]> gitweb @ CieloNegro.org - youtube-dl.git/blob - youtube_dl/downloader/dash.py
[generic] Update some _TESTS
[youtube-dl.git] / youtube_dl / downloader / dash.py
1 from __future__ import unicode_literals
2
3 import os
4 import re
5
6 from .fragment import FragmentFD
7 from ..compat import compat_urllib_error
8 from ..utils import (
9     sanitize_open,
10     encodeFilename,
11 )
12
13
14 class DashSegmentsFD(FragmentFD):
15     """
16     Download segments in a DASH manifest
17     """
18
19     FD_NAME = 'dashsegments'
20
21     def real_download(self, filename, info_dict):
22         base_url = info_dict['url']
23         segment_urls = [info_dict['segment_urls'][0]] if self.params.get('test', False) else info_dict['segment_urls']
24         initialization_url = info_dict.get('initialization_url')
25
26         ctx = {
27             'filename': filename,
28             'total_frags': len(segment_urls) + (1 if initialization_url else 0),
29         }
30
31         self._prepare_and_start_frag_download(ctx)
32
33         def combine_url(base_url, target_url):
34             if re.match(r'^https?://', target_url):
35                 return target_url
36             return '%s%s%s' % (base_url, '' if base_url.endswith('/') else '/', target_url)
37
38         segments_filenames = []
39
40         fragment_retries = self.params.get('fragment_retries', 0)
41
42         def append_url_to_file(target_url, tmp_filename, segment_name):
43             target_filename = '%s-%s' % (tmp_filename, segment_name)
44             count = 0
45             while count <= fragment_retries:
46                 try:
47                     success = ctx['dl'].download(target_filename, {'url': combine_url(base_url, target_url)})
48                     if not success:
49                         return False
50                     down, target_sanitized = sanitize_open(target_filename, 'rb')
51                     ctx['dest_stream'].write(down.read())
52                     down.close()
53                     segments_filenames.append(target_sanitized)
54                     break
55                 except (compat_urllib_error.HTTPError, ) as err:
56                     # YouTube may often return 404 HTTP error for a fragment causing the
57                     # whole download to fail. However if the same fragment is immediately
58                     # retried with the same request data this usually succeeds (1-2 attemps
59                     # is usually enough) thus allowing to download the whole file successfully.
60                     # So, we will retry all fragments that fail with 404 HTTP error for now.
61                     if err.code != 404:
62                         raise
63                     # Retry fragment
64                     count += 1
65                     if count <= fragment_retries:
66                         self.report_retry_fragment(segment_name, count, fragment_retries)
67             if count > fragment_retries:
68                 self.report_error('giving up after %s fragment retries' % fragment_retries)
69                 return False
70
71         if initialization_url:
72             append_url_to_file(initialization_url, ctx['tmpfilename'], 'Init')
73         for i, segment_url in enumerate(segment_urls):
74             append_url_to_file(segment_url, ctx['tmpfilename'], 'Seg%d' % i)
75
76         self._finish_frag_download(ctx)
77
78         for segment_file in segments_filenames:
79             os.remove(encodeFilename(segment_file))
80
81         return True