\u4e00\u76f4\u4ee5\u6765\uff0cHTTP\u534f\u8bae\u90fd\u662f\u4e25\u683c\u9075\u5faaRequest-Response\u6a21\u578b\u7684\u3002\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2aRequest\u5230\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u5bf9Request\u4f5c\u51fa\u54cd\u5e94\u5e76\u5c06Response\u53d1\u9001\u56de\u5ba2\u6237\u7aef\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6240\u6709\u7684\u4e92\u52a8\u90fd\u662f\u7531\u5ba2\u6237\u7aef\u53d1\u8d77\u7684\uff0c\u670d\u52a1\u5668\u4e0d\u4f1a\u53d1\u8d77\u4efb\u4f55\u4e92\u52a8\u3002
\u4e3a\u4e86\u521b\u5efa\u4e92\u52a8\u6027\u66f4\u5f3a\u7684web\u5e94\u7528\u7a0b\u5e8f\uff0cAJAX\u51fa\u73b0\u4e86\uff0cAJAX\u5b9e\u73b0\u4e86\u4e00\u4e2a\u52a8\u6001\u7684\u4eceServer\u83b7\u53d6\u6570\u636e\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u4f7f\u7528AJAX\uff0c\u6d4f\u89c8\u5668\u901a\u8fc7XMLHttpRequest API\u6765\u53d1\u9001HTTP request\u3002XMLHttpRequest\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u5728\u4e0d\u963b\u585e\u7528\u6237\u754c\u9762\u7684\u60c5\u51b5\u4e0b\u5411\u670d\u52a1\u5668\u53d1\u9001\u5f02\u6b65\u7684HTTP request\u6765\u83b7\u53d6\u6570\u636e\u3002\u4f46\u662fAJAX\u5e76\u6ca1\u6709\u5b9a\u4e49\u65b0\u7684HTTP request\u7c7b\u578b\uff0c\u53ea\u662f\u5c06\u53d1\u9001HTTP request\u7684\u5de5\u4f5c\u79fb\u5230\u4e86\u540e\u53f0\uff0c\u4e0d\u5f71\u54cd\u7528\u6237\u7684\u64cd\u4f5c\u3002\u56e0\u6b64AJAX\u4e5f\u6ca1\u6709\u6253\u7834Request-Response\u7684\u6a21\u578b\uff0c\u8fd8\u662f\u7531\u6d4f\u89c8\u5668\u4ece\u670d\u52a1\u5668‘\u62c9’\u6570\u636e\u3002<\/p>\n
\u53e6\u5916\u4e00\u79cd\u6280\u672f\u662fComet\uff0c\u4e5f\u79f0\u4e3a\u53cd\u5411Ajax\u3002\u548cAjax\u4e00\u6837\uff0cComet\u4e5f\u662f\u5efa\u7acb\u5728\u5df2\u7ecf\u5b58\u5728\u7684HTTP\u534f\u8bae\u4e4b\u4e0a\u7684\u3002Comet\u4f1a\u7ef4\u62a4\u4e00\u4e2a\u957f\u671f\u5b58\u6d3b\u7684HTTP\u8fde\u63a5\uff0c\u53d1\u9001‘\u5047’\u7684\u8bf7\u6c42\u4ece\u800c\u5f97\u5230response\u3002 <html> <head> <script type=\\\\\\’text\/javascript\\\\\\’> var source = new EventSource(\\\\\\’Events\\\\\\’); source.onmessage = function (event) { ev = document.getElementById(\\\\\\’events\\\\\\’); ev.innerHTML = "<br>[in] " event.data; }; <\/script> <\/head> <body> <div id="events"><\/div> <\/body> <\/html><\/p>\n EventSource\u4ee3\u8868\u7684\u662f\u63a5\u6536\u4e8b\u4ef6\u7684\u5ba2\u6237\u7aef\u7684\u7ec8\u70b9\u3002\u5ba2\u6237\u7aef\u901a\u8fc7\u521b\u5efaEventSource\u5bf9\u8c61\u6765\u6253\u5f00\u4e00\u4e2aevent