『壹』 python 如何建立socket長連接
#coding=gbk
'''''
socket 給網路發送http請求
連接成功後，發送http的get請求，所搜索功能
'''
import socket
import sys
import time
if __name__=='__main__':
#創建套接字
try :
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.eorror,e:
print 'socket false:%s'%e
print 'socket ...'
#連接網路ip
try :
sock.connect(('220.181.111.148',80))
except socket.error,e:
print 'connect false %s'%e
sock.close()
print 'connect ...'
#發送網路首頁面請求並且保持連接
try :
print 'send start...'
str='GET / HTTP/1.1\r\nHost:www..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): '''''如何判斷數據接收完畢，在發送http 最前端,
包含發送數據文件大小屬性Content-Length，
用字元匹配方式取得文件大小,
同過大小判斷是否接收完畢。
'''
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..com
Connection: Keep-Alive
'''
print str
sock.send(str)
data = ''
data = sock.recv(1024)
sock.close()
print data