wp-optimize / includes / class-re-smush-it-task.php

class-re-smush-it-task.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 4.5.3, at includes/class-re-smush-it-task.php

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1	<?php
2	/**
3	* A sample implementation using the Resmush.it API and our tasks library
4	*/
5
6	if (!defined('ABSPATH')) die('Access denied.');
7
8	if (!class_exists('Re_Smush_It_Task')) :
9
10	class Re_Smush_It_Task extends Updraft_Smush_Task {
11
12	/**
13	* Task name
14	*
15	* @var string
16	*/
17	public $label = 're-smush-it';
18
19	/**
20	* Maximum filesize
21	*/
22	const MAX_FILESIZE = 5242880;
23
24	/**
25	* API URL
26	*/
27	const API_URL = 'https://api.resmush.it/';
28
29	/**
30	* Checks if the server is online
31	*
32	* @return boolean - true if yes, false otherwise
33	*/
34	public static function is_server_online() {
35
36	global $wp_version;
37	$test_image = WPO_PLUGIN_MAIN_PATH . 'images/icon/wpo.png';
38	$boundary = wp_generate_password();
39	$file_name = basename($test_image);
40
41	$body = "--$boundary";
42	$body .= "\r\n";
43	$body .= "Content-Disposition: form-data; name=\"files\"; filename=\"$file_name\"\r\n";
44	$body .= "\r\n";
45	$body .= file_get_contents($test_image);
46	$body .= "\r\n";
47	$body .= "--$boundary";
48
49	$request = array(
50	'headers' => array( "content-type" => "multipart/form-data; boundary=$boundary" ),
51	'user-agent' => "WordPress $wp_version/WP-Optimize ".WPO_VERSION.' - anonymous', // Anonymous until Resmushit has a clear privacy statement that we can link to
52	'timeout' => 10,
53	'body' => $body,
54	);
55
56	$response = wp_remote_post(self::API_URL, $request);
57
58	if (is_wp_error($response)) {
59	update_option(__CLASS__, $response->get_error_message());
60	return false;
61	}
62
63	$data = json_decode(wp_remote_retrieve_body($response));
64
65
66	if (empty($data)) {
67	update_option(__CLASS__, "Empty data returned by server");
68	return false;
69	}
70
71	if (isset($data->error)) {
72	update_option(__CLASS__, $data->error_long);
73	return false;
74	}
75
76	return true;
77	}
78
79	/**
80	* Prepares the image as part of the post data for the specific implementation
81	*
82	* @param string $local_file - The image to e optimised
83	* @param array $options - Eventual options
84	*
85	* @return array
86	*/
87	public function prepare_post_request($local_file, $options) {
88	global $wp_version;
89
90	$boundary = wp_generate_password();
91	$headers = array( "content-type" => "multipart/form-data; boundary=$boundary" );
92
93	$lossy = $this->get_option('lossy_compression');
94
95	if ($lossy) {
96	$quality = $this->get_option('image_quality');
97	} else {
98	$quality = 92;
99	}
100
101	if (isset($options['quality']) && is_int($options['quality']) && 0 < $options['quality']) $quality = $options['quality'];
102
103	$post_fields = array(
104	'qlty' => $quality,
105	'exif' => $this->get_option('preserve_exif', false)
106	);
107	$payload = '';
108	$file_name = basename($local_file);
109
110	foreach ($post_fields as $name => $value) {
111	$payload .= "--$boundary";
112	$payload .= "\r\n";
113	$payload .= "Content-Disposition: form-data; name='$name' \r\n\r\n $value";
114	$payload .= "\r\n";
115	}
116
117	$payload .= "--$boundary";
118	$payload .= "\r\n";
119	$payload .= "Content-Disposition: form-data; name=\"files\"; filename=\"$file_name\"\r\n";
120	$payload .= "\r\n";
121	$payload .= file_get_contents($local_file);
122	$payload .= "\r\n";
123	$payload .= "--$boundary";
124
125	return array(
126	'headers' => $headers,
127	'timeout' => $this->get_option('request_timeout'),
128	'user-agent' => "WordPress $wp_version/WP-Optimize ".WPO_VERSION.' - anonymous', // Anonymous until Resmushit has a clear privacy statement that we can link to
129	'body' => $payload,
130	);
131	}
132
133	/**
134	* Processes the response received from the remote server
135	*
136	* @param mixed $response - The response object
137	*/
138	public function process_server_response($response) {
139
140	$response = parent::process_server_response($response);
141	$data = json_decode(wp_remote_retrieve_body($response));
142
143	if (!$data) {
144	$this->log("Cannot establish connection with reSmush.it webservice. Please try later");
145	return false;
146	}
147
148	if (isset($data->error)) {
149	$this->fail($data->error, $data->error_long);
150	return false;
151	}
152
153	if (!property_exists($data, 'dest')) {
154	$this->fail("invalid_response", "The response does not contain the compressed file URL");
155	$this->log("data: ".wp_json_encode($data));
156	return false;
157	}
158
159	$compressed_image_response = wp_remote_get($data->dest);
160
161	if (!is_wp_error($compressed_image_response)) {
162	$image_contents = wp_remote_retrieve_body($compressed_image_response);
163	if ($this->is_downloaded_image_buffer_mime_type_valid($image_contents)) {
164	return $image_contents;
165	} else {
166	$this->log("The downloaded resource does not have a matching mime type.");
167	return false;
168	}
169	} else {
170	$this->fail("invalid_response", "The compression apparently succeeded, but WP-Optimize could not retrieve the compressed image from the remote server.");
171	$this->log("data: ".wp_json_encode($data));
172	$this->log("error: ".$compressed_image_response->get_error_message());
173	return false;
174	}
175	}
176
177	/**
178	* Retrieve features for this service
179	*
180	* @return array - an array of options
181	*/
182	public static function get_features() {
183	return array(
184	'max_filesize' => self::MAX_FILESIZE,
185	'lossy_compression' => false,
186	'preserve_exif' => true,
187	);
188	}
189
190	/**
191	* Retrieve default options for this task type.
192	*
193	* @return array - an array of options
194	*/
195	public function get_default_options() {
196	return array(
197	'allowed_file_types' => array('gif', 'png', 'jpg', 'tif', 'jpeg'),
198	'request_timeout' => 30,
199	'keep_original' => true,
200	'preserve_exif' => false,
201	'image_quality' => 92,
202	'api_endpoint' => self::API_URL,
203	'max_filesize' => self::MAX_FILESIZE,
204	'version' => '0.1.13',
205	'backup_prefix' => '-updraft-pre-smush-original.'
206	);
207	}
208	}
209	endif;
210