{"id":8590,"date":"2021-08-16T09:51:44","date_gmt":"2021-08-16T01:51:44","guid":{"rendered":"https:\/\/sdeno.com\/?p=8590"},"modified":"2025-03-10T15:56:41","modified_gmt":"2025-03-10T07:56:41","slug":"websocket%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=8590","title":{"rendered":"Websocket\u539f\u7406"},"content":{"rendered":"
<\/div>
<\/div><\/div><\/div>\"https:\/\/sdeno.com\/wp-content\/uploads\/2019\/10\/web_20250310154453-1024x470.jpg\"<\/figure>\n

WebSocket \u662f\u4e00\u79cd\u5728\u5355\u4e2a TCP \u8fde\u63a5\u4e0a\u8fdb\u884c\u5168\u53cc\u5de5\u901a\u4fe1\u7684\u534f\u8bae\uff0c\u5b83\u5141\u8bb8\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u8fdb\u884c\u5b9e\u65f6\u3001\u53cc\u5411\u7684\u6570\u636e\u4f20\u8f93\u3002\u4ee5\u4e0b\u662f WebSocket \u7684\u5b9e\u73b0\u539f\u7406\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u4fdd\u6301\u5fc3\u8df3\u7684\u8be6\u7ec6\u8bf4\u660e\uff1a<\/p>\n

WebSocket \u7684\u5b9e\u73b0\u539f\u7406<\/strong><\/h3>\n
    \n
  1. \u63e1\u624b\u9636\u6bb5<\/strong>\uff1a\n
      \n
    • WebSocket \u8fde\u63a5\u59cb\u4e8e\u4e00\u4e2a HTTP \u63e1\u624b\u8bf7\u6c42\u3002\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2a\u5e26\u6709\u00a0Upgrade: websocket<\/code>\u00a0\u548c\u00a0Connection: Upgrade<\/code>\u00a0\u5934\u7684 HTTP \u8bf7\u6c42\u3002<\/li>\n
    • \u670d\u52a1\u5668\u5982\u679c\u652f\u6301 WebSocket\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2a HTTP 101 \u72b6\u6001\u7801\uff08Switching Protocols\uff09\uff0c\u8868\u793a\u534f\u8bae\u5347\u7ea7\u6210\u529f\u3002<\/li>\n
    • \u63e1\u624b\u8fc7\u7a0b\u4e2d\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4f1a\u4ea4\u6362\u4e00\u4e9b\u5bc6\u94a5\uff08\u5982\u00a0Sec-WebSocket-Key<\/code>\u00a0\u548c\u00a0Sec-WebSocket-Accept<\/code>\uff09\uff0c\u7528\u4e8e\u9a8c\u8bc1\u8fde\u63a5\u7684\u5408\u6cd5\u6027\u3002<\/li>\n<\/ul>\n<\/li>\n
    • \u6570\u636e\u4f20\u8f93\u9636\u6bb5<\/strong>\uff1a\n
        \n
      • \u63e1\u624b\u5b8c\u6210\u540e\uff0c\u8fde\u63a5\u4ece HTTP \u534f\u8bae\u5347\u7ea7\u4e3a WebSocket \u534f\u8bae\u3002<\/li>\n
      • WebSocket \u4f7f\u7528\u5e27\uff08Frame\uff09\u6765\u4f20\u8f93\u6570\u636e\u3002\u5e27\u5206\u4e3a\u63a7\u5236\u5e27\uff08\u5982 Ping\/Pong\uff09\u548c\u6570\u636e\u5e27\uff08\u5982\u6587\u672c\u6216\u4e8c\u8fdb\u5236\u6570\u636e\uff09\u3002<\/li>\n
      • \u6570\u636e\u5e27\u53ef\u4ee5\u5206\u7247\u4f20\u8f93\uff0c\u9002\u5408\u4f20\u8f93\u5927\u5757\u6570\u636e\u3002<\/li>\n<\/ul>\n<\/li>\n
      • \u8fde\u63a5\u5173\u95ed<\/strong>\uff1a\n
          \n
        • \u5ba2\u6237\u7aef\u6216\u670d\u52a1\u5668\u53ef\u4ee5\u4e3b\u52a8\u53d1\u9001\u5173\u95ed\u5e27\uff08Close Frame\uff09\u6765\u7ec8\u6b62\u8fde\u63a5\u3002<\/li>\n
        • \u5173\u95ed\u65f6\uff0c\u53cc\u65b9\u4f1a\u4ea4\u6362\u5173\u95ed\u72b6\u6001\u7801\u548c\u539f\u56e0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

          <\/h3>\n

          \u5982\u4f55\u5904\u7406\u4fdd\u6301\u5fc3\u8df3<\/strong><\/h3>\n

          WebSocket \u8fde\u63a5\u53ef\u80fd\u4f1a\u56e0\u4e3a\u7f51\u7edc\u95ee\u9898\u6216\u957f\u65f6\u95f4\u6ca1\u6709\u6570\u636e\u4f20\u8f93\u800c\u88ab\u65ad\u5f00\u3002\u4e3a\u4e86\u4fdd\u6301\u8fde\u63a5\u7684\u6d3b\u8dc3\u6027\uff0c\u901a\u5e38\u9700\u8981\u5b9e\u73b0\u5fc3\u8df3\u673a\u5236\u3002<\/p>\n

          \u5fc3\u8df3\u673a\u5236\u7684\u539f\u7406<\/strong><\/h4>\n

