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b/rdpl2stream/XspfPlaylistDecoder.py |
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##########################################################################
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# Copyright 2009 Carlos Ribeiro
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#
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# This file is part of Radio Tray
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#
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# Radio Tray is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 1 of the License, or
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# (at your option) any later version.
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#
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# Radio Tray is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Radio Tray. If not, see <http://www.gnu.org/licenses/>.
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#
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##########################################################################
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import urllib2
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from lxml import etree
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from lxml import objectify
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from StringIO import StringIO
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from lib.common import USER_AGENT
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import logging
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class XspfPlaylistDecoder:
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def __init__(self):
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self.log = logging.getLogger('radiotray')
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self.log.debug('XSPF playlist decoder')
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def isStreamValid(self, contentType, firstBytes):
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if('application/xspf+xml' in contentType):
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self.log.info('Stream is readable by XSPF Playlist Decoder')
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return True
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else:
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return False
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def extractPlaylist(self, url):
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self.log.info('Downloading playlist...')
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req = urllib2.Request(url)
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req.add_header('User-Agent', USER_AGENT)
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f = urllib2.urlopen(req)
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str = f.read()
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f.close()
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self.log.info('Playlist downloaded')
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self.log.info('Decoding playlist...')
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parser = etree.XMLParser(recover=True)
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root = etree.parse(StringIO(str),parser)
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elements = root.xpath("//xspf:track/xspf:location",namespaces={'xspf':'http://xspf.org/ns/0/'})
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result = []
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for r in elements:
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result.append(r.text)
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if (len(result) > 0):
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return result
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else:
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return None
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