Created
May 13, 2012 18:05
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NodeJS HTTP Chat Application
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| var express = require("express"); | |
| var sys = require("sys"); | |
| var io = require("socket.io"); | |
| var ChatServer = {}; | |
| ChatServer.members = {}; | |
| ChatServer.publish = function(client, data) { | |
| if (client in ChatServer.members) | |
| for (var sessionId in ChatServer.members) | |
| ChatServer.members[sessionId].send(client.sessionId + ": " + data); | |
| else sys.puts("[ERROR] Unsubscribed client message: " + client); | |
| }; | |
| ChatServer.subscribe = function(client) { | |
| if (client.sessionId in ChatServer.members) | |
| sys.puts("[ERROR] Client has already subscribed: " + client); | |
| else ChatServer.members[client.sessionId] = client; | |
| }; | |
| ChatServer.handle = function(client, message) { | |
| switch (message.action) { | |
| case "subscribe": | |
| ChatServer.subscribe(client); | |
| break; | |
| case "send": | |
| ChatServer.send(client, message.data); | |
| break; | |
| default: | |
| sys.puts("[ERROR] Invalid message: " + message); | |
| } | |
| }; | |
| ChatServer.render = function(req, res) { | |
| res.render("index.ejs", {layout: false}); | |
| }; | |
| var app = express.createServer(); | |
| app.use("/static", express.static(__dirname + "/static")); | |
| app.get("/", ChatServer.render); | |
| var socket = io.listen(app); | |
| socket.on("connection", function(client) { | |
| client.on("message", function(message) { | |
| ChatServer.handle(client, message); | |
| }); | |
| }); | |
| app.listen(3000); |
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| $(document).ready(function() { | |
| var socket = io.connect("http://localhost"); | |
| // Set socket listeners. | |
| socket.on("connect", function() { | |
| $("#board").append("<p>Connected!</p>"); | |
| }); | |
| socket.on("message", function(data) { | |
| $("#board").append("<p>" + data + "</p>"); | |
| }); | |
| socket.on("disconnect", function() { | |
| $("#board").append("<p>Disconnected!</p>"); | |
| }); | |
| // Subscribe to the channel. | |
| socket.send({action: "subscribe"}); | |
| // Set send event. | |
| $("#data").keypress(function(ev) { | |
| if (ev.which == 13) | |
| socket.send({action: "publish", data: $("#data").val()}, | |
| function() { $("#data").val(""); }); | |
| }); | |
| }); |
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| <html> | |
| <head> | |
| <title>ChatServer</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
| <script type="text/javascript" src="/socket.io/socket.io.js"></script> | |
| <script type="text/javascript" src="/static/jquery.js"></script> | |
| <script type="text/javascript" src="/static/client.js"></script> | |
| </head> | |
| <body> | |
| <div id="board"></div> | |
| <input id="data" type="text" /> | |
| </body> | |
| </html> |
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