XF 2.0 Why attachments are un-cachable?

[karnaf]

It looks like all attachments on the forum have the following headers:

Cache-Control: private, no-cache, max-age=0 Expires: Thu, 19 Nov 1981 08:52:00 GMT

They make sure the attachments dont get cached on a CDN or the user's browser.

Why? Is there way to fix this through Xenforo settings or I need to overwrite these headers using Nginx?

 

[Mike]

Attachments are permission controlled and thus CDN caching is not generally appropriate. These are the standard headers output by all "normal" XF pages (which is set whenever a session is started).

 

[karnaf]

Well in my case they are public for everyone. So I guess the only solution is to overwrite the headers using nginx.

Thanks

 

[Optic]

I would proceed with caution, in case any of your members use attachments inside private conversations (e.g share photos etc.)

 

[karnaf]

Well even if they do then the only way to see them would be to guess the URL which is impossible.
My forum is attachment heavy, thousands of files are shared. So a CDN and good caching are required for good performance.

 

[ShinLim]

Well even if they do then the only way to see them would be to guess the URL which is impossible.
My forum is attachment heavy, thousands of files are shared. So a CDN and good caching are required for good performance.

Yes indeed, it's been a long time since you created this thread, so how's your problem, is it solved yet ?
If you have thousands of files are shared then it must use alot of bandwidth, am i correct ? Then how to solve it

 

[karnaf]

I overwrite the headers of attachments using Nginx to make them cacheable and then I use a CDN to serve them and offload the traffic there.

 

[delicatebobster]

I think this can help you - https://xfrocks.com/resources/bd-attachment-store-for-xenforo-2-0.35/ to serve attachments over cdn

 

[ShinLim]

I overwrite the headers of attachments using Nginx to make them cacheable and then I use a CDN to serve them and offload the traffic there.

Can you cache video attachment ?

 

[Chromaniac]

I overwrite the headers of attachments using Nginx to make them cacheable

can you provide details on this! thanks.

 

[Kevin]

can you provide details on this! thanks.

If you haven't found a solution, here's something that may help...

Unmaintained - Image Attachment Cache Control

Image Attachment Cache Control for XenForo 2.1.10.2+ Description This add-on allows controlling image attachments cache headers. Requirements PHP 7.3+ Options Attachments NameDescription Image attachment cache controlConfiguration to...

xenforo.com

 

[Chromaniac]

Using it already

 

[Seeker-Smith]

Attachments are permission controlled and thus CDN caching is not generally appropriate. These are the standard headers output by all "normal" XF pages (which is set whenever a session is started).

Mike what about thumbs? Do they get cached?