When we want create HTTP connection through proxy server, the client sends a request to the proxy server using HTTP protocol CONNECT method that it wants to establish a connection to some host (Destination) on some port. Now proxy server if allows tries to establish a connection to destination host by sending a request on behalf of client and receives the response which in turns send it back to client. If the negative response is received from destination it sends negative HTTP response to the client and closes the connection. And if the positive response is received, it sends a positive HTTP response to the client and the connection is considered to be established. Now the proxy server is acting as a Tunnel and dose not care what data is transferring between client and destination. Due to lack of time I have not tested it 100 , if you find any bug please email me so that I can rectify it.