Python在网络通讯方面功能强大,学习一下Socket通讯的基本方式
UDP通讯:
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import socket
port = 8081
s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
#从指定的端口,从任何发送者,接收UDP数据
s.bind(('',port))
print ( '正在等待接入...' )
while True :
#接收一个数据
data,addr = s.recvfrom( 1024 )
print ( 'Received:' ,data, 'from' ,addr)
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Client:
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import socket
port = 8081
host = 'localhost'
s = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.sendto(b 'hello,this is a test info !' ,(host,port))
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很简单 。下面是TCP方式:
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#-*- coding: utf-8 -*-
from socket import *
from time import ctime
HOST = ''
PORT = 12345
BUFSIZ = 1024
ADDR = (HOST, PORT)
sock = socket(AF_INET, SOCK_STREAM)
sock.bind(ADDR)
sock.listen( 5 )
while True :
print ( 'waiting for connection' )
tcpClientSock, addr = sock.accept()
print ( 'connect from ' , addr)
while True :
try :
data = tcpClientSock.recv(BUFSIZ)
except :
print (e)
tcpClientSock.close()
break
if not data:
break
s = 'Hi,you send me :[%s] %s' % (ctime(), data.decode( 'utf8' ))
tcpClientSock.send(s.encode( 'utf8' ))
print ([ctime()], ':' , data.decode( 'utf8' ))
tcpClientSock.close()
sock.close()
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Client:
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#-*- coding: utf-8 -*-
from socket import *
class TcpClient:
HOST = '127.0.0.1'
PORT = 12345
BUFSIZ = 1024
ADDR = (HOST, PORT)
def __init__( self ):
self .client = socket(AF_INET, SOCK_STREAM)
self .client.connect( self .ADDR)
while True :
data = input ( '>' )
if not data:
break
self .client.send(data.encode( 'utf8' ))
data = self .client.recv( self .BUFSIZ)
if not data:
break
print (data.decode( 'utf8' ))
if __name__ = = '__main__' :
client = TcpClient()
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上面的TCP方式有个问题,不能退出,好吧,我们改造一下,使这个程序可以发送quit命令以退出:
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#-*- coding: utf-8 -*-
from socket import *
from time import ctime
from time import localtime
import time
HOST = ''
PORT = 1122 #设置侦听端口
BUFSIZ = 1024
ADDR = (HOST, PORT)
sock = socket(AF_INET, SOCK_STREAM)
sock.bind(ADDR)
sock.listen( 5 )
#设置退出条件
STOP_CHAT = False
while not STOP_CHAT:
print ( '等待接入,侦听端口:%d' % (PORT))
tcpClientSock, addr = sock.accept()
print ( '接受连接,客户端地址:' ,addr)
while True :
try :
data = tcpClientSock.recv(BUFSIZ)
except :
#print(e)
tcpClientSock.close()
break
if not data:
break
#python3使用bytes,所以要进行编码
#s='%s发送给我的信息是:[%s] %s' %(addr[0],ctime(), data.decode('utf8'))
#对日期进行一下格式化
ISOTIMEFORMAT = '%Y-%m-%d %X'
stime = time.strftime(ISOTIMEFORMAT, localtime())
s = '%s发送给我的信息是:%s' % (addr[ 0 ],data.decode( 'utf8' ))
tcpClientSock.send(s.encode( 'utf8' ))
print ([stime], ':' , data.decode( 'utf8' ))
#如果输入quit(忽略大小写),则程序退出
STOP_CHAT = (data.decode( 'utf8' ).upper() = = "QUIT" )
if STOP_CHAT:
break
tcpClientSock.close()
sock.close()
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Client:
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#-*- coding: utf-8 -*-
from socket import *
class TcpClient:
#测试,连接本机
HOST = '127.0.0.1'
#设置侦听端口
PORT = 1122
BUFSIZ = 1024
ADDR = (HOST, PORT)
def __init__( self ):
self .client = socket(AF_INET, SOCK_STREAM)
self .client.connect( self .ADDR)
while True :
data = input ( '>' )
if not data:
break
#python3传递的是bytes,所以要编码
self .client.send(data.encode( 'utf8' ))
print ( '发送信息到%s:%s' % ( self .HOST,data))
if data.upper() = = "QUIT" :
break data = self .client.recv( self .BUFSIZ)
if not data:
break
print ( '从%s收到信息:%s' % ( self .HOST,data.decode( 'utf8' )))
if __name__ = = '__main__' :
client = TcpClient()
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注:以上代码为Python3。
总结
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原文链接:http://www.cnblogs.com/GarfieldTom/archive/2012/12/16/2820143.html