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,threadingimport threadingimport urllibimport timeimport datetimeprint '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 secondsn'%(i,url,startTime,endTime,span)) file.write('n') print(u'n requested:%s timesn Total Spent:%s secondsn avg:%s secondsn max:%s secondsn min:%s secondsn over 1 secnod:%s timesn'%(n,sumSpan,sumSpan/n,maxSpan,minSpan,over1s)) file.write(u' requested:%s timesn Total Spent:%s secondsn avg:%s secondsn max:%s secondsn min:%s secondsn over 1 secnod:%s timesn'%(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: %sn" % (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: %sn" % (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()
