On 05/06/17 23:54, LIU Yaning wrote:
Dear All,
I would like to cache the .m3u8 file to be able to provide offline
caching service by Squid. The played HLS video streaming is the link
as below:
http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/0150_vod.m3u8
<http://qthttp.apple.com.edgesuite.net/1010qwoeiuryfg/0150_vod.m3u8>
However, the .m3u8 file is not be cached probably because it is
mentioned as a no-cache, no-store, max-age=0 in the "Cache-Control" in
the HTTP header.
Nope. Only the CC:no-store is preventing caching. The other headers
simply put boundaries on what is to be done with the content in the
cache. In particular the "no-cache", max-age=0 and Expires values mean
it has to be revalidated (REFRESH in your access.log) before any future
uses - probably because of that Set-Cookie needing to be changed for
different end-users.
HTTP/1.1 200 OK
Server: Apache
ETag: "1d7168b4f49e75f76f3182f24bf075f6:1299516751"
Last-Modified: Mon, 07 Mar 2011 16:52:31 GMT
Expires: Fri, 02 Jun 2017 14:26:52 GMT
Cache-Control: max-age=0, no-cache, no-store
Pragma: no-cache
Date: Fri, 02 Jun 2017 14:26:52 GMT
Content-Length: 16046
Set-Cookie: AKID=77F9F1316ECCE780566608C5E514DE0A;expires=Fri, 26 Aug
2016 00:01:00 GMT; path=/; domain=qthttp.apple.com.edgesuite.net
<http://qthttp.apple.com.edgesuite.net/>
Content-Type: application/x-mpegURL
Access-Control-Allow-Origin: *
I added a new rule for .m3u8 file in squid.conf, however, it is still
not working.
refresh_pattern -i \.(ts|m3u8)$ 120 90% 1000 override-expire
override-lastmod ignore-no-cache ignore-no-store
Does anyone know how to allow Squid caching the .m3u8 file? Thanks a
lot in advance.
What makes you think it is not caching? The ignore-no-store alone should
be sufficient to allow current Squid versions to cache that object. You
could perhapse add "store-stale" option on that config line. Which
should make Squid cache object containing an Expires header with current
or past values. refresh_pattern settings do not affect that cacheable vs
non-cacheable decision. The no-cache header tells Squid the object needs
revalidating before every use. However, be aware the tool at redbot.org
tells me that this URL is badly broken in how it is using the ETag and
Vary headers - in a way which can break the revalidation when these
things are cached. Some of your clients may see very broken behaviour
accessing this object unless you follow the no-store requirement or the
server stops its broken ETag behaviour. PS. if you are using a Squid
version much older than 3.5.24 I recommend an upgrade. With an urgency
increasing the older your Squid is. Amos
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