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[youtubedl] / youtube_dl / extractor / bandcamp.py
1 import json
2 import re
3
4 from .common import InfoExtractor
5 from ..utils import (
6 ExtractorError,
7 )
8
9
10 class BandcampIE(InfoExtractor):
11 _VALID_URL = r'http://.*?\.bandcamp\.com/track/(?P<title>.*)'
12 _TEST = {
13 u'url': u'http://youtube-dl.bandcamp.com/track/youtube-dl-test-song',
14 u'file': u'1812978515.mp3',
15 u'md5': u'cdeb30cdae1921719a3cbcab696ef53c',
16 u'info_dict': {
17 u"title": u"youtube-dl test song \"'/\\\u00e4\u21ad"
18 },
19 u'skip': u'There is a limit of 200 free downloads / month for the test song'
20 }
21
22 def _real_extract(self, url):
23 mobj = re.match(self._VALID_URL, url)
24 title = mobj.group('title')
25 webpage = self._download_webpage(url, title)
26 # We get the link to the free download page
27 m_download = re.search(r'freeDownloadPage: "(.*?)"', webpage)
28 if m_download is None:
29 raise ExtractorError(u'No free songs found')
30
31 download_link = m_download.group(1)
32 id = re.search(r'var TralbumData = {(.*?)id: (?P<id>\d*?)$',
33 webpage, re.MULTILINE|re.DOTALL).group('id')
34
35 download_webpage = self._download_webpage(download_link, id,
36 'Downloading free downloads page')
37 # We get the dictionary of the track from some javascrip code
38 info = re.search(r'items: (.*?),$',
39 download_webpage, re.MULTILINE).group(1)
40 info = json.loads(info)[0]
41 # We pick mp3-320 for now, until format selection can be easily implemented.
42 mp3_info = info[u'downloads'][u'mp3-320']
43 # If we try to use this url it says the link has expired
44 initial_url = mp3_info[u'url']
45 re_url = r'(?P<server>http://(.*?)\.bandcamp\.com)/download/track\?enc=mp3-320&fsig=(?P<fsig>.*?)&id=(?P<id>.*?)&ts=(?P<ts>.*)$'
46 m_url = re.match(re_url, initial_url)
47 #We build the url we will use to get the final track url
48 # This url is build in Bandcamp in the script download_bunde_*.js
49 request_url = '%s/statdownload/track?enc=mp3-320&fsig=%s&id=%s&ts=%s&.rand=665028774616&.vrs=1' % (m_url.group('server'), m_url.group('fsig'), id, m_url.group('ts'))
50 final_url_webpage = self._download_webpage(request_url, id, 'Requesting download url')
51 # If we could correctly generate the .rand field the url would be
52 #in the "download_url" key
53 final_url = re.search(r'"retry_url":"(.*?)"', final_url_webpage).group(1)
54
55 track_info = {'id':id,
56 'title' : info[u'title'],
57 'ext' : 'mp3',
58 'url' : final_url,
59 'thumbnail' : info[u'thumb_url'],
60 'uploader' : info[u'artist']
61 }
62
63 return [track_info]