Python实现多并发访问网站功能示例

 # 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  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('thread<strong style="color:transparent">来源gaodai#ma#com搞@@代~&码网</strong>s_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()