创建一个接受HTTPS的Java代理服务器

Question

我已经有一个工作正常的HTTP代理服务器，可以处理多个HTTP请求。现在我的问题是如何处理https请求？

这是我正在使用的简化代码：

class Daemon
{
    public static void main(String[] args)
    {
        ServerSocket cDaemonSocket = new ServerSocket(3128);

        while(true)
        {
          try
          {
             Socket ClientSocket = cDaemonSocket.accept();
             (new ClientHandler(ClientSocket )).start();
          }catch(Exception e) { }
        }
    }

}

和ClientHandler

class ClientHandler extends Thread
{
        private Socket socket = null;
        private Socket remoteSocket = null;
        private HTTPReqHeader request = null;
        ClientHandler(Socket socket)
        {
           this.socket = socket;
           request = new HTTPReqHeader();
           request.parse(socket); // I read and parse the HTTP request here
        }

       public void run()
       {
            if(!request.isSecure() )
            {
              remoteSocket = new Socket(request.url,request.port);
            }
            else
            {
              // now what should I do to established a secured socket?
            }

            // start connecting remoteSocket and clientSocket 
            ...........
       }
}

}

我确实确实尝试搜索过，但是遇到SSL隧道，证书，握手，SSLSocket，SSLFactory，trustStore等问题，但是仍然无法正常工作。我只需要知道我需要什么，以及建立与启用SSL的Web服务器的连接的步骤。

Answer 1

我终于明白了。

我只需要使用普通套接字，并向客户端发送一条消息，表明已建立连接。然后继续挖掘。

这是一个工作代码：

private Socket socket = null;
        private Socket remoteSocket = null;
        private HTTPReqHeader request = null;
        ClientHandler(Socket socket)
        {
           this.socket = socket;
           request = new HTTPReqHeader();
           request.parse(socket); // I read and parse the HTTP request here
        }

       public void run()
       {

            remoteSocket = new Socket(request.url,request.port);

            if(request.isSecure() )
            {
                 // send ok message to client
                 String ConnectResponse = "HTTP/1.0 200 Connection established\n" +
                                          "Proxy-agent: ProxyServer/1.0\n" +
                                          "\r\n";
                try
                {
           DataOutputStream out =  new DataOutputStream(socket.getOutputStream());
                   out.writeByte(ConnectResponse);
                    out.flush();
                } catch(Exception e) {}

            }

            // start connecting remoteSocket and clientSocket 
            ...........
       }

这是有关代理服务器如何处理CONNECT的很好的解释。 http://curl.haxx.se/rfc/draft-luotonen-web-proxy-
tunneling-01.txt