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# Written by Owen Williams, (c) 2007
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# see LICENSE for license information
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# iTunes has very strange weblinks, but they are not that hard to read.
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# A "viewPodcast" link returns a gzipped web page that contains a link that
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# iTunes can load. Although the protocol of this link is itms://, we can
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# load it with http. This time we get a gzipped xml file, and toward the
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# bottom of the file is a simple key / value pair for episodeURL. This
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# url is what the podcast author has told itunes to use, and it'll be regular
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from xml.sax import saxutils, make_parser
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from xml.sax.handler import feature_namespaces
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if url.lower().startswith("itms://"):
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def is_itunes_url(url):
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""" Two simple checks to see if this is a valid itunes url:
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(ie, http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=207870198)
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* does it contain "phobos.apple.com", and
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* does it contain "viewPodcast"
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There's also another form, as in http://www.itunes.com/podcast?id=207870198"""
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if url.lower().startswith("itms://"):
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if "apple.com/" in url.lower() and "viewPodcast" in url:
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if "itunes.com/podcast" in url.lower():
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def get_rss_from_itunes(url):
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if not is_itunes_url(url):
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raise ItunesError, "not an itunes url"
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if not is_itms_url(url):
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url2 = get_itms_url(url)
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return get_podcast_url(url2)
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url2 = url.replace("itms://", "http://")
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return get_podcast_url(url2)
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def get_itms_url(url):
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# Part 1, get the itunes "webpage" for this feed
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# we have to save the file because urlopen doesn't support seeking
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filename, message = urllib.urlretrieve(url)
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#uncompressed = gzip.GzipFile(filename=filename, mode='r')
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uncompressed = open(filename, 'r')
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parser = viewPodcastParser()
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parser.feed(uncompressed.read())
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if parser.url is None:
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raise ItunesError, "error getting viewpodcast url from itunes"
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def get_podcast_url(url):
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# Part 2, find the actual rss link in the itunes "webpage"
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filename, message = urllib.urlretrieve(url)
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#uncompressed = gzip.GzipFile(filename=filename, mode='r')
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uncompressed = open(filename, 'r')
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parser = make_parser()
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parser.setFeature(feature_namespaces, 0)
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handler = itunesHandler()
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parser.setContentHandler(handler)
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parser.parse(uncompressed)
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if handler.url is None:
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raise ItunesError, "error finding podcast url"
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class viewPodcastParser(HTMLParser.HTMLParser):
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HTMLParser.HTMLParser.__init__(self)
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def handle_starttag(self, tag, attrs):
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if tag.upper() == "BODY":
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for attr, val in attrs:
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url = val[val.find("itms://") + 4:]
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url = url[:url.find("'")]
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from xml.sax.handler import ContentHandler
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def_handler = ContentHandler
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from xml.sax.saxutils import DefaultHandler
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def_handler = DefaultHandler
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logging.error("couldn't get xml parsing")
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class itunesHandler(def_handler):
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self._in_value = None
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self._last_key = None
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def startElement(self, name, attrs):
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elif name == 'string':
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def endElement(self, name):
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self._last_key = self._in_key
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elif name == 'string':
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if self._last_key == 'feedURL':
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self.url = self._in_value
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self._in_value = None
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def characters(self, ch):
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if self._in_key is not None:
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elif self._in_value is not None:
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class ItunesError(Exception):
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def __init__(self, m):
added
removed
penguintv/itunes.py
