{"id":47888,"date":"2025-07-30T09:41:51","date_gmt":"2025-07-30T01:41:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/47888.html"},"modified":"2025-07-30T09:41:51","modified_gmt":"2025-07-30T01:41:51","slug":"%e3%80%90%e7%bd%91%e7%bb%9c%e4%b8%8e%e7%88%ac%e8%99%ab-31%e3%80%91ai%e9%a9%b1%e5%8a%a8%e7%9a%84%e7%bd%91%e9%a1%b5%e5%86%85%e5%ae%b9%e6%8f%90%e5%8f%96%e9%9d%a9%e5%91%bd%ef%bc%9acrawl4ai%e8%ae%a9","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/47888.html","title":{"rendered":"\u3010\u7f51\u7edc\u4e0e\u722c\u866b 31\u3011AI\u9a71\u52a8\u7684\u7f51\u9875\u5185\u5bb9\u63d0\u53d6\u9769\u547d\uff1aCrawl4AI\u8ba9\u6570\u636e\u91c7\u96c6\u667a\u80fd\u5316"},"content":{"rendered":"<h2>AI\u9a71\u52a8\u7684\u7f51\u9875\u5185\u5bb9\u63d0\u53d6\u9769\u547d&#xff1a;Crawl4AI\u8ba9\u6570\u636e\u91c7\u96c6\u667a\u80fd\u5316<\/h2>\n<p>\u5173\u952e\u8bcd&#xff1a;Crawl4AI, AI\u722c\u866b, \u7f51\u9875\u5185\u5bb9\u63d0\u53d6, \u5927\u8bed\u8a00\u6a21\u578b, \u667a\u80fd\u722c\u866b, Python\u722c\u866b, \u673a\u5668\u5b66\u4e60\u722c\u866b, \u81ea\u52a8\u5316\u6570\u636e\u91c7\u96c6<\/p>\n<p>\u6458\u8981&#xff1a;Crawl4AI\u662f\u4e00\u4e2a\u9769\u547d\u6027\u7684AI\u9a71\u52a8\u7f51\u9875\u5185\u5bb9\u63d0\u53d6\u6846\u67b6&#xff0c;\u5b83\u7ed3\u5408\u4e86\u5927\u8bed\u8a00\u6a21\u578b\u7684\u667a\u80fd\u7406\u89e3\u80fd\u529b\u4e0e\u4f20\u7edf\u722c\u866b\u7684\u9ad8\u6548\u6027\u80fd\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8Crawl4AI\u7684\u6838\u5fc3\u539f\u7406\u3001\u5b9e\u9645\u5e94\u7528\u573a\u666f&#xff0c;\u4ee5\u53ca\u5982\u4f55\u5229\u7528\u8fd9\u4e00\u5de5\u5177\u5b9e\u73b0\u667a\u80fd\u5316\u7684\u6570\u636e\u91c7\u96c6&#xff0c;\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b8c\u6574\u6307\u5357\u3002<\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>AI\u9a71\u52a8\u7684\u7f51\u9875\u5185\u5bb9\u63d0\u53d6\u9769\u547d&#xff1a;Crawl4AI\u8ba9\u6570\u636e\u91c7\u96c6\u667a\u80fd\u5316<\/li>\n<li>\n<ul>\n<li>\u4e3a\u4ec0\u4e48\u4f20\u7edf\u722c\u866b\u5df2\u7ecf\u4e0d\u591f\u7528\u4e86&#xff1f;<\/li>\n<li>\n<ul>\n<li>\u4f20\u7edf\u722c\u866b\u7684\u4e09\u5927\u75db\u70b9<\/li>\n<\/ul>\n<\/li>\n<li>\u4ec0\u4e48\u662fCrawl4AI&#xff1f;<\/li>\n<li>\n<ul>\n<li>Crawl4AI\u7684\u6838\u5fc3\u7279\u6027<\/li>\n<\/ul>\n<\/li>\n<li>\u5feb\u901f\u4e0a\u624b&#xff1a;\u7b2c\u4e00\u4e2aCrawl4AI\u7a0b\u5e8f<\/li>\n<li>\n<ul>\n<li>\u5b89\u88c5Crawl4AI<\/li>\n<li>\u57fa\u7840\u4f7f\u7528\u793a\u4f8b<\/li>\n<\/ul>\n<\/li>\n<li>AI\u667a\u80fd\u63d0\u53d6&#xff1a;\u8ba9\u722c\u866b\u7406\u89e3\u5185\u5bb9\u542b\u4e49<\/li>\n<li>\n<ul>\n<li>\u4f7f\u7528LLM\u63d0\u53d6\u7b56\u7565<\/li>\n<li>\u667a\u80fd\u5185\u5bb9\u8fc7\u6ee4<\/li>\n<\/ul>\n<\/li>\n<li>\u9ad8\u7ea7\u5e94\u7528&#xff1a;\u6784\u5efa\u667a\u80fd\u6570\u636e\u91c7\u96c6\u7cfb\u7edf<\/li>\n<li>\n<ul>\n<li>\u591a\u9875\u9762\u6279\u91cf\u91c7\u96c6<\/li>\n<li>\u5904\u7406\u52a8\u6001\u5185\u5bb9<\/li>\n<\/ul>\n<\/li>\n<li>\u5b9e\u6218\u6848\u4f8b&#xff1a;\u6784\u5efa\u7535\u5546\u5546\u54c1\u76d1\u63a7\u7cfb\u7edf<\/li>\n<li>\n<ul>\n<li>\u9879\u76ee\u7ed3\u6784\u8bbe\u8ba1<\/li>\n<\/ul>\n<\/li>\n<li>\u6027\u80fd\u4f18\u5316\u4e0e\u6700\u4f73\u5b9e\u8df5<\/li>\n<li>\n<ul>\n<li>1. \u5e76\u53d1\u63a7\u5236<\/li>\n<li>2. \u7f13\u5b58\u7b56\u7565<\/li>\n<li>3. \u9519\u8bef\u5904\u7406\u4e0e\u91cd\u8bd5<\/li>\n<\/ul>\n<\/li>\n<li>\u4e0e\u5176\u4ed6\u6846\u67b6\u7684\u5bf9\u6bd4<\/li>\n<li>\n<ul>\n<li>Crawl4AI vs \u4f20\u7edf\u722c\u866b\u6846\u67b6<\/li>\n<li>\u9009\u62e9\u5efa\u8bae<\/li>\n<\/ul>\n<\/li>\n<li>\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848<\/li>\n<li>\n<ul>\n<li>Q1: \u5982\u4f55\u5904\u7406\u9700\u8981\u767b\u5f55\u7684\u7f51\u7ad9&#xff1f;<\/li>\n<li>Q2: \u5982\u4f55\u5904\u7406\u53cd\u722c\u866b\u673a\u5236&#xff1f;<\/li>\n<li>Q3: \u5982\u4f55\u4f18\u5316\u5927\u89c4\u6a21\u722c\u53d6\u7684\u5185\u5b58\u4f7f\u7528&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u672a\u6765\u53d1\u5c55\u8d8b\u52bf<\/li>\n<li>\n<ul>\n<li>1. \u591a\u6a21\u6001\u5185\u5bb9\u63d0\u53d6<\/li>\n<li>2. \u66f4\u667a\u80fd\u7684\u53cd\u722c\u866b\u7ed5\u8fc7<\/li>\n<li>3. \u5b9e\u65f6\u6d41\u5f0f\u5904\u7406<\/li>\n<\/ul>\n<\/li>\n<li>\u603b\u7ed3\u4e0e\u5c55\u671b<\/li>\n<li>\n<ul>\n<li>\u6838\u5fc3\u4f18\u52bf\u56de\u987e<\/li>\n<li>\u5e94\u7528\u524d\u666f<\/li>\n<li>\u5b66\u4e60\u5efa\u8bae<\/li>\n<\/ul>\n<\/li>\n<li>\u53c2\u8003\u8d44\u6599\u4e0e\u6269\u5c55\u9605\u8bfb<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u4e3a\u4ec0\u4e48\u4f20\u7edf\u722c\u866b\u5df2\u7ecf\u4e0d\u591f\u7528\u4e86&#xff1f;<\/h3>\n<p>\u60f3\u8c61\u4e00\u4e0b&#xff0c;\u4f60\u662f\u4e00\u540d\u56fe\u4e66\u7ba1\u7406\u5458&#xff0c;\u6bcf\u5929\u9700\u8981\u4ece\u6570\u5343\u672c\u4e66\u4e2d\u627e\u51fa\u7279\u5b9a\u4fe1\u606f\u3002\u4f20\u7edf\u7684\u65b9\u6cd5\u662f\u9010\u9875\u7ffb\u9605&#xff0c;\u5bfb\u627e\u5173\u952e\u8bcd&#xff0c;\u8fd9\u5c31\u50cf\u6211\u4eec\u4f20\u7edf\u7684\u7f51\u9875\u722c\u866b\u2014\u2014\u53ea\u80fd\u901a\u8fc7CSS\u9009\u62e9\u5668\u548cXPath\u6765&#034;\u76f2\u76ee&#034;\u5730\u63d0\u53d6\u9884\u5b9a\u4e49\u4f4d\u7f6e\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u4f46\u662f&#xff0c;\u5982\u679c\u6709\u4e00\u4e2a\u667a\u80fd\u52a9\u624b\u80fd\u591f\u7406\u89e3\u4e66\u7c4d\u5185\u5bb9\u7684\u542b\u4e49&#xff0c;\u81ea\u52a8\u8bc6\u522b\u4f60\u771f\u6b63\u9700\u8981\u7684\u4fe1\u606f\u5462&#xff1f;\u8fd9\u5c31\u662fCrawl4AI\u5e26\u6765\u7684\u9769\u547d\u6027\u53d8\u5316\u3002<\/p>\n<h4>\u4f20\u7edf\u722c\u866b\u7684\u4e09\u5927\u75db\u70b9<\/h4>\n<li>\u7ed3\u6784\u4f9d\u8d56\u6027\u5f3a&#xff1a;\u7f51\u7ad9\u7ed3\u6784\u4e00\u53d8&#xff0c;\u722c\u866b\u5c31\u5931\u6548<\/li>\n<li>\u8bed\u4e49\u7406\u89e3\u7f3a\u5931&#xff1a;\u65e0\u6cd5\u7406\u89e3\u5185\u5bb9\u7684\u771f\u6b63\u542b\u4e49<\/li>\n<li>\u7ef4\u62a4\u6210\u672c\u9ad8&#xff1a;\u9700\u8981\u4e0d\u65ad\u8c03\u6574\u9009\u62e9\u5668\u548c\u89c4\u5219<\/li>\n<h3>\u4ec0\u4e48\u662fCrawl4AI&#xff1f;<\/h3>\n<p>Crawl4AI\u662f\u4e00\u4e2a\u5f00\u6e90\u7684Python\u6846\u67b6&#xff0c;\u5b83\u5c06\u5927\u8bed\u8a00\u6a21\u578b&#xff08;LLM&#xff09;\u7684\u