{"id":82890,"date":"2026-07-25T14:10:19","date_gmt":"2026-07-25T06:10:19","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/82890.html"},"modified":"2026-07-25T14:10:19","modified_gmt":"2026-07-25T06:10:19","slug":"http-%e5%8d%8f%e8%ae%ae%e5%ba%95%e5%b1%82-tcp-%e4%bc%a0%e8%be%93%e5%8e%9f%e7%90%86-%e4%bb%8e%e8%be%93%e5%85%a5-url-%e5%88%b0%e7%9c%8b%e5%88%b0%e9%a1%b5%e9%9d%a2%e5%8f%91%e7%94%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/82890.html","title":{"rendered":"HTTP \u534f\u8bae\u5e95\u5c42 TCP \u4f20\u8f93\u539f\u7406\u2014\u2014\u4ece\u8f93\u5165 URL \u5230\u770b\u5230\u9875\u9762\u53d1\u751f\u4e86\u4ec0\u4e48\uff1f"},"content":{"rendered":"<h2>HTTP \u534f\u8bae\u5e95\u5c42 TCP \u4f20\u8f93\u539f\u7406\u2014\u2014\u4ece\u8f93\u5165 URL \u5230\u770b\u5230\u9875\u9762\u53d1\u751f\u4e86\u4ec0\u4e48&#xff1f;<\/h2>\n<h3>\u524d\u8a00<\/h3>\n<p>HTTP&#xff08;\u8d85\u6587\u672c\u4f20\u8f93\u534f\u8bae&#xff09;\u662f\u4e07\u7ef4\u7f51\u7684\u57fa\u77f3&#xff0c;\u6253\u5f00\u6d4f\u89c8\u5668\u5c31\u79bb\u4e0d\u5f00\u5b83\u3002\u4f46 HTTP \u4f4d\u4e8e\u5e94\u7528\u5c42&#xff0c;\u771f\u6b63\u5e2e\u5b83\u628a\u6570\u636e\u4ece\u670d\u52a1\u5668\u642c\u5230\u6d4f\u89c8\u5668\u7684\u662f\u4f20\u8f93\u5c42\u7684 TCP\u3002<\/p>\n<p>\u5728\u6d4f\u89c8\u5668\u8f93\u5165\u7f51\u5740\u5e76\u6309\u4e0b\u56de\u8f66\u7684\u90a3\u4e00\u77ac\u95f4&#xff0c;\u5b9e\u9645\u53d1\u751f\u7684\u4e0d\u662f&#034;\u8bf7\u6c42-\u54cd\u5e94&#034;\u8fd9\u4e48\u7b80\u5355&#xff0c;\u800c\u662f\u4e00\u6761\u5b8c\u6574\u7684\u94fe\u8def&#xff1a;DNS \u89e3\u6790 \u2192 TCP \u4e09\u6b21\u63e1\u624b \u2192 HTTP \u8bf7\u6c42\u62a5\u6587 \u2192 HTTP \u54cd\u5e94\u62a5\u6587 \u2192 TCP \u56db\u6b21\u6325\u624b\u3002<\/p>\n<p>\u7531\u4e8e\u6d89\u53ca\u5927\u91cf\u7f51\u7edc\u534f\u8bae&#xff0c;\u53ef\u4ee5\u975e\u5e38\u76f4\u89c2\u5730\u8003\u5bdf\u5bf9\u8ba1\u7b97\u673a\u7f51\u7edc\u4f53\u7cfb\u7684\u6574\u4f53\u628a\u63e1\u7a0b\u5ea6&#xff0c;\u6240\u4ee5\u81ea\u7136\u6210\u4e3a\u4e86\u5404\u5927\u516c\u53f8\u7684\u9762\u8bd5\u5e38\u5ba2\u3002<\/p>\n<p>\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u8be6\u7ec6\u62c6\u89e3\u8fd9\u4e2a\u7f51\u7edc\u901a\u4fe1\u8fc7\u7a0b\u3002<\/p>\n<hr \/>\n<h3>1. DNS \u89e3\u6790&#xff1a;\u57df\u540d\u600e\u4e48\u53d8\u6210 IP<\/h3>\n<p>\u4e92\u8054\u7f51\u4e0a\u7684\u6bcf\u4e00\u53f0\u4e3b\u673a\u90fd\u6709\u552f\u4e00\u7684 IP \u5730\u5740&#xff0c;\u4f46 IP \u5730\u5740\u662f\u4e00\u4e32\u6570\u5b57&#xff0c;\u6bd4\u5982 110.242.68.66&#xff0c;\u6ca1\u4eba\u613f\u610f\u8bb0\u4f4f\u5b83\u3002<\/p>\n<p>\u4e8e\u662f\u6709\u4e86\u57df\u540d\u7cfb\u7edf&#xff08;DNS&#xff09;\u3002\u4f60\u5728\u6d4f\u89c8\u5668\u8f93\u5165 baidu.com&#xff0c;\u6d4f\u89c8\u5668\u4f1a\u5148\u5411 DNS \u670d\u52a1\u5668\u67e5\u8be2\u8fd9\u4e2a\u57df\u540d\u5bf9\u5e94\u7684 