          \u5fc3\u8df3\u673a\u5236\u662f\u901a\u8fc7\u5b9a\u671f\u53d1\u9001 Ping \u5e27\u548c\u63a5\u6536 Pong \u5e27\u6765\u68c0\u6d4b\u8fde\u63a5\u662f\u5426\u4ecd\u7136\u6709\u6548\u3002<\/p>\n

            \n
          1. Ping \u5e27<\/strong>\uff1a\n
              \n
            • \u5ba2\u6237\u7aef\u6216\u670d\u52a1\u5668\u53ef\u4ee5\u5b9a\u671f\u53d1\u9001 Ping \u5e27\uff08\u63a7\u5236\u5e27\u7684\u4e00\u79cd\uff09\u3002<\/li>\n
            • Ping \u5e27\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u5305\uff0c\u7528\u4e8e\u68c0\u6d4b\u5bf9\u65b9\u662f\u5426\u4ecd\u7136\u5728\u7ebf\u3002<\/li>\n<\/ul>\n<\/li>\n
            • Pong \u5e27<\/strong>\uff1a\n
                \n
              • \u5f53\u63a5\u6536\u5230 Ping \u5e27\u65f6\uff0c\u63a5\u6536\u65b9\u5fc5\u987b\u56de\u590d\u4e00\u4e2a Pong \u5e27\u3002<\/li>\n
              • Pong \u5e27\u662f\u5bf9 Ping \u5e27\u7684\u54cd\u5e94\uff0c\u8868\u793a\u8fde\u63a5\u4ecd\u7136\u6709\u6548\u3002<\/li>\n<\/ul>\n<\/li>\n
              • \u8d85\u65f6\u68c0\u6d4b<\/strong>\uff1a\n
                  \n
                • \u5982\u679c\u53d1\u9001 Ping \u5e27\u540e\uff0c\u5728\u6307\u5b9a\u65f6\u95f4\u5185\u6ca1\u6709\u6536\u5230 Pong \u5e27\uff0c\u53ef\u4ee5\u8ba4\u4e3a\u8fde\u63a5\u5df2\u65ad\u5f00\u3002<\/li>\n
                • \u6b64\u65f6\u53ef\u4ee5\u4e3b\u52a8\u5173\u95ed\u8fde\u63a5\u5e76\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n

                  <\/h4>\n

                  \u5b9e\u73b0\u5fc3\u8df3\u673a\u5236\u7684\u6b65\u9aa4<\/strong><\/h4>\n
                    \n
                  1. \u5ba2\u6237\u7aef\u5b9e\u73b0<\/strong>\uff1a\n
                      \n
                    • \u4f7f\u7528\u00a0setInterval<\/code>\u00a0\u5b9a\u671f\u5411\u670d\u52a1\u5668\u53d1\u9001 Ping \u5e27\u3002<\/li>\n
                    • \u76d1\u542c\u670d\u52a1\u5668\u7684 Pong \u5e27\u54cd\u5e94\u3002<\/li>\n
                    • \u5982\u679c\u8d85\u65f6\u672a\u6536\u5230 Pong \u5e27\uff0c\u5173\u95ed\u8fde\u63a5\u5e76\u91cd\u8fde\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
                      const ws = new WebSocket('ws:\/\/example.com');\r\nlet pingInterval;\r\n\r\nws.onopen = () => {\r\n    console.log('WebSocket connected');\r\n    \/\/ \u6bcf\u9694 30 \u79d2\u53d1\u9001\u4e00\u6b21 Ping\r\n    pingInterval = setInterval(() => {\r\n        if (ws.readyState === WebSocket.OPEN) {\r\n            ws.send(JSON.stringify({ type: 'ping' }));\r\n        }\r\n    }, 30000);\r\n};\r\n\r\nws.onmessage = (event) => {\r\n    const data = JSON.parse(event.data);\r\n    if (data.type === 'pong') {\r\n        console.log('Received pong');\r\n    }\r\n};\r\n\r\nws.onclose = () => {\r\n    console.log('WebSocket disconnected');\r\n    clearInterval(pingInterval);\r\n};<\/pre>\n
                      2\uff0c\u670d\u52a1\u5668\u5b9e\u73b0\uff1a<\/p>\n
                      \u76d1\u542c\u5ba2\u6237\u7aef\u7684 Ping \u5e27\uff0c\u5e76\u56de\u590d Pong \u5e27\u3002<\/p>\n
                      \u5982\u679c\u957f\u65f6\u95f4\u672a\u6536\u5230\u5ba2\u6237\u7aef\u7684\u6d88\u606f\uff0c\u53ef\u4ee5\u4e3b\u52a8\u5173\u95ed\u8fde\u63a5\u3002<\/p>\n
