本文将介绍使用ESfr a mework开发的一个入门Demo，该Demo演示了以下功能：

（1）客户端用户上下线时，通知其他在线用户。

（2）当客户端与服务端网络断开时，进行自动重连，当网络恢复后，重连成功。

（3）所有在线用户之间可以进行文字聊天。

（4）文件传送。

（5）P2P通道。

（6）消息同步调用。

（7）重登陆模式。当同名的用户登陆时，会把前面的用户挤掉。(This article will introduce an entry Demo developed by ESfr a mework, which demonstrates the following functions: Demo:



(1) when the client is downloaded, it will notify other online users.



(2) when the client and server end are disconnected, the connection is automatically reconnected. After the network is recovered, it is reconnected successfully.



(3) text chat can be performed between all online users.



(4) file transfer.



(5) P2P channel.



(6) message synchronization invocation.



(7) heavy landing mode. When the user with the same name is logged in, it will squeeze out the front users.)