IP \u5730\u5740&#xff0c;\u7136\u540e\u7528 IP \u53bb\u5efa\u7acb\u8fde\u63a5\u3002\u5728\u6d4f\u89c8\u5668\u6309 F12 \u6253\u5f00\u5f00\u53d1\u8005\u5de5\u5177&#xff0c;Network \u9762\u677f\u91cc\u80fd\u770b\u5230\u6bcf\u4e2a\u8bf7\u6c42\u5bf9\u5e94\u7684\u771f\u5b9e IP\u3002<\/p>\n<p>DNS \u67e5\u8be2\u7684\u7b80\u5316\u6d41\u7a0b&#xff1a;<\/p>\n<li>\u6d4f\u89c8\u5668\u5148\u67e5\u672c\u5730\u7f13\u5b58&#xff0c;\u770b\u770b\u8fd9\u4e2a\u57df\u540d\u6700\u8fd1\u89e3\u6790\u8fc7\u6ca1\u6709<\/li>\n<li>\u6ca1\u547d\u4e2d\u7f13\u5b58&#xff0c;\u5c31\u5411\u672c\u5730 DNS \u670d\u52a1\u5668\u53d1\u8d77\u67e5\u8be2<\/li>\n<li>DNS \u670d\u52a1\u5668\u8fd4\u56de IP \u5730\u5740\u7ed9\u6d4f\u89c8\u5668<\/li>\n<li>\u6d4f\u89c8\u5668\u62ff\u5230 IP&#xff0c;\u5f00\u59cb\u5efa\u7acb TCP \u8fde\u63a5<\/li>\n<p>\u914d\u5408\u4e0b\u56fe\u76f4\u89c2\u7406\u89e3&#xff1a;<\/p>\n<p>\u6d4f\u89c8\u5668\u7f13\u5b58 \u2192 \u7cfb\u7edf\u7f13\u5b58 \u2192 \u672c\u5730\u57df\u540d\u670d\u52a1\u5668 \u2192 \u6839\u57df\u540d\u670d\u52a1\u5668 \u2192 \u9876\u7ea7\u57df\u540d\u670d\u52a1\u5668 \u2192 \u6743\u9650\u57df\u540d\u670d\u52a1\u5668<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f&#xff0c;DNS \u4f7f\u7528\u7684\u662f UDP \u534f\u8bae&#xff0c;\u4e5f\u5c31\u662f\u8bf4\u4e0a\u9762\u5404\u79cd\u8bf7\u6c42\u7684\u8f6c\u53d1&#xff0c;\u90fd\u662f\u57fa\u4e8e UDP \u8fd9\u4e2a\u65e0\u8fde\u63a5\u534f\u8bae\u7684\u3002<\/p>\n<hr \/>\n<h3>2. TCP \u4e09\u6b21\u63e1\u624b&#xff1a;\u4e3a HTTP \u62a5\u6587\u94fa\u8def<\/h3>\n<p>HTTP \u9009\u62e9 TCP \u4f5c\u4e3a\u4f20\u8f93\u5c42\u534f\u8bae&#xff0c;\u662f\u56e0\u4e3a HTTP \u8981\u6c42\u6570\u636e\u5b8c\u6574\u3001\u6709\u5e8f\u5230\u8fbe&#xff0c;\u800c TCP \u7684\u786e\u8ba4\u5e94\u7b54\u548c\u91cd\u4f20\u673a\u5236\u6b63\u597d\u6ee1\u8db3\u8fd9\u4e2a\u9700\u6c42\u3002<\/p>\n<p>\u5728 HTTP \u62a5\u6587\u4f20\u8f93\u4e4b\u524d&#xff0c;TCP \u5fc5\u987b\u5148\u5b8c\u6210\u4e09\u6b21\u63e1\u624b&#xff0c;\u786e\u8ba4\u53cc\u65b9\u7684\u6536\u53d1\u80fd\u529b\u90fd\u6b63\u5e38&#xff1a;<\/p>\n<li>\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u7aef&#xff1a;SYN&#061;1, seq&#061;x&#xff08;\u8bf7\u6c42\u5efa\u7acb\u8fde\u63a5&#xff09;<\/li>\n<li>\u670d\u52a1\u7aef \u2192 \u5ba2\u6237\u7aef&#xff1a;SYN&#061;1, ACK&#061;1, seq&#061;y, ack&#061;x&#043;1&#xff08;\u786e\u8ba4\u6536\u5230&#xff0c;\u53d1\u9001\u81ea\u5df1\u7684\u5e8f\u5217\u53f7&#xff09;<\/li>\n<li>\u5ba2\u6237\u7aef \u2192 \u670d\u52a1\u7aef&#xff1a;ACK&#061;1, seq&#061;x&#043;1, ack&#061;y&#043;1&#xff08;\u786e\u8ba4\u670d\u52a1\u7aef\u7684\u5e8f\u5217\u53f7&#xff0c;\u8fde\u63a5\u5efa\u7acb&#xff09;<\/li>\n<p>\u4e09\u6b21\u63e1\u624b\u4e4b\u540e&#xff0c;\u53cc\u65b9\u8fdb\u5165 ESTABLISHED \u72b6\u6001&#xff0c;HTTP \u62a5\u6587\u5c31\u53ef\u4ee5\u5f00\u59cb\u4f20\u8f93\u4e86\u3002<\/p>\n<p>\u7528 Wireshark \u6293\u5305\u89c2\u5bdf\u4e00\u6b21\u6700\u7b80\u5355\u7684 HTTP \u8bf7\u6c42-\u54cd\u5e94&#xff0c;TCP \u534f\u8bae\u4e00\u5171\u6536\u53d1\u4e86 11 \u4e2a\u5305&#xff0c;\u53ef\u4ee5\u5f52\u7eb3\u4e3a 4 \u4e2a\u8fc7\u7a0b&#xff1a;<\/p>\n<li>\u4e09\u6b21\u63e1\u624b&#xff08;3 \u4e2a\u5305&#xff09;&#xff1a;\u5efa\u7acb\u8fde\u63a5<\/li>\n<li>HTTP \u8bf7\u6c42 &#043; ACK&#xff08;2 \u4e2a\u5305&#xff09;&#xff1a;\u6d4f\u89c8\u5668\u53d1\u9001\u8bf7\u6c42\u62a5\u6587&#xff0c;\u670d\u52a1\u5668\u786e\u8ba4\u6536\u5230<\/li>\n<li>HTTP \u54cd\u5e94 &#043; ACK&#xff08;2 \u4e2a\u5305&#xff09;&#xff1a;\u670d\u52a1\u5668\u8fd4\u56de\u54cd\u5e94\u62a5\u6587&#xff0c;\u6d4f\u89c8\u5668\u786e\u8ba4\u6536\u5230<\/li>\n<li>\u56db\u6b21\u6325\u624b&#xff08;4 \u4e2a\u5305&#xff09;&#xff1a;\u91ca\u653e\u8fde\u63a5<\/li>\n<p>\u9664\u53bb\u63e1\u624b\u548c\u6325\u624b&#xff0c;\u771f\u6b63\u4f20\u8f93 HTTP \u6570\u636e\u7684\u53ea\u6709 4 \u4e2a\u5305\u2014\u2014\u6d4f\u89c8\u5668\u53d1\u9001\u8bf7\u6c42\u62a5\u6587\u3001\u670d\u52a1\u5668\u56de\u590d ACK\u3001\u670d\u52a1\u5668\u53d1\u9001\u54cd\u5e94\u62a5\u6587\u3001\u6d4f\u89c8\u5668\u56de\u590d ACK\u3002<\/p>\n<hr \/>\n<h3>3. HTTP \u8bf7\u6c42\u62a5\u6587&#xff1a;\u6d4f\u89c8\u5668\u600e\u4e48\u5411\u670d\u52a1\u5668\u8981\u6570\u636e<\/h3>\n<p>HTTP \u8bf7\u6c42\u62a5\u6587\u7531\u4e09\u90e8\u5206\u7ec4\u6210&#xff1a;\u8d77\u59cb\u884c\u3001\u5934\u90e8\u5b57\u6bb5\u3001\u6d88\u606f\u6b63\u6587\u3002<\/p>\n<p>\u8d77\u59cb\u884c\u662f\u8bf7\u6c42\u884c&#xff0c;\u5305\u542b\u4e09\u4e2a\u8981\u7d20&#xff1a;<\/p>\n<ul>\n<li>\u8bf7\u6c42\u65b9\u6cd5&#xff1a;\u4e00\u4e2a\u52a8\u8bcd&#xff0c;GET \u83b7\u53d6\u8d44\u6e90&#xff0c;POST \u63d0\u4ea4\u6570\u636e&#xff0c;PUT \u66f4\u65b0&#xff0c;DELETE \u5220\u9664<\/li>\n<li>\u8bf7\u6c42\u76ee\u6807&#xff1a;URI&#xff0c;\u6807\u8bb0\u8981\u64cd\u4f5c\u7684\u8d44\u6e90\u8def\u5f84<\/li>\n<li>\u534f\u8bae\u7248\u672c&#xff1a;HTTP\/1.1<\/li>\n<\/ul>\n<p>\u4e00\u4e2a\u5b8c\u6574\u7684\u8bf7\u6c42\u884c\u957f\u8fd9\u6837&#xff1a;<\/p>\n<p>GET \/index HTTP\/1.1<\/p>\n<p>\u8fd9\u884c\u6307\u4ee4\u548c\u4f60\u5728\u6d4f\u89c8\u5668\u5730\u5740\u680f\u8f93\u5165 http:\/\/127.0.0.1:80\/index \u662f\u7b49\u4ef7\u7684\u3002<\/p>\n<p>\u5934\u90e8\u5b57\u6bb5\u4ee5 key-value \u683c\u5f0f\u63cf\u8ff0\u8bf7\u6c42\u7684\u9644\u52a0\u4fe1\u606f&#xff0c;\u6bd4\u5982\u5ba2\u6237\u7aef\u63a5\u53d7\u7684\u7f16\u7801\u683c\u5f0f\u3001\u8bed\u8a00\u504f\u597d\u7b49&#xff0c;\u8fd9\u91cc\u4e0d\u5c55\u5f00\u3002\u6d88\u606f\u6b63\u6587\u5728 GET \u8bf7\u6c42\u4e2d\u901a\u5e38\u4e3a\u7a7a&#xff0c;POST \u8bf7\u6c42\u5219\u643a\u5e26\u8868\u5355\u6570\u636e\u6216 JSON\u3002<\/p>\n<p>\u4e0b\u9762\u7528 Go net \u5305\u53d1\u9001\u4e00\u4e2a\u6700\u5c0f\u7684 HTTP GET \u8bf7\u6c42&#xff0c;\u76f4\u89c2\u611f\u53d7\u4e00\u4e0b&#xff1a;<\/p>\n<p>conn<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> net<span class=\"token punctuation\">.