import os os.system("playwright install") import re import urllib.parse import asyncio from typing import Dict, Optional from itertools import cycle import gradio as gr from bs4 import BeautifulSoup, NavigableString from playwright.async_api import async_playwright, TimeoutError as PlaywrightTimeoutError class CredentialRevolver: def __init__(self, proxy_string: str): self.proxies = self._parse_proxies(proxy_string) self.proxy_cycler = cycle(self.proxies) if self.proxies else None def _parse_proxies(self, proxy_string: str): proxies = [] if not proxy_string: return proxies for line in proxy_string.strip().splitlines(): try: parsed = urllib.parse.urlparse(f"//{line.strip()}") if not parsed.hostname or not parsed.port: continue server = f"http://{parsed.hostname}:{parsed.port}" proxy_dict = {"server": server} if parsed.username: proxy_dict["username"] = urllib.parse.unquote(parsed.username) if parsed.password: proxy_dict["password"] = urllib.parse.unquote(parsed.password) proxies.append(proxy_dict) except Exception: pass return proxies def get_next(self) -> Optional[Dict]: return next(self.proxy_cycler) if self.proxy_cycler else None def count(self) -> int: return len(self.proxies) PLAYWRIGHT_STATE: Dict = {} REVOLVER = CredentialRevolver(os.getenv("PROXY_LIST", "")) SEARCH_ENGINES = { "Google": "https://www.google.com/search?q={query}&hl=en", "DuckDuckGo": "https://duckduckgo.com/html/?q={query}", "Bing": "https://www.bing.com/search?q={query}", "Brave": "https://search.brave.com/search?q={query}", "Ecosia": "https://www.ecosia.org/search?q={query}", "Yahoo": "https://search.yahoo.com/search?p={query}", "Startpage": "https://www.startpage.com/sp/search?q={query}", "Qwant": "https://www.qwant.com/?q={query}", "Swisscows": "https://swisscows.com/web?query={query}", "You.com": "https://you.com/search?q={query}", "SearXNG": "https://searx.be/search?q={query}", "MetaGer": "https://metager.org/meta/meta.ger-en?eingabe={query}", "Yandex": "https://yandex.com/search/?text={query}", "Baidu": "https://www.baidu.com/s?wd={query}", "Perplexity": "https://www.perplexity.ai/search?q={query}", } class HTML_TO_MARKDOWN_CONVERTER: def __init__(self, soup: BeautifulSoup, base_url: str): self.soup = soup self.base_url = base_url def _cleanup_html(self): selectors_to_remove = ['nav', 'footer', 'header', 'aside', 'form', 'script', 'style', 'svg', 'button', 'input', 'textarea', '[role="navigation"]', '[role="search"]', '[id*="comment"]', '[class*="comment-"]', '[id*="sidebar"]', '[class*="sidebar"]', '[id*="related"]', '[class*="related"]', '[id*="share"]', '[class*="share"]', '[id*="social"]', '[class*="social"]', '[id*="cookie"]', '[class*="cookie"]', '[aria-hidden="true"]'] for selector in selectors_to_remove: for element in self.soup.select(selector): element.decompose() def convert(self): self._cleanup_html() content_node = self.soup.find('main') or self.soup.find('article') or self.soup.find('body') if not content_node: return "" md = self._process_node(content_node) return re.sub(r'\n{3,}', '\n\n', md).strip() def _process_node(self, element): if isinstance(element, NavigableString): return re.sub(r'\s+', ' ', element.strip()) if element.name is None or not element.name: return '' inner_md = " ".join(self._process_node(child) for child in element.children).strip() if element.name in ['p', 'div', 'section']: return f"\n\n{inner_md}\n\n" if element.name == 'h1': return f"\n\n# {inner_md}\n\n" if element.name == 'h2': return f"\n\n## {inner_md}\n\n" if element.name == 'h3': return f"\n\n### {inner_md}\n\n" if element.name in ['h4', 'h5', 'h6']: return f"\n\n#### {inner_md}\n\n" if element.name == 'li': return f"* {inner_md}\n" if element.name in ['ul', 'ol']: return f"\n{inner_md}\n" if element.name == 'blockquote': return f"> {inner_md.replace(chr(10), chr(10) + '> ')}\n\n" if element.name == 'hr': return "\n\n---\n\n" if element.name == 'table': header = " | ".join(f"**{th.get_text(strip=True)}**" for th in element.select('thead th, tr th')) separator = " | ".join(['---'] * len(header.split('|'))) rows = [" | ".join(td.get_text(strip=True) for td in tr.find_all('td')) for tr in element.select('tbody tr')] return f"\n\n{header}\n{separator}\n" + "\n".join(rows) + "\n\n" if element.name == 'pre': return f"\n```\n{element.get_text(strip=True)}\n```\n\n" if element.name == 'code': return f"`{inner_md}`" if element.name in ['strong', 'b']: return f"**{inner_md}**" if element.name in ['em', 'i']: return f"*{inner_md}*" if element.name == 'a': href = element.get('href', '') full_href = urllib.parse.urljoin(self.base_url, href) return f"[{inner_md}]({full_href})" if element.name == 'img': src = element.get('src', '') alt = element.get('alt', 'Image').strip() full_src = urllib.parse.urljoin(self.base_url, src) return f"\n\n![{alt}]({full_src})\n\n" return inner_md async def perform_web_browse(action: str, query: str, browser_name: str, search_engine_name: str): browser_key = browser_name.lower() if "playwright" not in PLAYWRIGHT_STATE: PLAYWRIGHT_STATE["playwright"] = await async_playwright().start() if browser_key not in PLAYWRIGHT_STATE: try: p = PLAYWRIGHT_STATE["playwright"] if browser_key == 'firefox': browser_instance = await p.firefox.launch(headless=True) elif browser_key == 'chromium': browser_instance = await p.chromium.launch(headless=True) elif browser_key == 'webkit': browser_instance = await p.webkit.launch(headless=True) else: raise ValueError(f"Invalid browser name: {browser_name}") PLAYWRIGHT_STATE[browser_key] = browser_instance except Exception as e: return {"status": "error", "query": query, "error_message": f"Failed to launch '{browser_key}'. Error: {str(e).splitlines()[0]}"} browser_instance = PLAYWRIGHT_STATE[browser_key] if action == "Scrape URL": if not query.startswith(('http://', 'https://')): url = f"http://{query}" else: url = query else: # action == "Search" url_template = SEARCH_ENGINES.get(search_engine_name) if not url_template: return {"status": "error", "query": query, "error_message": f"Invalid search engine: '{search_engine_name}'."} url = url_template.format(query=urllib.parse.quote_plus(query)) proxy_config = REVOLVER.get_next() proxy_server_used = proxy_config["server"] if proxy_config else "Direct Connection" context_args = {'user_agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36', 'java_script_enabled': True, 'ignore_https_errors': True, 'bypass_csp': True, 'accept_downloads': False} if proxy_config: context_args['proxy'] = proxy_config context = await browser_instance.new_context(**context_args) page = await context.new_page() try: response = await page.goto(url, wait_until='domcontentloaded', timeout=25000) html_content = await page.content() if any(phrase in html_content for phrase in ["unusual traffic", "CAPTCHA", "are you human", "not a robot"]): raise Exception(f"Anti-bot measure detected on {page.url}. Try another search engine or proxy.") final_url, title = page.url, await page.title() or "No Title" soup = BeautifulSoup(html_content, 'lxml') converter = HTML_TO_MARKDOWN_CONVERTER(soup, base_url=final_url) markdown_text = converter.convert() status_code = response.status if response else 0 return {"status": "success", "query": query, "action": action, "final_url": final_url, "page_title": title, "http_status": status_code, "proxy_used": proxy_server_used, "markdown_content": markdown_text} except Exception as e: error_message = str(e).splitlines()[0] if "Timeout" in error_message: return {"status": "error", "query": query, "proxy_used": proxy_server_used, "error_message": f"Navigation Timeout: The page for '{query}' took too long to load."} return {"status": "error", "query": query, "proxy_used": proxy_server_used, "error_message": error_message} finally: if 'page' in locals() and not page.is_closed(): await page.close() if 'context' in locals(): await context.close() with gr.Blocks(title="Web Browse API", theme=gr.themes.Soft()) as demo: gr.Markdown("# Web Browse API") gr.Markdown(f"This interface exposes a stateless API endpoint (`/api/web_browse`) to fetch and parse web content. {REVOLVER.count()} proxies loaded.") action_input = gr.Radio(label="Action", choices=["Search", "Scrape URL"], value="Search") query_input = gr.Textbox(label="Query or URL", placeholder="e.g., 'best cat food' or 'www.wikipedia.org'") with gr.Row(): browser_input = gr.Dropdown(label="Browser", choices=["firefox", "chromium", "webkit"], value="firefox", scale=1) search_engine_input = gr.Dropdown(label="Search Engine (if action is Search)", choices=sorted(list(SEARCH_ENGINES.keys())), value="DuckDuckGo", scale=2) submit_button = gr.Button("Browse", variant="primary") output_json = gr.JSON(label="API Result") submit_button.click(fn=perform_web_browse, inputs=[action_input, query_input, browser_input, search_engine_input], outputs=output_json, api_name="web_browse") if __name__ == "__main__": demo.launch(mcp_server=True)