Extending browser cache

Extending browser cache

by Benjamin Bøndergaard -
Number of replies: 3

Hello moodle
I am trying to figure out how to reduce server load by extending browser caching.
Right now many of the image files only have a cache lifetime of 1 hour, which is almost nothing compared to the standard of 1 year.
This 1 hour is hard-coded into the core because the images come from pluginfile.php/xxxxx/course/overviewfiles/
Is there any way to change this without editing core core?
I have used htaccess to change headers, but found that moodle overrides these headers.

Running moodle 3.7.1

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In reply to Benjamin Bøndergaard

Re: Extending browser cache

by Howard Miller -
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Welcome to Moodle... it would be really good if you changed your profile to show your *real* name. We like to know who we're speaking to wink
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In reply to Benjamin Bøndergaard

Re: Extending browser cache

by Tim Hunt -
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If you set the files to cache for 1 year, and then want to change the image, you can't reliably.

Moodle lets users change the image through the UI.

Hence, 1 hour seems like a good compromise.

If you want more sophisticated caching, put a CDN in front of your Moodle site.
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In reply to Tim Hunt

Ang: Re: Extending browser cache

by Benjamin Bøndergaard -
I see. I initially thought the url changed when you uploaded a new image (with the same filename), since I saw a plugin do that for one of their images.
But upon further investigation I can see that this is not true for course images.

Wouldn't it be better if the url changed (timestamp) every time a new image (with the same name) was uploaded to moodle, just like js and css gets a timestamp in their url?

But as of now I will go with your suggestion of extending cache on a CDN level. smiler
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