                      const WebSocket = require('ws');\r\nconst wss = new WebSocket.Server({ port: 8080 });\r\n\r\nwss.on('connection', (ws) => {\r\n    console.log('Client connected');\r\n    let timeout;\r\n\r\n    const heartbeat = () => {\r\n        clearTimeout(timeout);\r\n        \/\/ \u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\uff0c\u4f8b\u5982 60 \u79d2\r\n        timeout = setTimeout(() => {\r\n            ws.terminate();\r\n        }, 60000);\r\n    };\r\n\r\n    ws.on('message', (message) => {\r\n        const data = JSON.parse(message);\r\n        if (data.type === 'ping') {\r\n            ws.send(JSON.stringify({ type: 'pong' }));\r\n        }\r\n        heartbeat();\r\n    });\r\n\r\n    ws.on('close', () => {\r\n        console.log('Client disconnected');\r\n        clearTimeout(timeout);\r\n    });\r\n});<\/pre>\n
                       <\/p>\n
                      \u603b\u7ed3<\/strong><\/h3>\n
                        \n
                      • WebSocket \u901a\u8fc7 HTTP \u63e1\u624b\u5347\u7ea7\u534f\u8bae\uff0c\u5b9e\u73b0\u5168\u53cc\u5de5\u901a\u4fe1\u3002<\/li>\n
                      • \u5fc3\u8df3\u673a\u5236\u901a\u8fc7\u5b9a\u671f\u53d1\u9001 Ping\/Pong \u5e27\u6765\u68c0\u6d4b\u8fde\u63a5\u72b6\u6001\uff0c\u907f\u514d\u56e0\u8d85\u65f6\u65ad\u5f00\u3002<\/li>\n
                      • \u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u90fd\u9700\u8981\u5b9e\u73b0\u5fc3\u8df3\u903b\u8f91\uff0c\u4ee5\u786e\u4fdd\u8fde\u63a5\u7684\u7a33\u5b9a\u6027\u3002<\/li>\n<\/ul>\n
                        ——————-\u4ee5\u4e0aai\u7684\u7b54\u6848—————–<\/p>\n
                         <\/p>\n
                        \u4e00\u3001websocket\u4e0ehttp<\/h2>\n
                        WebSocket\u662fHTML5\u51fa\u7684\u4e1c\u897f\uff08\u534f\u8bae\uff09\uff0c\u4e5f\u5c31\u662f\u8bf4HTTP\u534f\u8bae\u6ca1\u6709\u53d8\u5316\uff0c\u6216\u8005\u8bf4\u6ca1\u5173\u7cfb\uff0c\u4f46HTTP\u662f\u4e0d\u652f\u6301\u6301\u4e45\u8fde\u63a5\u7684\uff08\u957f\u8fde\u63a5\uff0c\u5faa\u73af\u8fde\u63a5\u7684\u4e0d\u7b97\uff09<\/p>\n
                        \u9996\u5148HTTP\u6709\u00a01.1<\/code>\u00a0\u548c\u00a01.0<\/code>\u00a0\u4e4b\u8bf4\uff0c\u4e5f\u5c31\u662f\u6240\u8c13\u7684\u00a0keep-alive<\/code>\u00a0\uff0c\u628a\u591a\u4e2aHTTP\u8bf7\u6c42\u5408\u5e76\u4e3a\u4e00\u4e2a\uff0c\u4f46\u662f\u00a0Websocket<\/code>\u00a0\u5176\u5b9e\u662f\u4e00\u4e2a\u65b0\u534f\u8bae\uff0c\u8ddfHTTP\u534f\u8bae\u57fa\u672c\u6ca1\u6709\u5173\u7cfb\uff0c\u53ea\u662f\u4e3a\u4e86\u517c\u5bb9\u73b0\u6709\u6d4f\u89c8\u5668\u7684\u63e1\u624b\u89c4\u8303\u800c\u5df2\uff0c\u4e5f\u5c31\u662f\u8bf4\u5b83\u662fHTTP\u534f\u8bae\u4e0a\u7684\u4e00\u79cd\u8865\u5145\u53ef\u4ee5\u901a\u8fc7\u8fd9\u6837\u4e00\u5f20\u56fe\u7406\u89e3<\/p>\n
                        <\/div>
                        <\/div><\/div><\/div>\"https:\/\/sdeno.com\/wp-content\/uploads\/2021\/08\/iE3yuqA-1.png\"<\/figure>\n
                        \u6709\u4ea4\u96c6\uff0c\u4f46\u662f\u5e76\u4e0d\u662f\u5168\u90e8\u3002<\/p>\n
                        \u53e6\u5916Html5\u662f\u6307\u7684\u4e00\u7cfb\u5217\u65b0\u7684API\uff0c\u6216\u8005\u8bf4\u65b0\u89c4\u8303\uff0c\u65b0\u6280\u672f\u3002Http\u534f\u8bae\u672c\u8eab\u53ea\u67091.0\u548c1.1\uff0c\u800c\u4e14\u8ddfHtml\u672c\u8eab\u6ca1\u6709\u76f4\u63a5\u5173\u7cfb\u3002\u3002\u901a\u4fd7\u6765\u8bf4\uff0c\u4f60\u53ef\u4ee5\u7528HTTP\u534f\u8bae\u4f20\u8f93\u975eHtml\u6570\u636e\uff0c\u5c31\u662f\u8fd9\u6837=\u3002=<\/p>\n
                        \u518d\u7b80\u5355\u6765\u8bf4\uff0c\u5c42\u7ea7\u4e0d\u4e00\u6837\u3002<\/p>\n
                         <\/p>\n
