mediagoblin/process_media/__init__.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011 Free Software Foundation, Inc
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 import Image
  18 from mediagoblin.db.util import ObjectId
  19 from celery.task import task
  20
  21 from mediagoblin import mg_globals as mgg
  22
  23
  24 THUMB_SIZE = 200, 200
  25
  26
  27 def create_pub_filepath(entry, filename):
  28     return mgg.public_store.get_unique_filepath(
  29             ['media_entries',
  30              unicode(entry['_id']),
  31              filename])
  32
  33
  34 @task
  35 def process_media_initial(media_id):
  36     workbench = mgg.workbench_manager.create_workbench()
  37
  38     entry = mgg.database.MediaEntry.one(
  39         {'_id': ObjectId(media_id)})
  40
  41     queued_filepath = entry['queued_media_file']
  42     queued_filename = workbench.localized_file(
  43         mgg.queue_store, queued_filepath,
  44         'source')
  45
  46     queued_file = file(queued_filename, 'r')
  47
  48     with queued_file:
  49         thumb = Image.open(queued_file)
  50         thumb.thumbnail(THUMB_SIZE, Image.ANTIALIAS)
  51         # ensure color mode is compatible with jpg
  52         if thumb.mode != "RGB":
  53             thumb = thumb.convert("RGB")
  54
  55         thumb_filepath = create_pub_filepath(entry, 'thumbnail.jpg')
  56
  57         thumb_file = mgg.public_store.get_file(thumb_filepath, 'w')
  58         with thumb_file:
  59             thumb.save(thumb_file, "JPEG")
  60
  61     # we have to re-read because unlike PIL, not everything reads
  62     # things in string representation :)
  63     queued_file = file(queued_filename, 'rb')
  64
  65     with queued_file:
  66         main_filepath = create_pub_filepath(entry, queued_filepath[-1])
  67
  68         with mgg.public_store.get_file(main_filepath, 'wb') as main_file:
  69             main_file.write(queued_file.read())
  70
  71     mgg.queue_store.delete_file(queued_filepath)
  72     entry['queued_media_file'] = []
  73     media_files_dict = entry.setdefault('media_files', {})
  74     media_files_dict['thumb'] = thumb_filepath
  75     media_files_dict['main'] = main_filepath
  76     entry['state'] = u'processed'
  77     entry.save()
  78
  79     # clean up workbench
  80     workbench.destroy_self()