Question
Mod_pagespeed installed but filters not running on page. No pagespeed headers present
- Posted on September 28, 2016
- Ubuntu 16.04ApacheLAMP Stack
Asked by craigward
I’ve just started a standard LAMP DigitalOcean droplet and installed Google Pagespeed. The package is installed and listed in /etc/apache2/mods-enabled/
I have added the following items to the pagespeed.conf
ModPagespeedEnableFilters prioritize_critical_css
ModPagespeedEnableFilters lazyload_images,inline_preview_images,insert_image_dimensions
ModPagespeedEnableFilters resize_mobile_images,insert_image_dimensions
Which I have used on previous projects. For some reason none of these filters are being run. Inspecting the headers being passed from the server show no pagespeed headers.
I don’t seem to be running across any errors anywhere and I am stuck as to what to look for next.
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It turns out it was the CMS I am using. It uses the register_shutdown_function from php which with a call back introduces no-pragma and breaks pagespeed
After enabling the mod with
a2enmod pagespeeddid you ensure that you restarted the apache process withservice apache2 restart?In some instances mod_expires is also required in order to use mod_pagespeed. It can be enabled with
a2enmod expires; service apache2 restart