CDN Enabler – WordPress CDN Plugin

Version Description

First major release
Fixed warnings

Release Info

Developer	keycdn
Plugin	CDN Enabler – WordPress CDN Plugin
Version	1.0.1
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Version 1.0.1

Files changed (5) hide show

cdn-enabler.php +86 -0
inc/cdn_enabler.class.php +238 -0
inc/cdn_enabler_rewriter.class.php +140 -0
inc/cdn_enabler_settings.class.php +195 -0
readme.txt +52 -0

cdn-enabler.php ADDED Viewed

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1	+ <?php
2	+ /*
3	+ Plugin Name: CDN Enabler
4	+ Text Domain: cdn
5	+ Description: Simply integrate a Content Delivery Network (CDN) into your WordPress site.
6	+ Author: KeyCDN
7	+ Author URI: https://www.keycdn.com
8	+ License: GPLv2 or later
9	+ Version: 1.0.1
10	+ */
11	+
12	+ /*
13	+ Copyright (C) 2012-2015 KeyCDN
14	+
15	+ This program is free software; you can redistribute it and/or modify
16	+ it under the terms of the GNU General Public License as published by
17	+ the Free Software Foundation; either version 2 of the License, or
18	+ (at your option) any later version.
19	+
20	+ This program is distributed in the hope that it will be useful,
21	+ but WITHOUT ANY WARRANTY; without even the implied warranty of
22	+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23	+ GNU General Public License for more details.
24	+
25	+ You should have received a copy of the GNU General Public License along
26	+ with this program; if not, write to the Free Software Foundation, Inc.,
27	+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28	+ */
29	+
30	+
31	+ /* Check & Quit */
32	+ defined('ABSPATH') OR exit;
33	+
34	+
35	+ /* constants */
36	+ define('CDN_ENABLER_FILE', __FILE__);
37	+ define('CDN_ENABLER_DIR', dirname(__FILE__));
38	+ define('CDN_ENABLER_BASE', plugin_basename(__FILE__));
39	+ define('CDN_ENABLER_MIN_WP', '3.8');
40	+
41	+
42	+ /* loader */
43	+ add_action(
44	+ 'plugins_loaded',
45	+ array(
46	+ 'CDN_Enabler',
47	+ 'instance'
48	+ )
49	+ );
50	+
51	+
52	+ /* uninstall */
53	+ register_uninstall_hook(
54	+ __FILE__,
55	+ array(
56	+ 'CDN_Enabler',
57	+ 'handle_uninstall_hook'
58	+ )
59	+ );
60	+
61	+
62	+ /* activation */
63	+ register_activation_hook(
64	+ __FILE__,
65	+ array(
66	+ 'CDN_Enabler',
67	+ 'handle_activation_hook'
68	+ )
69	+ );
70	+
71	+
72	+ /* autoload init */
73	+ spl_autoload_register('CDN_ENABLER_autoload');
74	+
75	+ /* autoload funktion */
76	+ function CDN_ENABLER_autoload($class) {
77	+ if ( in_array($class, array('CDN_Enabler', 'CDN_Enabler_Rewriter', 'CDN_Enabler_Settings')) ) {
78	+ require_once(
79	+ sprintf(
80	+ '%s/inc/%s.class.php',
81	+ CDN_ENABLER_DIR,
82	+ strtolower($class)
83	+ )
84	+ );
85	+ }
86	+ }

