{"id":8994,"date":"2023-09-22T16:51:06","date_gmt":"2023-09-22T08:51:06","guid":{"rendered":"\/?p=8994"},"modified":"2023-09-22T16:51:06","modified_gmt":"2023-09-22T08:51:06","slug":"%e8%bd%ae%e8%af%a2%e3%80%81sse%e5%92%8cwebsocket","status":"publish","type":"post","link":"\/?p=8994","title":{"rendered":"\u8f6e\u8be2\u3001SSE\u548cwebSocket"},"content":{"rendered":"<blockquote>\n<p>\u8f6e\u8be2\uff08Polling\uff09\u662f\u4e00\u79cd<code>CPU<\/code>\u51b3\u7b56\u5982\u4f55\u63d0\u4f9b\u5468\u8fb9\u8bbe\u5907\u670d\u52a1\u7684\u65b9\u5f0f\uff0c\u53c8\u79f0\u201c\u7a0b\u63a7\u8f93\u5165\u8f93\u51fa\u201d\uff08Programmed I\/O\uff09\u3002\u8f6e\u8be2\u6cd5\u7684\u6982\u5ff5\u662f\uff1a\u7531CPU\u5b9a\u65f6\u53d1\u51fa\u8be2\u95ee\uff0c\u4f9d\u5e8f\u8be2\u95ee\u6bcf\u4e00\u4e2a<code>\u5468\u8fb9\u8bbe\u5907<\/code>\u662f\u5426\u9700\u8981\u5176\u670d\u52a1\uff0c\u6709\u5373\u7ed9\u4e88\u670d\u52a1\uff0c\u670d\u52a1\u7ed3\u675f\u540e\u518d\u95ee\u4e0b\u4e00\u4e2a\u5468\u8fb9\uff0c\u63a5\u7740\u4e0d\u65ad\u5468\u800c\u590d\u59cb\u3002<\/p>\n<\/blockquote>\n<h1>\u77ed\u8f6e\u8be2<\/h1>\n<p>\u77ed\u8f6e\u8be2\u7684\u57fa\u672c\u601d\u8def:<\/p>\n<ul>\n<li>\u6d4f\u89c8\u5668\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5411\u6d4f\u89c8\u5668\u53d1\u9001 http \u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u7aef\u5728\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4e0d\u8bba\u662f\u5426\u6709\u6570\u636e\u66f4\u65b0\uff0c\u90fd\u76f4\u63a5\u8fdb\u884c\u54cd\u5e94\u3002<\/li>\n<li>\u8fd9\u79cd\u65b9\u5f0f\u5b9e\u73b0\u7684\u5373\u65f6\u901a\u4fe1\uff0c\u672c\u8d28\u4e0a\u8fd8\u662f\u6d4f\u89c8\u5668\u53d1\u9001\u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u63a5\u53d7\u8bf7\u6c42\u7684\u4e00\u4e2a\u8fc7\u7a0b\uff0c\u901a\u8fc7\u8ba9\u5ba2\u6237\u7aef\u4e0d\u65ad\u7684\u8fdb\u884c\u8bf7\u6c42\uff0c\u4f7f\u5f97\u5ba2\u6237\u7aef\u80fd\u591f\u6a21\u62df\u5b9e\u65f6\u5730\u6536\u5230\u670d\u52a1\u5668\u7aef\u7684\u6570\u636e\u7684\u53d8\u5316\u3002<\/li>\n<\/ul>\n<p>\u5177\u4f53\u64cd\u4f5c\uff1a\u53ef\u4ee5\u901a\u8fc7\u5b9a\u65f6\u5668\/\u5ef6\u65f6\u5668\u53d1\u8d77http\u8bf7\u6c42<\/p>\n<pre><code>\/\/ \u5b9a\u65f6\u5668\nsetInterval(function() {\n \u00a0 \u00a0axios.request({\n \u00a0 \u00a0 \u00a0 \u00a0url: &#039;\/get_vote&#039;,\n \u00a0 \u00a0 \u00a0 \u00a0method: &#039;get&#039;\n \u00a0  }).then(function (response) {\n \u00a0 \u00a0 \u00a0 \/\/do something\n \u00a0  })\n}, 10000);\n<\/code><\/pre>\n<p>\u4f18\u7f3a\u70b9\ud83d\udc47<\/p>\n<ul>\n<li>\u4f18\u70b9\u662f\u6bd4\u8f83\u7b80\u5355\uff0c\u6613\u4e8e\u7406\u89e3\u3002<\/li>\n<li>\u7f3a\u70b9\u662f\u8fd9\u79cd\u65b9\u5f0f\u7531\u4e8e\u9700\u8981\u4e0d\u65ad\u7684\u5efa\u7acb http \u8fde\u63a5\uff0c\u4e25\u91cd\u6d6a\u8d39\u4e86\u670d\u52a1\u5668\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u8d44\u6e90\u3002\u5f53\u7528\u6237\u589e\u52a0\u65f6\uff0c\u670d\u52a1\u5668\u7aef\u7684\u538b\u529b\u5c31\u4f1a\u53d8\u5927\uff0c\u8fd9\u662f\u5f88\u4e0d\u5408\u7406\u7684\u3002<\/li>\n<\/ul>\n<h1>\u957f\u8f6e\u8be2<\/h1>\n<p>\u957f\u8f6e\u8be2\u7684\u57fa\u672c\u601d\u8def:<\/p>\n<ul>\n<li>\u9996\u5148\u7531\u5ba2\u6237\u7aef\u5411\u670d\u52a1\u5668\u53d1\u8d77\u8bf7\u6c42\uff0c\u5f53\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\u670d\u52a1\u5668\u7aef\u6570\u636e\u662f\u5426\u6709\u66f4\u65b0\u3002<\/li>\n<li>\u5982\u679c\u6709\u66f4\u65b0\uff0c\u5219\u8fdb\u884c\u54cd\u5e94\uff0c\u5982\u679c\u4e00\u76f4\u6ca1\u6709\u6570\u636e\uff0c\u5219\u5230\u8fbe\u4e00\u5b9a\u7684\u65f6\u95f4\u9650\u5236\u624d\u8fd4\u56de\u3002\u5ba2\u6237\u7aef JavaScript \u54cd\u5e94\u5904\u7406\u51fd\u6570\u4f1a\u5728\u5904\u7406\u5b8c\u670d\u52a1\u5668\u8fd4\u56de\u7684\u4fe1\u606f\u540e\uff0c\u518d\u6b21\u53d1\u51fa\u8bf7\u6c42\uff0c\u91cd\u65b0\u5efa\u7acb\u8fde\u63a5\u3002<\/li>\n<\/ul>\n<p>\u5177\u4f53\u5b9e\u73b0\uff1a \u540e\u7aef\u5199sleep(\u79d2) \u7761\u7720\u6302\u8d77\u8bf7\u6c42\uff0c\u5c31\u662f\u628a\u524d\u7aef\u7684\u5b9a\u65f6\u5668\u79fb\u52a8\u5230\u4e86\u540e\u7aef\uff0c \u540e\u7aefwhile\u5faa\u73af\uff0c\u4e0d\u505c\u7684\u95ee\u6570\u636e\u5e93\u6709\u6ca1\u6709\u7ed3\u679c\u3002 \u6ca1\u6709\u8fdb\u5165\u5b9a\u65f6\u7761\u7720\uff0c\u6709\u5219\u8df3\u51fa\u5faa\u73af\u5904\u7406\u903b\u8f91\u3002<\/p>\n<pre><code>\/\/ \u83b7\u53d6\u6700\u65b0\u7684\u6295\u7968\u7ed3\u679c\nfunction getData() {\n \u00a0 \u00a0axios.request({\n \u00a0 \u00a0 \u00a0 \u00a0 method: &quot;get&quot;,\n \u00a0 \u00a0 \u00a0 \u00a0 url: &#039;\u63a5\u53e3\u5730\u5740&#039;,\n \u00a0 \u00a0 }).then(function (data) {\n \u00a0 \u00a0 \u00a0 \/\/do something\n \u00a0 \u00a0 \u00a0 \u00a0if (response.data != &#039;&#039;) {\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u5230\u6700\u65b0\u7684\u6570\u636edo somethings\n \u00a0 \u00a0 \u00a0  }\n \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u83b7\u53d6\u5b8c\u6570\u636e\u540e\uff0c\u518d\u53d1\u9001\u8bf7\u6c42\uff0c\u770b\u8fd8\u6709\u6ca1\u6709\u65b0\u6570\u636e\u751f\u6210\n \u00a0 \u00a0 \u00a0 \u00a0getData()\n \u00a0  })\n}\n<\/code><\/pre>\n<p>\u4f18\u7f3a\u70b9\ud83d\udc47<\/p>\n<ul>\n<li>\u957f\u8f6e\u8be2\u548c\u77ed\u8f6e\u8be2\u6bd4\u8d77\u6765\uff0c\u5b83\u7684\u4f18\u70b9\u662f<strong>\u660e\u663e\u51cf\u5c11\u4e86\u5f88\u591a\u4e0d\u5fc5\u8981\u7684 http \u8bf7\u6c42\u6b21\u6570<\/strong>\uff0c\u76f8\u6bd4\u4e4b\u4e0b\u8282\u7ea6\u4e86\u8d44\u6e90\u3002<\/li>\n<li>\u957f\u8f6e\u8be2\u7684\u7f3a\u70b9\u5728\u4e8e\uff0c\u8fde\u63a5\u6302\u8d77\u4e5f\u4f1a\u5bfc\u81f4\u8d44\u6e90\u7684\u6d6a\u8d39\uff08\u670d\u52a1\u5668\u538b\u529b\u5927\uff0c\u9891\u7e41\u64cd\u4f5c\u8be2\u95ee\u6570\u636e\u5e93\u6709\u6ca1\u6709\u65b0\u7ed3\u679c\uff09<\/li>\n<\/ul>\n<h1>webSocket<\/h1>\n<p>\u7531\u4e8e <code>http<\/code> \u5b58\u5728\u4e00\u4e2a\u660e\u663e\u7684\u5f0a\u7aef\uff08\u6d88\u606f\u53ea\u80fd\u6709\u5ba2\u6237\u7aef\u63a8\u9001\u5230\u670d\u52a1\u5668\u7aef\uff0c\u800c\u670d\u52a1\u5668\u7aef\u4e0d\u80fd\u4e3b\u52a8\u63a8\u9001\u5230\u5ba2\u6237\u7aef\uff09\uff0c\u5bfc\u81f4\u5982\u679c\u670d\u52a1\u5668\u5982\u679c\u6709\u8fde\u7eed\u7684\u53d8\u5316\uff0c\u8fd9\u65f6\u53ea\u80fd\u4f7f\u7528\u8f6e\u8be2\uff0c\u800c\u8f6e\u8be2\u6548\u7387\u8fc7\u4f4e\uff0c\u5e76\u4e0d\u9002\u5408\u3002\u4e8e\u662f <code>WebSocket<\/code>\u88ab\u53d1\u660e\u51fa\u6765<\/p>\n<p><code>WebSocket<\/code> \u662f Html5 \u5b9a\u4e49\u7684\u4e00\u4e2a\u65b0\u534f\u8bae\uff0c\u4e0e\u4f20\u7edf\u7684 http \u534f\u8bae\u4e0d\u540c\uff0c<code>Websocket<\/code> \u662f\u4e00\u4e2a\u6301\u4e45\u5316\u7684\u534f\u8bae\uff0c\u8be5\u534f\u8bae\u5141\u8bb8\u7531\u670d\u52a1\u5668\u4e3b\u52a8\u7684\u5411\u5ba2\u6237\u7aef\u63a8\u9001\u4fe1\u606f\u3002<\/p>\n<p>\u4f7f\u7528 WebSocket \u534f\u8bae\u7684\u7f3a\u70b9\u662f\u5728\u670d\u52a1\u5668\u7aef\u7684\u914d\u7f6e\u6bd4\u8f83\u590d\u6742\u3002WebSocket \u662f\u4e00\u4e2a\u5168\u53cc\u5de5\u7684\u534f\u8bae\uff0c\u4e5f\u5c31\u662f\u901a\u4fe1\u53cc\u65b9\u662f\u5e73\u7b49\u7684\uff0c\u53ef\u4ee5\u76f8\u4e92\u53d1\u9001\u6d88\u606f\u3002<\/p>\n<p><code>websocket<\/code>\u7279\u70b9<\/p>\n<ul>\n<li>\u652f\u6301\u53cc\u5411\u901a\u4fe1\uff0c\u5b9e\u65f6\u6027\u66f4\u5f3a\uff1b<\/li>\n<li>\u53ef\u4ee5\u53d1\u9001\u6587\u672c\uff0c\u4e5f\u53ef\u4ee5\u4e8c\u8fdb\u5236\u6587\u4ef6\uff1b<\/li>\n<li>\u534f\u8bae\u6807\u8bc6\u7b26\u662f <code>ws<\/code>\uff0c\u52a0\u5bc6\u540e\u662f <code>wss<\/code> \uff1b<\/li>\n<li>\u8f83\u5c11\u7684\u63a7\u5236\u5f00\u9500\u3002\u8fde\u63a5\u521b\u5efa\u540e\uff0c<code>ws<\/code>\u5ba2\u6237\u7aef\u3001\u670d\u52a1\u7aef\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u65f6\uff0c\u534f\u8bae\u63a7\u5236\u7684\u6570\u636e\u5305\u5934\u90e8\u8f83\u5c0f\u3002\u5728\u4e0d\u5305\u542b\u5934\u90e8\u7684\u60c5\u51b5\u4e0b\uff0c\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u7684\u5305\u5934\u53ea\u6709<code>2~10<\/code>\u5b57\u8282\uff08\u53d6\u51b3\u4e8e\u6570\u636e\u5305\u957f\u5ea6\uff09\uff0c\u5ba2\u6237\u7aef\u5230\u670d\u52a1\u7aef\u7684\u7684\u8bdd\uff0c\u9700\u8981\u52a0\u4e0a\u989d\u5916\u76844\u5b57\u8282\u7684\u63a9\u7801\u3002\u800c<code>HTTP<\/code>\u534f\u8bae\u6bcf\u6b21\u901a\u4fe1\u90fd\u9700\u8981\u643a\u5e26\u5b8c\u6574\u7684\u5934\u90e8\uff1b<\/li>\n<li>\u652f\u6301\u6269\u5c55\u3002ws\u534f\u8bae\u5b9a\u4e49\u4e86\u6269\u5c55\uff0c\u7528\u6237\u53ef\u4ee5\u6269\u5c55\u534f\u8bae\uff0c\u6216\u8005\u5b9e\u73b0\u81ea\u5b9a\u4e49\u7684\u5b50\u534f\u8bae\u3002\uff08\u6bd4\u5982\u652f\u6301\u81ea\u5b9a\u4e49\u538b\u7f29\u7b97\u6cd5\u7b49\uff09<\/li>\n<li>\u65e0\u8de8\u57df\u95ee\u9898\u3002<\/li>\n<\/ul>\n<p><strong>websocket \u6700\u5927\u7684\u7279\u70b9\u5c31\u662f\u53ef\u4ee5\u53cc\u5411\u901a\u4fe1\u3002<\/strong> \u901a\u4fe1\u53cc\u65b9\u90fd\u53ef\u4ee5\u4e3b\u52a8\u53d1\u9001\u4fe1\u606f\u3002<\/p>\n<blockquote>\n<p>\u5b9e\u73b0\u6bd4\u8f83\u7b80\u5355\uff0c\u670d\u52a1\u7aef\u5e93\u5982 <code>socket.io<\/code>\u3001<code>ws<\/code>\uff0c\u53ef\u4ee5\u5f88\u597d\u7684\u5e2e\u52a9\u6211\u4eec\u5165\u95e8\u3002\u800c\u5ba2\u6237\u7aef\u4e5f\u53ea\u9700\u8981\u53c2\u7167 <code>api<\/code> \u5b9e\u73b0\u5373\u53ef\uff1a<a