<\/span><span class=\"token function\">Dial<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;tcp&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;localhost:8001&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    log<span class=\"token punctuation\">.<\/span><span class=\"token function\">Fatal<\/span><span class=\"token punctuation\">(<\/span>err<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">defer<\/span> conn<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u53d1\u9001 HTTP \u8bf7\u6c42\u884c<\/span><br \/>\nconn<span class=\"token punctuation\">.<\/span><span class=\"token function\">Write<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token function\">byte<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;GET \/index HTTP\/1.1\\\\r\\\\n\\\\r\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5173\u95ed\u5199\u7aef&#xff0c;\u544a\u8bc9\u670d\u52a1\u5668&#034;\u6211\u53d1\u5b8c\u4e86&#034;<\/span><br \/>\nconn<span class=\"token punctuation\">.<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>net<span class=\"token punctuation\">.<\/span>TCPConn<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">CloseWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8bfb\u53d6\u670d\u52a1\u5668\u54cd\u5e94<\/span><br \/>\nbuffer <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">make<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">byte<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2048<\/span><span class=\"token punctuation\">)<\/span><br \/>\nlength<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> conn<span class=\"token punctuation\">.<\/span><span class=\"token function\">Read<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    log<span class=\"token punctuation\">.<\/span><span class=\"token function\">Fatal<\/span><span class=\"token punctuation\">(<\/span>err<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\nfmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">string<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">:<\/span>length<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>\u5173\u952e\u70b9\u62c6\u89e3&#xff1a;<\/p>\n<ul>\n<li>net.Dial(\u201ctcp\u201d, \u201clocalhost:8001\u201d) \u5efa\u7acb TCP \u8fde\u63a5\u5230\u670d\u52a1\u5668\u7684 8001 \u7aef\u53e3<\/li>\n<li>conn.Write(\u2026) \u628a HTTP \u8bf7\u6c42\u884c\u4ee5\u5b57\u8282\u6d41\u5f62\u5f0f\u5199\u51fa\u53bb&#xff0c;\u5e95\u5c42\u8d70\u7684\u5c31\u662f