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

   1 from __future__ import unicode_literals
   2
   3 import os
   4 import re
   5
   6 from .fragment import FragmentFD
   7 from ..utils import (
   8     sanitize_open,
   9     encodeFilename,
  10 )
  11
  12
  13 class DashSegmentsFD(FragmentFD):
  14     """
  15     Download segments in a DASH manifest
  16     """
  17
  18     FD_NAME = 'dashsegments'
  19
  20     def real_download(self, filename, info_dict):
  21         base_url = info_dict['url']
  22         segment_urls = [info_dict['segment_urls'][0]] if self.params.get('test', False) else info_dict['segment_urls']
  23         initialization_url = info_dict.get('initialization_url')
  24
  25         ctx = {
  26             'filename': filename,
  27             'total_frags': len(segment_urls) + (1 if initialization_url else 0),
  28         }
  29
  30         self._prepare_and_start_frag_download(ctx)
  31
  32         def combine_url(base_url, target_url):
  33             if re.match(r'^https?://', target_url):
  34                 return target_url
  35             return '%s%s%s' % (base_url, '' if base_url.endswith('/') else '/', target_url)
  36
  37         segments_filenames = []
  38
  39         def append_url_to_file(target_url, target_filename):
  40             success = ctx['dl'].download(target_filename, {'url': combine_url(base_url, target_url)})
  41             if not success:
  42                 return False
  43             down, target_sanitized = sanitize_open(target_filename, 'rb')
  44             ctx['dest_stream'].write(down.read())
  45             down.close()
  46             segments_filenames.append(target_sanitized)
  47
  48         if initialization_url:
  49             append_url_to_file(initialization_url, ctx['tmpfilename'] + '-Init')
  50         for i, segment_url in enumerate(segment_urls):
  51             segment_filename = '%s-Seg%d' % (ctx['tmpfilename'], i)
  52             append_url_to_file(segment_url, segment_filename)
  53
  54         self._finish_frag_download(ctx)
  55
  56         for segment_file in segments_filenames:
  57             os.remove(encodeFilename(segment_file))
  58
  59         return True