{"id":21107,"date":"2025-04-19T04:12:08","date_gmt":"2025-04-18T20:12:08","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/21107.html"},"modified":"2025-04-19T04:12:08","modified_gmt":"2025-04-18T20:12:08","slug":"%e3%80%90c%e9%ab%98%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8webserver%e3%80%91-17%ef%bc%9a%e9%98%bb%e5%a1%9e-%e9%9d%9e%e9%98%bb%e5%a1%9e%e5%92%8c%e5%90%8c%e6%ad%a5-%e5%bc%82%e6%ad%a5%e3%80%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/21107.html","title":{"rendered":"\u3010C++\u9ad8\u5e76\u53d1\u670d\u52a1\u5668WebServer\u3011-17\uff1a\u963b\u585e\/\u975e\u963b\u585e\u548c\u540c\u6b65\/\u5f02\u6b65\u3001\u4e94\u79cdIO\u6a21\u578b\u3001Web\u670d\u52a1\u5668"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201203-6802b213e9d98.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<\/p>\n<h4>\u672c\u6587\u76ee\u5f55<\/h4>\n<ul>\n<li>\u4e00\u3001\u963b\u585e\/\u975e\u963b\u585e\u3001\u540c\u6b65\/\u5f02\u6b65<\/li>\n<li>\n<ul>\n<li>1.1 \u8fa8\u6790<\/li>\n<li>1.2 \u5f02\u6b65io\u63a5\u53e3<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001\u4e94\u79cdIO\u6a21\u578b<\/li>\n<li>\n<ul>\n<li>2.1 \u963b\u585e blocking \u6a21\u578b<\/li>\n<li>2.2 \u975e\u963b\u585e NIO \u6a21\u578b<\/li>\n<li>2.3 IO\u591a\u8def\u590d\u7528<\/li>\n<li>2.4 \u4fe1\u53f7\u9a71\u52a8Signal-driven<\/li>\n<li>2.5 \u5f02\u6b65<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001Web Sever \u7f51\u9875\u670d\u52a1\u5668<\/li>\n<li>\n<ul>\n<li>3.1 HTTP\u7684\u8bf7\u6c42\u54cd\u5e94\u6b65\u9aa4<\/li>\n<li>3.2 HTTP\u8bf7\u6c42\u4e0e\u54cd\u5e94\u62a5\u6587\u683c\u5f0f<\/li>\n<li>3.3 HTTP\u8bf7\u6c42\u65b9\u6cd5<\/li>\n<li>3.4 HTTP\u72b6\u6001\u7801<\/li>\n<li>3.4 \u670d\u52a1\u5668\u7f16\u7a0b\u57fa\u672c\u6846\u67b6<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u4e00\u3001\u963b\u585e\/\u975e\u963b\u585e\u3001\u540c\u6b65\/\u5f02\u6b65<\/h2>\n<h3>1.1 \u8fa8\u6790<\/h3>\n<p>\u672c\u8282\u7684\u963b\u585e\u4e0e\u975e\u963b\u585e\u3001\u540c\u6b65\u4e0e\u5f02\u6b65\u5747\u6307\u7f51\u7edcI\/O\u3002<\/p>\n<p>\u9996\u5148\u6211\u4eec\u660e\u786e&#xff0c;\u5178\u578b\u7684\u4e00\u6b21IO\u7684\u4e24\u4e2a\u9636\u6bb5\u662f \u6570\u636e\u5c31\u7eea \u548c \u6570\u636e\u8bfb\u5199\u3002<\/p>\n<p>\u6570\u636e\u5c31\u7eea\u662f\u6307\u6839\u636e\u7cfb\u7edfIO\u64cd\u4f5c\u7684\u5c31\u7eea\u72b6\u6001&#xff0c;\u4ece\u800c\u6709\u963b\u585e\u548c\u975e\u963b\u585e\u7684\u8bf4\u6cd5\u3002 \u6570\u636e\u8bfb\u5199\u662f\u6307\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u548c\u5185\u6838\u7684\u4ea4\u4e92\u65b9\u5f0f&#xff0c;\u4ece\u800c\u6709\u540c\u6b65\u548c\u5f02\u6b65\u7684\u8bf4\u6cd5\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4ee5\u4e0b\u9762\u8fd9\u4e2a\u56fe\u8fdb\u884c\u5bf9\u5e94\u7684\u8bf4\u660e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201204-6802b21441665.