{"id":4020,"date":"2025-11-12T11:06:34","date_gmt":"2025-11-12T03:06:34","guid":{"rendered":"https:\/\/gaigaiming.com\/?p=4020"},"modified":"2026-03-13T14:16:46","modified_gmt":"2026-03-13T06:16:46","slug":"websocket%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.gaigaiming.com\/index.php\/2025\/11\/12\/websocket%e8%af%a6%e8%a7%a3\/","title":{"rendered":"websocket\u8be6\u89e3"},"content":{"rendered":"<p>\u672c\u6587\u7531\u4f5c\u8005\u201c\u963f\u5b9d\u54e5\u201d\u5206\u4eab\uff0c\u539f\u9898\u201c\u4f60\u4e0d\u77e5\u9053\u7684 WebSocket\u201d\uff0c\u6709\u4fee\u8ba2\u548c\u6539\u52a8\u3002<\/p>\n<h2 id=\"5e7g8\">1\u3001\u5f15\u8a00<\/h2>\n<p>\u672c\u6587\u5c06\u4ece\u57fa\u672c\u6982\u5ff5\u3001\u6280\u672f\u539f\u7406\u3001\u5e38\u89c1\u6613\u9519\u5e38\u8bc6\u3001\u52a8\u624b\u5b9e\u8df5\u7b49\u591a\u4e2a\u65b9\u9762\u5165\u624b\uff0c\u4e07\u5b57\u957f\u6587\uff0c\u5e26\u4f60\u4e00\u8d77\u5168\u65b9\u4f4d\u63a2\u7d22 WebSocket \u6280\u672f\u3002<\/p>\n<p><strong>\u9605\u8bfb\u5b8c\u672c\u6587\uff0c\u4f60\u5c06\u4e86\u89e3\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09\u4e86\u89e3 WebSocket \u7684\u8bde\u751f\u80cc\u666f\u3001WebSocket \u662f\u4ec0\u4e48\u53ca\u5b83\u7684\u4f18\u70b9\uff1b<\/li>\n<li>2\uff09\u4e86\u89e3 WebSocket \u542b\u6709\u54ea\u4e9b <span class=\"mod-overview__keyword\">API<\/span> \u53ca\u5982\u4f55\u4f7f\u7528 WebSocket API \u53d1\u9001\u666e\u901a\u6587\u672c\u548c\u4e8c\u8fdb\u5236\u6570\u636e\uff1b<\/li>\n<li>3\uff09\u4e86\u89e3 WebSocket \u7684\u63e1\u624b\u534f\u8bae\u548c\u6570\u636e\u5e27\u683c\u5f0f\u3001\u63a9\u7801\u7b97\u6cd5\u7b49\u76f8\u5173\u77e5\u8bc6\uff1b<\/li>\n<li>4\uff09\u4e86\u89e3 WebSocket \u4e0ehttp\u3001\u957f\u8f6e\u8be2\u3001socket\u7b49\u7684\u5173\u7cfb\uff0c\u7406\u6e05\u5e38\u8bc6\u6027\u7684\u7406\u89e3\u9519\u8bef\uff1b<\/li>\n<li>5\uff09\u4e86\u89e3\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u652f\u6301\u53d1\u9001\u666e\u901a\u6587\u672c\u7684 WebSocket <span class=\"mod-overview__keyword\">\u670d\u52a1\u5668<\/span>\u3002<\/li>\n<\/ul>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/a6175dbdd20cc35d9fab543bbc269917.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<h2 id=\"e2ksp\">2\u3001\u5173\u4e8e\u4f5c\u8005<\/h2>\n<p><strong>\u4f5c\u8005\u7f51\u540d\uff1a<\/strong>\u963f\u5b9d\u54e5<\/p>\n<p><strong>\u4e2a\u4eba\u535a\u5ba2\uff1a<\/strong>\u5168\u6808\u4fee\u4ed9\u4e4b\u8def<\/p>\n<p><strong>\u4f5c\u8005<\/strong><span class=\"mod-overview__keyword\"><strong>Github<\/strong><\/span><strong>\uff1a<\/strong>semlinker (\u963f\u5b9d\u54e5) \u00b7 GitHub<\/p>\n<h2 id=\"c2mlc\">3\u3001\u4ec0\u4e48\u662f WebSocket<\/h2>\n<h4 id=\"3tmc3\">3.1 WebSocket \u8bde\u751f\u80cc\u666f<\/h4>\n<p>\u65e9\u671f\uff0c\u5f88\u591a\u7f51\u7ad9\u4e3a\u4e86\u5b9e\u73b0\u63a8\u9001\u6280\u672f\uff0c\u6240\u7528\u7684\u6280\u672f\u90fd\u662f\u8f6e\u8be2\uff08\u4e5f\u53eb\u77ed\u8f6e\u8be2\uff09\u3002\u8f6e\u8be2\u662f\u6307\u7531\u6d4f\u89c8\u5668\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5411\u670d\u52a1\u5668\u53d1\u51fa HTTP \u8bf7\u6c42\uff0c\u7136\u540e\u670d\u52a1\u5668\u8fd4\u56de\u6700\u65b0\u7684\u6570\u636e\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<p><strong>\u5e38\u89c1\u7684\u8f6e\u8be2\u65b9\u5f0f\u5206\u4e3a\u8f6e\u8be2\u4e0e\u957f\u8f6e\u8be2\uff0c\u5b83\u4eec\u7684\u533a\u522b\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/a50577207ef99506edb3d73dd91cde38.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u4e3a\u4e86\u66f4\u52a0\u76f4\u89c2\u611f\u53d7\u8f6e\u8be2\u4e0e\u957f\u8f6e\u8be2\u4e4b\u95f4\u7684\u533a\u522b\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5177\u4f53\u7684\u4ee3\u7801\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/c16d7047d588322f21866a3144c84969.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u8fd9\u79cd\u4f20\u7edf\u7684\u6a21\u5f0f\u5e26\u6765\u5f88\u660e\u663e\u7684\u7f3a\u70b9\uff0c\u5373\u6d4f\u89c8\u5668\u9700\u8981\u4e0d\u65ad\u7684\u5411\u670d\u52a1\u5668\u53d1\u51fa\u8bf7\u6c42\uff0c\u7136\u800c HTTP \u8bf7\u6c42\u4e0e\u54cd\u5e94\u53ef\u80fd\u4f1a\u5305\u542b\u8f83\u957f\u7684\u5934\u90e8\uff0c\u5176\u4e2d\u771f\u6b63\u6709\u6548\u7684\u6570\u636e\u53ef\u80fd\u53ea\u662f\u5f88\u5c0f\u7684\u4e00\u90e8\u5206\uff0c\u6240\u4ee5\u8fd9\u6837\u4f1a\u6d88\u8017\u5f88\u591a\u5e26\u5bbd\u8d44\u6e90\u3002<\/p>\n<p><strong>PS\uff1a<\/strong>\u5173\u4e8e\u77ed\u8f6e\u8be2\u3001\u957f\u8f6e\u8be2\u6280\u672f\u7684\u524d\u4e16\u4eca\u8eab\uff0c\u53ef\u4ee5\u8be6\u7ec6\u8bfb\u8fd9\u4e24\u7bc7\uff1a\u300a\u65b0\u624b\u5165\u95e8\u8d34\uff1a\u53f2\u4e0a\u6700\u5168Web\u7aef\u5373\u65f6\u901a\u8baf\u6280\u672f\u539f\u7406\u8be6\u89e3\u300b\u3001\u300aWeb\u7aef\u5373\u65f6\u901a\u8baf\u6280\u672f\u76d8\u70b9\uff1a\u77ed\u8f6e\u8be2\u3001Comet\u3001Websocket\u3001SSE\u300b\u3002<\/p>\n<p>\u6bd4\u8f83\u65b0\u7684\u8f6e\u8be2\u6280\u672f\u662f\u00a0Comet\u3002\u8fd9\u79cd\u6280\u672f\u867d\u7136\u53ef\u4ee5\u5b9e\u73b0\u53cc\u5411\u901a\u4fe1\uff0c\u4f46\u4ecd\u7136\u9700\u8981\u53cd\u590d\u53d1\u51fa\u8bf7\u6c42\u3002\u800c\u4e14\u5728\u00a0Comet\u00a0\u4e2d\u666e\u904d\u91c7\u7528\u7684 HTTP \u957f\u8fde\u63a5\u4e5f\u4f1a\u6d88\u8017\u670d\u52a1\u5668\u8d44\u6e90\u3002<\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c<span class=\"mod-overview__keyword\">HTML5<\/span> \u5b9a\u4e49\u4e86 WebSocket \u534f\u8bae\uff0c\u80fd\u66f4\u597d\u7684\u8282\u7701\u670d\u52a1\u5668\u8d44\u6e90\u548c\u5e26\u5bbd\uff0c\u5e76\u4e14\u80fd\u591f\u66f4\u5b9e\u65f6\u5730\u8fdb\u884c\u901a\u8baf\u3002<\/p>\n<p>Websocket \u4f7f\u7528 ws \u6216 wss \u7684\u7edf\u4e00\u8d44\u6e90\u6807\u5fd7\u7b26\uff08URI\uff09\uff0c\u5176\u4e2d wss \u8868\u793a\u4f7f\u7528\u4e86 TLS \u7684 Websocket\u3002<\/p>\n<p><strong>\u5982\uff1a<\/strong><\/p>\n<blockquote><p>ws:\/\/echo.websocket.org wss:\/\/echo.websocket.org<\/p><\/blockquote>\n<p>WebSocket \u4e0e HTTP \u548c HTTPS \u4f7f\u7528\u76f8\u540c\u7684 <span class=\"mod-overview__keyword\">TCP<\/span> \u7aef\u53e3\uff0c\u53ef\u4ee5\u7ed5\u8fc7\u5927\u591a\u6570<span class=\"mod-overview__keyword\">\u9632\u706b\u5899<\/span>\u7684\u9650\u5236\u3002<\/p>\n<p><strong>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09WebSocket \u534f\u8bae\u4f7f\u7528 80 \u7aef\u53e3\uff1b<\/li>\n<li>2\uff09\u82e5\u8fd0\u884c\u5728 TLS \u4e4b\u4e0a\u65f6\uff0c\u9ed8\u8ba4\u4f7f\u7528 443 \u7aef\u53e3\u3002<\/li>\n<\/ul>\n<h4 id=\"1jpap\">3.2 WebSocket \u7b80\u4ecb<\/h4>\n<p>WebSocket \u662f\u4e00\u79cd\u7f51\u7edc\u4f20\u8f93\u534f\u8bae\uff0c\u53ef\u5728\u5355\u4e2a TCP \u8fde\u63a5\u4e0a\u8fdb\u884c\u5168\u53cc\u5de5\u901a\u4fe1\uff0c\u4f4d\u4e8e OSI \u6a21\u578b\u7684\u5e94\u7528\u5c42\u3002WebSocket \u534f\u8bae\u5728 2011 \u5e74\u7531 IETF \u6807\u51c6\u5316\u4e3a\u00a0<a class=\"\" href=\"https:\/\/cloud.tencent.com\/developer\/tools\/blog-entry?target=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc6455&amp;objectId=1887095&amp;objectType=1&amp;contentType=undefined\">RFC 6455<\/a>\uff0c\u540e\u7531\u00a0<a class=\"\" href=\"https:\/\/cloud.tencent.com\/developer\/tools\/blog-entry?target=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc7936&amp;objectId=1887095&amp;objectType=1&amp;contentType=undefined\">RFC 7936<\/a>\u00a0\u8865\u5145\u89c4\u8303\u3002<\/p>\n<p>WebSocket \u4f7f\u5f97\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u6570\u636e\u4ea4\u6362\u53d8\u5f97\u66f4\u52a0\u7b80\u5355\uff0c\u5141\u8bb8\u670d\u52a1\u7aef\u4e3b\u52a8\u5411\u5ba2\u6237\u7aef\u63a8\u9001\u6570\u636e\u3002\u5728 WebSocket API \u4e2d\uff0c\u6d4f\u89c8\u5668\u548c\u670d\u52a1\u5668\u53ea\u9700\u8981\u5b8c\u6210\u4e00\u6b21\u63e1\u624b\uff0c\u4e24\u8005\u4e4b\u95f4\u5c31\u53ef\u4ee5\u521b\u5efa\u6301\u4e45\u6027\u7684\u8fde\u63a5\uff0c\u5e76\u8fdb\u884c\u53cc\u5411\u6570\u636e\u4f20\u8f93\u3002<\/p>\n<p>\u4ecb\u7ecd\u5b8c\u8f6e\u8be2\u548c WebSocket \u7684\u76f8\u5173\u5185\u5bb9\u4e4b\u540e\uff0c\u63a5\u4e0b\u6765\u7528\u4e00\u5f20\u56fe\u770b\u4e00\u4e0b XHR Polling\uff08\u77ed\u8f6e\u8be2\uff09 \u4e0e WebSocket \u4e4b\u95f4\u7684\u533a\u522b\u3002<\/p>\n<p><strong>XHR Polling\u4e0e WebSocket \u4e4b\u95f4\u7684\u533a\u522b\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/ccc22f4eea2be82335a9c646f72fe61e.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<h4 id=\"cejaf\">3.3 WebSocket \u4f18\u70b9<\/h4>\n<p><strong>\u666e\u904d\u8ba4\u4e3a\uff0cWebSocket\u7684\u4f18\u70b9\u6709\u5982\u4e0b\u51e0\u70b9\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>\u8f83\u5c11\u7684\u63a7\u5236\u5f00\u9500\uff1a\u5728\u8fde\u63a5\u521b\u5efa\u540e\uff0c\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u4e4b\u95f4\u4ea4\u6362\u6570\u636e\u65f6\uff0c\u7528\u4e8e\u534f\u8bae\u63a7\u5236\u7684\u6570\u636e\u5305\u5934\u90e8\u76f8\u5bf9\u8f83\u5c0f\uff1b<\/li>\n<li><em>2\uff09<\/em>\u66f4\u5f3a\u7684\u5b9e\u65f6\u6027\uff1a\u7531\u4e8e\u534f\u8bae\u662f\u5168\u53cc\u5de5\u7684\uff0c\u6240\u4ee5\u670d\u52a1\u5668\u53ef\u4ee5\u968f\u65f6\u4e3b\u52a8\u7ed9\u5ba2\u6237\u7aef\u4e0b\u53d1\u6570\u636e\u3002\u76f8\u5bf9\u4e8e HTTP \u8bf7\u6c42\u9700\u8981\u7b49\u5f85\u5ba2\u6237\u7aef\u53d1\u8d77\u8bf7\u6c42\u670d\u52a1\u7aef\u624d\u80fd\u54cd\u5e94\uff0c\u5ef6\u8fdf\u660e\u663e\u66f4\u5c11\uff1b<\/li>\n<li><em>3\uff09<\/em>\u4fdd\u6301\u8fde\u63a5\u72b6\u6001\uff1a\u4e0e HTTP \u4e0d\u540c\u7684\u662f\uff0cWebSocket \u9700\u8981\u5148\u521b\u5efa\u8fde\u63a5\uff0c\u8fd9\u5c31\u4f7f\u5f97\u5176\u6210\u4e3a\u4e00\u79cd\u6709\u72b6\u6001\u7684\u534f\u8bae\uff0c\u4e4b\u540e\u901a\u4fe1\u65f6\u53ef\u4ee5\u7701\u7565\u90e8\u5206\u72b6\u6001\u4fe1\u606f\uff1b<\/li>\n<li><em>4\uff09<\/em>\u66f4\u597d\u7684\u4e8c\u8fdb\u5236\u652f\u6301\uff1aWebSocket \u5b9a\u4e49\u4e86\u4e8c\u8fdb\u5236\u5e27\uff0c\u76f8\u5bf9 HTTP\uff0c\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u5904\u7406\u4e8c\u8fdb\u5236\u5185\u5bb9\uff1b<\/li>\n<li><em>5\uff09<\/em>\u53ef\u4ee5\u652f\u6301\u6269\u5c55\uff1aWebSocket \u5b9a\u4e49\u4e86\u6269\u5c55\uff0c\u7528\u6237\u53ef\u4ee5\u6269\u5c55\u534f\u8bae\u3001\u5b9e\u73b0\u90e8\u5206\u81ea\u5b9a\u4e49\u7684\u5b50\u534f\u8bae\u3002<\/li>\n<\/ul>\n<p>\u7531\u4e8e WebSocket \u62e5\u6709\u4e0a\u8ff0\u7684\u4f18\u70b9\uff0c\u6240\u4ee5\u5b83\u88ab\u5e7f\u6cdb\u5730\u5e94\u7528\u5728\u5373\u65f6\u901a\u8baf\/IM\u3001<a class=\"rno-markdown__textlink-new\" href=\"https:\/\/cloud.tencent.com\/product\/trtc?from_column=20065&amp;from=20065\">\u5b9e\u65f6\u97f3\u89c6\u9891<\/a>\u3001\u5728\u7ebf\u6559\u80b2\u548c\u6e38\u620f\u7b49\u9886\u57df\u3002<\/p>\n<p>\u5bf9\u4e8e\u524d\u7aef\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u8981\u60f3\u4f7f\u7528 WebSocket \u63d0\u4f9b\u7684\u5f3a\u5927\u80fd\u529b\uff0c\u5c31\u5fc5\u987b\u5148\u638c\u63e1 WebSocket API\uff0c\u4e0b\u9762\u5e26\u5927\u5bb6\u4e00\u8d77\u6765\u8ba4\u8bc6\u4e00\u4e0b WebSocket API\u3002<\/p>\n<p><strong>PS\uff1a<\/strong>\u5982\u679c\u4f60\u60f3\u8981\u66f4\u6d45\u663e\u7684WebSocket\u5165\u95e8\u6559\u7a0b\uff0c\u53ef\u4ee5\u5148\u8bfb\u8fd9\u7bc7\u300a\u65b0\u624b\u5feb\u901f\u5165\u95e8\uff1aWebSocket\u7b80\u660e\u6559\u7a0b\u300b\u540e\uff0c\u518d\u56de\u6765\u7ee7\u7eed\u5b66\u4e60\u3002<\/p>\n<h2 id=\"25prl\">4\u3001WebSocket API \u5b66\u4e60<\/h2>\n<h4 id=\"1hqbh\">4.1 \u57fa\u672c\u60c5\u51b5<\/h4>\n<p><strong>\u5728\u4ecb\u7ecd WebSocket API \u4e4b\u524d\uff0c\u6211\u4eec\u5148\u6765\u4e86\u89e3\u4e00\u4e0b\u5b83\u7684\u517c\u5bb9\u6027\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/d277dccd786ed228b8839e3ff076da21.