python3 get url file size sample code

In python3, urllib2 is replaced, so the header files add the

import  as urllib2
def getRemoteFileSize(url, proxy=None):
 """ Get remote file size via content-length header
  url - destination file URL
  proxy - proxy """
 opener = urllib2.build_opener()
 if proxy:
  if ().startswith('https://'):
   opener.add_handler(({'https' : proxy}))
  else:
   opener.add_handler(({'http' : proxy}))
 try:
  request = (url)
  request.get_method = lambda: 'HEAD'
  response = (request)
  ()
 except Exception:
  return 0
 else:
  print()
  fileSize = dict().get('content-length', 0)
  return int(fileSize)

Using the above code found that the output is 0, considering that it should not query the content-length field, print the field, found that the content-length field should be changed to Content-Length, change the normal

在这里插入图片描述

def getRemoteFileSize(url, proxy=None):
 """ Get remote file size via content-length header
  url - destination file URL
  proxy - proxy """
 opener = urllib2.build_opener()
 if proxy:
  if ().startswith('https://'):
   opener.add_handler(({'https' : proxy}))
  else:
   opener.add_handler(({'http' : proxy}))
 try:
  request = (url)
  request.get_method = lambda: 'HEAD'
  response = (request)
  ()
 except Exception:
  return 0
 else:
  print()
  fileSize = dict().get('Content-Length', 0)
  return int(fileSize)

summarize

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