#!/usr/bin/env node
var WebSocketServer = require('websocket').server;
var http = require('http');
var server = http.createServer(function(request, response) {
console.log((new Date()) + ' Received request for ' + request.url);
response.writeHead(404);
response.end();
});
server.listen(8080, function() {
console.log((new Date()) + ' Server is listening on port 8080');
});
wsServer = new WebSocketServer({
httpServer: server,
// You should not use autoAcceptConnections for production
// applications, as it defeats all standard cross-origin protection
// facilities built into the protocol and the browser. You should
// *always* verify the connection's origin and decide whether or not
// to accept it.
autoAcceptConnections: false
});
function originIsAllowed(origin) {
// put logic here to detect whether the specified origin is allowed.
return true;
}
var jConnections = new Array();
wsServer.on('request', function(request) {
if (!originIsAllowed(request.origin)) {
// Make sure we only accept requests from an allowed origin
request.reject();
console.log((new Date()) + ' Connection from origin ' + request.origin + ' rejected.');
return;
}
var connection = request.accept('echo-protocol', request.origin);
var jConnectionIdentity = new Date();
jConnections.push(new Array(connection,jConnectionIdentity) );
//console.log("datestamp"+jConnections[0][1]);
console.log((new Date()) + ' Connection accepted.');
connection.on('message', function(message) {
if (message.type === 'utf8') {
console.log('Received Message: ' + message.utf8Data);
//connection.sendUTF(message.utf8Data);
for(var i=0;i<jConnections.length;i++)
{
var jConnection = jConnections[i][0];
jConnection.sendUTF(message.utf8Data);
}
}
else if (message.type === 'binary') {
console.log('Received Binary Message of ' + message.binaryData.length + ' bytes');
//connection.sendBytes(message.binaryData);
for(var i=0;i<jConnections.length;i++)
{
var jConnection = jConnections[i][0];
jConnection.sendBytes(message.binaryData);
}
}
});
connection.on('close', function(reasonCode, description) {
for(var i=0;i<jConnections.length;i++)
{
if(jConnections[i][1] == jConnectionIdentity)
{
delete jConnections[i];
console.log((new Date()) + ' Peer ' + connection.remoteAddress + ' disconnected.');
console.log(jConnections.length);
}
}
});
});
如果我打开3个客户端连接并从每个客户端发送消息然后关闭第三个客户端，我看到“console.log（jConnections.length）;”的输出还是三个。在关闭第三个客户端并从客户端2发送消息时，会发生NodeJS崩溃。我的控制台输出如下所示：
C:\Program Files\nodejs>node.exe workingexample3.js
Mon May 20 2013 16:30:14 GMT-0700 (Pacific Daylight Time) Server is listening on port 8080
Mon May 20 2013 16:30:18 GMT-0700 (Pacific Daylight Time) Connection accepted.
Mon May 20 2013 16:30:20 GMT-0700 (Pacific Daylight Time) Connection accepted.
Mon May 20 2013 16:30:22 GMT-0700 (Pacific Daylight Time) Connection accepted.
Received Message: client1
Received Message: client2
Received Message: client3
Mon May 20 2013 16:30:43 GMT-0700 (Pacific Daylight Time) Peer 127.0.0.1 disconnected.
3
Received Message: client2
C:\Program Files\nodejs\workingexample3.js:48
var jConnection = jConnections[i][0];
^
TypeError: Cannot read property '0' of undefined
at WebSocketConnection.<anonymous> (C:\Program Files\nodejs\workingexample3.js:48:38)
at WebSocketConnection.EventEmitter.emit (events.js:95:17)
at WebSocketConnection.processFrame (C:\Program Files\nodejs\node_modules\websocket\lib\WebSocketConnection.js:403:26)
at WebSocketConnection.handleSocketData (C:\Program Files\nodejs\node_modules\websocket\lib\WebSocketConnection.js:247:14)
at Socket.EventEmitter.emit (events.js:95:17)
at Socket.<anonymous> (_stream_readable.js:736:14)
at Socket.EventEmitter.emit (events.js:92:17)
at emitReadable_ (_stream_readable.js:408:10)
at emitReadable (_stream_readable.js:404:5)
at readableAddChunk (_stream_readable.js:165:9)
C:\Program Files\nodejs>
我希望在删除语句中jConnections.length的值会减少1，但似乎没有发生。由于我的所有三个客户端都是从localhost 127.0.0.1连接的，因此我不得不想出一个计划，通过remoteAdress属性之外的其他东西来识别每个连接。这就是为什么我除了连接对象之外还要推送Date。我希望通过创建它的日期来识别每个连接。
答案 0 :(得分：2)
1）调用delete后，您的数组看起来像这样 -
[[1, 1], [2, 2], undefined]
长度仍为3：）