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\uff08\u56fe\u7247\u5f15\u7528\u81ea\uff1ahttps:\/\/caniuse.com\/#search=WebSocket\uff09<\/p>\n<p>\u7531\u4e0a\u56fe\u53ef\u77e5\uff1a\u76ee\u524d\u4e3b\u6d41\u7684 Web \u6d4f\u89c8\u5668\u90fd\u652f\u6301 WebSocket\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u5728\u5927\u591a\u6570\u9879\u76ee\u4e2d\u653e\u5fc3\u5730\u4f7f\u7528\u5b83\u3002<\/p>\n<p>\u5728\u6d4f\u89c8\u5668\u4e2d\u8981\u4f7f\u7528 WebSocket \u63d0\u4f9b\u7684\u80fd\u529b\uff0c\u6211\u4eec\u5c31\u5fc5\u987b\u5148\u521b\u5efa WebSocket \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u63d0\u4f9b\u4e86\u7528\u4e8e\u521b\u5efa\u548c\u7ba1\u7406 WebSocket \u8fde\u63a5\uff0c\u4ee5\u53ca\u53ef\u4ee5\u901a\u8fc7\u8be5\u8fde\u63a5\u53d1\u9001\u548c\u63a5\u6536\u6570\u636e\u7684 API\u3002<\/p>\n<p>\u4f7f\u7528 WebSocket \u6784\u9020\u51fd\u6570\uff0c\u6211\u4eec\u5c31\u80fd\u8f7b\u6613\u5730\u6784\u9020\u4e00\u4e2a WebSocket \u5bf9\u8c61\u3002<\/p>\n<p><strong>\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u4ece\u4ee5\u4e0b\u56db\u4e2a\u65b9\u9762\u6765\u4ecb\u7ecd WebSocket API\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09WebSocket \u6784\u9020\u51fd\u6570\uff1b<\/li>\n<li>2\uff09WebSocket \u5bf9\u8c61\u7684\u5c5e\u6027\uff1b<\/li>\n<li>3\uff09WebSocket \u7684\u65b9\u6cd5\uff1b<\/li>\n<li>4\uff09WebSocket \u4e8b\u4ef6\u3002<\/li>\n<\/ul>\n<p>\u63a5\u4e0b\u6765\u6211\u4eec\u4ece WebSocket \u7684\u6784\u9020\u51fd\u6570\u5165\u624b\u5f00\u59cb\u5b66\u4e60\u3002<\/p>\n<p><strong>PS\uff1a<\/strong>\u5982\u679c\u4f60\u60f3\u8981\u66f4\u6d45\u663e\u7684WebSocket\u5165\u95e8\u6559\u7a0b\uff0c\u53ef\u4ee5\u5148\u8bfb\u8fd9\u7bc7\u300a\u65b0\u624b\u5feb\u901f\u5165\u95e8\uff1aWebSocket\u7b80\u660e\u6559\u7a0b\u300b\u540e\uff0c\u518d\u56de\u6765\u7ee7\u7eed\u5b66\u4e60\u3002<\/p>\n<h4 id=\"cugb5\">4.2 \u6784\u9020\u51fd\u6570<\/h4>\n<p><strong>WebSocket \u6784\u9020\u51fd\u6570\u7684\u8bed\u6cd5\u4e3a\uff1a<\/strong><\/p>\n<blockquote><p>const myWebSocket = newWebSocket(url [, protocols]);<\/p><\/blockquote>\n<p><strong>\u76f8\u5173\u53c2\u6570\u8bf4\u660e\u5982\u4e0b\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>url\uff1a\u8868\u793a\u8fde\u63a5\u7684 URL\uff0c\u8fd9\u662f WebSocket \u670d\u52a1\u5668\u5c06\u54cd\u5e94\u7684 URL\uff1b<\/li>\n<li><em>2\uff09<\/em>protocols\uff08\u53ef\u9009\uff09\uff1a\u4e00\u4e2a\u534f\u8bae\u5b57\u7b26\u4e32\u6216\u8005\u4e00\u4e2a\u5305\u542b\u534f\u8bae\u5b57\u7b26\u4e32\u7684\u6570\u7ec4\u3002<\/li>\n<\/ul>\n<p><strong>\u9488\u5bf9\u7b2c2\uff09\u70b9\uff1a<\/strong>\u8fd9\u4e9b\u5b57\u7b26\u4e32\u7528\u4e8e\u6307\u5b9a\u5b50\u534f\u8bae\uff0c\u8fd9\u6837\u5355\u4e2a\u670d\u52a1\u5668\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a WebSocket \u5b50\u534f\u8bae\u3002<\/p>\n<p><strong>\u6bd4\u5982\uff1a<\/strong>\u4f60\u53ef\u80fd\u5e0c\u671b\u4e00\u53f0\u670d\u52a1\u5668\u80fd\u591f\u6839\u636e\u6307\u5b9a\u7684\u534f\u8bae\uff08protocol\uff09\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u4ea4\u4e92\u3002\u5982\u679c\u4e0d\u6307\u5b9a\u534f\u8bae\u5b57\u7b26\u4e32\uff0c\u5219\u5047\u5b9a\u4e3a\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u4f7f\u7528WebSocket \u6784\u9020\u51fd\u6570\u65f6\uff0c\u5f53\u5c1d\u8bd5\u8fde\u63a5\u7684\u7aef\u53e3\u88ab\u963b\u6b62\u65f6\uff0c\u4f1a\u629b\u51fa\u00a0<em>SECURITY_ERR<\/em>\u00a0\u5f02\u5e38\u3002<\/p>\n<p><strong>PS\uff1a<\/strong>\u6709\u5173WebSocket\u6784\u9020\u51fd\u6570\u7684\u66f4\u8be6\u7ec6\u8bf4\u660e\uff0c\u53ef\u4ee5\u53c2\u89c1\u5b98\u65b9API\u6587\u6863\u3002<\/p>\n<h4 id=\"jrbl\">4.3 \u5c5e\u6027<\/h4>\n<p><strong>WebSocket \u5bf9\u8c61\u5305\u542b\u4ee5\u4e0b\u5c5e\u6027\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/1a5b28ece499ec52b4d6de02742b9084.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u6bcf\u4e2a\u5c5e\u6027\u7684\u5177\u4f53\u542b\u4e49\u5982\u4e0b\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>binaryType\uff1a\u4f7f\u7528\u4e8c\u8fdb\u5236\u7684\u6570\u636e\u7c7b\u578b\u8fde\u63a5\uff1b<\/li>\n<li><em>2\uff09<\/em>bufferedAmount\uff08\u53ea\u8bfb\uff09\uff1a\u672a\u53d1\u9001\u81f3\u670d\u52a1\u5668\u7684\u5b57\u8282\u6570\uff1b<\/li>\n<li><em>3\uff09<\/em>extensions\uff08\u53ea\u8bfb\uff09\uff1a\u670d\u52a1\u5668\u9009\u62e9\u7684\u6269\u5c55\uff1b<\/li>\n<li><em>4\uff09<\/em>onclose\uff1a\u7528\u4e8e\u6307\u5b9a\u8fde\u63a5\u5173\u95ed\u540e\u7684\u56de\u8c03\u51fd\u6570\uff1b<\/li>\n<li><em>5\uff09<\/em>onerror\uff1a\u7528\u4e8e\u6307\u5b9a\u8fde\u63a5\u5931\u8d25\u540e\u7684\u56de\u8c03\u51fd\u6570\uff1b<\/li>\n<li><em>6\uff09<\/em>onmessage\uff1a\u7528\u4e8e\u6307\u5b9a\u5f53\u4ece\u670d\u52a1\u5668\u63a5\u53d7\u5230\u4fe1\u606f\u65f6\u7684\u56de\u8c03\u51fd\u6570\uff1b<\/li>\n<li><em>7\uff09<\/em>onopen\uff1a\u7528\u4e8e\u6307\u5b9a\u8fde\u63a5\u6210\u529f\u540e\u7684\u56de\u8c03\u51fd\u6570\uff1b<\/li>\n<li><em>8\uff09<\/em>protocol\uff08\u53ea\u8bfb\uff09\uff1a\u7528\u4e8e\u8fd4\u56de\u670d\u52a1\u5668\u7aef\u9009\u4e2d\u7684\u5b50\u534f\u8bae\u7684\u540d\u5b57\uff1b<\/li>\n<li><em>9\uff09<\/em>readyState\uff08\u53ea\u8bfb\uff09\uff1a\u8fd4\u56de\u5f53\u524d WebSocket \u7684\u8fde\u63a5\u72b6\u6001\uff0c\u5171\u6709 4 \u79cd\u72b6\u6001\uff1a<\/li>\n<li>\u00a0 \u00a0 &#8211;\u00a0<em>CONNECTING \u2014 \u6b63\u5728\u8fde\u63a5\u4e2d\uff0c\u5bf9\u5e94\u7684\u503c\u4e3a 0\uff1b<\/em><\/li>\n<li>\u00a0 \u00a0 &#8211;\u00a0<em>OPEN \u2014 \u5df2\u7ecf\u8fde\u63a5\u5e76\u4e14\u53ef\u4ee5\u901a\u8baf\uff0c\u5bf9\u5e94\u7684\u503c\u4e3a 1\uff1b<\/em><\/li>\n<li>\u00a0 \u00a0 &#8211;\u00a0<em>CLOSING \u2014 \u8fde\u63a5\u6b63\u5728\u5173\u95ed\uff0c\u5bf9\u5e94\u7684\u503c\u4e3a 2\uff1b<\/em><\/li>\n<li>\u00a0 \u00a0 &#8211;\u00a0<em>CLOSED \u2014 \u8fde\u63a5\u5df2\u5173\u95ed\u6216\u8005\u6ca1\u6709\u8fde\u63a5\u6210\u529f\uff0c\u5bf9\u5e94\u7684\u503c\u4e3a 3<\/em><\/li>\n<li><em>10\uff09<\/em>url\uff08\u53ea\u8bfb\uff09\uff1a\u8fd4\u56de\u503c\u4e3a\u5f53\u6784\u9020\u51fd\u6570\u521b\u5efa WebSocket \u5b9e\u4f8b\u5bf9\u8c61\u65f6 URL \u7684\u7edd\u5bf9\u8def\u5f84\u3002<\/li>\n<\/ul>\n<h4 id=\"efaid\">4.4 \u65b9\u6cd5<\/h4>\n<p><strong>WebSocket \u4e3b\u8981\u65b9\u6cd5\u6709\u4e24\u4e2a\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>close([code[, reason]])\uff1a\u8be5\u65b9\u6cd5\u7528\u4e8e\u5173\u95ed WebSocket \u8fde\u63a5\uff0c\u5982\u679c\u8fde\u63a5\u5df2\u7ecf\u5173\u95ed\uff0c\u5219\u6b64\u65b9\u6cd5\u4e0d\u6267\u884c\u4efb\u4f55\u64cd\u4f5c\uff1b<\/li>\n<li><em>2\uff09<\/em>send(data)\uff1a\u8be5\u65b9\u6cd5\u5c06\u9700\u8981\u901a\u8fc7 WebSocket \u94fe\u63a5\u4f20\u8f93\u81f3\u670d\u52a1\u5668\u7684\u6570\u636e\u6392\u5165\u961f\u5217\uff0c\u5e76\u6839\u636e\u6240\u9700\u8981\u4f20\u8f93\u7684\u6570\u636e\u7684\u5927\u5c0f\u6765\u589e\u52a0 bufferedAmount \u7684\u503c \u3002\u82e5\u6570\u636e\u65e0\u6cd5\u4f20\u8f93\uff08\u6bd4\u5982\u6570\u636e\u9700\u8981\u7f13\u5b58\u800c\u7f13\u51b2\u533a\u5df2\u6ee1\uff09\u65f6\uff0c\u5957\u63a5\u5b57\u4f1a\u81ea\u884c\u5173\u95ed\u3002<\/li>\n<\/ul>\n<h4 id=\"ar65n\">4.5 \u4e8b\u4ef6<\/h4>\n<p>\u4f7f\u7528 addEventListener() \u6216\u5c06\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\u8d4b\u503c\u7ed9 WebSocket \u5bf9\u8c61\u7684 oneventname \u5c5e\u6027\uff0c\u6765\u76d1\u542c\u4e0b\u9762\u7684\u4e8b\u4ef6\u3002<\/p>\n<p><strong>\u4ee5\u4e0b\u662f\u51e0\u4e2a\u4e8b\u4ef6\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>close\uff1a\u5f53\u4e00\u4e2a WebSocket \u8fde\u63a5\u88ab\u5173\u95ed\u65f6\u89e6\u53d1\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 onclose \u5c5e\u6027\u6765\u8bbe\u7f6e\uff1b<\/li>\n<li><em>2\uff09<\/em>error\uff1a\u5f53\u4e00\u4e2a WebSocket \u8fde\u63a5\u56e0\u9519\u8bef\u800c\u5173\u95ed\u65f6\u89e6\u53d1\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 onerror \u5c5e\u6027\u6765\u8bbe\u7f6e\uff1b<\/li>\n<li><em>3\uff09<\/em>message\uff1a\u5f53\u901a\u8fc7 WebSocket \u6536\u5230\u6570\u636e\u65f6\u89e6\u53d1\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 onmessage \u5c5e\u6027\u6765\u8bbe\u7f6e\uff1b<\/li>\n<li><em>4\uff09<\/em>open\uff1a\u5f53\u4e00\u4e2a WebSocket \u8fde\u63a5\u6210\u529f\u65f6\u89e6\u53d1\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 onopen \u5c5e\u6027\u6765\u8bbe\u7f6e\u3002<\/li>\n<\/ul>\n<p>\u4ecb\u7ecd\u5b8c WebSocket API\uff0c\u6211\u4eec\u6765\u4e3e\u4e00\u4e2a\u4f7f\u7528 WebSocket \u53d1\u9001\u666e\u901a\u6587\u672c\u7684\u793a\u4f8b\u3002<\/p>\n<h4 id=\"9c083\">4.6 \u4ee3\u7801\u5b9e\u8df5\uff1a\u53d1\u9001\u666e\u901a\u6587\u672c<\/h4>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/c18b1e662e1eed2afcd04b3590dc04a9.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u5728\u4ee5\u4e0a\u793a\u4f8b\u4e2d\uff1a<\/strong>\u6211\u4eec\u5728\u9875\u9762\u4e0a\u521b\u5efa\u4e86\u4e24\u4e2a textarea\uff0c\u5206\u522b\u7528\u4e8e\u5b58\u653e\u00a0\u5f85\u53d1\u9001\u7684\u6570\u636e\u00a0\u548c\u00a0\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u3002\u5f53\u7528\u6237\u8f93\u5165\u5b8c\u5f85\u53d1\u9001\u7684\u6587\u672c\u4e4b\u540e\uff0c\u70b9\u51fb\u00a0\u53d1\u9001\u00a0\u6309\u94ae\u65f6\u4f1a\u628a\u8f93\u5165\u7684\u6587\u672c\u53d1\u9001\u5230\u670d\u52a1\u7aef\uff0c\u800c\u670d\u52a1\u7aef\u6210\u529f\u63a5\u6536\u5230\u6d88\u606f\u4e4b\u540e\uff0c\u4f1a\u628a\u6536\u5230\u7684\u6d88\u606f\u539f\u5c01\u4e0d\u52a8\u5730\u56de\u4f20\u5230\u5ba2\u6237\u7aef\u3002<\/p>\n<blockquote><p>\/\/ const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); \/\/ const sendMsgContainer = document.querySelector(&#8220;#sendMessage&#8221;); function send() { \u00a0\u00a0const message = sendMsgContainer.value; \u00a0\u00a0if(socket.readyState !== WebSocket.OPEN) { \u00a0\u00a0\u00a0\u00a0console.log(&#8220;\u8fde\u63a5\u672a\u5efa\u7acb\uff0c\u8fd8\u4e0d\u80fd\u53d1\u9001\u6d88\u606f&#8221;); \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0if(message) socket.send(message); }<\/p><\/blockquote>\n<p>\u5f53\u7136\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u670d\u52a1\u7aef\u8fd4\u56de\u7684\u6d88\u606f\u4e4b\u540e\uff0c\u4f1a\u628a\u5bf9\u5e94\u7684\u6587\u672c\u5185\u5bb9\u4fdd\u5b58\u5230\u00a0\u63a5\u6536\u7684\u6570\u636e\u00a0\u5bf9\u5e94\u7684 textarea \u6587\u672c\u6846\u4e2d\u3002<\/p>\n<blockquote><p>\/\/ const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); \/\/ const receivedMsgContainer = document.querySelector(&#8220;#receivedMessage&#8221;);\u00a0\u00a0\u00a0 socket.addEventListener(&#8220;message&#8221;, function(event) { \u00a0\u00a0console.log(&#8220;Message from server &#8220;, event.data); \u00a0\u00a0receivedMsgContainer.value = event.data; });<\/p><\/blockquote>\n<p>\u4e3a\u4e86\u66f4\u52a0\u76f4\u89c2\u5730\u7406\u89e3\u4e0a\u8ff0\u7684\u6570\u636e\u4ea4\u4e92\u8fc7\u7a0b\uff0c\u6211\u4eec\u4f7f\u7528 Chrome \u6d4f\u89c8\u5668\u7684<a class=\"rno-markdown__textlink-new\" href=\"https:\/\/cloud.tencent.com\/product\/coding?from_column=20065&amp;from=20065\">\u5f00\u53d1\u8005\u5de5\u5177<\/a>\u6765\u770b\u4e00\u4e0b\u76f8\u5e94\u7684\u8fc7\u7a0b\u3002<\/p>\n<p><strong>\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/bb0cd0c781b92f9e1232e1a3d9b6b9d7.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u4ee5\u4e0a\u793a\u4f8b\u5bf9\u5e94\u7684\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/strong><\/p>\n<blockquote><p>&lt;!DOCTYPE html&gt; &lt;html&gt; \u00a0\u00a0&lt;head&gt; \u00a0\u00a0\u00a0\u00a0&lt;metacharset=&#8221;UTF-8&#8243;\/&gt; \u00a0\u00a0\u00a0\u00a0&lt;metaname=&#8221;viewport&#8221;content=&#8221;width=device-width, initial-scale=1.0&#8243;\/&gt; \u00a0\u00a0\u00a0\u00a0&lt;title&gt;WebSocket \u53d1\u9001\u666e\u901a\u6587\u672c\u793a\u4f8b&lt;\/title&gt; \u00a0\u00a0\u00a0\u00a0&lt;style&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.block { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0flex: 1; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0&lt;\/style&gt; \u00a0\u00a0&lt;\/head&gt; \u00a0\u00a0&lt;body&gt; \u00a0\u00a0\u00a0\u00a0&lt;h3&gt;WebSocket \u53d1\u9001\u666e\u901a\u6587\u672c\u793a\u4f8b&lt;\/h3&gt; \u00a0\u00a0\u00a0\u00a0&lt;divstyle=&#8221;display: flex;&#8221;&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;divclass=&#8221;block&#8221;&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;\u5373\u5c06\u53d1\u9001\u7684\u6570\u636e\uff1a&lt;button&gt;\u53d1\u9001&lt;\/button&gt;&lt;\/p&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;textareaid=&#8221;sendMessage&#8221;rows=&#8221;5&#8243;cols=&#8221;15&#8243;&gt;&lt;\/textarea&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;\/div&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;divclass=&#8221;block&#8221;&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;\u63a5\u6536\u7684\u6570\u636e\uff1a&lt;\/p&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;textareaid=&#8221;receivedMessage&#8221;rows=&#8221;5&#8243;cols=&#8221;15&#8243;&gt;&lt;\/textarea&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;\/div&gt; \u00a0\u00a0\u00a0\u00a0&lt;\/div&gt; \u00a0\u00a0\u00a0\u00a0&lt;script&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const sendMsgContainer = document.querySelector(&#8220;#sendMessage&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const receivedMsgContainer = document.querySelector(&#8220;#receivedMessage&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u76d1\u542c\u8fde\u63a5\u6210\u529f\u4e8b\u4ef6 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0socket.addEventListener(&#8220;open&#8221;, function (event) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;\u8fde\u63a5\u6210\u529f\uff0c\u53ef\u4ee5\u5f00\u59cb\u901a\u8baf&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u76d1\u542c\u6d88\u606f \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0socket.addEventListener(&#8220;message&#8221;, function (event) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;Message from server &#8220;, event.data); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0receivedMsgContainer.value = event.data; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0function send() { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const message = sendMsgContainer.value; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (socket.readyState !