C语言 Web实时消息后台服务器推送技术---GoEasy

越来越多的项目需要用到实时消息的推送与接收,怎样用C语言实现最方便呢?我这里推荐大家使用GoEasy, 它是一款第三方推送服务平台,使用它的API可以轻松搞定实时推送!

浏览器兼容性:GoEasy推送 支持websocket 和polling两种连接方式,从而可以支持IE6及其以上的所有版本,同时还支持其它浏览器诸如Firefox, Chrome, Safari等等。

支持不同的开发语言:    GoEasy推送 提供了Restful API接口,无论你的后台程序用的是哪种语言都可以通过Restful API来实现后台实时推送。如:Java,PHP, C#, Ruby, Python, C, C++, ASP.NET,Node.js...

支持后台及前台推送: 后台用Restful API, 前台用goeasy.js; 运用十分简单!

 

C语言 Web实时消息后台服务器推送技术-GoEasy

 

下面我介绍一下使用GoEasy的步骤:

 

1. 你需要到goeasy官网上注册一个账号,并创建一个应用,应用创建好后系统会默认为它生成两个key: common key和subscribe key

 

2. 前台实时订阅及接收

    只需要引入goeasy.js,然后调用goeasy的subscribe方法订阅一个channel即可,订阅时无论是用common key还是subscribe key都可以。通过subscribe的参数 onMessage的回调函数可以实时接收到消息。

 

3. 前台实时推送

    还是需要引入goeasy.js(如果该页面已经引入了可不在引入),然后调用goeasy的publish方法向已订阅的channel上推送消息即可,推送时只能用common key。

 

4. 后台实时推送

// 新加坡rest-host:rest-singapore.goeasy.io
var url = "https://rest-hz.goeasy.io/v2/pubsub/publish";

var httpRequest = (HttpWebRequest)WebRequest.Create(url);
httpRequest.Method = "POST";
httpRequest.Accept = "application/json";
httpRequest.ContentType = "application/json";

var data = @"{
  ""appkey"": ""您的appkey"",
  ""channel"": ""test_channel"",
  ""content"": ""Hello, GoEasy!""
}";

using (var streamWriter = new StreamWriter(httpRequest.GetRequestStream()))
{
   streamWriter.Write(data);
}

var httpResponse = (HttpWebResponse)httpRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
   var result = streamReader.ReadToEnd();
}

Console.WriteLine(httpResponse.StatusCode);

 

就是这么简单。

下面我将之前写的一个小实例贴出来,里面用了Javascript 在web页面进行订阅,推送,接收,以及取消订阅的例子,里面的appkey用的是goeasy官方的demo 的appkey.

    <html>  
    <head>  
    <title>GoEasy Test</title>  
      
    <script type="text/javascript" src="https://cdn.goeasy.io/goeasy-2.13.2。min.js"></script>  
    <script type="text/javascript">  
        if(typeof GoEasy !== 'undefined'){  
            var goEasy = new GoEasy({  
                appkey: 'ba821151-e043-4dfb-a954-c73744c8d323',  
                userId:"222",  
                username:"22",  
                onConnected:function(){  
                    console.log("Connect to GoEasy success.");  
                } ,  
                onDisconnected:function(){  
                    console.log("Disconnect to GoEasy server.");  
                } ,  
                onConnectFailed:function(error){  
                    console.log("Connect to GoEasy failed, error code: "+ error.code+" Error message: "+ error.content);  
                }  
            });  
        }  
                  
        subscribe();  
        function subscribe(){  
                 goEasy.subscribe({  
                    channel: 'notification',  
                    onMessage: function(message){  
                        console.log('Meessage received:'+message.content);  
                    },  
                    onSuccess:function(){  
      
                        console.log("Subscribe the Channel successfully.");  
      
                    },  
      
                    onFailed: function(error){  
      
                        console.log("Subscribe the Channel failed, error code: "+ error.code + " error message: "+ error.content);  
      
                    }  
      
                });  
      
        }  
                  
         function publishMessage(){  
              goEasy.publish({  
                    channel: 'notification',  
                    message: 'You received a new notification',  
                    onSuccess:function(){  
      
                        console.log("Publish message success.");  
      
                    },  
                    onFailed: function(error){  
      
                        console.log("Publish message failed, error code: "+ error.code +" Error message: "+ error.content);  
      
                    }  
                });  
           
         }  
                        
         function unsubscribe(){  
                    goEasy.unsubscribe({  
                        channel:"notification",  
                        onSuccess: function(){  
      
                            console.log("Cancel Subscription successfully.");  
      
                        },  
                        onFailed: function(error){  
      
                            console.log("Cancel the subscrition failed, error code: "+ error.code + "error message: "+ error.content);  
                        }  
      
                    });  
                }  
              
     </script>  
    </head>  
    <body>  
      <input type="button" value="publish" onclick="publishMessage()"/>  
      <input type="button" value="unsubscribe" onclick="unsubscribe()"/>  
      <input type="button" value="subscribe" onclick="subscribe()"/>  
    </body>  
    </html>  

 

posted @ 2016-11-02 15:00  maolangong  阅读(1494)  评论(0编辑  收藏  举报