_ Git - youtube-dl/blob - youtube_dl/downloader/dash.py

   1 from __future__ import unicode_literals
   2
   3 import re
   4
   5 from .common import FileDownloader
   6 from ..compat import compat_urllib_request
   7
   8
   9 class DashSegmentsFD(FileDownloader):
  10     """
  11     Download segments in a DASH manifest
  12     """
  13     def real_download(self, filename, info_dict):
  14         self.report_destination(filename)
  15         tmpfilename = self.temp_name(filename)
  16         base_url = info_dict['url']
  17         segment_urls = info_dict['segment_urls']
  18
  19         byte_counter = 0
  20
  21         def append_url_to_file(outf, target_url, target_name):
  22             self.to_screen('[DashSegments] %s: Downloading %s' % (info_dict['id'], target_name))
  23             req = compat_urllib_request.Request(target_url)
  24             data = self.ydl.urlopen(req).read()
  25             outf.write(data)
  26             return len(data)
  27
  28         def combine_url(base_url, target_url):
  29             if re.match(r'^https?://', target_url):
  30                 return target_url
  31             return '%s/%s' % (base_url, target_url)
  32
  33         with open(tmpfilename, 'wb') as outf:
  34             append_url_to_file(
  35                 outf, combine_url(base_url, info_dict['initialization_url']),
  36                 'initialization segment')
  37             for i, segment_url in enumerate(segment_urls):
  38                 segment_len = append_url_to_file(
  39                     outf, combine_url(base_url, segment_url),
  40                     'segment %d / %d' % (i + 1, len(segment_urls)))
  41                 byte_counter += segment_len
  42
  43         self.try_rename(tmpfilename, filename)
  44
  45         self._hook_progress({
  46             'downloaded_bytes': byte_counter,
  47             'total_bytes': byte_counter,
  48             'filename': filename,
  49             'status': 'finished',
  50         })
  51
  52         return True