TCP<\/li>\n<li>CloseWrite() \u544a\u8bc9\u670d\u52a1\u5668&#034;\u6211\u53d1\u5b8c\u4e86&#034;&#xff0c;\u670d\u52a1\u5668\u624d\u4f1a\u5f00\u59cb\u5904\u7406\u5e76\u8fd4\u56de\u54cd\u5e94<\/li>\n<li>\u54cd\u5e94\u4e5f\u662f\u4e00\u4e2a\u5b57\u8282\u6d41&#xff0c;\u901a\u8fc7 conn.Read() \u63a5\u6536<\/li>\n<\/ul>\n<p>\u4f60\u5728\u6d4f\u89c8\u5668\u8f93\u5165 URL \u7684\u8fc7\u7a0b&#xff0c;\u672c\u8d28\u4e0a\u5c31\u662f\u8fd9\u6bb5\u4ee3\u7801\u5728\u5e95\u5c42\u505a\u7684\u4e8b\u3002<\/p>\n<hr \/>\n<h3>4. HTTP \u54cd\u5e94\u62a5\u6587&#xff1a;\u670d\u52a1\u5668\u600e\u4e48\u628a\u9875\u9762\u8fd4\u56de<\/h3>\n<p>\u670d\u52a1\u5668\u6536\u5230 HTTP \u8bf7\u6c42\u540e&#xff0c;\u89e3\u6790\u8bf7\u6c42\u884c&#xff0c;\u627e\u5230\u5bf9\u5e94\u7684\u8d44\u6e90&#xff0c;\u6784\u9020\u54cd\u5e94\u62a5\u6587\u8fd4\u56de\u3002<\/p>\n<p>\u54cd\u5e94\u62a5\u6587\u540c\u6837\u7531\u4e09\u90e8\u5206\u7ec4\u6210&#xff1a;\u8d77\u59cb\u884c&#xff08;\u54cd\u5e94\u884c&#xff09;\u3001\u5934\u90e8\u5b57\u6bb5\u3001\u6d88\u606f\u6b63\u6587\u3002<\/p>\n<p>\u54cd\u5e94\u884c\u5305\u542b\u4e09\u4e2a\u8981\u7d20&#xff1a;<\/p>\n<ul>\n<li>\u534f\u8bae\u7248\u672c&#xff1a;HTTP\/1.1<\/li>\n<li>\u72b6\u6001\u7801&#xff1a;\u4e09\u4f4d\u6570\u5b57&#xff0c;200 \u8868\u793a\u6210\u529f&#xff0c;404 \u8868\u793a\u8d44\u6e90\u4e0d\u5b58\u5728&#xff0c;500 \u8868\u793a\u670d\u52a1\u5668\u5185\u90e8\u9519\u8bef<\/li>\n<li>\u539f\u56e0\u77ed\u8bed&#xff1a;\u72b6\u6001\u7801\u7684\u6587\u5b57\u8bf4\u660e&#xff0c;\u6bd4\u5982 OK\u3001Not Found<\/li>\n<\/ul>\n<p>\u4e00\u4e2a\u8ba9\u5f00\u53d1\u8005\u6700\u5b89\u5fc3\u7684\u54cd\u5e94\u884c&#xff1a;<\/p>\n<p>HTTP\/1.1 200 OK<\/p>\n<p>\u5e38\u89c1\u72b6\u6001\u7801\u5206\u7c7b&#xff1a;<\/p>\n<ul>\n<li>1xx&#xff1a;\u4fe1\u606f\u63d0\u793a&#xff0c;\u8bf7\u6c42\u5df2\u6536\u5230&#xff0c;\u7ee7\u7eed\u5904\u7406<\/li>\n<li>2xx&#xff1a;\u6210\u529f&#xff0c;200 OK \u6700\u5e38\u89c1<\/li>\n<li>3xx&#xff1a;\u91cd\u5b9a\u5411&#xff0c;\u8d44\u6e90\u6362\u4e86\u4f4d\u7f6e<\/li>\n<li>4xx&#xff1a;\u5ba2\u6237\u7aef\u9519\u8bef&#xff0c;404 Not Found&#xff08;\u8def\u5f84\u5199\u9519&#xff09;\u3001400 Bad Request&#xff08;\u53c2\u6570\u4e0d\u5bf9&#xff09;<\/li>\n<li>5xx&#xff1a;\u670d\u52a1\u7aef\u9519\u8bef&#xff0c;500 Internal Server Error&#xff08;\u4ee3\u7801\u5d29\u4e86&#xff09;<\/li>\n<\/ul>\n<p>\u670d\u52a1\u5668\u7684\u54cd\u5e94\u5206\u4e3a\u9759\u6001\u548c\u52a8\u6001\u4e24\u79cd\u3002\u9759\u6001\u54cd\u5e94\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a HTML \u6587\u4ef6&#xff0c;\u52a8\u6001\u54cd\u5e94\u9700\u8981\u6839\u636e\u8bf7\u6c42\u53c2\u6570&#xff08;\u6bd4\u5982\u7528\u6237 ID&#xff09;\u751f\u6210\u4e2a\u6027\u5316\u5185\u5bb9\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u5904\u7406\u9759\u6001\u54cd\u5e94\u7684\u6700\u5c0f TCP \u670d\u52a1\u7aef\u4ee3\u7801&#xff1a;<\/p>\n<p>listener<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> net<span class=\"token punctuation\">.