Python socket Flow redirect Instance Rollup

Redirecting a socket stream to a standard input or output stream

#!/usr/bin/env python3 "" "Test Socket-stream redirect Mode" "Import sys,os,timefrom multiprocessing import processfrom socket        Import * def initlistenersocket (port=50008,host= "):" "Initializes the Socket" "" Sock=socket () try for the caller to listen for connections in server mode: Sock.bind ((host,port)) except OSError as E:print (' Address already in use ') os._exit (1) sock.list En (5) conn,addr=sock.accept () return conn def redirecout (port=50008,host= ' localhost '): "" "before accepting other connections fail, connect caller The standard output stream is to a socket, which is used for GUI listening, and after the listener starts, the caller "" "Sock=socket () Try:sock.connect ((host,port)) except Conn Ectionrefusederror as E:print (' connection refuse ') os._exit (1) file=sock.makefile (' W ') Sys.stdout=fil    E return sock def redirecin (port=50008,host= ' localhost '): "" "Connect caller standard input stream to socket" "" Sock=socket () for GUI to provide Try:sock.connect ((host,port)) except 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 is the client for the server: Send message, accept response reply "" "Sock=socket () Try:sock.connect ((host,port)) except Connectio Nrefusederror as E:print (' connection refuse ') os._exit (1) ofile=sock.makefile (' W ') Ifile=sock.makefil    E (' R ') Sys.stdout=ofile sys.stdin=ifile return sock def redirecbothasserver (port=50008,host= ' localhost '): "" " In this mode, the connection caller standard input and output stream to the same socket, the caller for the server is the service side: Accept the message, send Response "" "Sock=socket () Try:sock.bind (host,port )) except OSError as E:print (' Address already in use ') os._exit (1) sock.listen (5) conn,addr=sock.a Ccept () 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 CLI Ent2 (): Time.sleep (1) mypid=os.getpid () redirecin () for I in Range (3): Data=input () print (' Clien    T%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 (' Clie NT%s:%s '% (mypid,data)) Data=input () Sys.stderr.write (' client%s got [%s]\n '% (mypid,data)) def server4 (PO rt=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 c        Lient4 (): 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=initlistene        Rsocket () 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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