PHP GFForms::add_security_files方法代碼示例

 public static function upload()
 {
     GFCommon::log_debug('GFAsyncUpload::upload(): Starting.');
     if ($_SERVER['REQUEST_METHOD'] != 'POST') {
         status_header(404);
         die;
     }
     header('Content-Type: text/html; charset=' . get_option('blog_charset'));
     send_nosniff_header();
     nocache_headers();
     status_header(200);
     // If the file is bigger than the server can accept then the form_id might not arrive.
     // This might happen if the file is bigger than the max post size ini setting.
     // Validation in the browser reduces the risk of this happening.
     if (!isset($_REQUEST['form_id'])) {
         GFCommon::log_debug('GFAsyncUpload::upload(): File upload aborted because the form_id was not found. The file may have been bigger than the max post size ini setting.');
         self::die_error(500, __('Failed to upload file.', 'gravityforms'));
     }
     $form_id = absint($_REQUEST['form_id']);
     $form_unique_id = rgpost('gform_unique_id');
     $form = GFAPI::get_form($form_id);
     if (empty($form) || !$form['is_active']) {
         die;
     }
     if (rgar($form, 'requireLogin')) {
         if (!is_user_logged_in()) {
             die;
         }
         check_admin_referer('gform_file_upload_' . $form_id, '_gform_file_upload_nonce_' . $form_id);
     }
     if (!ctype_alnum($form_unique_id)) {
         die;
     }
     $target_dir = GFFormsModel::get_upload_path($form_id) . DIRECTORY_SEPARATOR . 'tmp' . DIRECTORY_SEPARATOR;
     if (!is_dir($target_dir)) {
         if (!wp_mkdir_p($target_dir)) {
             GFCommon::log_debug("GFAsyncUpload::upload(): Couldn't create the tmp folder: " . $target_dir);
             self::die_error(500, __('Failed to upload file.', 'gravityforms'));
         }
     }
     $time = current_time('mysql');
     $y = substr($time, 0, 4);
     $m = substr($time, 5, 2);
     //adding index.html files to all subfolders
     if (!file_exists(GFFormsModel::get_upload_root() . '/index.html')) {
         GFForms::add_security_files();
     } else {
         if (!file_exists(GFFormsModel::get_upload_path($form_id) . '/index.html')) {
             GFCommon::recursive_add_index_file(GFFormsModel::get_upload_path($form_id));
         } else {
             if (!file_exists(GFFormsModel::get_upload_path($form_id) . "/{$y}/index.html")) {
                 GFCommon::recursive_add_index_file(GFFormsModel::get_upload_path($form_id) . "/{$y}");
             } else {
                 GFCommon::recursive_add_index_file(GFFormsModel::get_upload_path($form_id) . "/{$y}/{$m}");
             }
         }
     }
     if (!file_exists($target_dir . '/index.html')) {
         GFCommon::recursive_add_index_file($target_dir);
     }
     $uploaded_filename = $_FILES['file']['name'];
     $file_name = isset($_REQUEST['name']) ? $_REQUEST['name'] : '';
     $field_id = rgpost('field_id');
     $field_id = absint($field_id);
     $field = GFFormsModel::get_field($form, $field_id);
     if (empty($field) || GFFormsModel::get_input_type($field) != 'fileupload') {
         die;
     }
     $file_name = sanitize_file_name($file_name);
     $uploaded_filename = sanitize_file_name($uploaded_filename);
     $allowed_extensions = !empty($field->allowedExtensions) ? GFCommon::clean_extensions(explode(',', strtolower($field->allowedExtensions))) : array();
     $max_upload_size_in_bytes = $field->maxFileSize > 0 ? $field->maxFileSize * 1048576 : wp_max_upload_size();
     $max_upload_size_in_mb = $max_upload_size_in_bytes / 1048576;
     if ($_FILES['file']['size'] > 0 && $_FILES['file']['size'] > $max_upload_size_in_bytes) {
         self::die_error(104, sprintf(__('File exceeds size limit. Maximum file size: %dMB', 'gravityforms'), $max_upload_size_in_mb));
     }
     if (GFCommon::file_name_has_disallowed_extension($file_name) || GFCommon::file_name_has_disallowed_extension($uploaded_filename)) {
         GFCommon::log_debug("GFAsyncUpload::upload(): Illegal file extension: {$file_name}");
         self::die_error(104, __('The uploaded file type is not allowed.', 'gravityforms'));
     }
     if (!empty($allowed_extensions)) {
         if (!GFCommon::match_file_extension($file_name, $allowed_extensions) || !GFCommon::match_file_extension($uploaded_filename, $allowed_extensions)) {
             GFCommon::log_debug("GFAsyncUpload::upload(): The uploaded file type is not allowed: {$file_name}");
             self::die_error(104, sprintf(__('The uploaded file type is not allowed. Must be one of the following: %s', 'gravityforms'), strtolower($field['allowedExtensions'])));
         }
     }
     $whitelisting_disabled = apply_filters('gform_file_upload_whitelisting_disabled', false);
     if (empty($allowed_extensions) && !$whitelisting_disabled) {
         // Whitelist the file type
         $valid_uploaded_filename = GFCommon::check_type_and_ext($_FILES['file'], $uploaded_filename);
         if (is_wp_error($valid_uploaded_filename)) {
             self::die_error($valid_uploaded_filename->get_error_code(), $valid_uploaded_filename->get_error_message());
         }
         $valid_file_name = GFCommon::check_type_and_ext($_FILES['file'], $file_name);
         if (is_wp_error($valid_uploaded_filename)) {
             self::die_error($valid_file_name->get_error_code(), $valid_file_name->get_error_message());
         }
     }
     $tmp_file_name = $form_unique_id . '_input_' . $field_id . '_' . $file_name;
     $tmp_file_name = sanitize_file_name($tmp_file_name);
//.........這裏部分代碼省略.........