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u963b\u585e&#xff1a;\u5f53\u8c03\u7528IO\u7684\u51fd\u6570&#xff0c;\u5f53\u6570\u636e\u8fd8\u6ca1\u6709\u51c6\u5907\u597d&#xff08;\u5bf9\u65b9\u53ef\u80fd\u8fd8\u6ca1\u6709\u53d1\u9001\u8fc7\u6765&#xff09;&#xff0c;\u90a3\u4e48\u5c31\u4f1a\u5904\u4e8e\u963b\u585e&#xff0c;\u8fd9\u4e2a\u65f6\u5019\u7ebf\u7a0b\u4f1a\u5904\u4e8e\u4e00\u4e2a\u6302\u8d77\u7684\u72b6\u6001\u3002\u7ebf\u7a0b\u6302\u8d77\u5c31\u4e0d\u4f1a\u518d\u5360\u7528cpu\u7684\u8d44\u6e90\u4e86\u3002<\/p>\n<p>\u975e\u963b\u585e&#xff1a;\u5f53\u8c03\u7528IO\u7684\u51fd\u6570&#xff0c;\u5f53\u6570\u636e\u8fd8\u6ca1\u6709\u51c6\u5907\u597d&#xff08;\u5bf9\u65b9\u53ef\u80fd\u8fd8\u6ca1\u6709\u53d1\u9001\u8fc7\u6765&#xff09;&#xff0c;\u7a0b\u5e8f\u5e76\u4e0d\u4f1a\u6302\u8d77&#xff0c;\u800c\u662f\u4f1a\u7acb\u5373\u8fd4\u56de&#xff0c;\u5e76\u4e14\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c&#xff0c;\u8fd9\u4e2a\u65f6\u5019\u9700\u8981\u901a\u8fc7\u8fd4\u56de\u503c\u8fdb\u884c\u4e00\u4e2a\u5224\u65ad&#xff08;\u5224\u65ad\u6570\u636e\u662f\u5426\u53d1\u8fc7\u6765\u4e86&#xff09;\u3002<\/p>\n<p>\u6bd4\u5982\u4e4b\u524d\u63a5\u89e6\u8fc7\u7684ssize_t recv(int sockfd,void * buf,size_t len,int flags)\u8fd9\u4e2a\u51fd\u6570&#xff08;\u9ed8\u8ba4\u662f\u963b\u585e\u7684\u5c5e\u6027&#xff09;\u3002<\/p>\n<p>sockfd\u5c31\u5bf9\u5e94\u4e86\u64cd\u4f5c\u7cfb\u7edf\u5728\u5185\u6838\u7684\u63a5\u6536\u7f13\u51b2\u533a&#xff0c;\u5047\u8bberecv\u8bbe\u7f6e\u4e86\u963b\u585e\u5c5e\u6027&#xff0c;\u90a3\u4e48\u5982\u679c\u5bf9\u65b9\u5df2\u7ecf\u628a\u6570\u636e\u53d1\u8fc7\u6765&#xff0c;\u5c31\u4e0d\u4f1a\u5904\u4e8e\u963b\u585e&#xff0c;\u4f46\u662f\u5982\u679c\u6570\u636e\u6ca1\u6709\u5230\u8fbe&#xff0c;\u5c31\u4f1a\u628a\u7ebf\u7a0b\u6302\u8d77\u3002<\/p>\n<p>\u5047\u8bbe\u5982\u679crecv\u51fd\u6570\u8bbe\u7f6e\u4e86\u975e\u963b\u585e\u7684\u5c5e\u6027&#xff0c;\u5f53\u6ca1\u6709\u6570\u636e\u5230\u8fbe&#xff0c;\u90a3\u4e48\u51fd\u6570\u4f1a\u7acb\u5373\u8fd4\u56de\u4e00\u4e2a\u6570\u503c&#xff0c;\u6211\u4eec\u9700\u8981\u5224\u65ad\u8fd9\u4e2a\u6570\u503c&#xff0c;\u5224\u65ad\u4e00\u4e9b\u60c5\u51b5\u3002\u5224\u65ad\u7684\u60c5\u51b5\u73b0\u5728\u8fdb\u884c\u5bf9\u5e94\u7684\u8bf4\u660e&#xff08;\u4f8b\u5982\u5f53\u8fd4\u56de-1\u65f6&#xff0c;\u9700\u8981\u5bf9EINTR\u3001EAGAIN\u3001EWOULDBLOCK\u7b49\u8fdb\u884c\u7279\u5224&#xff0c;\u8fd9\u51e0\u4e2a\u60c5\u51b5\u5e76\u4e0d\u662f\u9519\u8bef&#xff09;\u3002<\/p>\n<p>int size &#061; recv(sockfd,buf,1024,0) &#xff0c;\u5982\u679c\u8fd4\u56desize&#061;-1&#xff0c;\u5c31\u4ee3\u8868\u51fa\u9519\u4e86&#xff0c;\u4f46\u662f\u4f1a\u8bbe\u7f6e\u5bf9\u5e94\u7684\u9519\u8bef\u7684errno\u3002<\/p>\n<p>\u4f46\u662f\u5f53\u662f\u67d0\u4e9b\u60c5\u51b5\u7684\u65f6\u5019&#xff0c;\u9700\u8981\u6211\u4eec\u8fdb\u884c\u7279\u6b8a\u5904\u7406\u3002\u6bd4\u5982EINTR&#xff0c;\u5f53\u4fe1\u53f7\u4ea7\u751f\u540e\u4f1a\u4e2d\u65ad\u7a0b\u5e8f&#xff0c;\u4e2d\u65ad\u540e\u518d\u56de\u6765\u4e4b\u540e\u4f1a\u8fd4\u56de-1&#xff0c;\u5e76\u4e14\u6807\u8bb0\u9519\u8bef\u4e3aEINTR&#xff09;\u3002\u8fd8\u6bd4\u5982EAGAIN \/ EWOULDBLOCK&#xff0c;\u8868\u793a\u6ca1\u6709\u5f97\u5230\u6570\u636e&#xff0c;\u9700\u8981\u518d\u8bfb\u4e00\u6b21\u3002<\/p>\n<p>\u5982\u679c\u8fd4\u56desize&#061;0&#xff0c;\u4ee3\u8868\u8bfb\u53d6\u5230\u6570\u636e\u7684\u672b\u5c3e&#xff0c;\u5bf9\u65b9\u8fde\u63a5\u5173\u95ed\u3002<\/p>\n<p>\u5982\u679c\u8fd4\u56desize&gt;0&#xff0c;\u4ee3\u8868\u8bfb\u53d6\u5230\u4e86\u591a\u5c11\u7684\u6570\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201204-6802b2148c951.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u63a5\u4e0b\u6765\u6765\u8bb2\u8bb2\u540c\u6b65\u5f02\u6b65\u3002<\/p>\n<p>recv\u662f\u4e00\u4e2a\u201c\u540c\u6b65\u201d\u51fd\u6570&#xff0c;\u56e0\u4e3a\u662f\u9700\u8981\u6211\u4eec\u81ea\u5df1\u53bb\u8c03\u7528\u548c\u8bfb\u53d6\u5230buf\u4e2d&#xff08;\u4e2a\u4eba\u89c1\u89e3&#xff09;&#xff0c;\u9700\u8981\u7b49sockfd\u4e2d\u6570\u636e\u590d\u5236\u5230buf\u4e2d\u540e\u624d\u4f1a\u8fd4\u56de&#xff0c;\u5e76\u4e14\u5728\u6ca1\u6709\u5b8c\u6210\u4e4b\u524d&#xff0c;\u5e76\u4e0d\u4f1a\u8fd4\u56de&#xff0c;\u6b64\u65f6\u7a0b\u5e8f\u5e76\u4e0d\u4f1a\u5f80\u4e0b\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n<p>\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u9700\u8981\u6211\u4eec\u5e94\u7528\u5c42\u81ea\u5df1\u53bb\u8c03\u7528\u8fd9\u4e2arecv\u5b8c\u6210\u76f8\u5173\u7684\u8bfb\u5199\u3002<\/p>\n<p>\u5f02\u6b65\u4e00\u822c\u9700\u8981\u64cd\u4f5c\u7cfb\u7edf\u7ed9\u6211\u4eec\u63d0\u4f9b\u5f02\u6b65IO\u63a5\u53e3&#xff0c;\u4e00\u822c\u9700\u8981\u628asockfd\u3001buf\u3001\u901a\u77e5\u65b9\u5f0f\u7ed9\u64cd\u4f5c\u7cfb\u7edf&#xff0c;\u63a5\u4e0b\u6765\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u7ee7\u7eed\u5f80\u4e0b\u6267\u884c\u5176\u4ed6\u64cd\u4f5c&#xff0c;\u5f53\u5185\u73af\u7f13\u51b2\u533a\u6709\u6570\u636e\u4e4b\u540e&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5e2e\u6211\u4eec\u628a\u8fd9\u4e2a\u6570\u636e\u653e\u5230buf\u5f53\u4e2d&#xff0c;\u7136\u540e\u518d\u901a\u77e5\u6211\u4eec&#xff08;\u901a\u8fc7sigio\u4fe1\u53f7&#xff0c;\u544a\u77e5\u6211\u4eecbuf\u7684\u6570\u636e\u5df2\u7ecf\u51c6\u5907\u597d\u4e86&#xff09;\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u5728\u540c\u6b65I\/O\u64cd\u4f5c\u4e2d&#xff0c;\u5e94\u7528\u7a0b\u5e8f\u8d1f\u8d23\u4e3b\u52a8\u8c03\u7528I\/O\u51fd\u6570\u6765\u8bf7\u6c42\u6570\u636e\u4f20\u8f93\u3002\u4ee5recv\u51fd\u6570\u4e3a\u4f8b&#xff0c;\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528recv\u540e&#xff0c;\u5982\u679c\u6570\u636e\u5c1a\u672a\u51c6\u5907\u597d&#xff0c;recv\u4f1a\u963b\u585e\u5f53\u524d\u7ebf\u7a0b&#xff0c;\u76f4\u5230\u6570\u636e\u4ece\u5957\u63a5\u5b57\u7f13\u51b2\u533a\u590d\u5236\u5230\u7528\u6237\u63d0\u4f9b\u7684\u7f13\u51b2\u533a\u4e2d\u3002\u8fd9\u79cd\u963b\u585e\u884c\u4e3a\u610f\u5473\u7740\u5e94\u7528\u7a0b\u5e8f\u5728\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6210\u671f\u95f4\u4e0d\u80fd\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u3002\u540c\u6b65I\/O\u901a\u5e38\u9002\u7528