python 长链接

python_long_socket.py

#coding=utf-8
'''''
socket 给百度发送http请求

连接成功后，发送http的get请求，所搜索功能

'''
import socket
import sys
import time
if __name__=='__main__':
    #创建套接字
    try :
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    except socket.eorror,e:
        print 'socket false:%s'%e
    print 'socket ...'

    #连接百度ip
    try :
        sock.connect(('220.181.111.148',80))
    except socket.error,e:
        print 'connect false %s'%e
        sock.close()
    print 'connect ...'

    #发送百度首页面请求并且保持连接
    try :
        print 'send start...'
        str='GET / HTTP/1.1\r\nHost:www.baidu.com\r\nConnection:keep-alive\r\n\r\n'
        sock.send(str)
    except socket.eorror,e:
        print 'send false'
        sock.close()

    data=''
    data = sock.recv(1024)
    while (1):
        print data
        beg = data.find('Content-Length:',0,len(data))
        end = data.find('Content-Type:',0,len(data))
        print beg
        print end
        if(beg == end):
            print 'connecting closed'
            break
        num = long(data[beg+16:end-2])
        print num
        nums = 0
        while (1):
            data=sock.recv(1024)
            print data
            nums +=len(data)
            if(nums >= num):
                break
        word = raw_input('please input your word----->')
        str='''''GET /s?wd=''' + word + ''''' HTTP/1.1
Host:www.baidu.com
Connection: Keep-Alive

'''
        print str
        sock.send(str)
        data = ''
        data = sock.recv(1024)
    sock.close()
    print data