Merge pull request #1413 from tewe/master

Add Ustream channel support

youtube_dl/extractor/ustream.py

@@ -1,6 +1,11 @@
+import json
 import re
 
 from .common import InfoExtractor
+from ..utils import (
+    compat_urlparse,
+    compat_html_parser,
+)
 
 
 class UstreamIE(InfoExtractor):
@@ -43,3 +48,64 @@ class UstreamIE(InfoExtractor):
                 'thumbnail': thumbnail,
                }
         return info
+
+# More robust than regular expressions
+
+class ChannelParser(compat_html_parser.HTMLParser):
+    """
+    <meta name="ustream:channel_id" content="1234">
+    """
+    channel_id = None
+
+    def handle_starttag(self, tag, attrs):
+        if tag != 'meta':
+            return
+        values = dict(attrs)
+        if values.get('name') != 'ustream:channel_id':
+            return
+        value = values.get('content', '')
+        if value.isdigit():
+            self.channel_id = value
+
+class SocialstreamParser(compat_html_parser.HTMLParser):
+    """
+    <li class="content123 video" data-content-id="123" data-length="1452"
+        data-href="/recorded/123" data-og-url="/recorded/123">
+    """
+    def __init__(self):
+        compat_html_parser.HTMLParser.__init__(self)
+        self.content_ids = []
+
+    def handle_starttag(self, tag, attrs):
+        if tag != 'li':
+            return
+        for (attr, value) in attrs:
+            if attr == 'data-content-id' and value.isdigit():
+                self.content_ids.append(value)
+
+class UstreamChannelIE(InfoExtractor):
+    _VALID_URL = r'https?://www\.ustream\.tv/channel/(?P<slug>.+)'
+    IE_NAME = u'ustream:channel'
+
+    def _real_extract(self, url):
+        m = re.match(self._VALID_URL, url)
+        slug = m.group('slug')
+
+        p = ChannelParser()
+        p.feed(self._download_webpage(url, slug))
+        p.close()
+        channel_id = p.channel_id
+
+        p = SocialstreamParser()
+        BASE = 'http://www.ustream.tv'
+        next_url = '/ajax/socialstream/videos/%s/1.json' % channel_id
+        while next_url:
+            reply = json.loads(self._download_webpage(compat_urlparse.urljoin(BASE, next_url), channel_id))
+            p.feed(reply['data'])
+            next_url = reply['nextUrl']
+        p.close()
+        video_ids = p.content_ids
+
+        urls = ['http://www.ustream.tv/recorded/' + vid for vid in video_ids]
+        url_entries = [self.url_result(eurl, 'Ustream') for eurl in urls]
+        return self.playlist_result(url_entries, channel_id)