最近在搞一个直播项目需要聊天服务器，之前是以小打小闹来做的，并没有想太多就只有一台服务器。前几天一下子突然来了5000人，服务器瞬间gg，作为开发人员的我很尴尬！ 这就是我们这篇文章的背景。
我使用的是C# Mvc4.0 来开发的，这里还需要一个redis 至于你是windows版本还是Linux版本我就不管了，反正是要有个地址一个端口，密码根据实际情况填写。
我这里用一个demo来展现分布式的情况https://git.oschina.net/908Sharp/signalR-multi-Server.git
第一步：新建两mvc项目
从nuget 中添加以下几个包
Install-Package Microsoft.AspNet.SignalR
Install-Package Microsoft.AspNet.SignalR.Redis
install-package Microsoft.Owin.Cors
第二步：在App_Start目录中添加Owin StartUp类
public void Configuration(IAppBuilder app)
{
GlobalHost.DependencyResolver.UseRedis("127.0.0.1", 6379, string.Empty, "SignalRBus");
app.Map("/signalr", map =>
{
map.UseCors(CorsOptions.AllowAll);
var hubConfiguration = new HubConfiguration
{
EnableJSONP = true
};
map.RunSignalR(hubConfiguration);
});
}
注意引用的包啊，骚年们。
第三步：添加ChatHub 类
[HubName("chat")]
public class ChatHub:Hub
{
public void Chat(string msg)
{
Clients.All.Display("Receive Msg:" + msg);
}
}
后端就算完成了。
第四步：前端页面的创建
<div id="chat-content"></div>
<input type="text" id="msg" name="name" value="" placeholder="请输入聊天内容"/>
<input type="button" id="btn" name="name" value="发送" />
<script src="/Scripts/jquery-1.10.2.min.js"></script>
<script src="/Scripts/jquery.signalR-2.2.1.js"></script>
<script src="/Scripts/hub.js"></script>
<script>
/*
signalr
1、初始化聊天服务器
*/
conn = $.hubConnection();
conn.qs = {
};
conn.start().done(function () {
console.log('signalr success');
$('#btn').click(function () {
var msg = $('#msg').val();
chat.invoke("Chat", msg)
.done(function () {
console.log('signalr send success');
$('#msg').val('');
})
.fail(function (e) {
console.log('signalr send fail');
});
})
});
chat = conn.createHubProxy("chat");
chat.on("Display", function (msg) {
$('#chat-content').html($('#chat-content').html() + '<br/>' + msg)
});
</script>
记住我上面说的demo是两个站哦，代码都一样的，正式环境的时候我们肯定是一份代码在不同服务器上部署，指向同一个redis地址
最后我说一下<script src="/Scripts/hub.js"></script> 这个东西是自动生成的，你也可以手动指定，我还是把代码贴出来吧。你也可以F12自己去看。
/*!
* ASP.NET SignalR JavaScript Library v2.2.1
* http://signalr.net/
*
* Copyright (c) .NET Foundation. All rights reserved.
* Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
*
*/
/// <reference path="..\..\SignalR.Client.JS\Scripts\jquery-1.6.4.js" />
/// <reference path="jquery.signalR.js" />
(function ($, window, undefined) {
/// <param name="$" type="jQuery" />
"use strict";
if (typeof ($.signalR) !== "function") {
throw new Error("SignalR: SignalR is not loaded. Please ensure
jquery.signalR-x.js is referenced before ~/signalr/js.");
}
var signalR = $.signalR;
function makeProxyCallback(hub, callback) {
return function () {
// Call the client hub method
callback.apply(hub, $.makeArray(arguments));
};
}
function registerHubProxies(instance, shouldSubscribe) {
var key, hub, memberKey, memberValue, subscriptionMethod;
for (key in instance) {
if (instance.hasOwnProperty(key)) {
hub = instance[key];
if (!(hub.hubName)) {
// Not a client hub
continue;
}
if (shouldSubscribe) {
// We want to subscribe to the hub events
subscriptionMethod = hub.on;
} else {
// We want to unsubscribe from the hub events
subscriptionMethod = hub.off;
}
// Loop through all members on the hub and find client hub functions to subscribe/unsubscribe
for (memberKey in hub.client) {
if (hub.client.hasOwnProperty(memberKey)) {
memberValue = hub.client[memberKey];
if (!$.isFunction(memberValue)) {
// Not a client hub function
continue;
}
subscriptionMethod.call(hub, memberKey, makeProxyCallback(hub, memberValue));
}
}
}
}
}
$.hubConnection.prototype.createHubProxies = function () {
var proxies = {};
this.starting(function () {
// Register the hub proxies as subscribed
// (instance, shouldSubscribe)
registerHubProxies(proxies, true);
this._registerSubscribedHubs();
}).disconnected(function () {
// Unsubscribe all hub proxies when we "disconnect". This
is to ensure that we do not re-add functional call backs.
// (instance, shouldSubscribe)
registerHubProxies(proxies, false);
});
proxies['chat'] = this.createHubProxy('chat');
proxies['chat'].client = {};
proxies['chat'].server = {
send: function (message) {
return proxies['chat'].invoke.apply(proxies['chat'], $.merge(["send"], $.makeArray(arguments)));
},
sendOne: function (toUserId, message) {
return proxies['chat'].invoke.apply(proxies['chat'], $.merge(["sendOne"], $.makeArray(arguments)));
}
};
return proxies;
};
signalR.hub = $.hubConnection("/signalr", { useDefaultPath: false });
$.extend(signalR, signalR.hub.createHubProxies());
}(window.jQuery, window));
这一块是你要是想指定具体路径也是可以的哦，但是要在后台写这么一句话
结束。
我也刚刚写完，还没有放到正式环境去用，哈哈哈，捂嘴偷笑，吐血了吗？ 现在我担心我们windows版本的redis不稳定。
作者：yangxing
来源：51CTO