README

LiteSpeed Plugin for Craft CMS

A very simple integration with the LiteSpeed web server and LSCache for Craft CMS. The entire LSCache is cleared any time an entry is saved. For a more sophisticated caching solution, try Blitz.

Installation

To install the plugin, search for “LiteSpeed” in the Craft Plugin Store, or install manually using composer.

composer require dyerc/craft-litespeed

Update your .htaccess to include a block enabling caching for everywhere except the admin area. The following example will cache all pages for 8 hours (28800 seconds) with the exception of any /admin URLs:

########## Begin - Litespeed cache
<IfModule LiteSpeed>
  RewriteEngine On
  RewriteCond %{REQUEST_METHOD} ^HEAD|GET$
  RewriteCond %{ORG_REQ_URI} !/admin
  RewriteCond %{ORG_REQ_URI} !/index.php/admin
  RewriteRule .* - [E=Cache-Control:max-age=28800]
</IfModule>
########## End - Litespeed cache

If you would like to exclude some other page from cache (let's say, /mypage.php), simply add the following line to the existing rewrite conditions:

RewriteCond %{ORG_REQ_URI} !/mypage.php

If you want to cache your site for only 4 hours, you can change the max-age. So, it would be:

RewriteRule .* - [E=Cache-Control:max-age=14400]

LSCache Check Tool

There's a simple way to see if a URL is cached by LiteSpeed: the LSCache Check Tool. Enter the URL you wish to check, and the tool will respond with an easy-to-read Yes or No result.

CSRF Helpers

Any CSRF values (for example {{ csrfInput() }}) will be cached by LiteSpeed, preventing forms from working correctly. There are two built-in options for working around this situation:

Automatically inject a script into every page which looks for CSRF inputs, fetches a valid value asynchronously after page load and substitutes in the new value. Configure the plugin to do this be creating a config/litespeed.php file containing:

<?php

return [
  "production" => [
    // Or '*' for all environments
    "injectCsrf" => true,
  ],
];

On a manual basis by calling the following twig function.

{{ craft.litespeed.injectCsrf() }}

A JavaScript variable window.LiteSpeed will also become available containing the following which can be used by any JavaScript within your site which needs to locate a CSRF param.

> window.LiteSpeed
{
  tokenName: "CRAFT_CSRF_TOKEN",
  tokenValue: "..."
}

Requirements

This plugin requires Craft CMS 4.0.0 or later.

Created by Chris Dyer.