inc/cdn_enabler.class.php ADDED Viewed

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1	+ <?php
2	+
3	+ /**
4	+ * CDN_Enabler
5	+ *
6	+ * @since 0.0.1
7	+ */
8	+
9	+ class CDN_Enabler
10	+ {
11	+
12	+
13	+ /**
14	+ * pseudo-constructor
15	+ *
16	+ * @since 0.0.1
17	+ * @change 0.0.1
18	+ */
19	+
20	+ public static function instance()
21	+ {
22	+ new self();
23	+ }
24	+
25	+
26	+ /**
27	+ * constructor
28	+ *
29	+ * @since 0.0.1
30	+ * @change 0.0.1
31	+ */
32	+
33	+ public function __construct()
34	+ {
35	+
36	+ /* CDN rewriter hook */
37	+ add_action(
38	+ 'template_redirect',
39	+ array(
40	+ __CLASS__,
41	+ 'handle_rewrite_hook'
42	+ )
43	+ );
44	+
45	+ /* Filter */
46	+ if ( (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) OR (defined('DOING_CRON') && DOING_CRON) OR (defined('DOING_AJAX') && DOING_AJAX) OR (defined('XMLRPC_REQUEST') && XMLRPC_REQUEST) ) {
47	+ //return;
48	+ }
49	+
50	+ /* BE only */
51	+ if ( ! is_admin() ) {
52	+ //return;
53	+ }
54	+
55	+ /* Hooks */
56	+ add_action(
57	+ 'admin_init',
58	+ array(
59	+ 'CDN_Enabler_Settings',
60	+ 'register_settings'
61	+ )
62	+ );
63	+ add_action(
64	+ 'admin_menu',
65	+ array(
66	+ 'CDN_Enabler_Settings',
67	+ 'add_settings_page'
68	+ )
69	+ );
70	+ add_filter(
71	+ 'plugin_action_links_' .CDN_ENABLER_BASE,
72	+ array(
73	+ __CLASS__,
74	+ 'add_action_link'
75	+ )
76	+ );
77	+
78	+ /* admin notices */
79	+ add_action(
80	+ 'all_admin_notices',
81	+ array(
82	+ __CLASS__,
83	+ 'cdn_enabler_requirements_check'
84	+ )
85	+ );
86	+
87	+ }
88	+
89	+
90	+
91	+ /**
92	+ * add action links
93	+ *
94	+ * @since 0.0.1
95	+ * @change 0.0.1
96	+ *
97	+ * @param array $data alreay existing links
98	+ * @return array $data extended array with links
99	+ */
100	+
101	+ public static function add_action_link($data)
102	+ {
103	+ // check permission
104	+ if ( ! current_user_can('manage_options') ) {
105	+ return $data;
106	+ }
107	+
108	+ return array_merge(
109	+ $data,
110	+ array(
111	+ sprintf(
112	+ '<a href="%s">%s</a>',
113	+ add_query_arg(
114	+ array(
115	+ 'page' => 'cdn_enabler'
116	+ ),
117	+ admin_url('options-general.php')
118	+ ),
119	+ __("Settings")
120	+ )
121	+ )
122	+ );
123	+ }
124	+
125	+
126	+ /**
127	+ * run uninstall hook
128	+ *
129	+ * @since 0.0.1
130	+ * @change 0.0.1
131	+ */
132	+
133	+ public static function handle_uninstall_hook()
134	+ {
135	+ delete_option('cdn_enabler');
136	+ }
137	+
138	+
139	+ /**
140	+ * run activation hook
141	+ *
142	+ * @since 0.0.1
143	+ * @change 0.0.1
144	+ */
145	+
146	+ public static function handle_activation_hook() {
147	+ add_option(
148	+ 'cdn_enabler',
149	+ array(
150	+ 'url' => get_option('siteurl'),
151	+ 'dirs' => 'wp-content,wp-includes',
152	+ 'excludes' => '.php',
153	+ 'relative' => '1',
154	+ 'https' => ''
155	+ )
156	+ );
157	+ }
158	+
159	+
160	+ /**
161	+ * check plugin requirements
162	+ *
163	+ * @since 0.0.1
164	+ * @change 0.0.1
165	+ */
166	+
167	+ public static function cdn_enabler_requirements_check() {
168	+ // WordPress version check
169	+ if ( version_compare($GLOBALS['wp_version'], CDN_ENABLER_MIN_WP.'alpha', '<') ) {
170	+ show_message(
171	+ sprintf(
172	+ '<div class="error"><p>%s</p></div>',
173	+ sprintf(
174	+ __("CDN Enabler is optimized for WordPress %s. Please disable the plugin or upgrade your WordPress installation (recommended).", "cdn"),
175	+ CDN_ENABLER_MIN_WP
176	+ )
177	+ )
178	+ );
179	+ }
180	+ }
181	+
182	+
183	+ /**
184	+ * return plugin options
185	+ *
186	+ * @since 0.0.1
187	+ * @change 0.0.1
188	+ *
189	+ * @return array $diff data pairs
190	+ */
191	+
192	+ public static function get_options()
193	+ {
194	+ return wp_parse_args(
195	+ get_option('cdn_enabler'),
196	+ array(
197	+ 'url' => get_option('siteurl'),
198	+ 'dirs' => 'wp-content,wp-includes',
199	+ 'excludes' => '.php',
200	+ 'relative' => 1,
201	+ 'https' => 0
202	+ )
203	+ );
204	+ }
205	+
206	+
207	+ /**
208	+ * run rewrite hook
209	+ *
210	+ * @since 0.0.1
211	+ * @change 0.0.1
212	+ */
213	+
214	+ public static function handle_rewrite_hook()
215	+ {
216	+ $options = self::get_options();
217	+
218	+ // check if origin equals cdn url
219	+ if (get_option('siteurl') == $options['url']) {
220	+ return;
221	+ }
222	+
223	+ $excludes = array_map('trim', explode(',', $options['excludes']));
224	+
225	+ $rewriter = new CDN_Enabler_Rewriter(
226	+ get_option('siteurl'),
227	+ $options['url'],
228	+ $options['dirs'],
229	+ $excludes,
230	+ $options['relative'],
231	+ $options['https']
232	+ );
233	+ ob_start(
234	+ array(&$rewriter, 'rewrite')
235	+ );
236	+ }
237	+
238	+ }

