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 @task
  28 def process_media_initial(media_id):
  29     workbench = mgg.workbench_manager.create_workbench()
  30
  31     entry = mgg.database.MediaEntry.one(
  32         {'_id': ObjectId(media_id)})
  33
  34     queued_filepath = entry['queued_media_file']
  35     queued_filename = workbench.localized_file(
  36         mgg.queue_store, queued_filepath,
  37         'source')
  38
  39     queued_file = file(queued_filename, 'r')
  40
  41     with queued_file:
  42         thumb = Image.open(queued_file)
  43         thumb.thumbnail(THUMB_SIZE, Image.ANTIALIAS)
  44         # ensure color mode is compatible with jpg
  45         if thumb.mode != "RGB":
  46             thumb = thumb.convert("RGB")
  47
  48         thumb_filepath = mgg.public_store.get_unique_filepath(
  49             ['media_entries',
  50              unicode(entry['_id']),
  51              'thumbnail.jpg'])
  52
  53         thumb_file = mgg.public_store.get_file(thumb_filepath, 'w')
  54         with thumb_file:
  55             thumb.save(thumb_file, "JPEG")
  56
  57     # we have to re-read because unlike PIL, not everything reads
  58     # things in string representation :)
  59     queued_file = file(queued_filename, 'rb')
  60
  61     with queued_file:
  62         main_filepath = mgg.public_store.get_unique_filepath(
  63             ['media_entries',
  64              unicode(entry['_id']),
  65              queued_filepath[-1]])
  66
  67         with mgg.public_store.get_file(main_filepath, 'wb') as main_file:
  68             main_file.write(queued_file.read())
  69
  70     mgg.queue_store.delete_file(queued_filepath)
  71     media_files_dict = entry.setdefault('media_files', {})
  72     media_files_dict['thumb'] = thumb_filepath
  73     media_files_dict['main'] = main_filepath
  74     entry['state'] = u'processed'
  75     entry.save()
  76
  77     # clean up workbench
  78     workbench.destroy_self()