== WebSocket.OPEN) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;\u8fde\u63a5\u672a\u5efa\u7acb\uff0c\u8fd8\u4e0d\u80fd\u53d1\u9001\u6d88\u606f&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (message) socket.send(message); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0&lt;\/script&gt; \u00a0\u00a0&lt;\/body&gt; &lt;\/html&gt;<\/p><\/blockquote>\n<p>\u5176\u5b9e WebSocket \u9664\u4e86\u652f\u6301\u53d1\u9001\u666e\u901a\u7684\u6587\u672c\u4e4b\u5916\uff0c\u5b83\u8fd8\u652f\u6301\u53d1\u9001\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u6bd4\u5982 ArrayBuffer \u5bf9\u8c61\u3001Blob \u5bf9\u8c61\u6216\u8005 ArrayBufferView \u5bf9\u8c61\u3002<\/p>\n<p><strong>\u4ee3\u7801\u793a\u4f8b\u5982\u4e0b\uff1a<\/strong><\/p>\n<blockquote><p>const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); socket.onopen = function() { \u00a0\u00a0\/\/ \u53d1\u9001UTF-8\u7f16\u7801\u7684\u6587\u672c\u4fe1\u606f \u00a0\u00a0socket.send(&#8220;Hello Echo Server!&#8221;); \u00a0\u00a0\/\/ \u53d1\u9001UTF-8\u7f16\u7801\u7684<span class=\"mod-overview__keyword\">JSON<\/span>\u6570\u636e \u00a0\u00a0socket.send(JSON.stringify({ msg: &#8220;\u6211\u662f\u963f\u5b9d\u54e5&#8221;})); \u00a0\u00a0\/\/ \u53d1\u9001\u4e8c\u8fdb\u5236ArrayBuffer \u00a0\u00a0const buffer = newArrayBuffer(128); \u00a0\u00a0socket.send(buffer); \u00a0\u00a0\/\/ \u53d1\u9001\u4e8c\u8fdb\u5236ArrayBufferView \u00a0\u00a0const intview = new Uint32Array(buffer); \u00a0\u00a0socket.send(intview); \u00a0\u00a0\/\/ \u53d1\u9001\u4e8c\u8fdb\u5236Blob \u00a0\u00a0const blob = new Blob([buffer]); \u00a0\u00a0socket.send(blob); };<\/p><\/blockquote>\n<p>\u4ee5\u4e0a\u4ee3\u7801\u6210\u529f\u8fd0\u884c\u540e\uff0c\u901a\u8fc7 Chrome \u5f00\u53d1\u8005\u5de5\u5177\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5bf9\u5e94\u7684\u6570\u636e\u4ea4\u4e92\u8fc7\u7a0b\u3002<\/p>\n<p><strong>\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/e971bd9c3874896b00e609f2c0aec56f.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u4e0b\u9762\u4ee5\u53d1\u9001 Blob \u5bf9\u8c61\u4e3a\u4f8b\uff0c\u6765\u4ecb\u7ecd\u4e00\u4e0b\u5982\u4f55\u53d1\u9001\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/p>\n<p>Blob\uff08Binary Large Object\uff09\u8868\u793a\u4e8c\u8fdb\u5236\u7c7b\u578b\u7684\u5927\u5bf9\u8c61\u3002\u5728<a class=\"rno-markdown__textlink-new\" href=\"https:\/\/cloud.tencent.com\/product\/dmc?from_column=20065&amp;from=20065\">\u6570\u636e\u5e93\u7ba1\u7406<\/a>\u7cfb\u7edf\u4e2d\uff0c\u5c06\u4e8c\u8fdb\u5236<span class=\"mod-overview__keyword\">\u6570\u636e\u5b58\u50a8<\/span>\u4e3a\u4e00\u4e2a\u5355\u4e00\u4e2a\u4f53\u7684\u96c6\u5408\u3002Blob \u901a\u5e38\u662f\u5f71\u50cf\u3001\u58f0\u97f3\u6216\u591a\u5a92\u4f53\u6587\u4ef6\u3002\u5728 JavaScript \u4e2d Blob \u7c7b\u578b\u7684\u5bf9\u8c61\u8868\u793a\u4e0d\u53ef\u53d8\u7684\u7c7b\u4f3c\u6587\u4ef6\u5bf9\u8c61\u7684\u539f\u59cb\u6570\u636e\u3002<\/p>\n<p>\u5bf9 Blob \u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\uff0c\u53ef\u4ee5\u9605\u8bfb \u300a\u4f60\u4e0d\u77e5\u9053\u7684 Blob\u300b\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n<h4 id=\"5go25\">4.7 \u4ee3\u7801\u5b9e\u8df5\uff1a\u53d1\u9001\u4e8c\u8fdb\u5236\u6570\u636e<\/h4>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/5900975dc529ddc7686889e656bc37c1.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u5728\u4ee5\u4e0a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5728\u9875\u9762\u4e0a\u521b\u5efa\u4e86\u4e24\u4e2a textarea\uff0c\u5206\u522b\u7528\u4e8e\u5b58\u653e\u00a0\u5f85\u53d1\u9001\u7684\u6570\u636e\u00a0\u548c\u00a0\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u3002<\/p>\n<p>\u5f53\u7528\u6237\u8f93\u5165\u5b8c\u5f85\u53d1\u9001\u7684\u6587\u672c\u4e4b\u540e\uff0c\u70b9\u51fb\u00a0\u53d1\u9001\u00a0\u6309\u94ae\u65f6\uff0c\u6211\u4eec\u4f1a\u5148\u83b7\u53d6\u8f93\u5165\u7684\u6587\u672c\u5e76\u628a\u6587\u672c\u5305\u88c5\u6210\u00a0Blob\u00a0\u5bf9\u8c61\u7136\u540e\u53d1\u9001\u5230\u670d\u52a1\u7aef\uff0c\u800c\u670d\u52a1\u7aef\u6210\u529f\u63a5\u6536\u5230\u6d88\u606f\u4e4b\u540e\uff0c\u4f1a\u628a\u6536\u5230\u7684\u6d88\u606f\u539f\u5c01\u4e0d\u52a8\u5730\u56de\u4f20\u5230\u5ba2\u6237\u7aef\u3002<\/p>\n<p>\u5f53\u6d4f\u89c8\u5668\u63a5\u6536\u5230\u65b0\u6d88\u606f\u540e\uff0c\u5982\u679c\u662f\u6587\u672c\u6570\u636e\uff0c\u4f1a\u81ea\u52a8\u5c06\u5176\u8f6c\u6362\u6210\u00a0DOMString\u00a0\u5bf9\u8c61\uff0c\u5982\u679c\u662f\u4e8c\u8fdb\u5236\u6570\u636e\u6216\u00a0Blob\u00a0\u5bf9\u8c61\uff0c\u4f1a\u76f4\u63a5\u5c06\u5176\u8f6c\u4ea4\u7ed9\u5e94\u7528\uff0c\u7531\u5e94\u7528\u81ea\u8eab\u6765\u6839\u636e\u8fd4\u56de\u7684\u6570\u636e\u7c7b\u578b\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002<\/p>\n<p><strong>\u6570\u636e\u53d1\u9001\u4ee3\u7801\uff1a<\/strong><\/p>\n<blockquote><p>\/\/ const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); \/\/ const sendMsgContainer = document.querySelector(&#8220;#sendMessage&#8221;); function send() { \u00a0\u00a0const message = sendMsgContainer.value; \u00a0\u00a0if(socket.readyState !== WebSocket.OPEN) { \u00a0\u00a0\u00a0\u00a0console.log(&#8220;\u8fde\u63a5\u672a\u5efa\u7acb\uff0c\u8fd8\u4e0d\u80fd\u53d1\u9001\u6d88\u606f&#8221;); \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0const blob = newBlob([message], { type: &#8220;text\/plain&#8221;}); \u00a0\u00a0if(message) socket.send(blob); \u00a0\u00a0console.log(`\u672a\u53d1\u9001\u81f3\u670d\u52a1\u5668\u7684\u5b57\u8282\u6570\uff1a${socket.bufferedAmount}`); }<\/p><\/blockquote>\n<p>\u5f53\u5ba2\u6237\u7aef\u63a5\u6536\u5230\u670d\u52a1\u7aef\u8fd4\u56de\u7684\u6d88\u606f\u4e4b\u540e\uff0c\u4f1a\u5224\u65ad\u8fd4\u56de\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5982\u679c\u662f Blob \u7c7b\u578b\u7684\u8bdd\uff0c\u4f1a\u8c03\u7528 Blob \u5bf9\u8c61\u7684 text() \u65b9\u6cd5\uff0c\u83b7\u53d6 Blob \u5bf9\u8c61\u4e2d\u4fdd\u5b58\u7684 UTF-8 \u683c\u5f0f\u7684\u5185\u5bb9\uff0c\u7136\u540e\u628a\u5bf9\u5e94\u7684\u6587\u672c\u5185\u5bb9\u4fdd\u5b58\u5230\u00a0\u63a5\u6536\u7684\u6570\u636e\u00a0\u5bf9\u5e94\u7684 textarea \u6587\u672c\u6846\u4e2d\u3002<\/p>\n<p><strong>\u6570\u636e\u63a5\u6536\u4ee3\u7801\uff1a<\/strong><\/p>\n<blockquote><p>\/\/ const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); \/\/ const receivedMsgContainer = document.querySelector(&#8220;#receivedMessage&#8221;); socket.addEventListener(&#8220;message&#8221;, async function(event) { \u00a0\u00a0console.log(&#8220;Message from server &#8220;, event.data); \u00a0\u00a0const receivedData = event.data; \u00a0\u00a0if(receivedData instanceofBlob) { \u00a0\u00a0\u00a0\u00a0receivedMsgContainer.value = await receivedData.text(); \u00a0\u00a0} else{ \u00a0\u00a0\u00a0\u00a0receivedMsgContainer.value = receivedData; \u00a0\u00a0} \u00a0});<\/p><\/blockquote>\n<p>\u540c\u6837\uff0c\u6211\u4eec\u4f7f\u7528 Chrome \u6d4f\u89c8\u5668\u7684\u5f00\u53d1\u8005\u5de5\u5177\u6765\u770b\u4e00\u4e0b\u76f8\u5e94\u7684\u8fc7\u7a0b\uff1a<\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/8a0c10c2f6733faeb589def1716446ec.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u901a\u8fc7\u4e0a\u56fe\u6211\u4eec\u53ef\u4ee5\u5f88\u660e\u663e\u5730\u770b\u5230\uff0c\u5f53\u4f7f\u7528\u53d1\u9001 Blob \u5bf9\u8c61\u65f6\uff0cData \u680f\u4f4d\u7684\u4fe1\u606f\u663e\u793a\u7684\u662f\u00a0Binary Message\uff0c\u800c\u5bf9\u4e8e\u53d1\u9001\u666e\u901a\u6587\u672c\u6765\u8bf4\uff0cData \u680f\u4f4d\u7684\u4fe1\u606f\u662f\u76f4\u63a5\u663e\u793a\u53d1\u9001\u7684\u6587\u672c\u6d88\u606f\u3002<\/p>\n<p><strong>\u4ee5\u4e0a\u793a\u4f8b\u5bf9\u5e94\u7684\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/strong><\/p>\n<blockquote><p>&lt;!DOCTYPE html&gt; &lt;html&gt; \u00a0\u00a0&lt;head&gt; \u00a0\u00a0\u00a0\u00a0&lt;meta charset=&#8221;UTF-8&#8243;\/&gt; \u00a0\u00a0\u00a0\u00a0&lt;meta name=&#8221;viewport&#8221;content=&#8221;width=device-width, initial-scale=1.0&#8243;\/&gt; \u00a0\u00a0\u00a0\u00a0&lt;title&gt;WebSocket \u53d1\u9001\u4e8c\u8fdb\u5236\u6570\u636e\u793a\u4f8b&lt;\/title&gt; \u00a0\u00a0\u00a0\u00a0&lt;style&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.block { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0flex: 1; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0&lt;\/style&gt; \u00a0\u00a0&lt;\/head&gt; \u00a0\u00a0&lt;body&gt; \u00a0\u00a0\u00a0\u00a0&lt;h3&gt;WebSocket \u53d1\u9001\u4e8c\u8fdb\u5236\u6570\u636e\u793a\u4f8b&lt;\/h3&gt; \u00a0\u00a0\u00a0\u00a0&lt;div style=&#8221;display: flex;&#8221;&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;div class=&#8221;block&#8221;&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;\u5f85\u53d1\u9001\u7684\u6570\u636e\uff1a&lt;button&gt;\u53d1\u9001&lt;\/button&gt;&lt;\/p&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;textarea id=&#8221;sendMessage&#8221;rows=&#8221;5&#8243;cols=&#8221;15&#8243;&gt;&lt;\/textarea&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;\/div&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;div class=&#8221;block&#8221;&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;p&gt;\u63a5\u6536\u7684\u6570\u636e\uff1a&lt;\/p&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;textarea id=&#8221;receivedMessage&#8221;rows=&#8221;5&#8243;cols=&#8221;15&#8243;&gt;&lt;\/textarea&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0&lt;\/div&gt; \u00a0\u00a0\u00a0\u00a0&lt;\/div&gt; \u00a0\u00a0\u00a0\u00a0&lt;script&gt; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const sendMsgContainer = document.querySelector(&#8220;#sendMessage&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const receivedMsgContainer = document.querySelector(&#8220;#receivedMessage&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const socket = new WebSocket(&#8220;ws:\/\/echo.websocket.org&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u76d1\u542c\u8fde\u63a5\u6210\u529f\u4e8b\u4ef6 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0socket.addEventListener(&#8220;open&#8221;, function(event) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;\u8fde\u63a5\u6210\u529f\uff0c\u53ef\u4ee5\u5f00\u59cb\u901a\u8baf&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u76d1\u542c\u6d88\u606f \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0socket.addEventListener(&#8220;message&#8221;, async function(event) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;Message from server &#8220;, event.data); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const receivedData = event.data; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(receivedData instanceofBlob) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0receivedMsgContainer.value = await receivedData.text(); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} else{ \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0receivedMsgContainer.value = receivedData; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0functionsend() { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const message = sendMsgContainer.value; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(socket.readyState !== WebSocket.OPEN) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;\u8fde\u63a5\u672a\u5efa\u7acb\uff0c\u8fd8\u4e0d\u80fd\u53d1\u9001\u6d88\u606f&#8221;); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const blob = newBlob([message], { type: &#8220;text\/plain&#8221;}); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if(message) socket.send(blob); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(`\u672a\u53d1\u9001\u81f3\u670d\u52a1\u5668\u7684\u5b57\u8282\u6570\uff1a${socket.bufferedAmount}`); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0&lt;\/script&gt; \u00a0\u00a0&lt;\/body&gt; &lt;\/html&gt;<\/p><\/blockquote>\n<p>\u53ef\u80fd\u6709\u4e00\u4e9b\u5c0f\u4f19\u4f34\u4e86\u89e3\u5b8c WebSocket API \u4e4b\u540e\uff0c\u89c9\u5f97\u8fd8\u4e0d\u591f\u8fc7\u763e\u3002\u4e0b\u9762\u5c06\u5e26\u5927\u5bb6\u6765\u5b9e\u73b0\u4e00\u4e2a\u652f\u6301\u53d1\u9001\u666e\u901a\u6587\u672c\u7684 WebSocket \u670d\u52a1\u5668\u3002<\/p>\n<h2 id=\"3opb\">5\u3001\u624b\u5199 WebSocket \u670d\u52a1\u5668<\/h2>\n<h4 id=\"bu114\">5.1 \u5199\u5728\u524d\u9762<\/h4>\n<p>\u5728\u4ecb\u7ecd\u5982\u4f55\u624b\u5199 WebSocket \u670d\u52a1\u5668\u524d\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u4e00\u4e0b WebSocket \u8fde\u63a5\u7684\u751f\u547d\u5468\u671f\u3002<\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/a10d7c36061210656b034359c65ad5b1.