                        \u4e8c\u3001Websocket\u662f\u4ec0\u4e48\u6837\u7684\u534f\u8bae\uff0c\u5177\u4f53\u6709\u4ec0\u4e48\u4f18\u70b9<\/h2>\n
                        \u9996\u5148\uff0cWebsocket\u662f\u4e00\u4e2a\u6301\u4e45\u5316\u7684\u534f\u8bae\uff0c\u76f8\u5bf9\u4e8eHTTP\u8fd9\u79cd\u975e\u6301\u4e45\u7684\u534f\u8bae\u6765\u8bf4\u3002\u7b80\u5355\u7684\u4e3e\u4e2a\u4f8b\u5b50\u5427\uff0c\u7528\u76ee\u524d\u5e94\u7528\u6bd4\u8f83\u5e7f\u6cdb\u7684PHP\u751f\u547d\u5468\u671f\u6765\u89e3\u91ca\u3002<\/p>\n
                        HTTP\u7684\u751f\u547d\u5468\u671f\u901a\u8fc7\u00a0Request<\/code>\u00a0\u6765\u754c\u5b9a\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u00a0Request<\/code>\u00a0\u4e00\u4e2a\u00a0Response<\/code>\u00a0\uff0c\u90a3\u4e48\u5728\u00a0HTTP1.0<\/code>\u00a0\u4e2d\uff0c\u8fd9\u6b21HTTP\u8bf7\u6c42\u5c31\u7ed3\u675f\u4e86\u3002<\/p>\n
                        \u5728HTTP1.1\u4e2d\u8fdb\u884c\u4e86\u6539\u8fdb\uff0c\u4f7f\u5f97\u6709\u4e00\u4e2akeep-alive\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4e00\u4e2aHTTP\u8fde\u63a5\u4e2d\uff0c\u53ef\u4ee5\u53d1\u9001\u591a\u4e2aRequest\uff0c\u63a5\u6536\u591a\u4e2aResponse\u3002\u4f46\u662f\u8bf7\u8bb0\u4f4f\u00a0Request = Response<\/code>\u00a0\uff0c \u5728HTTP\u4e2d\u6c38\u8fdc\u662f\u8fd9\u6837\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e00\u4e2arequest\u53ea\u80fd\u6709\u4e00\u4e2aresponse\u3002\u800c\u4e14\u8fd9\u4e2aresponse\u4e5f\u662f\u88ab\u52a8\u7684\uff0c\u4e0d\u80fd\u4e3b\u52a8\u53d1\u8d77\u3002<\/p>\n
                        \u6559\u7ec3\uff0c\u4f60BB\u4e86\u8fd9\u4e48\u591a\uff0c\u8ddfWebsocket\u6709\u4ec0\u4e48\u5173\u7cfb\u5462\uff1f_(:\u0437\u300d\u2220)_\u597d\u5427\uff0c\u6211\u6b63\u51c6\u5907\u8bf4Websocket\u5462\u3002\u3002<\/p>\n
                        \u9996\u5148Websocket\u662f\u57fa\u4e8eHTTP\u534f\u8bae\u7684\uff0c\u6216\u8005\u8bf4\u501f\u7528\u4e86HTTP\u7684\u534f\u8bae\u6765\u5b8c\u6210\u4e00\u90e8\u5206\u63e1\u624b\u3002<\/p>\n
                        \u9996\u5148\u6211\u4eec\u6765\u770b\u4e2a\u5178\u578b\u7684\u00a0Websocket<\/code>\u00a0\u63e1\u624b\uff08\u501f\u7528Wikipedia\u7684\u3002\u3002\uff09<\/p>\n
                        GET \/chat HTTP\/1.1\r\nHost: server.example.com\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==\r\nSec-WebSocket-Protocol: chat, superchat\r\nSec-WebSocket-Version: 13\r\nOrigin: http:\/\/example.com<\/span><\/span><\/span><\/pre>\n
                        \u719f\u6089HTTP\u7684\u7ae5\u978b\u53ef\u80fd\u53d1\u73b0\u4e86\uff0c\u8fd9\u6bb5\u7c7b\u4f3cHTTP\u534f\u8bae\u7684\u63e1\u624b\u8bf7\u6c42\u4e2d\uff0c\u591a\u4e86\u51e0\u4e2a\u4e1c\u897f\u3002\u6211\u4f1a\u987a\u4fbf\u8bb2\u89e3\u4e0b\u4f5c\u7528\u3002<\/p>\n
                        Upgrade: websocket\r\nConnection: Upgrade<\/span><\/pre>\n
                        \u8fd9\u4e2a\u5c31\u662fWebsocket\u7684\u6838\u5fc3\u4e86\uff0c\u544a\u8bc9\u00a0Apache<\/code>\u00a0\u3001\u00a0Nginx<\/code>\u00a0\u7b49\u670d\u52a1\u5668\uff1a\u6ce8\u610f\u5566\uff0c\u6211\u53d1\u8d77\u7684\u662fWebsocket\u534f\u8bae\uff0c\u5feb\u70b9\u5e2e\u6211\u627e\u5230\u5bf9\u5e94\u7684\u52a9\u7406\u5904\u7406~\u4e0d\u662f\u90a3\u4e2a\u8001\u571f\u7684HTTP\u3002<\/p>\n
                        Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw==\r\nSec-WebSocket-Protocol: chat, superchat\r\nSec-WebSocket-Version: 13<\/span><\/pre>\n