\u4e8e\u6570\u636e\u4f20\u8f93\u91cf\u4e0d\u5927\u3001\u5b9e\u65f6\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u666f\u3002<\/p>\n<p>\u4e0e\u540c\u6b65I\/O\u4e0d\u540c&#xff0c;\u5f02\u6b65I\/O\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u5728\u53d1\u8d77I\/O\u8bf7\u6c42\u540e\u7acb\u5373\u8fd4\u56de&#xff0c;\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1&#xff0c;\u800c\u4e0d\u5fc5\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6210\u3002\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5728\u6570\u636e\u51c6\u5907\u597d\u540e&#xff0c;\u901a\u8fc7\u67d0\u79cd\u673a\u5236&#xff08;\u5982\u4fe1\u53f7\u3001\u56de\u8c03\u51fd\u6570\u6216\u4e8b\u4ef6\u901a\u77e5&#xff09;\u544a\u77e5\u5e94\u7528\u7a0b\u5e8f\u3002\u8fd9\u79cd\u673a\u5236\u4f7f\u5f97\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u5728\u6570\u636e\u5230\u8fbe\u65f6\u5f97\u5230\u901a\u77e5&#xff0c;\u800c\u4e0d\u5fc5\u4e0d\u65ad\u8f6e\u8be2\u68c0\u67e5\u3002<\/p>\n<p>\u5f02\u6b65I\/O\u901a\u5e38\u9700\u8981\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u4e13\u95e8\u7684\u5f02\u6b65I\/O\u63a5\u53e3&#xff0c;\u5982aio_read\u3001aio_write\u7b49\u3002\u8fd9\u4e9b\u63a5\u53e3\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u6307\u5b9aI\/O\u64cd\u4f5c\u7684\u53c2\u6570&#xff0c;\u5305\u62ec\u7f13\u51b2\u533a\u5730\u5740\u3001\u6570\u636e\u957f\u5ea6\u7b49&#xff0c;\u5e76\u5c06\u63a7\u5236\u6743\u8fd4\u56de\u7ed9\u5e94\u7528\u7a0b\u5e8f\u3002\u5f53I\/O\u64cd\u4f5c\u5b8c\u6210\u65f6&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u901a\u8fc7\u6ce8\u518c\u7684\u56de\u8c03\u51fd\u6570\u6216\u4fe1\u53f7\u5904\u7406\u7a0b\u5e8f\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u5f02\u6b65I\/O\u901a\u5e38\u80fd\u66f4\u597d\u5730\u5229\u7528\u7cfb\u7edf\u8d44\u6e90&#xff0c;\u56e0\u4e3a\u5b83\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u5728\u7b49\u5f85I\/O\u64cd\u4f5c\u5b8c\u6210\u65f6\u6267\u884c\u5176\u4ed6\u4efb\u52a1&#xff0c;\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5e76\u53d1\u6027\u548c\u54cd\u5e94\u6027\u3002\u4f46\u5f02\u6b65I\/O\u7684\u7f16\u7a0b\u6a21\u578b\u901a\u5e38\u6bd4\u540c\u6b65I\/O\u66f4\u590d\u6742&#xff0c;\u56e0\u4e3a\u5b83\u9700\u8981\u5904\u7406\u56de\u8c03\u51fd\u6570\u3001\u4fe1\u53f7\u5904\u7406\u7b49\u673a\u5236&#xff0c;\u8fd9\u53ef\u80fd\u4f1a\u589e\u52a0\u4ee3\u7801\u7684\u590d\u6742\u6027\u548c\u8c03\u8bd5\u96be\u5ea6\u3002<\/p>\n<p>\u540c\u6b65I\/O&#xff1a;\u9002\u7528\u4e8eI\/O\u64cd\u4f5c\u4e0d\u9891\u7e41\u3001\u6570\u636e\u91cf\u4e0d\u5927\u3001\u5b9e\u65f6\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u666f\u3002\u4f8b\u5982&#xff0c;\u7b80\u5355\u7684\u6587\u4ef6\u8bfb\u5199\u3001\u5c11\u91cf\u7684\u6570\u636e\u4f20\u8f93\u7b49\u3002<\/p>\n<p>\u5f02\u6b65I\/O&#xff1a;\u9002\u7528\u4e8e\u9700\u8981\u5904\u7406\u5927\u91cf\u5e76\u53d1\u8fde\u63a5\u3001\u6570\u636e\u91cf\u5927\u3001\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u7684\u573a\u666f\u