stream\u3002\u521b\u5efaEventSource\u5bf9\u8c61\u65f6\uff0c\u8be5\u5bf9\u8c61\u63a5\u6536\u4e00\u4e2a\u4e8b\u4ef6\u6765\u6e90\u7684URL\u4f5c\u4e3a\u5176\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\u3002\u5f53\u6bcf\u6b21\u6536\u5230\u65b0\u7684\u4e8b\u4ef6\u6570\u636e\u65f6onmessage\u4e8b\u4ef6\u5904\u7406\u5668\u4f1a\u88ab\u8c03\u7528\u3002 GET \/Events HTTP\/1.1 Host: myServer:8875 User-Agent: Mozilla\/5.0 (Windows; U; Windows NT 5.1; de-DE) AppleWebKit\/532 (KHTML, like Gecko) Version\/4.0.4 Safari\/531.21.10 Accept-Encoding: gzip, deflate Referer: http:\/\/myServer:8875\/ Accept: text\/event-stream Last-Event-Id: 6 Accept-Language: de-DE Cache-Control: no-cache Connection: keep-alive<\/p>\n Accept\u5b9a\u4e49\u4e86\u9700\u8981\u7684\u683c\u5f0f text\/event-stream\u3002 \u867d\u7136Server-Sent Events\u89c4\u8303\u5b9a\u4e49\u4e86text\/event-stream\u7684MIME \u7c7b\u578b\uff0c\u8be5\u89c4\u8303\u540c\u65f6\u5141\u8bb8\u4f7f\u7528\u5176\u4ed6\u7684\u4e8b\u4ef6\u6846\u67b6\u683c\u5f0f\u3002\u4f46\u662fServer-Sent Events\u7684\u5b9e\u73b0\u5fc5\u987b\u652f\u6301test\/event-stream\u683c\u5f0f\u3002 HTTP\/1.1 200 OK<\/p>\n Server: xLightweb\/2.12-HTML5Preview6<\/p>\n Content-Type: text\/event-stream<\/p>\n Expires: Fri, 01 Jan 1990 00:00:00 GMT<\/p>\n Cache-Control: no-cache, no-store, max-age=0, must-revalidate<\/p>\n Pragma: no-cache<\/p>\n Connection: close<\/p>\n : time stream<\/p>\n retry: 5000<\/p>\n id: 7<\/p>\n data: Thu Mar 11 07:31:30 CET 2010<\/p>\n id: 8<\/p>\n data: Thu Mar 11 07:31:35 CET 2010<\/p>\n […]<\/p>\n \u6839\u636e\u5b9a\u4e49\uff0cEvent stream\u4e0d\u5e94\u8be5\u88ab\u7f13\u5b58\u3002\u4e3a\u4e86\u907f\u514d\u7f13\u5b58\uff0c\u5728Response\u7684\u5934\u4e2d\u5305\u542b\u4e86Cache-Control\uff0c\u7981\u6b62\u4e86\u7f13\u5b58\u8be5response\u3002 class ServerHandler implements IHttpRequestHandler { private final Timer timer = new Timer(false); public void onRequest(IHttpExchange exchange) throws IOException { String requestURI = exchange.getRequest().getRequestURI(); if (requestURI.equals("\/ServerSentEventExample")) { sendServerSendPage(exchange, requestURI); } else if (requestURI.equals("\/Events")) { sendEventStream(exchange); } else { exchange.sendError(404); } } private void sendServerSendPage(IHttpExchange exchange, String uri) throws IOException { String page = "<html>rn " " <head>rn" " <script type=\\\\\\’text\/javascript\\\\\\’>rn" " var source = new EventSource(\\\\\\’Events\\\\\\’);rn" " source.onmessage = function (event) {rn" " ev = document.getElementById(\\\\\\’events\\\\\\’);rn" " ev.innerHTML = "<br>[in] " event.data;rn" " };rn" " <\/script>rn" " <\/head>rn" " <body>rn" " <div id="events"><\/div>rn" " <\/body>rn" "<\/html>rn "; exchange.send(new HttpResponse(200, "text\/html", page)); } private void sendEventStream(final IHttpExchange exchange) throws IOException { \/\/ get the last id string final String idString = exchange.getRequest().getHeader( "Last-Event-Id", "0"); \/\/ sending the response header final BodyDataSink sink = exchange.send(new HttpResponseHeader(200, "text\/event-stream")); TimerTask tt = new TimerTask() { private int id = Integer.parseInt(idString); public void run() { try { Event event = new Event(new Date().toString(), id); sink.write(event.toString()); } catch (IOException ioe) { cancel(); sink.destroy(); } }; }; Event event = new Event(); event.setRetryMillis(5 * 1000); event.setComment("time stream"); sink.write(event.toString()); timer.schedule(tt, 3000, 3000); } } XHttpServer server = new XHttpServer(8875, new ServerHandler()); server.start();<\/p>\n Server-Sent Events\u89c4\u8303\u63a8\u8350\u5982\u679c\u6ca1\u6709\u5176\u4ed6\u7684\u6570\u636e\u8981\u53d1\u9001\uff0c\u90a3\u4e48\u5b9a\u671f\u7684\u53d1\u9001keep-alive\u6ce8\u91ca\u3002\u8fd9\u6837\u4ee3\u7406\u670d\u52a1\u5668\u5c31\u53ef\u4ee5\u5728\u67d0\u4e2aHTTP\u8fde\u63a5\u6709\u4e00\u6bb5\u65f6\u95f4\u4e0d\u6d3b\u8dc3\u65f6\u5173\u95ed\u8be5\u8fde\u63a5\uff0c\u8fd9\u6837\u4ee3\u7406\u670d\u52a1\u5668\u80fd\u591f\u5173\u95ed\u7a7a\u95f2\u7684\u8fde\u63a5\u6765\u907f\u514d\u6d6a\u8d39\u8fde\u63a5\u5728\u6ca1\u6709\u54cd\u5e94\u7684HTTP\u670d\u52a1\u5668\u4e0a\u3002\u53d1\u9001\u6ce8\u91ca\u4e8b\u4ef6\u4f7f\u5f97\u8fd9\u79cd\u673a\u5236\u4e0d\u4f1a\u53d1\u751f\u5728\u6709\u6548\u7684\u8fde\u63a5\u4e0a\u3002\u5c3d\u7ba1EventSource\u4f1a\u81ea\u52a8\u91cd\u5efa\u8fde\u63a5\uff0c\u4f46\u662f\u53d1\u9001\u6ce8\u91ca\u4e8b\u4ef6\u8fd8\u662f\u80fd\u591f\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u91cd\u65b0\u8fde\u63a5\u3002 \u66f4\u591a\u5173\u4e8e\u4e91\u670d\u52a1\u5668\uff0c\u57df\u540d<\/a><\/span>\u6ce8\u518c\uff0c\u865a\u62df\u4e3b\u673a\u7684\u95ee\u9898\uff0c\u8bf7\u8bbf\u95ee\u57a6\u6d3e\u79d1\u6280<\/a><\/span>\u5b98\u7f51\uff1awww.kenpai.com<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":" \u4e00\u76f4\u4ee5\u6765\uff0cHTTP\u534f\u8bae\u90fd\u662f\u4e25\u683c\u9075\u5faaRequest-Response\u6a21\u578b\u7684\u3002\