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:
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# 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() |
希望本文所述对大家Python程序设计有所帮助。