<\/span><span class=\"token function\">Listen<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;tcp&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;:8001&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    log<span class=\"token punctuation\">.<\/span><span class=\"token function\">Fatal<\/span><span class=\"token punctuation\">(<\/span>err<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">defer<\/span> listener<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>fmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u542f\u52a8\u670d\u52a1\u5668&#xff0c;\u76d1\u542c\u7aef\u53e3&#xff1a;8001&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    conn<span class=\"token punctuation\">,<\/span> err <span class=\"token operator\">:&#061;<\/span> listener<span class=\"token punctuation\">.<\/span><span class=\"token function\">Accept<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> err <span class=\"token operator\">!&#061;<\/span> <span class=\"token boolean\">nil<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        log<span class=\"token punctuation\">.<\/span><span class=\"token function\">Println<\/span><span class=\"token punctuation\">(<\/span>err<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token keyword\">continue<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">go<\/span> <span class=\"token keyword\">func<\/span><span class=\"token punctuation\">(<\/span>c net<span class=\"token punctuation\">.<\/span>Conn<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">defer<\/span> c<span class=\"token punctuation\">.<\/span><span class=\"token function\">Close<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        buffer <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">make<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token builtin\">byte<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4096<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        length<span class=\"token punctuation\">,<\/span> <span class=\"token boolean\">_<\/span> <span class=\"token operator\">:&#061;<\/span> c<span class=\"token punctuation\">.<\/span><span class=\"token function\">Read<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><br \/>\n        requestLine <span class=\"token operator\">:&#061;<\/span> <span class=\"token function\">string<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">:<\/span>length<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u7b80\u5355\u89e3\u6790\u8bf7\u6c42\u884c&#xff0c;\u63d0\u53d6\u8def\u5f84<\/span><br \/>\n        parts <span class=\"token operator\">:&#061;<\/span> strings<span class=\"token punctuation\">.