667a\u80fd\u7406\u89e3\u80fd\u529b\u4e0e\u7f51\u9875\u722c\u53d6\u6280\u672f\u5b8c\u7f8e\u7ed3\u5408\u3002\u7b80\u5355\u6765\u8bf4&#xff0c;\u5b83\u5c31\u50cf\u7ed9\u4f20\u7edf\u722c\u866b\u88c5\u4e0a\u4e86&#034;\u5927\u8111&#034;&#xff0c;\u8ba9\u722c\u866b\u80fd\u591f\u50cf\u4eba\u7c7b\u4e00\u6837\u7406\u89e3\u7f51\u9875\u5185\u5bb9\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730014147-6889785bcb74b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h4>Crawl4AI\u7684\u6838\u5fc3\u7279\u6027<\/h4>\n<ul>\n<li>AI\u9a71\u52a8\u7684\u5185\u5bb9\u63d0\u53d6&#xff1a;\u4f7f\u7528LLM\u7406\u89e3\u548c\u63d0\u53d6\u7f51\u9875\u5185\u5bb9<\/li>\n<li>\u667a\u80fd\u5185\u5bb9\u8fc7\u6ee4&#xff1a;\u81ea\u52a8\u8bc6\u522b\u5e76\u63d0\u53d6\u6709\u4ef7\u503c\u7684\u4fe1\u606f<\/li>\n<li>\u591a\u79cd\u63d0\u53d6\u7b56\u7565&#xff1a;\u652f\u6301LLM\u3001CSS\u9009\u62e9\u5668\u3001JavaScript\u7b49\u591a\u79cd\u65b9\u5f0f<\/li>\n<li>\u5f02\u6b65\u5904\u7406&#xff1a;\u9ad8\u6027\u80fd\u7684\u5f02\u6b65\u722c\u53d6\u80fd\u529b<\/li>\n<li>\u591a\u5a92\u4f53\u652f\u6301&#xff1a;\u53ef\u5904\u7406\u6587\u672c\u3001\u56fe\u7247\u3001\u94fe\u63a5\u7b49\u591a\u79cd\u5185\u5bb9\u7c7b\u578b<\/li>\n<\/ul>\n<h3>\u5feb\u901f\u4e0a\u624b&#xff1a;\u7b2c\u4e00\u4e2aCrawl4AI\u7a0b\u5e8f<\/h3>\n<p>\u8ba9\u6211\u4eec\u4ece\u6700\u7b80\u5355\u7684\u4f8b\u5b50\u5f00\u59cb&#xff0c;\u770b\u770bCrawl4AI\u662f\u5982\u4f55\u5de5\u4f5c\u7684\u3002<\/p>\n<h4>\u5b89\u88c5Crawl4AI<\/h4>\n<p>pip <span class=\"token function\">install<\/span> crawl4ai<\/p>\n<h4>\u57fa\u7840\u4f7f\u7528\u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai <span class=\"token keyword\">import<\/span> AsyncWebCrawler<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">basic_crawl<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span>verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u7b80\u5355\u722c\u53d6\u7f51\u9875<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/www.example.com&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>markdown<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u8fd0\u884c\u722c\u866b<\/span><br \/>\nasyncio<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>basic_crawl<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u8fd9\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u5c31\u80fd\u5c06\u7f51\u9875\u5185\u5bb9\u8f6c\u6362\u4e3a\u7ed3\u6784\u5316\u7684Markdown\u683c\u5f0f\u3002\u4f46\u8fd9\u53ea\u662f\u51b0\u5c71\u4e00\u89d2&#xff01;<\/p>\n<h3>AI\u667a\u80fd\u63d0\u53d6&#xff1a;\u8ba9\u722c\u866b\u7406\u89e3\u5185\u5bb9\u542b\u4e49<\/h3>\n<p>\u4f20\u7edf\u722c\u866b\u5c31\u50cf\u662f\u7528\u56fa\u5b9a\u6a21\u677f\u5957\u53d6\u5185\u5bb9&#xff0c;\u800cCrawl4AI\u66f4\u50cf\u662f\u4e00\u4e2a\u667a\u80fd\u9605\u8bfb\u8005\u3002\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u5229\u7528AI\u8fdb\u884c\u667a\u80fd\u5185\u5bb9\u63d0\u53d6\u3002<\/p>\n<h4>\u4f7f\u7528LLM\u63d0\u53d6\u7b56\u7565<\/h4>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai <span class=\"token keyword\">import<\/span> AsyncWebCrawler<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai<span class=\"token punctuation\">.<\/span>extraction_strategy <span class=\"token keyword\">import<\/span> LLMExtractionStrategy<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">llm_extraction<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u5b9a\u4e49\u63d0\u53d6\u7b56\u7565<\/span><br \/>\n    strategy <span class=\"token operator\">&#061;<\/span> LLMExtractionStrategy<span class=\"token punctuation\">(<\/span><br \/>\n        provider<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ollama\/llama2&#034;<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\"># \u53ef\u4ee5\u4f7f\u7528\u672c\u5730\u6a21\u578b<\/span><br \/>\n        api_token<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;your-api-token&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        instruction<span class=\"token operator\">&#061;<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n        \u4ece\u8fd9\u4e2a\u7f51\u9875\u4e2d\u63d0\u53d6\u6240\u6709\u4ea7\u54c1\u4fe1\u606f&#xff0c;\u5305\u62ec&#xff1a;<br \/>\n        1. \u4ea7\u54c1\u540d\u79f0<br \/>\n        2. \u4ef7\u683c<br \/>\n        3. \u4ea7\u54c1\u63cf\u8ff0<br \/>\n        4. \u7528\u6237\u8bc4\u5206<br \/>\n        \u8bf7\u4ee5JSON\u683c\u5f0f\u8fd4\u56de\u7ed3\u679c\u3002<br \/>\n        &#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span>verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span><br \/>\n            url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example-shop.com&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            extraction_strategy<span class=\"token operator\">&#061;<\/span>strategy<br \/>\n        <span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u63d0\u53d6\u7684\u4ea7\u54c1\u4fe1\u606f&#xff1a;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>extracted_content<span class=\"token punctuation\">)<\/span><\/p>\n<p>asyncio<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>llm_extraction<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730014148-6889785c96c62.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h4>\u667a\u80fd\u5185\u5bb9\u8fc7\u6ee4<\/h4>\n<p>Crawl4AI\u8fd8\u80fd\u667a\u80fd\u5730\u8fc7\u6ee4\u6389\u5e7f\u544a\u3001\u5bfc\u822a\u680f\u7b49\u65e0\u5173\u5185\u5bb9&#xff1a;<\/p>\n<p><span class=\"token keyword\">from<\/span> crawl4ai<span class=\"token punctuation\">.