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Attachment.php
328 lines
| 1 | <?php |
| 2 | /** |
| 3 | * Private/protected video attachment handling. |
| 4 | * |
| 5 | * @package PrestoPlayer |
| 6 | */ |
| 7 | |
| 8 | namespace PrestoPlayer; |
| 9 | |
| 10 | use PrestoPlayer\Services\AdminNotices; |
| 11 | use PrestoPlayer\Services\Streamer; |
| 12 | |
| 13 | /** |
| 14 | * Handles private/protected video attachment streaming and access. |
| 15 | */ |
| 16 | class Attachment { |
| 17 | |
| 18 | /** |
| 19 | * Whether the premium version is active. |
| 20 | * |
| 21 | * @var bool |
| 22 | */ |
| 23 | protected $is_premium; |
| 24 | |
| 25 | /** |
| 26 | * Constructor. |
| 27 | * |
| 28 | * @param bool $is_premium Whether the premium version is active. |
| 29 | */ |
| 30 | public function __construct( $is_premium = false ) { |
| 31 | $this->is_premium = $is_premium; |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * Registers WordPress hooks. |
| 36 | * |
| 37 | * @return Attachment |
| 38 | */ |
| 39 | public function register() { |
| 40 | if ( $this->is_premium ) { |
| 41 | add_action( 'admin_notices', array( $this, 'checkServer' ) ); |
| 42 | } |
| 43 | add_action( 'wp_get_attachment_url', array( $this, 'replaceLink' ), 10, 2 ); |
| 44 | add_action( 'query_vars', array( $this, 'addQueryVars' ) ); |
| 45 | add_action( 'generate_rewrite_rules', array( $this, 'customRewriteRules' ) ); |
| 46 | add_action( 'template_redirect', array( $this, 'loadVirtualPage' ) ); |
| 47 | add_action( 'wp_ajax_presto_player_load_user_video', array( $this, 'refreshAjaxTempSecurityUser' ) ); |
| 48 | |
| 49 | return $this; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Refreshes the temporary security user transient via AJAX. |
| 54 | * |
| 55 | * @param string $action The AJAX action hook name. |
| 56 | * @return void |
| 57 | */ |
| 58 | public function refreshAjaxTempSecurityUser( $action ) { |
| 59 | $type = isset( $_POST['type'] ) ? sanitize_text_field( wp_unslash( $_POST['type'] ) ) : ''; |
| 60 | |
| 61 | if ( empty( $type ) ) { |
| 62 | wp_send_json_error( 'type not set' ); |
| 63 | } |
| 64 | |
| 65 | if ( ! defined( 'DOING_AJAX' ) && ! is_user_logged_in() ) { |
| 66 | wp_safe_redirect( home_url() ); |
| 67 | exit(); |
| 68 | } |
| 69 | |
| 70 | check_ajax_referer( 'presto_player' ); |
| 71 | |
| 72 | if ( 'private-hosted' === $type ) { |
| 73 | if ( isset( $_POST['id'] ) ) { |
| 74 | $post_id = (int) $_POST['id']; |
| 75 | $this->setVideoTransient( (int) $post_id ); |
| 76 | wp_send_json_success( $this->getSrc( (int) $post_id, true ) ); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | if ( ! $this->is_premium ) { |
| 81 | wp_send_json_success(); |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | wp_send_json_success(); |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Gets the transient key for the current user's video access list. |
| 90 | * |
| 91 | * @return string |
| 92 | */ |
| 93 | public function getTransientKey() { |
| 94 | if ( ! function_exists( 'wp_get_current_user' ) ) { |
| 95 | return ''; |
| 96 | } |
| 97 | $current_user = \wp_get_current_user(); |
| 98 | return 'presto-player-user-' . $current_user->ID; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Adds query vars for rewrites |
| 103 | * |
| 104 | * @param array $query_vars Existing registered query vars. |
| 105 | * @return array |
| 106 | */ |
| 107 | public function addQueryVars( $query_vars ) { |
| 108 | $query_vars[] = 'presto-player-video'; |
| 109 | $query_vars[] = 'presto-player-token'; |
| 110 | return $query_vars; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Add custom rewrite rules |
| 115 | * |
| 116 | * @param \WP_Rewrite $wp_rewrite The WP_Rewrite instance. |
| 117 | * @return void |
| 118 | */ |
| 119 | public function customRewriteRules( $wp_rewrite ) { |
| 120 | $wp_rewrite->rules = array_merge( |
| 121 | array( 'video-src/([^/]*)/(\d+)/?$' => 'index.php?presto-player-token=$matches[1]&presto-player-video=$matches[2]' ), |
| 122 | $wp_rewrite->rules |
