]> Raphaƫl G. Git Repositories - youtubedl/blob - youtube_dl/extractor/justintv.py
Merge tag 'upstream/2013.12.04'
[youtubedl] / youtube_dl / extractor / justintv.py
1 import json
2 import os
3 import re
4
5 from .common import InfoExtractor
6 from ..utils import (
7 ExtractorError,
8 formatSeconds,
9 )
10
11
12 class JustinTVIE(InfoExtractor):
13 """Information extractor for justin.tv and twitch.tv"""
14 # TODO: One broadcast may be split into multiple videos. The key
15 # 'broadcast_id' is the same for all parts, and 'broadcast_part'
16 # starts at 1 and increases. Can we treat all parts as one video?
17
18 _VALID_URL = r"""(?x)^(?:http://)?(?:www\.)?(?:twitch|justin)\.tv/
19 (?:
20 (?P<channelid>[^/]+)|
21 (?:(?:[^/]+)/b/(?P<videoid>[^/]+))|
22 (?:(?:[^/]+)/c/(?P<chapterid>[^/]+))
23 )
24 /?(?:\#.*)?$
25 """
26 _JUSTIN_PAGE_LIMIT = 100
27 IE_NAME = u'justin.tv'
28 _TEST = {
29 u'url': u'http://www.twitch.tv/thegamedevhub/b/296128360',
30 u'file': u'296128360.flv',
31 u'md5': u'ecaa8a790c22a40770901460af191c9a',
32 u'info_dict': {
33 u"upload_date": u"20110927",
34 u"uploader_id": 25114803,
35 u"uploader": u"thegamedevhub",
36 u"title": u"Beginner Series - Scripting With Python Pt.1"
37 }
38 }
39
40 def report_download_page(self, channel, offset):
41 """Report attempt to download a single page of videos."""
42 self.to_screen(u'%s: Downloading video information from %d to %d' %
43 (channel, offset, offset + self._JUSTIN_PAGE_LIMIT))
44
45 # Return count of items, list of *valid* items
46 def _parse_page(self, url, video_id):
47 info_json = self._download_webpage(url, video_id,
48 u'Downloading video info JSON',
49 u'unable to download video info JSON')
50
51 response = json.loads(info_json)
52 if type(response) != list:
53 error_text = response.get('error', 'unknown error')
54 raise ExtractorError(u'Justin.tv API: %s' % error_text)
55 info = []
56 for clip in response:
57 video_url = clip['video_file_url']
58 if video_url:
59 video_extension = os.path.splitext(video_url)[1][1:]
60 video_date = re.sub('-', '', clip['start_time'][:10])
61 video_uploader_id = clip.get('user_id', clip.get('channel_id'))
62 video_id = clip['id']
63 video_title = clip.get('title', video_id)
64 info.append({
65 'id': video_id,
66 'url': video_url,
67 'title': video_title,
68 'uploader': clip.get('channel_name', video_uploader_id),
69 'uploader_id': video_uploader_id,
70 'upload_date': video_date,
71 'ext': video_extension,
72 })
73 return (len(response), info)
74
75 def _real_extract(self, url):
76 mobj = re.match(self._VALID_URL, url)
77 if mobj is None:
78 raise ExtractorError(u'invalid URL: %s' % url)
79
80 api_base = 'http://api.justin.tv'
81 paged = False
82 if mobj.group('channelid'):
83 paged = True
84 video_id = mobj.group('channelid')
85 api = api_base + '/channel/archives/%s.json' % video_id
86 elif mobj.group('chapterid'):
87 chapter_id = mobj.group('chapterid')
88
89 webpage = self._download_webpage(url, chapter_id)
90 m = re.search(r'PP\.archive_id = "([0-9]+)";', webpage)
91 if not m:
92 raise ExtractorError(u'Cannot find archive of a chapter')
93 archive_id = m.group(1)
94
95 api = api_base + '/broadcast/by_chapter/%s.xml' % chapter_id
96 doc = self._download_xml(api, chapter_id,
97 note=u'Downloading chapter information',
98 errnote=u'Chapter information download failed')
99 for a in doc.findall('.//archive'):
100 if archive_id == a.find('./id').text:
101 break
102 else:
103 raise ExtractorError(u'Could not find chapter in chapter information')
104
105 video_url = a.find('./video_file_url').text
106 video_ext = video_url.rpartition('.')[2] or u'flv'
107
108 chapter_api_url = u'https://api.twitch.tv/kraken/videos/c' + chapter_id
109 chapter_info_json = self._download_webpage(chapter_api_url, u'c' + chapter_id,
110 note='Downloading chapter metadata',
111 errnote='Download of chapter metadata failed')
112 chapter_info = json.loads(chapter_info_json)
113
114 bracket_start = int(doc.find('.//bracket_start').text)
115 bracket_end = int(doc.find('.//bracket_end').text)
116
117 # TODO determine start (and probably fix up file)
118 # youtube-dl -v http://www.twitch.tv/firmbelief/c/1757457
119 #video_url += u'?start=' + TODO:start_timestamp
120 # bracket_start is 13290, but we want 51670615
121 self._downloader.report_warning(u'Chapter detected, but we can just download the whole file. '
122 u'Chapter starts at %s and ends at %s' % (formatSeconds(bracket_start), formatSeconds(bracket_end)))
123
124 info = {
125 'id': u'c' + chapter_id,
126 'url': video_url,
127 'ext': video_ext,
128 'title': chapter_info['title'],
129 'thumbnail': chapter_info['preview'],
130 'description': chapter_info['description'],
131 'uploader': chapter_info['channel']['display_name'],
132 'uploader_id': chapter_info['channel']['name'],
133 }
134 return [info]
135 else:
136 video_id = mobj.group('videoid')
137 api = api_base + '/broadcast/by_archive/%s.json' % video_id
138
139 self.report_extraction(video_id)
140
141 info = []
142 offset = 0
143 limit = self._JUSTIN_PAGE_LIMIT
144 while True:
145 if paged:
146 self.report_download_page(video_id, offset)
147 page_url = api + ('?offset=%d&limit=%d' % (offset, limit))
148 page_count, page_info = self._parse_page(page_url, video_id)
149 info.extend(page_info)
150 if not paged or page_count != limit:
151 break
152 offset += limit
153 return info