WeAmp Cache Control for ModPageSpeed

This plugin is the control panel for ModPageSpeed — a web server optimization module for nginx and Apache. ModPageSpeed must be installed and running on your server for this plugin to function. It is not a standalone caching plugin.

The plugin does three things:

1. Enables full-page caching — adds Cache-Control: public, max-age=N to anonymous page responses (WordPress does not send this by default), with explicit bypasses for logged-in users, WooCommerce cart/checkout/account pages, search, feeds, and 404s.
2. Keeps the cache fresh — calls the ModPageSpeed purge API when you publish, update, or delete content, when comments change, when stock levels change, and when terms or theme settings change.
3. Gives you control in WP Admin and WP-CLI — per-post-type TTLs, cookie bypass list, excluded URL patterns, a first-run setup wizard, and wp pagespeed flush|status|test-connection commands.

Works with both ModPageSpeed product lines (auto-detected), with one important difference:

• ModPageSpeed 2.0 caches full HTML pages itself — the plugin’s headers and purge calls drive the module’s page cache directly.
• mod_pagespeed / ngx_pagespeed 1.1 does not cache HTML (it is a streaming rewriter; its in-place optimization caches only images, CSS, and JS). Full-page caching on 1.1 requires an external cache layer in front (nginx proxy_cache, Varnish, or a CDN) plus ModifyCachingHeaders off or DownstreamCachePurgeLocationPrefix — with 1.1’s default ModifyCachingHeaders on, the module replaces this plugin’s Cache-Control header on rewritten HTML. On 1.1, the plugin’s purge calls evict optimized sub-resources and metadata, not HTML pages.

Server requirements

• ModPageSpeed 1.1 (v1.15.0+r3 or later) or ModPageSpeed 2.0 (v2.0.0 or later) installed on your web server.
• For 2.0: the worker admin API enabled (--api-port).
• For full logged-in-user correctness an nginx cookie-bypass map block is required — the setup wizard provides a copy-paste snippet and verifies it.

WP-CLI

• wp pagespeed flush [--url=<url>] — purge the home page (and posts page), or one specific URL on this site.
• wp pagespeed status — detected product, version, license tier, purge prerequisites, and last-purge status.
• wp pagespeed test-connection — verify the admin API is reachable and correctly configured (read-only, never purges).

License

This plugin is free software, licensed under the GNU General Public License v2.0 or later. The full GPL-2.0 license text is bundled with the plugin in the LICENSE file.

Third Party Services

This plugin makes HTTP requests to the operator-configured ModPageSpeed admin API URL. Data sent includes page URLs (for cache purging) and an API key (for authentication). No data is sent to We-Amp or any third party.