                        \u9996\u5148\uff0c\u00a0Sec-WebSocket-Key<\/code>\u00a0\u662f\u4e00\u4e2a\u00a0Base64 encode<\/code>\u00a0\u7684\u503c\uff0c\u8fd9\u4e2a\u662f\u6d4f\u89c8\u5668\u968f\u673a\u751f\u6210\u7684\uff0c\u544a\u8bc9\u670d\u52a1\u5668\uff1a\u6ce5\u7164\uff0c\u4e0d\u8981\u5ffd\u60a0\u7a9d\uff0c\u6211\u8981\u9a8c\u8bc1\u5c3c\u662f\u4e0d\u662f\u771f\u7684\u662fWebsocket\u52a9\u7406\u3002<\/p>\n
                        \u7136\u540e\uff0c\u00a0Sec_WebSocket-Protocol<\/code>\u00a0\u662f\u4e00\u4e2a\u7528\u6237\u5b9a\u4e49\u7684\u5b57\u7b26\u4e32\uff0c\u7528\u6765\u533a\u5206\u540cURL\u4e0b\uff0c\u4e0d\u540c\u7684\u670d\u52a1\u6240\u9700\u8981\u7684\u534f\u8bae\u3002\u7b80\u5355\u7406\u89e3\uff1a\u4eca\u665a\u6211\u8981\u670d\u52a1A\uff0c\u522b\u641e\u9519\u5566~<\/p>\n
                        \u6700\u540e\uff0c\u00a0Sec-WebSocket-Version<\/code>\u00a0\u662f\u544a\u8bc9\u670d\u52a1\u5668\u6240\u4f7f\u7528\u7684\u00a0Websocket Draft<\/code>\u00a0\uff08\u534f\u8bae\u7248\u672c\uff09\uff0c\u5728\u6700\u521d\u7684\u65f6\u5019\uff0cWebsocket\u534f\u8bae\u8fd8\u5728\u00a0Draft<\/code>\u00a0\u9636\u6bb5\uff0c\u5404\u79cd\u5947\u5947\u602a\u602a\u7684\u534f\u8bae\u90fd\u6709\uff0c\u800c\u4e14\u8fd8\u6709\u5f88\u591a\u671f\u5947\u5947\u602a\u602a\u4e0d\u540c\u7684\u4e1c\u897f\uff0c\u4ec0\u4e48Firefox\u548cChrome\u7528\u7684\u4e0d\u662f\u4e00\u4e2a\u7248\u672c\u4e4b\u7c7b\u7684\uff0c\u5f53\u521dWebsocket\u534f\u8bae\u592a\u591a\u53ef\u662f\u4e00\u4e2a\u5927\u96be\u9898\u3002\u3002\u4e0d\u8fc7\u73b0\u5728\u8fd8\u597d\uff0c\u5df2\u7ecf\u5b9a\u4e0b\u6765\u5566~\u5927\u5bb6\u90fd\u4f7f\u7528\u7684\u4e00\u4e2a\u4e1c\u897f~ \u8131\u6c34\uff1a\u00a0\u670d\u52a1\u5458\uff0c\u6211\u8981\u7684\u662f13\u5c81\u7684\u5662\u2192_\u2192<\/strong><\/p>\n
                        \u7136\u540e\u670d\u52a1\u5668\u4f1a\u8fd4\u56de\u4e0b\u5217\u4e1c\u897f\uff0c\u8868\u793a\u5df2\u7ecf\u63a5\u53d7\u5230\u8bf7\u6c42\uff0c \u6210\u529f\u5efa\u7acbWebsocket\u5566\uff01<\/p>\n
                        HTTP\/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: HSmrc0sMlYUkAGmm5OPpG2HaGWk=\r\nSec-WebSocket-Protocol: chat<\/span><\/span><\/pre>\n
                        \u8fd9\u91cc\u5f00\u59cb\u5c31\u662fHTTP\u6700\u540e\u8d1f\u8d23\u7684\u533a\u57df\u4e86\uff0c\u544a\u8bc9\u5ba2\u6237\uff0c\u6211\u5df2\u7ecf\u6210\u529f\u5207\u6362\u534f\u8bae\u5566~<\/p>\n
                        Upgrade: websocket\r\nConnection: Upgrade<\/span><\/pre>\n
                        \u4f9d\u7136\u662f\u56fa\u5b9a\u7684\uff0c\u544a\u8bc9\u5ba2\u6237\u7aef\u5373\u5c06\u5347\u7ea7\u7684\u662f\u00a0Websocket<\/code>\u00a0\u534f\u8bae\uff0c\u800c\u4e0d\u662fmozillasocket\uff0clurnarsocket\u6216\u8005shitsocket\u3002<\/p>\n
                        \u7136\u540e\uff0c\u00a0Sec-WebSocket-Accept<\/code>\u00a0\u8fd9\u4e2a\u5219\u662f\u7ecf\u8fc7\u670d\u52a1\u5668\u786e\u8ba4\uff0c\u5e76\u4e14\u52a0\u5bc6\u8fc7\u540e\u7684\u00a0Sec-WebSocket-Key<\/code>\u3002\u00a0\u670d\u52a1\u5668\uff1a\u597d\u5566\u597d\u5566\uff0c\u77e5\u9053\u5566\uff0c\u7ed9\u4f60\u770b\u6211\u7684ID CARD\u6765\u8bc1\u660e\u884c\u4e86\u5427\u3002\u3002<\/p>\n
                        \u540e\u9762\u7684\uff0c\u00a0Sec-WebSocket-Protocol<\/code>\u00a0\u5219\u662f\u8868\u793a\u6700\u7ec8\u4f7f\u7528\u7684\u534f\u8bae\u3002<\/p>\n
                        \u81f3\u6b64\uff0cHTTP\u5df2\u7ecf\u5b8c\u6210\u5b83\u6240\u6709\u5de5\u4f5c\u4e86\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u5b8c\u5168\u6309\u7167Websocket\u534f\u8bae\u8fdb\u884c\u4e86\u3002\u5177\u4f53\u7684\u534f\u8bae\u5c31\u4e0d\u5728\u8fd9\u9610\u8ff0\u4e86\u3002<\/p>\n