<\/span>content_filter <span class=\"token keyword\">import<\/span> PruningContentFilter<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">smart_filtering<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u521b\u5efa\u5185\u5bb9\u8fc7\u6ee4\u5668<\/span><br \/>\n    content_filter <span class=\"token operator\">&#061;<\/span> PruningContentFilter<span class=\"token punctuation\">(<\/span><br \/>\n        threshold<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0.48<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\"># \u5185\u5bb9\u76f8\u5173\u6027\u9608\u503c<\/span><br \/>\n        threshold_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;fixed&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        min_word_threshold<span class=\"token operator\">&#061;<\/span><span class=\"token number\">0<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span>verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span><br \/>\n            url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/news-website.com&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            content_filter<span class=\"token operator\">&#061;<\/span>content_filter<br \/>\n        <span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u53ea\u8fd4\u56de\u9ad8\u8d28\u91cf\u7684\u4e3b\u8981\u5185\u5bb9<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>cleaned_html<span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u9ad8\u7ea7\u5e94\u7528&#xff1a;\u6784\u5efa\u667a\u80fd\u6570\u636e\u91c7\u96c6\u7cfb\u7edf<\/h3>\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u6784\u5efa\u4e00\u4e2a\u66f4\u590d\u6742\u7684\u5e94\u7528\u2014\u2014\u667a\u80fd\u65b0\u95fb\u91c7\u96c6\u7cfb\u7edf\u3002<\/p>\n<h4>\u591a\u9875\u9762\u6279\u91cf\u91c7\u96c6<\/h4>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai <span class=\"token keyword\">import<\/span> AsyncWebCrawler<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai<span class=\"token punctuation\">.<\/span>extraction_strategy <span class=\"token keyword\">import<\/span> JsonCssExtractionStrategy<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">news_crawler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u5b9a\u4e49\u65b0\u95fb\u63d0\u53d6\u89c4\u5219<\/span><br \/>\n    schema <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u65b0\u95fb\u6587\u7ae0&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;baseSelector&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;article&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;fields&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u6807\u9898&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;selector&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;h1&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u4f5c\u8005&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;selector&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;.author&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u53d1\u5e03\u65f6\u95f4&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;selector&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;.publish-date&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u5185\u5bb9&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;selector&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;.content&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;text&#034;<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u6807\u7b7e&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;selector&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;.tags a&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;type&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;list&#034;<\/span><span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">]<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    extraction_strategy <span class=\"token operator\">&#061;<\/span> JsonCssExtractionStrategy<span class=\"token punctuation\">(<\/span>schema<span class=\"token punctuation\">)<\/span><\/p>\n<p>    news_urls <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n        <span class=\"token string\">&#034;https:\/\/news-site.com\/article1&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;https:\/\/news-site.com\/article2&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;https:\/\/news-site.com\/article3&#034;<\/span><br \/>\n    <span class=\"token punctuation\">]<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span>verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u6279\u91cf\u722c\u53d6\u65b0\u95fb<\/span><br \/>\n        tasks <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> url <span class=\"token keyword\">in<\/span> news_urls<span class=\"token punctuation\">:<\/span><br \/>\n            task <span class=\"token operator\">&#061;<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span><br \/>\n                url<span class=\"token operator\">&#061;<\/span>url<span class=\"token punctuation\">,<\/span><br \/>\n                extraction_strategy<span class=\"token operator\">&#061;<\/span>extraction_strategy<br \/>\n            <span class=\"token punctuation\">)<\/span><br \/>\n            tasks<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>task<span class=\"token punctuation\">)<\/span><\/p>\n<p>        results <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> asyncio<span class=\"token punctuation\">.<\/span>gather<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>tasks<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u5904\u7406\u7ed3\u679c<\/span><br \/>\n        all_articles <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> result <span class=\"token keyword\">in<\/span> results<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> result<span class=\"token punctuation\">.<\/span>success<span class=\"token punctuation\">:<\/span><br \/>\n                articles <span class=\"token operator\">&#061;<\/span> json<span class=\"token punctuation\">.<\/span>loads<span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>extracted_content<span class=\"token punctuation\">)<\/span><br \/>\n                all_articles<span class=\"token punctuation\">.