| 123 | ); |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Load virtual template to stream video by id |
| 128 | */ |
| 129 | public function loadVirtualPage() { |
| 130 | // get video attachment id. |
| 131 | $video_id = intval( get_query_var( 'presto-player-video' ) ); |
| 132 | // get the token. |
| 133 | $token = sanitize_text_field( get_query_var( 'presto-player-token' ) ); |
| 134 | |
| 135 | if ( $video_id && $token ) { |
| 136 | if ( ! is_user_logged_in() ) { |
| 137 | wp_die( 'Access denied! :(', 'Access Denied', array( 'response' => 403 ) ); |
| 138 | } |
| 139 | $this->checkAndLoadStream( wp_get_current_user(), $video_id, $token ); |
| 140 | die; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Check the server |
| 146 | * |
| 147 | * @return void |
| 148 | */ |
| 149 | public function checkServer() { |
| 150 | // check for nginx. |
| 151 | $notice_name = 'nginx_rules'; |
| 152 | $server_software = isset( $_SERVER['SERVER_SOFTWARE'] ) ? sanitize_text_field( wp_unslash( $_SERVER['SERVER_SOFTWARE'] ) ) : false; |
| 153 | if ( ! stristr( $server_software, 'nginx' ) ) { |
| 154 | return; |
| 155 | } |
| 156 | |
| 157 | if ( current_user_can( 'install_plugins' ) && ! AdminNotices::isDismissed( $notice_name ) ) { |
| 158 | $this->showNotice( $notice_name ); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Renders the NGINX protection admin notice. |
| 164 | * |
| 165 | * @param string $notice_name The notice identifier. |
| 166 | * @return void |
| 167 | */ |
| 168 | public function showNotice( $notice_name ) { |
| 169 | ob_start(); ?> |
| 170 | |
| 171 | <div class="error"> |
| 172 | <h3>Presto Player</h3> |
| 173 | <p><?php /* translators: %s: Name of the protected uploads folder. */ printf( esc_html__( 'The video files in the %s folder are not currently protected due to your site running on NGINX.', 'presto-player' ), '<strong>presto-player-private</strong>' ); ?></p> |
| 174 | <p><?php echo wp_kses_post( __( 'If you plan on using private video, you will want to protect this directory. To protect them, you must add a firewall rule as explained in <a href="https://prestoplayer.com/protecting-videos-with-nginx" target="_blank">this guide</a>.', 'presto-player' ) ); ?></p> |
| 175 | <p><?php esc_html_e( 'If you have already added the rule, you may safely dismiss this notice', 'presto-player' ); ?></p> |
| 176 | <p><a href=" |
| 177 | <?php |
| 178 | echo esc_url( |
| 179 | add_query_arg( |
| 180 | array( |
| 181 | 'presto_action' => 'dismiss_notices', |
| 182 | 'presto_notice' => $notice_name, |
| 183 | '_wpnonce' => wp_create_nonce( 'presto-dismiss-notice' ), |
| 184 | ) |
| 185 | ) |
| 186 | ); |
| 187 | ?> |
| 188 | "><?php esc_html_e( 'Dismiss Notice', 'presto-player' ); ?></a></p> |
| 189 | </div> |
| 190 | |
| 191 | <?php |
| 192 | echo ob_get_clean(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Notice markup is composed of the internally escaped strings above. |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * Sets the transient for video access |
| 197 | * Sets this for 24 hours |
| 198 | * |
| 199 | * @param integer $post_id The attachment post ID. |
| 200 | * @return void |
| 201 | */ |
| 202 | public function setVideoTransient( $post_id ) { |
| 203 | $videos = (array) get_transient( $this->getTransientKey() ); |
| 204 | $videos[] = sanitize_text_field( $post_id ); |
| 205 | |
| 206 | // set temporary user transient for access for 1 hour. |
| 207 | set_transient( $this->getTransientKey(), array_filter( array_unique( $videos ) ), 24 * HOUR_IN_SECONDS ); |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * Gets the source URL for an attachment. |
| 212 | * |
| 213 | * @param int $id The attachment ID. |
| 214 | * @param bool $private Whether to return the private (protected) URL. |
| 215 | * @return string|false |
| 216 | */ |
| 217 | public static function getSrc( $id, $private = false ) { |
| 218 | if ( $private ) { |
| 219 | return self::getPrivateSrc( $id ); |
| 220 | } |