3002\u4f8b\u5982&#xff0c;\u9ad8\u6027\u80fd\u7684\u7f51\u7edc\u670d\u52a1\u5668\u3001\u5b9e\u65f6\u6570\u636e\u5904\u7406\u7cfb\u7edf\u7b49\u3002<\/p>\n<p>\u9648\u7855\u5927\u795e\u8bf4\u8fc7\u4e00\u53e5\u8bdd&#xff1a;\u5904\u7406IO\u7684\u65f6\u5019&#xff0c;\u963b\u585e\u548c\u975e\u963b\u585e\u90fd\u662f\u540c\u6b65IO&#xff08;\u90fd\u9700\u8981\u6211\u4eec\u7528\u6237\u81ea\u5df1\u53bb\u64cd\u4f5c\u6570\u636e&#xff09;&#xff0c;\u53ea\u6709\u4f7f\u7528\u4e86\u7279\u6b8a\u7684API\u624d\u662f\u5f02\u6b65IO\u3002&#xff08;\u6bd4\u5982linux\u4e2d\u7684aio_read\u63a5\u53e3&#xff09;<\/p>\n<p>epoll\u5e76\u4e0d\u662f\u5f02\u6b65\u7684&#xff0c;\u8fd9\u4e2a\u9700\u8981\u5f04\u6e05\u695a\u3002\u660e\u786e\u8fd9\u4e2a\u6570\u636e\u662f\u4e0d\u662f\u6211\u4eec\u5e94\u7528\u7a0b\u5e8f\u53bb\u4e3b\u52a8\u64cd\u4f5c\u5c31\u884c&#xff0c;\u5982\u679c\u662f&#xff0c;\u90a3\u5c31\u662f\u540c\u6b65&#xff0c;\u5982\u679c\u662f\u64cd\u4f5c\u7cfb\u7edf\u5e2e\u6211\u4eec\u76f4\u63a5\u642c\u8fd0\u597d\u5230buf\u4e2d&#xff0c;\u90a3\u5c31\u662f\u5f02\u6b65\u3002&#xff08;IO\u591a\u8def\u590d\u7528\u90fd\u662f\u540c\u6b65\u7684\u3002&#xff09;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201204-6802b214d4de5.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u4e00\u4e2a\u5178\u578b\u7684\u7f51\u7edcIO\u63a5\u53e3\u8c03\u7528&#xff0c;\u5206\u4e3a\u4e24\u4e2a\u9636\u6bb5&#xff0c;\u5206\u522b\u662f\u201c\u6570\u636e\u5c31\u7eea\u201d \u548c \u201c\u6570\u636e\u8bfb\u5199\u201d&#xff0c;\u6570\u636e\u5c31\u7eea\u9636\u6bb5\u5206\u4e3a\u963b\u585e\u548c\u975e\u963b\u585e&#xff0c;\u8868\u73b0\u5f97\u7ed3\u679c\u5c31\u662f&#xff0c;\u963b\u585e\u5f53\u524d\u7ebf\u7a0b\u6216\u662f\u76f4\u63a5\u8fd4\u56de\u3002<\/p>\n<p>\u540c\u6b65\u8868\u793aA\u5411B\u8bf7\u6c42\u8c03\u7528\u4e00\u4e2a\u7f51\u7edcIO\u63a5\u53e3\u65f6&#xff08;\u6216\u8005\u8c03\u7528\u67d0\u4e2a\u4e1a\u52a1\u903b\u8f91API\u63a5\u53e3\u65f6&#xff09;&#xff0c;\u6570\u636e\u7684\u8bfb\u5199\u90fd\u662f\u7531\u8bf7\u6c42\u65b9A\u81ea\u5df1\u6765\u5b8c\u6210\u7684&#xff08;\u4e0d\u7ba1\u662f\u963b\u585e\u8fd8\u662f\u975e\u963b\u585e&#xff09;&#xff1b;\u5f02\u6b65\u8868\u793aA\u5411B\u8bf7\u6c42\u8c03\u7528\u4e00\u4e2a\u7f51\u7edcIO\u63a5\u53e3\u65f6&#xff08;\u6216\u8005\u8c03\u7528\u67d0\u4e2a\u4e1a\u52a1\u903b\u8f91API\u63a5\u53e3\u65f6&#xff09;&#xff0c;\u5411B\u4f20\u5165\u8bf7\u6c42\u7684\u4e8b\u4ef6\u4ee5\u53ca\u4e8b\u4ef6\u53d1\u751f\u65f6\u901a\u77e5\u7684\u65b9\u5f0f&#xff0c;A\u5c31\u53ef\u4ee5\u5904\u7406\u5176\u5b83\u903b\u8f91\u4e86&#xff0c;\u5f53B\u76d1\u542c\u5230\u4e8b\u4ef6\u5904\u7406\u5b8c\u6210\u540e&#xff0c;\u4f1a\u7528\u4e8b\u5148\u7ea6\u5b9a\u597d\u7684\u901a\u77e5\u65b9\u5f0f&#xff0c;\u901a\u77e5A\u5904\u7406\u7ed3\u679c\u3002<\/p>\n<h3>1.2 \u5f02\u6b65io\u63a5\u53e3<\/h3>\n<p>man aio_read\u6765\u67e5\u770blinux\u7cfb\u7edf\u6587\u6863\u4e2d\u7684\u5f02\u6b65io\u8bf4\u660e\u3002<\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u5176\u51fd\u6570\u7684\u53c2\u6570\u662f\u4e00\u4e2a\u7c7b\u578b\u4e3aaiocb *aiocbp\u7684\u4e00\u4e2a\u7ed3\u6784\u4f53\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201205-6802b21507dd8.