<\/span>extend<span class=\"token punctuation\">(<\/span>articles<span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> all_articles<\/p>\n<h4>\u5904\u7406\u52a8\u6001\u5185\u5bb9<\/h4>\n<p>\u5bf9\u4e8e\u9700\u8981JavaScript\u6e32\u67d3\u7684\u9875\u9762&#xff0c;Crawl4AI\u540c\u6837\u6e38\u5203\u6709\u4f59&#xff1a;<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">dynamic_content_crawl<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span><br \/>\n        browser_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;chromium&#034;<\/span><span class=\"token punctuation\">,<\/span>  <span class=\"token comment\"># \u4f7f\u7528Chromium\u6d4f\u89c8\u5668<\/span><br \/>\n        headless<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u7b49\u5f85\u9875\u9762\u5b8c\u5168\u52a0\u8f7d<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span><br \/>\n            url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/spa-website.com&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            js_code<span class=\"token operator\">&#061;<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n            \/\/ \u7b49\u5f85\u6570\u636e\u52a0\u8f7d\u5b8c\u6210<br \/>\n            await new Promise(resolve &#061;&gt; {<br \/>\n                const checkData &#061; () &#061;&gt; {<br \/>\n                    if (document.querySelector(&#039;.data-loaded&#039;)) {<br \/>\n                        resolve();<br \/>\n                    } else {<br \/>\n                        setTimeout(checkData, 100);<br \/>\n                    }<br \/>\n                };<br \/>\n                checkData();<br \/>\n            });<br \/>\n            &#034;&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            wait_for<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;networkidle&#034;<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> result<span class=\"token punctuation\">.<\/span>markdown<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/07\/20250730014149-6889785d52edb.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>\u5b9e\u6218\u6848\u4f8b&#xff1a;\u6784\u5efa\u7535\u5546\u5546\u54c1\u76d1\u63a7\u7cfb\u7edf<\/h3>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u5b8c\u6574\u7684\u5b9e\u6218\u6848\u4f8b\u6765\u5c55\u793aCrawl4AI\u7684\u5f3a\u5927\u529f\u80fd\u3002\u6211\u4eec\u5c06\u6784\u5efa\u4e00\u4e2a\u7535\u5546\u5546\u54c1\u4ef7\u683c\u76d1\u63a7\u7cfb\u7edf\u3002<\/p>\n<h4>\u9879\u76ee\u7ed3\u6784\u8bbe\u8ba1<\/h4>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">import<\/span> json<br \/>\n<span class=\"token keyword\">import<\/span> sqlite3<br \/>\n<span class=\"token keyword\">from<\/span> datetime <span class=\"token keyword\">import<\/span> datetime<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai <span class=\"token keyword\">import<\/span> AsyncWebCrawler<br \/>\n<span class=\"token keyword\">from<\/span> crawl4ai<span class=\"token punctuation\">.<\/span>extraction_strategy <span class=\"token keyword\">import<\/span> LLMExtractionStrategy<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ProductMonitor<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> db_path<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;products.db&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>db_path <span class=\"token operator\">&#061;<\/span> db_path<br \/>\n        self<span class=\"token punctuation\">.<\/span>init_database<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">init_database<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u521d\u59cb\u5316\u6570\u636e\u5e93&#034;&#034;&#034;<\/span><br \/>\n        conn <span class=\"token operator\">&#061;<\/span> sqlite3<span class=\"token punctuation\">.<\/span>connect<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>db_path<span class=\"token punctuation\">)<\/span><br \/>\n        cursor <span class=\"token operator\">&#061;<\/span> conn<span class=\"token punctuation\">.<\/span>cursor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        cursor<span class=\"token punctuation\">.<\/span>execute<span class=\"token punctuation\">(<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n            CREATE TABLE IF NOT EXISTS products (<br \/>\n                id INTEGER PRIMARY KEY,<br \/>\n                name TEXT,<br \/>\n                price REAL,<br \/>\n                url TEXT,<br \/>\n                last_checked TIMESTAMP,<br \/>\n                price_history TEXT<br \/>\n            )<br \/>\n        &#034;&#034;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        conn<span class=\"token punctuation\">.<\/span>commit<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        conn<span class=\"token punctuation\">.<\/span>close<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">extract_product_info<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> url<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u63d0\u53d6\u5546\u54c1\u4fe1\u606f&#034;&#034;&#034;<\/span><br \/>\n        strategy <span class=\"token operator\">&#061;<\/span> LLMExtractionStrategy<span class=\"token punctuation\">(<\/span><br \/>\n            provider<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;ollama\/llama2&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            instruction<span class=\"token operator\">&#061;<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n            \u4ece\u8fd9\u4e2a\u5546\u54c1\u9875\u9762\u63d0\u53d6\u4ee5\u4e0b\u4fe1\u606f&#xff1a;<br \/>\n            1. \u5546\u54c1\u540d\u79f0<br \/>\n            2. \u5f53\u524d\u4ef7\u683c&#xff08;\u53ea\u63d0\u53d6\u6570\u5b57&#xff09;<br \/>\n            3. \u5546\u54c1\u63cf\u8ff0<br \/>\n            4. \u5e93\u5b58\u72b6\u6001<\/p>\n<p>            \u8bf7\u4ee5JSON\u683c\u5f0f\u8fd4\u56de&#xff1a;<br \/>\n            {<br \/>\n                &#034;name&#034;: &#034;\u5546\u54c1\u540d\u79f0&#034;,<br \/>\n                &#034;price&#034;: \u4ef7\u683c\u6570\u5b57,<br \/>\n                &#034;description&#034;: &#034;\u5546\u54c1\u63cf\u8ff0&#034;,<br \/>\n                &#034;in_stock&#034;: true\/false<br \/>\n            }<br \/>\n            &#034;&#034;&#034;<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span>verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n            result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span><br \/>\n                url<span class=\"token operator\">&#061;<\/span>url<span class=\"token punctuation\">,<\/span><br \/>\n                extraction_strategy<span class=\"token operator\">&#061;<\/span>strategy<br \/>\n            <span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> result<span class=\"token punctuation\">.