python简单socket

#! /usr/bin/env python
# -*-coding: utf-8-*-
#这段代码是clinet端

import socket   #for sockets
import sys  #for exit

try:
#create an AF_INET, STREAM socket (TCP)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error, msg:
print 'Failed to create socket. Error code: ' + str(msg[0]) + ' , Error message : ' + msg[1]
sys.exit();

print 'Socket Created'

host = '192.168.1.20'
port = 8888

try:
remote_ip = socket.gethostbyname( host )

except socket.gaierror:
#could not resolve
print 'Hostname could not be resolved. Exiting'
sys.exit()

print 'Ip address of ' + host + ' is ' + remote_ip

#Connect to remote server
s.connect((remote_ip , port))

print 'Socket Connected to ' + host + ' on ip ' + remote_ip

#! /usr/bin/env python
# -*- coding: utf-8 -*-

import socket
import sys
from thread import *

HOST = ''   # Symbolic name meaning all available interfaces
PORT = 8888 # Arbitrary non-privileged port

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Socket created'

#Bind socket to local host and port
try:
s.bind((HOST, PORT))
except socket.error , msg:
print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
sys.exit()

print 'Socket bind complete'

#Start listening on socket
s.listen(10)
print 'Socket now listening'

#Function for handling connections. This will be used to create threads
def clientthread(conn):
#Sending message to connected client
conn.send('Welcome to the server. Type something and hit enter\n') #send only takes string

#infinite loop so that function do not terminate and thread do not end.
while True:

#Receiving from client
data = conn.recv(1024)
reply = 'OK...' + data
if not data:
break

conn.sendall(reply)

#came out of loop
conn.close()

#now keep talking with the client
while 1:
#wait to accept a connection - blocking call
conn, addr = s.accept()
print 'Connected with ' + addr[0] + ':' + str(addr[1])

#start new thread takes 1st argument as a function name to be run, second is the tuple of arguments to the function.
start_new_thread(clientthread ,(conn,))

s.close()