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3 years ago
css
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js
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capabilities.php
7 years ago
config-validator.php
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contact-form-functions.php
3 years ago
contact-form-template.php
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contact-form.php
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controller.php
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file.php
3 years ago
form-tag.php
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form-tags-manager.php
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formatting.php
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validation.php
3 years ago
file.php
425 lines
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Validates uploaded files and moves them to the temporary directory. |
| 5 | * |
| 6 | * @param array $file An item of `$_FILES`. |
| 7 | * @param string|array $args Optional. Arguments to control behavior. |
| 8 | * @return array|WP_Error Array of file paths, or WP_Error if validation fails. |
| 9 | */ |
| 10 | function wpcf7_unship_uploaded_file( $file, $args = '' ) { |
| 11 | $args = wp_parse_args( $args, array( |
| 12 | 'required' => false, |
| 13 | 'filetypes' => '', |
| 14 | 'limit' => MB_IN_BYTES, |
| 15 | ) ); |
| 16 | |
| 17 | foreach ( array( 'name', 'size', 'tmp_name', 'error' ) as $key ) { |
| 18 | if ( ! isset( $file[$key] ) ) { |
| 19 | $file[$key] = array(); |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | $names = wpcf7_array_flatten( $file['name'] ); |
| 24 | $sizes = wpcf7_array_flatten( $file['size'] ); |
| 25 | $tmp_names = wpcf7_array_flatten( $file['tmp_name'] ); |
| 26 | $errors = wpcf7_array_flatten( $file['error'] ); |
| 27 | |
| 28 | foreach ( $errors as $error ) { |
| 29 | if ( ! empty( $error ) and UPLOAD_ERR_NO_FILE !== $error ) { |
| 30 | return new WP_Error( 'wpcf7_upload_failed_php_error', |
| 31 | wpcf7_get_message( 'upload_failed_php_error' ) |
| 32 | ); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | if ( isset( $args['schema'] ) and isset( $args['name'] ) ) { |
| 37 | $result = $args['schema']->validate( array( |
| 38 | 'file' => true, |
| 39 | 'field' => $args['name'], |
| 40 | ) ); |
| 41 | |
| 42 | if ( is_wp_error( $result ) ) { |
| 43 | return $result; |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | // Move uploaded file to tmp dir |
| 48 | $uploads_dir = wpcf7_upload_tmp_dir(); |
| 49 | $uploads_dir = wpcf7_maybe_add_random_dir( $uploads_dir ); |
| 50 | |
| 51 | $uploaded_files = array(); |
| 52 | |
| 53 | foreach ( $names as $key => $name ) { |
| 54 | $tmp_name = $tmp_names[$key]; |
| 55 | |
| 56 | if ( empty( $tmp_name ) or ! is_uploaded_file( $tmp_name ) ) { |
| 57 | continue; |
| 58 | } |
| 59 | |
| 60 | $filename = $name; |
| 61 | $filename = wpcf7_canonicalize( $filename, array( 'strto' => 'as-is' ) ); |
| 62 | $filename = wpcf7_antiscript_file_name( $filename ); |
| 63 | |
| 64 | $filename = apply_filters( 'wpcf7_upload_file_name', |
| 65 | $filename, $name, $args |
| 66 | ); |
| 67 | |
| 68 | $filename = wp_unique_filename( $uploads_dir, $filename ); |
| 69 | $new_file = path_join( $uploads_dir, $filename ); |
| 70 | |
| 71 | if ( false === @move_uploaded_file( $tmp_name, $new_file ) ) { |
| 72 | return new WP_Error( 'wpcf7_upload_failed', |
| 73 | wpcf7_get_message( 'upload_failed' ) |
| 74 | ); |
| 75 | } |
| 76 | |
| 77 | // Make sure the uploaded file is only readable for the owner process |
| 78 | chmod( $new_file, 0400 ); |
| 79 | |
| 80 | $uploaded_files[] = $new_file; |
| 81 | } |
| 82 | |