                        \u2014\u2014\u2014\u2014\u2014\u2014\u6280\u672f\u89e3\u6790\u90e8\u5206\u5b8c\u6bd5\u2014\u2014\u2014\u2014\u2014\u2014<\/p>\n
                        <\/div>
                        <\/div><\/div><\/div>\"https:\/\/sdeno.com\/wp-content\/uploads\/2021\/08\/yQJFRva.jpg\"<\/figure>\n
                        \u4f60TMD\u53c8BBB\u4e86\u8fd9\u4e48\u4e45\uff0c\u90a3\u5230\u5e95Websocket\u6709\u4ec0\u4e48\u9b3c\u7528\uff0c\u00a0http long poll<\/code>\u00a0\uff0c\u6216\u8005\u00a0ajax\u8f6e\u8be2<\/code>\u00a0\u4e0d\u90fd\u53ef\u4ee5\u5b9e\u73b0\u5b9e\u65f6\u4fe1\u606f\u4f20\u9012\u4e48\u3002<\/p>\n
                        <\/div>
                        <\/div><\/div><\/div>\"https:\/\/sdeno.com\/wp-content\/uploads\/2021\/08\/2yIRbun.jpg\"<\/figure>\n
                        \u597d\u597d\u597d\uff0c\u5e74\u8f7b\u4eba\uff0c\u90a3\u6211\u4eec\u6765\u8bb2\u4e00\u8bb2Websocket\u6709\u4ec0\u4e48\u7528\u3002\u6765\u7ed9\u4f60\u5403\u70b9\u80e1\uff08\u82cf\uff09\u841d\uff08\u4e39\uff09\u535c\uff08\u7ea2\uff09<\/p>\n
                        <\/div>
                        <\/div><\/div><\/div>\"https:\/\/sdeno.com\/wp-content\/uploads\/2021\/08\/nIV7RbE.jpg\"<\/figure>\n
                         <\/p>\n
                        \u4e09\u3001Websocket\u7684\u4f5c\u7528<\/h2>\n
                        \u5728\u8bb2Websocket\u4e4b\u524d\uff0c\u6211\u5c31\u987a\u5e26\u7740\u8bb2\u4e0b\u00a0long poll<\/code>\u00a0\u548c\u00a0ajax\u8f6e\u8be2<\/code>\u00a0\u7684\u539f\u7406\u3002<\/p>\n
                        ajax\u8f6e\u8be2<\/h3>\n
                        ajax\u8f6e\u8be2\u7684\u539f\u7406\u975e\u5e38\u7b80\u5355\uff0c\u8ba9\u6d4f\u89c8\u5668\u9694\u4e2a\u51e0\u79d2\u5c31\u53d1\u9001\u4e00\u6b21\u8bf7\u6c42\uff0c\u8be2\u95ee\u670d\u52a1\u5668\u662f\u5426\u6709\u65b0\u4fe1\u606f\u3002<\/p>\n
                        \n
                        \n
                        \u573a\u666f\u518d\u73b0\uff1a<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u4fe1\u606f(Request)<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u6ca1\u6709\uff08Response\uff09<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u4fe1\u606f(Request)<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u6ca1\u6709\u3002\u3002\uff08Response\uff09<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u4fe1\u606f(Request)<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u4f60\u597d\u70e6\u554a\uff0c\u6ca1\u6709\u554a\u3002\u3002\uff08Response\uff09<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u6d88\u606f\uff08Request\uff09<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u597d\u5566\u597d\u5566\uff0c\u6709\u5566\u7ed9\u4f60\u3002\uff08Response\uff09<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u6d88\u606f\uff08Request\uff09<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u3002\u3002\u3002\u3002\u3002\u6ca1\u3002\u3002\u3002\u3002\u6ca1\u3002\u3002\u3002\u6ca1\u6709\uff08Response\uff09 \u2014- loop<\/p>\n<\/div>\n<\/div>\n
                        long poll<\/h3>\n
