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95d8f7ea S |
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 | encodeFilename, | |
10 | sanitize_open, | |
11 | ) | |
12 | ||
13 | ||
14 | class HttpQuietDownloader(HttpFD): | |
15 | def to_screen(self, *args, **kargs): | |
16 | pass | |
17 | ||
18 | ||
19 | class FragmentFD(FileDownloader): | |
20 | """ | |
21 | A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests). | |
16a8b798 S |
22 | |
23 | Available options: | |
24 | ||
9603b660 S |
25 | fragment_retries: Number of times to retry a fragment for HTTP error (DASH |
26 | and hlsnative only) | |
27 | skip_unavailable_fragments: | |
28 | Skip unavailable fragments (DASH and hlsnative only) | |
95d8f7ea S |
29 | """ |
30 | ||
721f26b8 S |
31 | def report_retry_fragment(self, fragment_name, count, retries): |
32 | self.to_screen( | |
9603b660 | 33 | '[download] Got server HTTP error: %s. Retrying fragment %s (attempt %d of %s)...' |
617e58d8 | 34 | % (fragment_name, count, self.format_retries(retries))) |
721f26b8 | 35 | |
9603b660 S |
36 | def report_skip_fragment(self, fragment_name): |
37 | self.to_screen('[download] Skipping fragment %s...' % fragment_name) | |
38 | ||
95d8f7ea S |
39 | def _prepare_and_start_frag_download(self, ctx): |
40 | self._prepare_frag_download(ctx) | |
41 | self._start_frag_download(ctx) | |
42 | ||
43 | def _prepare_frag_download(self, ctx): | |
5fa1702c S |
44 | if 'live' not in ctx: |
45 | ctx['live'] = False | |
46 | self.to_screen( | |
47 | '[%s] Total fragments: %s' | |
48 | % (self.FD_NAME, ctx['total_frags'] if not ctx['live'] else 'unknown (live)')) | |
95d8f7ea S |
49 | self.report_destination(ctx['filename']) |
50 | dl = HttpQuietDownloader( | |
51 | self.ydl, | |
52 | { | |
53 | 'continuedl': True, | |
54 | 'quiet': True, | |
55 | 'noprogress': True, | |
d800609c | 56 | 'ratelimit': self.params.get('ratelimit'), |
6828c809 | 57 | 'retries': self.params.get('retries', 0), |
95d8f7ea S |
58 | 'test': self.params.get('test', False), |
59 | } | |
60 | ) | |
61 | tmpfilename = self.temp_name(ctx['filename']) | |
62 | dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb') | |
63 | ctx.update({ | |
64 | 'dl': dl, | |
65 | 'dest_stream': dest_stream, | |
66 | 'tmpfilename': tmpfilename, | |
67 | }) | |
68 | ||
69 | def _start_frag_download(self, ctx): | |
70 | total_frags = ctx['total_frags'] | |
71 | # This dict stores the download progress, it's updated by the progress | |
72 | # hook | |
73 | state = { | |
74 | 'status': 'downloading', | |
75 | 'downloaded_bytes': 0, | |
76 | 'frag_index': 0, | |
77 | 'frag_count': total_frags, | |
78 | 'filename': ctx['filename'], | |
79 | 'tmpfilename': ctx['tmpfilename'], | |
b83b782d S |
80 | } |
81 | ||
82 | start = time.time() | |
83 | ctx.update({ | |
84 | 'started': start, | |
709185a2 | 85 | # Total complete fragments downloaded so far in bytes |
b83b782d | 86 | 'complete_frags_downloaded_bytes': 0, |
709185a2 S |
87 | # Amount of fragment's bytes downloaded by the time of the previous |
88 | # frag progress hook invocation | |
b83b782d S |
89 | 'prev_frag_downloaded_bytes': 0, |
90 | }) | |
95d8f7ea S |
91 | |
92 | def frag_progress_hook(s): | |
93 | if s['status'] not in ('downloading', 'finished'): | |
94 | return | |
95 | ||
5fa1702c | 96 | time_now = time.time() |
2c2f1efd | 97 | state['elapsed'] = time_now - start |
3c91e416 | 98 | frag_total_bytes = s.get('total_bytes') or 0 |
5fa1702c S |
99 | if not ctx['live']: |
100 | estimated_size = ( | |
101 | (ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) / | |
102 | (state['frag_index'] + 1) * total_frags) | |
103 | state['total_bytes_estimate'] = estimated_size | |
95d8f7ea | 104 | |
709185a2 S |
105 | if s['status'] == 'finished': |
106 | state['frag_index'] += 1 | |
b83b782d S |
107 | state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes'] |
108 | ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes'] | |
109 | ctx['prev_frag_downloaded_bytes'] = 0 | |
709185a2 S |
110 | else: |
111 | frag_downloaded_bytes = s['downloaded_bytes'] | |
b83b782d | 112 | state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes'] |
5fa1702c S |
113 | if not ctx['live']: |
114 | state['eta'] = self.calc_eta( | |
115 | start, time_now, estimated_size, | |
116 | state['downloaded_bytes']) | |
1b5284b1 S |
117 | state['speed'] = s.get('speed') or ctx.get('speed') |
118 | ctx['speed'] = state['speed'] | |
b83b782d | 119 | ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes |
95d8f7ea S |
120 | self._hook_progress(state) |
121 | ||
122 | ctx['dl'].add_progress_hook(frag_progress_hook) | |
123 | ||
124 | return start | |
125 | ||
126 | def _finish_frag_download(self, ctx): | |
127 | ctx['dest_stream'].close() | |
128 | elapsed = time.time() - ctx['started'] | |
129 | self.try_rename(ctx['tmpfilename'], ctx['filename']) | |
130 | fsize = os.path.getsize(encodeFilename(ctx['filename'])) | |
131 | ||
132 | self._hook_progress({ | |
133 | 'downloaded_bytes': fsize, | |
134 | 'total_bytes': fsize, | |
135 | 'filename': ctx['filename'], | |
136 | 'status': 'finished', | |
137 | 'elapsed': elapsed, | |
138 | }) |