(current_chunk))
|
|
current_chunk = [chunk]
|
|
total_token_so_far = chunk_token_count
|
|
|
|
# Add the last chunk if it exists
|
|
if current_chunk:
|
|
merged_sections.append('\n\n'.join(current_chunk))
|
|
|
|
return merged_sections
|
|
|
|
def process_sections(url: str, sections: list, provider: str, api_token: str, base_url=None) -> list:
|
|
extracted_content = []
|
|
if provider.startswith("groq/"):
|
|
# Sequential processing with a delay
|
|
for section in sections:
|
|
extracted_content.extend(extract_blocks(url, section, provider, api_token, base_url=base_url))
|
|
time.sleep(0.5) # 500 ms delay between each processing
|
|
else:
|
|
# Parallel processing using ThreadPoolExecutor
|
|
with ThreadPoolExecutor() as executor:
|
|
futures = [executor.submit(extract_blocks, url, section, provider, api_token, base_url=base_url) for section in sections]
|
|
for future in as_completed(futures):
|
|
extracted_content.extend(future.result())
|
|
|
|
return extracted_content
|
|
|
|
def wrap_text(draw, text, font, max_width):
|
|
# Wrap the text to fit within the specified width
|
|
lines = []
|
|
words = text.split()
|
|
while words:
|
|
line = ''
|
|
while words and draw.textbbox((0, 0), line + words[0], font=font)[2] <= max_width:
|
|
line += (words.pop(0) + ' ')
|
|
lines.append(line)
|
|
return '\n'.join(lines)
|
|
|
|
def format_html(html_string):
|
|
soup = BeautifulSoup(html_string, 'lxml.parser')
|
|
return soup.prettify()
|
|
|
|
def fast_format_html(html_string):
|
|
"""
|
|
A fast HTML formatter that uses string operations instead of parsing.
|
|
|
|
Args:
|
|
html_string (str): The HTML string to format
|
|
|
|
Returns:
|
|
str: The formatted HTML string
|
|
"""
|
|
# Initialize variables
|
|
indent = 0
|
|
indent_str = " " # Two spaces for indentation
|
|
formatted = []
|
|
in_content = False
|
|
|
|
# Split by < and > to separate tags and content
|
|
parts = html_string.replace('>', '>\n').replace('<', '\n<').split('\n')
|
|
|
|
for part in parts:
|
|
if not part.strip():
|
|
continue
|
|
|
|
# Handle closing tags
|
|
if part.startswith('</'):
|
|
indent -= 1
|
|
formatted.append(indent_str * indent + part)
|
|
|
|
# Handle self-closing tags
|
|
elif part.startswith('<') and part.endswith('/>'):
|
|
formatted.append(indent_str * indent + part)
|
|
|
|
# Handle opening tags
|
|
elif part.startswith('<'):
|
|
formatted.append(indent_str * indent + part)
|
|
indent += 1
|
|
|
|
# Handle content between tags
|
|
else:
|
|
content = part.strip()
|
|
if content:
|
|
formatted.append(indent_str * indent + content)
|
|
|
|
return '\n'.join(formatted)
|
|
|
|
def normalize_url(href, base_url):
|
|
"""Normalize URLs to ensure consistent format"""
|
|
from urllib.parse import urljoin, urlparse
|
|
|
|
# Parse base URL to get components
|
|
parsed_base = urlparse(base_url)
|
|
if not parsed_base.scheme or not parsed_base.netloc:
|
|
raise ValueError(f"Invalid base URL format: {base_url}")
|
|
|
|
# Use urljoin to handle all cases
|
|
normalized = urljoin(base_url, href.strip())
|
|
return normalized
|
|
|
|
def normalize_url_tmp(href, base_url):
|
|
"""Normalize URLs to ensure consistent format"""
|
|
# Extract protocol and domain from base URL
|
|
try:
|
|
base_parts = base_url.split('/')
|
|
protocol = base_parts[0]
|
|
domain = base_parts[2]
|
|
except IndexError:
|
|
raise ValueError(f"Invalid base URL format: {base_url}")
|
|
|
|
# Handle special protocols
|
|
special_protocols = {'mailto:', 'tel:', 'ftp:', 'file:', 'data:', 'javascript:'}
|
|
if any(href.lower().startswith(proto) for proto in special_protocols):
|
|
return href.strip()
|
|
|
|
# Handle anchor links
|
|
if href.startswith('#'):
|
|
return f"{base_url}{href}"
|
|
|
|
# Handle protocol-relative URLs
|
|
