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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). | |
22 | """ | |
23 | ||
24 | def _prepare_and_start_frag_download(self, ctx): | |
25 | self._prepare_frag_download(ctx) | |
26 | self._start_frag_download(ctx) | |
27 | ||
28 | def _prepare_frag_download(self, ctx): | |
29 | self.to_screen('[%s] Total fragments: %d' % (self.FD_NAME, ctx['total_frags'])) | |
30 | self.report_destination(ctx['filename']) | |
31 | dl = HttpQuietDownloader( | |
32 | self.ydl, | |
33 | { | |
34 | 'continuedl': True, | |
35 | 'quiet': True, | |
36 | 'noprogress': True, | |
37 | 'ratelimit': self.params.get('ratelimit', None), | |
38 | 'test': self.params.get('test', False), | |
39 | } | |
40 | ) | |
41 | tmpfilename = self.temp_name(ctx['filename']) | |
42 | dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb') | |
43 | ctx.update({ | |
44 | 'dl': dl, | |
45 | 'dest_stream': dest_stream, | |
46 | 'tmpfilename': tmpfilename, | |
47 | }) | |
48 | ||
49 | def _start_frag_download(self, ctx): | |
50 | total_frags = ctx['total_frags'] | |
51 | # This dict stores the download progress, it's updated by the progress | |
52 | # hook | |
53 | state = { | |
54 | 'status': 'downloading', | |
55 | 'downloaded_bytes': 0, | |
56 | 'frag_index': 0, | |
57 | 'frag_count': total_frags, | |
58 | 'filename': ctx['filename'], | |
59 | 'tmpfilename': ctx['tmpfilename'], | |
60 | } | |
61 | start = time.time() | |
62 | ctx['started'] = start | |
63 | ||
64 | def frag_progress_hook(s): | |
65 | if s['status'] not in ('downloading', 'finished'): | |
66 | return | |
67 | ||
68 | frag_total_bytes = s.get('total_bytes', 0) | |
69 | if s['status'] == 'finished': | |
70 | state['downloaded_bytes'] += frag_total_bytes | |
71 | state['frag_index'] += 1 | |
72 | ||
73 | estimated_size = ( | |
74 | (state['downloaded_bytes'] + frag_total_bytes) / | |
75 | (state['frag_index'] + 1) * total_frags) | |
76 | time_now = time.time() | |
77 | state['total_bytes_estimate'] = estimated_size | |
78 | state['elapsed'] = time_now - start | |
79 | ||
80 | if s['status'] == 'finished': | |
81 | progress = self.calc_percent(state['frag_index'], total_frags) | |
82 | else: | |
83 | frag_downloaded_bytes = s['downloaded_bytes'] | |
84 | frag_progress = self.calc_percent(frag_downloaded_bytes, | |
85 | frag_total_bytes) | |
86 | progress = self.calc_percent(state['frag_index'], total_frags) | |
87 | progress += frag_progress / float(total_frags) | |
88 | ||
89 | state['eta'] = self.calc_eta( | |
90 | start, time_now, estimated_size, state['downloaded_bytes'] + frag_downloaded_bytes) | |
91 | state['speed'] = s.get('speed') | |
92 | self._hook_progress(state) | |
93 | ||
94 | ctx['dl'].add_progress_hook(frag_progress_hook) | |
95 | ||
96 | return start | |
97 | ||
98 | def _finish_frag_download(self, ctx): | |
99 | ctx['dest_stream'].close() | |
100 | elapsed = time.time() - ctx['started'] | |
101 | self.try_rename(ctx['tmpfilename'], ctx['filename']) | |
102 | fsize = os.path.getsize(encodeFilename(ctx['filename'])) | |
103 | ||
104 | self._hook_progress({ | |
105 | 'downloaded_bytes': fsize, | |
106 | 'total_bytes': fsize, | |
107 | 'filename': ctx['filename'], | |
108 | 'status': 'finished', | |
109 | 'elapsed': elapsed, | |
110 | }) |