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>\u7ed3\u6784\u4f53\u5b9a\u4e49\u5982\u4e0b&#xff0c;\u662f\u4e00\u4e2a\u5f02\u6b65IO\u7684\u63a7\u5236\u5757\u3002 &#xff08;\u5f02\u6b65\u4e00\u822c\u662f\u8ddf\u975e\u963b\u585e\u642d\u914d\u4f7f\u7528\u7684\u3002&#xff09;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201205-6802b215256c7.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>\u4e8c\u3001\u4e94\u79cdIO\u6a21\u578b<\/h2>\n<h3>2.1 \u963b\u585e blocking \u6a21\u578b<\/h3>\n<p>\u5f88\u7b80\u5355\u6765\u9610\u8ff0&#xff0c;\u5c31\u662f\u5fc5\u987b\u7b49\u5f85\u51fd\u6570\u8fd4\u56de&#xff0c;\u624d\u80fd\u5f80\u4e0b\u6267\u884c\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201205-6802b21563525.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.2 \u975e\u963b\u585e NIO \u6a21\u578b<\/h3>\n<p>\u975e\u963b\u585e\u7b49\u5f85&#xff0c;\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5c31\u53bb\u68c0\u6d4bI0\u4e8b\u4ef6\u662f\u5426\u5c31\u7eea\u3002\u6ca1\u6709\u5c31\u7eea\u5c31\u53ef\u4ee5\u505a\u5176\u4ed6\u4e8b\u3002\u975e\u963b\u585eI\/0\u6267\u884c\u7cfb\u7edf\u8c03\u7528\u603b\u662f\u7acb\u5373\u8fd4\u56de&#xff0c;\u4e0d\u7ba1\u4e8b\u4ef6\u662f\u5426\u5df2\u7ecf\u53d1\u751f&#xff0c;\u82e5\u4e8b\u4ef6\u6ca1\u6709\u53d1\u751f&#xff0c;\u5219\u8fd4\u56de-1&#xff0c;\u6b64\u65f6\u53ef\u4ee5\u6839\u636e errno \u533a\u5206\u8fd9\u4e24\u79cd\u60c5\u51b5&#xff0c;\u5bf9\u4e8eaccept&#xff0c;recv\u548csend&#xff0c;\u4e8b\u4ef6\u672a\u53d1\u751f\u65f6&#xff0c;errno\u901a\u5e38\u88ab\u8bbe\u7f6e\u6210 EAGAIN\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201205-6802b21594f23.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.3 IO\u591a\u8def\u590d\u7528<\/h3>\n<p>Linux \u7528 selectpoll\/epoll \u51fd\u6570\u5b9e\u73b0 IO\u590d\u7528\u6a21\u578b&#xff0c;\u8fd9\u4e9b\u51fd\u6570\u4e5f\u4f1a\u4f7f\u8fdb\u7a0b\u963b\u585e&#xff0c;\u4f46\u662f\u548c\u963b\u585eIO\u6240\u4e0d\u540c\u7684\u662f\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u540c\u65f6\u963b\u585e\u591a\u4e2aIO\u64cd\u4f5c\u3002\u800c\u4e14\u53ef\u4ee5\u540c\u65f6\u5bf9\u591a\u4e2a\u8bfb\u64cd\u4f5c\u3001\u5199\u64cd\u4f5c\u7684!0\u51fd\u6570\u8fdb\u884c\u68c0\u6d4b\u3002\u76f4\u5230\u6709\u6570\u636e\u53ef\u8bfb\u6216\u53ef\u5199\u65f6&#xff0c;\u624d\u771f\u6b63\u8c03\u7528I0\u64cd\u4f5c\u51fd\u6570\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201205-6802b215c6b88.