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from __future__ import unicode_literals
import re
from .common import FileDownloader
from ..compat import compat_urllib_request
class DashSegmentsFD(FileDownloader):
"""
Download segments in a DASH manifest
"""
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']
is_test = self.params.get('test', False)
remaining_bytes = self._TEST_FILE_SIZE if is_test else None
byte_counter = 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 = compat_urllib_request.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)
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:
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
self.try_rename(tmpfilename, filename)
self._hook_progress({
'downloaded_bytes': byte_counter,
'total_bytes': byte_counter,
'filename': filename,
'status': 'finished',
})
return True
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