- How do you specify a TCP socket in Python?
by calling socket.socket, we initiate a socket. by giving it a SOCK_STREAM option, we specify that the socket is a TCP socket.
- What is the difference between a client socket and a server socket in Python?
Different socket options: server socket needs the port reuse option to keep listening on the same port. The client socket doesn't care about which port to use.
Different behaviour: server socket needs to bind to a port and host and start listening, while a client socket only needs to connect.
- How do we instruct the OS to let us reuse the same bind port?
by calling s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
- What information do we get about incoming connections?
the address of incoming connection, and the socket
- What is returned by recv() from the server after it is done sending the HTTP request?
None
python3 proxy_client.pyto start a multi-thread/process clientpython3 proxy_server.pyto start a forking server
proxy_client and proxy_server provides option to set the proxy host and port, using --host <hostname> --port <port>. Short hand is supported, too. For example, python3 proxy_client.py -H 127.0.0.1 -p 8001 tells the client to assume proxy server running at 127.0.0.1:8001