href=\"https:\/\/link.juejin.cn\/?target=https%3A%2F%2Flinks.jianshu.com%2Fgo%3Fto%3Dhttp%253A%252F%252Fwww.ruanyifeng.com%252Fblog%252F2017%252F05%252Fwebsocket.html\" title=\"https:\/\/links.jianshu.com\/go?to=http%3A%2F%2Fwww.ruanyifeng.com%2Fblog%2F2017%2F05%2Fwebsocket.html\">\u962e\u4e00\u5cf0websocket<\/a><\/p>\n<\/blockquote>\n<p><code>WebSocket<\/code>\u7684\u7528\u6cd5\u793a\u4f8b\uff1a<\/p>\n<pre><code> \u00a0 \u00a0\/\/\u521b\u5efaWebSocket\u7684\u5bf9\u8c61\u3002\u53c2\u6570\u53ef\u4ee5\u662f ws \u6216 wss\uff0c\u540e\u8005\u8868\u793a\u52a0\u5bc6\u3002\n    var ws = new WebSocket(&#039;wss:\/\/echo.websocket.org&#039;);\n \u00a0 \u00a0\/\/\u53d1\u9001\u8bf7\u6c42\n \u00a0 \u00a0ws.onopen = function (evt) {\n \u00a0 \u00a0 \u00a0 \u00a0console.log(&#039;Connection open ...&#039;);\n \u00a0 \u00a0 \u00a0 \u00a0ws.send(&#039;Hello WebSockets!&#039;);\n \u00a0  };\n \u00a0 \u00a0\/\/\u63a5\u6536\u6570\u636e\n \u00a0 \u00a0ws.onmessage = function (evt) {\n \u00a0 \u00a0 \u00a0 \u00a0console.log(&#039;Received Message: &#039;, evt.data);\n \u00a0 \u00a0 \u00a0 \u00a0ws.close();\n \u00a0  };\n \u00a0 \u00a0\/\/\u5173\u95ed\u8fde\u63a5\n \u00a0 \u00a0ws.onclose = function (evt) {\n \u00a0 \u00a0 \u00a0 \u00a0console.log(&#039;Connection closed.&#039;);\n \u00a0  };\n<\/code><\/pre>\n<p><strong>\u9002\u7528\/\u517c\u5bb9\u573a\u666f\uff1a<\/strong><\/p>\n<ul>\n<li><code>FLASH Socket<\/code><\/li>\n<li>\u957f\u8f6e\u8be2\uff1a \u5b9a\u65f6\u53d1\u9001 <code>ajax<\/code><\/li>\n<li><code>long poll<\/code>\uff1a \u53d1\u9001 --&gt; \u6709\u6d88\u606f\u65f6\u518d <code>response<\/code><\/li>\n<\/ul>\n<p><strong>\u5e38\u7528api<\/strong><\/p>\n<ul>\n<li><code>new WebSocket(url)<\/code><\/li>\n<li><code>ws.onerror = fn<\/code><\/li>\n<li><code>ws.onclose = fn<\/code><\/li>\n<li><code>ws.onopen = fn<\/code><\/li>\n<li><code>ws.onmessage = fn<\/code><\/li>\n<li><code>ws.send()<\/code><\/li>\n<\/ul>\n<h1>\u957f\u8fde\u63a5SSE<\/h1>\n<p>SSE\u662fHTML5\u65b0\u589e\u7684\u529f\u80fd\uff0cSSE\uff08sever-sent events\uff09\u670d\u52a1\u5668\u7aef\u63a8\u9001\u4e8b\u4ef6\uff0c\u662f\u6307\u670d\u52a1\u5668\u63a8\u9001\u6570\u636e\u7ed9\u5ba2\u6237\u7aef\uff0c\u800c\u4e0d\u662f\u4f20\u7edf\u7684\u8bf7\u6c42\u54cd\u5e94\u6a21\u5f0f\u3002<\/p>\n<p><code>EventSource<\/code> \u662f\u670d\u52a1\u5668\u63a8\u9001\u7684\u4e00\u4e2a\u7f51\u7edc\u4e8b\u4ef6\u63a5\u53e3\u3002\u4e00\u4e2aEventSource\u5b9e\u4f8b\u4f1a\u5bf9HTTP\u670d\u52