Merge pull request #8898 from dstftw/fragment-retries

Add --fragment-retries option (Fixes #8466)
This commit is contained in:
Sergey M 2016-03-23 20:12:32 +05:00
commit 4333d56494
5 changed files with 64 additions and 16 deletions

View File

@ -144,14 +144,20 @@ def _real_main(argv=None):
if numeric_limit is None:
parser.error('invalid max_filesize specified')
opts.max_filesize = numeric_limit
if opts.retries is not None:
if opts.retries in ('inf', 'infinite'):
opts_retries = float('inf')
def parse_retries(retries):
if retries in ('inf', 'infinite'):
parsed_retries = float('inf')
else:
try:
opts_retries = int(opts.retries)
parsed_retries = int(retries)
except (TypeError, ValueError):
parser.error('invalid retry count specified')
return parsed_retries
if opts.retries is not None:
opts.retries = parse_retries(opts.retries)
if opts.fragment_retries is not None:
opts.fragment_retries = parse_retries(opts.fragment_retries)
if opts.buffersize is not None:
numeric_buffersize = FileDownloader.parse_bytes(opts.buffersize)
if numeric_buffersize is None:
@ -299,7 +305,8 @@ def _real_main(argv=None):
'force_generic_extractor': opts.force_generic_extractor,
'ratelimit': opts.ratelimit,
'nooverwrites': opts.nooverwrites,
'retries': opts_retries,
'retries': opts.retries,
'fragment_retries': opts.fragment_retries,
'buffersize': opts.buffersize,
'noresizebuffer': opts.noresizebuffer,
'continuedl': opts.continue_dl,

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@ -115,6 +115,10 @@ class FileDownloader(object):
return '%10s' % '---b/s'
return '%10s' % ('%s/s' % format_bytes(speed))
@staticmethod
def format_retries(retries):
return 'inf' if retries == float('inf') else '%.0f' % retries
@staticmethod
def best_block_size(elapsed_time, bytes):
new_min = max(bytes / 2.0, 1.0)
@ -297,7 +301,9 @@ class FileDownloader(object):
def report_retry(self, count, retries):
"""Report retry in case of HTTP error 5xx"""
self.to_screen('[download] Got server HTTP error. Retrying (attempt %d of %.0f)...' % (count, retries))
self.to_screen(
'[download] Got server HTTP error. Retrying (attempt %d of %s)...'
% (count, self.format_retries(retries)))
def report_file_already_downloaded(self, file_name):
"""Report file has already been fully downloaded."""

View File

@ -4,6 +4,7 @@ import os
import re
from .fragment import FragmentFD
from ..compat import compat_urllib_error
from ..utils import (
sanitize_open,
encodeFilename,
@ -36,20 +37,41 @@ class DashSegmentsFD(FragmentFD):
segments_filenames = []
def append_url_to_file(target_url, target_filename):
success = ctx['dl'].download(target_filename, {'url': combine_url(base_url, target_url)})
if not success:
fragment_retries = self.params.get('fragment_retries', 0)
def append_url_to_file(target_url, tmp_filename, segment_name):
target_filename = '%s-%s' % (tmp_filename, segment_name)
count = 0
while count <= fragment_retries:
try:
success = ctx['dl'].download(target_filename, {'url': combine_url(base_url, target_url)})
if not success:
return False
down, target_sanitized = sanitize_open(target_filename, 'rb')
ctx['dest_stream'].write(down.read())
down.close()
segments_filenames.append(target_sanitized)
break
except (compat_urllib_error.HTTPError, ) as err:
# YouTube may often return 404 HTTP error for a fragment causing the
# whole download to fail. However if the same fragment is immediately
# retried with the same request data this usually succeeds (1-2 attemps
# is usually enough) thus allowing to download the whole file successfully.
# So, we will retry all fragments that fail with 404 HTTP error for now.
if err.code != 404:
raise
# Retry fragment
count += 1
if count <= fragment_retries:
self.report_retry_fragment(segment_name, count, fragment_retries)
if count > fragment_retries:
self.report_error('giving up after %s fragment retries' % fragment_retries)
return False
down, target_sanitized = sanitize_open(target_filename, 'rb')
ctx['dest_stream'].write(down.read())
down.close()
segments_filenames.append(target_sanitized)
if initialization_url:
append_url_to_file(initialization_url, ctx['tmpfilename'] + '-Init')
append_url_to_file(initialization_url, ctx['tmpfilename'], 'Init')
for i, segment_url in enumerate(segment_urls):
segment_filename = '%s-Seg%d' % (ctx['tmpfilename'], i)
append_url_to_file(segment_url, segment_filename)
append_url_to_file(segment_url, ctx['tmpfilename'], 'Seg%d' % i)
self._finish_frag_download(ctx)

View File

@ -19,8 +19,17 @@ class HttpQuietDownloader(HttpFD):
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 only)
"""
def report_retry_fragment(self, fragment_name, count, retries):
self.to_screen(
'[download] Got server HTTP error. Retrying fragment %s (attempt %d of %s)...'
% (fragment_name, count, self.format_retries(retries)))
def _prepare_and_start_frag_download(self, ctx):
self._prepare_frag_download(ctx)
self._start_frag_download(ctx)

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@ -399,6 +399,10 @@ def parseOpts(overrideArguments=None):
'-R', '--retries',
dest='retries', metavar='RETRIES', default=10,
help='Number of retries (default is %default), or "infinite".')
downloader.add_option(
'--fragment-retries',
dest='fragment_retries', metavar='RETRIES', default=10,
help='Number of retries for a fragment (default is %default), or "infinite" (DASH only)')
downloader.add_option(
'--buffer-size',
dest='buffersize', metavar='SIZE', default='1024',