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-rw-r--r--youtube_dl/downloader/dash.py66
1 files changed, 66 insertions, 0 deletions
diff --git a/youtube_dl/downloader/dash.py b/youtube_dl/downloader/dash.py
new file mode 100644
index 000000000..8b6fa2753
--- /dev/null
+++ b/youtube_dl/downloader/dash.py
@@ -0,0 +1,66 @@
+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