a1\u5f00\u542f\u4e00\u4e2a\u6301\u4e45\u5316\u7684\u8fde\u63a5\uff0c\u4ee5<code>text\/event-stream<\/code> \u683c\u5f0f\u53d1\u9001\u4e8b\u4ef6, \u4f1a\u4e00\u76f4\u4fdd\u6301\u5f00\u542f\u76f4\u5230\u88ab\u8981\u6c42\u5173\u95ed\u3002<\/p>\n<p>\u4e0eWebSocket\u4e0d\u540c\u7684\u662f\uff0cSSE\u662f\u670d\u52a1\u7aef\u5355\u5411\u63a8\u9001\u6570\u636e\u5230\u5ba2\u6237\u7aef\u3002\u6570\u636e\u4fe1\u606f\u88ab\u5355\u5411\u4ece\u670d\u52a1\u7aef\u5230\u5ba2\u6237\u7aef\u5206\u53d1\uff0c\u5f53\u4e0d\u9700\u8981\u4ee5\u6d88\u606f\u5f62\u5f0f\u5c06\u6570\u636e\u4ece\u5ba2\u6237\u7aef\u53d1\u9001\u5230\u670d\u52a1\u5668\u65f6\uff0c\u8fd9\u4f7f\u5b83\u4eec\u6210\u4e3a\u7edd\u4f73\u7684\u9009\u62e9\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u5904\u7406\u793e\u4ea4\u5a92\u4f53\u72b6\u6001\u66f4\u65b0\uff0c\u65b0\u95fb\u63d0\u8981\u6216\u5c06\u6570\u636e\u4f20\u9012\u5230\u5ba2\u6237\u7aef\u5b58\u50a8\u673a\u5236\uff08\u5982IndexedDB\u6216Web\u5b58\u50a8\uff09\u4e4b\u7c7b\u7684\uff0cEventSource\u65e0\u7591\u662f\u4e00\u4e2a\u6709\u6548\u65b9\u6848\u3002<\/p>\n<p>\u6ce8\uff1aIE\u4e0d\u652f\u6301<\/p>\n<pre><code>\/\/ \u524d\u7aef\u63a5\u6536\u6570\u636e\u4fe1\u606f\n\/\/ \u52a0\u4e0a\u517c\u5bb9\u5224\u65ad\nif(typeof(EventSource)!==&quot;undefined&quot;){\n \u00a0 \u00a0var source = new EventSource(&#039;\/test\/xx&#039;); \u00a0\/\/\u6307\u5b9a\u8def\u7531\u53d1\u9001\n \u00a0 \u00a0source.onopen = function(e) { \n \u00a0 \u00a0 \u00a0\/\/\u5f53\u8fde\u63a5\u6b63\u5f0f\u5efa\u7acb\u65f6\u89e6\u53d1\n \u00a0 \u00a0 \u00a0console.log(e);\n \u00a0  };\n \u00a0 \u00a0source.onmessage = function(e) { \u00a0\n \u00a0 \u00a0 \u00a0 \u00a0\/\/\u76d1\u542c\u4fe1\u606f\u7684\u4f20\u8f93\n \u00a0 \u00a0 \u00a0 \u00a0var data = JSON.parse(e.data),\n \u00a0 \u00a0 \u00a0 \u00a0origin = e.origin;\n \u00a0 \u00a0 \u00a0 \u00a0console.log(data);\n \u00a0 \u00a0 \u00a0 \u00a0if (!data) {\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\/\/ \u6570\u636e\u4f20\u8f93\u5b8c\u6bd5\uff0c\u65e0\u6570\u636e\u65f6\u5173\u95ed\u8fde\u63a5\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0source.close()\n \u00a0 \u00a0 \u00a0  }\n \u00a0 \u00a0 \u00a0 \/\/data \u00a0 \u670d\u52a1\u5668\u7aef\u4f20\u56de\u7684\u6570\u636e\n \u00a0 \u00a0 \u00a0 \/\/origin\u670d\u52a1\u5668\u7aefURL\u7684\u57df\u540d\u90e8\u5206,\u6709protocol,hostname,port\n \u00a0 \u00a0 \u00a0 \/\/lastEventId\u7528\u6765\u6307\u5b9a\u5f53\u524d\u6570\u636e\u7684\u5e8f\u53f7.