Python 下载网页的几种方法

总结下，Python 下载网页的几种方法
1
 fd = urllib2.urlopen(url_link)
 data = fd.read()
 这是最简洁的一种，当然也是Get的方法
2
通过GET的方法
def GetHtmlSource(url):
    try:
   
        htmSource = ''
       
        req = urllib2.Request(url)
      
        fd = urllib2.urlopen(req,"")
       
        while 1:
            data = fd.read(1024)
            if not len(data):
                break
           
            htmSource += data
        fd.close()
 
        del fd
        del req
       
        htmSource = htmSource.decode('cp936')
        htmSource = formatStr(htmSource)
        
        return htmSource
       
    except socket.error, err:
       
        str_err =  "%s" % err
        return ""
3
 通过GET的方法
def GetHtmlSource_Get(htmurl):
    htmSource = ""
   
    try: