mirror of
https://github.com/yt-dlp/yt-dlp.git
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273762c8d0
YouTube has removed support for the old GET based live chat API, and it's now returning 404 Authored by siikamiika
302 lines
12 KiB
Python
302 lines
12 KiB
Python
from __future__ import division, unicode_literals
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import os
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import time
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import json
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from .common import FileDownloader
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from .http import HttpFD
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from ..utils import (
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error_to_compat_str,
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encodeFilename,
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sanitize_open,
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sanitized_Request,
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)
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class HttpQuietDownloader(HttpFD):
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def to_screen(self, *args, **kargs):
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pass
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class FragmentFD(FileDownloader):
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"""
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A base file downloader class for fragmented media (e.g. f4m/m3u8 manifests).
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Available options:
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fragment_retries: Number of times to retry a fragment for HTTP error (DASH
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and hlsnative only)
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skip_unavailable_fragments:
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Skip unavailable fragments (DASH and hlsnative only)
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keep_fragments: Keep downloaded fragments on disk after downloading is
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finished
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For each incomplete fragment download youtube-dlc keeps on disk a special
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bookkeeping file with download state and metadata (in future such files will
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be used for any incomplete download handled by youtube-dlc). This file is
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used to properly handle resuming, check download file consistency and detect
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potential errors. The file has a .ytdl extension and represents a standard
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JSON file of the following format:
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extractor:
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Dictionary of extractor related data. TBD.
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downloader:
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Dictionary of downloader related data. May contain following data:
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current_fragment:
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Dictionary with current (being downloaded) fragment data:
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index: 0-based index of current fragment among all fragments
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fragment_count:
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Total count of fragments
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This feature is experimental and file format may change in future.
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"""
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def report_retry_fragment(self, err, frag_index, count, retries):
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self.to_screen(
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'[download] Got server HTTP error: %s. Retrying fragment %d (attempt %d of %s)...'
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% (error_to_compat_str(err), frag_index, count, self.format_retries(retries)))
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def report_skip_fragment(self, frag_index):
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self.to_screen('[download] Skipping fragment %d...' % frag_index)
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def _prepare_url(self, info_dict, url):
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headers = info_dict.get('http_headers')
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return sanitized_Request(url, None, headers) if headers else url
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def _prepare_and_start_frag_download(self, ctx):
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self._prepare_frag_download(ctx)
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self._start_frag_download(ctx)
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@staticmethod
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def __do_ytdl_file(ctx):
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return not ctx['live'] and not ctx['tmpfilename'] == '-'
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def _read_ytdl_file(self, ctx):
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assert 'ytdl_corrupt' not in ctx
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stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'r')
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try:
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ctx['fragment_index'] = json.loads(stream.read())['downloader']['current_fragment']['index']
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except Exception:
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ctx['ytdl_corrupt'] = True
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finally:
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stream.close()
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def _write_ytdl_file(self, ctx):
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frag_index_stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'w')
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downloader = {
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'current_fragment': {
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'index': ctx['fragment_index'],
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},
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}
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if ctx.get('fragment_count') is not None:
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downloader['fragment_count'] = ctx['fragment_count']
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frag_index_stream.write(json.dumps({'downloader': downloader}))
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frag_index_stream.close()
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def _download_fragment(self, ctx, frag_url, info_dict, headers=None, request_data=None):
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fragment_filename = '%s-Frag%d' % (ctx['tmpfilename'], ctx['fragment_index'])
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fragment_info_dict = {
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'url': frag_url,
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'http_headers': headers or info_dict.get('http_headers'),
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'request_data': request_data,
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}
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success = ctx['dl'].download(fragment_filename, fragment_info_dict)
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if not success:
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return False, None
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if fragment_info_dict.get('filetime'):
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ctx['fragment_filetime'] = fragment_info_dict.get('filetime')
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down, frag_sanitized = sanitize_open(fragment_filename, 'rb')
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ctx['fragment_filename_sanitized'] = frag_sanitized
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frag_content = down.read()
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down.close()
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return True, frag_content
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def _append_fragment(self, ctx, frag_content):
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try:
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ctx['dest_stream'].write(frag_content)
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ctx['dest_stream'].flush()
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finally:
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if self.__do_ytdl_file(ctx):
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self._write_ytdl_file(ctx)
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if not self.params.get('keep_fragments', False):
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os.remove(encodeFilename(ctx['fragment_filename_sanitized']))
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del ctx['fragment_filename_sanitized']
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def _prepare_frag_download(self, ctx):
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if 'live' not in ctx:
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ctx['live'] = False
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if not ctx['live']:
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total_frags_str = '%d' % ctx['total_frags']
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ad_frags = ctx.get('ad_frags', 0)
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if ad_frags:
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total_frags_str += ' (not including %d ad)' % ad_frags
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else:
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total_frags_str = 'unknown (live)'
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self.to_screen(
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'[%s] Total fragments: %s' % (self.FD_NAME, total_frags_str))
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self.report_destination(ctx['filename'])
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dl = HttpQuietDownloader(
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self.ydl,
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{
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'continuedl': True,
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'quiet': True,
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'noprogress': True,
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'ratelimit': self.params.get('ratelimit'),
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'retries': self.params.get('retries', 0),
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'nopart': self.params.get('nopart', False),
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'test': self.params.get('test', False),
