chore: add apache rewriter for webp and avif

Author: tijmenbruggeman

src/class-tiny-apache-rewrite.php

@@ -0,0 +1,162 @@
+<?php
+/*
+* Tiny Compress Images - WordPress plugin.
+* Copyright (C) 2015-2018 Tinify B.V.
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License as published by the Free
+* Software Foundation; either version 2 of the License, or (at your option)
+* any later version.
+*
+* This program is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+* more details.
+*
+* You should have received a copy of the GNU General Public License along
+* with this program; if not, write to the Free Software Foundation, Inc., 51
+* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\n*/
+
+class Tiny_Apache_Rewrite extends Tiny_WP_Base
+{
+
+	const MARKER = 'tinify_modern_images';
+
+	/**
+	 * Generate .htaccess rewrite rules for serving WebP and AVIF images.
+	 *
+	 * @return string The .htaccess rules
+	 */
+	public static function get_rewrite_rules()
+	{
+		$rules = array(
+			'<IfModule mod_rewrite.c>',
+			'RewriteEngine On',
+			'RewriteOptions Inherit',
+		);
+
+		$rules = array_merge($rules, self::get_avif_rules());
+		$rules = array_merge($rules, self::get_webp_rules());
+
+		$rules[] = '</IfModule>';
+
+		$rules[] = '<IfModule mod_headers.c>';
+		$rules[] = 'Header append Vary Accept';
+		$rules[] = '<FilesMatch "\\.(webp|avif)$">';
+		$rules[] = 'Header set Cache-Control "max-age=31536000, public"';
+		$rules[] = '</FilesMatch>';
+		$rules[] = '</IfModule>';
+
+		$rules[] = '<IfModule mod_mime.c>';
+		$rules[] = 'AddType image/webp .webp';
+		$rules[] = 'AddType image/avif .avif';
+		$rules[] = '</IfModule>';
+
+		return implode("\n", $rules);
+	}
+
+	/**
+	 * Generate AVIF rewrite rules.
+	 *
+	 * @return array[] AVIF rewrite rules
+	 */
+	private static function get_avif_rules()
+	{
+		$rules = array();
+
+		// AVIF rule 1: Try file with original extension appended (image.jpg.avif)
+		$rules[] = 'RewriteCond %{HTTP_ACCEPT} image/avif';
+		$rules[] = 'RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI}.avif -f';
+		$rules[] = 'RewriteRule ^(.+)$ $1.avif [T=image/avif,L]';
+
+		// AVIF rule 2: Try file with extension replaced (image.avif)
+		$rules[] = 'RewriteCond %{HTTP_ACCEPT} image/avif';
+		$rules[] = 'RewriteCond %{REQUEST_URI} ^(.+)\\.(?:jpe?g|png|gif)$';
+		$rules[] = 'RewriteCond %{DOCUMENT_ROOT}/%1.avif -f';
+		$rules[] = 'RewriteRule (.+)\\.(?:jpe?g|png|gif)$ $1.avif [T=image/avif,L]';
+
+		return $rules;
+	}
+
+	/**
+	 * Generate WebP rewrite rules.
+	 *
+	 * @return array[] WebP rewrite rules
+	 */
+	private static function get_webp_rules()
+	{
+		$rules = array();
+
+		// WebP rule 1: Try file with original extension appended (image.jpg.webp)
+		// Check for Chrome browser or explicit Accept header
+		$rules[] = 'RewriteCond %{HTTP_ACCEPT} image/webp [OR]';
+		$rules[] = 'RewriteCond %{HTTP_USER_AGENT} Chrome';
+		$rules[] = 'RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI}.webp -f';
+		$rules[] = 'RewriteRule ^(.+)$ $1.webp [T=image/webp,L]';
+
+		// WebP rule 2: Try file with extension replaced (image.webp)
+		$rules[] = 'RewriteCond %{HTTP_ACCEPT} image/webp [OR]';
+		$rules[] = 'RewriteCond %{HTTP_USER_AGENT} Chrome';
+		$rules[] = 'RewriteCond %{REQUEST_URI} ^(.+)\\.(?:jpe?g|png|gif)$';
+		$rules[] = 'RewriteCond %{DOCUMENT_ROOT}/%1.webp -f';
+		$rules[] = 'RewriteRule (.+)\\.(?:jpe?g|png|gif)$ $1.webp [T=image/webp,L]';
+
+		return $rules;
+	}
+
+	/**
+	 * Install rewrite rules to .htaccess files.
+	 *
+	 * @return bool True on success, false otherwise
+	 */
+	public static function install()
+	{
+		if (! function_exists('insert_with_markers')) {
+			require_once ABSPATH . 'wp-admin/includes/misc.php';
+		}
+
+		$rules = self::get_rewrite_rules();
+
+		// Write to uploads directory
+		$upload_dir = wp_upload_dir();
+		if (isset($upload_dir['basedir']) && is_writable($upload_dir['basedir'])) {
+			$htaccess_file = $upload_dir['basedir'] . '/.htaccess';
+			insert_with_markers($htaccess_file, self::MARKER, $rules);
+		}
+
+		// Write to root directory
+		if (is_writable(get_home_path())) {
+			$htaccess_file = get_home_path() . '.htaccess';
+			insert_with_markers($htaccess_file, self::MARKER, $rules);
+		}
+
+		return true;
+	}
+
+	/**
+	 * Remove rewrite rules from .htaccess files.
+	 *
+	 * @return bool True on success, false otherwise
+	 */
+	public static function uninstall()
+	{
+		if (! function_exists('insert_with_markers')) {
+			require_once ABSPATH . 'wp-admin/includes/misc.php';
+		}
+
+		// Remove from uploads directory
+		$upload_dir = wp_upload_dir();
+		if (isset($upload_dir['basedir']) && file_exists($upload_dir['basedir'] . '/.htaccess')) {
+			$htaccess_file = $upload_dir['basedir'] . '/.htaccess';
+			insert_with_markers($htaccess_file, self::MARKER, '');
+		}
+
+		// Remove from root directory
+		if (file_exists(get_home_path() . '.htaccess')) {
+			$htaccess_file = get_home_path() . '.htaccess';
+			insert_with_markers($htaccess_file, self::MARKER, '');
+		}
+
+		return true;
+	}
+}