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-rw-r--r--youtube_dl/downloader/http.py14
1 files changed, 14 insertions, 0 deletions
diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index b7f144af9..b2e82cfde 100644
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -57,6 +57,20 @@ class HttpFD(FileDownloader):
# Establish connection
try:
data = self.ydl.urlopen(request)
+
+ if resume_len > 0:
+ content_range = data.headers.get('Content-Range')
+ if content_range:
+ content_range_m = re.search(r'bytes (\d+)-', content_range)
+ if content_range_m:
+ # Content-Range is correct - go on
+ if resume_len == int(content_range_m.group(1)):
+ break
+
+ # Content-Range is invalid - wipe the file and do entire redownload
+ resume_len = 0
+ open_mode = 'wb'
+
break
except (compat_urllib_error.HTTPError, ) as err:
if (err.code < 500 or err.code >= 600) and err.code != 416: