python套接字流重定向实例汇总

将套接字流重定向到标准输入或输出流

#!/usr/bin/env python3
"""
测试socket-stream 重定向模式
"""
import sys,os,time
from multiprocessing import Process
from socket import *

def initListenerSocket(port=50008,host=''):
    """ 
    初始化在服务器模式下调用者用于监听连接的套接字
    """
    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.accept()
    return conn

def redirecOut(port=50008,host='localhost'):
    """ 
    在接受之前其他连接都失败，连接调用者标准输出流
    到一个套接字，这个套接字用于gui监听,在收听者启动后，启动调用者
    """
    sock=socket()
    try:
        sock.connect((host,port))
    except ConnectionRefusedError as e:
        print('connection refuse')
        os._exit(1)
    file=sock.makefile('w')
    sys.stdout=file
    return sock

def redirecIn(port=50008,host='localhost'):
    """ 
    连接调用者标准输入流到用于gui来提供的套接字
    """
    sock=socket()
    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'):
    """
    在这种模式下，连接调用者标准输入和输出流到相同的套接字
    调用者对于服务器来说就是客户端:发送消息，接受响应答复
    """
    sock=socket()
    try:
        sock.connect((host,port))
    except 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'):
    """
    在这种模式下，连接调用者标准输入和输出流到相同的套接字，调用者对于
    服务器来说就是服务端：接受消息，发送响应答复
    """
    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.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: %Sn' %(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:%sn' %(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()