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 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)
"""
+ 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)
+ def _read_ytdl_file(self, ctx):
+ stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'r')
+ ctx['fragment_index'] = json.loads(stream.read())['download']['current_fragment_index']
+ stream.close()
+
+ def _write_ytdl_file(self, ctx):
+ frag_index_stream, _ = sanitize_open(self.ytdl_filename(ctx['filename']), 'w')
+ frag_index_stream.write(json.dumps({
+ 'download': {
+ 'current_fragment_index': ctx['fragment_index']
+ },
+ }))
+ 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)
+ finally:
+ if not (ctx.get('live') or ctx['tmpfilename'] == '-'):
+ self._write_ytdl_file(ctx)
+ os.remove(ctx['fragment_filename_sanitized'])
+ del ctx['fragment_filename_sanitized']
+
def _prepare_frag_download(self, ctx):
if 'live' not in ctx:
ctx['live'] = False
'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'])
- dest_stream, tmpfilename = sanitize_open(tmpfilename, 'wb')
+ 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))
+
+ ctx['fragment_index'] = 0
+ if os.path.isfile(encodeFilename(self.ytdl_filename(ctx['filename']))):
+ self._read_ytdl_file(ctx)
+ else:
+ self._write_ytdl_file(ctx)
+
+ if ctx['fragment_index'] > 0:
+ assert resume_len > 0
+ else:
+ assert resume_len == 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):
# hook
state = {
'status': 'downloading',
- 'downloaded_bytes': 0,
- 'frag_index': 0,
- 'frag_count': total_frags,
+ '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,
- # Total complete fragments downloaded so far in bytes
- 'complete_frags_downloaded_bytes': 0,
# Amount of fragment's bytes downloaded by the time of the previous
# frag progress hook invocation
'prev_frag_downloaded_bytes': 0,
if not ctx['live']:
estimated_size = (
(ctx['complete_frags_downloaded_bytes'] + frag_total_bytes) /
- (state['frag_index'] + 1) * total_frags)
+ (state['fragment_index'] + 1) * total_frags)
state['total_bytes_estimate'] = estimated_size
if s['status'] == 'finished':
- state['frag_index'] += 1
+ 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
def _finish_frag_download(self, ctx):
ctx['dest_stream'].close()
+ 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']))
projects / youtube-dl / blobdiff