{"id":67758,"date":"2025-12-02T09:14:06","date_gmt":"2025-12-02T01:14:06","guid":{"rendered":"https:\/\/www.dataplugs.com\/how-to-create-your-own-web-crawler-using-javascript-node-js\/"},"modified":"2025-12-02T09:16:03","modified_gmt":"2025-12-02T01:16:03","slug":"how-to-create-your-own-web-crawler-using-javascript-node-js","status":"publish","type":"post","link":"https:\/\/www.dataplugs.com\/sc\/how-to-create-your-own-web-crawler-using-javascript-node-js\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 JavaScript\uff08Node.js\uff09\u521b\u5efa\u81ea\u5df1\u7684\u7f51\u9875\u722c\u866b"},"content":{"rendered":"<p>\u60f3\u7528 JavaScript \u548c Node.js \u5199\u4e00\u4e2a\u7f51\u9875\u722c\u866b\uff0c\u5176\u5b9e\u5e76\u4e0d\u662f\u4e00\u4ef6\u7b80\u5355\u7684\u4e8b\u3002\u73b0\u5728\u7684\u7f51\u7ad9\u8d8a\u6765\u8d8a\u591a\u7528 JavaScript \u6280\u672f\uff0c\u5185\u5bb9\u4e5f\u8d8a\u6765\u8d8a\u52a8\u6001\u3002\u5982\u679c\u4f60\u60f3\u81ea\u52a8\u5316\u6293\u53d6\u7f51\u7ad9\u6570\u636e\uff0cNode.js \u5c31\u662f\u5f88\u597d\u7684\u9009\u62e9\u3002\u672c\u6587\u4f1a\u8be6\u7ec6\u8bb2\u89e3\u5982\u4f55\u4ece\u96f6\u5f00\u59cb\u642d\u5efa Node.js \u7f51\u9875\u722c\u866b\uff0c\u5b9e\u7528\u6280\u672f\u9009\u578b\uff0c\u4ee5\u53ca\u57fa\u7840\u8bbe\u65bd\u8be5\u5982\u4f55\u914d\u5408\uff0c\u8ba9\u4f60\u7684\u722c\u866b\u9879\u76ee\u66f4\u7a33\u5b9a\u3001\u66f4\u9ad8\u6548\u3002<\/p>\n<h2><strong>Node.js \u7f51\u9875\u722c\u866b\u7684\u57fa\u7840\u539f\u7406<\/strong><\/h2>\n<p>\u7f51\u9875\u722c\u866b\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u81ea\u52a8\u5316\u811a\u672c\uff0c\u53ef\u4ee5\u7cfb\u7edf\u5730\u904d\u5386\u7f51\u7ad9\u3001\u8ddf\u8e2a\u94fe\u63a5\u3001\u6536\u96c6\u7f51\u9875\u5185\u5bb9\u3002\u548c\u5355\u7eaf\u7684\u6570\u636e\u6293\u53d6\uff08Web Scraping\uff09\u4e0d\u540c\uff0c\u722c\u866b\u662f\u9012\u5f52\u5730\u63a2\u7d22\u9875\u9762\u7ed3\u6784\u3001\u8bb0\u5f55\u7f51\u9875\u4e4b\u95f4\u7684\u5173\u8054\uff0c\u975e\u5e38\u9002\u5408\u505a\u641c\u7d22\u5f15\u64ce\u6536\u5f55\u3001\u7ade\u4e89\u5bf9\u624b\u5206\u6790\u3001\u6216\u8005\u6570\u636e\u96c6\u6784\u5efa\u3002<\/p>\n<p>Node.js \u7f51\u9875\u722c\u866b\u7684\u4e3b\u8981\u6d41\u7a0b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u8bbe\u5b9a\u8d77\u59cb\u79cd\u5b50\u7f51\u5740<\/li>\n<li>\u7528 HTTP \u8bf7\u6c42\u4e0b\u8f7d\u76ee\u6807\u9875\u9762<\/li>\n<li>\u89e3\u6790 HTML\uff0c\u63d0\u53d6\u76ee\u6807\u6570\u636e\u548c\u65b0\u94fe\u63a5<\/li>\n<li>\u7ba1\u7406\u5f85\u722c\u7f51\u5740\u961f\u5217\uff08\u9632\u6b62\u91cd\u590d\uff09<\/li>\n<li>\u63a7\u5236\u5e76\u53d1\u3001\u9650\u901f\uff0c\u4ee5\u53ca\u5f02\u5e38\u5904\u7406<\/li>\n<\/ul>\n<h2><strong>\u4e3a\u4ec0\u4e48\u9009 Node.js \u5f00\u53d1\u7f51\u9875\u722c\u866b\uff1f<\/strong><\/h2>\n<p>Node.js \u57fa\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u3001\u975e\u963b\u585e\u67b6\u6784\uff0c\u5929\u7136\u9002\u5408\u9ad8\u5e76\u53d1 HTTP \u8bf7\u6c42\u3002\u5bf9\u4e8e\u9700\u8981\u6293\u53d6\u5927\u91cf\u52a8\u6001\u5185\u5bb9\u7684\u7f51\u7ad9\uff0c\u8fd8\u80fd\u7ed3\u5408 Puppeteer\u3001Playwright \u8fd9\u7c7b\u65e0\u5934\u6d4f\u89c8\u5668\uff0c\u83b7\u53d6\u5b8c\u6574\u6e32\u67d3\u540e\u7684\u7f51\u9875\u6570\u636e\u3002<\/p>\n<p>\u5e38\u7528 Node.js \u722c\u866b\u5de5\u5177\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>Axios<\/strong>\uff1a\u5904\u7406 HTTP \u8bf7\u6c42\u975e\u5e38\u65b9\u4fbf<\/li>\n<li><strong>Cheerio<\/strong>\uff1a\u9ad8\u6548 HTML \u89e3\u6790\uff0c\u8bed\u6cd5\u548c jQuery \u7c7b\u4f3c<\/li>\n<li><strong>Puppeteer \/ Playwright<\/strong>\uff1a\u65e0\u5934\u6d4f\u89c8\u5668\u81ea\u52a8\u5316\uff0c\u9002\u5408\u52a8\u6001\u9875\u9762<\/li>\n<li><strong>node-crawler<\/strong>\uff1a\u5185\u7f6e\u4efb\u52a1\u961f\u5217\u3001\u91cd\u8bd5\u548c\u9650\u901f\u7b49\u529f\u80fd<\/li>\n<\/ul>\n<h2><strong>\u5f00\u53d1\u73af\u5883\u51c6\u5907\u4e0e\u5b89\u88c5<\/strong><\/h2>\n<p>\u8bf7\u5148\u786e\u4fdd\u4f60\u7684\u7535\u8111\u5df2\u88c5\u597d Node.js \u548c npm\u3002\u521d\u59cb\u5316\u9879\u76ee\u5e76\u5b89\u88c5\u4f9d\u8d56\uff1a<\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #ff9900;\">npm<\/span> init -y<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #ff9900;\">npm<\/span> install axios cheerio<\/span><\/p>\n<p>\u5982\u679c\u8981\u5904\u7406\u52a8\u6001\u7f51\u7ad9\u5185\u5bb9\uff1a<\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">npm <span style=\"color: #cc99ff;\">install<\/span> puppeteer<\/span><\/p>\n<p>\u8fd9\u6837\u65e2\u80fd\u5e94\u5bf9\u9759\u6001\u9875\u9762\uff0c\u4e5f\u80fd\u6293\u52a8\u6001\u6e32\u67d3\u5185\u5bb9\u3002<\/p>\n<h2><strong>\u6253\u9020\u7a33\u5065\u722c\u866b\u7684\u8bbe\u8ba1\u8981\u70b9<\/strong><\/h2>\n<p>\u4e00\u4e2a\u5b9e\u7528\u3001\u6613\u7ef4\u62a4\u7684 Node.js \u722c\u866b\uff0c\u5fc5\u987b\u89e3\u51b3\u597d\u8fd9\u4e9b\u95ee\u9898\uff1a<\/p>\n<ul>\n<li><strong>\u53bb\u91cd<\/strong>\uff1a\u7528 Set \u6216\u6570\u636e\u5e93\u8bb0\u5f55\u5df2\u8bbf\u95ee\u7f51\u5740<\/li>\n<li><strong>\u9650\u901f<\/strong>\uff1a\u5408\u7406\u63a7\u5236\u8bf7\u6c42\u9891\u7387\uff0c\u907f\u514d\u88ab\u76ee\u6807\u7f51\u7ad9\u5c01\u7981<\/li>\n<li><strong>\u9519\u8bef\u5904\u7406<\/strong>\uff1a\u7528 try-catch \u6355\u6349\u5f02\u5e38\uff0c\u51fa\u9519\u80fd\u81ea\u52a8\u91cd\u8bd5<\/li>\n<li><strong>\u53ef\u6269\u5c55\u6027<\/strong>\uff1a\u7528 async\/await \u5199\u5e76\u53d1\u4ee3\u7801\uff0c\u8d44\u6e90\u76d1\u63a7\u4e0d\u80fd\u5c11<\/li>\n<li><strong>\u5408\u89c4\u4e0e\u9053\u5fb7<\/strong>\uff1a\u4e00\u5b9a\u8981\u9075\u5b88 robots.txt \u548c\u76f8\u5173\u6cd5\u89c4<\/li>\n<\/ul>\n<h2><strong>Node.js \u7f51\u9875\u722c\u866b\u793a\u4f8b\u4ee3\u7801<\/strong><\/h2>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u7528 