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[youtubedl] / youtube_dl / extractor / justintv.py
1 import json
2 import os
3 import re
4 import xml.etree.ElementTree
5
6 from .common import InfoExtractor
7 from ..utils import (
8 ExtractorError,
9 formatSeconds,
10 )
11
12
13 class JustinTVIE(InfoExtractor):
14 """Information extractor for justin.tv and twitch.tv"""
15 # TODO: One broadcast may be split into multiple videos. The key
16 # 'broadcast_id' is the same for all parts, and 'broadcast_part'
17 # starts at 1 and increases. Can we treat all parts as one video?
18
19 _VALID_URL = r"""(?x)^(?:http://)?(?:www\.)?(?:twitch|justin)\.tv/
20 (?:
21 (?P<channelid>[^/]+)|
22 (?:(?:[^/]+)/b/(?P<videoid>[^/]+))|
23 (?:(?:[^/]+)/c/(?P<chapterid>[^/]+))
24 )
25 /?(?:\#.*)?$
26 """
27 _JUSTIN_PAGE_LIMIT = 100
28 IE_NAME = u'justin.tv'
29
30 def report_download_page(self, channel, offset):
31 """Report attempt to download a single page of videos."""
32 self.to_screen(u'%s: Downloading video information from %d to %d' %
33 (channel, offset, offset + self._JUSTIN_PAGE_LIMIT))
34
35 # Return count of items, list of *valid* items
36 def _parse_page(self, url, video_id):
37 info_json = self._download_webpage(url, video_id,
38 u'Downloading video info JSON',
39 u'unable to download video info JSON')
40
41 response = json.loads(info_json)
42 if type(response) != list:
43 error_text = response.get('error', 'unknown error')
44 raise ExtractorError(u'Justin.tv API: %s' % error_text)
45 info = []
46 for clip in response:
47 video_url = clip['video_file_url']
48 if video_url:
49 video_extension = os.path.splitext(video_url)[1][1:]
50 video_date = re.sub('-', '', clip['start_time'][:10])
51 video_uploader_id = clip.get('user_id', clip.get('channel_id'))
52 video_id = clip['id']
53 video_title = clip.get('title', video_id)
54 info.append({
55 'id': video_id,
56 'url': video_url,
57 'title': video_title,
58 'uploader': clip.get('channel_name', video_uploader_id),
59 'uploader_id': video_uploader_id,
60 'upload_date': video_date,
61 'ext': video_extension,
62 })
63 return (len(response), info)
64
65 def _real_extract(self, url):
66 mobj = re.match(self._VALID_URL, url)
67 if mobj is None:
68 raise ExtractorError(u'invalid URL: %s' % url)
69
70 api_base = 'http://api.justin.tv'
71 paged = False
72 if mobj.group('channelid'):
73 paged = True
74 video_id = mobj.group('channelid')
75 api = api_base + '/channel/archives/%s.json' % video_id
76 elif mobj.group('chapterid'):
77 chapter_id = mobj.group('chapterid')
78
79 webpage = self._download_webpage(url, chapter_id)
80 m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
81 if not m:
82 raise ExtractorError(u'Cannot find archive of a chapter')
83 archive_id = m.group(1)
84
85 api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
86 chapter_info_xml = self._download_webpage(api, chapter_id,
87 note=u'Downloading chapter information',
88 errnote=u'Chapter information download failed')
89 doc = xml.etree.ElementTree.fromstring(chapter_info_xml)
90 for a in doc.findall('.//archive'):
91 if archive_id == a.find('./id').text:
92 break
93 else:
94 raise ExtractorError(u'Could not find chapter in chapter information')
95
96 video_url = a.find('./video_file_url').text
97 video_ext = video_url.rpartition('.')[2] or u'flv'
98
99 chapter_api_url = u'https://api.twitch.tv/kraken/videos/c' + chapter_id
100 chapter_info_json = self._download_webpage(chapter_api_url, u'c' + chapter_id,
101 note='Downloading chapter metadata',
102 errnote='Download of chapter metadata failed')
103 chapter_info = json.loads(chapter_info_json)
104
105 bracket_start = int(doc.find('.//bracket_start').text)
106 bracket_end = int(doc.find('.//bracket_end').text)
107
108 # TODO determine start (and probably fix up file)
109 # youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
110 #video_url += u'?start=' + TODO:start_timestamp
111 # bracket_start is 13290, but we want 51670615
112 self._downloader.report_warning(u'Chapter detected, but we can just download the whole file. '
113 u'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
114
115 info = {
116 'id': u'c' + chapter_id,
117 'url': video_url,
118 'ext': video_ext,
119 'title': chapter_info['title'],
120 'thumbnail': chapter_info['preview'],
121 'description': chapter_info['description'],
122 'uploader': chapter_info['channel']['display_name'],
123 'uploader_id': chapter_info['channel']['name'],
124 }
125 return [info]
126 else:
127 video_id = mobj.group('videoid')
128 api = api_base + '/broadcast/by_archive/%s.json' % video_id
129
130 self.report_extraction(video_id)
131
132 info = []
133 offset = 0
134 limit = self._JUSTIN_PAGE_LIMIT
135 while True:
136 if paged:
137 self.report_download_page(video_id, offset)
138 page_url = api + ('?offset=%d&limit=%d' % (offset, limit))
139 page_count, page_info = self._parse_page(page_url, video_id)
140 info.extend(page_info)
141 if not paged or page_count != limit:
142 break
143 offset += limit
144 return info