inc/cdn_enabler_rewriter.class.php ADDED Viewed

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1	+ <?php
2	+
3	+ /**
4	+ * CDN_Enabler_Rewriter
5	+ *
6	+ * @since 0.0.1
7	+ */
8	+
9	+ class CDN_Enabler_Rewriter
10	+ {
11	+ var $blog_url = null; // origin URL
12	+ var $cdn_url = null; // CDN URL
13	+
14	+ var $dirs = null; // included directories
15	+ var $excludes = array(); // excluded extensions
16	+ var $relative = false; // use CDN on relative paths
17	+ var $https = false; // use CDN on HTTPS
18	+
19	+ /**
20	+ * constructor
21	+ *
22	+ * @since 0.0.1
23	+ * @change 0.0.1
24	+ */
25	+
26	+ function __construct($blog_url, $cdn_url, $dirs, array $excludes, $relative, $https) {
27	+ $this->blog_url = $blog_url;
28	+ $this->cdn_url = $cdn_url;
29	+ $this->dirs = $dirs;
30	+ $this->excludes = $excludes;
31	+ $this->relative = $relative;
32	+ $this->https = $https;
33	+ }
34	+
35	+
36	+ /**
37	+ * excludes assets that should not rewritten
38	+ *
39	+ * @since 0.0.1
40	+ * @change 0.0.1
41	+ *
42	+ * @param string $asset current asset
43	+ * @return boolean true if need to be excluded
44	+ */
45	+
46	+ protected function exclude_asset(&$asset) {
47	+ foreach ($this->excludes as $exclude) {
48	+ if (!!$exclude && stristr($asset, $exclude) != false) {
49	+ return true;
50	+ }
51	+ }
52	+ return false;
53	+ }
54	+
55	+
56	+ /**
57	+ * rewrite url
58	+ *
59	+ * @since 0.0.1
60	+ * @change 0.0.1
61	+ *
62	+ * @param string $asset current asset
63	+ * @return string updated url if not excluded
64	+ */
65	+
66	+ protected function rewrite_url($asset) {
67	+ if ($this->exclude_asset($asset[0])) {
68	+ return $asset[0];
69	+ }
70	+ $blog_url = $this->blog_url;
71	+
72	+ // check if not a relative path
73	+ if (!$this->relative \|\| strstr($asset[0], $blog_url)) {
74	+ return str_replace($blog_url, $this->cdn_url, $asset[0]);
75	+ }
76	+
77	+ return $this->cdn_url . $asset[0];
78	+ }
79	+
80	+
81	+ /**
82	+ * get directory scope
83	+ *
84	+ * @since 0.0.1
85	+ * @change 0.0.1
86	+ *
87	+ * @return string directory scope
88	+ */
89	+
90	+ protected function get_dir_scope() {
91	+ $input = explode(',', $this->dirs);
92	+
93	+ // default
94	+ if ($this->dirs == '' \|\| count($input) < 1) {
95	+ return 'wp\-content\|wp\-includes';
96	+ }
97	+
98	+ return implode('\|', array_map('quotemeta', array_map('trim', $input)));
99	+ }
100	+
101	+
102	+ /**
103	+ * rewrite url
104	+ *
105	+ * @since 0.0.1
106	+ * @change 1.0.1
107	+ *
108	+ * @param string $html current raw HTML doc
109	+ * @return string updated HTML doc with CDN links
110	+ */
111	+
112	+ public function rewrite($html) {
113	+ // check if HTTPS and use CDN over HTTPS enabled
114	+ if (!$this->https && isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == 'on') {
115	+ return $html;
116	+ }
117	+
118	+ // get dir scope in regex format
119	+ $dirs = $this->get_dir_scope();
120	+ $blog_url = quotemeta($this->blog_url);
121	+
122	+ // regex rule start
123	+ $regex_rule = '#(?<=[(\"\'])';
124	+
125	+ // check if relative paths
126	+ if ($this->relative) {
127	+ $regex_rule .= '(?:'.$blog_url.')?';
128	+ } else {
129	+ $regex_rule .= $blog_url;
130	+ }
131	+
132	+ // regex rule end
133	+ $regex_rule .= '/(?:((?:'.$dirs.')[^\"\')]+)\|([^/\"\']+\.[^/\"\')]+))(?=[\"\')])#';
134	+
135	+ // call the cdn rewriter callback
136	+ $cdn_html = preg_replace_callback($regex_rule, array(&$this, 'rewrite_url'), $html);
137	+
138	+ return $cdn_html;
139	+ }
140	+ }