Axios \u548c Cheerio \u5b9e\u73b0\u7684\u57fa\u7840\u722c\u866b\uff1a<\/p>\n<p>javascript<\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> axios = <span style=\"color: #ff9900;\">require<\/span>(&#8216;<span style=\"color: #00ff00;\">axios<\/span>&#8216;);<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> cheerio = <span style=\"color: #ff9900;\">require<\/span>(&#8216;<span style=\"color: #00ff00;\">cheerio<\/span>&#8216;);<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> baseUrl = &#8216;<span style=\"color: #00ff00;\">https:\/\/example.com<\/span>&#8216;;<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> queue = [baseUrl];<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> visited = <span style=\"color: #cc99ff;\">new<\/span> <span style=\"color: #ff9900;\">Set<\/span>();<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">async function<\/span> <span style=\"color: #00ffff;\">crawl<\/span>() {<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">while<\/span> (queue.length &gt; <span style=\"color: #ff9900;\">0<\/span>) {<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> url = queue.shift();<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">if<\/span> (visited.has(url)) <span style=\"color: #cc99ff;\">continue<\/span>;<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">try<\/span> {<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> response =<span style=\"color: #cc99ff;\"> await<\/span> axios.get(url, { headers: { &#8216;<span style=\"color: #00ff00;\">User-Agent&#8217;: &#8216;CustomCrawler\/1.0<\/span>&#8216; } });<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> $ = cheerio.load(response.data);<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffff99;\">\/\/ Extract data or links as needed<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">$(&#8216;<span style=\"color: #00ff00;\">a<\/span>&#8216;).each((<span style=\"color: #ff9900;\">_, elem<\/span>) =&gt; {<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\"><span style=\"color: #cc99ff;\">const<\/span> href = $(elem).attr(&#8216;<span style=\"color: #00ff00;\">href<\/span>&#8216;);<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffff99;\">\/\/ Normalize, filter, and add to queue as appropriate<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">});<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">visited.add(url);<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffff99;\">\/\/ Optionally add delay or concurrency control here<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">} <span style=\"color: #cc99ff;\">catch<\/span> (err) {<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffff99;\">\/\/ Handle errors, log or retry as needed<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">}<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">}<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">}<\/span><\/p>\n<p><span