Vik*_*amK 14 redis node.js socket.io
我正在创建一个聊天应用程序,使用户可以进行私人聊天和群聊.计划为此应用程序使用以下技术: -
NodeJs + Socket.io + Redis + CouchDB(存储消息历史记录)+ AngularJS
根据我最初的研究使用Redis作为PubSub服务是比使用Socket.io作为pub-sub的更好的方法.这是因为如果不同的用户连接到不同的服务器实例,那么在这种情况下使用套接字将产生问题,因为消息发送方式用户1不会传递给用户2(连接到服务器1的用户1和连接到服务器2的用户2).
但是如果我们使用Redis,那么根据我的理解,我们必须创建新的频道以启用私人聊天.而且他们对Redis的10k频道有限制.
我怀疑是
此致,维克拉姆
Vik*_*amK 18
阅读下面的文章/博客文章后,使用Redis for pub/sub over socket.io pub/sub将有助于提高可扩展性和性能.
https://github.com/sayar/RedisMVA/blob/master/module6_redis_pubsub/README.md
https://github.com/rajaraodv/redispubsub
此外,我可以使用redis在私人聊天中创建快速POC.这是代码: -
var app = require('http').createServer(handler);
app.listen(8088);
var io = require('socket.io').listen(app);
var redis = require('redis');
var redis2 = require('socket.io-redis');
io.adapter(redis2({ host: 'localhost', port: 6379 }));
var fs = require('fs');
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);
console.log("Listening on port 8088");
res.end(data);
});
}
var store = redis.createClient();
var pub = redis.createClient();
var sub = redis.createClient();
sub.on("message", function (channel, data) {
data = JSON.parse(data);
console.log("Inside Redis_Sub: data from channel " + channel + ": " + (data.sendType));
if (parseInt("sendToSelf".localeCompare(data.sendType)) === 0) {
io.emit(data.method, data.data);
}else if (parseInt("sendToAllConnectedClients".localeCompare(data.sendType)) === 0) {
io.sockets.emit(data.method, data.data);
}else if (parseInt("sendToAllClientsInRoom".localeCompare(data.sendType)) === 0) {
io.sockets.in(channel).emit(data.method, data.data);
}
});
io.sockets.on('connection', function (socket) {
sub.on("subscribe", function(channel, count) {
console.log("Subscribed to " + channel + ". Now subscribed to " + count + " channel(s).");
});
socket.on("setUsername", function (data) {
console.log("Got 'setUsername' from client, " + JSON.stringify(data));
var reply = JSON.stringify({
method: 'message',
sendType: 'sendToSelf',
data: "You are now online"
});
});
socket.on("createRoom", function (data) {
console.log("Got 'createRoom' from client , " + JSON.stringify(data));
sub.subscribe(data.room);
socket.join(data.room);
var reply = JSON.stringify({
method: 'message',
sendType: 'sendToSelf',
data: "Share this room name with others to Join:" + data.room
});
pub.publish(data.room,reply);
});
socket.on("joinRooom", function (data) {
console.log("Got 'joinRooom' from client , " + JSON.stringify(data));
sub.subscribe(data.room);
socket.join(data.room);
});
socket.on("sendMessage", function (data) {
console.log("Got 'sendMessage' from client , " + JSON.stringify(data));
var reply = JSON.stringify({
method: 'message',
sendType: 'sendToAllClientsInRoom',
data: data.user + ":" + data.msg
});
pub.publish(data.room,reply);
});
socket.on('disconnect', function () {
sub.quit();
pub.publish("chatting","User is disconnected :" + socket.id);
});
});
HTML代码
<html>
<head>
<title>Socket and Redis in Node.js</title>
<script src="/socket.io/socket.io.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
</head>
<body>
<div id="username">
<input type="text" name="usernameTxt" />
<input type="button" name="setUsername" value="Set Username" />
</div>
<div id="createroom" style="display:none;">>
<input type="text" name="roomNameTxt" />
<input type="button" name="setRooomName" value="Set Room Name" />
<input type="button" name="joinRooomName" value="Join" />
</div>
<div id="sendChat" style="display:none;">
<input type="text" name="chatTxt" />
<input type="button" name="sendBtn" value="Send" />
</div>
<br />
<div id="content"></div>
<script>
$(document).ready(function() {
var username = "anonymous";
var roomname = "anonymous";
$('input[name=setUsername]').click(function(){
if($('input[name=usernameTxt]').val() != ""){
username = $('input[name=usernameTxt]').val();
//var msg = {type:'setUsername',user:username};
socket.emit('setUsername',{user:username});
}
$('#username').slideUp("slow",function(){
$('#createroom').slideDown("slow");
});
});
$('input[name=setRooomName]').click(function(){
if($('input[name=roomNameTxt]').val() != ""){
roomname = $('input[name=roomNameTxt]').val();
socket.emit('createRoom',{user:username,room:roomname});
}
$('#createroom').slideUp("slow",function(){
$('#sendChat').slideDown("slow");
});
});
$('input[name=joinRooomName]').click(function(){
if($('input[name=roomNameTxt]').val() != ""){
roomname = $('input[name=roomNameTxt]').val();
socket.emit('joinRooom',{room:roomname});
}
$('#createroom').slideUp("slow",function(){
$('#sendChat').slideDown("slow");
});
});
var socket = new io.connect('http://localhost:8088');
var content = $('#content');
socket.on('connect', function() {
console.log("Connected");
});
socket.on('message', function(message){
//alert('received msg=' + message);
content.append(message + '<br />');
}) ;
socket.on('disconnect', function() {
console.log('disconnected');
content.html("<b>Disconnected!</b>");
});
$("input[name=sendBtn]").click(function(){
var msg = {user:username,room:roomname,msg:$("input[name=chatTxt]").val()}
socket.emit('sendMessage',msg);
$("input[name=chatTxt]").val("");
});
});
</script>
</body>
</html>
| 归档时间： |
|
| 查看次数： |
17077 次 |
| 最近记录： |