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}
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)
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tmpfilename = self.temp_name(ctx['filename'])
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open_mode = 'wb'
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resume_len = 0
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# Establish possible resume length
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if os.path.isfile(encodeFilename(tmpfilename)):
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open_mode = 'ab'
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resume_len = os.path.getsize(encodeFilename(tmpfilename))
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# Should be initialized before ytdl file check
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ctx.update({
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'tmpfilename': tmpfilename,
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'fragment_index': 0,
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})
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if self.__do_ytdl_file(ctx):
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if os.path.isfile(encodeFilename(self.ytdl_filename(ctx['filename']))):
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self._read_ytdl_file(ctx)
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is_corrupt = ctx.get('ytdl_corrupt') is True
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is_inconsistent = ctx['fragment_index'] > 0 and resume_len == 0
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if is_corrupt or is_inconsistent:
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message = (
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'.ytdl file is corrupt' if is_corrupt else
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'Inconsistent state of incomplete fragment download')
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self.report_warning(
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'%s. Restarting from the beginning...' % message)
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ctx['fragment_index'] = resume_len = 0
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if 'ytdl_corrupt' in ctx:
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del ctx['ytdl_corrupt']
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self._write_ytdl_file(ctx)
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else:
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self._write_ytdl_file(ctx)
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assert ctx['fragment_index'] == 0
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dest_stream, tmpfilename = sanitize_open(tmpfilename, open_mode)
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ctx.update({
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'dl': dl,
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'dest_stream': dest_stream,
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'tmpfilename': tmpfilename,
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# Total complete fragments downloaded so far in bytes
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'complete_frags_downloaded_bytes': resume_len,
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})
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def _start_frag_download(self, ctx):
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resume_len = ctx['complete_frags_downloaded_bytes']
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total_frags = ctx['total_frags']
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# This dict stores the download progress, it's updated by the progress
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# hook
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state = {
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'status': 'downloading',
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'downloaded_bytes': resume_len,
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'fragment_index': ctx['fragment_index'],
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'fragment_count': total_frags,
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'filename': ctx['filename'],
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'tmpfilename': ctx['tmpfilename'],
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}
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start = time.time()
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ctx.update({
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'started': start,
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# Amount of fragment's bytes downloaded by the time of the previous
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# frag progress hook invocation
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'prev_frag_downloaded_bytes': 0,
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})
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def frag_progress_hook(s):
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if s['status'] not in ('downloading', 'finished'):
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return
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time_now = time.time()
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state['elapsed'] = time_now - start
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frag_total_bytes = s.get('total_bytes') or 0
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if not ctx['live']:
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estimated_size = (
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(ctx['complete_frags_downloaded_bytes'] + frag_total_bytes)
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/ (state['fragment_index'] + 1) * total_frags)
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state['total_bytes_estimate'] = estimated_size
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if s['status'] == 'finished':
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state['fragment_index'] += 1
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ctx['fragment_index'] = state['fragment_index']
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state['downloaded_bytes'] += frag_total_bytes - ctx['prev_frag_downloaded_bytes']
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ctx['complete_frags_downloaded_bytes'] = state['downloaded_bytes']
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ctx['prev_frag_downloaded_bytes'] = 0
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else:
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frag_downloaded_bytes = s['downloaded_bytes']
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state['downloaded_bytes'] += frag_downloaded_bytes - ctx['prev_frag_downloaded_bytes']
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if not ctx['live']:
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state['eta'] = self.calc_eta(
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start, time_now, estimated_size - resume_len,
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state['downloaded_bytes'] - resume_len)
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state['speed'] = s.get('speed') or ctx.get('speed')
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ctx['speed'] = state['speed']
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ctx['prev_frag_downloaded_bytes'] = frag_downloaded_bytes
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self._hook_progress(state)
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ctx['dl'].add_progress_hook(frag_progress_hook)
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return start
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def _finish_frag_download(self, ctx):
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ctx['dest_stream'].close()
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if self.__do_ytdl_file(ctx):
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ytdl_filename = encodeFilename(self.ytdl_filename(ctx['filename']))
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if os.path.isfile(ytdl_filename):
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os.remove(ytdl_filename)
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elapsed = time.time() - ctx['started']
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if ctx['tmpfilename'] == '-':
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downloaded_bytes = ctx['complete_frags_downloaded_bytes']
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else:
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self.try_rename(ctx['tmpfilename'], ctx['filename'])
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if self.params.get('updatetime', True):
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filetime = ctx.get('fragment_filetime')
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if filetime:
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try:
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os.utime(ctx['filename'], (time.time(), filetime))
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except Exception:
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pass
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downloaded_bytes = os.path.getsize(encodeFilename(ctx['filename']))
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self._hook_progress({
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'downloaded_bytes': downloaded_bytes,
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'total_bytes': downloaded_bytes,
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'filename': ctx['filename'],
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'status': 'finished',
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'elapsed': elapsed,
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})
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def _prepare_external_frag_download(self, ctx):
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if 'live' not in ctx:
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ctx['live'] = False
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if not ctx['live']:
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total_frags_str = '%d' % ctx['total_frags']
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ad_frags = ctx.get('ad_frags', 0)
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if ad_frags:
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total_frags_str += ' (not including %d ad)' % ad_frags
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else:
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total_frags_str = 'unknown (live)'
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self.to_screen(
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'[%s] Total fragments: %s' % (self.FD_NAME, total_frags_str))
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tmpfilename = self.temp_name(ctx['filename'])
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# Should be initialized before ytdl file check
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ctx.update({
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'tmpfilename': tmpfilename,
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'fragment_index': 0,
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})
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