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u4ece\u4e0a\u56fe\u53ef\u77e5\uff1a\u5728\u4f7f\u7528 WebSocket \u5b9e\u73b0\u5168\u53cc\u5de5\u901a\u4fe1\u4e4b\u524d\uff0c\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u9700\u8981\u5148\u8fdb\u884c\u63e1\u624b\uff08Handshake\uff09\uff0c\u5728\u5b8c\u6210\u63e1\u624b\u4e4b\u540e\u624d\u80fd\u5f00\u59cb\u8fdb\u884c\u6570\u636e\u7684\u53cc\u5411\u901a\u4fe1\u3002<\/p>\n<p>\u63e1\u624b\u662f\u5728\u901a\u4fe1\u7535\u8def\u521b\u5efa\u4e4b\u540e\uff0c\u4fe1\u606f\u4f20\u8f93\u5f00\u59cb\u4e4b\u524d\u3002<\/p>\n<p><strong>\u63e1\u624b\u7528\u4e8e\u8fbe\u6210\u53c2\u6570\uff0c\u5982\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09\u4fe1\u606f\u4f20\u8f93\u7387<\/li>\n<li>2\uff09\u5b57\u6bcd\u8868<\/li>\n<li>3\uff09\u5947\u5076\u6821\u9a8c<\/li>\n<li>4\uff09\u4e2d\u65ad\u8fc7\u7a0b\uff1b<\/li>\n<li>5\uff09\u5176\u4ed6\u534f\u8bae\u7279\u6027\u3002<\/li>\n<\/ul>\n<p>\u63e1\u624b\u6709\u52a9\u4e8e\u4e0d\u540c\u7ed3\u6784\u7684\u7cfb\u7edf\u6216\u8bbe\u5907\u5728\u901a\u4fe1\u4fe1\u9053\u4e2d\u8fde\u63a5\uff0c\u800c\u4e0d\u9700\u8981\u4eba\u4e3a\u8bbe\u7f6e\u53c2\u6570\u3002<\/p>\n<p>\u65e2\u7136\u63e1\u624b\u662f WebSocket \u8fde\u63a5\u751f\u547d\u5468\u671f\u7684\u7b2c\u4e00\u4e2a\u73af\u8282\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u5148\u6765\u5206\u6790 WebSocket \u7684\u63e1\u624b\u534f\u8bae\u3002<\/p>\n<h4 id=\"2s6ro\">5.2 \u63e1\u624b\u534f\u8bae<\/h4>\n<p>WebSocket \u534f\u8bae\u5c5e\u4e8e\u5e94\u7528\u5c42\u534f\u8bae\uff0c\u5b83\u4f9d\u8d56\u4e8e\u4f20\u8f93\u5c42\u7684 TCP \u534f\u8bae\u3002WebSocket \u901a\u8fc7 HTTP\/1.1 \u534f\u8bae\u7684 101 \u72b6\u6001\u7801\u8fdb\u884c\u63e1\u624b\u3002\u4e3a\u4e86\u521b\u5efa WebSocket \u8fde\u63a5\uff0c\u9700\u8981\u901a\u8fc7\u6d4f\u89c8\u5668\u53d1\u51fa\u8bf7\u6c42\uff0c\u4e4b\u540e\u670d\u52a1\u5668\u8fdb\u884c\u56de\u5e94\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u901a\u5e38\u79f0\u4e3a \u201c\u63e1\u624b\u201d\uff08Handshaking\uff09\u3002<\/p>\n<p><strong>\u5229\u7528 HTTP \u5b8c\u6210\u63e1\u624b\u6709\u51e0\u4e2a\u597d\u5904\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>\u9996\u5148\uff1a\u8ba9 WebSocket \u4e0e\u73b0\u6709 HTTP \u57fa\u7840\u8bbe\u65bd\u517c\u5bb9\u2014\u2014\u4f7f\u5f97 WebSocket \u670d\u52a1\u5668\u53ef\u4ee5\u8fd0\u884c\u5728 80 \u548c 443 \u7aef\u53e3\u4e0a\uff0c\u8fd9\u901a\u5e38\u662f\u5bf9\u5ba2\u6237\u7aef\u552f\u4e00\u5f00\u653e\u7684\u7aef\u53e3\uff1b<\/li>\n<li><em>2\uff09<\/em>\u5176\u6b21\uff1a\u8ba9\u6211\u4eec\u53ef\u4ee5\u91cd\u7528\u5e76\u6269\u5c55 HTTP \u7684 Upgrade \u6d41\uff0c\u4e3a\u5176\u6dfb\u52a0\u81ea\u5b9a\u4e49\u7684 WebSocket \u9996\u90e8\uff0c\u4ee5\u5b8c\u6210\u534f\u5546\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u6211\u4eec\u4ee5\u524d\u9762\u5df2\u7ecf\u6f14\u793a\u8fc7\u7684\u53d1\u9001\u666e\u901a\u6587\u672c\u7684\u4f8b\u5b50\u4e3a\u4f8b\uff0c\u6765\u5177\u4f53\u5206\u6790\u4e00\u4e0b\u63e1\u624b\u8fc7\u7a0b\u3002<\/p>\n<p><strong><em>5.2.1\uff09\u5ba2\u6237\u7aef\u8bf7\u6c42\uff1a<\/em><\/strong><\/p>\n<blockquote><p>GET ws:\/\/echo.websocket.org\/ HTTP\/1.1 Host: echo.websocket.org Origin: file:\/\/ Connection: Upgrade Upgrade: websocket Sec-WebSocket-Version: 13 Sec-WebSocket-Key: Zx8rNEkBE4xnwifpuh8DHQ== Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits<\/p><\/blockquote>\n<p><strong>\u5907\u6ce8\uff1a<\/strong>\u5df2\u5ffd\u7565\u90e8\u5206 HTTP \u8bf7\u6c42\u5934\u3002<\/p>\n<p><strong>\u9488\u5bf9\u4e0a\u8ff0\u8bf7\u6c42\u4e2d\u7684\u5b57\u6bb5\u8bf4\u660e\u5982\u4e0b\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>Connection\uff1a\u5fc5\u987b\u8bbe\u7f6e Upgrade\uff0c\u8868\u793a\u5ba2\u6237\u7aef\u5e0c\u671b\u8fde\u63a5\u5347\u7ea7\uff1b<\/li>\n<li><em>2\uff09<\/em>Upgrade\uff1a\u5b57\u6bb5\u5fc5\u987b\u8bbe\u7f6e websocket\uff0c\u8868\u793a\u5e0c\u671b\u5347\u7ea7\u5230 WebSocket \u534f\u8bae\uff1b<\/li>\n<li><em>3\uff09<\/em>Sec-WebSocket-Version\uff1a\u8868\u793a\u652f\u6301\u7684 WebSocket \u7248\u672c\u3002RFC6455 \u8981\u6c42\u4f7f\u7528\u7684\u7248\u672c\u662f 13\uff0c\u4e4b\u524d\u8349\u6848\u7684\u7248\u672c\u5747\u5e94\u5f53\u5f03\u7528\uff1b<\/li>\n<li><em>4\uff09<\/em>Sec-WebSocket-Key\uff1a\u662f\u968f\u673a\u7684\u5b57\u7b26\u4e32\uff0c\u670d\u52a1\u5668\u7aef\u4f1a\u7528\u8fd9\u4e9b\u6570\u636e\u6765\u6784\u9020\u51fa\u4e00\u4e2a SHA-1 \u7684\u4fe1\u606f\u6458\u8981\uff1b<\/li>\n<li><em>5\uff09<\/em>Sec-WebSocket-Extensions\uff1a\u7528\u4e8e\u534f\u5546\u672c\u6b21\u8fde\u63a5\u8981\u4f7f\u7528\u7684 WebSocket \u6269\u5c55\uff1a\u5ba2\u6237\u7aef\u53d1\u9001\u652f\u6301\u7684\u6269\u5c55\uff0c\u670d\u52a1\u5668\u901a\u8fc7\u8fd4\u56de\u76f8\u540c\u7684\u9996\u90e8\u786e\u8ba4\u81ea\u5df1\u652f\u6301\u4e00\u4e2a\u6216\u591a\u4e2a\u6269\u5c55\uff1b<\/li>\n<li><em>6\uff09<\/em>Origin\uff1a\u5b57\u6bb5\u662f\u53ef\u9009\u7684\uff0c\u901a\u5e38\u7528\u6765\u8868\u793a\u5728\u6d4f\u89c8\u5668\u4e2d\u53d1\u8d77\u6b64 WebSocket \u8fde\u63a5\u6240\u5728\u7684\u9875\u9762\uff0c\u7c7b\u4f3c\u4e8e Referer\u3002\u4f46\u662f\uff0c\u4e0e Referer \u4e0d\u540c\u7684\u662f\uff0cOrigin \u53ea\u5305\u542b\u4e86\u534f\u8bae\u548c\u4e3b\u673a\u540d\u79f0\u3002<\/li>\n<\/ul>\n<p><strong>\u9488\u5bf9\u4e0a\u8ff0\u7b2c4\uff09\u70b9\uff1a<\/strong>\u628a \u201c<em>Sec-WebSocket-Key<\/em>\u201d \u52a0\u4e0a\u4e00\u4e2a\u7279\u6b8a\u5b57\u7b26\u4e32 \u201c<em>258EAFA5-E914-47DA-95CA-C5AB0DC85B11<\/em>\u201d\uff0c\u7136\u540e\u8ba1\u7b97 SHA-1 \u6458\u8981\uff0c\u4e4b\u540e\u8fdb\u884c Base64 \u7f16\u7801\uff0c\u5c06\u7ed3\u679c\u505a\u4e3a \u201c<em>Sec-WebSocket-Accept<\/em>\u201d \u5934\u7684\u503c\uff0c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u5982\u6b64\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5c3d\u91cf\u907f\u514d\u666e\u901a HTTP \u8bf7\u6c42\u88ab\u8bef\u8ba4\u4e3a WebSocket \u534f\u8bae\u3002<\/p>\n<p><strong><em>5.2.2\uff09\u670d\u52a1\u7aef\u54cd\u5e94\uff1a<\/em><\/strong><\/p>\n<blockquote><p>HTTP\/1.1 101 Web Socket Protocol Handshake \u2460 Connection: Upgrade \u2461 Upgrade: websocket \u2462 Sec-WebSocket-Accept: 52Rg3vW4JQ1yWpkvFlsTsiezlqw= \u2463<\/p><\/blockquote>\n<p><strong>\u5907\u6ce8\uff1a<\/strong>\u5df2\u5ffd\u7565\u90e8\u5206 HTTP \u54cd\u5e94\u5934\u3002<\/p>\n<p><strong>\u9488\u5bf9\u4e0a\u8ff0\u54cd\u5e94\u4e2d\u7684\u5b57\u6bb5\u8bf4\u660e\u5982\u4e0b\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>\u2460<\/em>\u00a0101 \u54cd\u5e94\u7801\u786e\u8ba4\u5347\u7ea7\u5230 WebSocket \u534f\u8bae\uff1b<\/li>\n<li><em>\u2461<\/em>\u00a0\u8bbe\u7f6e Connection \u5934\u7684\u503c\u4e3a \u201cUpgrade\u201d \u6765\u6307\u793a\u8fd9\u662f\u4e00\u4e2a\u5347\u7ea7\u8bf7\u6c42\uff08HTTP \u534f\u8bae\u63d0\u4f9b\u4e86\u4e00\u79cd\u7279\u6b8a\u7684\u673a\u5236\uff0c\u8fd9\u4e00\u673a\u5236\u5141\u8bb8\u5c06\u4e00\u4e2a\u5df2\u5efa\u7acb\u7684\u8fde\u63a5\u5347\u7ea7\u6210\u65b0\u7684\u3001\u4e0d\u76f8\u5bb9\u7684\u534f\u8bae\uff09\uff1b<\/li>\n<li><em>\u2462<\/em>\u00a0Upgrade \u5934\u6307\u5b9a\u4e00\u9879\u6216\u591a\u9879\u534f\u8bae\u540d\uff0c\u6309\u4f18\u5148\u7ea7\u6392\u5e8f\uff0c\u4ee5\u9017\u53f7\u5206\u9694\u3002\u8fd9\u91cc\u8868\u793a\u5347\u7ea7\u4e3a WebSocket \u534f\u8bae\uff1b<\/li>\n<li><em>\u2463<\/em>\u00a0\u7b7e\u540d\u7684\u952e\u503c\u9a8c\u8bc1\u534f\u8bae\u652f\u6301\u3002<\/li>\n<\/ul>\n<p>\u4ecb\u7ecd\u5b8c WebSocket \u7684\u63e1\u624b\u534f\u8bae\uff0c\u63a5\u4e0b\u6765\u5c06\u4f7f\u7528 Node.js \u6765\u5f00\u53d1\u6211\u4eec\u7684 WebSocket \u670d\u52a1\u5668\u3002<\/p>\n<h4 id=\"8avo5\">5.3 \u5b9e\u73b0\u63e1\u624b\u529f\u80fd<\/h4>\n<p>\u8981\u5f00\u53d1\u4e00\u4e2a WebSocket \u670d\u52a1\u5668\uff0c\u9996\u5148\u6211\u4eec\u9700\u8981\u5148\u5b9e\u73b0\u63e1\u624b\u529f\u80fd\u3002\u8fd9\u91cc\u6211\u4f7f\u7528 Node.js \u5185\u7f6e\u7684 http \u6a21\u5757\u6765\u521b\u5efa\u4e00\u4e2a HTTP \u670d\u52a1\u5668\u3002<\/p>\n<p><strong>\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/strong><\/p>\n<blockquote><p>const http = require(&#8220;http&#8221;); const port = 8888; const { generateAcceptValue } = require(&#8220;.\/util&#8221;); const server = http.createServer((req, res) =&gt; { \u00a0\u00a0res.writeHead(200, { &#8220;Content-Type&#8221;: &#8220;text\/plain; charset=utf-8&#8221;}); \u00a0\u00a0res.end(&#8220;\u5927\u5bb6\u597d\uff0c\u6211\u662f\u963f\u5b9d\u54e5\u3002\u611f\u8c22\u4f60\u9605\u8bfb\u201c\u4f60\u4e0d\u77e5\u9053\u7684WebSocket\u201d&#8221;); }); server.on(&#8220;upgrade&#8221;, function(req, socket) { \u00a0\u00a0if(req.headers[&#8220;upgrade&#8221;] !== &#8220;websocket&#8221;) { \u00a0\u00a0\u00a0\u00a0socket.end(&#8220;HTTP\/1.1 400 Bad Request&#8221;); \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0\/\/ \u8bfb\u53d6\u5ba2\u6237\u7aef\u63d0\u4f9b\u7684Sec-WebSocket-Key \u00a0\u00a0const secWsKey = req.headers[&#8220;sec-websocket-key&#8221;]; \u00a0\u00a0\/\/ \u4f7f\u7528SHA-1\u7b97\u6cd5\u751f\u6210Sec-WebSocket-Accept \u00a0\u00a0const hash = generateAcceptValue(secWsKey); \u00a0\u00a0\/\/ \u8bbe\u7f6eHTTP\u54cd\u5e94\u5934 \u00a0\u00a0const responseHeaders = [ \u00a0\u00a0\u00a0\u00a0&#8220;HTTP\/1.1 101 Web Socket Protocol Handshake&#8221;, \u00a0\u00a0\u00a0\u00a0&#8220;Upgrade: WebSocket&#8221;, \u00a0\u00a0\u00a0\u00a0&#8220;Connection: Upgrade&#8221;, \u00a0\u00a0\u00a0\u00a0`Sec-WebSocket-Accept: ${hash}`, \u00a0\u00a0]; \u00a0\u00a0\/\/ \u8fd4\u56de\u63e1\u624b\u8bf7\u6c42\u7684\u54cd\u5e94\u4fe1\u606f \u00a0\u00a0socket.write(responseHeaders.join(&#8220;\\r\\n&#8221;) + &#8220;\\r\\n\\r\\n&#8221;); }); server.listen(port, () =&gt; \u00a0\u00a0console.log(`Server running at http:\/\/localhost:${port}`) );<\/p><\/blockquote>\n<p><strong>\u5728\u4ee5\u4e0a\u4ee3\u7801\u4e2d\uff1a<\/strong>\u6211\u4eec\u9996\u5148\u5f15\u5165\u4e86\u00a0<em>http<\/em>\u00a0\u6a21\u5757\uff0c\u7136\u540e\u901a\u8fc7\u8c03\u7528\u8be5\u6a21\u5757\u7684\u00a0<em>createServer()<\/em>\u00a0\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a HTTP \u670d\u52a1\u5668\uff0c\u63a5\u7740\u6211\u4eec\u76d1\u542c\u00a0<em>upgrade<\/em>\u00a0\u4e8b\u4ef6\uff0c\u6bcf\u6b21\u670d\u52a1\u5668\u54cd\u5e94\u5347\u7ea7\u8bf7\u6c42\u65f6\u5c31\u4f1a\u89e6\u53d1\u8be5\u4e8b\u4ef6\u3002\u7531\u4e8e\u6211\u4eec\u7684\u670d\u52a1\u5668\u53ea\u652f\u6301\u5347\u7ea7\u5230 WebSocket \u534f\u8bae\uff0c\u6240\u4ee5\u5982\u679c\u5ba2\u6237\u7aef\u8bf7\u6c42\u5347\u7ea7\u7684\u534f\u8bae\u975e WebSocket \u534f\u8bae\uff0c\u6211\u4eec\u5c06\u4f1a\u8fd4\u56de \u201c400 Bad Request\u201d\u3002<\/p>\n<p>\u5f53\u670d\u52a1\u5668\u63a5\u6536\u5230\u5347\u7ea7\u4e3a WebSocket \u7684\u63e1\u624b\u8bf7\u6c42\u65f6\uff0c\u4f1a\u5148\u4ece\u8bf7\u6c42\u5934\u4e2d\u83b7\u53d6 \u201cSec-WebSocket-Key\u201d \u7684\u503c\uff0c\u7136\u540e\u628a\u8be5\u503c\u52a0\u4e0a\u4e00\u4e2a\u7279\u6b8a\u5b57\u7b26\u4e32 \u201c258EAFA5-E914-47DA-95CA-C5AB0DC85B11\u201d\uff0c\u7136\u540e\u8ba1\u7b97 SHA-1 \u6458\u8981\uff0c\u4e4b\u540e\u8fdb\u884c Base64 \u7f16\u7801\uff0c\u5c06\u7ed3\u679c\u505a\u4e3a \u201cSec-WebSocket-Accept\u201d \u5934\u7684\u503c\uff0c\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<p>\u4e0a\u8ff0\u7684\u8fc7\u7a0b\u770b\u8d77\u6765\u597d\u50cf\u6709\u70b9\u7e41\u7410\uff0c\u5176\u5b9e\u5229\u7528 Node.js \u5185\u7f6e\u7684\u00a0<em>crypto<\/em>\u00a0\u6a21\u5757\uff0c\u51e0\u884c\u4ee3\u7801\u5c31\u53ef\u4ee5\u641e\u5b9a\u4e86\u3002<\/p>\n<p><strong>\u4ee3\u7801\u5982\u4e0b\uff1a<\/strong><\/p>\n<blockquote><p>\/\/ util.js const crypto = require(&#8220;crypto&#8221;); const MAGIC_KEY = &#8220;258EAFA5-E914-47DA-95CA-C5AB0DC85B11&#8221;; function generateAcceptValue(secWsKey) { \u00a0\u00a0return crypto \u00a0\u00a0\u00a0\u00a0.createHash(&#8220;sha1&#8221;) \u00a0\u00a0\u00a0\u00a0.update(secWsKey + MAGIC_KEY, &#8220;utf8&#8221;) \u00a0\u00a0\u00a0\u00a0.digest(&#8220;base64&#8221;); }<\/p><\/blockquote>\n<p>\u5f00\u53d1\u5b8c\u63e1\u624b\u529f\u80fd\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u524d\u9762\u7684\u793a\u4f8b\u6765\u6d4b\u8bd5\u4e00\u4e0b\u8be5\u529f\u80fd\u3002\u5f85\u670d\u52a1\u5668\u542f\u52a8\u4e4b\u540e\uff0c\u6211\u4eec\u53ea\u8981\u5bf9 \u201c\u53d1\u9001\u666e\u901a\u6587\u672c\u201d \u793a\u4f8b\uff0c\u505a\u7b80\u5355\u5730\u8c03\u6574\uff0c\u5373\u628a\u5148\u524d\u7684 URL \u5730\u5740\u66ff\u6362\u6210\u00a0ws:\/\/localhost:8888\uff0c\u5c31\u53ef\u4ee5\u8fdb\u884c\u529f\u80fd\u9a8c\u8bc1\u3002<\/p>\n<p><strong>\u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4eec\u53ef\u4ee5\u8bd5\u8bd5\u770b\uff0c\u4ee5\u4e0b\u662f\u6211\u7684\u672c\u5730\u8fd0\u884c\u540e\u7684\u7ed3\u679c\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/4adc8ba4561280241613e0b65e4d005f.