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一直在尝试使用node.js和socket.io创建一个聊天应用程序，但已经停留了一段时间，继承人为什么我成功实现了发送私人消息通过点击你想要私密聊天的人的用户名之间的连接用户之间，但我现在面临的问题是，例如，假设有3个连接的用户在聊天应用程序（说喜悦，恩典，shanel）时欢乐决定与恩典聊天，聊天应用程序处理得很好，但如果喜欢在首次与恩典聊天后决定与夏纳尔聊天，那么喜欢用于夏娜尔的私人消息最终会被送到恩典（即恩典和夏纳尔接收者这个私人信息的恩典），这是一直面临的问题。我的代码如下所示，比较遗憾的是作文，我想任何人都试图帮助理解我的处境:)使用socket.io发送消息给非预期用户
server.js代码
var express = require('express');
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var usernames={};
var sockets = {};
var names= {};
app.use(express.static(__dirname + '/public'));
app.get('/', function(req, res){
res.sendfile('index.html');
});
io.on('connection', function(socket){
socket.on('send_msg', function(msg){
console.log('a user connected');
io.emit('chat message', msg);
//console.log(msg);
});
socket.on('new_user',function(user){
console.log('new user:'+user);
names[socket.id] = user;
socket.nickname= user;
usernames[socket.nickname] = socket;
sockets[user]=socket.id;
socket.emit('update_personal', "you are now online");
io.emit('update_users',names);
});
socket.on('disconnect', function(){
io.emit('update_personal', usernames[socket.id]+' is now offline');
//delete usernames[socket.id];
delete names[socket.id];
delete usernames[socket.nickname];
// io.emit('update_users',usernames,usernames[socket.id]);
io.emit('update_users',names);
//console.log(usernames+'specific user id'+usernames[user]);
});
socket.on('private_msg', function(msg,recipient,sender){
console.log('you are trying to send '+msg+' to '+recipient+ ' from '+sender);
var id = sockets[recipient];
console.log(sockets[recipient]);
io.to(id).emit('received_p_msg', msg,sender,recipient);
recipient = '';
console.log('value in recipient:'+recipient);
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
client.html
<!doctype html>
<html>
<head>
<title>my chat app</title>
<!------------------
<style>
<!-----------
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
#chat_msg{
}
</style><!-------!>
</head>
<body>
<!---username login here----->
<div id="login">
<form id="chat_msg">
<label>Enter Username:</label>
<input type="text" id="username"/>
<input type="button" id="join" value="Create Username"/>
</form>
</div>
<div>
<div id="online_users"><li>List of online users:</li></div>
</div>
<!---public room chat begins here----->
<div id="chat" style="display: none;">
<ul id="messages"></ul>
<form action="">
<input id="msg" autocomplete="off" />
<button id="send" >Send</button>
</form>
</div>
<!---private chat begins here----->
<div id="private_chat" style="display: none;">
<p id="private_user">Private chat with: </p>
<div id="private_msg"></div>
<form action="">
<input id="p_msg" autocomplete="off" />
<button id="p_send" >Send private msg</button>
</form>
</div>
<script src="/socket.io/socket.io.js"></script>
<script src="jquery-2.1.0.js"></script>
<script>
$(document).ready(function(){
var socket = io('http://192.168.173.1:3000/');
$('#chat').hide();
$('#username').focus();
$('form').submit(function(e){
e.preventDefault();
});
var username = $('#username').val();
$('#join').click(function(){
var username = $('#username').val();
console.log('entered username '+username);
if(username !=''){
socket.emit('new_user', username);
$('#login').detach();
$('#chat').show();
$('#msg').focus();
}
});
$('#send').click(function(){
socket.emit('send_msg', $('#msg').val());
$('#msg').val('');
});
socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
});
socket.on('update_personal', function(status){
$('#messages').append($('<li>').text(status));
});
socket.on('update_users', function(names){
console.log(names);
if(true) {
$("#online_users").empty();
$.each(names, function(clientid, name) {
$('#online_users').append("<li><a href='#' id='"+name+"' name='"+name+"' class='private'> " + name + "</a></li>");
});
// $('#online_users').html("<li><a href='#' id='"+name+"' name='"+name+"' class='private'> " + name + "</a></li><br/>");
$('a.private').click(function(){
$('#private_chat').hide();
$('#private_chat').show();
var sender = username;
var recipient = $(this).attr('name');
console.log('name gotten is:'+recipient);
$('p#private_user').html('private chat with :'+ recipient);
$('#p_send').click(function(){
msg = $('#p_msg').val();
if(msg!=''){
recipient=recipient;
socket.emit('private_msg', msg,recipient,sender); // msg from sender, username of the sender, username of recipient
$('#p_msg').val('');
}else{$('#p_msg').val('please enter a valid msg');}
});
});
}
});
socket.on('received_p_msg', function(msg,sender,recipient){
$('#private_chat').show();
console.log('received privatemsg: '+msg);
$('#private_user').html('privatE chat with : '+ sender);
$('#private_msg').append($('<div>').html(msg+'</div>'));
//to continue chat after receiving initial private msg
$('#p_send').click(function(){
msg = $('#p_msg').val();
if(msg!=''){
socket.emit('private_msg', msg,sender,recipient); // msg from sender, username of the sender, username of recipient
$('#p_msg').val('');
}else{$('#p_msg').val('please enter a valid msg');}
$('#p_msg').val('');
});
});
socket.on("disconnect", function(){
$("#msgs").append("The server is not available");
});
});
</script>
</body>
</html>
检查室和socket.io文档中的命名空间，这应该解决您的问题的回复 – matteospampani 2014-09-02 20:10:13
谢谢，但我觉得你的回复有点含糊，因为对socket.io和node还是有点新鲜的，我真的很感激它，如果你能解释一下，非常感谢！:) – 2014-09-03 09:18:35
对不起，但现在我不能，我会解释它稍后会更好。以下是[在线演示]（http://socket.io/demos/chat/）的[源代码]（https://github.com/Automattic/socket.io/tree/master/examples/chat） 。希望它有帮助 – matteospampani 2014-09-03 09:31:08