Python连接套接字进行处理

Question

I have a ( very ) simple web server I wrote in C and I want to test it. I wrote it so it takes data on stdin and sends out on stdout. How would I connect the input/output of a socket (created with socket.accept()) to the input/output of a process created with subprocess.Popen?

Sounds simple, right? Here's the killer: I'm running Windows.

Can anyone help?

Here's what I've tried:

1. Passing the client object itself as stdin/out to subprocess.Popen. (It never hurts to try.)
2. Passing socket.makefile() results as stdin/out to subprocess.Popen.
3. Passing the socket's file number to os.fdopen().

Also, in case the question was unclear, here's a slimmed-down version of my code:

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('', PORT))
sock.listen(5)
cli, addr = sock.accept()
p = subprocess.Popen([PROG])
#I want to connect 'p' to the 'cli' socket so whatever it sends on stdout
#goes to the client and whatever the client sends goes to its stdin.
#I've tried:
p = subprocess.Popen([PROG], stdin = cli.makefile("r"), stdout = cli.makefile("w"))
p = subprocess.Popen([PROG], stdin = cli, stdout = cli)
p = subprocess.Popen([PROG], stdin = os.fdopen(cli.fileno(), "r"), stdout = os.fdopen(cli.fileno(), "w"))
#but all of them give me either "Bad file descriptor" or "The handle is invalid".

Answer 1

I had the same issue and tried the same way to bind the socket, also on windows. The solution I came out with was to share the socket and bind it on the process to stdin and stdout . My solutions are completely in python but I guess that they are easily convertible.

import socket, subprocess

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('', PORT))
sock.listen(5)
cli, addr = sock.accept()

process = subprocess.Popen([PROG], stdin=subprocess.PIPE)
process.stdin.write(cli.share(process.pid))
process.stdin.flush()

# you can now use `cli` as client normally

And in the other process:

import sys, os, socket

sock = socket.fromshare(os.read(sys.stdin.fileno(), 372))
sys.stdin = sock.makefile("r")
sys.stdout = sock.makefile("w")

# stdin and stdout now write to `sock`

The 372 is the len of a measured socket.share call. I don't know if this is constant, but it worked for me. This is possible only in windows, as the share function is only available on that OS.