mediagoblin/submit/views.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
   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 from mediagoblin import messages
  18 import mediagoblin.mg_globals as mg_globals
  19 import uuid
  20 from os.path import splitext
  21
  22 from celery import registry
  23 import logging
  24
  25 _log = logging.getLogger(__name__)
  26
  27 from werkzeug.utils import secure_filename
  28 from werkzeug.datastructures import FileStorage
  29
  30 from mediagoblin.tools.text import convert_to_tag_list_of_dicts
  31 from mediagoblin.tools.translate import pass_to_ugettext as _
  32 from mediagoblin.tools.response import render_to_response, redirect
  33 from mediagoblin.decorators import require_active_login
  34 from mediagoblin.submit import forms as submit_forms
  35 from mediagoblin.processing import mark_entry_failed
  36 from mediagoblin.processing.task import ProcessMedia
  37 from mediagoblin.messages import add_message, SUCCESS
  38 from mediagoblin.media_types import sniff_media, \
  39     InvalidFileType, FileTypeNotSupported
  40 from mediagoblin.submit.lib import handle_push_urls
  41
  42
  43 @require_active_login
  44 def submit_start(request):
  45     """
  46     First view for submitting a file.
  47     """
  48     submit_form = submit_forms.SubmitStartForm(request.form)
  49
  50     if request.method == 'POST' and submit_form.validate():
  51         if not ('file' in request.files
  52                 and isinstance(request.files['file'], FileStorage)
  53                 and request.files['file'].stream):
  54             submit_form.file.errors.append(
  55                 _(u'You must provide a file.'))
  56         else:
  57             try:
  58                 filename = request.files['file'].filename
  59
  60                 # Sniff the submitted media to determine which
  61                 # media plugin should handle processing
  62                 media_type, media_manager = sniff_media(
  63                     request.files['file'])
  64
  65                 # create entry and save in database
  66                 entry = request.db.MediaEntry()
  67                 entry.media_type = unicode(media_type)
  68                 entry.title = (
  69                     unicode(request.form['title'])
  70                     or unicode(splitext(filename)[0]))
  71
  72                 entry.description = unicode(request.form.get('description'))
  73
  74                 entry.license = unicode(request.form.get('license', "")) or None
  75
  76                 entry.uploader = request.user.id
  77
  78                 # Process the user's folksonomy "tags"
  79                 entry.tags = convert_to_tag_list_of_dicts(
  80                     request.form.get('tags'))
  81
  82                 # Generate a slug from the title
  83                 entry.generate_slug()
  84
  85                 # We generate this ourselves so we know what the taks id is for
  86                 # retrieval later.
  87
  88                 # (If we got it off the task's auto-generation, there'd be
  89                 # a risk of a race condition when we'd save after sending
  90                 # off the task)
  91                 task_id = unicode(uuid.uuid4())
  92
  93                 # Now store generate the queueing related filename
  94                 queue_filepath = request.app.queue_store.get_unique_filepath(
  95                     ['media_entries',
  96                      task_id,
  97                      secure_filename(filename)])
  98
  99                 # queue appropriately
 100                 queue_file = request.app.queue_store.get_file(
 101                     queue_filepath, 'wb')
 102
 103                 with queue_file:
 104                     queue_file.write(request.files['file'].stream.read())
 105
 106                 # Add queued filename to the entry
 107                 entry.queued_media_file = queue_filepath
 108
 109                 entry.queued_task_id = task_id
 110
 111                 # Save now so we have this data before kicking off processing
 112                 entry.save()
 113
 114                 # Pass off to processing
 115                 #
 116                 # (... don't change entry after this point to avoid race
 117                 # conditions with changes to the document via processing code)
 118                 process_media = registry.tasks[ProcessMedia.name]
 119                 try:
 120                     process_media.apply_async(
 121                         [unicode(entry.id)], {},
 122                         task_id=task_id)
 123                 except BaseException as exc:
 124                     # The purpose of this section is because when running in "lazy"
 125                     # or always-eager-with-exceptions-propagated celery mode that
 126                     # the failure handling won't happen on Celery end.  Since we
 127                     # expect a lot of users to run things in this way we have to
 128                     # capture stuff here.
 129                     #
 130                     # ... not completely the diaper pattern because the
 131                     # exception is re-raised :)
 132                     mark_entry_failed(entry.id, exc)
 133                     # re-raise the exception
 134                     raise
 135
 136                 handle_push_urls(request)
 137
 138                 add_message(request, SUCCESS, _('Woohoo! Submitted!'))
 139
 140                 return redirect(request, "mediagoblin.user_pages.user_home",
 141                                 user=request.user.username)
 142             except Exception as e:
 143                 '''
 144                 This section is intended to catch exceptions raised in
 145                 mediagoblin.media_types
 146                 '''
 147                 if isinstance(e, InvalidFileType) or \
 148                         isinstance(e, FileTypeNotSupported):
 149                     submit_form.file.errors.append(
 150                         e)
 151                 else:
 152                     raise
 153
 154     return render_to_response(
 155         request,
 156         'mediagoblin/submit/start.html',
 157         {'submit_form': submit_form,
 158          'app_config': mg_globals.app_config})
 159
 160 @require_active_login
 161 def add_collection(request, media=None):
 162     """
 163     View to create a new collection
 164     """
 165     submit_form = submit_forms.AddCollectionForm(request.form)
 166
 167     if request.method == 'POST' and submit_form.validate():
 168         try:
 169             collection = request.db.Collection()
 170
 171             collection.title = unicode(request.form['title'])
 172             collection.description = unicode(request.form.get('description'))
 173             collection.creator = request.user.id
 174             collection.generate_slug()
 175
 176             # Make sure this user isn't duplicating an existing collection
 177             existing_collection = request.db.Collection.find_one({
 178                     'creator': request.user.id,
 179                     'title':collection.title})
 180
 181             if existing_collection:
 182                 messages.add_message(
 183                     request, messages.ERROR, _('You already have a collection called "%s"!' % collection.title))
 184             else:
 185                 collection.save()
 186
 187                 add_message(request, SUCCESS, _('Collection "%s" added!' % collection.title))
 188
 189             return redirect(request, "mediagoblin.user_pages.user_home",
 190                             user=request.user.username)
 191
 192         except Exception as e:
 193             raise
 194
 195     return render_to_response(
 196         request,
 197         'mediagoblin/submit/collection.html',
 198         {'submit_form': submit_form,
 199          'app_config': mg_globals.app_config})