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2aRequest\u5230\u670d\u52a1\u5668\uff0c\u670d\u52a1\u5668\u5bf9Request\u4f5c\u51fa\u54cd\u5e94\u5e76\u5c06Res<\/p>\n","protected":false},"author":2,"featured_media":4349,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3322],"tags":[3889],"class_list":["post-5021","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ktougao","tag-html-html51-server-sent-events"],"_links":{"self":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/posts\/5021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/comments?post=5021"}],"version-history":[{"count":0,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/posts\/5021\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/media\/4349"}],"wp:attachment":[{"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/media?parent=5021"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/categories?post=5021"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kenpai.com\/cms\/wp-json\/wp\/v2\/tags?post=5021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\u8fd9\u4e9b\u90fd\u662f\u4e3a\u4e86\u6253\u7834HTTP\u534f\u8bae\u7684\u9650\u5236\u7684\u89e3\u51b3\u65b9\u6cd5\u3002\u4f46\u662f\u5728HTML5\u4e2d\uff0c\u8fd9\u79cd\u9650\u5236\u4f1a\u88ab\u6253\u7834\u3002HTML5\u89c4\u8303\u4e2d\u5305\u542b\u5f88\u591a\u529f\u80fd\u5f3a\u5927\u7684\u7279\u6027\uff0c\u80fd\u591f\u5c06\u6d4f\u89c8\u5668\u53d8\u6210\u529f\u80fd\u9f50\u5168\u7684RIA\u5ba2\u6237\u7aef\u5e73\u53f0\u3002Server-Sent Event\u548cWebSockets\u5c31\u662f\u5176\u4e2d\u7684\u4e24\u4e2a\u7279\u6027\uff0c\u8fd9\u4e24\u4e2a\u7279\u6027\u80fd\u591f\u5e2e\u52a9\u6211\u4eec\u5b9e\u73b0\u670d\u52a1\u5668\u5c06\u6570\u636e‘\u63a8\u9001’\u5230\u5ba2\u6237\u7aef\u7684\u529f\u80fd\u3002
\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6211\u4eec\u5148\u4ecb\u7ecd\u4e00\u4e0bServer-Sent Events\u7279\u6027
Server-Sent Events<\/strong>
Server-Sent Events\u5b9e\u9645\u4e0a\u5c06Comet\u6280\u672f\u8fdb\u884c\u4e86\u6807\u51c6\u5316\u3002Server-Sent Events\u89c4\u8303“\u5b9a\u4e49\u4e86API\u6765\u6253\u5f00\u4e00\u4e2aHTTP\u8fde\u63a5\uff0c\u901a\u8fc7\u8be5\u8fde\u63a5\u80fd\u591f\u83b7\u53d6\u4ece\u670d\u52a1\u5668\u63a8\u9001\u7684\u901a\u77e5”\u3002Server-Sent Events\u5305\u542b\u65b0\u7684HTML\u5143\u7d20EventSource\u548c\u65b0\u7684MIME\u7c7b\u578b text\/event-stream\uff0c\u8fd9\u4e2aMIME\u7c7b\u578b\u5b9a\u4e49\u4e86\u4e8b\u4ef6\u6846\u67b6\u683c\u5f0f\u3002<\/p>\n