style=\"background-color: #000000; color: #ffffff;\">crawl();<\/span><\/p>\n<p>\u5982\u679c\u9047\u5230\u52a8\u6001\u7f51\u7ad9\uff0c\u7528 Puppeteer \u5148\u6e32\u67d3\u518d\u6293\u6570\u636e\u3002<\/p>\n<h2><strong>\u57fa\u7840\u8bbe\u65bd\u9009\u578b\u5bf9\u722c\u866b\u9879\u76ee\u7684\u5f71\u54cd<\/strong><\/h2>\n<p>\u5f53\u722c\u866b\u89c4\u6a21\u53d8\u5927\uff0c\u57fa\u7840\u8bbe\u65bd\u7684\u7a33\u5b9a\u6027\u3001\u5e26\u5bbd\u548c\u5b89\u5168\u76f4\u63a5\u5f71\u54cd\u9879\u76ee\u6210\u8d25\u3002\u666e\u901a\u4e91\u4e3b\u673a\u6216\u5171\u4eab\u4e3b\u673a\u5f88\u5bb9\u6613\u6709\u6027\u80fd\u74f6\u9888\u6216\u5b89\u5168\u9690\u60a3\u3002<\/p>\n<p><a href=\"https:\/\/www.dataplugs.com\/sc\/product\/dedicated-server-%e6%9c%8d%e5%8a%a1%e5%99%a8\/\">\u72ec\u7acb\u670d\u52a1\u5668<\/a>\uff08\u5982 Dataplugs\uff09\u4e13\u4e3a\u8fd9\u4e9b\u95ee\u9898\u8bbe\u8ba1\uff0c\u80fd\u63d0\u4f9b\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u5e26\u5bbd\u3001\u8d44\u6e90\u72ec\u4eab<\/strong>\uff1a\u9002\u5408\u5927\u89c4\u6a21\u5e76\u53d1\u6570\u636e\u91c7\u96c6<\/li>\n<li><strong>\u5168\u7403\u4f4e\u5ef6\u8fdf\u7f51\u7edc<\/strong>\uff1a\u4e9a\u6d32\u3001\u5317\u7f8e\u7b49\u5e02\u573a\u76f4\u8fde<\/li>\n<li><strong>\u9ad8\u7ea7\u5b89\u5168<\/strong>\uff1a\u5185\u7f6e\u9632\u706b\u5899\u3001\u9632 DDoS\u3001\u786c\u4ef6\u9694\u79bb<\/li>\n<li><strong>\u5f39\u6027\u6269\u5c55<\/strong>\uff1a\u6309\u9700\u968f\u65f6\u5347\u7ea7\u3001\u7075\u6d3b\u5206\u914d<\/li>\n<li><strong>\u5408\u89c4\u652f\u6301<\/strong>\uff1a\u591a\u5730\u6570\u636e\u4e2d\u5fc3\uff0c\u65b9\u4fbf\u672c\u5730\u5408\u89c4<\/li>\n<\/ul>\n<p>\u7528\u72ec\u7acb\u670d\u52a1\u5668\u90e8\u7f72 Node.js \u722c\u866b\uff0c\u53ef\u5927\u5927\u51cf\u5c11\u8d44\u6e90\u4e89\u62a2\u3001\u7a81\u53d1\u5b95\u673a\u98ce\u9669\uff0c\u4fdd\u8bc1\u9ad8\u6027\u80fd\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n<h2><strong>\u5b9e\u6218\u5efa\u8bae\u4e0e\u672a\u6765\u90e8\u7f72<\/strong><\/h2>\n<p>\u7f51\u7ad9\u7ed3\u6784\u968f\u65f6\u53ef\u80fd\u53d8\uff0c\u60f3\u8ba9\u722c\u866b\u957f\u671f\u7a33\u5b9a\u8fd0\u884c\uff0c\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u5b9a\u671f\u68c0\u67e5\u76ee\u6807\u7ad9\u7ed3\u6784\uff0c\u53ca\u65f6\u66f4\u65b0\u9009\u62e9\u5668<\/li>\n<li>\u9488\u5bf9\u9650\u901f\u6216\u5730\u533a\u9650\u5236\u7f51\u7ad9\uff0c\u5efa\u8bae\u7528\u4ee3\u7406\u548c IP \u8f6e\u6362<\/li>\n<li>\u5b8c\u5584\u65e5\u5fd7\u548c\u76d1\u63a7\uff0c\u5b9e\u65f6\u8ffd\u8e2a\u722c\u866b\u6027\u80fd\u548c\u6570\u636e\u8d28\u91cf<\/li>\n<li>\u7a0b\u5e8f\u7ed3\u6784\u6a21\u5757\u5316\uff0c\u65b9\u4fbf\u540e\u671f\u6269\u5c55\u548c\u7ef4\u62a4<\/li>\n<\/ul>\n<h2><strong>\u603b\u7ed3<\/strong><\/h2>\n<p>\u7528 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