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.4 \u4fe1\u53f7\u9a71\u52a8Signal-driven<\/h3>\n<p>Linux \u7528\u5957\u63a5\u53e3\u8fdb\u884c\u4fe1\u53f7\u9a71\u52a8 IO&#xff0c;\u5b89\u88c5\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u51fd\u6570&#xff0c;\u8fdb\u7a0b\u7ee7\u7eed\u8fd0\u884c\u5e76\u4e0d\u963b\u585e&#xff0c;\u5f53IO\u4e8b\u4ef6\u5c31\u7eea&#xff0c;\u8fdb\u7a0b\u6536\u5230SIGIO \u4fe1\u53f7&#xff0c;\u7136\u540e\u5904\u7406 IO \u4e8b\u4ef6\u3002<\/p>\n<p>\u5185\u6838\u5728\u7b2c\u4e00\u4e2a\u9636\u6bb5\u662f\u5f02\u6b65&#xff0c;\u5728\u7b2c\u4e8c\u4e2a\u9636\u6bb5\u662f\u540c\u6b65&#xff1b;\u4e0e\u975e\u963b\u585eIO\u7684\u533a\u522b\u5728\u4e8e\u5b83\u63d0\u4f9b\u4e86\u6d88\u606f\u901a\u77e5\u673a\u5236&#xff0c;\u4e0d\u9700\u8981\u7528\u6237\u8fdb\u7a0b\u4e0d\u65ad\u7684\u8f6e\u8be2\u68c0\u67e5&#xff0c;\u51cf\u5c11\u4e86\u7cfb\u7edfAPI\u7684\u8c03\u7528\u6b21\u6570&#xff0c;\u63d0\u9ad8\u4e86\u6548\u7387\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201206-6802b2160518d.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>2.5 \u5f02\u6b65<\/h3>\n<p>Linux\u4e2d&#xff0c;\u53ef\u4ee5\u8c03\u7528 aio_read \u51fd\u6570\u544a\u8bc9\u5185\u6838\u63cf\u8ff0\u5b57\u7f13\u51b2\u533a\u6307\u9488\u548c\u7f13\u51b2\u533a\u7684\u5927\u5c0f\u3001\u6587\u4ef6\u504f\u79fb\u53ca\u901a\u77e5\u7684\u65b9\u5f0f&#xff0c;\u7136\u540e\u7acb\u5373\u8fd4\u56de&#xff0c;\u5f53\u5185\u6838\u5c06\u6570\u636e\u62f7\u8d1d\u5230\u7f13\u51b2\u533a\u540e&#xff0c;\u518d\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\u3002 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201206-6802b21637803.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>\u4e09\u3001Web Sever \u7f51\u9875\u670d\u52a1\u5668<\/h2>\n<p>WebServer\u5c31\u662f\u4e00\u4e2a\u670d\u52a1\u5668\u8f6f\u4ef6\u7a0b\u5e8f&#xff0c;\u6216\u8005\u8fd0\u884c\u8fd9\u4e2a\u670d\u52a1\u5668\u8f6f\u4ef6\u7684\u786c\u4ef6&#xff08;\u8ba1\u7b97&#xff09;\u3002\u4e3b\u8981\u662f\u901a\u8fc7HTTP\u534f\u8bae\u4e0e\u5ba2\u6237\u7aef\u8fdb\u884c\u901a\u4fe1&#xff0c;\u63a5\u6536\u8bf7\u6c42&#xff0c;\u7136\u540e\u505a\u51faHTTP\u54cd\u5e94\u3002<\/p>\n<p>\u901a\u5e38\u7528\u6237\u4f7f\u7528 Web \u6d4f\u89c8\u5668\u4e0e\u76f8\u5e94\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\u3002\u5728\u6d4f\u89c8\u5668\u4e2d\u952e\u5165\u201c\u57df\u540d&#034;\u6216&#034;IP\u5730\u5740:\u7aef\u53e3\u53f7\u201d&#xff0c;\u6d4f\u89c8\u5668\u5219\u5148\u5c06\u4f60\u7684\u57df\u540d\u89e3\u6790\u6210\u76f8\u5e94\u7684 IP \u5730\u5740\u6216\u8005\u76f4\u63a5\u6839\u636e\u4f60\u7684IP\u5730\u5740\u5411\u5bf9\u5e94\u7684 Web \u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a HTTP \u8bf7\u6c42\u3002\u8fd9\u4e00\u8fc7\u7a0b\u9996\u5148\u8981\u901a\u8fc7 TCP \u534f\u8bae\u7684\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u4e0e\u76ee\u6807 Web \u670d\u52a1\u5668\u7684\u8fde\u63a5&#xff0c;\u7136\u540e HTTP \u534f\u8bae\u751f\u6210\u9488\u5bf9\u76ee\u6807 Web \u670d\u52a1\u5668\u7684 HTTP \u8bf7\u6c42\u62a5\u6587&#xff0c;\u901a\u8fc7 TCP\u3001IP \u7b49\u534f\u8bae\u53d1\u9001\u5230\u76ee\u6807 Web \u670d\u52a1\u5668\u4e0a\u3002<\/p>\n<p>HTTP\u5047\u5b9a\u5176\u4e0b\u5c42\u534f\u8bae\u5fc5\u987b\u63d0\u4f9b\u53ef\u9760\u7684\u4f20\u8f93\u3002\u56e0\u6b64&#xff0c;\u4efb\u4f55\u80fd\u591f\u63d0\u4f9b\u8fd9\u79cd\u4fdd\u8bc1\u7684\u534f\u8bae\u90fd\u53ef\u4ee5\u88ab\u5176\u4f7f\u7528&#xff0c;\u56e0\u6b64\u4e5f\u5c31\u662f\u5176\u5728TCP\/IP\u534f\u8bae\u65cf\u4f7f\u7528TCP\u4f5c\u4e3a\u5176\u4f20\u8f93\u5c42\u3002<\/p>\n<h3>3.1 HTTP\u7684\u8bf7\u6c42\u54cd\u5e94\u6b65\u9aa4<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201206-6802b216677d8.