mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-11-24 02:35:12 +00:00
253 lines
9.6 KiB
Python
253 lines
9.6 KiB
Python
from __future__ import division, unicode_literals
|
|
|
|
import os
|
|
import time
|
|
import json
|
|
|
|
from .common import FileDownloader
|
|
from .http import HttpFD
|
|
from ..utils import (
|
|
error_to_compat_str,
|
|
encodeFilename,
|
|
sanitize_open,
|
|
sanitized_Request,
|
|
)
|
|
|
|
|
|
class HttpQuietDownloader(HttpFD):
|
|
def to_screen(self, *args, **kargs):
|
|
pass
|
|
|
|
|
|
class FragmentFD(FileDownloader):
|
|
"""
|
|
A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
|
|
|
|
Available options:
|
|
|
|
fragment_retries: Number of times to retry a fragment for HTTP error (DASH
|
|
and hlsnative only)
|
|
skip_unavailable_fragments:
|
|
Skip unavailable fragments (DASH and hlsnative only)
|
|
keep_fragments: Keep downloaded fragments on disk after downloading is
|
|
finished
|
|
|
|
For each incomplete fragment download youtube-dl keeps on disk a special
|
|
bookkeeping file with download state and metadata (in future such files will
|
|
be used for any incomplete download handled by youtube-dl). This file is
|
|
used to properly handle resuming, check download file consistency and detect
|
|
potential errors. The file has a .ytdl extension and represents a standard
|
|
JSON file of the following format:
|
|
|
|
extractor:
|
|
Dictionary of extractor related data. TBD.
|
|
|
|
downloader:
|
|
Dictionary of downloader related data. May contain following data:
|
|
current_fragment:
|
|
Dictionary with current (being downloaded) fragment data:
|
|
index: 0-based index of current fragment among all fragments
|
|
fragment_count:
|
|
Total count of fragments
|
|
|
|
This feature is experimental and file format may change in future.
|
|
"""
|
|
|
|
def report_retry_fragment(self, err, frag_index, count, retries):
|
|
self.to_screen(
|
|
'[download] Got server HTTP error: %s. Retrying fragment %d (attempt %d of %s)...'
|
|
% (error_to_compat_str(err), frag_index, count, self.format_retries(retries)))
|
|
|
|
def report_skip_fragment(self, frag_index):
|
|
self.to_screen('[download] Skipping fragment %d...' % frag_index)
|
|
|
|
def _prepare_url(self, info_dict, url):
|
|
headers = info_dict.get('http_headers')
|
|
return sanitized_Request(url, None, headers) if headers else url
|
|
|
|
def _prepare_and_start_frag_download(self, ctx):
|
|
self._prepare_frag_download(ctx)
|
|
self._start_frag_download(ctx)
|
|
|
|
@staticmethod
|
|
def __do_ytdl_file(ctx):
|
|
return not ctx['live'] and not ctx['tmpfilename'] == '-'
|
|
|
|
def _read_ytdl_file(self, ctx):
|
|
stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'r')
|
|
ctx['fragment_index'] = json.loads(stream.read())['downloader']['current_fragment']['index']
|
|
stream.close()
|
|
|
|
def _write_ytdl_file(self, ctx):
|
|
frag_index_stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'w')
|
|
downloader = {
|
|
'current_fragment': {
|
|
'index': ctx['fragment_index'],
|
|
},
|
|
}
|
|
if ctx.get('fragment_count') is not None:
|
|
downloader['fragment_count'] = ctx['fragment_count']
|
|
frag_index_stream.write(json.dumps({'downloader': downloader}))
|
|
frag_index_stream.close()
|
|
|
|
def _download_fragment(self, ctx, frag_url, info_dict, headers=None):
|
|
fragment_filename = '%s-Frag%d' % (ctx['tmpfilename'], ctx['fragment_index'])
|
|
success = ctx['dl'].download(fragment_filename, {
|
|
'url': frag_url,
|
|
'http_headers': headers or info_dict.get('http_headers'),
|
|
})
|
|
if not success:
|
|
return False, None
|
|
down, frag_sanitized = sanitize_open(fragment_filename, 'rb')
|
|
ctx['fragment_filename_sanitized'] = frag_sanitized
|
|
frag_content = down.read()
|
|
down.close()
|
|
return True, frag_content
|
|
|
|
def _append_fragment(self, ctx, frag_content):
|
|
try:
|
|
ctx['dest_stream'].write(frag_content)
|
|
ctx['dest_stream'].flush()
|
|
finally:
|
|
if self.__do_ytdl_file(ctx):
|
|
self._write_ytdl_file(ctx)
|
|
if not self.params.get('keep_fragments', False):
|
|
os.remove(encodeFilename(ctx['fragment_filename_sanitized']))
|
|
del ctx['fragment_filename_sanitized']
|
|
|
|
def _prepare_frag_download(self, ctx):
|
|
if 'live' not in ctx:
|
|
ctx['live'] = False
|
|
if not ctx['live']:
|
|