if href.startswith('//'):
|
|
return f"{protocol}{href}"
|
|
|
|
# Handle root-relative URLs
|
|
if href.startswith('/'):
|
|
return f"{protocol}//{domain}{href}"
|
|
|
|
# Handle relative URLs
|
|
if not href.startswith(('http://', 'https://')):
|
|
# Remove leading './' if present
|
|
href = href.lstrip('./')
|
|
return f"{protocol}//{domain}/{href}"
|
|
|
|
return href.strip()
|
|
|
|
def is_external_url(url, base_domain):
|
|
"""Determine if a URL is external"""
|
|
special_protocols = {'mailto:', 'tel:', 'ftp:', 'file:', 'data:', 'javascript:'}
|
|
if any(url.lower().startswith(proto) for proto in special_protocols):
|
|
return True
|
|
|
|
try:
|
|
# Handle URLs with protocol
|
|
if url.startswith(('http://', 'https://')):
|
|
url_domain = url.split('/')[2]
|
|
return base_domain.lower() not in url_domain.lower()
|
|
except IndexError:
|
|
return False
|
|
|
|
return False
|
|
|
|
def clean_tokens(tokens: list[str]) -> list[str]:
|
|
# Set of tokens to remove
|
|
noise = {'ccp', 'up', '↑', '▲', '⬆️', 'a', 'an', 'at', 'by', 'in', 'of', 'on', 'to', 'the'}
|
|
|
|
STOP_WORDS = {
|
|
'a', 'an', 'and', 'are', 'as', 'at', 'be', 'by', 'for', 'from',
|
|
'has', 'he', 'in', 'is', 'it', 'its', 'of', 'on', 'that', 'the',
|
|
'to', 'was', 'were', 'will', 'with',
|
|
|
|
# Pronouns
|
|
'i', 'you', 'he', 'she', 'it', 'we', 'they',
|
|
'me', 'him', 'her', 'us', 'them',
|
|
'my', 'your', 'his', 'her', 'its', 'our', 'their',
|
|
'mine', 'yours', 'hers', 'ours', 'theirs',
|
|
'myself', 'yourself', 'himself', 'herself', 'itself', 'ourselves', 'themselves',
|
|
|
|
# Common verbs
|
|
'am', 'is', 'are', 'was', 'were', 'be', 'been', 'being',
|
|
'have', 'has', 'had', 'having', 'do', 'does', 'did', 'doing',
|
|
|
|
# Prepositions
|
|
'about', 'above', 'across', 'after', 'against', 'along', 'among', 'around',
|
|
'at', 'before', 'behind', 'below', 'beneath', 'beside', 'between', 'beyond',
|
|
'by', 'down', 'during', 'except', 'for', 'from', 'in', 'inside', 'into',
|
|
'near', 'of', 'off', 'on', 'out', 'outside', 'over', 'past', 'through',
|
|
'to', 'toward', 'under', 'underneath', 'until', 'up', 'upon', 'with', 'within',
|
|
|
|
# Conjunctions
|
|
'and', 'but', 'or', 'nor', 'for', 'yet', 'so',
|
|
'although', 'because', 'since', 'unless',
|
|
|
|
# Articles
|
|
'a', 'an', 'the',
|
|
|
|
# Other common words
|
|
'this', 'that', 'these', 'those',
|
|
'what', 'which', 'who', 'whom', 'whose',
|
|
'when', 'where', 'why', 'how',
|
|
'all', 'any', 'both', 'each', 'few', 'more', 'most', 'other', 'some', 'such',
|
|
'can', 'cannot', "can't", 'could', "couldn't",
|
|
'may', 'might', 'must', "mustn't",
|
|
'shall', 'should', "shouldn't",
|
|
'will', "won't", 'would', "wouldn't",
|
|
'not', "n't", 'no', 'nor', 'none'
|
|
}
|
|
|
|
# Single comprehension, more efficient than multiple passes
|
|
return [token for token in tokens
|
|
if len(token) > 2
|
|
and token not in noise
|
|
and token not in STOP_WORDS
|
|
and not token.startswith('↑')
|
|
and not token.startswith('▲')
|
|
and not token.startswith('⬆')]
|
|
|
|
|
|
def generate_content_hash(content: str) -> str:
|
|
"""Generate a unique hash for content"""
|
|
return xxhash.xxh64(content.encode()).hexdigest()
|
|
# return hashlib.sha256(content.encode()).hexdigest()
|
|
|
|
def ensure_content_dirs(base_path: str) -> Dict[str, str]:
|
|
"""Create content directories if they don't exist"""
|
|
dirs = {
|
|
'html': 'html_content',
|
|
'cleaned': 'cleaned_html',
|
|
'markdown': 'markdown_content',
|
|
'extracted': 'extracted_content',
|
|
'screenshots': 'screenshots'
|
|
}
|
|
|
|
content_paths = {}
|
|
for key, dirname in dirs.items():
|
|
path = os.path.join(base_path, dirname)
|
|
os.makedirs(path, exist_ok=True)
|
|
content_paths[key] = path
|
|
|
|
return content_paths |