                        long poll<\/code>\u00a0\u5176\u5b9e\u539f\u7406\u8ddf\u00a0ajax\u8f6e\u8be2<\/code>\u00a0\u5dee\u4e0d\u591a\uff0c\u90fd\u662f\u91c7\u7528\u8f6e\u8be2\u7684\u65b9\u5f0f\uff0c\u4e0d\u8fc7\u91c7\u53d6\u7684\u662f\u963b\u585e\u6a21\u578b\uff08\u4e00\u76f4\u6253\u7535\u8bdd\uff0c\u6ca1\u6536\u5230\u5c31\u4e0d\u6302\u7535\u8bdd\uff09\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5ba2\u6237\u7aef\u53d1\u8d77\u8fde\u63a5\u540e\uff0c\u5982\u679c\u6ca1\u6d88\u606f\uff0c\u5c31\u4e00\u76f4\u4e0d\u8fd4\u56deResponse\u7ed9\u5ba2\u6237\u7aef\u3002\u76f4\u5230\u6709\u6d88\u606f\u624d\u8fd4\u56de\uff0c\u8fd4\u56de\u5b8c\u4e4b\u540e\uff0c\u5ba2\u6237\u7aef\u518d\u6b21\u5efa\u7acb\u8fde\u63a5\uff0c\u5468\u800c\u590d\u59cb\u3002<\/p>\n
                        \n
                        \n
                        \u573a\u666f\u518d\u73b0\uff1a<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u4fe1\u606f\uff0c\u6ca1\u6709\u7684\u8bdd\u5c31\u7b49\u6709\u4e86\u624d\u8fd4\u56de\u7ed9\u6211\u5427\uff08Request\uff09<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u989d\u3002\u3002 \u7b49\u5f85\u5230\u6709\u6d88\u606f\u7684\u65f6\u5019\u3002\u3002\u6765 \u7ed9\u4f60\uff08Response\uff09<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\uff0c\u6709\u6ca1\u6709\u65b0\u4fe1\u606f\uff0c\u6ca1\u6709\u7684\u8bdd\u5c31\u7b49\u6709\u4e86\u624d\u8fd4\u56de\u7ed9\u6211\u5427\uff08Request\uff09 -loop<\/p>\n<\/div>\n<\/div>\n
                        \u4ece\u4e0a\u9762\u53ef\u4ee5\u770b\u51fa\u5176\u5b9e\u8fd9\u4e24\u79cd\u65b9\u5f0f\uff0c\u90fd\u662f\u5728\u4e0d\u65ad\u5730\u5efa\u7acbHTTP\u8fde\u63a5\uff0c\u7136\u540e\u7b49\u5f85\u670d\u52a1\u7aef\u5904\u7406\uff0c\u53ef\u4ee5\u4f53\u73b0HTTP\u534f\u8bae\u7684\u53e6\u5916\u4e00\u4e2a\u7279\u70b9\uff0c\u88ab\u52a8\u6027\u3002<\/p>\n
                        \u4f55\u4e3a\u88ab\u52a8\u6027\u5462\uff0c\u5176\u5b9e\u5c31\u662f\uff0c\u670d\u52a1\u7aef\u4e0d\u80fd\u4e3b\u52a8\u8054\u7cfb\u5ba2\u6237\u7aef\uff0c\u53ea\u80fd\u6709\u5ba2\u6237\u7aef\u53d1\u8d77\u3002<\/p>\n
                        \u7b80\u5355\u5730\u8bf4\u5c31\u662f\uff0c\u670d\u52a1\u5668\u662f\u4e00\u4e2a\u5f88\u61d2\u7684\u51b0\u7bb1\uff08\u8fd9\u662f\u4e2a\u6897\uff09\uff08\u4e0d\u4f1a\u3001\u4e0d\u80fd\u4e3b\u52a8\u53d1\u8d77\u8fde\u63a5\uff09\uff0c\u4f46\u662f\u4e0a\u53f8\u6709\u547d\u4ee4\uff0c\u5982\u679c\u6709\u5ba2\u6237\u6765\uff0c\u4e0d\u7ba1\u591a\u4e48\u7d2f\u90fd\u8981\u597d\u597d\u63a5\u5f85\u3002<\/p>\n
                        \u8bf4\u5b8c\u8fd9\u4e2a\uff0c\u6211\u4eec\u518d\u6765\u8bf4\u4e00\u8bf4\u4e0a\u9762\u7684\u7f3a\u9677\uff08\u539f\u8c05\u6211\u5e9f\u8bdd\u8fd9\u4e48\u591a\u5427OAQ\uff09<\/p>\n
                        \u4ece\u4e0a\u9762\u5f88\u5bb9\u6613\u770b\u51fa\u6765\uff0c\u4e0d\u7ba1\u600e\u4e48\u6837\uff0c\u4e0a\u9762\u8fd9\u4e24\u79cd\u90fd\u662f\u975e\u5e38\u6d88\u8017\u8d44\u6e90\u7684\u3002<\/p>\n
                        ajax\u8f6e\u8be2 \u9700\u8981\u670d\u52a1\u5668\u6709\u5f88\u5feb\u7684\u5904\u7406\u901f\u5ea6\u548c\u8d44\u6e90\u3002\uff08\u901f\u5ea6\uff09long poll \u9700\u8981\u6709\u5f88\u9ad8\u7684\u5e76\u53d1\uff0c\u4e5f\u5c31\u662f\u8bf4\u540c\u65f6\u63a5\u5f85\u5ba2\u6237\u7684\u80fd\u529b\u3002\uff08\u573a\u5730\u5927\u5c0f\uff09<\/p>\n
                        \u6240\u4ee5\u00a0ajax\u8f6e\u8be2<\/code>\u00a0\u548c\u00a0long poll<\/code>\u00a0\u90fd\u6709\u53ef\u80fd\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n
                        \n
                        \n
                        \u5ba2\u6237\u7aef\uff1a\u5566\u5566\u5566\u5566\uff0c\u6709\u65b0\u4fe1\u606f\u4e48\uff1f<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u6708\u7ebf\u6b63\u5fd9\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\uff08503 Server Unavailable\uff09<\/p>\n
