用VC++6.0编写Proxy服务器



一． 原理



　　本程序的结构原理如下：



　　对于每一个用户的请求（Internet 请求，由浏览器发出），本程序将启动两个线程，一个把本地用户的请求数据发送到远程的Internet主机，另一个线程把远程主机的回应数据发送到本地请求用户。



　　二． 主要函数



　　UserToProxyThread ( void * pParam ) ：它是用来把本地用户请求数据发送到远程主机的，起服务器线程角色。当接到本地（局域网）用户的请求，它就启动另一个自身线程，以侦听别的用户的请求，并读出已接收到的请求数据，接着启动第二个线程ProxyToServer()（这个线程用来连接远程主机），当远程主机连接成功后，它把已读出的本地用户请求数据发送到远程主机。



　　ProxyToServer ( void * pParam) ，可以被当作是客户端服务，它把远程主机发送来的数据分发给本地请求用户。

　　三． 开发运行环境

　　本程序是在VC++6.0环境下开发的，在Win95 和 WinNT4.0下运行正常。 -Prepared using VC++6.0 Proxy server



The principle of a.



The program s structure principle is as follows:



For every user s request ( Internet request, issued by the browser ), the program will start two threads, a local user requests to send data to the remote Internet host, another thread to the remote host response data is sent to a local request user.



Two main functions.



UserToProxyThread ( void* pParam ): it is used to put the local user request data sent to the remote host, server thread role. When receiving the local ( local area network) a user s request, it will start another own thread, to listen to the other user s request, and read out the received request data, and then start second threads ( ProxyToServer ) ( the thread used to connect to remote host ), when the remote host connection is successful, it has been read local user request data sent to remote host.



ProxyToServer ( void* pParam ), can be client service, it put the remote host to send data distri