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POsocket.io client persistent retries to unreachable host
 

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    <p>I'm trying to get a persistent connection from my socket.io-client (running on Node.js) to a remote websocket. I do not have control over the remote socket, and sometimes it can go down entirely. I would like to attempt to reconnect() whenever an error or disconnect occurs. In the following example, I'm trying to test the case where the remote host is refusing a connection. In this case, I would like to attempt to reconnect after 1 second. It calls a second time, and exits.</p> <p>Here's the code:</p> <pre><code>var events = require('events'), util = require('util'), io = require('socket.io-client'), url = "ws://localhost:12345", // intentionally an unreachable URL socketOptions = { "transports" : [ "websocket" ], "try multiple transports" : false, "reconnect" : false, "connect timeout" : 5000 }; // The goal is to have this socket attempt to connect forever // I would like to do it without the built in reconnects, as these // are somewhat unreliable (reconnect* events not always firing) function Test(){ var self = this; events.EventEmitter.call(self); var socket; function reconnect(){ setTimeout(go, 1000); } function go(){ console.log("connecting to", url, socketOptions); socket = io.connect(url, socketOptions); socket.on('connect', function(){ console.log("connected! wat."); }); socket.on('error', function(err){ console.log("socket.io-client 'error'", err); reconnect(); }); socket.on('connect_failed', function(){ console.log("socket.io-client 'connect_failed'"); reconnect(); }); socket.on('disconnect', function(){ console.log("socket.io-client 'disconnect'"); reconnect(); }); } go(); } util.inherits(Test, events.EventEmitter); var test = new Test(); process.on('exit', function(){ console.log("this should never end"); }); </code></pre> <p>When running it under node 0.11.0 I get the following:</p> <pre><code>$ node socketio_websocket.js connecting to ws://localhost:12345 { transports: [ 'websocket' ], 'try multiple transports': false, reconnect: false, 'connect timeout': 5000 } socket.io-client 'error' Error: connect ECONNREFUSED at errnoException (net.js:878:11) at Object.afterConnect [as oncomplete] (net.js:869:19) connecting to ws://localhost:12345 { transports: [ 'websocket' ], 'try multiple transports': false, reconnect: false, 'connect timeout': 5000 } this should never end </code></pre>
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