#! encoding=utf-8  
  
import urllib2  
import re  
import os  
  
def Download(url,output):  
    print "downloading..."+url  
    response = urllib2.urlopen(url)  
    resourceFile = open(output,"wb")  
    resourceFile.write(response.read())  
    resourceFile.close()  
    print "downloaded"  
  
def Action(url,ext = "pdf",output = "."):  
      
    #1.domain  
    index = url.rfind("/");  
    domain = url[0:index+1];  
    print domain  
    request = urllib2.Request(url)  
    response = urllib2.urlopen(request)  
      
    #2.content  
    content = response.read()  
#    print content  
      
    #3.resource  
    mode = ‘\"([^\"]+‘+ext+‘)\"‘  
    pattern = re.compile(mode)  
    strMatch = pattern.findall(content)  
    size = len(strMatch)  
    print "file num: "+str(size)  
    for i in range(0,size,1):  
#        print strMatch[i]  
        one = strMatch[i]  
        partIndex = one.rfind(‘/‘)  
        if not one.startswith(‘http://‘):  
            if -1!=partIndex:  
                directDir = one[0:partIndex+1]  
            else:  
                directDir = ""  
#            print directDir  
            try:  
                os.makedirs(output+"/"+directDir)  
            except Exception,e:  
                pass  
            fileUrl = domain+one  
            fileOutput = output+"/"+one  
            print fileUrl  
            print fileOutput  
            Download(fileUrl,fileOutput)  
        else:  
            print one  
            print "........."  
            print one[partIndex:]  
            fileOutput = output+"/"+one[partIndex:]  
            print fileOutput  
            Download(one,fileOutput)  
    #5.download  
  
if __name__==‘__main__‘:  
    print "download"  
    url = "http://compgeom.cs.uiuc.edu/~jeffe/teaching/algorithms/";  
    Action("http://tech.qq.com/","jpg");