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R3600/modules/bibformat/lib/elements/bfe_meta_opengraph_video.py
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bfe_meta_opengraph_video.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2013 CERN.
#
# Invenio is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""BibFormat element - return the video of a record"""
import cgi
from invenio.config import CFG_SITE_URL, CFG_SITE_SECURE_URL, CFG_CERN_SITE
from invenio.bibdocfile import BibRecDocs, get_superformat_from_format
from invenio.config import CFG_WEBSEARCH_ENABLE_OPENGRAPH
def format_element(bfo):
"""
Return the video of the record, suitable for the Open Graph protocol.
"""
if not CFG_WEBSEARCH_ENABLE_OPENGRAPH:
return ""
bibarchive = BibRecDocs(bfo.recID)
bibdocs = bibarchive.list_bibdocs()
additional_tags = ""
tags = []
videos = []
images = []
for doc in bibdocs:
found_icons = []
found_image_url = ''
for docfile in doc.list_latest_files():
if docfile.is_icon():
found_icons.append((docfile.get_size(), docfile.get_url()))
elif get_superformat_from_format(docfile.get_format()).lower() in [".mp4", '.webm', '.ogv']:
found_image_url = docfile.get_url()
found_icons.sort()
for icon_size, icon_url in found_icons:
images.append((icon_url, icon_url.replace(CFG_SITE_URL, CFG_SITE_SECURE_URL)))
if found_image_url:
videos.append((found_image_url, found_image_url.replace(CFG_SITE_URL, CFG_SITE_SECURE_URL)))
if CFG_CERN_SITE:
mp4_urls = [url.replace('http://mediaarchive.cern.ch', 'https://mediastream.cern.ch') \
for url in bfo.fields('8567_u') if url.endswith('.mp4')]
img_urls = [url.replace('http://mediaarchive.cern.ch', 'https://mediastream.cern.ch') \
for url in bfo.fields('8567_u') if url.endswith('.jpg') or url.endswith('.png')]
if mp4_urls:
mp4_url = mp4_urls[0]
if "4/3" in bfo.field("300__b"):
width = "640"
height = "480"
else:
width = "640"
height = "360"
additional_tags += '''
<meta property="og:video" content="%(CFG_CERN_PLAYER_URL)s?file=%(mp4_url_relative)s&streamer=%(CFG_STREAMER_URL)s&provider=rtmp&stretching=exactfit&image=%(image_url)s" />
<meta property="og:video:height" content="%(height)s" />
<meta property="og:video:width" content="%(width)s" />
<meta property="og:video:type" content="application/x-shockwave-flash" />
<meta property="og:video" content="%(mp4_url)s" />
<meta property="og:video:type" content="video/mp4" />
<meta property="og:image" content="%(image_url)s" />
<meta name="twitter:player:height" content="%(height)s" />
<meta name="twitter:player:width" content="%(width)s" />
<link rel="image_src" href="%(image_url)s" />
<link rel="video_src" href="%(CFG_CERN_PLAYER_URL)s?file=%(mp4_url_relative)s&streamer=%(CFG_STREAMER_URL)s&provider=rtmp&stretching=exactfit&image=%(image_url)s"/>
''' % {'CFG_CERN_PLAYER_URL': "https://cds.cern.ch/mediaplayer.swf",
'CFG_STREAMER_URL': "rtmp://wowza.cern.ch:1935/vod",
'width': width,
'height': height,
'image_url': img_urls and img_urls[0] or '',
'mp4_url': mp4_url.replace('http://mediaarchive.cern.ch', 'https://mediastream.cern.ch'),
'mp4_url_relative': '/' + '/'.join(mp4_url.split('/')[4:])}
try:
from invenio.media_utils import generate_embedding_url
embed_url = generate_embedding_url(bfo.field('037__a'))
additional_tags += '''<meta name="twitter:player" content="%s"/>''' % cgi.escape(embed_url, quote=True).replace('http://', 'https://', 1)
except:
pass
tags = ['<meta property="og:image" content="%s" />%s' % (image_url, image_url != image_secure_url and '\n<meta property="og:image:secure_url" content="%s" />' % image_secure_url or "") for image_url, image_secure_url in images]
tags.extend(['<meta property="og:video" content="%s" />%s' % (video_url, video_url != video_secure_url and '\n<meta property="og:video:secure_url" content="%s" />' % video_secure_url or "") for video_url, video_secure_url in videos])
return "\n".join(tags) + additional_tags
def escape_values(bfo):
"""
Called by BibFormat in order to check if output of this element
should be escaped.
"""
return 0
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