\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6d4f\u89c8\u5668\u4f1a\u9650\u5236\u5230\u6bcf\u4e2a\u670d\u52a1\u5668\u7684\u8fde\u63a5\u7684\u6570\u91cf\u3002\u5728\u6709\u4e9b\u60c5\u51b5\u4e0b\uff0c\u88c5\u8f7d\u591a\u4e2a\u5305\u542b\u5230\u540c\u4e00\u4e2a\u57df\u7684EventSource\u5bf9\u8c61\u7684\u9875\u9762\u4f1a\u5bfc\u81f4\u5bf9\u6bcf\u4e2aEventSource\u521b\u5efa\u4e00\u4e2a\u4e13\u5c5e\u4e8e\u8be5EventSource\u7684\u8fde\u63a5\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5f88\u5feb\u5c31\u4f1a\u8d85\u51fa\u8fde\u63a5\u6570\u91cf\u9650\u5236\u3002\u4e3a\u4e86\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5171\u4eab\u7684WebWorker\uff0c\u8be5\u5bf9\u8c61\u5171\u4eab\u4e00\u4e2aEventSource\u7684\u5b9e\u4f8b\u3002\u53e6\u5916\uff0c\u901a\u8fc7\u5b9a\u4e49\u6d4f\u89c8\u5668\u7279\u5b9a\u7684EventSource\u5b9e\u73b0\uff0c\u6211\u4eec\u53ef\u4ee5\u505a\u5230\u5982\u679c\u4e24\u4e2aEventSource\u7684URL\u662f\u76f8\u540c\u7684\uff0c\u90a3\u4e48\u4ed6\u4eec\u5c31\u91cd\u7528\u76f8\u540c\u7684\u8fde\u63a5\u3002\u8fd9\u65f6\uff0c\u5171\u4eab\u7684\u8fde\u63a5\u5c31\u7531\u6d4f\u89c8\u5668\u7279\u5b9a\u7684EventSource\u5b9e\u73b0\u6765\u7ba1\u7406\u3002
\u5f53event stream\u6253\u5f00\u7684\u65f6\u5019\uff0c\u6d4f\u89c8\u5668\u4f1a\u53d1\u9001\u5982\u4e0b\u7684HTTP request\u3002
REQUEST:<\/p>\n
\u6839\u636etext\/event-stream\u7684\u683c\u5f0f\uff0c\u4e00\u4e2a\u4e8b\u4ef6\u6709\u4e00\u4e2a\u6216\u591a\u4e2a\u6ce8\u91ca\u884c\u548c\u5b57\u6bb5\u884c\u7ec4\u6210\u3002\u6ce8\u91ca\u884c\u662f\u7531\u5192\u53f7\uff1a\u5f00\u59cb\u7684\u884c\u3002\u5b57\u6bb5\u57df\u884c\u7531\u5b57\u6bb5\u540d\u548c\u5b57\u6bb5\u503c\u7ec4\u6210\uff0c\u5b57\u6bb5\u540d\u548c\u5b57\u6bb5\u503c\u4e5f\u662f\u7531\u5192\u53f7\uff1a\u5206\u9694\u3002\u591a\u4e2a\u4e8b\u4ef6\u4e4b\u95f4\u7528\u7a7a\u884c\u5206\u9694\u3002\u4e0b\u9762\u5c31\u662f\u4e00\u4e2aResponse\u7684\u4f8b\u5b50\uff1a
RESPONSE:<\/p>\n
\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u8be5response\u4e2d\u5305\u542b\u4e09\u4e2a\u4e8b\u4ef6\u3002\u7b2c\u4e00\u4e2a\u4e8b\u4ef6\u5305\u542b\u4e00\u4e2a\u6ce8\u91ca\u884c\u548c\u4e00\u4e2aretry\u5b57\u6bb5\uff1b\u7b2c\u4e8c\u4e2a\u4e8b\u4ef6\u548c\u7b2c\u4e09\u4e2a\u4e8b\u4ef6\u90fd\u662f\u5305\u542b\u4e00\u4e2aid\u5b57\u6bb5\u548c\u4e00\u4e2adata\u5b57\u6bb5\u3002data\u5b57\u6bb5\u4e2d\u5305\u542b\u7684\u662f\u4e8b\u4ef6\u7684\u6570\u636e\uff0c\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\u662f\u5f53\u524d\u7684\u65f6\u95f4\u3002id\u5b57\u6bb5\u662f\u7528\u6765\u5728event