<\/span><span class=\"token function\">Fields<\/span><span class=\"token punctuation\">(<\/span>requestLine<span class=\"token punctuation\">)<\/span><br \/>\n        path <span class=\"token operator\">:&#061;<\/span> parts<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u6784\u9020\u54cd\u5e94<\/span><br \/>\n        body <span class=\"token operator\">:&#061;<\/span> fmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Sprintf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;&lt;h1&gt;Hello, you requested: %s&lt;\/h1&gt;&#034;<\/span><span class=\"token punctuation\">,<\/span> path<span class=\"token punctuation\">)<\/span><br \/>\n        response <span class=\"token operator\">:&#061;<\/span> fmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Sprintf<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            <span class=\"token string\">&#034;HTTP\/1.1 200 OK\\\\r\\\\n&#034;<\/span><span class=\"token operator\">&#043;<\/span><br \/>\n                <span class=\"token string\">&#034;Content-Length: %d\\\\r\\\\n&#034;<\/span><span class=\"token operator\">&#043;<\/span><br \/>\n                <span class=\"token string\">&#034;Content-Type: text\/html\\\\r\\\\n&#034;<\/span><span class=\"token operator\">&#043;<\/span><br \/>\n                <span class=\"token string\">&#034;\\\\r\\\\n%s&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token function\">len<\/span><span class=\"token punctuation\">(<\/span>body<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> body<span class=\"token punctuation\">)<\/span><\/p>\n<p>        c<span class=\"token punctuation\">.<\/span><span class=\"token function\">Write<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token function\">byte<\/span><span class=\"token punctuation\">(<\/span>response<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">(<\/span>conn<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5173\u952e\u70b9\u62c6\u89e3&#xff1a;<\/p>\n<ul>\n<li>net.Listen(\u201ctcp\u201d, \u201c:8001\u201d) \u76d1\u542c 8001 \u7aef\u53e3&#xff0c;\u8fd9\u4e2a\u7aef\u53e3\u5c31\u662f\u6d4f\u89c8\u5668\u91cc localhost:8001 \u6307\u5411\u7684\u76ee\u6807<\/li>\n<li>listener.Accept() \u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5&#xff0c;\u6bcf\u4e2a\u8fde\u63a5\u8fd4\u56de\u4e00\u4e2a Conn \u5bf9\u8c61<\/li>\n<li>\u7528 go \u5173\u952e\u5b57\u542f\u52a8 goroutine \u5904\u7406\u6bcf\u4e2a\u8fde\u63a5&#xff0c;\u5929\u7136\u652f\u6301\u5e76\u53d1<\/li>\n<li>\u89e3\u6790\u8bf7\u6c42\u884c&#xff0c;\u63d0\u53d6\u51fa\u8bf7\u6c42\u8def\u5f84<\/li>\n<li>\u6784\u9020\u5b8c\u6574\u7684 HTTP \u54cd\u5e94\u62a5\u6587&#xff08;\u72b6\u6001\u884c &#043; \u5934\u90e8 &#043; \u7a7a\u884c &#043; \u54cd\u5e94\u4f53&#xff09;&#xff0c;\u901a\u8fc7 Conn \u5199\u51fa\u53bb<\/li>\n<li>HTTP \u534f\u8bae\u4e0d\u5173\u5fc3\u6587\u4ef6\u5185\u5bb9\u662f\u4ec0\u4e48\u2014\u2014HTML\u3001\u56fe\u7247\u3001JSON&#xff0c;\u6700\u7ec8\u90fd\u8f6c\u6210\u5b57\u8282\u6d41\u901a\u8fc7 TCP \u53d1\u51fa\u53bb<\/li>\n<\/ul>\n<hr \/>\n<h3>\u603b\u7ed3<\/h3>\n<p>\u5c4f\u853d\u6389\u5e95\u5c42\u7ec6\u8282&#xff0c;\u7b3c\u7edf\u603b\u7ed3\u4e00\u4e0b\u4e0a\u8ff0\u8fc7\u7a0b&#xff1a;<\/p>\n<p>\u5e94\u7528\u5c42&#xff1a;<\/p>\n<ul>\n<li>\u6d4f\u89c8\u5668\u5c01\u88c5 HTTP \u8bf7\u6c42\u62a5\u6587<\/li>\n<li>DNS \u89e3\u6790\u57df\u540d\u83b7\u5f97\u76ee\u6807\u670d\u52a1\u5668\u5730\u5740<\/li>\n<\/ul>\n<p>\u4f20\u8f93\u5c42&#xff1a;<\/p>\n<ul>\n<li>TCP \u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fde\u63a5<\/li>\n<li>\u628a\u5e94\u7528\u5c42\u4f20\u8fc7\u6765\u7684 HTTP \u8bf7\u6c42\u62a5\u6587\u8fdb\u884c\u5206\u5272&#xff0c;\u5e76\u5728\u5404\u4e2a\u62a5\u6587\u4e0a\u6253\u4e0a\u6807\u8bb0\u5e8f\u53f7\u53ca\u7aef\u53e3\u53f7<\/li>\n<li>\u8f6c\u53d1\u7ed9\u7f51\u7edc\u5c42<\/li>\n<\/ul>\n<p>\u7f51\u7edc\u5c42&#xff1a;<\/p>\n<ul>\n<li>\u5229\u7528 ARP \u534f\u8bae\u6839\u636e IP \u5730\u5740\u83b7\u53d6\u4f5c\u4e3a\u901a\u4fe1\u76ee\u7684\u5730\u7684 MAC \u5730\u5740<\/li>\n<li>\u8f6c\u53d1\u7ed9\u94fe\u8def\u5c42<\/li>\n<\/ul>\n<p>\u670d\u52a1\u7aef\u5728\u94fe\u8def\u5c42\u6536\u5230\u6570\u636e&#xff0c;\u6309\u5e8f\u5f80\u4e0a\u5c42\u53d1\u9001&#xff0c;\u4e00\u76f4\u5230\u5e94\u7528\u5c42\u63a5\u6536\u5230\u6d4f\u89c8\u5668\u53d1\u9001\u6765\u7684 HTTP \u8bf7\u6c42\u62a5\u6587&#xff0c;\u7136\u540e\u5904\u7406\u8be5\u8bf7\u6c42\u5e76\u8fd4\u56de HTTP \u54cd\u5e94\u62a5\u6587&#xff0c;\u6d4f\u89c8\u5668\u63a5\u6536\u5230\u54cd\u5e94\u62a5\u6587\u4e4b\u540e\u89e3\u6790\u6e32\u67d3\u754c\u9762\u3002\u6700\u540e TCP \u56db\u6b21\u6325\u624b\u65ad\u5f00\u8fde\u63a5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>HTTP \u534f\u8bae\u5e95\u5c42 TCP \u4f20\u8f93\u539f\u7406\u2014\u2014\u4ece\u8f93\u5165 URL \u5230\u770b\u5230\u9875\u9762\u53d1\u751f\u4e86\u4ec0\u4e48&#xff1f;<br \/>\n\u524d\u8a00<br \/>\nHTTP&#xff08;\u8d85\u6587\u672c\u4f20\u8f93\u534f\u8bae&#xff09;\u662f\u4e07\u7ef4\u7f51\u7684\u57fa\u77f3&#xff0c;\u6253\u5f00\u6d4f\u89c8\u5668\u5c31\u79bb\u4e0d\u5f00\u5b83\u3002\u4f46 HTTP \u4f4d\u4e8e\u5e94\u7528\u5c42&#xff0c;\u771f\u6b63\u5e2e\u5b83\u628a\u6570\u636e\u4ece\u670d\u52a1\u5668\u642c\u5230\u6d4f\u89c8\u5668\u7684\u662f\u4f20\u8f93\u5c42\u7684 TCP\u3002<br \/>\n\u5728\u6d4f\u89c8\u5668\u8f93\u5165\u7f51\u5740\u5e76\u6309\u4e0b\u56de\u8f66\u7684\u90a3\u4e00\u77ac\u95f4&#xff0c;\u5b9e\u9645\u53d1\u751f\u7684\u4e0d\u662f\\&#8221;\u8bf7\u6c42-\u54cd\u5e94\\&#8221;\u8fd9\u4e48\u7b80\u5355&#xff0c;\u800c\u662f\u4e00\u6761\u5b8c\u6574\u7684\u94fe\u8def&#xff1a;DNS \u89e3\u6790 \u2192 TCP 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