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u4ece\u4e0a\u56fe\u53ef\u77e5\uff1a<\/strong>\u6211\u4eec\u5b9e\u73b0\u7684\u63e1\u624b\u529f\u80fd\u5df2\u7ecf\u53ef\u4ee5\u6b63\u5e38\u5de5\u4f5c\u4e86\u3002\u90a3\u4e48\u63e1\u624b\u6709\u6ca1\u6709\u53ef\u80fd\u5931\u8d25\u5462\uff1f\u7b54\u6848\u662f\u80af\u5b9a\u7684\u3002\u6bd4\u5982\u7f51\u7edc\u95ee\u9898\u3001\u670d\u52a1\u5668\u5f02\u5e38\u6216\u00a0Sec-WebSocket-Accept\u00a0\u7684\u503c\u4e0d\u6b63\u786e\u3002<\/p>\n<p>\u4e0b\u9762\u6765\u6539\u4e00\u4e0b \u201cSec-WebSocket-Accept\u201d \u751f\u6210\u89c4\u5219\uff0c\u6bd4\u5982\u4fee\u6539\u00a0MAGIC_KEY\u00a0\u7684\u503c\uff0c\u7136\u540e\u91cd\u65b0\u9a8c\u8bc1\u4e00\u4e0b\u63e1\u624b\u529f\u80fd\u3002<\/p>\n<p><strong>\u6b64\u65f6\uff0c\u6d4f\u89c8\u5668\u7684\u63a7\u5236\u53f0\u4f1a\u8f93\u51fa\u4ee5\u4e0b\u5f02\u5e38\u4fe1\u606f\uff1a<\/strong><\/p>\n<blockquote><p>WebSocket connection to &#8216;ws:\/\/localhost:8888\/&#8217;failed: Error during WebSocket handshake: Incorrect &#8216;Sec-WebSocket-Accept&#8217;header value<\/p><\/blockquote>\n<p>\u5982\u679c\u4f60\u7684 WebSocket \u670d\u52a1\u5668\u8981\u652f\u6301\u5b50\u534f\u8bae\u7684\u8bdd\uff0c\u4f60\u53ef\u4ee5\u53c2\u8003\u4ee5\u4e0b\u4ee3\u7801\u8fdb\u884c\u5b50\u534f\u8bae\u7684\u5904\u7406\uff0c\u8fd9\u91cc\u5c31\u4e0d\u7ee7\u7eed\u5c55\u5f00\u4ecb\u7ecd\u4e86\u3002<\/p>\n<blockquote><p>\/\/ \u4ece\u8bf7\u6c42\u5934\u4e2d\u8bfb\u53d6\u5b50\u534f\u8bae const protocol = req.headers[&#8220;sec-websocket-protocol&#8221;]; \/\/ \u5982\u679c\u5305\u542b\u5b50\u534f\u8bae\uff0c\u5219\u89e3\u6790\u5b50\u534f\u8bae const protocols = !protocol ? [] : protocol.split(&#8220;,&#8221;).map((s) =&gt; s.trim()); \/\/ \u7b80\u5355\u8d77\u89c1\uff0c\u6211\u4eec\u4ec5\u5224\u65ad\u662f\u5426\u542b\u6709JSON\u5b50\u534f\u8bae if(protocols.includes(&#8220;json&#8221;)) { \u00a0\u00a0responseHeaders.push(`Sec-WebSocket-Protocol: json`); }<\/p><\/blockquote>\n<p>\u597d\u7684\uff0cWebSocket \u63e1\u624b\u534f\u8bae\u76f8\u5173\u7684\u5185\u5bb9\u57fa\u672c\u5df2\u7ecf\u4ecb\u7ecd\u5b8c\u4e86\u3002\u4e0b\u4e00\u6b65\u6211\u4eec\u6765\u4ecb\u7ecd\u5f00\u53d1\u6d88\u606f\u901a\u4fe1\u529f\u80fd\u9700\u8981\u4e86\u89e3\u7684\u4e00\u4e9b\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n<h4 id=\"if6p\">5.4 \u6d88\u606f\u901a\u4fe1\u57fa\u7840<\/h4>\n<p>\u5728 WebSocket \u534f\u8bae\u4e2d\uff0c\u6570\u636e\u662f\u901a\u8fc7\u4e00\u7cfb\u5217\u6570\u636e\u5e27\u6765\u8fdb\u884c\u4f20\u8f93\u7684\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u7531\u4e8e\u7f51\u7edc\u4e2d\u4ecb\uff08\u4f8b\u5982\u4e00\u4e9b\u62e6\u622a\u4ee3\u7406\uff09\u6216\u8005\u4e00\u4e9b\u5b89\u5168\u95ee\u9898\uff0c\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u5b83\u53d1\u9001\u5230\u670d\u52a1\u5668\u7684\u6240\u6709\u5e27\u4e2d\u6dfb\u52a0\u63a9\u7801\u3002\u670d\u52a1\u7aef\u6536\u5230\u6ca1\u6709\u6dfb\u52a0\u63a9\u7801\u7684\u6570\u636e\u5e27\u4ee5\u540e\uff0c\u5fc5\u987b\u7acb\u5373\u5173\u95ed\u8fde\u63a5\u3002<\/p>\n<p><strong><em>5.4.1\uff09\u6570\u636e\u5e27\u683c\u5f0f\uff1a<\/em><\/strong><\/p>\n<p><strong>\u8981\u5b9e\u73b0\u6d88\u606f\u901a\u4fe1\uff0c\u6211\u4eec\u5c31\u5fc5\u987b\u4e86\u89e3 WebSocket \u6570\u636e\u5e27\u7684\u683c\u5f0f\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/9ce292bc8ad93137b6cdf227232db4bb.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u53ef\u80fd\u6709\u4e00\u4e9b\u5c0f\u4f19\u4f34\u770b\u5230\u4e0a\u9762\u7684\u5185\u5bb9\u4e4b\u540e\uff0c\u5c31\u5f00\u59cb\u6709\u70b9 \u201c\u61f5\u903c\u201d \u4e86\u3002<\/p>\n<p><strong>\u4e0b\u9762\u6211\u4eec\u6765\u7ed3\u5408\u5b9e\u9645\u7684\u6570\u636e\u5e27\u6765\u8fdb\u4e00\u6b65\u5206\u6790\u4e00\u4e0b\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/8719f10607cf653f7b3f6d6739e97382.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u5728\u4e0a\u56fe\u4e2d\uff1a<\/strong>\u7b80\u5355\u5206\u6790\u4e86 \u201c\u53d1\u9001\u666e\u901a\u6587\u672c\u201d \u793a\u4f8b\u5bf9\u5e94\u7684\u6570\u636e\u5e27\u683c\u5f0f\u3002\u8fd9\u91cc\u6211\u4eec\u6765\u8fdb\u4e00\u6b65\u4ecb\u7ecd\u4e00\u4e0b\u00a0Payload length\uff0c\u56e0\u4e3a\u5728\u540e\u9762\u5f00\u53d1\u6570\u636e\u89e3\u6790\u529f\u80fd\u7684\u65f6\u5019\uff0c\u9700\u8981\u7528\u5230\u8be5\u77e5\u8bc6\u70b9\u3002<\/p>\n<p>Payload length\u00a0\u8868\u793a\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\u7684 \u201c\u6709\u6548\u8d1f\u8f7d\u6570\u636e\u201d \u957f\u5ea6\u3002<\/p>\n<p><strong>\u5b83\u6709\u4ee5\u4e0b\u51e0\u79cd\u60c5\u5f62\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09\u5982\u679c\u503c\u4e3a 0-125\uff0c\u90a3\u4e48\u5c31\u8868\u793a\u8d1f\u8f7d\u6570\u636e\u7684\u957f\u5ea6\uff1b<\/li>\n<li>2\uff09\u5982\u679c\u662f 126\uff0c\u90a3\u4e48\u63a5\u4e0b\u6765\u7684 2 \u4e2a\u5b57\u8282\u89e3\u91ca\u4e3a 16 \u4f4d\u7684\u65e0\u7b26\u53f7\u6574\u5f62\u4f5c\u4e3a\u8d1f\u8f7d\u6570\u636e\u7684\u957f\u5ea6\uff1b<\/li>\n<li>3\uff09\u5982\u679c\u662f 127\uff0c\u90a3\u4e48\u63a5\u4e0b\u6765\u7684 8 \u4e2a\u5b57\u8282\u89e3\u91ca\u4e3a\u4e00\u4e2a 64 \u4f4d\u7684\u65e0\u7b26\u53f7\u6574\u5f62\uff08\u6700\u9ad8\u4f4d\u7684 bit \u5fc5\u987b\u4e3a 0\uff09\u4f5c\u4e3a\u8d1f\u8f7d\u6570\u636e\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p><strong>\u5907\u6ce8\uff1a<\/strong>\u591a\u5b57\u8282\u957f\u5ea6\u91cf\u4ee5\u7f51\u7edc\u5b57\u8282\u987a\u5e8f\u8868\u793a\uff0c\u6709\u6548\u8d1f\u8f7d\u957f\u5ea6\u662f\u6307 \u201c\u6269\u5c55\u6570\u636e\u201d + \u201c\u5e94\u7528\u6570\u636e\u201d \u7684\u957f\u5ea6\u3002\u201c\u6269\u5c55\u6570\u636e\u201d \u7684\u957f\u5ea6\u53ef\u80fd\u4e3a 0\uff0c\u90a3\u4e48\u6709\u6548\u8d1f\u8f7d\u957f\u5ea6\u5c31\u662f \u201c\u5e94\u7528\u6570\u636e\u201d \u7684\u957f\u5ea6\u3002<\/p>\n<p><strong>\u53e6\u5916\uff1a<\/strong>\u9664\u975e\u534f\u5546\u8fc7\u6269\u5c55\uff0c\u5426\u5219 \u201c\u6269\u5c55\u6570\u636e\u201d \u957f\u5ea6\u4e3a 0 \u5b57\u8282\u3002\u5728\u63e1\u624b\u534f\u8bae\u4e2d\uff0c\u4efb\u4f55\u6269\u5c55\u90fd\u5fc5\u987b\u6307\u5b9a \u201c\u6269\u5c55\u6570\u636e\u201d \u7684\u957f\u5ea6\uff0c\u8fd9\u4e2a\u957f\u5ea6\u5982\u4f55\u8fdb\u884c\u8ba1\u7b97\uff0c\u4ee5\u53ca\u8fd9\u4e2a\u6269\u5c55\u5982\u4f55\u4f7f\u7528\u3002\u5982\u679c\u5b58\u5728\u6269\u5c55\uff0c\u90a3\u4e48\u8fd9\u4e2a \u201c\u6269\u5c55\u6570\u636e\u201d \u5305\u542b\u5728\u603b\u7684\u6709\u6548\u8d1f\u8f7d\u957f\u5ea6\u4e2d\u3002<\/p>\n<p><strong>PS\uff1a<\/strong>\u5173\u4e8e\u6570\u636e\u5e27\u683c\u5f0f\u7684\u8be6\u7ec6\u8bb2\u89e3\uff0c\u53ef\u4ee5\u6df1\u5165\u8bfb\u8bfb\u4ee5\u4e0b\u51e0\u7bc7\uff1a<\/p>\n<ul class=\"ul-level-0\">\n<li>\u300aWebSocket\u4ece\u5165\u95e8\u5230\u7cbe\u901a\uff0c\u534a\u5c0f\u65f6\u5c31\u591f\uff01\u300b<\/li>\n<li>\u300a\u7406\u8bba\u8054\u7cfb\u5b9e\u9645\uff1a\u4ece\u96f6\u7406\u89e3WebSocket\u7684\u901a\u4fe1\u539f\u7406\u3001\u534f\u8bae\u683c\u5f0f\u3001\u5b89\u5168\u6027\u300b<\/li>\n<\/ul>\n<p><strong><em>5.4.2\uff09\u63a9\u7801\u7b97\u6cd5\uff1a<\/em><\/strong><\/p>\n<p>\u63a9\u7801\u5b57\u6bb5\u662f\u4e00\u4e2a\u7531\u5ba2\u6237\u7aef\u968f\u673a\u9009\u62e9\u7684 32 \u4f4d\u7684\u503c\u3002\u63a9\u7801\u503c\u5fc5\u987b\u662f\u4e0d\u53ef\u88ab\u9884\u6d4b\u7684\u3002\u56e0\u6b64\uff0c\u63a9\u7801\u5fc5\u987b\u6765\u81ea\u5f3a\u5927\u7684\u71b5\u6e90\uff08entropy\uff09\uff0c\u5e76\u4e14\u7ed9\u5b9a\u7684\u63a9\u7801\u4e0d\u80fd\u8ba9\u670d\u52a1\u5668\u6216\u8005\u4ee3\u7406\u80fd\u591f\u5f88\u5bb9\u6613\u7684\u9884\u6d4b\u5230\u540e\u7eed\u5e27\u3002\u63a9\u7801\u7684\u4e0d\u53ef\u9884\u6d4b\u6027\u5bf9\u4e8e\u9884\u9632\u6076\u610f\u5e94\u7528\u7684\u4f5c\u8005\u5728\u7f51\u4e0a\u66b4\u9732\u76f8\u5173\u7684\u5b57\u8282\u6570\u636e\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u63a9\u7801\u4e0d\u5f71\u54cd\u6570\u636e\u8377\u8f7d\u7684\u957f\u5ea6\uff0c\u5bf9\u6570\u636e\u8fdb\u884c\u63a9\u7801\u64cd\u4f5c\u548c\u5bf9\u6570\u636e\u8fdb\u884c\u53cd\u63a9\u7801\u64cd\u4f5c\u6240\u6d89\u53ca\u7684\u6b65\u9aa4\u662f\u76f8\u540c\u7684\u3002<\/p>\n<p><strong>\u63a9\u7801\u3001\u53cd\u63a9\u7801\u64cd\u4f5c\u90fd\u91c7\u7528\u5982\u4e0b\u7b97\u6cd5\uff1a<\/strong><\/p>\n<blockquote><p>j = i MOD 4 transformed-octet-i = original-octet-i XOR masking-key-octet-j<\/p><\/blockquote>\n<p><strong>\u89e3\u91ca\u4e00\u4e0b\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>original-octet-i\uff1a\u4e3a\u539f\u59cb\u6570\u636e\u7684\u7b2c i \u5b57\u8282\uff1b<\/li>\n<li><em>2\uff09<\/em>transformed-octet-i\uff1a\u4e3a\u8f6c\u6362\u540e\u7684\u6570\u636e\u7684\u7b2c i \u5b57\u8282\uff1b<\/li>\n<li><em>3\uff09<\/em>masking-key-octet-j\uff1a\u4e3a mask key \u7b2c j \u5b57\u8282\u3002<\/li>\n<\/ul>\n<p>\u4e3a\u4e86\u8ba9\u5c0f\u4f19\u4f34\u4eec\u80fd\u591f\u66f4\u597d\u7684\u7406\u89e3\u4e0a\u9762\u63a9\u7801\u7684\u8ba1\u7b97\u8fc7\u7a0b\uff0c\u6211\u4eec\u6765\u5bf9\u793a\u4f8b\u4e2d \u201c\u6211\u662f\u963f\u5b9d\u54e5\u201d \u6570\u636e\u8fdb\u884c\u63a9\u7801\u64cd\u4f5c\u3002<\/p>\n<p><strong>\u8fd9\u91cc \u201c\u6211\u662f\u963f\u5b9d\u54e5\u201d \u5bf9\u5e94\u7684 UTF-8 \u7f16\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/strong><\/p>\n<blockquote><p>E6 88 91 E6 98 AF E9 98 BF E5 AE 9D E5 93 A5<\/p><\/blockquote>\n<p>\u800c\u5bf9\u5e94\u7684\u00a0Masking-Key\u00a0\u4e3a\u00a00x08f6efb1\u3002<\/p>\n<p><strong>\u6839\u636e\u4e0a\u9762\u7684\u7b97\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u8fdb\u884c\u63a9\u7801\u8fd0\u7b97\uff1a<\/strong><\/p>\n<blockquote><p>let uint8 = new Uint8Array([0xE6, 0x88, 0x91, 0xE6, 0x98, 0xAF, 0xE9, 0x98,0xBF, 0xE5, 0xAE, 0x9D, 0xE5, 0x93, 0xA5]); let maskingKey = new Uint8Array([0x08, 0xf6, 0xef, 0xb1]); let maskedUint8 = new Uint8Array(uint8.length); for(let i = 0, j = 0; i &lt; uint8.length; i++, j = i % 4) { \u00a0\u00a0maskedUint8[i ] = uint8[i ] ^ maskingKey[j]; } console.log(Array.from(maskedUint8).map(num=&gt;Number(num).toString(16)).join(&#8216; &#8216;));<\/p><\/blockquote>\n<p><strong>\u4ee5\u4e0a\u4ee3\u7801\u6210\u529f\u8fd0\u884c\u540e\uff0c\u63a7\u5236\u53f0\u4f1a\u8f93\u51fa\u4ee5\u4e0b\u7ed3\u679c\uff1a<\/strong><\/p>\n<blockquote><p>ee 7e 7e 57 90 59 6 29 b7 13 41 2c ed 65 4a<\/p><\/blockquote>\n<p><strong>\u4e0a\u8ff0\u7ed3\u679c\u4e0e WireShark \u4e2d\u7684 Masked payload \u5bf9\u5e94\u7684\u503c\u662f\u4e00\u81f4\u7684\uff0c\u5177\u4f53\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/fbc0343140c7e936cbcfe7aaaed9bc4d.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\u5728 WebSocket \u534f\u8bae\u4e2d\uff0c\u6570\u636e\u63a9\u7801\u7684\u4f5c\u7528\u662f\u589e\u5f3a\u534f\u8bae\u7684\u5b89\u5168\u6027\u3002\u4f46\u6570\u636e\u63a9\u7801\u5e76\u4e0d\u662f\u4e3a\u4e86\u4fdd\u62a4\u6570\u636e\u672c\u8eab\uff0c\u56e0\u4e3a\u7b97\u6cd5\u672c\u8eab\u662f\u516c\u5f00\u7684\uff0c\u8fd0\u7b97\u4e5f\u4e0d\u590d\u6742\u3002<\/p>\n<p>\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8fd8\u8981\u5f15\u5165\u6570\u636e\u63a9\u7801\u5462\uff1f\u5f15\u5165\u6570\u636e\u63a9\u7801\u662f\u4e3a\u4e86\u9632\u6b62\u65e9\u671f\u7248\u672c\u7684\u534f\u8bae\u4e2d\u5b58\u5728\u7684\u4ee3\u7406\u7f13\u5b58\u6c61\u67d3\u653b\u51fb\u7b49\u95ee\u9898\u3002<\/p>\n<p>\u4e86\u89e3\u5b8c WebSocket \u63a9\u7801\u7b97\u6cd5\u548c\u6570\u636e\u63a9\u7801\u7684\u4f5c\u7528\u4e4b\u540e\uff0c\u6211\u4eec\u518d\u6765\u4ecb\u7ecd\u4e00\u4e0b<span class=\"mod-overview__keyword\">\u6570\u636e\u5206\u7247<\/span>\u7684\u6982\u5ff5\u3002<\/p>\n<p><strong><em>5.4.3\uff09\u6570\u636e\u5206\u7247\uff1a<\/em><\/strong><\/p>\n<p>WebSocket \u7684\u6bcf\u6761\u6d88\u606f\u53ef\u80fd\u88ab\u5207\u5206\u6210\u591a\u4e2a\u6570\u636e\u5e27\u3002\u5f53 WebSocket \u7684\u63a5\u6536\u65b9\u6536\u5230\u4e00\u4e2a\u6570\u636e\u5e27\u65f6\uff0c\u4f1a\u6839\u636e FIN \u7684\u503c\u6765\u5224\u65ad\uff0c\u662f\u5426\u5df2\u7ecf\u6536\u5230\u6d88\u606f\u7684\u6700\u540e\u4e00\u4e2a\u6570\u636e\u5e27\u3002<\/p>\n<p>\u5229\u7528\u00a0FIN\u00a0\u548c\u00a0Opcode\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8de8\u5e27\u53d1\u9001\u6d88\u606f\u3002<\/p>\n<p><strong>\u64cd\u4f5c\u7801\u544a\u8bc9\u4e86\u5e27\u5e94\u8be5\u505a\u4ec0\u4e48\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09\u5982\u679c\u662f 0x1\uff0c\u6709\u6548\u8f7d\u8377\u5c31\u662f\u6587\u672c\uff1b<\/li>\n<li>2\uff09\u5982\u679c\u662f 0x2\uff0c\u6709\u6548\u8f7d\u8377\u5c31\u662f\u4e8c\u8fdb\u5236\u6570\u636e\uff1b<\/li>\n<li>3\uff09\u5982\u679c\u662f 0x0\uff0c\u5219\u8be5\u5e27\u662f\u4e00\u4e2a\u5ef6\u7eed\u5e27\uff08\u8fd9\u610f\u5473\u7740\u670d\u52a1\u5668\u5e94\u8be5\u5c06\u5e27\u7684\u6709\u6548\u8d1f\u8f7d\u8fde\u63a5\u5230\u4ece\u8be5\u5ba2\u6237\u673a\u63a5\u6536\u5230\u7684\u6700\u540e\u4e00\u4e2a\u5e27\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u4e3a\u4e86\u8ba9\u5927\u5bb6\u80fd\u591f\u66f4\u597d\u5730\u7406\u89e3\u4e0a\u8ff0\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u6765\u81ea\u00a0<\/strong><a class=\"\" href=\"https:\/\/cloud.tencent.com\/developer\/tools\/blog-entry?target=https%3A%2F%2Fdeveloper.mozilla.org%2Fzh-CN%2Fdocs%2FWeb%2FAPI%2FWebSockets_API%2FWriting_WebSocket_servers&amp;objectId=1887095&amp;objectType=1&amp;contentType=undefined\"><strong>MDN<\/strong><\/a><strong>\u00a0\u4e0a\u7684\u793a\u4f8b\uff1a<\/strong><\/p>\n<blockquote><p>Client: FIN=1, opcode=0x1, msg=&#8221;hello&#8221; Server: (process complete message immediately) Hi. Client: FIN=0, opcode=0x1, msg=&#8221;and a&#8221; Server: (listening, newmessage containing text started) Client: FIN=0, opcode=0x0, msg=&#8221;happy new&#8221; Server: (listening, payload concatenated to previous message) Client: FIN=1, opcode=0x0, msg=&#8221;year!&#8221; Server: (process complete message) Happy newyear to you too!