ezcache / includes / WebpApi.php

WebpApi.php in ezCache trunk, at includes/WebpApi.php

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1	<?php
2	namespace Upress\EzCache;
3
4	use Upress\EzCache\Utilities\Logger;
5	use WP_Error;
6
7	class WebpApi {
8	protected $domain;
9	protected $license_tail;
10	protected $license_len;
11	protected $api_url = 'https://api.ezcache-wp.com';
12
13	function __construct( $key = '' ) {
14	$this->domain = str_replace( [ 'https://', 'http://' ], '', get_bloginfo( 'wpurl' ) );
15	$this->license_tail = ! empty( $key ) ? substr( $key, -4 ) : '';
16	$this->license_len = strlen( $key );
17	}
18
19	public static function is_available() {
20	return PremiumFeatures::is_premium();
21	}
22
23	public function convert( $image_path ) {
24	if ( ! self::is_available() ) {
25	return new WP_Error( 'premium_required', 'WebP conversion requires a premium license' );
26	}
27
28	wp_raise_memory_limit( 'image' );
29
30	$file = @fopen( $image_path, 'r' );
31	if ( ! $file ) {
32	return new WP_Error( 'invalid_input_file', 'Unable to read source image file' );
33	}
34
35	$file_size = filesize( $image_path );
36	$file_data = fread( $file, $file_size );
37	@fclose( $file );
38
39	if ( false === $file_data \|\| $file_size === 0 ) {
40	return new WP_Error( 'invalid_input_file', 'Unable to read source image file' );
41	}
42
43	$mime = wp_check_filetype( $image_path );
44	$content_type = $mime['type'] ?: 'application/binary';
45
46	$quality = 80;
47	if ( strpos( $content_type, 'png' ) !== false \|\| strpos( $content_type, 'gif' ) !== false ) {
48	$quality = 100;
49	}
50
51	$url = $this->api_url . '/convert?' . http_build_query( [
52	'quality' => $quality,
53	'domain' => $this->domain,
54	'key_len' => $this->license_len,
55	] );
56
57	$request_args = [
58	'headers' => [
59	'Content-Type' => $content_type,
60	'X-Domain' => $this->domain,
61	'X-License-Tail' => $this->license_tail,
62	'X-Requested-By' => 'wp_remote_request',
63	],
64	'body' => $file_data,
65	'timeout' => 120,
66	'user-agent' => 'ezCache WebP Converter/2.0',
67	];
68
69	$max_retries = 3;
70	$retry_delay = 2;
71
72	for ( $attempt = 1; $attempt <= $max_retries; $attempt++ ) {
73	$response = wp_remote_post( $url, $request_args );
74
75	if ( is_wp_error( $response ) ) {
76	Logger::log( 'ezCache WebP API Error (attempt ' . $attempt . '): ' . $response->get_error_message() );
77	if ( $attempt < $max_retries ) {
78	sleep( $retry_delay * $attempt );
79	continue;
80	}
81	return $response;
82	}
83
84	$status_code = wp_remote_retrieve_response_code( $response );
85
86	if ( $status_code === 429 && $attempt < $max_retries ) {
87	Logger::log( 'ezCache WebP API rate limited (attempt ' . $attempt . '), retrying in ' . ($retry_delay * $attempt) . 's' );
88	sleep( $retry_delay * $attempt );
89	continue;
90	}
91
92	break;
93	}
94
95	$info = wp_remote_retrieve_headers( $response );
96	$result = wp_remote_retrieve_body( $response );
97
98	if ( $status_code !== 200 ) {
99	$error_msg = 'WebP API error (HTTP ' . $status_code . ')';
100	if ( strpos( $result, '"error"' ) !== false ) {
101	$json = json_decode( $result, true );
102	if ( isset( $json['error'] ) ) {
103	$error_msg = $json['error'];
104	}
105	}
106	Logger::log( 'ezCache WebP API Error: ' . $error_msg );
107	return new WP_Error( 'api_error', $error_msg );
108	}
109
110	$response_type = wp_remote_retrieve_header( $response, 'content-type' );
111	if ( strpos( $response_type, 'webp' ) === false ) {
112	Logger::log( 'ezCache WebP API Error: response is not WebP (got ' . $response_type . ')' );
113	return new WP_Error( 'invalid_response', 'API did not return a WebP image' );
114	}
115
116	return [ 'info' => $info, 'data' => $result ];
117	}
118	}
119