【下载文档:  Python实现多并发访问网站功能示例.txt 】

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Python实现多并发访问网站功能示例
本文实例讲述了Python实现多并发访问网站功能。分享给大家供大家参考，具体如下：
# Filename:visitweb_threads.py
# Description:python visit web, get startTime, endTime, everytimes spentTime,threading
import threading
import urllib
import time
import datetime
print 'num web SpentTime'
def Process(url,n):
minSpan = 0.0
maxSpan = 0.0
sumSpan= 0.0
over1s = 0
file = open('data.txt','a') # save Data
for i in range(n):
startTime =datetime.datetime.now()
try:
urlItem = urllib.urlopen(url)
htmSource = urlItem.read()
urlItem.close()
except:
pass
endTime = datetime.datetime.now()
span = (endTime-startTime).total_seconds()
sumSpan = sumSpan + span
if span < minSpan:
minSpan = span
if span > maxSpan:
maxSpan = span
if span>1:
over1s=over1s + 1
print(u'%4d %s Spent:%7s seconds'%(i,url,span))
file.write(u'%4d %s ST:%s ET:%s Spent :%s seconds\n'%(i,url,startTime,endTime,span))
file.write('\n')
print(u'\n requested:%s times\n Total Spent:%s seconds\n avg:%s seconds\n max:%s seconds\n min:%s seconds\n over 1 secnod:%s times\n'%(n,sumSpan,sumSpan/n,maxSpan,minSpan,over1s))
file.write(u' requested:%s times\n Total Spent:%s seconds\n avg:%s seconds\n max:%s seconds\n min:%s seconds\n over 1 secnod:%s times\n'%(n,sumSpan,sumSpan/n,maxSpan,minSpan,over1s))
file.close()
class ThreadClass(threading.Thread):
def run(self):
now = datetime.datetime.now()
print "%s says Hello World at time: %s" % (self.getName(), now)
file = open('threads_data.txt','a') # save threads_data
file.write( "%s says Hello World at time: %s\n" % (self.getName(), now))
Process('http://222.20.6.184/main.aspx',10) # visit website 网站的Url和每个进程的访问次数
now = datetime.datetime.now()
print "%s says Goodbye at time: %s" % (self.getName(), now)
file.write( "%s says Goodbye at time: %s\n" % (self.getName(), now))
file.close()
if __name__=='__main__':
# file = open('threads_data.txt','w')
# file.close()
# file = open('data.txt','w')
# file.close()
for i in range(1000): # 多少次同时并发访问
t = ThreadClass()
t.start()
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