<\/p><\/blockquote>\n<p><strong>\u5728\u4ee5\u4e0a\u793a\u4f8b\u4e2d\uff1a<\/strong>\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e86\u4e24\u6761\u6d88\u606f\uff0c\u7b2c\u4e00\u4e2a\u6d88\u606f\u5728\u5355\u4e2a\u5e27\u4e2d\u53d1\u9001\uff0c\u800c\u7b2c\u4e8c\u4e2a\u6d88\u606f\u8de8\u4e09\u4e2a\u5e27\u53d1\u9001\u3002<\/p>\n<p><strong>\u5176\u4e2d\uff1a<\/strong>\u7b2c\u4e00\u4e2a\u6d88\u606f\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u6d88\u606f\uff08FIN=1 \u4e14 opcode != 0x0)\uff0c\u56e0\u6b64\u670d\u52a1\u5668\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u5904\u7406\u6216\u54cd\u5e94\u3002\u800c\u7b2c\u4e8c\u4e2a\u6d88\u606f\u662f\u6587\u672c\u6d88\u606f\uff08opcode=0x1\uff09\u4e14 FIN=0\uff0c\u8868\u793a\u6d88\u606f\u8fd8\u6ca1\u53d1\u9001\u5b8c\u6210\uff0c\u8fd8\u6709\u540e\u7eed\u7684\u6570\u636e\u5e27\u3002\u8be5\u6d88\u606f\u7684\u6240\u6709\u5269\u4f59\u90e8\u5206\u90fd\u7528\u5ef6\u7eed\u5e27\uff08opcode=0x0\uff09\u53d1\u9001\uff0c\u6d88\u606f\u7684\u6700\u7ec8\u5e27\u7528 FIN=1 \u6807\u8bb0\u3002<\/p>\n<p>\u597d\u7684\uff0c\u7b80\u5355\u4ecb\u7ecd\u4e86\u6570\u636e\u5206\u7247\u7684\u76f8\u5173\u5185\u5bb9\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u6765\u5f00\u59cb\u5b9e\u73b0\u6d88\u606f\u901a\u4fe1\u529f\u80fd\u3002<\/p>\n<h4 id=\"6an46\">5.5 \u5b9e\u73b0\u6d88\u606f\u901a\u4fe1\u529f\u80fd<\/h4>\n<p>\u7b14\u8005\u628a\u5b9e\u73b0\u6d88\u606f\u901a\u4fe1\u529f\u80fd\uff0c\u5206\u89e3\u4e3a\u6d88\u606f\u89e3\u6790\u4e0e\u6d88\u606f\u54cd\u5e94\u4e24\u4e2a\u5b50\u529f\u80fd\uff0c\u4e0b\u9762\u6211\u4eec\u5206\u522b\u6765\u4ecb\u7ecd\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e24\u4e2a\u5b50\u529f\u80fd\u3002<\/p>\n<p><strong><em>5.5.1\uff09\u6d88\u606f\u89e3\u6790\uff1a<\/em><\/strong><\/p>\n<p>\u5229\u7528\u6d88\u606f\u901a\u4fe1\u57fa\u7840\u73af\u8282\u4e2d\u4ecb\u7ecd\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u6211\u5b9e\u73b0\u4e86\u4e00\u4e2a\u00a0<em>parseMessage<\/em>\u00a0\u51fd\u6570\uff0c\u7528\u6765\u89e3\u6790\u5ba2\u6237\u7aef\u4f20\u8fc7\u6765\u7684 WebSocket \u6570\u636e\u5e27\u3002<\/p>\n<p><strong>\u51fa\u4e8e\u7b80\u5355\u8003\u8651\uff0c\u8fd9\u91cc\u53ea\u5904\u7406\u6587\u672c\u5e27\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/strong><\/p>\n<blockquote><p>function parseMessage(buffer) { \u00a0\u00a0\/\/ \u7b2c\u4e00\u4e2a\u5b57\u8282\uff0c\u5305\u542b\u4e86FIN\u4f4d\uff0copcode, \u63a9\u7801\u4f4d \u00a0\u00a0const firstByte = buffer.readUInt8(0); \u00a0\u00a0\/\/ [FIN, RSV, RSV, RSV, OPCODE, OPCODE, OPCODE, OPCODE]; \u00a0\u00a0\/\/ \u53f3\u79fb7\u4f4d\u53d6\u9996\u4f4d\uff0c1\u4f4d\uff0c\u8868\u793a\u662f\u5426\u662f\u6700\u540e\u4e00\u5e27\u6570\u636e \u00a0\u00a0const isFinalFrame = Boolean((firstByte &gt;&gt;&gt; 7) &amp; 0x01); \u00a0\u00a0console.log(&#8220;isFIN: &#8220;, isFinalFrame); \u00a0\u00a0\/\/ \u53d6\u51fa\u64cd\u4f5c\u7801\uff0c\u4f4e\u56db\u4f4d \u00a0\u00a0\/** \u00a0\u00a0\u00a0* %x0\uff1a\u8868\u793a\u4e00\u4e2a\u5ef6\u7eed\u5e27\u3002\u5f53 Opcode \u4e3a 0 \u65f6\uff0c\u8868\u793a\u672c\u6b21\u6570\u636e\u4f20\u8f93\u91c7\u7528\u4e86\u6570\u636e\u5206\u7247\uff0c\u5f53\u524d\u6536\u5230\u7684\u6570\u636e\u5e27\u4e3a\u5176\u4e2d\u4e00\u4e2a\u6570\u636e\u5206\u7247\uff1b \u00a0\u00a0\u00a0* %x1\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u6587\u672c\u5e27\uff08text frame\uff09\uff1b \u00a0\u00a0\u00a0* %x2\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u5e27\uff08binary frame\uff09\uff1b \u00a0\u00a0\u00a0* %x3-7\uff1a\u4fdd\u7559\u7684\u64cd\u4f5c\u4ee3\u7801\uff0c\u7528\u4e8e\u540e\u7eed\u5b9a\u4e49\u7684\u975e\u63a7\u5236\u5e27\uff1b \u00a0\u00a0\u00a0* %x8\uff1a\u8868\u793a\u8fde\u63a5\u65ad\u5f00\uff1b \u00a0\u00a0\u00a0* %x9\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u5fc3\u8df3\u8bf7\u6c42\uff08ping\uff09\uff1b \u00a0\u00a0\u00a0* %xA\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u5fc3\u8df3\u54cd\u5e94\uff08pong\uff09\uff1b \u00a0\u00a0\u00a0* %xB-F\uff1a\u4fdd\u7559\u7684\u64cd\u4f5c\u4ee3\u7801\uff0c\u7528\u4e8e\u540e\u7eed\u5b9a\u4e49\u7684\u63a7\u5236\u5e27\u3002 \u00a0\u00a0\u00a0*\/ \u00a0\u00a0const opcode = firstByte &amp; 0x0f; \u00a0\u00a0if(opcode === 0x08) { \u00a0\u00a0\u00a0\u00a0\/\/ \u8fde\u63a5\u5173\u95ed \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0if(opcode === 0x02) { \u00a0\u00a0\u00a0\u00a0\/\/ \u4e8c\u8fdb\u5236\u5e27 \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0if(opcode === 0x01) { \u00a0\u00a0\u00a0\u00a0\/\/ \u76ee\u524d\u53ea\u5904\u7406\u6587\u672c\u5e27 \u00a0\u00a0\u00a0\u00a0let offset = 1; \u00a0\u00a0\u00a0\u00a0const secondByte = buffer.readUInt8(offset); \u00a0\u00a0\u00a0\u00a0\/\/ MASK: 1\u4f4d\uff0c\u8868\u793a\u662f\u5426\u4f7f\u7528\u4e86\u63a9\u7801\uff0c\u5728\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\u7684\u6570\u636e\u5e27\u91cc\u5fc5\u987b\u4f7f\u7528\u63a9\u7801\uff0c\u800c\u670d\u52a1\u7aef\u8fd4\u56de\u65f6\u4e0d\u9700\u8981\u63a9\u7801 \u00a0\u00a0\u00a0\u00a0const useMask = Boolean((secondByte &gt;&gt;&gt; 7) &amp; 0x01); \u00a0\u00a0\u00a0\u00a0console.log(&#8220;use MASK: &#8220;, useMask); \u00a0\u00a0\u00a0\u00a0const payloadLen = secondByte &amp; 0x7f; \/\/ \u4f4e7\u4f4d\u8868\u793a\u8f7d\u8377\u5b57\u8282\u957f\u5ea6 \u00a0\u00a0\u00a0\u00a0offset += 1; \u00a0\u00a0\u00a0\u00a0\/\/ \u56db\u4e2a\u5b57\u8282\u7684\u63a9\u7801 \u00a0\u00a0\u00a0\u00a0let MASK = []; \u00a0\u00a0\u00a0\u00a0\/\/ \u5982\u679c\u8fd9\u4e2a\u503c\u57280-125\u4e4b\u95f4\uff0c\u5219\u540e\u9762\u76844\u4e2a\u5b57\u8282\uff0832\u4f4d\uff09\u5c31\u5e94\u8be5\u88ab\u76f4\u63a5\u8bc6\u522b\u6210\u63a9\u7801\uff1b \u00a0\u00a0\u00a0\u00a0if(payloadLen &lt;= 0x7d) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u8f7d\u8377\u957f\u5ea6\u5c0f\u4e8e125 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MASK = buffer.slice(offset, 4 + offset); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0offset += 4; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;payload length: &#8220;, payloadLen); \u00a0\u00a0\u00a0\u00a0} elseif(payloadLen === 0x7e) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u5982\u679c\u8fd9\u4e2a\u503c\u662f126\uff0c\u5219\u540e\u9762\u4e24\u4e2a\u5b57\u8282\uff0816\u4f4d\uff09\u5185\u5bb9\u5e94\u8be5\uff0c\u88ab\u8bc6\u522b\u6210\u4e00\u4e2a16\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u8868\u793a\u6570\u636e\u5185\u5bb9\u5927\u5c0f\uff1b \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;payload length: &#8220;, buffer.readInt16BE(offset)); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u957f\u5ea6\u662f126\uff0c \u5219\u540e\u9762\u4e24\u4e2a\u5b57\u8282\u4f5c\u4e3apayload length\uff0c32\u4f4d\u7684\u63a9\u7801 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MASK = buffer.slice(offset + 2, offset + 2 + 4); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0offset += 6; \u00a0\u00a0\u00a0\u00a0} else{ \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u5982\u679c\u8fd9\u4e2a\u503c\u662f127\uff0c\u5219\u540e\u9762\u76848\u4e2a\u5b57\u8282\uff0864\u4f4d\uff09\u5185\u5bb9\u5e94\u8be5\u88ab\u8bc6\u522b\u6210\u4e00\u4e2a64\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u8868\u793a\u6570\u636e\u5185\u5bb9\u5927\u5c0f \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MASK = buffer.slice(offset + 8, offset + 8 + 4); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0offset += 12; \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0\/\/ \u5f00\u59cb\u8bfb\u53d6\u540e\u9762\u7684payload\uff0c\u4e0e\u63a9\u7801\u8ba1\u7b97\uff0c\u5f97\u5230\u539f\u6765\u7684\u5b57\u8282\u5185\u5bb9 \u00a0\u00a0\u00a0\u00a0const newBuffer = []; \u00a0\u00a0\u00a0\u00a0const dataBuffer = buffer.slice(offset); \u00a0\u00a0\u00a0\u00a0for(let i = 0, j = 0; i &lt; dataBuffer.length; i++, j = i % 4) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const nextBuf = dataBuffer[i ]; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0newBuffer.push(nextBuf ^ MASK[j]); \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0return Buffer.from(newBuffer).toString(); \u00a0\u00a0} \u00a0\u00a0return &#8220;&#8221;; }<\/p><\/blockquote>\n<p><strong>\u521b\u5efa\u5b8c\u00a0parseMessage\u00a0\u51fd\u6570\uff0c\u6211\u4eec\u6765\u66f4\u65b0\u4e00\u4e0b\u4e4b\u524d\u521b\u5efa\u7684 WebSocket \u670d\u52a1\u5668\uff1a<\/strong><\/p>\n<blockquote><p>server.on(&#8220;upgrade&#8221;, function(req, socket) { \u00a0\u00a0socket.on(&#8220;data&#8221;, (buffer) =&gt; { \u00a0\u00a0\u00a0\u00a0const message = parseMessage(buffer); \u00a0\u00a0\u00a0\u00a0if(message) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;Message from client:&#8221;+ message); \u00a0\u00a0\u00a0\u00a0} elseif(message === null) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;WebSocket connection closed by the client.&#8221;); \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0}); \u00a0\u00a0if(req.headers[&#8220;upgrade&#8221;] !== &#8220;websocket&#8221;) { \u00a0\u00a0\u00a0\u00a0socket.end(&#8220;HTTP\/1.1 400 Bad Request&#8221;); \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0\/\/ \u7701\u7565\u5df2\u6709\u4ee3\u7801 });<\/p><\/blockquote>\n<p>\u66f4\u65b0\u5b8c\u6210\u4e4b\u540e\uff0c\u6211\u4eec\u91cd\u65b0\u542f\u52a8\u670d\u52a1\u5668\uff0c\u7136\u540e\u7ee7\u7eed\u4f7f\u7528 \u201c\u53d1\u9001\u666e\u901a\u6587\u672c\u201d \u7684\u793a\u4f8b\u6765\u6d4b\u8bd5\u6d88\u606f\u89e3\u6790\u529f\u80fd\u3002<\/p>\n<p><strong>\u4ee5\u4e0b\u53d1\u9001 \u201c\u6211\u662f\u963f\u5b9d\u54e5\u201d \u6587\u672c\u6d88\u606f\u540e\uff0cWebSocket \u670d\u52a1\u5668\u8f93\u51fa\u7684\u4fe1\u606f\uff1a<\/strong><\/p>\n<blockquote><p>Server running at http:\/\/localhost:8888 isFIN:\u00a0 true use MASK:\u00a0 true payload length:\u00a0 15 Message from client:\u6211\u662f\u963f\u5b9d\u54e5<\/p><\/blockquote>\n<p>\u901a\u8fc7\u89c2\u5bdf\u4ee5\u4e0a\u7684\u8f93\u51fa\u4fe1\u606f\uff0c\u6211\u4eec\u7684 WebSocket \u670d\u52a1\u5668\u5df2\u7ecf\u53ef\u4ee5\u6210\u529f\u89e3\u6790\u5ba2\u6237\u7aef\u53d1\u9001\u5305\u542b\u666e\u901a\u6587\u672c\u7684\u6570\u636e\u5e27\uff0c\u4e0b\u4e00\u6b65\u6211\u4eec\u6765\u5b9e\u73b0\u6d88\u606f\u54cd\u5e94\u7684\u529f\u80fd\u3002<\/p>\n<p><strong><em>5.5.2\uff09\u6d88\u606f\u54cd\u5e94\uff1a<\/em><\/strong><\/p>\n<p>\u8981\u628a\u6570\u636e\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\uff0c\u6211\u4eec\u7684 WebSocket \u670d\u52a1\u5668\u4e5f\u5f97\u6309\u7167 WebSocket \u6570\u636e\u5e27\u7684\u683c\u5f0f\u6765\u5c01\u88c5\u6570\u636e\u3002<\/p>\n<p>\u4e0e\u524d\u9762\u4ecb\u7ecd\u7684\u00a0parseMessage\u00a0\u51fd\u6570\u4e00\u6837\uff0c\u6211\u4e5f\u5c01\u88c5\u4e86\u4e00\u4e2a\u00a0constructReply\u00a0\u51fd\u6570\u7528\u6765\u5c01\u88c5\u8fd4\u56de\u7684\u6570\u636e\u3002<\/p>\n<p><strong>\u8be5\u51fd\u6570\u7684\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/strong><\/p>\n<blockquote><p>function constructReply(data) { \u00a0\u00a0const json = JSON.stringify(data); \u00a0\u00a0const jsonByteLength = Buffer.byteLength(json); \u00a0\u00a0\/\/ \u76ee\u524d\u53ea\u652f\u6301\u5c0f\u4e8e65535\u5b57\u8282\u7684\u8d1f\u8f7d \u00a0\u00a0const lengthByteCount = jsonByteLength &lt; 126 ? 0 : 2; \u00a0\u00a0const payloadLength = lengthByteCount === 0 ? jsonByteLength : 126; \u00a0\u00a0const buffer = Buffer.alloc(2 + lengthByteCount + jsonByteLength); \u00a0\u00a0\/\/ \u8bbe\u7f6e\u6570\u636e\u5e27\u9996\u5b57\u8282\uff0c\u8bbe\u7f6eopcode\u4e3a1\uff0c\u8868\u793a\u6587\u672c\u5e27 \u00a0\u00a0buffer.writeUInt8(0b10000001, 0); \u00a0\u00a0buffer.writeUInt8(payloadLength, 1); \u00a0\u00a0\/\/ \u5982\u679cpayloadLength\u4e3a126\uff0c\u5219\u540e\u9762\u4e24\u4e2a\u5b57\u8282\uff0816\u4f4d\uff09\u5185\u5bb9\u5e94\u8be5\uff0c\u88ab\u8bc6\u522b\u6210\u4e00\u4e2a16\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u8868\u793a\u6570\u636e\u5185\u5bb9\u5927\u5c0f \u00a0\u00a0let payloadOffset = 2; \u00a0\u00a0if(lengthByteCount &gt; 0) { \u00a0\u00a0\u00a0\u00a0buffer.writeUInt16BE(jsonByteLength, 2); \u00a0\u00a0\u00a0\u00a0payloadOffset += lengthByteCount; \u00a0\u00a0} \u00a0\u00a0\/\/ \u628aJSON\u6570\u636e\u5199\u5165\u5230Buffer\u7f13\u51b2\u533a\u4e2d \u00a0\u00a0buffer.write(json, payloadOffset); \u00a0\u00a0return buffer; }<\/p><\/blockquote>\n<p><strong>\u521b\u5efa\u5b8c\u00a0constructReply\u00a0\u51fd\u6570\uff0c\u6211\u4eec\u518d\u6765\u66f4\u65b0\u4e00\u4e0b\u4e4b\u524d\u521b\u5efa\u7684 WebSocket \u670d\u52a1\u5668\uff1a<\/strong><\/p>\n<blockquote><p>server.on(&#8220;upgrade&#8221;, function(req, socket) { \u00a0\u00a0socket.on(&#8220;data&#8221;, (buffer) =&gt; { \u00a0\u00a0\u00a0\u00a0const message = parseMessage(buffer); \u00a0\u00a0\u00a0\u00a0if(message) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;Message from client:&#8221;+ message); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u65b0\u589e\u4ee5\u4e0b&amp;#128071;\u4ee3\u7801 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0socket.write(constructReply({ message })); \u00a0\u00a0\u00a0\u00a0} elseif(message === null) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;WebSocket connection closed by the client.