id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc	parents
5497	0.9.0 pdf fails: No plugins using two-step checking found	Jorge		"Looks like the pdf plugin can't handle PDF files.

1. Setup production environment: 
2. Enable PDF support: https://mediagoblin.readthedocs.io/en/latest/siteadmin/media-types.html#pdf-and-document
sudo apt-get install -y poppler-utils
echo ""[[mediagoblin.media_types.pdf]]"" >>  mediagoblin_local.ini
git submodule init && git submodule update
./bin/gmg dbupdate
sudo service mediagoblin-paster restart
3. try to upload  attached sample PDF

{{{
2017-02-10 00:49:20,798 INFO    [mediagoblin.init.plugins] Importing plugin module: mediagoblin.media_types.pdf
2017-02-10 01:20:43,799 INFO    [mediagoblin.media_types] No plugins handled extension .pdf
2017-02-10 01:20:43,800 INFO    [mediagoblin.media_types] No plugins using two-step checking found
}}}

From mediagoblin/media_types/__init__.py

{{{
def sniff_media(media_file, filename):
    '''
    Iterate through the enabled media types and find those suited
    for a certain file.
    '''
    # copy the contents to a .name-enabled temporary file for further checks
    # TODO: there are cases when copying is not required
    tmp_media_file = tempfile.NamedTemporaryFile()
    shutil.copyfileobj(media_file, tmp_media_file)
    media_file.seek(0)
    tmp_media_file.seek(0)
    try:
        return type_match_handler(tmp_media_file, filename)
    except TypeNotFound as e:
        _log.info('No plugins using two-step checking found')
}}}

Log messages look similar to #5348."	defect	closed	major		programming	duplicate