| 221 | return wp_get_attachment_url( $id ); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * Gets the public (unprotected) source URL for an attachment. |
| 226 | * |
| 227 | * @param int $id The attachment ID. |
| 228 | * @return string|false |
| 229 | */ |
| 230 | public static function getPublicSrc( $id ) { |
| 231 | global $presto_override_private_url; |
| 232 | $old = $presto_override_private_url; |
| 233 | $presto_override_private_url = true; |
| 234 | $url = wp_get_attachment_url( $id ); |
| 235 | $presto_override_private_url = $old; |
| 236 | return $url; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Determines whether an attachment is private. |
| 241 | * |
| 242 | * @param int $id The attachment ID. |
| 243 | * @return int|false Position of the marker in the URL, or false if public. |
| 244 | */ |
| 245 | public static function isPrivate( $id ) { |
| 246 | return strpos( wp_get_attachment_url( $id ), 'video-src' ); |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Gets the private (token-protected) source URL for an attachment. |
| 251 | * |
| 252 | * @param int $id The attachment ID. |
| 253 | * @return string |
| 254 | */ |
| 255 | public static function getPrivateSrc( $id ) { |
| 256 | if ( ! function_exists( 'wp_create_nonce' ) ) { |
| 257 | return ''; |
| 258 | } |
| 259 | // set temporary user transient for access for 1 hour. |
| 260 | ( new self() )->setVideoTransient( $id ); |
| 261 | if ( ! get_option( 'permalink_structure' ) ) { |
| 262 | return sprintf( site_url( '?presto-player-video=%d&presto-player-token=%s' ), $id, wp_create_nonce( 'presto-player-user-token' ) ); |
| 263 | } |
| 264 | return sprintf( site_url( 'video-src/%s/%d' ), wp_create_nonce( 'presto-player-user-token' ), $id ); |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * Replaces attachment link |
| 269 | * |
| 270 | * @param string $url The attachment URL. |
| 271 | * @param int $post_id The attachment post ID. |
| 272 | * @return string |
| 273 | */ |
| 274 | public function replaceLink( $url, $post_id ) { |
| 275 | global $presto_override_private_url; |
| 276 | |
| 277 | // only replace for our folder. |
| 278 | if ( ! stristr( $url, 'presto-player-private' ) ) { |
| 279 | return $url; |
| 280 | } |
| 281 | |
| 282 | if ( ! $presto_override_private_url ) { |
| 283 | return self::getPrivateSrc( $post_id ); |
| 284 | } else { |
| 285 | return $url; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Check and load stream through PHP |
| 291 | * |
| 292 | * @param \WP_User $current_user The current user object. |
| 293 | * @param integer $attachment_id The attachment post ID. |
| 294 | * @param string $token The security token. |
| 295 | * @return void |
| 296 | */ |
| 297 | public function checkAndLoadStream( $current_user, $attachment_id, $token ) { |
| 298 | $security_token = isset( $token ) ? wp_verify_nonce( $token, 'presto-player-user-token' ) : false; |
| 299 | $temp_security_user = get_transient( $this->getTransientKey() ); |
| 300 | |
| 301 | /** |
| 302 | * Start video stream with the correct video SRC only in case of pass security rules |
| 303 | */ |
| 304 | if ( $security_token && $temp_security_user && $attachment_id > 0 && in_array( $attachment_id, $temp_security_user ) ) { |
| 305 | $video_file = get_attached_file( $attachment_id ); |
| 306 | $file_type = wp_check_filetype( $video_file ); |
| 307 | |
| 308 | /** |
| 309 | * Start video stream to show the video |
| 310 | */ |
| 311 | $video_stream = new Streamer( $video_file, $file_type['type'] ); |
| 312 | $video_stream->start(); |
| 313 | exit(); |
| 314 | } else { |
| 315 | |
| 316 | /** |
| 317 | * Alert user about the misconduct by accessing directly |
| 318 | */ |
| 319 | $message = sprintf( |
| 320 | /* translators: %1$s: Current user display name. */ |
| 321 | __( 'Sorry %1$s! Access to this video is not allowed. An administrator will be informed.', 'presto-player' ), |
| 322 | ucfirst( $current_user->display_name ) |
| 323 | ); |
| 324 | wp_die( esc_html( $message ), esc_html__( 'Forbidden', 'presto-player' ), 403 ); |
| 325 | } |
| 326 | } |
| 327 | } |
| 328 |