stream\u4e2d\u8ddf\u8e2a\u5904\u7406\u8fdb\u7a0b\u7684\u3002\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u670d\u52a1\u5668\u7aef\u7684\u5e94\u7528\u7a0b\u5e8f\u4f1a\u6bcf\u96945\u79d2\u5411event stream\u4e2d\u5199\u5165\u4e00\u4e2a\u4e8b\u4ef6\u3002\u5f53EventSource\u63a5\u6536\u5230\u8be5\u4e8b\u4ef6\u540e\uff0conmessage\u4e8b\u4ef6\u5904\u7406\u5668\u5c31\u4f1a\u88ab\u8c03\u7528\u3002
\u4e0d\u540c\u7684\u662f\uff0c\u7b2c\u4e00\u4e2a\u4e8b\u4ef6\u4e0d\u4f1a\u89e6\u53d1onmessage\u5904\u7406\u5668\u3002\u7b2c\u4e00\u4e2a\u4e2a\u4e8b\u4ef6\u6ca1\u6709data\u5b57\u6bb5\uff0c\u53ea\u5305\u542b\u4e00\u4e2a\u6ce8\u91ca\u884c\u548c\u4e00\u4e2aretry\u5b57\u6bb5\uff0cretry\u5b57\u6bb5\u662f\u7528\u4e8e\u91cd\u65b0\u8fde\u63a5\u7684\u76ee\u7684\u7684\u3002retry\u5b57\u6bb5\u5b9a\u4e49\u4e86\u91cd\u65b0\u8fde\u63a5\u7684\u65f6\u95f4\uff0c\u5355\u4f4d\u662f\u6beb\u79d2\u3002\u5982\u679c\u6536\u5230\u4e86\u8fd9\u6837\u7684\u5b57\u6bb5\uff0cEventSource\u4f1a\u66f4\u65b0\u5176\u76f8\u5173\u7684\u91cd\u65b0\u8fde\u63a5\u65f6\u95f4\u7684\u5c5e\u6027\u3002\u5728\u53d1\u751f\u7f51\u7edc\u9519\u8bef\u7684\u60c5\u51b5\u4e0b\uff0c\u91cd\u65b0\u8fde\u63a5\u65f6\u95f4\u5728\u63d0\u9ad8\u53ef\u9760\u6027\u65b9\u9762\u626e\u6f14\u4e86\u91cd\u8981\u7684\u89d2\u8272\u3002\u5f53EventSource\u5b9e\u4f8b\u53d1\u73b0\u8fde\u63a5\u65ad\u5f00\u4e86\uff0c\u5728\u6307\u5b9a\u7684\u91cd\u65b0\u8fde\u63a5\u65f6\u95f4\u4e4b\u540e\u4f1a\u81ea\u52a8\u7684\u91cd\u5efa\u8fde\u63a5\u3002
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u5728HTTP request\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6307\u5b9aLast-Event-Id\u3002EventSource\u5728\u91cd\u5efa\u8fde\u63a5\u7684\u65f6\u5019\u4f1a\u6307\u5b9a\u8be5\u503c\u3002\u6bcf\u6b21EventSource\u6536\u5230\u5305\u542bid\u5b57\u6bb5\u7684\u4e8b\u4ef6\u65f6\uff0cEventSource\u7684last event id\u5c5e\u6027\u4f1a\u88ab\u66f4\u6539\uff0c\u5728\u91cd\u5efa\u8fde\u63a5\u7684\u65f6\u5019\uff0cEventSource\u7684last event id\u5c5e\u6027\u4f1a\u88ab\u5199\u5165HTTP request\u7684Last-Event-Id\u4e2d\u3002\u8fd9\u6837\u5982\u679c\u670d\u52a1\u5668\u7aef\u5b9e\u73b0\u4e86lastEventId\u7684\u5904\u7406\uff0c\u5c31\u53ef\u4ee5\u4fdd\u8bc1\u5728\u91cd\u5efa\u7684\u8fde\u63a5\u4e2d\u4e0d\u4f1a\u53d1\u9001\u5df2\u7ecf\u6536\u5230\u7684\u4e8b\u4ef6\u4e86\u3002
\u4e0b\u9762\u7684\u4ee3\u7801\u662f\u4e00\u4e2a\u57fa\u4e8eJava HTTP \u5e93xLightweb\uff08\u5305\u542bHTML5\u9884\u89c8\u6269\u5c55\uff09\u7684HttpServer\u7684\u4f8b\u5b50\u3002<\/p>\n