<\/span>success<span class=\"token punctuation\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> json<span class=\"token punctuation\">.<\/span>loads<span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>extracted_content<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">None<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">monitor_products<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> urls<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u76d1\u63a7\u5546\u54c1\u4ef7\u683c\u53d8\u5316&#034;&#034;&#034;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> url <span class=\"token keyword\">in<\/span> urls<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                product_info <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> self<span class=\"token punctuation\">.<\/span>extract_product_info<span class=\"token punctuation\">(<\/span>url<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> product_info<span class=\"token punctuation\">:<\/span><br \/>\n                    self<span class=\"token punctuation\">.<\/span>save_product_data<span class=\"token punctuation\">(<\/span>url<span class=\"token punctuation\">,<\/span> product_info<span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u2705 \u6210\u529f\u76d1\u63a7\u5546\u54c1: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>product_info<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#039;name&#039;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">else<\/span><span class=\"token punctuation\">:<\/span><br \/>\n                    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u274c \u65e0\u6cd5\u63d0\u53d6\u5546\u54c1\u4fe1\u606f: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>url<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n                <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u274c \u76d1\u63a7\u51fa\u9519 <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>url<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">save_product_data<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> url<span class=\"token punctuation\">,<\/span> product_info<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u4fdd\u5b58\u5546\u54c1\u6570\u636e\u5230\u6570\u636e\u5e93&#034;&#034;&#034;<\/span><br \/>\n        conn <span class=\"token operator\">&#061;<\/span> sqlite3<span class=\"token punctuation\">.<\/span>connect<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>db_path<span class=\"token punctuation\">)<\/span><br \/>\n        cursor <span class=\"token operator\">&#061;<\/span> conn<span class=\"token punctuation\">.<\/span>cursor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u68c0\u67e5\u5546\u54c1\u662f\u5426\u5df2\u5b58\u5728<\/span><br \/>\n        cursor<span class=\"token punctuation\">.<\/span>execute<span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token string\">&#034;SELECT price_history FROM products WHERE url &#061; ?&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span>url<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> cursor<span class=\"token punctuation\">.<\/span>fetchone<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">if<\/span> result<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token comment\"># \u66f4\u65b0\u73b0\u6709\u5546\u54c1<\/span><br \/>\n            price_history <span class=\"token operator\">&#061;<\/span> json<span class=\"token punctuation\">.<\/span>loads<span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token keyword\">or<\/span> <span class=\"token string\">&#034;[]&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            price_history<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">:<\/span> product_info<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token string\">&#034;timestamp&#034;<\/span><span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">.<\/span>now<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>isoformat<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            cursor<span class=\"token punctuation\">.<\/span>execute<span class=\"token punctuation\">(<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n                UPDATE products<br \/>\n                SET price &#061; ?, last_checked &#061; ?, price_history &#061; ?<br \/>\n                WHERE url &#061; ?<br \/>\n            &#034;&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n                product_info<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                datetime<span class=\"token punctuation\">.<\/span>now<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                json<span class=\"token punctuation\">.<\/span>dumps<span class=\"token punctuation\">(<\/span>price_history<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                url<br \/>\n            <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">else<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token comment\"># \u63d2\u5165\u65b0\u5546\u54c1<\/span><br \/>\n            price_history <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">:<\/span> product_info<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                <span class=\"token string\">&#034;timestamp&#034;<\/span><span class=\"token punctuation\">:<\/span> datetime<span class=\"token punctuation\">.<\/span>now<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span>isoformat<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p>            cursor<span class=\"token punctuation\">.<\/span>execute<span class=\"token punctuation\">(<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n                INSERT INTO products (name, price, url, last_checked, price_history)<br \/>\n                VALUES (?, ?, ?, ?, ?)