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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 _TEST = {
30 u'url': u'http://www.twitch.tv/thegamedevhub/b/296128360',
31 u'file': u'296128360.flv',
32 u'md5': u'ecaa8a790c22a40770901460af191c9a',
33 u'info_dict': {
34 u"upload_date": u"20110927",
35 u"uploader_id": 25114803,
36 u"uploader": u"thegamedevhub",
37 u"title": u"Beginner Series - Scripting With Python Pt.1"
38 }
39 }
40
41 def report_download_page(self, channel, offset):
42 """Report attempt to download a single page of videos."""
43 self.to_screen(u'%s: Downloading video information from %d to %d' %
44 (channel, offset, offset + self._JUSTIN_PAGE_LIMIT))
45
46 # Return count of items, list of *valid* items
47 def _parse_page(self, url, video_id):
48 info_json = self._download_webpage(url, video_id,
49 u'Downloading video info JSON',
50 u'unable to download video info JSON')
51
52 response = json.loads(info_json)
53 if type(response) != list:
54 error_text = response.get('error', 'unknown error')
55 raise ExtractorError(u'Justin.tv API: %s' % error_text)
56 info = []
57 for clip in response:
58 video_url = clip['video_file_url']
59 if video_url:
60 video_extension = os.path.splitext(video_url)[1][1:]
61 video_date = re.sub('-', '', clip['start_time'][:10])
62 video_uploader_id = clip.get('user_id', clip.get('channel_id'))
63 video_id = clip['id']
64 video_title = clip.get('title', video_id)
65 info.append({
66 'id': video_id,
67 'url': video_url,
68 'title': video_title,
69 'uploader': clip.get('channel_name', video_uploader_id),
70 'uploader_id': video_uploader_id,
71 'upload_date': video_date,
72 'ext': video_extension,
73 })
74 return (len(response), info)
75
76 def _real_extract(self, url):
77 mobj = re.match(self._VALID_URL, url)
78 if mobj is None:
79 raise ExtractorError(u'invalid URL: %s' % url)
80
81 api_base = 'http://api.justin.tv'
82 paged = False
83 if mobj.group('channelid'):
84 paged = True
85 video_id = mobj.group('channelid')
86 api = api_base + '/channel/archives/%s.json' % video_id
87 elif mobj.group('chapterid'):
88 chapter_id = mobj.group('chapterid')
89
90 webpage = self._download_webpage(url, chapter_id)
91 m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
92 if not m:
93 raise ExtractorError(u'Cannot find archive of a chapter')
94 archive_id = m.group(1)
95
96 api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
97 chapter_info_xml = self._download_webpage(api, chapter_id,
98 note=u'Downloading chapter information',
99 errnote=u'Chapter information download failed')
100 doc = xml.etree.ElementTree.fromstring(chapter_info_xml)
101 for a in doc.findall('.//archive'):
102 if archive_id == a.find('./id').text:
103 break
104 else:
105 raise ExtractorError(u'Could not find chapter in chapter information')
106
107 video_url = a.find('./video_file_url').text
108 video_ext = video_url.rpartition('.')[2] or u'flv'
109
110 chapter_api_url = u'https://api.twitch.tv/kraken/videos/c' + chapter_id
111 chapter_info_json = self._download_webpage(chapter_api_url, u'c' + chapter_id,
112 note='Downloading chapter metadata',
113 errnote='Download of chapter metadata failed')
114 chapter_info = json.loads(chapter_info_json)
115
116 bracket_start = int(doc.find('.//bracket_start').text)
117 bracket_end = int(doc.find('.//bracket_end').text)
118
119 # TODO determine start (and probably fix up file)
120 # youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
121 #video_url += u'?start=' + TODO:start_timestamp
122 # bracket_start is 13290, but we want 51670615
123 self._downloader.report_warning(u'Chapter detected, but we can just download the whole file. '
124 u'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
125
126 info = {
127 'id': u'c' + chapter_id,
128 'url': video_url,
129 'ext': video_ext,
130 'title': chapter_info['title'],
131 'thumbnail': chapter_info['preview'],
132 'description': chapter_info['description'],
133 'uploader': chapter_info['channel']['display_name'],
134 'uploader_id': chapter_info['channel']['name'],
135 }
136 return [info]
137 else:
138 video_id = mobj.group('videoid')
139 api = api_base + '/broadcast/by_archive/%s.json' % video_id
140
141 self.report_extraction(video_id)
142
143 info = []
144 offset = 0
145 limit = self._JUSTIN_PAGE_LIMIT
146 while True:
147 if paged:
148 self.report_download_page(video_id, offset)
149 page_url = api + ('?offset=%d&limit=%d' % (offset, limit))
150 page_count, page_info = self._parse_page(page_url, video_id)
151 info.extend(page_info)
152 if not paged or page_count != limit:
153 break
154 offset += limit
155 return info