\u4e3b\u8981\u7528\u6765\u65ad\u7ebf\u91cd\u8fde\u65f6\u6570\u636e\u7684\u6709\u6548\u6027\n \u00a0  };\n \u00a0 \u00a0source.onerror = function(e) {\n \u00a0 \u00a0 \u00a0 \/\/\u5f53\u8fde\u63a5\u53d1\u751ferror\u65f6\u89e6\u53d1\n \u00a0 \u00a0 \u00a0 \u00a0console.log(e);\n \u00a0  };\n}else{\n \u00a0 \u00a0console.log(&quot;\u4e0d\u652f\u6301SSE&quot;);\n}\n<\/code><\/pre>\n<pre><code>\/\/ \u540e\u7aef\u5355\u5411\u53d1\u9001\u6570\u636e\uff1a\u4ee5nodejs\u4e3a\u4f8b\nres.writeHead(200, {\n \u00a0 \u00a0&quot;Content-Type&quot;: &quot;text\/event-stream&quot;,\n \u00a0 \u00a0&quot;Cache-Control&quot;: &quot;no-cache&quot;,\n \u00a0 \u00a0&quot;Access-Control-Allow-Origin&quot;: &quot;*&quot; \/\/\u5141\u8bb8\u8de8\u57df\n});\nvar num =0;\nfunction sendData(){\n \u00a0 if(num===10){\n \u00a0 \u00a0 \u00a0res.end();\n \u00a0 }else{\n \u00a0 \u00a0res.write(&quot;id: &quot; + num + &quot;\\n&quot;);\n \u00a0 \u00a0res.write(&quot;data: &quot; + num + &quot;\\n\\n&quot;);\n \u00a0 \u00a0num++;\n \u00a0 }\n \u00a0 \/\/ \u5b9a\u65f6\u53d1\u9001\u6570\u636e\n \u00a0 setTimeout(sendData,1000);\n}\nsendData()\n<\/code><\/pre>\n<p><strong>Node\u670d\u52a1\u7aef\u4ee3\u7801\u5b9e\u4f8b<\/strong><\/p>\n<pre><code>const http = require(&#039;http&#039;);\nconst \nSSE = require(&#039;sse&#039;);\n\/\/ \u591a\u4e2a\u5ba2\u6237\u7aef\nvar sseClients = [];\n\/\/ \u914d\u7f6e\u670d\u52a1\nvar server = http.createServer(function(req, res) {\n \u00a0res.writeHead(200, {&#039;Content-Type&#039;: &#039;text\/plain&#039;});\n \u00a0res.end(&#039;okay&#039;);\n});\nserver.listen(8080, &#039;127.0.0.1&#039;, function() {\n \u00a0var sse = new SSE(server, { path: &#039;\/test\/xx&#039;, verifyRequest: (req) =&gt; {\n \u00a0 \u00a0return true;\n  }});\n \u00a0sse.on(&#039;connection&#039;, function(client) {\n \u00a0 \u00a0client.on(&#039;close&#039;, function() {\n \u00a0 \u00a0 \u00a0let index = sseClients.indexOf(client);\n \u00a0 \u00a0 \u00a0if (index &gt; -1) {\n \u00a0 \u00a0 \u00a0 \u00a0sseClients.splice(index, 1);\n \u00a0 \u00a0  }\n \u00a0  });\n \u00a0 \u00a0sseClients.push(client);\n \u00a0 \u00a0client.send(&#039;Hello