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[youtubedl] / youtube_dl / extractor / grooveshark.py
1 # coding: utf-8
2 from __future__ import unicode_literals
3
4 import time
5 import math
6 import os.path
7 import re
8
9
10 from .common import InfoExtractor
11 from ..compat import (
12 compat_html_parser,
13 compat_urllib_parse,
14 compat_urllib_request,
15 compat_urlparse,
16 )
17 from ..utils import ExtractorError
18
19
20 class GroovesharkHtmlParser(compat_html_parser.HTMLParser):
21 def __init__(self):
22 self._current_object = None
23 self.objects = []
24 compat_html_parser.HTMLParser.__init__(self)
25
26 def handle_starttag(self, tag, attrs):
27 attrs = dict((k, v) for k, v in attrs)
28 if tag == 'object':
29 self._current_object = {'attrs': attrs, 'params': []}
30 elif tag == 'param':
31 self._current_object['params'].append(attrs)
32
33 def handle_endtag(self, tag):
34 if tag == 'object':
35 self.objects.append(self._current_object)
36 self._current_object = None
37
38 @classmethod
39 def extract_object_tags(cls, html):
40 p = cls()
41 p.feed(html)
42 p.close()
43 return p.objects
44
45
46 class GroovesharkIE(InfoExtractor):
47 _VALID_URL = r'https?://(www\.)?grooveshark\.com/#!/s/([^/]+)/([^/]+)'
48 _TEST = {
49 'url': 'http://grooveshark.com/#!/s/Jolene+Tenth+Key+Remix+Ft+Will+Sessions/6SS1DW?src=5',
50 'md5': '7ecf8aefa59d6b2098517e1baa530023',
51 'info_dict': {
52 'id': '6SS1DW',
53 'title': 'Jolene (Tenth Key Remix ft. Will Sessions)',
54 'ext': 'mp3',
55 'duration': 227,
56 }
57 }
58
59 do_playerpage_request = True
60 do_bootstrap_request = True
61
62 def _parse_target(self, target):
63 uri = compat_urlparse.urlparse(target)
64 hash = uri.fragment[1:].split('?')[0]
65 token = os.path.basename(hash.rstrip('/'))
66 return (uri, hash, token)
67
68 def _build_bootstrap_url(self, target):
69 (uri, hash, token) = self._parse_target(target)
70 query = 'getCommunicationToken=1&hash=%s&%d' % (compat_urllib_parse.quote(hash, safe=''), self.ts)
71 return (compat_urlparse.urlunparse((uri.scheme, uri.netloc, '/preload.php', None, query, None)), token)
72
73 def _build_meta_url(self, target):
74 (uri, hash, token) = self._parse_target(target)
75 query = 'hash=%s&%d' % (compat_urllib_parse.quote(hash, safe=''), self.ts)
76 return (compat_urlparse.urlunparse((uri.scheme, uri.netloc, '/preload.php', None, query, None)), token)
77
78 def _build_stream_url(self, meta):
79 return compat_urlparse.urlunparse(('http', meta['streamKey']['ip'], '/stream.php', None, None, None))
80
81 def _build_swf_referer(self, target, obj):
82 (uri, _, _) = self._parse_target(target)
83 return compat_urlparse.urlunparse((uri.scheme, uri.netloc, obj['attrs']['data'], None, None, None))
84
85 def _transform_bootstrap(self, js):
86 return re.split('(?m)^\s*try\s*\{', js)[0] \
87 .split(' = ', 1)[1].strip().rstrip(';')
88
89 def _transform_meta(self, js):
90 return js.split('\n')[0].split('=')[1].rstrip(';')
91
92 def _get_meta(self, target):
93 (meta_url, token) = self._build_meta_url(target)
94 self.to_screen('Metadata URL: %s' % meta_url)
95
96 headers = {'Referer': compat_urlparse.urldefrag(target)[0]}
97 req = compat_urllib_request.Request(meta_url, headers=headers)
98 res = self._download_json(req, token,
99 transform_source=self._transform_meta)
100
101 if 'getStreamKeyWithSong' not in res:
102 raise ExtractorError(
103 'Metadata not found. URL may be malformed, or Grooveshark API may have changed.')
104
105 if res['getStreamKeyWithSong'] is None:
106 raise ExtractorError(
107 'Metadata download failed, probably due to Grooveshark anti-abuse throttling. Wait at least an hour before retrying from this IP.',
108 expected=True)
109
110 return res['getStreamKeyWithSong']
111
112 def _get_bootstrap(self, target):
113 (bootstrap_url, token) = self._build_bootstrap_url(target)
114
115 headers = {'Referer': compat_urlparse.urldefrag(target)[0]}
116 req = compat_urllib_request.Request(bootstrap_url, headers=headers)
117 res = self._download_json(req, token, fatal=False,
118 note='Downloading player bootstrap data',
119 errnote='Unable to download player bootstrap data',
120 transform_source=self._transform_bootstrap)
121 return res
122
123 def _get_playerpage(self, target):
124 (_, _, token) = self._parse_target(target)
125
126 webpage = self._download_webpage(
127 target, token,
128 note='Downloading player page',
129 errnote='Unable to download player page',
130 fatal=False)
131
132 if webpage is not None:
133 # Search (for example German) error message
134 error_msg = self._html_search_regex(
135 r'<div id="content">\s*<h2>(.*?)</h2>', webpage,
136 'error message', default=None)
137 if error_msg is not None:
138 error_msg = error_msg.replace('\n', ' ')
139 raise ExtractorError('Grooveshark said: %s' % error_msg)
140
141 if webpage is not None:
142 o = GroovesharkHtmlParser.extract_object_tags(webpage)
143 return (webpage, [x for x in o if x['attrs']['id'] == 'jsPlayerEmbed'])
144
145 return (webpage, None)
146
147 def _real_initialize(self):
148 self.ts = int(time.time() * 1000) # timestamp in millis
149
150 def _real_extract(self, url):
151 (target_uri, _, token) = self._parse_target(url)
152
153 # 1. Fill cookiejar by making a request to the player page
154 swf_referer = None
155 if self.do_playerpage_request:
156 (_, player_objs) = self._get_playerpage(url)
157 if player_objs is not None:
158 swf_referer = self._build_swf_referer(url, player_objs[0])
159 self.to_screen('SWF Referer: %s' % swf_referer)
160
161 # 2. Ask preload.php for swf bootstrap data to better mimic webapp
162 if self.do_bootstrap_request:
163 bootstrap = self._get_bootstrap(url)
164 self.to_screen('CommunicationToken: %s' % bootstrap['getCommunicationToken'])
165
166 # 3. Ask preload.php for track metadata.
167 meta = self._get_meta(url)
168
169 # 4. Construct stream request for track.
170 stream_url = self._build_stream_url(meta)
171 duration = int(math.ceil(float(meta['streamKey']['uSecs']) / 1000000))
172 post_dict = {'streamKey': meta['streamKey']['streamKey']}
173 post_data = compat_urllib_parse.urlencode(post_dict).encode('utf-8')
174 headers = {
175 'Content-Length': len(post_data),
176 'Content-Type': 'application/x-www-form-urlencoded'
177 }
178 if swf_referer is not None:
179 headers['Referer'] = swf_referer
180
181 return {
182 'id': token,
183 'title': meta['song']['Name'],
184 'http_method': 'POST',
185 'url': stream_url,
186 'ext': 'mp3',
187 'format': 'mp3 audio',
188 'duration': duration,
189 'http_post_data': post_data,
190 'http_headers': headers,
191 }