Leeching Picassa Albums

Here's a tiny python script for downloading Picassa photo albums!

It requires two parameters: the album's RSS URL (there's
a link to this at the bottom of each album page) and the pathname
of the directory where the downloaded photos will be stored.

Enjoy :-)

#!/usr/bin/env python

import urllib
import feedparser
import sys
import os

if len(sys.argv) != 3 :
   print >> sys.stderr, (("usage: %s " + 
      "<picassa-album-rss> <local-dir>") % sys.argv[0])
   sys.exit(1)

album_rss = sys.argv[1]
local_dir = sys.argv[2]

if not os.access(local_dir, os.W_OK | os.X_OK):
   print >> sys.stderr , ("error: dir %s is not writable" %
                          local_dir)
   sys.exit(1)

abs_dir = os.path.realpath(local_dir)

feed = feedparser.parse(album_rss)

total_items = len(feed.entries)
if total_items == 0:
   print >> sys.stderr , ("error parsing url %s" % album_rss)
   sys.exit(1)

for i in range(total_items):
   # of course this breaks once Picassa change their rss format..
   website = feed.entries[i]["enclosures"][0]["href"]
   slash_pos = website.rindex("/")
   pic_name = website[slash_pos+1:]
   urllib.urlretrieve(website, "%s%s%s" % (abs_dir, os.path.sep,
                                           pic_name))
   print "downloaded: %s (%i/%i)" % (pic_name, i+1, total_items)