&#8221;); \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0}); });<\/p><\/blockquote>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u7684 WebSocket \u670d\u52a1\u5668\u5df2\u7ecf\u5f00\u53d1\u5b8c\u6210\u4e86\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u6765\u5b8c\u6574\u9a8c\u8bc1\u4e00\u4e0b\u5b83\u7684\u529f\u80fd\u3002<\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/e6c0f08757ec88d0d5b5a73235d57524.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u4ece\u4e0a\u56fe\u4e2d\u53ef\u77e5\uff1a<\/strong>\u4ee5\u4e0a\u5f00\u53d1\u7684\u7b80\u6613\u7248 WebSocket \u670d\u52a1\u5668\u5df2\u7ecf\u53ef\u4ee5\u6b63\u5e38\u5904\u7406\u666e\u901a\u6587\u672c\u6d88\u606f\u4e86\u3002<\/p>\n<p>\u6700\u540e\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5b8c\u6574\u7684\u4ee3\u7801\u3002<\/p>\n<p><strong>custom-websocket-server.js\u6587\u4ef6\uff1a<\/strong><\/p>\n<blockquote><p>const http = require(&#8220;http&#8221;); const port = 8888; const { generateAcceptValue, parseMessage, constructReply } = require(&#8220;.\/util&#8221;); const server = http.createServer((req, res) =&gt; { \u00a0\u00a0res.writeHead(200, { &#8220;Content-Type&#8221;: &#8220;text\/plain; charset=utf-8&#8221;}); \u00a0\u00a0res.end(&#8220;\u5927\u5bb6\u597d\uff0c\u6211\u662f\u963f\u5b9d\u54e5\u3002\u611f\u8c22\u4f60\u9605\u8bfb\u201c\u4f60\u4e0d\u77e5\u9053\u7684WebSocket\u201d&#8221;); }); server.on(&#8220;upgrade&#8221;, function(req, socket) { \u00a0\u00a0socket.on(&#8220;data&#8221;, (buffer) =&gt; { \u00a0\u00a0\u00a0\u00a0const message = parseMessage(buffer); \u00a0\u00a0\u00a0\u00a0if(message) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;Message from client:&#8221;+ message); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0socket.write(constructReply({ message })); \u00a0\u00a0\u00a0\u00a0} else if(message === null) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;WebSocket connection closed by the client.&#8221;); \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0}); \u00a0\u00a0if(req.headers[&#8220;upgrade&#8221;] !== &#8220;websocket&#8221;) { \u00a0\u00a0\u00a0\u00a0socket.end(&#8220;HTTP\/1.1 400 Bad Request&#8221;); \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0\/\/ \u8bfb\u53d6\u5ba2\u6237\u7aef\u63d0\u4f9b\u7684Sec-WebSocket-Key \u00a0\u00a0const secWsKey = req.headers[&#8220;sec-websocket-key&#8221;]; \u00a0\u00a0\/\/ \u4f7f\u7528SHA-1\u7b97\u6cd5\u751f\u6210Sec-WebSocket-Accept \u00a0\u00a0const hash = generateAcceptValue(secWsKey); \u00a0\u00a0\/\/ \u8bbe\u7f6eHTTP\u54cd\u5e94\u5934 \u00a0\u00a0const responseHeaders = [ \u00a0\u00a0\u00a0\u00a0&#8220;HTTP\/1.1 101 Web Socket Protocol Handshake&#8221;, \u00a0\u00a0\u00a0\u00a0&#8220;Upgrade: WebSocket&#8221;, \u00a0\u00a0\u00a0\u00a0&#8220;Connection: Upgrade&#8221;, \u00a0\u00a0\u00a0\u00a0`Sec-WebSocket-Accept: ${hash}`, \u00a0\u00a0]; \u00a0\u00a0\/\/ \u8fd4\u56de\u63e1\u624b\u8bf7\u6c42\u7684\u54cd\u5e94\u4fe1\u606f \u00a0\u00a0socket.write(responseHeaders.join(&#8220;\\r\\n&#8221;) + &#8220;\\r\\n\\r\\n&#8221;); }); server.listen(port, () =&gt; \u00a0\u00a0console.log(`Server running at http:\/\/localhost:${port}`) );<\/p><\/blockquote>\n<p><strong>util.js\u6587\u4ef6\uff1a<\/strong><\/p>\n<blockquote><p>const crypto = require(&#8220;crypto&#8221;); const MAGIC_KEY = &#8220;258EAFA5-E914-47DA-95CA-C5AB0DC85B11&#8221;; function generateAcceptValue(secWsKey) { \u00a0\u00a0return crypto \u00a0\u00a0\u00a0\u00a0.createHash(&#8220;sha1&#8221;) \u00a0\u00a0\u00a0\u00a0.update(secWsKey + MAGIC_KEY, &#8220;utf8&#8221;) \u00a0\u00a0\u00a0\u00a0.digest(&#8220;base64&#8221;); } function parseMessage(buffer) { \u00a0\u00a0\/\/ \u7b2c\u4e00\u4e2a\u5b57\u8282\uff0c\u5305\u542b\u4e86FIN\u4f4d\uff0copcode, \u63a9\u7801\u4f4d \u00a0\u00a0const firstByte = buffer.readUInt8(0); \u00a0\u00a0\/\/ [FIN, RSV, RSV, RSV, OPCODE, OPCODE, OPCODE, OPCODE]; \u00a0\u00a0\/\/ \u53f3\u79fb7\u4f4d\u53d6\u9996\u4f4d\uff0c1\u4f4d\uff0c\u8868\u793a\u662f\u5426\u662f\u6700\u540e\u4e00\u5e27\u6570\u636e \u00a0\u00a0const isFinalFrame = Boolean((firstByte &gt;&gt;&gt; 7) &amp; 0x01); \u00a0\u00a0console.log(&#8220;isFIN: &#8220;, isFinalFrame); \u00a0\u00a0\/\/ \u53d6\u51fa\u64cd\u4f5c\u7801\uff0c\u4f4e\u56db\u4f4d \u00a0\u00a0\/** \u00a0\u00a0\u00a0* %x0\uff1a\u8868\u793a\u4e00\u4e2a\u5ef6\u7eed\u5e27\u3002\u5f53 Opcode \u4e3a 0 \u65f6\uff0c\u8868\u793a\u672c\u6b21\u6570\u636e\u4f20\u8f93\u91c7\u7528\u4e86\u6570\u636e\u5206\u7247\uff0c\u5f53\u524d\u6536\u5230\u7684\u6570\u636e\u5e27\u4e3a\u5176\u4e2d\u4e00\u4e2a\u6570\u636e\u5206\u7247\uff1b \u00a0\u00a0\u00a0* %x1\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u6587\u672c\u5e27\uff08text frame\uff09\uff1b \u00a0\u00a0\u00a0* %x2\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u4e8c\u8fdb\u5236\u5e27\uff08binary frame\uff09\uff1b \u00a0\u00a0\u00a0* %x3-7\uff1a\u4fdd\u7559\u7684\u64cd\u4f5c\u4ee3\u7801\uff0c\u7528\u4e8e\u540e\u7eed\u5b9a\u4e49\u7684\u975e\u63a7\u5236\u5e27\uff1b \u00a0\u00a0\u00a0* %x8\uff1a\u8868\u793a\u8fde\u63a5\u65ad\u5f00\uff1b \u00a0\u00a0\u00a0* %x9\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u5fc3\u8df3\u8bf7\u6c42\uff08ping\uff09\uff1b \u00a0\u00a0\u00a0* %xA\uff1a\u8868\u793a\u8fd9\u662f\u4e00\u4e2a\u5fc3\u8df3\u54cd\u5e94\uff08pong\uff09\uff1b \u00a0\u00a0\u00a0* %xB-F\uff1a\u4fdd\u7559\u7684\u64cd\u4f5c\u4ee3\u7801\uff0c\u7528\u4e8e\u540e\u7eed\u5b9a\u4e49\u7684\u63a7\u5236\u5e27\u3002 \u00a0\u00a0\u00a0*\/ \u00a0\u00a0const opcode = firstByte &amp; 0x0f; \u00a0\u00a0if(opcode === 0x08) { \u00a0\u00a0\u00a0\u00a0\/\/ \u8fde\u63a5\u5173\u95ed \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0if(opcode === 0x02) { \u00a0\u00a0\u00a0\u00a0\/\/ \u4e8c\u8fdb\u5236\u5e27 \u00a0\u00a0\u00a0\u00a0return; \u00a0\u00a0} \u00a0\u00a0if(opcode === 0x01) { \u00a0\u00a0\u00a0\u00a0\/\/ \u76ee\u524d\u53ea\u5904\u7406\u6587\u672c\u5e27 \u00a0\u00a0\u00a0\u00a0let offset = 1; \u00a0\u00a0\u00a0\u00a0const secondByte = buffer.readUInt8(offset); \u00a0\u00a0\u00a0\u00a0\/\/ MASK: 1\u4f4d\uff0c\u8868\u793a\u662f\u5426\u4f7f\u7528\u4e86\u63a9\u7801\uff0c\u5728\u53d1\u9001\u7ed9\u670d\u52a1\u7aef\u7684\u6570\u636e\u5e27\u91cc\u5fc5\u987b\u4f7f\u7528\u63a9\u7801\uff0c\u800c\u670d\u52a1\u7aef\u8fd4\u56de\u65f6\u4e0d\u9700\u8981\u63a9\u7801 \u00a0\u00a0\u00a0\u00a0const useMask = Boolean((secondByte &gt;&gt;&gt; 7) &amp; 0x01); \u00a0\u00a0\u00a0\u00a0console.log(&#8220;use MASK: &#8220;, useMask); \u00a0\u00a0\u00a0\u00a0const payloadLen = secondByte &amp; 0x7f; \/\/ \u4f4e7\u4f4d\u8868\u793a\u8f7d\u8377\u5b57\u8282\u957f\u5ea6 \u00a0\u00a0\u00a0\u00a0offset += 1; \u00a0\u00a0\u00a0\u00a0\/\/ \u56db\u4e2a\u5b57\u8282\u7684\u63a9\u7801 \u00a0\u00a0\u00a0\u00a0let MASK = []; \u00a0\u00a0\u00a0\u00a0\/\/ \u5982\u679c\u8fd9\u4e2a\u503c\u57280-125\u4e4b\u95f4\uff0c\u5219\u540e\u9762\u76844\u4e2a\u5b57\u8282\uff0832\u4f4d\uff09\u5c31\u5e94\u8be5\u88ab\u76f4\u63a5\u8bc6\u522b\u6210\u63a9\u7801\uff1b \u00a0\u00a0\u00a0\u00a0if(payloadLen &lt;= 0x7d) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u8f7d\u8377\u957f\u5ea6\u5c0f\u4e8e125 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MASK = buffer.slice(offset, 4 + offset); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0offset += 4; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;payload length: &#8220;, payloadLen); \u00a0\u00a0\u00a0\u00a0} else if(payloadLen === 0x7e) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u5982\u679c\u8fd9\u4e2a\u503c\u662f126\uff0c\u5219\u540e\u9762\u4e24\u4e2a\u5b57\u8282\uff0816\u4f4d\uff09\u5185\u5bb9\u5e94\u8be5\uff0c\u88ab\u8bc6\u522b\u6210\u4e00\u4e2a16\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u8868\u793a\u6570\u636e\u5185\u5bb9\u5927\u5c0f\uff1b \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0console.log(&#8220;payload length: &#8220;, buffer.readInt16BE(offset)); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u957f\u5ea6\u662f126\uff0c \u5219\u540e\u9762\u4e24\u4e2a\u5b57\u8282\u4f5c\u4e3apayload length\uff0c32\u4f4d\u7684\u63a9\u7801 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MASK = buffer.slice(offset + 2, offset + 2 + 4); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0offset += 6; \u00a0\u00a0\u00a0\u00a0} else{ \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/ \u5982\u679c\u8fd9\u4e2a\u503c\u662f127\uff0c\u5219\u540e\u9762\u76848\u4e2a\u5b57\u8282\uff0864\u4f4d\uff09\u5185\u5bb9\u5e94\u8be5\u88ab\u8bc6\u522b\u6210\u4e00\u4e2a64\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u8868\u793a\u6570\u636e\u5185\u5bb9\u5927\u5c0f \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0MASK = buffer.slice(offset + 8, offset + 8 + 4); \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0offset += 12; \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0\/\/ \u5f00\u59cb\u8bfb\u53d6\u540e\u9762\u7684payload\uff0c\u4e0e\u63a9\u7801\u8ba1\u7b97\uff0c\u5f97\u5230\u539f\u6765\u7684\u5b57\u8282\u5185\u5bb9 \u00a0\u00a0\u00a0\u00a0const newBuffer = []; \u00a0\u00a0\u00a0\u00a0const dataBuffer = buffer.slice(offset); \u00a0\u00a0\u00a0\u00a0for(let i = 0, j = 0; i &lt; dataBuffer.length; i++, j = i % 4) { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0const nextBuf = dataBuffer[i ]; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0newBuffer.push(nextBuf ^ MASK[j]); \u00a0\u00a0\u00a0\u00a0} \u00a0\u00a0\u00a0\u00a0return Buffer.from(newBuffer).toString(); \u00a0\u00a0} \u00a0\u00a0return &#8220;&#8221;; } function constructReply(data) { \u00a0\u00a0const json = JSON.stringify(data); \u00a0\u00a0const jsonByteLength = Buffer.byteLength(json); \u00a0\u00a0\/\/ \u76ee\u524d\u53ea\u652f\u6301\u5c0f\u4e8e65535\u5b57\u8282\u7684\u8d1f\u8f7d \u00a0\u00a0const lengthByteCount = jsonByteLength &lt; 126 ? 0 : 2; \u00a0\u00a0const payloadLength = lengthByteCount === 0 ? jsonByteLength : 126; \u00a0\u00a0const buffer = Buffer.alloc(2 + lengthByteCount + jsonByteLength); \u00a0\u00a0\/\/ \u8bbe\u7f6e\u6570\u636e\u5e27\u9996\u5b57\u8282\uff0c\u8bbe\u7f6eopcode\u4e3a1\uff0c\u8868\u793a\u6587\u672c\u5e27 \u00a0\u00a0buffer.writeUInt8(0b10000001, 0); \u00a0\u00a0buffer.writeUInt8(payloadLength, 1); \u00a0\u00a0\/\/ \u5982\u679cpayloadLength\u4e3a126\uff0c\u5219\u540e\u9762\u4e24\u4e2a\u5b57\u8282\uff0816\u4f4d\uff09\u5185\u5bb9\u5e94\u8be5\uff0c\u88ab\u8bc6\u522b\u6210\u4e00\u4e2a16\u4f4d\u7684\u4e8c\u8fdb\u5236\u6570\u8868\u793a\u6570\u636e\u5185\u5bb9\u5927\u5c0f \u00a0\u00a0let payloadOffset = 2; \u00a0\u00a0if(lengthByteCount &gt; 0) { \u00a0\u00a0\u00a0\u00a0buffer.writeUInt16BE(jsonByteLength, 2); \u00a0\u00a0\u00a0\u00a0payloadOffset += lengthByteCount; \u00a0\u00a0} \u00a0\u00a0\/\/ \u628aJSON\u6570\u636e\u5199\u5165\u5230Buffer\u7f13\u51b2\u533a\u4e2d \u00a0\u00a0buffer.write(json, payloadOffset); \u00a0\u00a0return buffer; } module.exports = { \u00a0\u00a0generateAcceptValue, \u00a0\u00a0parseMessage, \u00a0\u00a0constructReply, };<\/p><\/blockquote>\n<p>\u5176\u5b9e\u670d\u52a1\u5668\u5411\u6d4f\u89c8\u5668\u63a8\u9001\u4fe1\u606f\uff0c\u9664\u4e86\u4f7f\u7528 WebSocket \u6280\u672f\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u00a0SSE\uff08Server-Sent Events\uff09\u3002\u5b83\u8ba9\u670d\u52a1\u5668\u53ef\u4ee5\u5411\u5ba2\u6237\u7aef\u6d41\u5f0f\u53d1\u9001\u6587\u672c\u6d88\u606f\uff0c\u6bd4\u5982\u670d\u52a1\u5668\u4e0a\u751f\u6210\u7684\u5b9e\u65f6\u6d88\u606f\u3002<\/p>\n<p><strong>\u4e3a\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u6807\uff0cSSE \u8bbe\u8ba1\u4e86\u4e24\u4e2a\u7ec4\u4ef6\uff1a<\/strong>\u6d4f\u89c8\u5668\u4e2d\u7684 EventSource API \u548c\u65b0\u7684 \u201c\u4e8b\u4ef6\u6d41\u201d \u6570\u636e\u683c\u5f0f\uff08text\/event-stream\uff09\u3002\u5176\u4e2d\uff0cEventSource \u53ef\u4ee5\u8ba9\u5ba2\u6237\u7aef\u4ee5 DOM \u4e8b\u4ef6\u7684\u5f62\u5f0f\u63a5\u6536\u5230\u670d\u52a1\u5668\u63a8\u9001\u7684\u901a\u77e5\uff0c\u800c\u65b0\u6570\u636e\u683c\u5f0f\u5219\u7528\u4e8e\u4ea4\u4ed8\u6bcf\u4e00\u6b21\u6570\u636e\u66f4\u65b0\u3002<\/p>\n<p><strong>\u5b9e\u9645\u4e0a\uff1a<\/strong>SSE \u63d0\u4f9b\u7684\u662f\u4e00\u4e2a\u9ad8\u6548\u3001\u8de8\u6d4f\u89c8\u5668\u7684 XHR \u6d41\u5b9e\u73b0\uff0c\u6d88\u606f\u4ea4\u4ed8\u53ea\u4f7f\u7528\u4e00\u4e2a\u957f HTTP \u8fde\u63a5\u3002\u7136\u800c\uff0c\u4e0e\u6211\u4eec\u81ea\u5df1\u5b9e\u73b0 XHR \u6d41\u4e0d\u540c\uff0c\u6d4f\u89c8\u5668\u4f1a\u5e2e\u6211\u4eec\u7ba1\u7406\u8fde\u63a5\u3001 \u89e3\u6790\u6d88\u606f\uff0c\u4ece\u800c\u8ba9\u6211\u4eec\u53ea\u5173\u6ce8\u4e1a\u52a1\u903b\u8f91\u3002\u7bc7\u5e45\u6709\u9650\uff0c\u5173\u4e8e SSE \u7684\u66f4\u591a\u7ec6\u8282\uff0c\u5c31\u4e0d\u5c55\u5f00\u4ecb\u7ecd\u4e86\uff0c\u5bf9 SSE \u611f\u5174\u8da3\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u81ea\u884c\u9605\u8bfb\u4ee5\u4e0b\u51e0\u7bc7\uff1a<\/p>\n<ol class=\"ol-level-0\">\n<li>\u300aWeb\u7aef\u5373\u65f6\u901a\u8baf\u6280\u672f\u76d8\u70b9\uff1a\u77ed\u8f6e\u8be2\u3001Comet\u3001Websocket\u3001SSE\u300b<\/li>\n<li>\u300aSSE\u6280\u672f\u8be6\u89e3\uff1a\u4e00\u79cd\u5168\u65b0\u7684HTML5\u670d\u52a1\u5668\u63a8\u9001\u4e8b\u4ef6\u6280\u672f\u300b<\/li>\n<li>\u300a\u4f7f\u7528WebSocket\u548cSSE\u6280\u672f\u5b9e\u73b0Web\u7aef\u6d88\u606f\u63a8\u9001\u300b<\/li>\n<li>\u300a\u8be6\u89e3Web\u7aef\u901a\u4fe1\u65b9\u5f0f\u7684\u6f14\u8fdb\uff1a\u4eceAjax\u3001JSONP \u5230 SSE\u3001Websocket\u300b<\/li>\n<li>\u300a\u7f51\u9875\u7aefIM\u901a\u4fe1\u6280\u672f\u5feb\u901f\u5165\u95e8\uff1a\u77ed\u8f6e\u8be2\u3001\u957f\u8f6e\u8be2\u3001SSE\u3001WebSocket\u300b<\/li>\n<li>\u300a\u641e\u61c2\u73b0\u4ee3Web\u7aef\u5373\u65f6\u901a\u8baf\u6280\u672f\u4e00\u6587\u5c31\u591f\uff1aWebSocket\u3001socket.io\u3001SSE\u300b<\/li>\n<\/ol>\n<h2 id=\"3lfk7\">6\u3001WebSocket\u5b66\u4e60\u8fc7\u7a0b\u4e2d\u7684\u6613\u9519\u5e38\u8bc6<\/h2>\n<h4 id=\"aejdn\">6.1 WebSocket \u4e0e HTTP \u6709\u4ec0\u4e48\u5173\u7cfb\uff1f<\/h4>\n<p>WebSocket \u662f\u4e00\u79cd\u4e0e HTTP \u4e0d\u540c\u7684\u534f\u8bae\u3002\u4e24\u8005\u90fd\u4f4d\u4e8e OSI \u6a21\u578b\u7684\u5e94\u7528\u5c42\uff0c\u5e76\u4e14\u90fd\u4f9d\u8d56\u4e8e\u4f20\u8f93\u5c42\u7684 TCP \u534f\u8bae\u3002<\/p>\n<p><strong>\u867d\u7136\u5b83\u4eec\u4e0d\u540c\uff0c\u4f46\u662f\u00a0RFC 6455\u00a0\u4e2d\u89c4\u5b9a\uff1a<\/strong>WebSocket \u88ab\u8bbe\u8ba1\u4e3a\u5728 HTTP 80 \u548c 443 \u7aef\u53e3\u4e0a\u5de5\u4f5c\uff0c\u5e76\u652f\u6301 HTTP \u4ee3\u7406\u548c\u4e2d\u4ecb\uff0c\u4ece\u800c\u4f7f\u5176\u4e0e HTTP \u534f\u8bae\u517c\u5bb9\u3002 \u4e3a\u4e86\u5b9e\u73b0\u517c\u5bb9\u6027\uff0cWebSocket \u63e1\u624b\u4f7f\u7528 HTTP Upgrade \u5934\uff0c\u4ece HTTP \u534f\u8bae\u66f4\u6539\u4e3a WebSocket \u534f\u8bae\u3002<\/p>\n<p>\u65e2\u7136\u5df2\u7ecf\u63d0\u5230\u4e86 OSI\uff08Open System Interconnection Model\uff09\u6a21\u578b\uff0c\u8fd9\u91cc\u5206\u4eab\u4e00\u5f20\u5f88\u751f\u52a8\u3001\u5f88\u5f62\u8c61\u63cf\u8ff0 OSI \u6a21\u578b\u7684\u793a\u610f\u56fe\uff08\u5982\u4e0b\u56fe\u6240\u793a\uff09\u3002<\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/978fc6104bbecd53ca4c6143991de335.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p>\uff08\u56fe\u7247\u5f15\u7528\u81ea\uff1ahttps:\/\/www.networkingsphere.com\/2019\/07\/what-is-osi-model.html\uff09<\/p>\n<p><strong>\u5f53\u7136\uff0cWebSocket\u4e0eHTTP\u7684\u5173\u7cfb\u663e\u7136\u4e0d\u662f\u8fd9\u4e09\u4e24\u53e5\u8bdd\u53ef\u4ee5\u8bf4\u7684\u6e05\uff0c\u6709\u5174\u8da3\u7684\u8bfb\u8005\u53ef\u4ee5\u8be6\u8bfb\u4e0b\u9762\u8fd9\u4e24\u7bc7\uff1a<\/strong><\/p>\n<ol class=\"ol-level-0\">\n<li>\u300aWebSocket\u8be6\u89e3\uff08\u56db\uff09\uff1a\u5228\u6839\u95ee\u5e95HTTP\u4e0eWebSocket\u7684\u5173\u7cfb(\u4e0a\u7bc7)\u300b<\/li>\n<li>\u300aWebSocket\u8be6\u89e3\uff08\u4e94\uff09\uff1a\u5228\u6839\u95ee\u5e95HTTP\u4e0eWebSocket\u7684\u5173\u7cfb(\u4e0b\u7bc7)\u300b<\/li>\n<\/ol>\n<h4 id=\"372ui\">6.2 WebSocket \u4e0e\u957f\u8f6e\u8be2\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h4>\n<p><strong>\u957f\u8f6e\u8be2\u5c31\u662f\uff1a<\/strong>\u5ba2\u6237\u7aef\u53d1\u8d77\u4e00\u4e2a\u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u6536\u5230\u5ba2\u6237\u7aef\u53d1\u6765\u7684\u8bf7\u6c42\u540e\uff0c\u670d\u52a1\u5668\u7aef\u4e0d\u4f1a\u76f4\u63a5\u8fdb\u884c\u54cd\u5e94\uff0c\u800c\u662f\u5148\u5c06\u8fd9\u4e2a\u8bf7\u6c42\u6302\u8d77\uff0c\u7136\u540e\u5224\u65ad\u8bf7\u6c42\u7684\u6570\u636e\u662f\u5426\u6709\u66f4\u65b0\u3002\u5982\u679c\u6709\u66f4\u65b0\uff0c\u5219\u8fdb\u884c\u54cd\u5e94\uff0c\u5982\u679c\u4e00\u76f4\u6ca1\u6709\u6570\u636e\uff0c\u5219\u7b49\u5f85\u4e00\u5b9a\u7684\u65f6\u95f4\u540e\u624d\u8fd4\u56de\u3002<\/p>\n<p>\u957f\u8f6e\u8be2\u7684\u672c\u8d28\u8fd8\u662f\u57fa\u4e8e HTTP \u534f\u8bae\uff0c\u5b83\u4ecd\u7136\u662f\u4e00\u4e2a\u4e00\u95ee\u4e00\u7b54\uff08\u8bf7\u6c42 \u2014 \u54cd\u5e94\uff09\u7684\u6a21\u5f0f\u3002\u800c WebSocket \u5728\u63e1\u624b\u6210\u529f\u540e\uff0c\u5c31\u662f\u5168\u53cc\u5de5\u7684 TCP \u901a\u9053\uff0c\u6570\u636e\u53ef\u4ee5\u4e3b\u52a8\u4ece\u670d\u52a1\u7aef\u53d1\u9001\u5230\u5ba2\u6237\u7aef\u3002<\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/30a44dfe86747691495ee1b810cf3f80.png\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>\u8981\u7406\u89e3WebSocket \u4e0e\u957f\u8f6e\u8be2\u7684\u533a\u522b\uff0c\u9700\u8981\u6df1\u523b\u7406\u89e3\u957f\u8f6e\u8be2\u7684\u6280\u672f\u539f\u7406\uff0c\u4ee5\u4e0b3\u7bc7\u4e2d\u6709\u5173\u957f\u8f6e\u8be2\u7684\u6280\u672f\u4ecb\u7ecd\u5efa\u8bae\u6df1\u5165\u9605\u8bfb\uff1a<\/strong><\/p>\n<ol class=\"ol-level-0\">\n<li>\u300aComet\u6280\u672f\u8be6\u89e3\uff1a\u57fa\u4e8eHTTP\u957f\u8fde\u63a5\u7684Web\u7aef\u5b9e\u65f6\u901a\u4fe1\u6280\u672f\u300b<\/li>\n<li>\u300a\u65b0\u624b\u5165\u95e8\u8d34\uff1a\u53f2\u4e0a\u6700\u5168Web\u7aef\u5373\u65f6\u901a\u8baf\u6280\u672f\u539f\u7406\u8be6\u89e3\u300b<\/li>\n<li>\u300aWeb\u7aef\u5373\u65f6\u901a\u8baf\u6280\u672f\u76d8\u70b9\uff1a\u77ed\u8f6e\u8be2\u3001Comet\u3001Websocket\u3001SSE\u300b<\/li>\n<li>\u300a\u7f51\u9875\u7aefIM\u901a\u4fe1\u6280\u672f\u5feb\u901f\u5165\u95e8\uff1a\u77ed\u8f6e\u8be2\u3001\u957f\u8f6e\u8be2\u3001SSE\u3001WebSocket\u300b<\/li>\n<\/ol>\n<h4 id=\"5pimh\">6.3 \u4ec0\u4e48\u662f WebSocket \u5fc3\u8df3\uff1f<\/h4>\n<p>\u7f51\u7edc\u4e2d\u7684\u63a5\u6536\u548c\u53d1\u9001\u6570\u636e\u90fd\u662f\u4f7f\u7528 Socket \u8fdb\u884c\u5b9e\u73b0\u3002\u4f46\u662f\u5982\u679c\u6b64\u5957\u63a5\u5b57\u5df2\u7ecf\u65ad\u5f00\uff0c\u90a3\u53d1\u9001\u6570\u636e\u548c\u63a5\u6536\u6570\u636e\u7684\u65f6\u5019\u5c31\u4e00\u5b9a\u4f1a\u6709\u95ee\u9898\u3002<\/p>\n<p><strong>\u53ef\u662f\u5982\u4f55\u5224\u65ad\u8fd9\u4e2a\u5957\u63a5\u5b57\u662f\u5426\u8fd8\u53ef\u4ee5\u4f7f\u7528\u5462\uff1f<\/strong>\u8fd9\u4e2a\u5c31\u9700\u8981\u5728\u7cfb\u7edf\u4e2d\u521b\u5efa\u5fc3\u8df3\u673a\u5236\u3002<\/p>\n<p>\u6240\u8c13 \u201c\u5fc3\u8df3\u201d \u5c31\u662f\u5b9a\u65f6\u53d1\u9001\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u7ed3\u6784\u4f53\uff08\u5fc3\u8df3\u5305\u6216\u5fc3\u8df3\u5e27\uff09\uff0c\u8ba9\u5bf9\u65b9\u77e5\u9053\u81ea\u5df1 \u201c\u5728\u7ebf\u201d\uff0c\u4ee5\u786e\u4fdd\u94fe\u63a5\u7684\u6709\u6548\u6027\u3002<\/p>\n<p>\u800c\u6240\u8c13\u7684\u5fc3\u8df3\u5305\u5c31\u662f\u5ba2\u6237\u7aef\u5b9a\u65f6\u53d1\u9001\u7b80\u5355\u7684\u4fe1\u606f\u7ed9\u670d\u52a1\u5668\u7aef\u544a\u8bc9\u5b83\u6211\u8fd8\u5728\u800c\u5df2\u3002\u4ee3\u7801\u5c31\u662f\u6bcf\u9694\u51e0\u5206\u949f\u53d1\u9001\u4e00\u4e2a\u56fa\u5b9a\u4fe1\u606f\u7ed9\u670d\u52a1\u7aef\uff0c\u670d\u52a1\u7aef\u6536\u5230\u540e\u56de\u590d\u4e00\u4e2a\u56fa\u5b9a\u4fe1\u606f\uff0c\u5982\u679c\u670d\u52a1\u7aef\u51e0\u5206\u949f\u5185\u6ca1\u6709\u6536\u5230\u5ba2\u6237\u7aef\u4fe1\u606f\u5219\u89c6\u5ba2\u6237\u7aef\u65ad\u5f00\u3002<\/p>\n<p><strong>\u5728 WebSocket \u534f\u8bae\u4e2d\u5b9a\u4e49\u4e86 \u5fc3\u8df3 Ping \u548c \u5fc3\u8df3 Pong \u7684\u63a7\u5236\u5e27\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li><em>1\uff09<\/em>\u5fc3\u8df3 Ping \u5e27\u5305\u542b\u7684\u64cd\u4f5c\u7801\u662f 0x9\uff1a\u5982\u679c\u6536\u5230\u4e86\u4e00\u4e2a\u5fc3\u8df3 Ping \u5e27\uff0c\u90a3\u4e48\u7ec8\u7aef\u5fc5\u987b\u53d1\u9001\u4e00\u4e2a\u5fc3\u8df3 Pong \u5e27\u4f5c\u4e3a\u56de\u5e94\uff0c\u9664\u975e\u5df2\u7ecf\u6536\u5230\u4e86\u4e00\u4e2a\u5173\u95ed\u5e27\u3002\u5426\u5219\u7ec8\u7aef\u5e94\u8be5\u5c3d\u5feb\u56de\u590d Pong \u5e27\uff1b<\/li>\n<li><em>2\uff09<\/em>\u5fc3\u8df3 Pong \u5e27\u5305\u542b\u7684\u64cd\u4f5c\u7801\u662f 0xA\uff1a\u4f5c\u4e3a\u56de\u5e94\u53d1\u9001\u7684 Pong \u5e27\u5fc5\u987b\u5b8c\u6574\u643a\u5e26 Ping \u5e27\u4e2d\u4f20\u9012\u8fc7\u6765\u7684 \u201c\u5e94\u7528\u6570\u636e\u201d \u5b57\u6bb5\u3002<\/li>\n<\/ul>\n<p><strong>\u9488\u5bf9\u7b2c2\uff09\u70b9\uff1a<\/strong>\u5982\u679c\u7ec8\u7aef\u6536\u5230\u4e00\u4e2a Ping \u5e27\u4f46\u662f\u6ca1\u6709\u53d1\u9001 Pong \u5e27\u6765\u56de\u5e94\u4e4b\u524d\u7684 Ping \u5e27\uff0c\u90a3\u4e48\u7ec8\u7aef\u53ef\u4ee5\u9009\u62e9\u4ec5\u4e3a\u6700\u8fd1\u5904\u7406\u7684 Ping \u5e27\u53d1\u9001 Pong \u5e27\u3002\u6b64\u5916\uff0c\u53ef\u4ee5\u81ea\u52a8\u53d1\u9001\u4e00\u4e2a Pong \u5e27\uff0c\u8fd9\u7528\u4f5c\u5355\u5411\u5fc3\u8df3\u3002<\/p>\n<p><strong>PS\uff1a<\/strong>\u8fd9\u91cc\u6709\u7bc7WebSocket\u5fc3\u8df3\u65b9\u9762\u7684IM\u5b9e\u6218\u603b\u7ed3\u6587\u7ae0\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u9605\u8bfb\u300aWeb\u7aef\u5373\u65f6\u901a\u8baf\u5b9e\u8df5\u5e72\u8d27\uff1a\u5982\u4f55\u8ba9\u4f60\u7684WebSocket\u65ad\u7f51\u91cd\u8fde\u66f4\u5feb\u901f\uff1f\u300b\u3002<\/p>\n<h4 id=\"9vpph\">6.4 Socket \u662f\u4ec0\u4e48\uff1f<\/h4>\n<p>\u7f51\u7edc\u4e0a\u7684\u4e24\u4e2a\u7a0b\u5e8f\u901a\u8fc7\u4e00\u4e2a\u53cc\u5411\u7684\u901a\u4fe1\u8fde\u63a5\u5b9e\u73b0\u6570\u636e\u7684\u4ea4\u6362\uff0c\u8fd9\u4e2a\u8fde\u63a5\u7684\u4e00\u7aef\u79f0\u4e3a\u4e00\u4e2a Socket\uff08\u5957\u63a5\u5b57\uff09\uff0c\u56e0\u6b64\u5efa\u7acb\u7f51\u7edc\u901a\u4fe1\u8fde\u63a5\u81f3\u5c11\u8981\u4e00\u5bf9\u7aef\u53e3\u53f7\u3002<\/p>\n<p><strong>Socket \u672c\u8d28\uff1a<\/strong>\u662f\u5bf9 TCP\/IP \u534f\u8bae\u6808\u7684\u5c01\u88c5\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9488\u5bf9 TCP \u6216\u8005 <span class=\"mod-overview__keyword\">UDP<\/span> \u7f16\u7a0b\u7684\u63a5\u53e3\uff0c\u5e76\u4e0d\u662f\u53e6\u4e00\u79cd\u534f\u8bae\u3002\u901a\u8fc7 Socket\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 TCP\/IP \u534f\u8bae\u3002<\/p>\n<p><strong>\u767e\u5ea6\u767e\u79d1\u4e0a\u5173\u4e8eSocket\u7684\u63cf\u8ff0\u662f\u8fd9\u6837\uff1a<\/strong><\/p>\n<blockquote><p>Socket \u7684\u82f1\u6587\u539f\u4e49\u662f\u201c\u5b54\u201d\u6216\u201c\u63d2\u5ea7\u201d\uff1a\u4f5c\u4e3a BSD UNIX \u7684\u8fdb\u7a0b\u901a\u4fe1\u673a\u5236\uff0c\u53d6\u540e\u4e00\u79cd\u610f\u601d\u3002\u901a\u5e38\u4e5f\u79f0\u4f5c\u201d\u5957\u63a5\u5b57\u201c\uff0c\u7528\u4e8e\u63cf\u8ff0IP\u5730\u5740\u548c\u7aef\u53e3\uff0c\u662f\u4e00\u4e2a\u901a\u4fe1\u94fe\u7684\u53e5\u67c4\uff0c\u53ef\u4ee5\u7528\u6765\u5b9e\u73b0\u4e0d\u540c<span class=\"mod-overview__keyword\">\u865a\u62df\u673a<\/span>\u6216\u4e0d\u540c\u8ba1\u7b97\u673a\u4e4b\u95f4\u7684\u901a\u4fe1\u3002 \u5728Internet \u4e0a\u7684\u4e3b\u673a\u4e00\u822c\u8fd0\u884c\u4e86\u591a\u4e2a\u670d\u52a1\u8f6f\u4ef6\uff0c\u540c\u65f6\u63d0\u4f9b\u51e0\u79cd\u670d\u52a1\u3002\u6bcf\u79cd\u670d\u52a1\u90fd\u6253\u5f00\u4e00\u4e2aSocket\uff0c\u5e76\u7ed1\u5b9a\u5230\u4e00\u4e2a\u7aef\u53e3\u4e0a\uff0c\u4e0d\u540c\u7684\u7aef\u53e3\u5bf9\u5e94\u4e8e\u4e0d\u540c\u7684\u670d\u52a1\u3002Socket \u6b63\u5982\u5176\u82f1\u6587\u539f\u4e49\u90a3\u6837\uff0c\u50cf\u4e00\u4e2a\u591a\u5b54\u63d2\u5ea7\u3002\u4e00\u53f0\u4e3b\u673a\u72b9\u5982\u5e03\u6ee1\u5404\u79cd\u63d2\u5ea7\u7684\u623f\u95f4\uff0c\u6bcf\u4e2a\u63d2\u5ea7\u6709\u4e00\u4e2a\u7f16\u53f7\uff0c\u6709\u7684\u63d2\u5ea7\u63d0\u4f9b 220 \u4f0f\u4ea4\u6d41\u7535\uff0c \u6709\u7684\u63d0\u4f9b 110 \u4f0f\u4ea4\u6d41\u7535\uff0c\u6709\u7684\u5219\u63d0\u4f9b\u6709\u7ebf\u7535\u89c6\u8282\u76ee\u3002 \u5ba2\u6237\u8f6f\u4ef6\u5c06\u63d2\u5934\u63d2\u5230\u4e0d\u540c\u7f16\u53f7\u7684\u63d2\u5ea7\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u4e0d\u540c\u7684\u670d\u52a1\u3002<\/p><\/blockquote>\n<p><strong>\u5173\u4e8e Socket\uff0c\u53ef\u4ee5\u603b\u7ed3\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/strong><\/p>\n<ul class=\"ul-level-0\">\n<li>1\uff09\u5b83\u53ef\u4ee5\u5b9e\u73b0\u5e95\u5c42\u901a\u4fe1\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u5e94\u7528\u5c42\u90fd\u662f\u901a\u8fc7 socket \u8fdb\u884c\u901a\u4fe1\u7684\uff1b<\/li>\n<li>2\uff09\u5bf9 TCP\/IP \u534f\u8bae\u8fdb\u884c\u5c01\u88c5\uff0c\u4fbf\u4e8e\u5e94\u7528\u5c42\u534f\u8bae\u8c03\u7528\uff0c\u5c5e\u4e8e\u4e8c\u8005\u4e4b\u95f4\u7684\u4e2d\u95f4\u62bd\u8c61\u5c42\uff1b<\/li>\n<li>3\uff09TCP\/IP \u534f\u8bae\u65cf\u4e2d\uff0c\u4f20\u8f93\u5c42\u5b58\u5728\u4e24\u79cd\u901a\u7528\u534f\u8bae: TCP\u3001UDP\uff0c\u4e24\u79cd\u534f\u8bae\u4e0d\u540c\uff0c\u56e0\u4e3a\u4e0d\u540c\u53c2\u6570\u7684 socket \u5b9e\u73b0\u8fc7\u7a0b\u4e5f\u4e0d\u4e00\u6837\u3002<\/li>\n<\/ul>\n<p><strong>\u4e0b\u56fe\u8bf4\u660e\u4e86\u9762\u5411\u8fde\u63a5\u7684\u534f\u8bae\u7684\u5957\u63a5\u5b57 API \u7684\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u5173\u7cfb\uff1a<\/strong><\/p>\n<figure class=\"\">\n<div class=\"rno-markdown-img-url\">\n<div class=\"rno-markdown-img-url-inner\">\n<div><img decoding=\"async\" src=\"https:\/\/ask.qcloudimg.com\/http-save\/1037212\/4fa83e630b5210799050b53abcbcca3c.png\" alt=\"\" \/><\/div>\n<\/div>\n<\/div>\n<\/figure>\n<p>\u200b<\/p>\n<p><strong>PS\uff1a<\/strong>\u8981\u8bf4WebSocket\u548cSocket\u7684\u5173\u7cfb\uff0c\u8fd9\u7bc7\u300aWebSocket\u8be6\u89e3\uff08\u516d\uff09\uff1a\u5228\u6839\u95ee\u5e95WebSocket\u4e0eSocket\u7684\u5173\u7cfb\u300b\u6709\u4e13\u95e8\u8fdb\u884c\u8be6\u7ec6\u5206\u4eab\uff0c\u5efa\u8bae\u9605\u8bfb\u3002\u672c\u6587\u5df2\u540c\u6b65\u53d1\u5e03\u4e8e\uff1ahttp:\/\/www.52im.net\/thread-3713-1-1.html<\/p>\n<h2 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