inc/cdn_enabler_settings.class.php ADDED Viewed

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1	+ <?php
2	+
3	+ /**
4	+ * CDN_Enabler_Settings
5	+ *
6	+ * @since 0.0.1
7	+ */
8	+
9	+ class CDN_Enabler_Settings
10	+ {
11	+
12	+
13	+ /**
14	+ * register settings
15	+ *
16	+ * @since 0.0.1
17	+ * @change 0.0.1
18	+ */
19	+
20	+ public static function register_settings()
21	+ {
22	+ register_setting(
23	+ 'cdn_enabler',
24	+ 'cdn_enabler',
25	+ array(
26	+ __CLASS__,
27	+ 'validate_settings'
28	+ )
29	+ );
30	+ }
31	+
32	+
33	+ /**
34	+ * validation of settings
35	+ *
36	+ * @since 0.0.1
37	+ * @change 0.0.1
38	+ *
39	+ * @param array $data array with form data
40	+ * @return array array with validated values
41	+ */
42	+
43	+ public static function validate_settings($data)
44	+ {
45	+ return array(
46	+ 'url' => esc_url($data['url']),
47	+ 'dirs' => esc_attr($data['dirs']),
48	+ 'excludes' => esc_attr($data['excludes']),
49	+ 'relative' => (int)($data['relative']),
50	+ 'https' => (int)($data['https'])
51	+ );
52	+ }
53	+
54	+
55	+ /**
56	+ * add settings page
57	+ *
58	+ * @since 0.0.1
59	+ * @change 0.0.1
60	+ */
61	+
62	+ public static function add_settings_page()
63	+ {
64	+ $page = add_options_page(
65	+ 'CDN Enabler',
66	+ 'CDN Enabler',
67	+ 'manage_options',
68	+ 'cdn_enabler',
69	+ array(
70	+ __CLASS__,
71	+ 'settings_page'
72	+ )
73	+ );
74	+ }
75	+
76	+
77	+ /**
78	+ * settings page
79	+ *
80	+ * @since 0.0.1
81	+ * @change 0.0.1
82	+ *
83	+ * @return void
84	+ */
85	+
86	+ public static function settings_page()
87	+ { ?>
88	+ <div class="wrap">
89	+ <h2>
90	+ <?php _e("CDN Enabler Settings", "cdn"); ?>
91	+ </h2>
92	+
93	+ <form method="post" action="options.php">
94	+ <?php settings_fields('cdn_enabler') ?>
95	+
96	+ <?php $options = CDN_Enabler::get_options() ?>
97	+
98	+ <table class="form-table">
99	+
100	+ <tr valign="top">
101	+ <th scope="row">
102	+ <?php _e("CDN URL", "cdn"); ?>
103	+ </th>
104	+ <td>
105	+ <fieldset>
106	+ <label for="cdn_enabler_url">
107	+ <input type="text" name="cdn_enabler[url]" id="cdn_enabler_url" value="<?php echo $options['url']; ?>" size="64" class="regular-text code" />
108	+ <?php _e("", "cdn"); ?>
109	+ </label>
110	+
111	+ <p class="description">
112	+ <?php _e("Enter the CDN URL without trailing", "cdn"); ?> <code>/</code>
113	+ </p>
114	+ </fieldset>
115	+ </td>
116	+ </tr>
117	+
118	+ <tr valign="top">
119	+ <th scope="row">
120	+ <?php _e("Included Directories", "cdn"); ?>
121	+ </th>
122	+ <td>
123	+ <fieldset>
124	+ <label for="cdn_enabler_dirs">
125	+ <input type="text" name="cdn_enabler[dirs]" id="cdn_enabler_dirs" value="<?php echo $options['dirs']; ?>" size="64" class="regular-text code" />
126	+ <?php _e("Default: <code>wp-content,wp-includes</code>", "cdn"); ?>
127	+ </label>
128	+
129	+ <p class="description">
130	+ <?php _e("Assets in these directories will be pointed to the CDN URL. Enter the directories separated by", "cdn"); ?> <code>,</code>
131	+ </p>
132	+ </fieldset>
133	+ </td>
134	+ </tr>
135	+
136	+ <tr valign="top">
137	+ <th scope="row">
138	+ <?php _e("Excluded Extensions", "cdn"); ?>
139	+ </th>
140	+ <td>
141	+ <fieldset>
142	+ <label for="cdn_enabler_excludes">
143	+ <input type="text" name="cdn_enabler[excludes]" id="cdn_enabler_excludes" value="<?php echo $options['excludes']; ?>" size="64" class="regular-text code" />
144	+ <?php _e("Default: <code>.php</code>", "cdn"); ?>
145	+ </label>
146	+
147	+ <p class="description">
148	+ <?php _e("Enter the exclusions separated by", "cdn"); ?> <code>,</code>
149	+ </p>
150	+ </fieldset>
151	+ </td>
152	+ </tr>
153	+
154	+ <tr valign="top">
155	+ <th scope="row">
156	+ <?php _e("Relative Path", "cdn"); ?>
157	+ </th>
158	+ <td>
159	+ <fieldset>
160	+ <label for="cdn_enabler_relative">
161	+ <input type="checkbox" name="cdn_enabler[relative]" id="cdn_enabler_relative" value="1" <?php checked(1, $options['relative']) ?> />
162	+ <?php _e("Enable CDN for relative paths (default: enabled).", "cdn"); ?>
163	+ </label>
164	+
165	+ <p class="description">
166	+ <?php _e("", "cdn"); ?>
167	+ </p>
168	+ </fieldset>
169	+ </td>
170	+ </tr>
171	+
172	+ <tr valign="top">
173	+ <th scope="row">
174	+ <?php _e("CDN HTTPS", "cdn"); ?>
175	+ </th>
176	+ <td>
177	+ <fieldset>
178	+ <label for="cdn_enabler_https">
179	+ <input type="checkbox" name="cdn_enabler[https]" id="cdn_enabler_https" value="1" <?php checked(1, $options['https']) ?> />
180	+ <?php _e("Enable CDN for HTTPS connections (default: disabled).", "cdn"); ?>
181	+ </label>
182	+
183	+ <p class="description">
184	+ <?php _e("", "cdn"); ?>
185	+ </p>
186	+ </fieldset>
187	+ </td>
188	+ </tr>
189	+ </table>
190	+
191	+ <?php submit_button() ?>
192	+ </form>
193	+ </div><?php
194	+ }
195	+ }

