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-rw-r--r--youtube_dl/extractor/common.py13
1 files changed, 12 insertions, 1 deletions
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 647720c8a..da4193734 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -74,7 +74,7 @@ class InfoExtractor(object):
"http", "https", "rtsp", "rtmp", "m3u8" or so.
* preference Order number of this format. If this field is
present and not None, the formats get sorted
- by this field.
+ by this field, regardless of all other values.
-1 for default (order by other properties),
-2 or smaller for less than default.
* quality Order number of the video quality of this
@@ -252,6 +252,17 @@ class InfoExtractor(object):
outf.write(webpage_bytes)
content = webpage_bytes.decode(encoding, 'replace')
+
+ if (u'<title>Access to this site is blocked</title>' in content and
+ u'Websense' in content[:512]):
+ msg = u'Access to this webpage has been blocked by Websense filtering software in your network.'
+ blocked_iframe = self._html_search_regex(
+ r'<iframe src="([^"]+)"', content,
+ u'Websense information URL', default=None)
+ if blocked_iframe:
+ msg += u' Visit %s for more details' % blocked_iframe
+ raise ExtractorError(msg, expected=True)
+
return (content, urlh)
def _download_webpage(self, url_or_request, video_id, note=None, errnote=None, fatal=True):