                        \u5ba2\u6237\u7aef\uff1a\u3002\u3002\u3002\u3002\u597d\u5427\uff0c\u5566\u5566\u5566\uff0c\u6709\u65b0\u4fe1\u606f\u4e48\uff1f<\/p>\n
                        \u670d\u52a1\u7aef\uff1a\u6708\u7ebf\u6b63\u5fd9\uff0c\u8bf7\u7a0d\u540e\u518d\u8bd5\uff08503 Server Unavailable\uff09<\/p>\n<\/div>\n
                        \u5ba2\u6237\u7aef\uff1a\u7136\u540e\u670d\u52a1\u7aef\u5728\u4e00\u65c1\u5fd9\u7684\u8981\u6b7b\uff1a\u51b0\u7bb1\uff0c\u6211\u8981\u66f4\u591a\u7684\u51b0\u7bb1\uff01\u66f4\u591a\u3002\u3002\u66f4\u591a\u3002\u3002\uff08\u6211\u9519\u4e86\u3002\u3002\u8fd9\u53c8\u662f\u6897\u3002\u3002\uff09<\/p>\n<\/div>\n
                        \u8a00\u5f52\u6b63\u4f20\uff0c\u6211\u4eec\u6765\u8bf4Websocket\u5427<\/h3>\n
                        \n
                        \u901a\u8fc7\u4e0a\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u8fd9\u4e24\u79cd\u65b9\u5f0f\u90fd\u4e0d\u662f\u6700\u597d\u7684\u65b9\u5f0f\uff0c\u9700\u8981\u5f88\u591a\u8d44\u6e90\u3002<\/p>\n
                        \u4e00\u79cd\u9700\u8981\u66f4\u5feb\u7684\u901f\u5ea6\uff0c\u4e00\u79cd\u9700\u8981\u66f4\u591a\u7684\u2019\u7535\u8bdd\u2019\u3002\u8fd9\u4e24\u79cd\u90fd\u4f1a\u5bfc\u81f4\u2019\u7535\u8bdd\u2019\u7684\u9700\u6c42\u8d8a\u6765\u8d8a\u9ad8\u3002<\/p>\n
                        \u54e6\u5bf9\u4e86\uff0c\u5fd8\u8bb0\u8bf4\u4e86HTTP\u8fd8\u662f\u4e00\u4e2a\u72b6\u6001\u534f\u8bae\u3002<\/p>\n
                        \u901a\u4fd7\u7684\u8bf4\u5c31\u662f\uff0c\u670d\u52a1\u5668\u56e0\u4e3a\u6bcf\u5929\u8981\u63a5\u5f85\u592a\u591a\u5ba2\u6237\u4e86\uff0c\u662f\u4e2a\u5065\u5fd8\u9b3c\uff0c\u4f60\u4e00\u6302\u7535\u8bdd\uff0c\u4ed6\u5c31\u628a\u4f60\u7684\u4e1c\u897f\u5168\u5fd8\u5149\u4e86\uff0c\u628a\u4f60\u7684\u4e1c\u897f\u5168\u4e22\u6389\u4e86\u3002\u4f60\u7b2c\u4e8c\u6b21\u8fd8\u5f97\u518d\u544a\u8bc9\u670d\u52a1\u5668\u4e00\u904d\u3002<\/p>\n<\/div>\n
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                        \n
                        \n
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                        \u5ba2\u6237\u7aef\uff1a\u9ebb\u70e6\u4f60\u6709\u4fe1\u606f\u7684\u65f6\u5019\u63a8\u9001\u7ed9\u6211\u5662\u3002\u3002<\/p>\n
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                        \u670d\u52a1\u7aef\uff1abalabalabalabala<\/p>\n
                        \u670d\u52a1\u7aef\uff1abalabalabalabala<\/p>\n
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                        \u4f46\u662fWebsocket\u53ea\u9700\u8981\u4e00\u6b21HTTP\u63e1\u624b\uff0c\u6240\u4ee5\u8bf4\u6574\u4e2a\u901a\u8baf\u8fc7\u7a0b\u662f\u5efa\u7acb\u5728\u4e00\u6b21\u8fde\u63a5\/\u72b6\u6001\u4e2d\uff0c\u4e5f\u5c31\u907f\u514d\u4e86HTTP\u7684\u975e\u72b6\u6001\u6027\uff0c\u670d\u52a1\u7aef\u4f1a\u4e00\u76f4\u77e5\u9053\u4f60\u7684\u4fe1\u606f\uff0c\u76f4\u5230\u4f60\u5173\u95ed\u8bf7\u6c42\uff0c\u8fd9\u6837\u5c31\u89e3\u51b3\u4e86\u63a5\u7ebf\u5458\u8981\u53cd\u590d\u89e3\u6790HTTP\u534f\u8bae\uff0c\u8fd8\u8981\u67e5\u770bidentity info\u7684\u4fe1\u606f\u3002<\/p>\n
                        \n
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                         <\/p>\n
                        \u2014\u2014\u2014\u2014\u2014\u2014\u2013<\/p>\n
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