Tracking down a memory leak in Node.js and Socket.IO
If you are running Node.js 0.8 and Socket.IO over HTTPS then you will be affected by this memory leak. See the bottom of the post for details of a fix. Node.js is a great bit of kit, but it’s still a relatively young technology. I was bitten by this recently when I had to investigate a large memory leak in one of the Node.js apps I maintain. There are tools that can help to track down these sorts
pxsta's blog » socket.io-clientを用ã„ã¦Express+Socket.IOã§ä½œã£ãŸã‚µãƒ¼ãƒ“スã¸åŒæ™‚接続テストを行ã†
Express3.x(connect2.3+)ã¨Socket.IOã§ã®ã‚»ãƒƒã‚·ãƒ§ãƒ³ç®¡ç†ã¨mochaã¨superagentã§expressを使ã£ãŸã‚µãƒ¼ãƒ“スã®ãƒã‚°ã‚¤ãƒ³å‘¨ã‚Šã®ãƒ†ã‚¹ãƒˆã®ç¶šã。 今回ã¯socket.ioã®åŒæ™‚接続ã®ãƒ†ã‚¹ãƒˆã«ã¤ã„ã¦ã€‚今回㯠1000人åŒæ™‚接続ãŒå‡ºæ¥ã‚‹ã‹ æ£ã—ãメッセージã®ã‚„ã‚Šã¨ã‚ŠãŒå‡ºæ¥ã‚‹ã‹(ãƒãƒ£ãƒƒãƒˆãªã®ã§) ãƒã‚°ã‚¤ãƒ³æ¸ˆã¿ãƒ¦ãƒ¼ã‚¶ãƒ¼ã®ã¿ãŒæŽ¥ç¶šã§ãã‚‹ã‹ ã®ãƒ†ã‚¹ãƒˆã‚’è¡Œãªã£ã¦ã¿ã¾ã—ãŸã€‚ socket.io-clientを用ã„ã‚Œã°ã€ã‚³ãƒ³ã‚½ãƒ¼ãƒ«ã‹ã‚‰åŒæ™‚接続ã®ãƒ†ã‚¹ãƒˆãŒç°¡å˜ã«å‡ºæ¥ã¾ã™ã€‚ ãŸã ã—ã€ç’°å¢ƒã«ã‚ˆã£ã¦ã¯OS自体ã®ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ã®æœ€å¤§æ•°ã‚’引ã上ã’ãªã„ã¨1000人åŒæ™‚接続ã¯é›£ã—ã„ã§ã™ã€‚ ソースコード 今回ã¯ä»Šã¾ã§ã®ã‚’å…¨ã¦å«ã‚ãŸã‚‚ã®ã‚’githubã«ä¸Šã’ã¦ã„ã¾ã™ã€‚ pxsta / express-socket.io-chat-test 今回ã®ç’°å¢ƒ Mac OSX 10.7.4 Lio
Socket.IO or WebSocket ã‚’ AmazonELB ã§ãƒãƒ©ãƒ³ã‚¹ã™ã‚‹æ¤œè¨¼ - Block Rockin’ Codes
追記 12/2/29 検証コードã¨ç’°å¢ƒã¯å¾Œã«ã—ã¦ã¨ã‚Šã‚ãˆãšçµæžœã ã‘書ã 12/3/5 Socket.IO ã® RedisStore を使ãˆã°ã‚¹ã‚±ãƒ¼ãƒ«å¯èƒ½ãªã“ã¨ãŒã‚ã‹ã£ãŸã®ã§è¿½åŠ 12/3/11 æ¤œè¨¼ã‚³ãƒ¼ãƒ‰è¿½åŠ caution ã“ã®æ¤œè¨¼ã¯ æ±äº¬Nodeå¦åœ’ 4時é™ç›® - connpass ã§ã‚„ã£ãŸçµæžœã§ã™ã€‚ã—ã‹ã—ãã®æ™‚ã®ç’°å¢ƒã‚„ソースãŒæ‰‹å…ƒã«ç„¡ã„ã®ã§ä»Šå†ç¾ã‚½ãƒ¼ã‚¹ã¨ç’°å¢ƒã‚’作ã£ã¦ã„ã¾ã™ã€‚ 2/28 ç¾åœ¨åˆ†ã‹ã£ã¦ã‚‹çµè«–ã ã‘å…ˆã«å‡ºã—ã¦ãŠãã¾ã™ã€‚ソースã¯å¾Œã§è¿½ã£ã¦æŽ²è¼‰ã—ã¾ã™ã€‚ãã®æ™‚点ã§ã‚‚ã—çµè«–ãŒå¤‰ã‚ã£ãŸã‚Šã—ãŸå ´åˆã¯è¿½è¨˜ã—ã¾ã™ã€‚ ã¾ãŸã€ã“ã®æ¤œè¨¼å†…容ã«ã¤ã„ã¦ã¯ä¸€åˆ‡è²¬ä»»ã¯å–ã‚Šã¾ã›ã‚“ã®ã§ã€ãƒ—ãƒãƒ€ã‚¯ã‚·ãƒ§ãƒ³ç‰ã§ä½¿ã†å ´åˆã¯ãã¡ã‚“ã¨æ¤œè¨¼ã—ã¦ä¸‹ã•ã„。 特㫠ELB ã®ä»•æ§˜ãŒå¤‰ã‚ã£ãŸã‚‰çµæžœãŒå¤‰ã‚ã‚‹ã¨æ€ã„ã¾ã™ã€‚çµæžœãŒå¤‰ã‚ã£ãŸã“ã¨ã«æ°—ãŒã¤ã„ãŸæ–¹ã¯æ•™ãˆã¦é ‚ã‘ã‚‹ã¨åŠ©ã‹ã‚Šã¾ã™ã€‚ code 検証コードを公開ã—ã¾ã—ãŸã€‚ https://
Node.jsã«ã¦socket.ioã®joinã§ãƒãƒ£ãƒƒãƒˆãƒ«ãƒ¼ãƒ å®Ÿè£…ï¼ - ã¸ãょã®ãƒ¼ã¨