world&#039;);\n \u00a0 \u00a0client.count = 1;\n \u00a0 \u00a0\/\/ \u5b9a\u65f6\u53d1\u9001\u4fe1\u606f\n \u00a0 \u00a0setInterval(() =&gt; {\n \u00a0 \u00a0 \u00a0sseClients.forEach(function (item, index) {\n \u00a0 \u00a0 \u00a0 \u00a0item.send(`[${sseClients.length}]\u670d\u52a1\u7aef\u63a8\u9001\u7ed9\u5ba2\u6237\u7aef${index} : ${item.count}`);\n \u00a0 \u00a0 \u00a0 \u00a0item.count++;\n \u00a0 \u00a0  });\n \u00a0  }, 1000);\n  });\n});\n<\/code><\/pre>\n<p>\u4f18\u7f3a\u70b9\ud83d\udc47<\/p>\n<ul>\n<li>\u4f18\u70b9\uff1a\u4e0d\u7528\u6bcf\u6b21\u5efa\u7acb\u65b0\u8fde\u63a5\uff0c\u5ef6\u8fdf\u8f83\u4f4e\uff1bSSE\u548cWebSocket\u76f8\u6bd4\uff0c\u6700\u5927\u7684\u4f18\u52bf\u662f\u4fbf\u5229\uff0c\u670d\u52a1\u7aef\u4e0d\u9700\u8981\u5176\u4ed6\u7684\u7c7b\u5e93\uff0c\u5f00\u53d1\u96be\u5ea6\u8f83\u4f4e\u3002<\/li>\n<li>\u7f3a\u70b9\uff1a\u5982\u679c\u5ba2\u6237\u7aef\u6709\u5f88\u591a\uff0c\u90a3\u5c31\u8981\u4fdd\u6301\u5f88\u591a\u957f\u8fde\u63a5\u6d4f\u89c8\u5668\u4e00\u76f4\u8f6c\u5708\uff0c\u8fd9\u4f1a\u5360\u7528\u670d\u52a1\u5668\u5927\u91cf\u5185\u5b58\u548c\u8fde\u63a5\u6570\u3002<\/li>\n<\/ul>\n<p>\u672c\u6587\u8f6c\u81ea <a href=\"https:\/\/juejin.cn\/post\/7086104218259423268\">https:\/\/juejin.cn\/post\/7086104218259423268<\/a>\uff0c\u5982\u6709\u4fb5\u6743\uff0c\u8bf7\u8054\u7cfb\u5220\u9664\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8f6e\u8be2\uff08Polling\uff09\u662f\u4e00\u79cdCPU\u51b3\u7b56\u5982\u4f55\u63d0\u4f9b\u5468\u8fb9\u8bbe\u5907\u670d\u52a1\u7684\u65b9\u5f0f\uff0c\u53c8\u79f0\u201c\u7a0b\u63a7\u8f93\u5165\u8f93\u51fa\u201d\uff08Programmed I\/O\uff09\u3002\u8f6e\u8be2\u6cd5\u7684\u6982\u5ff5\u662f\uff1a   \u2026 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[190],"tags":[],"_links":{"self":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8994"}],"collection":[{"href":"\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8994"}],"version-history":[{"count":1,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8994\/revisions"}],"predecessor-version":[{"id":8995,"href":"\/index.php?rest_route=\/wp\/v2\/posts\/8994\/revisions\/8995"}],"wp:attachment":[{"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8994"},{"taxonomy":"post_tag","embeddable":true,"href":"\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}