1.4socket服务器打印信息的四种不同方式(）

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def initListenerSocket(port=port):
    sock = socket(AF_INET,SOCK_STREAM)                   #创建TCP对象
    sock.bind((‘‘,port))                                 #绑定端口
    sock.listen(5)                                       #允许5个请求连接
    conn,addr = sock.accept()                            #返回socket对象
    return conn

def server1():
    mypid = os.getpid()                                  #获取系统进程
    conn = initListenerSocket()
    file = conn.makefile(‘r‘)                            #file interface wrapper
    for i in range(3):
        data = file.readline().rstrip()                  #读取之前客户端写入file的值
        print(‘Sever %s:%s‘%(mypid,data))                #当makefile(‘r‘)中为‘r‘时候，此时显示的是print值
server1()

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def redirectOut(port=serverPort, host=serverHost):
    sock = socket(AF_INET, SOCK_STREAM)
    sock.connect((host, port))
    file = sock.makefile(‘w‘)
    sys.stdout = file                                          #此时sys.stdout指向file,原始的 sys.stdout 指向控制台，如果把文件的对象的引用赋给 sys.stdout，那么 print 调用的就是文件对象的 write 方法
    return sock

def client1():
    mypid = os.getpid()
    redirectOut()
    for i in range(3):
        print(‘Client %s:%s+++++‘%(mypid,i))                   #当makefile(‘w‘)中为‘w‘时候，此时print不能打印，print后为写入file中的值
        sys.stdout.flush()                                     #每一次print都会输入刷新

client1()

# -*- coding: utf-8 -*-
import sys,os,multiprocessing
from socket import *

serverHost = ‘localhost‘
serverPort = 50007

def initListenerSocket(port=port):
    sock = socket(AF_INET,SOCK_STREAM)                   #创建TCP对象
    sock.bind((‘‘,port))                                 #绑定端口
    sock.listen(5)                                       #允许5个请求连接
    conn,addr = sock.accept()                            #返回socket对象
    return conn

def server2():
    mypid = os.getpid()
    conn = initListenerSocket()
    for i in range(3):
        conn.send((‘Sever %s:%s‘%(mypid,i)).encode())     #和下面的注释功能一样，但是下面不报EOF错误
        # ofile = conn.makefile(‘w‘)
        # sys.stdout=ofile
        # print((‘Sever %s:%s‘%(mypid,i)).encode())

server2()

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def redirectIn(port=serverPort, host=serverHost):
    sock = socket(AF_INET, SOCK_STREAM)
    sock.connect((host, port))
    file = sock.makefile(‘r‘)
    sys.stdin = file
    return sock

def client2():
    mypid = os.getpid()
    redirectIn()
    for i in range(3):
        data = input()                                         #input获取的是服务器发送过来的内容
        print(‘Client %s got [%s]‘%(mypid,data))               #打印信息，出现EOF错误，不知道为什么

client2()

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def initListenerSocket(port=port):
    sock = socket(AF_INET,SOCK_STREAM)                   #创建TCP对象
    sock.bind((‘‘,port))                                 #绑定端口
    sock.listen(5)                                       #允许5个请求连接
    conn,addr = sock.accept()                            #返回socket对象
    return conn


def server3():
    mypid = os.getpid()
    conn = initListenerSocket()
    file = conn.makefile(‘r‘)                             #读取之前客户端写入file的值
    for i in range(3):
        data = file.readline().rstrip()
        conn.send((‘Server %s got[%s]\n‘%(mypid,data)).encode())

server3()

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def redirectBothAsClient(port=serverPort,host=serverHost):
    sock = socket(AF_INET,SOCK_STREAM)
    sock.connect((host,port))
    ofile = sock.makefile(‘w‘)
    ifile = sock.makefile(‘r‘)
    sys.stdout = ofile
    sys.stdin = ifile
    return sock

def client3():
    mypid = os.getpid()
    redirectBothAsClient()
    for i in range(3):
        print(‘Client %s: %s‘%(mypid,i))                            #写入ofile，再传到服务器
        data = input()                                              #再传回来
        sys.stderr.write(‘Client %s got [%s]\n‘%(mypid,data))       #打印出来,这里不能用print打印
        #print(‘Client %s got [%s]\n‘%(mypid,data))

client3()

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def initListenerSocket(port=port):
    sock = socket(AF_INET,SOCK_STREAM)                   #创建TCP对象
    sock.bind((‘‘,port))                                 #绑定端口
    sock.listen(5)                                       #允许5个请求连接
    conn,addr = sock.accept()                            #返回socket对象
    return conn

def server5():
    mypid = os.getpid()
    conn = initListenerSocket()
    file = conn.makefile(‘r‘)
    for i in range(3):
        conn.send((‘Server %s got[%s]\n‘ % (mypid,i)).encode())
        data = file.readline().rstrip()
        print((‘Server %s got[%s]\n‘ % (mypid, data)))

server5()

# -*- coding: utf-8 -*- 
import sys,os,multiprocessing 
from socket import *


serverHost = ‘localhost‘
serverPort = 50007

def redirectBothAsClient(port=serverPort,host=serverHost):
    sock = socket(AF_INET,SOCK_STREAM)
    sock.connect((host,port))
    ofile = sock.makefile(‘w‘)
    ifile = sock.makefile(‘r‘)
    sys.stdout = ofile
    sys.stdin = ifile
    return sock

def client5():
    mypid = os.getpid()
    s = redirectBothAsClient()
    for i in range(3):
        data = input()
        print(‘Client %s got [%s]\n‘ % (mypid, data))
        sys.stdout.flush()          #每一次print都会输入刷新

client5()