]> gitweb @ CieloNegro.org - youtube-dl.git/blob - youtube_dl/downloader/fragment.py
[ChangeLog] Actualize
[youtube-dl.git] / youtube_dl / downloader / fragment.py
1 from __future__ import division, unicode_literals
2
3 import os
4 import time
5
6 from .common import FileDownloader
7 from .http import HttpFD
8 from ..utils import (
9     error_to_compat_str,
10     encodeFilename,
11     sanitize_open,
12     sanitized_Request,
13 )
14
15
16 class HttpQuietDownloader(HttpFD):
17     def to_screen(self, *args, **kargs):
18         pass
19
20
21 class FragmentFD(FileDownloader):
22     """
23     A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
24
25     Available options:
26
27     fragment_retries:   Number of times to retry a fragment for HTTP error (DASH
28                         and hlsnative only)
29     skip_unavailable_fragments:
30                         Skip unavailable fragments (DASH and hlsnative only)
31     """
32
33     def report_retry_fragment(self, err, fragment_name, count, retries):
34         self.to_screen(
35             '[download] Got server HTTP error: %s. Retrying fragment %s (attempt %d of %s)...'
36             % (error_to_compat_str(err), fragment_name, count, self.format_retries(retries)))
37
38     def report_skip_fragment(self, fragment_name):
39         self.to_screen('[download] Skipping fragment %s...' % fragment_name)
40
41     def _prepare_url(self, info_dict, url):
42         headers = info_dict.get('http_headers')
43         return sanitized_Request(url, None, headers) if headers else url
44
45     def _prepare_and_start_frag_download(self, ctx):
46         self._prepare_frag_download(ctx)
47         self._start_frag_download(ctx)
48
49     def _prepare_frag_download(self, ctx):
50         if 'live' not in ctx:
51             ctx['live'] = False
52         self.to_screen(
53             '[%s] Total fragments: %s'
54             % (self.FD_NAME, ctx['total_frags'] if not ctx['live'] else 'unknown (live)'))
55         self.report_destination(ctx['filename'])
56         dl = HttpQuietDownloader(
57             self.ydl,
58             {
59                 'continuedl': True,
60                 'quiet': True,
61                 'noprogress': True,
62                 'ratelimit': self.params.get('ratelimit'),
63                 'retries': self.params.get('retries', 0),
64                 'test': self.params.get('test', False),
65             }
66         )
67         tmpfilename = self.temp_name(ctx['filename'])
68         dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
69         ctx.update({
70             'dl': dl,
71             'dest_stream': dest_stream,
72             'tmpfilename': tmpfilename,
73         })
74
75     def _start_frag_download(self, ctx):
76         total_frags = ctx['total_frags']
77         # This dict stores the download progress, it's updated by the progress
78         # hook
79         state = {
80             'status': 'downloading',
81             'downloaded_bytes': 0,
82             'frag_index': 0,
83             'frag_count': total_frags,
84             'filename': ctx['filename'],
85             'tmpfilename': ctx['tmpfilename'],
86         }
87
88         start = time.time()
89         ctx.update({
90             'started': start,
91             # Total complete fragments downloaded so far in bytes
92             'complete_frags_downloaded_bytes': 0,
93             # Amount of fragment's bytes downloaded by the time of the previous
94             # frag progress hook invocation
95             'prev_frag_downloaded_bytes': 0,
96         })
97
98         def frag_progress_hook(s):
99             if s['status'] not in ('downloading', 'finished'):
100                 return
101
102             time_now = time.time()
103             state['elapsed'] = time_now - start
104             frag_total_bytes = s.get('total_bytes') or 0
105             if not ctx['live']:
106                 estimated_size = (
107                     (ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
108                     (state['frag_index'] + 1) * total_frags)
109                 state['total_bytes_estimate'] = estimated_size
110
111             if s['status'] == 'finished':
112                 state['frag_index'] += 1
113                 state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
114                 ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
115                 ctx['prev_frag_downloaded_bytes'] = 0
116             else:
117                 frag_downloaded_bytes = s['downloaded_bytes']
118                 state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes']
119                 if not ctx['live']:
120                     state['eta'] = self.calc_eta(
121                         start, time_now, estimated_size,
122                         state['downloaded_bytes'])
123                 state['speed'] = s.get('speed') or ctx.get('speed')
124                 ctx['speed'] = state['speed']
125                 ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes
126             self._hook_progress(state)
127
128         ctx['dl'].add_progress_hook(frag_progress_hook)
129
130         return start
131
132     def _finish_frag_download(self, ctx):
133         ctx['dest_stream'].close()
134         elapsed = time.time() - ctx['started']
135         self.try_rename(ctx['tmpfilename'], ctx['filename'])
136         fsize = os.path.getsize(encodeFilename(ctx['filename']))
137
138         self._hook_progress({
139             'downloaded_bytes': fsize,
140             'total_bytes': fsize,
141             'filename': ctx['filename'],
142             'status': 'finished',
143             'elapsed': elapsed,
144         })