| 83 | return $uploaded_files; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | add_filter( |
| 88 | 'wpcf7_messages', |
| 89 | 'wpcf7_file_messages', |
| 90 | 10, 1 |
| 91 | ); |
| 92 | |
| 93 | /** |
| 94 | * A wpcf7_messages filter callback that adds messages for |
| 95 | * file-uploading fields. |
| 96 | */ |
| 97 | function wpcf7_file_messages( $messages ) { |
| 98 | return array_merge( $messages, array( |
| 99 | 'upload_failed' => array( |
| 100 | 'description' => __( "Uploading a file fails for any reason", 'contact-form-7' ), |
| 101 | 'default' => __( "There was an unknown error uploading the file.", 'contact-form-7' ), |
| 102 | ), |
| 103 | |
| 104 | 'upload_file_type_invalid' => array( |
| 105 | 'description' => __( "Uploaded file is not allowed for file type", 'contact-form-7' ), |
| 106 | 'default' => __( "You are not allowed to upload files of this type.", 'contact-form-7' ), |
| 107 | ), |
| 108 | |
| 109 | 'upload_file_too_large' => array( |
| 110 | 'description' => __( "Uploaded file is too large", 'contact-form-7' ), |
| 111 | 'default' => __( "The uploaded file is too large.", 'contact-form-7' ), |
| 112 | ), |
| 113 | |
| 114 | 'upload_failed_php_error' => array( |
| 115 | 'description' => __( "Uploading a file fails for PHP error", 'contact-form-7' ), |
| 116 | 'default' => __( "There was an error uploading the file.", 'contact-form-7' ), |
| 117 | ), |
| 118 | ) ); |
| 119 | } |
| 120 | |
| 121 | |
| 122 | add_filter( |
| 123 | 'wpcf7_form_enctype', |
| 124 | 'wpcf7_file_form_enctype_filter', |
| 125 | 10, 1 |
| 126 | ); |
| 127 | |
| 128 | /** |
| 129 | * A wpcf7_form_enctype filter callback that sets the enctype attribute |
| 130 | * to multipart/form-data if the form has file-uploading fields. |
| 131 | */ |
| 132 | function wpcf7_file_form_enctype_filter( $enctype ) { |
| 133 | $multipart = (bool) wpcf7_scan_form_tags( array( |
| 134 | 'feature' => 'file-uploading', |
| 135 | ) ); |
| 136 | |
| 137 | if ( $multipart ) { |
| 138 | $enctype = 'multipart/form-data'; |
| 139 | } |
| 140 | |
| 141 | return $enctype; |
| 142 | } |
| 143 | |
| 144 | |
| 145 | /** |
| 146 | * Converts a MIME type string to an array of corresponding file extensions. |
| 147 | * |
| 148 | * @param string $mime MIME type. |
| 149 | * Wildcard (*) is available for the subtype part. |
| 150 | * @return array Corresponding file extensions. |
| 151 | */ |
| 152 | function wpcf7_convert_mime_to_ext( $mime ) { |
| 153 | static $mime_types = array(); |
| 154 | |
| 155 | $mime_types = wp_get_mime_types(); |
| 156 | |
| 157 | $results = array(); |
| 158 | |
| 159 | if ( preg_match( '%^([a-z]+)/([*]|[a-z0-9.+-]+)$%i', $mime, $matches ) ) { |
| 160 | foreach ( $mime_types as $key => $val ) { |
| 161 | if ( '*' === $matches[2] and str_starts_with( $val, $matches[1] . '/' ) |
| 162 | or $val === $matches[0] ) { |
| 163 | $results = array_merge( $results, explode( '|', $key ) ); |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | $results = array_unique( $results ); |
| 169 | $results = array_filter( $results ); |
| 170 | $results = array_values( $results ); |
| 171 | |
| 172 | return $results; |
| 173 | } |
| 174 | |
| 175 | |
| 176 | /** |
| 177 | * Returns a formatted list of acceptable filetypes. |
| 178 | * |
| 179 | * @param string|array $types Optional. Array of filetypes. |
| 180 | * @param string $format Optional. Pre-defined format designator. |
| 181 | * @return string Formatted list of acceptable filetypes. |
| 182 | */ |
| 183 | function wpcf7_acceptable_filetypes( $types = 'default', $format = 'regex' ) { |
| 184 | if ( 'default' === $types or empty( $types ) ) { |
| 185 | $types = array( |
| 186 | 'audio/*', |
