def media_file_from_url(url):
"""Create and return a MediaFile object representing a given URL.
Also returns the URL to a suitable thumbnail image (or None) and the
duration of the media file in seconds (or None).
Does not add the created MediaFile to the database.
"""
thumb_url = None
duration = None
title = None
media_file = MediaFile()
# Parse the URL checking for known embeddables like YouTube
embed = parse_embed_url(url)
if embed:
media_file.type = embed['type']
media_file.container = embed['container']
media_file.embed = embed['id']
title = embed['title']
if title:
media_file.display_name = title
else:
media_file.display_name = '%s ID: %s' % \
(embed['container'].capitalize(), media_file.embed)
thumb_url = embed['thumb_url']
duration = embed['duration']
else:
# Check for types we can play ourselves
name, ext, container = base_ext_container_from_uri(url)
media_file.type = guess_media_type(ext)
media_file.container = container
media_file.url = url
media_file.display_name = os.path.basename(url)
return media_file, thumb_url, duration, title
def _to_python(self, value, state):
if value == '':
return value
embed = parse_embed_url(value)
if embed:
return value
ext = os.path.splitext(value)[1].lower()[1:]
container = guess_container_format(ext)
if container in accepted_extensions():
return value
raise formencode.Invalid(
_("This isn't a valid YouTube, Google Video, Vimeo or direct link."),
value, state
)
