New IE: YouTube channels (closes #396)

diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index 1575a3434d3258d0ff743c1275b4edf96f2bfab2..88973cce8982b70a57039a26208a9c647474160f 100644 (file)
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -1578,6 +1578,56 @@ class YoutubePlaylistIE(InfoExtractor):
                return
 
 
+class YoutubeChannelIE(InfoExtractor):
+       """Information Extractor for YouTube channels."""
+
+       _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)(?:/.*)?$"
+       _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
+       _MORE_PAGES_INDICATOR = r'yt-uix-button-content">Next' # TODO
+       IE_NAME = u'youtube:channel'
+
+       def report_download_page(self, channel_id, pagenum):
+               """Report attempt to download channel page with given number."""
+               self._downloader.to_screen(u'[youtube] Channel %s: Downloading page #%s' % (channel_id, pagenum))
+
+       def _real_extract(self, url):
+               # Extract channel id
+               mobj = re.match(self._VALID_URL, url)
+               if mobj is None:
+                       self._downloader.trouble(u'ERROR: invalid url: %s' % url)
+                       return
+
+               # Download channel pages
+               channel_id = mobj.group(1)
+               video_ids = []
+               pagenum = 1
+
+               while True:
+                       self.report_download_page(channel_id, pagenum)
+                       url = self._TEMPLATE_URL % (channel_id, pagenum)
+                       request = urllib2.Request(url)
+                       try:
+                               page = urllib2.urlopen(request).read()
+                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
+                               return
+
+                       # Extract video identifiers
+                       ids_in_page = []
+                       for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&', page):
+                               if mobj.group(1) not in ids_in_page:
+                                       ids_in_page.append(mobj.group(1))
+                       video_ids.extend(ids_in_page)
+
+                       if re.search(self._MORE_PAGES_INDICATOR, page) is None:
+                               break
+                       pagenum = pagenum + 1
+
+               for id in video_ids:
+                       self._downloader.download(['http://www.youtube.com/watch?v=%s' % id])
+               return
+
+
 class YoutubeUserIE(InfoExtractor):
        """Information Extractor for YouTube users."""
 

diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index d4774e148b9f2b1cfa15632c42f48f324e8c67b3..a52d69a306fa7b75f2e4ce9f0d2224443a7c8570 100644 (file)
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -328,6 +328,7 @@ def gen_extractors():
        """
        return [
                YoutubePlaylistIE(),
+               YoutubeChannelIE(),
                YoutubeUserIE(),
                YoutubeSearchIE(),
                YoutubeIE(),