JavaScript Advent Calendar 2011(Node.js/WebSocketsコース) 22日目ã§ã™ï¼ 急é½å‚戦ï¼ãã—ã¦åˆAdvent Calendar... Node.jsã§ã®ãƒãƒ£ãƒƒãƒˆãƒ«ãƒ¼ãƒ ã®å®Ÿè£…ã«socket.ioã®join()を使ã£ã¦ã¿ã¾ã™ã€‚ ã¯ã˜ã‚ã« socket.ioを利用ã—ãŸãƒãƒ£ãƒƒãƒˆæ©Ÿèƒ½ã®å®Ÿè£…ã«ã¤ã„ã¦ã¯ サンプルも多ãçµæ§‹ç°¡å˜ã«å®Ÿè£…ãŒå¯èƒ½ã§ã™ã€‚ ã§ã™ãŒã€ãƒãƒ£ãƒƒãƒˆãƒ«ãƒ¼ãƒ ã®å®Ÿè£…方法ã«ã¤ã„ã¦ã¯æƒ…å ±ãŒå°‘ãªã ã‚„ã‚Šæ–¹ãŒã‚ã‹ã‚‰ãªã‹ã£ãŸã®ã§è‰²ã€…調ã¹ã¤ã¤ RoomList, Room, User クラスを自作ã™ã‚‹ã“ã¨ã§å¯¾å¿œã‚’è¡Œã„ã¾ã—ãŸã€‚ ※sample https://github.com/hekyou/socket_io-not-join-sample ã§ã™ãŒã€ã€ 最近socket.ioã«joinメソッドãŒã‚ã‚‹ã“ã¨ã‚’知りã¾ã—ã¦ã€‚ ã“ã‚Œãªã‚‰ç°¡æ½”ã«æ›¸ã‘ã‚‹ã˜ã‚ƒã‚“... ã¨ã€æ€
socket.io and Express. Tying it all together. | blinzeln
NOTE: This article was written for Express 2.x.x. It might not work for Express 3 without modification. Express is a great web development framework for node.js. It provides easy access to stuff like routing, requests and sessions. socket.io is an abstraction layer for Websockets, with Flash and XHR fallbacks, that runs in both node.js and the client. The Basics You can have socket.io run with Exp
IE10ã§å‹•ãHTML5アプリ実装例　「Node.jsã¨Socket.IOを使用ã—ãŸãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ アプリã€
ã¯ã˜ã‚ã« Internet Explorer 10（以下ã€IE10）ã§ã¯ã€HTML5や関連APIã®å®Ÿè£…ãŒå¤§ãã進ã¿ã¾ã™ãŒã€ä¸ã§ã‚‚WebSocketã«å¯¾å¿œã™ã‚‹ã“ã¨ã¯ã‚¢ãƒ—リケーション開発者ã«ã¨ã£ã¦éžå¸¸ã«é‡è¦ã§ã™ã€‚ WebSocketã¯ã€HTTPリクエストã§ç¢ºç«‹ã—ãŸæŽ¥ç¶šã‚’「繋ãŽã£ã±ãªã—ã€ã«ã™ã‚‹ã“ã¨ã§ã€ã‚µãƒ¼ãƒã¨ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã®åŒæ–¹å‘ã§åŠ¹çŽ‡çš„ãªé€šä¿¡ã‚’実ç¾ã™ã‚‹æŠ€è¡“ã§ã™ã€‚WebSocketã¯æ–°ã—ã„通信プãƒãƒˆã‚³ãƒ«ã§ã™ï¼ˆRFC）ãŒã€HTTPã¨åŒã˜ãƒãƒ¼ãƒˆç•ªå·ã‚’使用ã™ã‚‹ãŸã‚ファイアウォールを越ãˆã‚„ã™ã„ã®ã¨ã€JavaScript APIã«é–¢ã™ã‚‹ä»•æ§˜ã‚‚ã‚らã‹ã˜ã‚用æ„ã•ã‚Œã¦ãŠã‚Šã€Webアプリケーションã¨ã®è¦ªå’Œæ€§ãŒéžå¸¸ã«é«˜ã„ã®ã‚‚特徴ã§ã™ã€‚ WebSocketã¯ã€IE10ã ã‘ã§ã¯ãªãGoogle Chromeã€Firefoxã€Safariã¨è¨€ã£ãŸãƒ–ラウザã§ã‚‚サãƒãƒ¼ãƒˆã•ã‚Œã¦ã„ã¾ã™(Operaã§ã¯ã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ç„¡åŠ¹ã«ã•ã‚Œã¦ã„ã¾
Socket.IOãŒã©ã‚Œãらã„リアルタイムãªã®ã‹ã¡ã‚‡ã£ã¨è¨ˆã£ã¦ã¿ãŸ - ã™ãŽã‚ƒãƒ¼ã‚“メモ
node.js+Socket.IOã§ãƒªã‚¢ãƒ«ã‚¿ã‚¤ãƒ アプリケーションãŒä½œã‚Œã‚‹ã‚ã‘ã ã‘ã©ã€WebSocket使ã†ã«ã—ã¦ã‚‚XHR-Polling使ã†ã«ã—ã¦ã‚‚サーãƒçµŒç”±ã—ã¦é€šä¿¡ã—ã¦ã„ã‚Œã°å½“然タイムラグã¯ã‚ã‚‹ã‚ã‘ã§ã€ãã‚Œã£ã¦ã©ã‚Œãらã„é…延ã™ã‚‹ã‚‚ã®ãªã‚“ã ã‚ã†ï¼Ÿ ã¨æ€ã£ã¦ã„ã‚ã‚“ãªã‚µãƒ¼ãƒã§è©¦ã—ã¦ã¿ãŸ(追記ã—ã¾ã—ãŸ)。 測定方法 var server = require('http').createServer(function (req, res) { require('data-section').get('html', function (err, data) { res.writeHead(200, { 'Content-Type': 'text/html' }); res.end(data); }); }); var io = require('socket.io').listen(server);