<br \/>\n            &#034;&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n                product_info<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                product_info<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                url<span class=\"token punctuation\">,<\/span><br \/>\n                datetime<span class=\"token punctuation\">.<\/span>now<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                json<span class=\"token punctuation\">.<\/span>dumps<span class=\"token punctuation\">(<\/span>price_history<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        conn<span class=\"token punctuation\">.<\/span>commit<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        conn<span class=\"token punctuation\">.<\/span>close<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\"># \u4f7f\u7528\u793a\u4f8b<\/span><br \/>\n<span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    monitor <span class=\"token operator\">&#061;<\/span> ProductMonitor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># \u8981\u76d1\u63a7\u7684\u5546\u54c1URL\u5217\u8868<\/span><br \/>\n    product_urls <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n        <span class=\"token string\">&#034;https:\/\/shop.example.com\/product1&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;https:\/\/shop.example.com\/product2&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;https:\/\/shop.example.com\/product3&#034;<\/span><br \/>\n    <span class=\"token punctuation\">]<\/span><\/p>\n<p>    <span class=\"token comment\"># \u5f00\u59cb\u76d1\u63a7<\/span><br \/>\n    <span class=\"token keyword\">await<\/span> monitor<span class=\"token punctuation\">.<\/span>monitor_products<span class=\"token punctuation\">(<\/span>product_urls<span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> __name__ <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;__main__&#034;<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    asyncio<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span>main<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h3>\u6027\u80fd\u4f18\u5316\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h3>\n<h4>1. \u5e76\u53d1\u63a7\u5236<\/h4>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">from<\/span> asyncio <span class=\"token keyword\">import<\/span> Semaphore<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">controlled_crawling<\/span><span class=\"token punctuation\">(<\/span>urls<span class=\"token punctuation\">,<\/span> max_concurrent<span class=\"token operator\">&#061;<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u63a7\u5236\u5e76\u53d1\u6570\u91cf\u7684\u722c\u53d6&#034;&#034;&#034;<\/span><br \/>\n    semaphore <span class=\"token operator\">&#061;<\/span> Semaphore<span class=\"token punctuation\">(<\/span>max_concurrent<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">crawl_single<\/span><span class=\"token punctuation\">(<\/span>url<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> semaphore<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span>url<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token comment\"># \u521b\u5efa\u5e76\u53d1\u4efb\u52a1<\/span><br \/>\n    tasks <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span>crawl_single<span class=\"token punctuation\">(<\/span>url<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">for<\/span> url <span class=\"token keyword\">in<\/span> urls<span class=\"token punctuation\">]<\/span><br \/>\n    results <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> asyncio<span class=\"token punctuation\">.<\/span>gather<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>tasks<span class=\"token punctuation\">,<\/span> return_exceptions<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> results<\/p>\n<h4>2. \u7f13\u5b58\u7b56\u7565<\/h4>\n<p><span class=\"token keyword\">from<\/span> crawl4ai<span class=\"token punctuation\">.<\/span>cache_strategy <span class=\"token keyword\">import<\/span> CacheMode<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">cached_crawling<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span><br \/>\n        cache_strategy<span class=\"token operator\">&#061;<\/span>CacheMode<span class=\"token punctuation\">.<\/span>ENABLED<span class=\"token punctuation\">,<\/span>  <span class=\"token comment\"># \u542f\u7528\u7f13\u5b58<\/span><br \/>\n        verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u7b2c\u4e00\u6b21\u8bbf\u95ee\u4f1a\u7f13\u5b58\u7ed3\u679c<\/span><br \/>\n        result1 <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example.com&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u7b2c\u4e8c\u6b21\u8bbf\u95ee\u4f1a\u4f7f\u7528\u7f13\u5b58<\/span><br \/>\n        result2 <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example.com&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u7f13\u5b58\u547d\u4e2d: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>result2<span class=\"token punctuation\">.<\/span>from_cache<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<h4>3. \u9519\u8bef\u5904\u7406\u4e0e\u91cd\u8bd5<\/h4>\n<p><span class=\"token keyword\">import<\/span> asyncio<br \/>\n<span class=\"token keyword\">from<\/span> tenacity <span class=\"token keyword\">import<\/span> retry<span class=\"token punctuation\">,<\/span> stop_after_attempt<span class=\"token punctuation\">,<\/span> wait_exponential<\/p>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">RobustCrawler<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>crawler <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">None<\/span><\/p>\n<p>    <span class=\"token decorator annotation punctuation\">&#064;retry<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        stop<span class=\"token operator\">&#061;<\/span>stop_after_attempt<span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        wait<span class=\"token operator\">&#061;<\/span>wait_exponential<span class=\"token punctuation\">(<\/span>multiplier<span class=\"token operator\">&#061;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">min<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">max<\/span><span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">safe_crawl<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> url<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u5e26\u91cd\u8bd5\u673a\u5236\u7684\u5b89\u5168\u722c\u53d6&#034;&#034;&#034;<\/span><br \/>\n        <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span>verbose<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n                result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span>url<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token punctuation\">)<\/span><\/p>\n<p>                <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> result<span class=\"token punctuation\">.