[justin.tv] move into own file

1 files changed, 144 insertions, 0 deletions

diff --git a/youtube_dl/extractor/justintv.py b/youtube_dl/extractor/justintv.py
new file mode 100644
index 000000000..9c46baed5
--- /dev/null
+++ b/youtube_dl/extractor/justintv.py
@@ -0,0 +1,144 @@
+import json
+import os
+import re
+import xml.etree.ElementTree
+
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    formatSeconds,
+)
+
+
+class JustinTVIE(InfoExtractor):
+    """Information extractor for justin.tv and twitch.tv"""
+    # TODO: One broadcast may be split into multiple videos. The key
+    # 'broadcast_id' is the same for all parts, and 'broadcast_part'
+    # starts at 1 and increases. Can we treat all parts as one video?
+
+    _VALID_URL = r"""(?x)^(?:http://)?(?:www\.)?(?:twitch|justin)\.tv/
+        (?:
+            (?P<channelid>[^/]+)|
+            (?:(?:[^/]+)/b/(?P<videoid>[^/]+))|
+            (?:(?:[^/]+)/c/(?P<chapterid>[^/]+))
+        )
+        /?(?:\#.*)?$
+        """
+    _JUSTIN_PAGE_LIMIT = 100
+    IE_NAME = u'justin.tv'
+
+    def report_download_page(self, channel, offset):
+        """Report attempt to download a single page of videos."""
+        self.to_screen(u'%s: Downloading video information from %d to %d' %
+                (channel, offset, offset + self._JUSTIN_PAGE_LIMIT))
+
+    # Return count of items, list of *valid* items
+    def _parse_page(self, url, video_id):
+        webpage = self._download_webpage(url, video_id,
+                                         u'Downloading video info JSON',
+                                         u'unable to download video info JSON')
+
+        response = json.loads(webpage)
+        if type(response) != list:
+            error_text = response.get('error', 'unknown error')
+            raise ExtractorError(u'Justin.tv API: %s' % error_text)
+        info = []
+        for clip in response:
+            video_url = clip['video_file_url']
+            if video_url:
+                video_extension = os.path.splitext(video_url)[1][1:]
+                video_date = re.sub('-', '', clip['start_time'][:10])
+                video_uploader_id = clip.get('user_id', clip.get('channel_id'))
+                video_id = clip['id']
+                video_title = clip.get('title', video_id)
+                info.append({
+                    'id': video_id,
+                    'url': video_url,
+                    'title': video_title,
+                    'uploader': clip.get('channel_name', video_uploader_id),
+                    'uploader_id': video_uploader_id,
+                    'upload_date': video_date,
+                    'ext': video_extension,
+                })
+        return (len(response), info)
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        if mobj is None:
+            raise ExtractorError(u'invalid URL: %s' % url)
+
+        api_base = 'http://api.justin.tv'
+        paged = False
+        if mobj.group('channelid'):
+            paged = True
+            video_id = mobj.group('channelid')
+            api = api_base + '/channel/archives/%s.json' % video_id
+        elif mobj.group('chapterid'):
+            chapter_id = mobj.group('chapterid')
+
+            webpage = self._download_webpage(url, chapter_id)
+            m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
+            if not m:
+                raise ExtractorError(u'Cannot find archive of a chapter')
+            archive_id = m.group(1)
+
+            api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
+            chapter_info_xml = self._download_webpage(api, chapter_id,
+                                             note=u'Downloading chapter information',
+                                             errnote=u'Chapter information download failed')
+            doc = xml.etree.ElementTree.fromstring(chapter_info_xml)
+            for a in doc.findall('.//archive'):
+                if archive_id == a.find('./id').text:
+                    break
+            else:
+                raise ExtractorError(u'Could not find chapter in chapter information')
+
+            video_url = a.find('./video_file_url').text
+            video_ext = video_url.rpartition('.')[2] or u'flv'
+
+            chapter_api_url = u'https://api.twitch.tv/kraken/videos/c' + chapter_id
+            chapter_info_json = self._download_webpage(chapter_api_url, u'c' + chapter_id,
+                                   note='Downloading chapter metadata',
+                                   errnote='Download of chapter metadata failed')
+            chapter_info = json.loads(chapter_info_json)
+
+            bracket_start = int(doc.find('.//bracket_start').text)
+            bracket_end = int(doc.find('.//bracket_end').text)
+
+            # TODO determine start (and probably fix up file)
+            #  youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
+            #video_url += u'?start=' + TODO:start_timestamp
+            # bracket_start is 13290, but we want 51670615
+            self._downloader.report_warning(u'Chapter detected, but we can just download the whole file. '
+                                            u'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
+
+            info = {
+                'id': u'c' + chapter_id,
+                'url': video_url,
+                'ext': video_ext,
+                'title': chapter_info['title'],
+                'thumbnail': chapter_info['preview'],
+                'description': chapter_info['description'],
+                'uploader': chapter_info['channel']['display_name'],
+                'uploader_id': chapter_info['channel']['name'],
+            }
+            return [info]
+        else:
+            video_id = mobj.group('videoid')
+            api = api_base + '/broadcast/by_archive/%s.json' % video_id
+
+        self.report_extraction(video_id)
+
+        info = []
+        offset = 0
+        limit = self._JUSTIN_PAGE_LIMIT
+        while True:
+            if paged:
+                self.report_download_page(video_id, offset)
+            page_url = api + ('?offset=%d&limit=%d' % (offset, limit))
+            page_count, page_info = self._parse_page(page_url, video_id)
+            info.extend(page_info)
+            if not paged or page_count != limit:
+                break
+            offset += limit
+        return info