[英]Socket.IO TypeError: Cannot read property 'emit' of undefined
I wrote the following code for chat client to client(client1 to server server to client2) but I am getting an error: 我为聊天客户端到客户端(客户端1到服务器服务器到client2)编写了以下代码,但出现错误:
Missing error handler on socket
. socket
上缺少错误处理程序。 TypeError: Cannot read property 'emit' of undefined TypeError:无法读取未定义的属性“ emit”
Here is my serverside code. 这是我的服务器端代码。
var app = require('http').createServer(handler)
, io = require('socket.io').listen(app)
, fs = require('fs')
app.listen(3000);
var users = {};
var reciverusers = {};
function handler (req, res) {
fs.readFile(__dirname + '/index.html',
function (err, data) {
if (err) {
res.writeHead(500);
return res.end('Error loading index.html');
}
res.writeHead(200);
res.end(data);
});
}
io.sockets.on('connection', function (socket) {
socket.on("users",function(data){
users[data.uid]=data.uid;
users[data.uname] =data.uname;
//console.log(data);
console.log("User Id is "+users[data.uid]);
console.log("Username is "+users[data.uname]);
console.log(users[data.uname] + " Joined with this Id: " +users[data.uid]);
//console.log("cnsle users : "+users[0]);
});
socket.on("sendmsg", function(msgdata){
console.log(msgdata);
reciverusers[msgdata.recipent]=msgdata.recipent;
reciverusers[msgdata.message]=msgdata.message;
console.log("reciver id "+reciverusers[msgdata.recipent]);
for(var name in users) {
if(users[name] === reciverusers[msgdata.recipent]) {
console.log("yes user exits");
console.log("Sending : "+ reciverusers[msgdata.message]);
io.sockets.emit("rmsg",reciverusers[msgdata.message]);
io.sockets.connected[reciverusers[msgdata.recipent]].emit("rmsg", {'msg':reciverusers[msgdata.message]});
break;
}else{
console.log("No user not exists");
}
}
});
And client side code 和客户端代码
var username,uid;
var socket = io.connect('http://localhost');
$(".client_name").on("submit", function(){
// Tell the server about it
var username = $("#cleintname").val();
var userid = $("#cliendID").val();
socket.emit("users", {"uname": username,"uid":userid});
$(".client_name").remove();
$("#Clientnm").text(username);
return false;
});
var chat_form = $(".chatform");
chat_form.on("submit", function(){
// Send the message to the server
var reciver_id = $("#reciver_id").val();
var msg = $("#message").val();
socket.emit("sendmsg", {"recipent":reciver_id, "message":msg});
// Empty the form
$("#message").val('');
return false;
});
// Whenever we receieve a message, append it to the <ul>
socket.on("rmsg", function(data){
$("#messages").append(data);
});
it complile with this command: node app.js : compiled [OK] 它符合以下命令:node app.js:已编译[确定]
When I enter or login: Its work fine [OK] 当我输入或登录时:工作正常[确定]
When I send message to another client: failed [Not ok] It gave me following error: 当我向另一个客户端发送消息时:失败[不正常]它给了我以下错误:
User Id is 1 用户ID为1
Username is test 用户名是test
test Joined with this Id: 1 测试与此ID连接:1
User Id is 2 用户ID为2
Username is test2 用户名是test2
test2 Joined with this Id: 2 test2加入了这个ID:2
here works fine and from here i tried to send message to user2/client2 that give me error 在这里工作正常,从这里我尝试将消息发送到user2 / client2,这给了我错误
{ recipent: '1', message: 'ssfsfs' } {配方:“ 1”,消息:“ ssfsfs”}
reciver id 1 收款人编号1
yes user exits 是的,用户退出
Sending : ssfsfs 正在发送:ssfsfs
Missing error handler on socket
. socket
上缺少错误处理程序。
TypeError: Cannot read property 'emit' of undefined TypeError:无法读取未定义的属性“ emit”
I do my best to explain my code am using socket.io lib new version 我尽力解释我的代码正在使用socket.io lib新版本
You've binded Your app to 3000-th port, and set socket.io to work with http module that listens on 3000. 您已将您的应用程序绑定到第3000个端口,并将socket.io设置为与监听3000的http模块一起使用。
So You've to change on clientside this: 因此,您必须在客户端进行以下更改:
var socket = io.connect('http://localhost');
to this: 对此:
var socket = io.connect('http://localhost:3000');
or just: 要不就:
var socket = io.connect();
also from Your code: 同样从您的代码:
users[data.uid]=data.uid;
users[data.uname] =data.uname;
I don't see any logic here :) Why not to keep it like: 我在这里看不到任何逻辑:)为什么不这样保留:
users[data.uid] = {uid: data.uid, uname: data.uname}
sockets[socket.id] = socket;
if(!users[data.uid].sockets) {
users[data.uid].sockets = [];
}
users[data.uid].sockets.push(socket);
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