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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