Server-Sent Event\u662f\u57fa\u4e8eHTTP streaming\u7684\u3002\u5982\u4e0a\u6240\u8ff0\uff0cresponse\u4f1a\u4e00\u76f4\u6253\u5f00\uff0c\u5f53\u670d\u52a1\u5668\u7aef\u6709\u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u5019\uff0c\u4e8b\u4ef6\u4f1a\u88ab\u5199\u5165response\u4e2d\u3002\u7406\u8bba\u4e0a\u6765\u8bf4\uff0c\u5982\u679c\u7f51\u7edc\u7684\u4e2d\u4ecb\u5982HTTP\u4ee3\u7406\u4e0d\u7acb\u5373\u8f6c\u53d1\u90e8\u5206\u7684response\uff0cHTTP streaming\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u95ee\u9898\u3002\u73b0\u5728\u7684HTTP RFC \uff08RFC2616 Hypertext Transfer Protocal – HTTP\/1.1\uff09\u6ca1\u6709\u8981\u6c42\u90e8\u5206\u7684response\u5fc5\u987b\u88ab\u7acb\u523b\u8f6c\u53d1\u3002\u4f46\u662f\uff0c\u5f88\u591a\u5df2\u7ecf\u5b58\u5728\u7684\u6d41\u884c\u7684\u3001\u5de5\u4f5c\u826f\u597d\u7684web\u5e94\u7528\u7a0b\u5e8f\u662f\u57fa\u4e8eHTTP streaming\u7684\u3002\u800c\u4e14\uff0c\u4ea7\u54c1\u7ea7\u522b\u7684\u4e2d\u4ecb\u901a\u5e38\u4f1a\u907f\u514d\u7f13\u51b2\u5927\u91cf\u7684\u6570\u636e\u6765\u964d\u4f4e\u5185\u5b58\u7684\u5360\u7528\u7387\u3002
\u548c\u5176\u4ed6\u7684\u6d41\u884c\u7684Coment\u534f\u8bae\u5982Bayeux\u548cBOSH\u4e0d\u540c\uff0cServer-Sent Event\u53ea\u652f\u6301\u5355\u5411\u7684\u4ece\u670d\u52a1\u5668\u5230\u5ba2\u6237\u7aef\u7684\u901a\u9053\u3002Bayeux\u534f\u8bae\u652f\u6301\u53cc\u5411\u7684\u901a\u4fe1\u901a\u9053\u3002\u53e6\u5916\uff0cBayeux\u80fd\u591f\u4f7f\u7528HTTP Streaming\u548c\u8f6e\u8be2\u3002BOSH\u534f\u8bae\u4e5f\u652f\u6301\u53cc\u5411\u901a\u4fe1\u901a\u9053\uff0c\u4f46\u662fBOSH\u662f\u57fa\u4e8e\u8f6e\u8be2\u673a\u5236\u7684\u3002\uff08\u6240\u8c13\u7684\u8f6e\u8be2\u5c31\u662f\u5ba2\u6237\u7aef\u5b9a\u671f\u53d1\u9001request\u5230\u670d\u52a1\u5668\u7aef\u6765\u83b7\u53d6\u6570\u636e\uff09\u3002
\u5c3d\u7ba1Server-Sent Events\u6bd4Bayeux\u548cBOSH\u7684\u529f\u80fd\u8981\u5c11\uff0c\u4f46\u662f\u5728\u53ea\u9700\u8981\u5355\u5411\u7684\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u63a8\u9001\u6570\u636e\u7684\u60c5\u51b5\u4e0b\uff08\u5728\u5f88\u591a\u60c5\u51b5\u4e0b\u90fd\u662f\u8fd9\u6837\uff09\uff0cServer-Sent Events\u6709\u6f5c\u529b\u6210\u4e3a\u5360\u4e3b\u5bfc\u5730\u4f4d\u7684\u534f\u8bae\u3002Server-Sent Events\u534f\u8bae\u88abBayeus\u548cBOSH\u8981\u7b80\u5355\u7684\u591a\u3002\u53e6\u5916\uff0cServer-Sent Events\u88ab\u6240\u6709\u517c\u5bb9HTML5\u7684\u6d4f\u89c8\u5668\u652f\u6301\uff08\u8fd9\u5c31\u662f\u89c4\u8303\u7684\u5a01\u529b\u554a\uff09\u3002<\/p>\n<\/p>\n