<\/span>success<span class=\"token punctuation\">:<\/span><br \/>\n                    <span class=\"token keyword\">raise<\/span> Exception<span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u722c\u53d6\u5931\u8d25: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>result<span class=\"token punctuation\">.<\/span>error_message<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>                <span class=\"token keyword\">return<\/span> result<br \/>\n        <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span><br \/>\n            <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;\u722c\u53d6\u51fa\u9519&#xff0c;\u51c6\u5907\u91cd\u8bd5: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token builtin\">str<\/span><span class=\"token punctuation\">(<\/span>e<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token keyword\">raise<\/span><\/p>\n<h3>\u4e0e\u5176\u4ed6\u6846\u67b6\u7684\u5bf9\u6bd4<\/h3>\n<h4>Crawl4AI vs \u4f20\u7edf\u722c\u866b\u6846\u67b6<\/h4>\n<table>\n<tr>\u7279\u6027Crawl4AIScrapyBeautifulSoup<\/tr>\n<tbody>\n<tr>\n<td>AI\u7406\u89e3\u80fd\u529b<\/td>\n<td>\u2705 \u5185\u7f6eLLM\u652f\u6301<\/td>\n<td>\u274c \u9700\u8981\u989d\u5916\u96c6\u6210<\/td>\n<td>\u274c \u65e0<\/td>\n<\/tr>\n<tr>\n<td>\u5b66\u4e60\u6210\u672c<\/td>\n<td>&#x1f7e1; \u4e2d\u7b49<\/td>\n<td>&#x1f534; \u8f83\u9ad8<\/td>\n<td>&#x1f7e2; \u8f83\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>\u6027\u80fd<\/td>\n<td>&#x1f7e2; \u9ad8&#xff08;\u5f02\u6b65&#xff09;<\/td>\n<td>&#x1f7e2; \u9ad8<\/td>\n<td>&#x1f7e1; \u4e2d\u7b49<\/td>\n<\/tr>\n<tr>\n<td>\u7ef4\u62a4\u6210\u672c<\/td>\n<td>&#x1f7e2; \u4f4e<\/td>\n<td>&#x1f534; \u9ad8<\/td>\n<td>&#x1f7e1; \u4e2d\u7b49<\/td>\n<\/tr>\n<tr>\n<td>\u7075\u6d3b\u6027<\/td>\n<td>&#x1f7e2; \u9ad8<\/td>\n<td>&#x1f7e2; \u9ad8<\/td>\n<td>&#x1f7e1; \u4e2d\u7b49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>\u9009\u62e9\u5efa\u8bae<\/h4>\n<li>\n<p>\u9009\u62e9Crawl4AI\u7684\u573a\u666f&#xff1a;<\/p>\n<ul>\n<li>\u9700\u8981\u7406\u89e3\u7f51\u9875\u5185\u5bb9\u8bed\u4e49<\/li>\n<li>\u7f51\u7ad9\u7ed3\u6784\u7ecf\u5e38\u53d8\u5316<\/li>\n<li>\u9700\u8981\u63d0\u53d6\u590d\u6742\u7684\u975e\u7ed3\u6784\u5316\u6570\u636e<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u9009\u62e9\u4f20\u7edf\u6846\u67b6\u7684\u573a\u666f&#xff1a;<\/p>\n<ul>\n<li>\u7f51\u7ad9\u7ed3\u6784\u7a33\u5b9a<\/li>\n<li>\u5bf9\u6027\u80fd\u8981\u6c42\u6781\u9ad8<\/li>\n<li>\u4e0d\u9700\u8981AI\u7406\u89e3\u80fd\u529b<\/li>\n<\/ul>\n<\/li>\n<h3>\u5e38\u89c1\u95ee\u9898\u4e0e\u89e3\u51b3\u65b9\u6848<\/h3>\n<h4>Q1: \u5982\u4f55\u5904\u7406\u9700\u8981\u767b\u5f55\u7684\u7f51\u7ad9&#xff1f;<\/h4>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">login_crawl<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span><br \/>\n        browser_type<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;chromium&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        headless<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">False<\/span>  <span class=\"token comment\"># \u53ef\u89c6\u5316\u8c03\u8bd5<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token comment\"># \u9996\u5148\u8bbf\u95ee\u767b\u5f55\u9875\u9762<\/span><br \/>\n        <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example.com\/login&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u6267\u884c\u767b\u5f55\u64cd\u4f5c<\/span><br \/>\n        <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span><br \/>\n            url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example.com\/login&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            js_code<span class=\"token operator\">&#061;<\/span><span class=\"token triple-quoted-string string\">&#034;&#034;&#034;<br \/>\n            document.querySelector(&#039;#username&#039;).value &#061; &#039;your_username&#039;;<br \/>\n            document.querySelector(&#039;#password&#039;).value &#061; &#039;your_password&#039;;<br \/>\n            document.querySelector(&#039;#login-btn&#039;).click();<br \/>\n            &#034;&#034;&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            wait_for<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;networkidle&#034;<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\"># \u8bbf\u95ee\u9700\u8981\u767b\u5f55\u7684\u9875\u9762<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example.com\/protected&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> result<\/p>\n<h4>Q2: \u5982\u4f55\u5904\u7406\u53cd\u722c\u866b\u673a\u5236&#xff1f;<\/h4>\n<p><span class=\"token keyword\">import<\/span> random<\/p>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">anti_detection_crawl<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token comment\"># \u968f\u673aUser-Agent<\/span><br \/>\n    user_agents <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n        <span class=\"token string\">&#034;Mozilla\/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit\/537.36&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit\/537.36&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Mozilla\/5.0 (X11; Linux x86_64) AppleWebKit\/537.36&#034;<\/span><br \/>\n    <span class=\"token punctuation\">]<\/span><\/p>\n<p>    headers <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token string\">&#034;User-Agent&#034;<\/span><span class=\"token punctuation\">:<\/span> random<span class=\"token punctuation\">.