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>3.2 HTTP\u8bf7\u6c42\u4e0e\u54cd\u5e94\u62a5\u6587\u683c\u5f0f<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201206-6802b216b67c9.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201206-6802b216e042f.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>3.3 HTTP\u8bf7\u6c42\u65b9\u6cd5<\/h3>\n<p>GET&#xff1a;\u7528\u4e8e\u8bf7\u6c42\u6307\u5b9a\u8d44\u6e90\u7684\u6570\u636e\u3002GET \u8bf7\u6c42\u5e94\u8be5\u53ea\u88ab\u7528\u4e8e\u83b7\u53d6\u6570\u636e&#xff0c;\u5e76\u4e14\u4e0d\u4f1a\u5bf9\u670d\u52a1\u5668\u4e0a\u7684\u6570\u636e\u4ea7\u751f\u4efb\u4f55\u5f71\u54cd\u3002<\/p>\n<p>POST&#xff1a;\u7528\u4e8e\u5411\u6307\u5b9a\u8d44\u6e90\u63d0\u4ea4\u6570\u636e&#xff0c;\u901a\u5e38\u5bfc\u81f4\u670d\u52a1\u5668\u4e0a\u7684\u6570\u636e\u88ab\u521b\u5efa\u6216\u4fee\u6539\u3002POST \u8bf7\u6c42\u901a\u5e38\u7528\u4e8e\u8868\u5355\u63d0\u4ea4\u3002<\/p>\n<p>PUT&#xff1a;\u7528\u4e8e\u5c06\u8bf7\u6c42\u4f53\u4e2d\u5305\u542b\u7684\u6570\u636e\u66ff\u6362\u6307\u5b9a\u8d44\u6e90\u7684\u5168\u90e8\u5185\u5bb9\u3002\u5982\u679c\u8be5\u8d44\u6e90\u4e0d\u5b58\u5728&#xff0c;\u670d\u52a1\u5668\u53ef\u80fd\u4f1a\u6839\u636e\u8bf7\u6c42\u521b\u5efa\u65b0\u8d44\u6e90\u3002<\/p>\n<p>DELETE&#xff1a;\u7528\u4e8e\u5220\u9664\u6307\u5b9a\u7684\u8d44\u6e90\u3002<\/p>\n<p>HEAD&#xff1a;\u7c7b\u4f3c\u4e8e GET \u8bf7\u6c42&#xff0c;\u4f46\u4e0d\u8fd4\u56de\u54cd\u5e94\u4f53\u3002HEAD \u8bf7\u6c42\u7528\u4e8e\u83b7\u53d6\u8d44\u6e90\u7684\u5143\u6570\u636e&#xff0c;\u5982 HTTP \u5934\u4fe1\u606f\u3002<\/p>\n<p>OPTIONS&#xff1a;\u7528\u4e8e\u83b7\u53d6\u76ee\u6807\u8d44\u6e90\u6240\u652f\u6301\u7684\u901a\u4fe1\u9009\u9879\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7ecf\u5e38\u7528\u4e8e\u8de8\u6e90\u8d44\u6e90\u5171\u4eab&#xff08;CORS&#xff09;\u8bf7\u6c42&#xff0c;\u4ee5\u786e\u5b9a\u670d\u52a1\u5668\u652f\u6301\u54ea\u4e9b HTTP \u65b9\u6cd5\u3002<\/p>\n<p>PATCH&#xff1a;\u7528\u4e8e\u5bf9\u5df2\u77e5\u8d44\u6e90\u8fdb\u884c\u90e8\u5206\u4fee\u6539\u3002\u4e0e PUT \u4e0d\u540c&#xff0c;PATCH \u901a\u5e38\u7528\u4e8e\u5bf9\u8d44\u6e90\u8fdb\u884c\u5c0f\u7684\u3001\u5c40\u90e8\u7684\u4fee\u6539\u3002<\/p>\n<p>CONNECT&#xff1a;\u5c06\u8fde\u63a5\u6539\u4e3a\u7ba1\u9053\u65b9\u5f0f\u7684\u4ee3\u7406\u8bf7\u6c42\u3002CONNECT \u65b9\u6cd5\u4e3b\u8981\u7528\u4e8e\u521b\u5efa\u96a7\u9053&#xff0c;\u4f8b\u5982&#xff0c;\u5728\u4ee3\u7406\u670d\u52a1\u5668\u4e0a\u5efa\u7acb SSL \u52a0\u5bc6\u901a\u9053\u3002<\/p>\n<h3>3.4 HTTP\u72b6\u6001\u7801<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250418201207-6802b21717442.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h3>3.4 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