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 globals as mg_globals
  22
  23
  24 THUMB_SIZE = 200, 200
  25
  26
  27 @task
  28 def process_media_initial(media_id):
  29     workbench = mg_globals.workbench_manager.create_workbench()
  30
  31     entry = mg_globals.database.MediaEntry.one(
  32         {'_id': ObjectId(media_id)})
  33
  34     queued_filepath = entry['queued_media_file']
  35     queued_filename = mg_globals.workbench_manager.localized_file(
  36         workbench, mg_globals.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
  45         thumb_filepath = mg_globals.public_store.get_unique_filepath(
  46             ['media_entries',
  47              unicode(entry['_id']),
  48              'thumbnail.jpg'])
  49
  50         thumb_file = mg_globals.public_store.get_file(thumb_filepath, 'w')
  51         with thumb_file:
  52             thumb.save(thumb_file, "JPEG")
  53
  54     # we have to re-read because unlike PIL, not everything reads
  55     # things in string representation :)
  56     queued_file = file(queued_filename, 'rb')
  57
  58     with queued_file:
  59         main_filepath = mg_globals.public_store.get_unique_filepath(
  60             ['media_entries',
  61              unicode(entry['_id']),
  62              queued_filepath[-1]])
  63
  64         with mg_globals.public_store.get_file(main_filepath, 'wb') as main_file:
  65             main_file.write(queued_file.read())
  66
  67     mg_globals.queue_store.delete_file(queued_filepath)
  68     media_files_dict = entry.setdefault('media_files', {})
  69     media_files_dict['thumb'] = thumb_filepath
  70     media_files_dict['main'] = main_filepath
  71     entry['state'] = u'processed'
  72     entry.save()
  73
  74     # clean up workbench
  75     mg_globals.workbench_manager.destroy_workbench(workbench)