Get size of a file before downloading in Python

Question

I\'m downloading an entire directory from a web server. It works OK, but I can\'t figure how to get the file size before download to compare if it was updated on the server

Answer 1

The size of the file is sent as the Content-Length header. Here is how to get it with urllib:

>>> site = urllib.urlopen("http://python.org")
>>> meta = site.info()
>>> print meta.getheaders("Content-Length")
['16535']
>>>