Python实现HTTP协议下的文件下载方法总结

h = httplib2.Http()      
url = 'https://www.jb51.net/ip.zip'  
resp, content = h.request(url)  
      
if resp['status'] == '200':  
  with open(filename, 'wb') as f:  
    f.write(content)  

filename = urllib.unquote(url).decode('utf8').split('/')[-1]  
urllib.urlretrieve(url, filename) 

def down_file():  
  url = "https://www.jb51.net/download.abc"  
  
  file_name = url.split('/')[-1]  
  u = urllib2.urlopen(url)  
  f = open(file_name, 'wb')  
  meta = u.info()  
  file_size = int(meta.getheaders("Content-Length")[0])  
    
  file_size_dl = 0  
  block_sz = 8192  
  while True:  
    buffer = u.read(block_sz)  
    if not buffer:  
      break  
    
    file_size_dl += len(buffer)  
    f.write(buffer)  
  f.close()  

scheme, netloc, path, query, fragment = urlparse.urlsplit(url)  
filename = os.path.basename(path)  
if not filename:  
  filename = 'downloaded.file'  

#!/usr/bin/python 
# -*- coding: UTF-8 -* 
''' 
Created on 2013-04-15 
Created by RobinTang 
A demo for Resuming Transfer 
''' 
import urllib2 
 
req = urllib2.Request('http://www.python.org/') 
req.add_header('Range', 'bytes=0-20') # set the range, from 0byte to 19byte, 20bytes len 
res = urllib2.urlopen(req) 
 
data = res.read() 
 
print data 
print '---------' 
print 'len:%d'%len(data)