Python socket stream redirection instance summary, python redirection

Python socket stream redirection instance summary, python redirection

Redirects a socket stream to a standard input or output stream.

#! /Usr/bin/env python3 "test socket-stream redirection mode" import sys, OS, timefrom multiprocessing import Processfrom socket import * def initListenerSocket (port = 50008, host = ''):" initialize the socket used by the caller to listen for connection in server mode "" sock = socket () try: sock. bind (host, port) handle T OSError as e: print ('address already in use') OS. _ exit (1) sock. listen (5) conn, addr = sock. accept () return conn def redirecOut (port = 50008, host = 'localhost, this socket is used for gui listening. After the listener starts, the caller "sock = socket () try: sock. connect (host, port) does t ConnectionRefusedError as e: print ('Connection refuse') OS. _ exit (1) file = sock. makefile ('W') sys. stdout = file return sock def redirecIn (port = 50008, host = 'localhost '): "Connect the caller's standard input stream to the socket provided by the gui" sock = socket () try: sock. connect (host, port) does t ConnectionRefusedError as e: print ('conenction refuse') OS. _ exit (1) file = sock. makefile ('R') sys. stdin = file return sock def redirecBothAsClient (port = 50008, host = 'localhost'): "In this mode, connect the caller standard input and output streams to the same socket caller for the server is the client: send a message, accept the response "" sock = socket () try: sock. connect (host, port) does t ConnectionRefusedError as e: print ('Connection refuse') OS. _ exit (1) ofile = sock. makefile ('W') ifile = sock. makefile ('R') sys. stdout = ofile sys. stdin = ifile return sock def redirecBothAsServer (port = 50008, host = 'localhost'): "In this mode, connect the caller's standard input and output streams to the same socket, the caller is the server for the server: receives the message and sends a response "" sock = socket () try: sock. bind (host, port) handle T OSError as e: print ('address already in use') OS. _ exit (1) sock. listen (5) conn, addr = sock. accept () ofile = conn. makefile ('W') ifile = conn. makefile ('R') sys. stdout = ofile sys. stdin = ifile return conn def server1 (): mypid = OS. getpid () conn = initListenerSocket () file = conn. makefile ('R') for I in range (3): data = file. readline (). rstrip () print ('server % s got [% s] '% (mypid, data) def client1 (): time. sleep (1) mypid = OS. getpid () redirecOut () for I in range (3): print ('client: % s: % s' % (mypid, I) sys. stdout. flush () def server2 (): mypid = OS. getpid () conn = initListenerSocket () for I in range (3): conn. send ('server % s got [% s] \ n' % (mypid, I )). encode () def client2 (): time. sleep (1) mypid = OS. getpid () redirecIn () for I in range (3): data = input () print ('client % s got [% s] '% (mypid, data )) def server3 (): mypid = OS. getpid () conn = initListenerSocket () file = conn. makefile ('R') for I in range (3): data = file. readline (). rstrip () conn. send ('server % s got [% s] \ n' % (mypid, data )). encode () def client3 (): time. sleep (1) mypid = OS. getpid () redirecBothAsClient () for I in range (3): print ('client % s: % s' % (mypid, data) data = input () sys. stderr. write ('client % s got [% s] \ n' % (mypid, data) def server4 (port = 50008, host = 'localhost'): mypid = OS. getpid () sock = socket () try: sock. connect (host, port) ConnectionRefusedError as e: print ('Connection refuse') OS. _ exit (1) file = sock. makefile ('R') for I in range (3): sock. send ('server % s: % S \ n' % (mypid, I )). encode () data = file. readline (). rstrip () print ('server % s got [% s] '% (mypid, data) def client4 (): time. sleep (1) mypid = OS. getpid () redirecBothAsServer () for I in range (3): data = input () print ('client % s got [% s] '% (mypid, data) sys. stdout. flush () def server5 (): mypid = OS. getpid () conn = initListenerSocket () file = conn. makefile ('R') for I in range (3): conn. send ('server % s: % s \ n' % (mypid, I )). encode () data = file. readline (). rstrip () print ('server % s got [% s] '% (mypid, data) def client5 (): mypid = OS. getpid () s = redirecBothAsClient () for I in range (3): data = input () print ('client % s got [% s] '% (mypid, data )) sys. stdout. flush () def main (): server = eval ('server' + sys. argv [1]) client = eval ('client' + sys. argv [1]) Process (target = server ). start () client () if _ name __= = '_ main _': main ()

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