WebSocket Serverã¾ã¨ã‚ | @blog.justoneplanet.info
Chrome 14ã‹ã‚‰WebSocketプãƒãƒˆã‚³ãƒ«ã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ãŒdraft 10ã«ãªã‚‹ã€‚ç¾åœ¨ã€Chrome 13ã¯draft 76ã§å®Ÿè£…ã•ã‚Œã¦ãŠã‚Šdraft 76ã¨draft 10ã¯äº’æ›æ€§ãŒãªã„。WebSocketを使ã£ãŸæ—¢å˜ã®ã‚µãƒ¼ãƒ“スã¯å£Šã‚Œã‚‹ã®ã§draft 10ã§å®Ÿè£…ã•ã‚ŒãŸWebSocketServerを探ã—ã¨ãã®æƒ…å ±ã‚’ã¾ã¨ã‚ãŸã€‚ â– New WebSocket Protocol: Secure and Extensible Please note that the new protocol is incompatible with one which Chromium previously supported (draft-ietf-hybi-thewebsocketprotocol-00), so existing WebSocket-based services may break.
Socket.ioã®broadcastã¯ã€Œç¾åœ¨ã®ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆä»¥å¤–ï¼ã€ã¸ã®broadcastãªã®ã§æ³¨æ„
socket.ioã§ã‚るブラウザを開ãã€ä¾‹ãˆã°socket.broadcast.emit('announcement', 'hello');ã¨é€ä¿¡ã—ãŸå ´åˆã€ã“ã®helloã¨ã„ã†ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸ã¯ã€ç¾åœ¨é–‹ã„ã¦ã„る当該ã®ãƒ–ラウザã«ã¯é€ä¿¡ã•ã‚Œãªã„ã®ã§æ³¨æ„。 localhost:3000ã§socket.ioã®ã‚µãƒ¼ãƒãƒ¼ã‚’èµ·å‹•ã—ã¦ã„る状æ³ã§ã€ãƒ–ラウザーã§http://localhost:3000ã‚’é–‹ãã¨ã€console.logã®å‡ºåŠ›çµæžœã¨ã—ã¦ã€Œthis message is for EVERYONE.ã€ã¨ã„ã†ãƒ‡ãƒãƒƒã‚°å‡ºåŠ›ã‚’期待ã—ãŸã¨ã—ã¾ã™ã€‚ã“ã®æ™‚ã€ã‚µãƒ¼ãƒãƒ¼å´ã®ã‚³ãƒ¼ãƒ‰ã§socket.broadcast.emit('announcement', 'this message is for EVERYONE.');ã¨æ›¸ã„ã¦å®Ÿè¡Œã—ã¦ã‚‚ã€ãれを見ã¦ã„るブラウザーã®ãƒ‡ãƒãƒƒã‚°ã«ã¯ã€Œthis message is for E
Medium
You can find (just about) anything on Medium — apparently even a page that doesn’t exist. Maybe these stories will take you somewhere new?
Socket.IO: the cross-browser WebSocket for realtime apps.
Socket.IOBidirectional and low-latency communication for every platform PerformantIn most cases, the connection will be established with WebSocket, providing a low-overhead communication channel between the server and the client. ReliableRest assured! In case the WebSocket connection is not possible, it will fall back to HTTP long-polling. And if the connection is lost, the client will automatical
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