基于 XMPP协议的服务器端 文件互传的简单实现 (转)

it2025-03-23  25

 

         昨天我们讲了客户端实现用户互发消息的原理,今天我们继续学习一下基于XMPP协议的文件传输,首先我们假设用户已经登录,这里我们假设Clinet Send对Clinet Receive 发送文件,这里记录了Clinet Send的发送和接收XML流记录 1、发送请求表示要向Clinet test发送文件,并发送文件大小和文件名 SEND:  < iq  xmlns ="jabber:client"  id ="agsXMPP_6"  to ="Receive @localhost/"  type ="set" >< si  xmlns ="http://jabber.org/protocol/si"  profile ="http://jabber.org/protocol/si/profile/file-transfer"  id ="b3b5f49c-8a94-49e2-908a-3de694b98af0" >< file  xmlns ="http://jabber.org/protocol/si/profile/file-transfer"  name ="MiniClient.exe.config"  size ="382" >< range  /></ file >< feature  xmlns ="http://jabber.org/protocol/feature-neg" >< xmlns ="jabber:x:data"  type ="form" >< field  type ="list-single"  var ="stream-method" >< option >< value > http://jabber.org/protocol/byReceive reams </ value ></ option ></ field ></ x ></ feature ></ si ></ iq > 2、Receive 收到Send发实来的请求后,发送出响应流 RECV:  < iq  xmlns ="jabber:client"  to ="Send@localhost"  type ="result"  id ="agsXMPP_6" >< si  xmlns ="http://jabber.org/protocol/si"  id ="b3b5f49c-8a94-49e2-908a-3de694b98af0" >< feature  xmlns ="http://jabber.org/protocol/feature-neg" >< xmlns ="jabber:x:data"  type ="submit" >< field  var ="stream-method" >< value > http://jabber.org/protocol/byReceive reams </ value ></ field ></ x ></ feature ></ si ></ iq > 3、Send收到Receive 愿意接收的响应后,发出如下XML流 SEND:  < iq  xmlns ="jabber:client"  id ="agsXMPP_7"  to ="Receive@localhost"  type ="set" >< query  xmlns ="http://jabber.org/protocol/bySendreams"  sid ="71f1b875-4d84-429c-b39d-7dabcd400f3d" >< streamhost  jid ="Send@localhost/MiniClient"  host ="localhost"  port ="1000"   />< streamhost  jid ="proxy.ag-software.de"  host ="proxy.ag-software.de"  port ="7777"   /></ query ></ iq >

注意这里注要是代理的设置,agsXMPP 自带的客户端是使用代理传输数据的,所以必须对其做相应的修改,使其支持局域网内支持发送文件. 下面我们来看一下服务器端是如何路由消息的呢? 从上面所发送的XML流我们可以看出,实际上用户传送文件所发送的都是IQ节,我们必须对IQ节进行路由才能使其找到相应的接收者 ,所以我们需要在XmppServerConnection类中添加如下代码:  

private   void  ProcessIQ(IQ iq)         { // 传送文件得理    if  (iq.Query  ==   null )             {                  if (iq.Type  ==  IqType.result)                      this .Send(iq);                 ProcessOobIQ(iq);             }              else              if  (iq.Query.GetType()  ==   typeof (Auth))             {                 Auth auth  =  iq.Query  as  Auth;                  this .Username  =  auth.Username.ToString();                  switch  (iq.Type)                 {                      case  IqType. get :                         iq.SwitchDirection();                         iq.Type  =  IqType.result;                         auth.AddChild( new  Element( " password " ));                         auth.AddChild( new  Element( " digest " ));                         Send(iq);                          break ;                      case  IqType. set :                          //  Here we should verify the authentication credentials                          if  (AccountBus.CheckLogin(auth.Username, auth.Digest,  this .SessionId))                         {                             iq.SwitchDirection();                             iq.Type  =  IqType.result;                             iq.Query  =   null ;                             Send(iq);                             Console.WriteLine(auth.Username  +   " 登录了 "   +   "    登录时间: "   +  System.DateTime.Now.ToString());                         }                          else                         {                            //   iq.SwitchDirection();                             iq.Type  =  IqType.error;                             iq.Query  =   null ;                             Send(iq);                         }                          break ;                 }             }              else   if  (iq.Query.GetType()  ==   typeof (Roster))             {                 ProcessRosterIQ(iq);             } // 用代理传送文件处理              else   if (iq.Query.FirstChild  != null )             {                 //  iq.SwitchDirection();                 //   // iq.Type = IqType.result;                 //   // Send(iq);                 //  iq.Type = IqType.set;                  // this.Send(iq);                 ProcessOobIQ(iq);             } } 传送文件载图: 这里我们讲解完了服务器是如何处理用户互传文件,以后我将继续讲解客户端的实现原理.          这篇文章本来是昨晚上写好的,但由于源码留在公司了,所以今早上才贴出来。

转载于:https://www.cnblogs.com/HappyQQ/archive/2008/01/12/1036587.html

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