hostinger / includes / Cdn / CachePurger.php

CachePurger.php in Hostinger Tools 3.0.79, at includes/Cdn/CachePurger.php

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1	<?php
2
3	namespace Hostinger\Cdn;
4
5	use Hostinger\WpHelper\Utils;
6	use WP_Http;
7	use WP_Error;
8
9	defined( 'ABSPATH' ) \|\| exit;
10
11	class CachePurger {
12	private const INSTALLATIONS_BASE = '/api/v1/installations/';
13	private const ALL_CACHE_PATH = '/cache';
14	private const CDN_CACHE_PATH = '/cache/cdn';
15
16	private CacheClient $client;
17	private SoftwareIdResolver $resolver;
18	private Utils $utils;
19
20	public function __construct( CacheClient $client, SoftwareIdResolver $resolver, Utils $utils ) {
21	$this->client = $client;
22	$this->resolver = $resolver;
23	$this->utils = $utils;
24	}
25
26	public function purge_all(): array\|WP_Error {
27	return $this->purge( self::ALL_CACHE_PATH );
28	}
29
30	public function purge_cdn(): array\|WP_Error {
31	return $this->purge( self::CDN_CACHE_PATH );
32	}
33
34	private function purge( string $path ): array\|WP_Error {
35	$domain = $this->resolver->site_domain();
36
37	if ( ! $this->is_eligible( $domain ) ) {
38	return array(
39	'purged' => false,
40	'skipped' => true,
41	'message' => __( 'Cache clearing is not available for this site.', 'hostinger' ),
42	);
43	}
44
45	$software_id = $this->resolver->resolve();
46
47	if ( $software_id === null ) {
48	return new WP_Error(
49	'hostinger_cdn_no_software_id',
50	__( 'Could not determine the Hostinger installation for this site.', 'hostinger' )
51	);
52	}
53
54	$endpoint = self::INSTALLATIONS_BASE . rawurlencode( $software_id ) . $path;
55	$response = $this->client->delete( $endpoint, $domain );
56
57	if ( is_wp_error( $response ) ) {
58	$this->log_failure( $endpoint, $response->get_error_message() );
59
60	return $this->purge_failed();
61	}
62
63	$response_code = wp_remote_retrieve_response_code( $response );
64
65	if ( WP_Http::NOT_FOUND === $response_code ) {
66	$retry = $this->retry_with_fresh_software_id( $software_id, $path, $domain );
67
68	if ( $retry !== null ) {
69	$response = $retry;
70	$response_code = wp_remote_retrieve_response_code( $response );
71	}
72	}
73
74	if ( $response_code >= 300 ) {
75	$this->log_failure( $endpoint, $response_code . ' ' . sanitize_text_field( wp_remote_retrieve_response_message( $response ) ) );
76
77	return $this->purge_failed();
78	}
79
80	return array(
81	'purged' => true,
82	'skipped' => false,
83	'message' => __( 'Cache has been cleared', 'hostinger' ),
84	);
85	}
86
87	private function is_eligible( ?string $domain ): bool {
88	if ( empty( $_SERVER['H_PLATFORM'] ) ) {
89	return false;
90	}
91
92	return $domain !== null;
93	}
94
95	private function retry_with_fresh_software_id( string $stale_id, string $path, string $domain ): array\|null {
96	$this->log_failure( self::INSTALLATIONS_BASE . $stale_id . $path, '404 - cached software_id looks stale, re-resolving' );
97
98	$this->resolver->forget();
99
100	$fresh_id = $this->resolver->resolve();
101
102	if ( $fresh_id === null \|\| $fresh_id === $stale_id ) {
103	return null;
104	}
105
106	$response = $this->client->delete(
107	self::INSTALLATIONS_BASE . rawurlencode( $fresh_id ) . $path,
108	$domain
109	);
110
111	return is_wp_error( $response ) ? null : $response;
112	}
113
114	private function purge_failed(): WP_Error {
115	return new WP_Error(
116	'hostinger_cdn_purge_failed',
117	__( 'We could not clear the cache. Please try again later.', 'hostinger' )
118	);
119	}
120
121	private function log_failure( string $endpoint, string $reason ): void {
122	$this->utils->errorLog( 'Hostinger Tools hCDN purge failed: DELETE ' . $endpoint . ' -- ' . $reason );
123	}
124	}
125