total_frags_str = '%d' % ctx['total_frags']
|
|
ad_frags = ctx.get('ad_frags', 0)
|
|
if ad_frags:
|
|
total_frags_str += ' (not including %d ad)' % ad_frags
|
|
else:
|
|
total_frags_str = 'unknown (live)'
|
|
self.to_screen(
|
|
'[%s] Total fragments: %s' % (self.FD_NAME, total_frags_str))
|
|
self.report_destination(ctx['filename'])
|
|
dl = HttpQuietDownloader(
|
|
self.ydl,
|
|
{
|
|
'continuedl': True,
|
|
'quiet': True,
|
|
'noprogress': True,
|
|
'ratelimit': self.params.get('ratelimit'),
|
|
'retries': self.params.get('retries', 0),
|
|
'nopart': self.params.get('nopart', False),
|
|
'test': self.params.get('test', False),
|
|
}
|
|
)
|
|
tmpfilename = self.temp_name(ctx['filename'])
|
|
open_mode = 'wb'
|
|
resume_len = 0
|
|
|
|
# Establish possible resume length
|
|
if os.path.isfile(encodeFilename(tmpfilename)):
|
|
open_mode = 'ab'
|
|
resume_len = os.path.getsize(encodeFilename(tmpfilename))
|
|
|
|
# Should be initialized before ytdl file check
|
|
ctx.update({
|
|
'tmpfilename': tmpfilename,
|
|
'fragment_index': 0,
|
|
})
|
|
|
|
if self.__do_ytdl_file(ctx):
|
|
if os.path.isfile(encodeFilename(self.ytdl_filename(ctx['filename']))):
|
|
self._read_ytdl_file(ctx)
|
|
if ctx['fragment_index'] > 0 and resume_len == 0:
|
|
self.report_warning(
|
|
'Inconsistent state of incomplete fragment download. '
|
|
'Restarting from the beginning...')
|
|
ctx['fragment_index'] = resume_len = 0
|
|
self._write_ytdl_file(ctx)
|
|
else:
|
|
self._write_ytdl_file(ctx)
|
|
assert ctx['fragment_index'] == 0
|
|
|
|
dest_stream, tmpfilename = sanitize_open(tmpfilename, open_mode)
|
|
|
|
ctx.update({
|
|
'dl': dl,
|
|
'dest_stream': dest_stream,
|
|
'tmpfilename': tmpfilename,
|
|
# Total complete fragments downloaded so far in bytes
|
|
'complete_frags_downloaded_bytes': resume_len,
|
|
})
|
|
|
|
def _start_frag_download(self, ctx):
|
|
total_frags = ctx['total_frags']
|
|
# This dict stores the download progress, it's updated by the progress
|
|
# hook
|
|
state = {
|
|
'status': 'downloading',
|
|
'downloaded_bytes': ctx['complete_frags_downloaded_bytes'],
|
|
'fragment_index': ctx['fragment_index'],
|
|
'fragment_count': total_frags,
|
|
'filename': ctx['filename'],
|
|
'tmpfilename': ctx['tmpfilename'],
|
|
}
|
|
|
|
start = time.time()
|
|
ctx.update({
|
|
'started': start,
|
|
# Amount of fragment's bytes downloaded by the time of the previous
|
|
# frag progress hook invocation
|
|
'prev_frag_downloaded_bytes': 0,
|
|
})
|
|
|
|
def frag_progress_hook(s):
|
|
if s['status'] not in ('downloading', 'finished'):
|
|
return
|
|
|
|
time_now = time.time()
|
|
state['elapsed'] = time_now - start
|
|
frag_total_bytes = s.get('total_bytes') or 0
|
|
if not ctx['live']:
|
|
estimated_size = (
|
|
(ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
|
|
(state['fragment_index'] + 1) * total_frags)
|
|
state['total_bytes_estimate'] = estimated_size
|
|
|
|
if s['status'] == 'finished':
|
|
state['fragment_index'] += 1
|
|
ctx['fragment_index'] = state['fragment_index']
|
|
state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
|
|
ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
|
|
ctx['prev_frag_downloaded_bytes'] = 0
|
|
else:
|
|
frag_downloaded_bytes = s['downloaded_bytes']
|
|
state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes']
|
|
if not ctx['live']:
|
|
state['eta'] = self.calc_eta(
|
|
start, time_now, estimated_size,
|
|
state['downloaded_bytes'])
|
|
state['speed'] = s.get('speed') or ctx.get('speed')
|
|
ctx['speed'] = state['speed']
|
|
ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes
|
|
self._hook_progress(state)
|
|
|
|
ctx['dl'].add_progress_hook(frag_progress_hook)
|
|
|
|
return start
|
|
|
|
def _finish_frag_download(self, ctx):
|
|
ctx['dest_stream'].close()
|
|
if self.__do_ytdl_file(ctx):
|
|
ytdl_filename = encodeFilename(self.ytdl_filename(ctx['filename']))
|
|
if os.path.isfile(ytdl_filename):
|
|
os.remove(ytdl_filename)
|
|
elapsed = time.time() - ctx['started']
|
|
self.try_rename(ctx['tmpfilename'], ctx['filename'])
|
|
fsize = os.path.getsize(encodeFilename(ctx['filename']))
|
|
|
|
self._hook_progress({
|
|
'downloaded_bytes': fsize,
|
|
'total_bytes': fsize,
|
|
'filename': ctx['filename'],
|
|
'status': 'finished',
|
|
'elapsed': elapsed,
|
|
})
|