mediagoblin/submit/views.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011 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 import mediagoblin.mg_globals as mg_globals
  18 import uuid
  19 from os.path import splitext
  20 from cgi import FieldStorage
  21
  22 from celery import registry
  23
  24 from werkzeug.utils import secure_filename
  25
  26 from mediagoblin.db.util import ObjectId
  27 from mediagoblin.tools.text import cleaned_markdown_conversion, convert_to_tag_list_of_dicts
  28 from mediagoblin.tools.translate import pass_to_ugettext as _
  29 from mediagoblin.tools.response import render_to_response, redirect
  30 from mediagoblin.decorators import require_active_login
  31 from mediagoblin.submit import forms as submit_forms, security
  32 from mediagoblin.processing import mark_entry_failed, ProcessMedia
  33 from mediagoblin.messages import add_message, SUCCESS
  34 from mediagoblin.media_types import get_media_type_and_manager, InvalidFileType
  35
  36
  37 @require_active_login
  38 def submit_start(request):
  39     """
  40     First view for submitting a file.
  41     """
  42     submit_form = submit_forms.SubmitStartForm(request.POST)
  43
  44     if request.method == 'POST' and submit_form.validate():
  45         if not ('file' in request.POST
  46                 and isinstance(request.POST['file'], FieldStorage)
  47                 and request.POST['file'].file):
  48             submit_form.file.errors.append(
  49                 _(u'You must provide a file.'))
  50         else:
  51             try:
  52                 filename = request.POST['file'].filename
  53                 media_type, media_manager = get_media_type_and_manager(filename)
  54
  55                 # create entry and save in database
  56                 entry = request.db.MediaEntry()
  57                 entry['_id'] = ObjectId()
  58                 entry.media_type = unicode(media_type)
  59                 entry.title = (
  60                     unicode(request.POST['title'])
  61                     or unicode(splitext(filename)[0]))
  62
  63                 entry.description = unicode(request.POST.get('description'))
  64                 entry.description_html = cleaned_markdown_conversion(
  65                     entry.description)
  66
  67                 entry.uploader = request.user._id
  68
  69                 # Process the user's folksonomy "tags"
  70                 entry['tags'] = convert_to_tag_list_of_dicts(
  71                     request.POST.get('tags'))
  72
  73                 # Generate a slug from the title
  74                 entry.generate_slug()
  75
  76
  77                 # Now store generate the queueing related filename
  78                 queue_filepath = request.app.queue_store.get_unique_filepath(
  79                     ['media_entries',
  80                      unicode(entry._id),
  81                      secure_filename(filename)])
  82
  83                 # queue appropriately
  84                 queue_file = request.app.queue_store.get_file(
  85                     queue_filepath, 'wb')
  86
  87                 with queue_file:
  88                     queue_file.write(request.POST['file'].file.read())
  89
  90                 # Add queued filename to the entry
  91                 entry['queued_media_file'] = queue_filepath
  92
  93                 # We generate this ourselves so we know what the taks id is for
  94                 # retrieval later.
  95
  96                 # (If we got it off the task's auto-generation, there'd be
  97                 # a risk of a race condition when we'd save after sending
  98                 # off the task)
  99                 task_id = unicode(uuid.uuid4())
 100                 entry['queued_task_id'] = task_id
 101
 102                 # Save now so we have this data before kicking off processing
 103                 entry.save(validate=True)
 104
 105                 # Pass off to processing
 106                 #
 107                 # (... don't change entry after this point to avoid race
 108                 # conditions with changes to the document via processing code)
 109                 process_media = registry.tasks[ProcessMedia.name]
 110                 try:
 111                     process_media.apply_async(
 112                         [unicode(entry._id)], {},
 113                         task_id=task_id)
 114                 except BaseException as exc:
 115                     # The purpose of this section is because when running in "lazy"
 116                     # or always-eager-with-exceptions-propagated celery mode that
 117                     # the failure handling won't happen on Celery end.  Since we
 118                     # expect a lot of users to run things in this way we have to
 119                     # capture stuff here.
 120                     #
 121                     # ... not completely the diaper pattern because the
 122                     # exception is re-raised :)
 123                     mark_entry_failed(entry._id, exc)
 124                     # re-raise the exception
 125                     raise
 126
 127                 add_message(request, SUCCESS, _('Woohoo! Submitted!'))
 128
 129                 return redirect(request, "mediagoblin.user_pages.user_home",
 130                                 user=request.user.username)
 131             except InvalidFileType, exc:
 132                 submit_form.file.errors.append(
 133                     _(u'Invalid file type.'))
 134
 135     return render_to_response(
 136         request,
 137         'mediagoblin/submit/start.html',
 138         {'submit_form': submit_form,
 139          'app_config': mg_globals.app_config})