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Merge pull request #8479 from remitamine/dash_downloader

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[downloader/dash] Implement dashsegments fd in terms of fragment fd
This commit is contained in:
remitamine 2016-02-13 21:12:33 +01:00
commit fc2e70ee90
1 changed files with 35 additions and 44 deletions
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79
youtube_dl/downloader/dash.py
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@ -1,67 +1,58 @@
from __future__ import unicode_literals
import os
import re
from .common import FileDownloader
from ..utils import sanitized_Request
from .fragment import FragmentFD
from ..utils import (
sanitize_open,
encodeFilename,
)
class DashSegmentsFD(FileDownloader):
class DashSegmentsFD(FragmentFD):
"""
Download segments in a DASH manifest
"""
FD_NAME = 'dashsegments'
def real_download(self, filename, info_dict):
self.report_destination(filename)
tmpfilename = self.temp_name(filename)
base_url = info_dict['url']
segment_urls = info_dict['segment_urls']
segment_urls = [info_dict['segment_urls'][0]] if self.params.get('test', False) else info_dict['segment_urls']
initialization_url = info_dict.get('initialization_url')
is_test = self.params.get('test', False)
remaining_bytes = self._TEST_FILE_SIZE if is_test else None
byte_counter = 0
ctx = {
'filename': filename,
'total_frags': len(segment_urls) + (1 if initialization_url else 0),
}
def append_url_to_file(outf, target_url, target_name, remaining_bytes=None):
self.to_screen('[DashSegments] %s: Downloading %s' % (info_dict['id'], target_name))
req = sanitized_Request(target_url)
if remaining_bytes is not None:
req.add_header('Range', 'bytes=0-%d' % (remaining_bytes - 1))
data = self.ydl.urlopen(req).read()
if remaining_bytes is not None:
data = data[:remaining_bytes]
outf.write(data)
return len(data)
self._prepare_and_start_frag_download(ctx)
def combine_url(base_url, target_url):
if re.match(r'^https?://', target_url):
return target_url
return '%s%s%s' % (base_url, '' if base_url.endswith('/') else '/', target_url)
with open(tmpfilename, 'wb') as outf:
if info_dict.get('initialization_url'):
append_url_to_file(
outf, combine_url(base_url, info_dict['initialization_url']),
'initialization segment')
for i, segment_url in enumerate(segment_urls):
segment_len = append_url_to_file(
outf, combine_url(base_url, segment_url),
'segment %d / %d' % (i + 1, len(segment_urls)),
remaining_bytes)
byte_counter += segment_len
if remaining_bytes is not None:
remaining_bytes -= segment_len
if remaining_bytes <= 0:
break
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:
return False
down, target_sanitized = sanitize_open(target_filename, 'rb')
ctx['dest_stream'].write(down.read())
down.close()
segments_filenames.append(target_sanitized)
self.try_rename(tmpfilename, filename)
if initialization_url:
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)
self._hook_progress({
'downloaded_bytes': byte_counter,
'total_bytes': byte_counter,
'filename': filename,
'status': 'finished',
})
self._finish_frag_download(ctx)
for segment_file in segments_filenames:
os.remove(encodeFilename(segment_file))
return True