<\/span>choice<span class=\"token punctuation\">(<\/span>user_agents<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Accept&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;text\/html,application\/xhtml&#043;xml,application\/xml;q&#061;0.9,*\/*;q&#061;0.8&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Accept-Language&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;en-US,en;q&#061;0.5&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Accept-Encoding&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;gzip, deflate&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;DNT&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;1&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Connection&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;keep-alive&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token string\">&#034;Upgrade-Insecure-Requests&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;1&#034;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span><br \/>\n        headers<span class=\"token operator\">&#061;<\/span>headers<span class=\"token punctuation\">,<\/span><br \/>\n        delay_before_return_html<span class=\"token operator\">&#061;<\/span>random<span class=\"token punctuation\">.<\/span>uniform<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u968f\u673a\u5ef6\u8fdf<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n        result <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;https:\/\/example.com&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> result<\/p>\n<h4>Q3: \u5982\u4f55\u4f18\u5316\u5927\u89c4\u6a21\u722c\u53d6\u7684\u5185\u5b58\u4f7f\u7528&#xff1f;<\/h4>\n<p><span class=\"token keyword\">async<\/span> <span class=\"token keyword\">def<\/span> <span class=\"token function\">memory_efficient_crawl<\/span><span class=\"token punctuation\">(<\/span>urls<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u5185\u5b58\u9ad8\u6548\u7684\u5927\u89c4\u6a21\u722c\u53d6&#034;&#034;&#034;<\/span><br \/>\n    results <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p>    <span class=\"token comment\"># \u5206\u6279\u5904\u7406&#xff0c;\u907f\u514d\u5185\u5b58\u6ea2\u51fa<\/span><br \/>\n    batch_size <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> i <span class=\"token keyword\">in<\/span> <span class=\"token builtin\">range<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>urls<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> batch_size<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        batch_urls <span class=\"token operator\">&#061;<\/span> urls<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">:<\/span>i <span class=\"token operator\">&#043;<\/span> batch_size<span class=\"token punctuation\">]<\/span><\/p>\n<p>        <span class=\"token keyword\">async<\/span> <span class=\"token keyword\">with<\/span> AsyncWebCrawler<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> crawler<span class=\"token punctuation\">:<\/span><br \/>\n            batch_tasks <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n                crawler<span class=\"token punctuation\">.<\/span>arun<span class=\"token punctuation\">(<\/span>url<span class=\"token operator\">&#061;<\/span>url<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token keyword\">for<\/span> url <span class=\"token keyword\">in<\/span> batch_urls<br \/>\n            <span class=\"token punctuation\">]<\/span><br \/>\n            batch_results <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> asyncio<span class=\"token punctuation\">.<\/span>gather<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>batch_tasks<span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token comment\"># \u5904\u7406\u7ed3\u679c\u5e76\u6e05\u7406\u5185\u5b58<\/span><br \/>\n            <span class=\"token keyword\">for<\/span> result <span class=\"token keyword\">in<\/span> batch_results<span class=\"token punctuation\">:<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> result<span class=\"token punctuation\">.<\/span>success<span class=\"token punctuation\">:<\/span><br \/>\n                    <span class=\"token comment\"># \u53ea\u4fdd\u5b58\u9700\u8981\u7684\u6570\u636e<\/span><br \/>\n                    results<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token string\">&#039;url&#039;<\/span><span class=\"token punctuation\">:<\/span> result<span class=\"token punctuation\">.<\/span>url<span class=\"token punctuation\">,<\/span><br \/>\n                        <span class=\"token string\">&#039;title&#039;<\/span><span class=\"token punctuation\">:<\/span> extract_title<span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>html<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                        <span class=\"token string\">&#039;content_length&#039;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token builtin\">len<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">.<\/span>markdown<span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>            <span class=\"token comment\"># \u5f3a\u5236\u5783\u573e\u56de\u6536<\/span><br \/>\n            <span class=\"token keyword\">import<\/span> gc<br \/>\n            gc<span class=\"token punctuation\">.<\/span>collect<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> results<\/p>\n<h3>\u672a\u6765\u53d1\u5c55\u8d8b\u52bf<\/h3>\n<h4>1. \u591a\u6a21\u6001\u5185\u5bb9\u63d0\u53d6<\/h4>\n<p>\u672a\u6765\u7684Crawl4AI\u5c06\u652f\u6301\u66f4\u591a\u7c7b\u578b\u7684\u5185\u5bb9\u63d0\u53d6&#xff1a;<\/p>\n<ul>\n<li>\u56fe\u7247\u5185\u5bb9\u7406\u89e3&#xff08;OCR &#043; \u56fe\u50cf\u8bc6\u522b&#xff09;<\/li>\n<li>\u89c6\u9891\u5185\u5bb9\u5206\u6790<\/li>\n<li>\u97f3\u9891\u5185\u5bb9\u8f6c\u6587\u672c<\/li>\n<\/ul>\n<h4>2. \u66f4\u667a\u80fd\u7684\u53cd\u722c\u866b\u7ed5\u8fc7<\/h4>\n<ul>\n<li>\u57fa\u4e8eML\u7684\u884c\u4e3a\u6a21\u62df<\/li>\n<li>\u52a8\u6001\u6307\u7eb9\u4f2a\u9020<\/li>\n<li>\u667a\u80fd\u4ee3\u7406\u8f6e\u6362<\/li>\n<\/ul>\n<h4>3. 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