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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from mediagoblin import messages
import mediagoblin.mg_globals as mg_globals
import uuid
from os.path import splitext
from celery import registry
import urllib
import urllib2
import logging
_log = logging.getLogger(__name__)
from werkzeug.utils import secure_filename
from werkzeug.datastructures import FileStorage
from mediagoblin.db.util import ObjectId
from mediagoblin.tools.text import convert_to_tag_list_of_dicts
from mediagoblin.tools.translate import pass_to_ugettext as _
from mediagoblin.tools.response import render_to_response, redirect
from mediagoblin.decorators import require_active_login
from mediagoblin.submit import forms as submit_forms
from mediagoblin.processing import mark_entry_failed
from mediagoblin.processing.task import ProcessMedia
from mediagoblin.messages import add_message, SUCCESS
from mediagoblin.media_types import sniff_media, \
InvalidFileType, FileTypeNotSupported
@require_active_login
def submit_start(request):
"""
First view for submitting a file.
"""
submit_form = submit_forms.SubmitStartForm(request.form)
if request.method == 'POST' and submit_form.validate():
if not ('file' in request.files
and isinstance(request.files['file'], FileStorage)
and request.files['file'].stream):
submit_form.file.errors.append(
_(u'You must provide a file.'))
else:
try:
filename = request.files['file'].filename
# Sniff the submitted media to determine which
# media plugin should handle processing
media_type, media_manager = sniff_media(
request.files['file'])
# create entry and save in database
entry = request.db.MediaEntry()
entry.id = ObjectId()
entry.media_type = unicode(media_type)
entry.title = (
unicode(request.form['title'])
or unicode(splitext(filename)[0]))
entry.description = unicode(request.form.get('description'))
entry.license = unicode(request.form.get('license', "")) or None
entry.uploader = request.user._id
# Process the user's folksonomy "tags"
entry.tags = convert_to_tag_list_of_dicts(
request.form.get('tags'))
# Generate a slug from the title
entry.generate_slug()
# We generate this ourselves so we know what the taks id is for
# retrieval later.
# (If we got it off the task's auto-generation, there'd be
# a risk of a race condition when we'd save after sending
# off the task)
task_id = unicode(uuid.uuid4())
# Now store generate the queueing related filename
queue_filepath = request.app.queue_store.get_unique_filepath(
['media_entries',
task_id,
secure_filename(filename)])
# queue appropriately
queue_file = request.app.queue_store.get_file(
queue_filepath, 'wb')
with queue_file:
queue_file.write(request.files['file'].stream.read())
# Add queued filename to the entry
entry.queued_media_file = queue_filepath
entry.queued_task_id = task_id
# Save now so we have this data before kicking off processing
entry.save(validate=True)
# Pass off to processing
#
# (... don't change entry after this point to avoid race
# conditions with changes to the document via processing code)
process_media = registry.tasks[ProcessMedia.name]
try:
process_media.apply_async(
[unicode(entry._id)], {},
task_id=task_id)
except BaseException as exc:
# The purpose of this section is because when running in "lazy"
# or always-eager-with-exceptions-propagated celery mode that
# the failure handling won't happen on Celery end. Since we
# expect a lot of users to run things in this way we have to
# capture stuff here.
#
# ... not completely the diaper pattern because the
# exception is re-raised :)
mark_entry_failed(entry._id, exc)
# re-raise the exception
raise
if mg_globals.app_config["push_urls"]:
feed_url = request.urlgen(
'mediagoblin.user_pages.atom_feed',
qualified=True,
user=request.user.username)
hubparameters = {
'hub.mode': 'publish',
'hub.url': feed_url}
hubdata = urllib.urlencode(hubparameters)
hubheaders = {
"Content-type": "application/x-www-form-urlencoded",
"Connection": "close"}
for huburl in mg_globals.app_config["push_urls"]:
hubrequest = urllib2.Request(huburl, hubdata, hubheaders)
try:
hubresponse = urllib2.urlopen(hubrequest)
except urllib2.HTTPError as exc:
# This is not a big issue, the item will be fetched
# by the PuSH server next time we hit it
_log.warning(
"push url %r gave error %r", huburl, exc.code)
except urllib2.URLError as exc:
_log.warning(
"push url %r is unreachable %r", huburl, exc.reason)
add_message(request, SUCCESS, _('Woohoo! Submitted!'))
return redirect(request, "mediagoblin.user_pages.user_home",
user=request.user.username)
except Exception as e:
'''
This section is intended to catch exceptions raised in
mediagoblin.media_types
'''
if isinstance(e, InvalidFileType) or \
isinstance(e, FileTypeNotSupported):
submit_form.file.errors.append(
e)
else:
raise
return render_to_response(
request,
'mediagoblin/submit/start.html',
{'submit_form': submit_form,
'app_config': mg_globals.app_config})
@require_active_login
def add_collection(request, media=None):
"""
View to create a new collection
"""
submit_form = submit_forms.AddCollectionForm(request.form)
if request.method == 'POST' and submit_form.validate():
try:
collection = request.db.Collection()
collection.id = ObjectId()
collection.title = unicode(request.form['title'])
collection.description = unicode(request.form.get('description'))
collection.creator = request.user._id
collection.generate_slug()
# Make sure this user isn't duplicating an existing collection
existing_collection = request.db.Collection.find_one({
'creator': request.user._id,
'title':collection.title})
if existing_collection:
messages.add_message(
request, messages.ERROR, _('You already have a collection called "%s"!' % collection.title))
else:
collection.save(validate=True)
add_message(request, SUCCESS, _('Collection "%s" added!' % collection.title))
return redirect(request, "mediagoblin.user_pages.user_home",
user=request.user.username)
except Exception as e:
raise
return render_to_response(
request,
'mediagoblin/submit/collection.html',
{'submit_form': submit_form,
'app_config': mg_globals.app_config})
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