微信PC版协议实现：
1.获取服务器分配的一个唯一会话ID
2.通过会话ID获得随机登录二维码
3.轮询手机端是否已经扫描二维码并确认
4.访问登录地址，获得uin和sid
5.初始化微信信息获得当前用户的信息
6.获得所有的好友列表
7.保持与服务器的信息同步
8.获得别人发来的消息
9.向用户发送消息(Implementation of WeChat PC version protocol:
1. get a unique session ID server allocation
2. access random access QR code through session ID
3. mobile phone terminal polling have to scan two-dimensional code and confirm
4. access login address, access to UIN and SID
Get the current user of WeChat 5. initialization information
6. get all friends list
7. keep the information synchronized with the server
8. get news from others
9. send messages to users)