| 187 | 'video/*', |
| 188 | 'image/*', |
| 189 | ); |
| 190 | } else { |
| 191 | $types = array_map( |
| 192 | function ( $type ) { |
| 193 | if ( is_string( $type ) ) { |
| 194 | return preg_split( '/[\s|,]+/', strtolower( $type ) ); |
| 195 | } |
| 196 | }, |
| 197 | (array) $types |
| 198 | ); |
| 199 | |
| 200 | $types = wpcf7_array_flatten( $types ); |
| 201 | $types = array_filter( array_unique( $types ) ); |
| 202 | } |
| 203 | |
| 204 | if ( 'attr' === $format or 'attribute' === $format ) { |
| 205 | $types = array_map( |
| 206 | function ( $type ) { |
| 207 | if ( false === strpos( $type, '/' ) ) { |
| 208 | return sprintf( '.%s', trim( $type, '.' ) ); |
| 209 | } elseif ( preg_match( '%^([a-z]+)/[*]$%i', $type, $matches ) ) { |
| 210 | if ( in_array( $matches[1], array( 'audio', 'video', 'image' ) ) ) { |
| 211 | return $type; |
| 212 | } else { |
| 213 | return ''; |
| 214 | } |
| 215 | } elseif ( wpcf7_convert_mime_to_ext( $type ) ) { |
| 216 | return $type; |
| 217 | } |
| 218 | }, |
| 219 | $types |
| 220 | ); |
| 221 | |
| 222 | $types = array_filter( $types ); |
| 223 | |
| 224 | return implode( ',', $types ); |
| 225 | |
| 226 | } elseif ( 'regex' === $format ) { |
| 227 | $types = array_map( |
| 228 | function ( $type ) { |
| 229 | if ( false === strpos( $type, '/' ) ) { |
| 230 | return preg_quote( trim( $type, '.' ) ); |
| 231 | } elseif ( $type = wpcf7_convert_mime_to_ext( $type ) ) { |
| 232 | return $type; |
| 233 | } |
| 234 | }, |
| 235 | $types |
| 236 | ); |
| 237 | |
| 238 | $types = wpcf7_array_flatten( $types ); |
| 239 | $types = array_filter( array_unique( $types ) ); |
| 240 | |
| 241 | return implode( '|', $types ); |
| 242 | } |
| 243 | |
| 244 | return ''; |
| 245 | } |
| 246 | |
| 247 | |
| 248 | add_action( |
| 249 | 'wpcf7_init', |
| 250 | 'wpcf7_init_uploads', |
| 251 | 10, 0 |
| 252 | ); |
| 253 | |
| 254 | /** |
| 255 | * Initializes the temporary directory for uploaded files. |
| 256 | */ |
| 257 | function wpcf7_init_uploads() { |
| 258 | $dir = wpcf7_upload_tmp_dir(); |
| 259 | |
| 260 | if ( is_dir( $dir ) and is_writable( $dir ) ) { |
| 261 | $htaccess_file = path_join( $dir, '.htaccess' ); |
| 262 | |
| 263 | if ( file_exists( $htaccess_file ) ) { |
| 264 | list( $first_line_comment ) = (array) file( |
| 265 | $htaccess_file, |
| 266 | FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES |
| 267 | ); |
| 268 | |
| 269 | if ( '# Apache 2.4+' === $first_line_comment ) { |
| 270 | return; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | if ( $handle = @fopen( $htaccess_file, 'w' ) ) { |
| 275 | fwrite( $handle, "# Apache 2.4+\n" ); |
| 276 | fwrite( $handle, "<IfModule authz_core_module>\n" ); |
| 277 | fwrite( $handle, " Require all denied\n" ); |
| 278 | fwrite( $handle, "</IfModule>\n" ); |
| 279 | fwrite( $handle, "\n" ); |
| 280 | fwrite( $handle, "# Apache 2.2\n" ); |
| 281 | fwrite( $handle, "<IfModule !authz_core_module>\n" ); |
| 282 | fwrite( $handle, " Deny from all\n" ); |
| 283 | fwrite( $handle, "</IfModule>\n" ); |
| 284 | |
| 285 | fclose( $handle ); |
| 286 | } |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | |
| 291 | /** |
| 292 | * Creates a child directory with a randomly generated name. |
| 293 | * |
| 294 | * @param string $dir The parent directory path. |
| 295 | * @return string The child directory path if created, otherwise the parent. |
| 296 | */ |
| 297 | function wpcf7_maybe_add_random_dir( $dir ) { |
| 298 | do { |
| 299 | $rand_max = mt_getrandmax(); |
| 300 | $rand = zeroise( mt_rand( 0, $rand_max ), strlen( $rand_max ) ); |
| 301 | $dir_new = path_join( $dir, $rand ); |
| 302 | } while ( file_exists( $dir_new ) ); |
