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 import urllib,urllib2
  24
  25 from werkzeug.utils import secure_filename
  26
  27 from mediagoblin.db.util import ObjectId
  28 from mediagoblin.tools.text import cleaned_markdown_conversion, convert_to_tag_list_of_dicts
  29 from mediagoblin.tools.translate import pass_to_ugettext as _
  30 from mediagoblin.tools.response import render_to_response, redirect
  31 from mediagoblin.decorators import require_active_login
  32 from mediagoblin.submit import forms as submit_forms, security
  33 from mediagoblin.processing import mark_entry_failed, ProcessMedia
  34 from mediagoblin.messages import add_message, SUCCESS
  35 from mediagoblin.media_types import get_media_type_and_manager, \
  36     InvalidFileType, FileTypeNotSupported
  37
  38
  39 @require_active_login
  40 def submit_start(request):
  41     """
  42     First view for submitting a file.
  43     """
  44     submit_form = submit_forms.SubmitStartForm(request.POST)
  45
  46     if request.method == 'POST' and submit_form.validate():
  47         if not ('file' in request.POST
  48                 and isinstance(request.POST['file'], FieldStorage)
  49                 and request.POST['file'].file):
  50             submit_form.file.errors.append(
  51                 _(u'You must provide a file.'))
  52         else:
  53             try:
  54                 filename = request.POST['file'].filename
  55                 media_type, media_manager = get_media_type_and_manager(filename)
  56
  57                 # create entry and save in database
  58                 entry = request.db.MediaEntry()
  59                 entry['_id'] = ObjectId()
  60                 entry.media_type = unicode(media_type)
  61                 entry.title = (
  62                     unicode(request.POST['title'])
  63                     or unicode(splitext(filename)[0]))
  64
  65                 entry.description = unicode(request.POST.get('description'))
  66                 entry.description_html = cleaned_markdown_conversion(
  67                     entry.description)
  68
  69                 entry.uploader = request.user._id
  70
  71                 # Process the user's folksonomy "tags"
  72                 entry['tags'] = convert_to_tag_list_of_dicts(
  73                     request.POST.get('tags'))
  74
  75                 # Generate a slug from the title
  76                 entry.generate_slug()
  77
  78
  79                 # Now store generate the queueing related filename
  80                 queue_filepath = request.app.queue_store.get_unique_filepath(
  81                     ['media_entries',
  82                      unicode(entry._id),
  83                      secure_filename(filename)])
  84
  85                 # queue appropriately
  86                 queue_file = request.app.queue_store.get_file(
  87                     queue_filepath, 'wb')
  88
  89                 with queue_file:
  90                     queue_file.write(request.POST['file'].file.read())
  91
  92                 # Add queued filename to the entry
  93                 entry.queued_media_file = queue_filepath
  94
  95                 # We generate this ourselves so we know what the taks id is for
  96                 # retrieval later.
  97
  98                 # (If we got it off the task's auto-generation, there'd be
  99                 # a risk of a race condition when we'd save after sending
 100                 # off the task)
 101                 task_id = unicode(uuid.uuid4())
 102                 entry['queued_task_id'] = task_id
 103
 104                 # Save now so we have this data before kicking off processing
 105                 entry.save(validate=True)
 106
 107                 # Pass off to processing
 108                 #
 109                 # (... don't change entry after this point to avoid race
 110                 # conditions with changes to the document via processing code)
 111                 process_media = registry.tasks[ProcessMedia.name]
 112                 try:
 113                     process_media.apply_async(
 114                         [unicode(entry._id)], {},
 115                         task_id=task_id)
 116                 except BaseException as exc:
 117                     # The purpose of this section is because when running in "lazy"
 118                     # or always-eager-with-exceptions-propagated celery mode that
 119                     # the failure handling won't happen on Celery end.  Since we
 120                     # expect a lot of users to run things in this way we have to
 121                     # capture stuff here.
 122                     #
 123                     # ... not completely the diaper pattern because the
 124                     # exception is re-raised :)
 125                     mark_entry_failed(entry._id, exc)
 126                     # re-raise the exception
 127                     raise
 128
 129                 if mg_globals.app_config["push_urls"]:
 130                     feed_url=request.urlgen(
 131                                        'mediagoblin.user_pages.atom_feed',
 132                                        qualified=True,user=request.user.username)
 133                     hubparameters = {
 134                             'hub.mode': 'publish',
 135                             'hub.url': feed_url}
 136                     hubdata = urllib.urlencode(hubparameters)
 137                     hubheaders = {
 138                         "Content-type": "application/x-www-form-urlencoded",
 139                         "Connection": "close"}
 140                     for huburl in mg_globals.app_config["push_urls"]:
 141                         hubrequest = urllib2.Request(huburl, hubdata,hubheaders)
 142                         hubresponse = urllib2.urlopen(hubrequest)
 143
 144                 add_message(request, SUCCESS, _('Woohoo! Submitted!'))
 145
 146                 return redirect(request, "mediagoblin.user_pages.user_home",
 147                                 user=request.user.username)
 148             except Exception as e:
 149                 '''
 150                 This section is intended to catch exceptions raised in
 151                 mediagobling.media_types
 152                 '''
 153
 154                 if isinstance(e, InvalidFileType) or \
 155                         isinstance(e, FileTypeNotSupported):
 156                     submit_form.file.errors.append(
 157                         e)
 158                 else:
 159                     raise
 160
 161     return render_to_response(
 162         request,
 163         'mediagoblin/submit/start.html',
 164         {'submit_form': submit_form,
 165          'app_config': mg_globals.app_config})