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wp-async-request.php
164 lines
| 1 | <?php |
| 2 | /** |
| 3 | * WP Async Request |
| 4 | * |
| 5 | * @package WP-Background-Processing |
| 6 | */ |
| 7 | |
| 8 | if ( ! class_exists( 'WP_Async_Request' ) ) { |
| 9 | |
| 10 | /** |
| 11 | * Abstract WP_Async_Request class. |
| 12 | * |
| 13 | * @abstract |
| 14 | */ |
| 15 | abstract class WP_Async_Request { |
| 16 | |
| 17 | /** |
| 18 | * Prefix |
| 19 | * |
| 20 | * (default value: 'wp') |
| 21 | * |
| 22 | * @var string |
| 23 | * @access protected |
| 24 | */ |
| 25 | protected $prefix = 'wp'; |
| 26 | |
| 27 | /** |
| 28 | * Action |
| 29 | * |
| 30 | * (default value: 'async_request') |
| 31 | * |
| 32 | * @var string |
| 33 | * @access protected |
| 34 | */ |
| 35 | protected $action = 'async_request'; |
| 36 | |
| 37 | /** |
| 38 | * Identifier |
| 39 | * |
| 40 | * @var mixed |
| 41 | * @access protected |
| 42 | */ |
| 43 | protected $identifier; |
| 44 | |
| 45 | /** |
| 46 | * Data |
| 47 | * |
| 48 | * (default value: array()) |
| 49 | * |
| 50 | * @var array |
| 51 | * @access protected |
| 52 | */ |
| 53 | protected $data = array(); |
| 54 | |
| 55 | /** |
| 56 | * Initiate new async request |
| 57 | */ |
| 58 | public function __construct() { |
| 59 | $this->identifier = $this->prefix . '_' . $this->action; |
| 60 | |
| 61 | add_action( 'wp_ajax_' . $this->identifier, array( $this, 'maybe_handle' ) ); |
| 62 | add_action( 'wp_ajax_nopriv_' . $this->identifier, array( $this, 'maybe_handle' ) ); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Set data used during the request |
| 67 | * |
| 68 | * @param array $data Data. |
| 69 | * |
| 70 | * @return $this |
| 71 | */ |
| 72 | public function data( $data ) { |
| 73 | $this->data = $data; |
| 74 | |
| 75 | return $this; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Dispatch the async request |
| 80 | * |
| 81 | * @return array|WP_Error |
| 82 | */ |
| 83 | public function dispatch() { |
| 84 | $url = add_query_arg( $this->get_query_args(), $this->get_query_url() ); |
| 85 | $args = $this->get_post_args(); |
| 86 | |
| 87 | return wp_remote_post( esc_url_raw( $url ), $args ); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Get query args |
| 92 | * |
| 93 | * @return array |
| 94 | */ |
| 95 | protected function get_query_args() { |
| 96 | if ( property_exists( $this, 'query_args' ) ) { |
| 97 | return $this->query_args; |
| 98 | } |
| 99 | |
| 100 | return array( |
| 101 | 'action' => $this->identifier, |
| 102 | 'nonce' => wp_create_nonce( $this->identifier ), |
| 103 | ); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Get query URL |
| 108 | * |
| 109 | * @return string |
| 110 | */ |
| 111 | protected function get_query_url() { |
| 112 | if ( property_exists( $this, 'query_url' ) ) { |
| 113 | return $this->query_url; |
| 114 | } |
| 115 | |
| 116 | return admin_url( 'admin-ajax.php' ); |
| 117 | } |
| 118 | |
| 119 | /** |
| 120 | * Get post args |
| 121 | * |
| 122 | * @return array |
| 123 | */ |
| 124 | protected function get_post_args() { |
| 125 | if ( property_exists( $this, 'post_args' ) ) { |
| 126 | return $this->post_args; |
| 127 | } |
| 128 | |
| 129 | return array( |
| 130 | 'timeout' => 0.01, |
| 131 | 'blocking' => false, |
| 132 | 'body' => $this->data, |
| 133 | 'cookies' => $_COOKIE, |
| 134 | 'sslverify' => apply_filters( 'https_local_ssl_verify', false ), |
| 135 | ); |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Maybe handle |
| 140 | * |
| 141 | * Check for correct nonce and pass to handler. |
| 142 | */ |
| 143 | public function maybe_handle() { |
| 144 | // Don't lock up other requests while processing |
| 145 | session_write_close(); |
| 146 | |
| 147 | check_ajax_referer( $this->identifier, 'nonce' ); |
| 148 | |
| 149 | $this->handle(); |
| 150 | |
| 151 | wp_die(); |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Handle |
| 156 | * |
| 157 | * Override this method to perform any actions required |
| 158 | * during the async request. |
| 159 | */ |
| 160 | abstract protected function handle(); |
| 161 | |
| 162 | } |
| 163 | } |
| 164 |