摘要：網絡編程學習本文主要介紹網絡通信，以及的通信例子網絡通信是嵌套字的意思，可以理解為與們間的在線會話。關于通信可以看這里簡單理解多線程下開啟一個對于服務端，需要做件事情開啟設置配置綁定端口幀監聽，收發包多線程關于報錯模塊提供個函數。

  
http://homeway.me/

socket是嵌套字的意思，可以理解為server與client們間的在線會話。

關于socket通信可以看這里：

http://queengina.com/2014/10/09/簡單理解Socket/

對于server服務端，python socket需要做4件事情

1.開啟socket

2.設置配置socket

3.綁定端口

4.幀監聽，收發包

  
=> server.py

#!/usr/bin/python
# -*- coding:utf-8 -*-
import socket 
import threading 
import time
import sys

clients = [] 
class RecvMsg(threading.Thread): 
    def __init__(self, sock): 
        threading.Thread.__init__(self) 
        self.sock = sock 
    def run(self): 
        global clients 
        while True: 
            msg = self.sock.recv(512) 
            print "recv=>",msg 
            for client in clients: 
                if client != self.sock:
                    message = {}
                    message["id"] = self.sock
                    message["time"] = time.time()
                    message["type"] = "server send"
                    print "send=>", message
                    client.send( str(message) )
                    pass
                pass

def main( port ): 
    sock = socket.socket() 
    sock.bind(( socket.gethostname(), int(port) )) 
    sock.listen(5) 
    while True: 
        client, address = sock.accept() 
        print "a client connected" 
        if client not in clients: 
            clients.append(client) 
            recvMsg = RecvMsg(client)
            recvMsg.start() 
    sock.close() 

if __name__ == "__main__": 
    port = sys.argv[1]
    main( port ) 

  
python server.py 56565

  
=> client.py

#!/usr/bin/python
# -*- coding:utf-8 -*-
import socket  
import threading 
import os,time 
import sys

class RecvMsg(threading.Thread): 
    def __init__(self, sock): 
        threading.Thread.__init__(self) 
        self.sock = sock 

    def run(self): 
        while True: 
            recvMsg = self.sock.recv(512) 
            print "recv=>",recvMsg 

def sendMsg(sock): 
    msg = time.time()
    message = {} 
    message["id"] = os.getpid() 
    message["msg"] = msg 
    print "send=>", message 
    sock.send(str(message)) 

def main( port ): 
    sock = socket.socket() 
    sock.connect(( socket.gethostname(), int(port) )) 
    recvMsg = RecvMsg(sock) 
    recvMsg.start() 
    while True:
        time.sleep(1.5) 
        sendMsg(sock) 

if __name__ == "__main__":
    port = sys.argv[1] 
    main( port ) 

  
python client.py 56565

socket模塊提供4個error函數。

1.關于一般I/O和通信有關的問題 socket.error

2.與查詢地址有關 socket.gaierror

3.與其他地址錯誤有關 socket.herror

4.與上個socket調用timeout有關 socket.timeout

#!/usr/bin/python
# -*- coding:utf-8 -*-
from socket import *
import time,sys

HOST = socket.gethostname()
PORT = sys.argv[0] 
BUFSIZ = 1024
ADDR = ( HOST, int(PORT) )

SerSock = socket(AF_INET, SOCK_STREAM)

try:
    SerSock.bind(ADDR)
except socket.error, e:
    print "socket.error=>",e
except socket.gaierror, e:
    print "socket.gaierror=>",e
except socket.herror, e:
    print "socket.herror=>",e

SerSock.listen(5)

while True:
    print "waiting for message..."
    CliSock, addr = tcpSerSock.accept()
    print "...connect from :", addr
    while True:
        data = CliSock.recv(BUFSIZ)
        if not data:
            break
        CliSock.send("[%s] %s" % (time.ctime(), data))
    CliSock.close()
SerSock.close()

  
python error.py 54545

本文出自 夏日小草,轉載請注明出處: http://homeway.me/2014/10/21/python-socket-1/

-by小草

2014-10-21 22:34:54