readme.txt ADDED Viewed

	@@ -0,0 +1,52 @@


1	+ === CDN Enabler - WordPress CDN Plugin ===
2	+ Contributors: keycdn
3	+ Tags: cdn, content delivery network, content distribution network
4	+ Requires at least: 3.8
5	+ Tested up to: 4.2.3
6	+ Stable tag: trunk
7	+ License: GPLv2 or later
8	+ License URI: http://www.gnu.org/licenses/gpl-2.0.html
9	+
10	+
11	+
12	+ Enable CDN URLs for your static assets such as images, CSS or JavaScript files.
13	+
14	+
15	+
16	+ == Description ==
17	+
18	+ A content delivery network (CDN) is a network of distributed edge servers, which accelerate your content around the globe. The main benefits of a CDN are scalability, reliability and performance. The CDN Enabler plugin helps you to quickly and easily integrate a CDN in WordPress.
19	+
20	+ = What it does? =
21	+ The CDN Enabler plugin has been developed to link your content to the CDN URLs.
22	+
23	+ = Features =
24	+ * Link assets to load from a CDN
25	+ * Set included directories
26	+ * Define exclusions
27	+ * Enable or disable for HTTPS
28	+
29	+
30	+ = System Requirements =
31	+ * PHP >=5.3
32	+ * WordPress >=3.8
33	+
34	+
35	+ = Author =
36	+ * [Twitter](https://twitter.com/keycdn)
37	+ * [Google+](https://plus.google.com/+Keycdn "Google+")
38	+ * [KeyCDN](https://www.keycdn.com "KeyCDN")
39	+
40	+
41	+
42	+ == Changelog ==
43	+
44	+ = 1.0.1 =
45	+ * First major release
46	+ * Fixed warnings
47	+
48	+ = 0.0.1 =
49	+ * First release
50	+
51	+
52	+ == Screenshots ==

CDN Enabler – WordPress CDN Plugin - Version 1.0.1

Version Description

Release Info

Version 1.0.1