| 303 | |
| 304 | if ( wp_mkdir_p( $dir_new ) ) { |
| 305 | return $dir_new; |
| 306 | } |
| 307 | |
| 308 | return $dir; |
| 309 | } |
| 310 | |
| 311 | |
| 312 | /** |
| 313 | * Returns the directory path for uploaded files. |
| 314 | * |
| 315 | * @return string Directory path. |
| 316 | */ |
| 317 | function wpcf7_upload_tmp_dir() { |
| 318 | if ( defined( 'WPCF7_UPLOADS_TMP_DIR' ) ) { |
| 319 | $dir = path_join( WP_CONTENT_DIR, WPCF7_UPLOADS_TMP_DIR ); |
| 320 | wp_mkdir_p( $dir ); |
| 321 | |
| 322 | if ( wpcf7_is_file_path_in_content_dir( $dir ) ) { |
| 323 | return $dir; |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | $dir = path_join( wpcf7_upload_dir( 'dir' ), 'wpcf7_uploads' ); |
| 328 | wp_mkdir_p( $dir ); |
| 329 | return $dir; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | add_action( |
| 334 | 'shutdown', |
| 335 | 'wpcf7_cleanup_upload_files', |
| 336 | 20, 0 |
| 337 | ); |
| 338 | |
| 339 | /** |
| 340 | * Cleans up files in the temporary directory for uploaded files. |
| 341 | * |
| 342 | * @param int $seconds Files older than this are removed. Default 60. |
| 343 | * @param int $max Maximum number of files to be removed in a function call. |
| 344 | * Default 100. |
| 345 | */ |
| 346 | function wpcf7_cleanup_upload_files( $seconds = 60, $max = 100 ) { |
| 347 | $dir = trailingslashit( wpcf7_upload_tmp_dir() ); |
| 348 | |
| 349 | if ( ! is_dir( $dir ) |
| 350 | or ! is_readable( $dir ) |
| 351 | or ! wp_is_writable( $dir ) ) { |
| 352 | return; |
| 353 | } |
| 354 | |
| 355 | $seconds = absint( $seconds ); |
| 356 | $max = absint( $max ); |
| 357 | $count = 0; |
| 358 | |
| 359 | if ( $handle = opendir( $dir ) ) { |
| 360 | while ( false !== ( $file = readdir( $handle ) ) ) { |
| 361 | if ( '.' == $file |
| 362 | or '..' == $file |
| 363 | or '.htaccess' == $file ) { |
| 364 | continue; |
| 365 | } |
| 366 | |
| 367 | $mtime = @filemtime( path_join( $dir, $file ) ); |
| 368 | |
| 369 | if ( $mtime and time() < $mtime + $seconds ) { // less than $seconds old |
| 370 | continue; |
| 371 | } |
| 372 | |
| 373 | wpcf7_rmdir_p( path_join( $dir, $file ) ); |
| 374 | $count += 1; |
| 375 | |
| 376 | if ( $max <= $count ) { |
| 377 | break; |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | closedir( $handle ); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | |
| 386 | add_action( |
| 387 | 'wpcf7_admin_warnings', |
| 388 | 'wpcf7_file_display_warning_message', |
| 389 | 10, 3 |
| 390 | ); |
| 391 | |
| 392 | /** |
| 393 | * Displays warning messages about file-uploading fields. |
| 394 | */ |
| 395 | function wpcf7_file_display_warning_message( $page, $action, $object ) { |
| 396 | if ( $object instanceof WPCF7_ContactForm ) { |
| 397 | $contact_form = $object; |
| 398 | } else { |
| 399 | return; |
| 400 | } |
| 401 | |
| 402 | $has_tags = (bool) $contact_form->scan_form_tags( array( |
| 403 | 'feature' => 'file-uploading', |
| 404 | ) ); |
| 405 | |
| 406 | if ( ! $has_tags ) { |
| 407 | return; |
| 408 | } |
| 409 | |
| 410 | $uploads_dir = wpcf7_upload_tmp_dir(); |
| 411 | |
| 412 | if ( ! is_dir( $uploads_dir ) or ! wp_is_writable( $uploads_dir ) ) { |
| 413 | $message = sprintf( |
| 414 | /* translators: %s: the path of the temporary folder */ |
| 415 | __( 'This contact form has file uploading fields, but the temporary folder for the files (%s) does not exist or is not writable. You can create the folder or change its permission manually.', 'contact-form-7' ), |
| 416 | $uploads_dir |
| 417 | ); |
| 418 | |
| 419 | echo sprintf( |
| 420 | '<div class="notice notice-warning"><p>%s</p></div>', |
| 421 | esc_html( $message ) |
| 422 | ); |
| 423 | } |
| 424 | } |
| 425 |