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<?php |
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|
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namespace BitCode\BitForm\Core\Util; |
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|
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if (!defined('ABSPATH')) { |
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exit; |
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} |
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|
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final class FileDownloadProvider |
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{ |
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private function isAuthorizedFileRequest($formID, $entryID) |
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{ |
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if (!is_user_logged_in()) { |
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return false; |
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} |
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|
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$currentUserId = get_current_user_id(); |
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if (empty($currentUserId)) { |
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return false; |
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} |
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|
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// If a nonce is provided, verify it. If it's missing/invalid, fall back to an ownership/capability check. |
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$nonce = isset($_GET['nonce']) && is_scalar($_GET['nonce']) ? sanitize_text_field(wp_unslash((string) $_GET['nonce'])) : ''; |
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$nonceAction = 'bitforms_file_download_' . $formID . '_' . $entryID; |
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if (!empty($nonce) && wp_verify_nonce($nonce, $nonceAction)) { |
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return true; |
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} |
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|
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// Capability bypass. |
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if (current_user_can('manage_bitform') || current_user_can('manage_options')) { |
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return true; |
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} |
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|
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// Ownership check: non-admin users may only download their own entry files. |
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$entryModel = new \BitCode\BitForm\Core\Database\FormEntryModel(); |
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$entry = $entryModel->get( |
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'id', |
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[ |
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'id' => $entryID, |
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'form_id' => $formID, |
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'user_id' => $currentUserId, |
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] |
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); |
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|
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return !is_wp_error($entry) && !empty($entry); |
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} |
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|
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public function register() |
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{ |
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add_action('template_redirect', [$this, 'authCheckandFrceDownloadHelper']); |
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add_shortcode('bitforms-frontend-file', [$this, 'handleFileDownload']); |
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} |
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|
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public function handleFileDownload() |
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{ |
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// File download: form/entry/file IDs read from query string; authorization enforced via isAuthorizedFileRequest() below. |
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if (!isset($_GET['formID']) || !isset($_GET['entryID']) || !isset($_GET['fileID'])) { |
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global $wp_query; |
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$wp_query->set_404(); |
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status_header(404); |
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get_template_part(404); |
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exit(); |
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} |
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$formID = intval(sanitize_text_field(wp_unslash($_GET['formID']))); |
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$entryID = intval(sanitize_text_field(wp_unslash($_GET['entryID']))); |
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$fileID = sanitize_file_name(wp_unslash($_GET['fileID'])); |
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if (!$this->isAuthorizedFileRequest($formID, $entryID)) { |
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$this->show404(); |
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} |
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|
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$filePath = FileHandler::getEntriesFileUploadDir($formID, $entryID) . DIRECTORY_SEPARATOR . $fileID; |
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|
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if (is_readable($filePath)) { |
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$this->fileDownloadORView($filePath, true); |
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} else { |
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$this->show404(); |
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} |
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} |
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|
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public static function getBaseDownloadURL() |
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{ |
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$routes = get_option('bitforms_routes'); |
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if (isset($routes['file'])) { |
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$file_page = get_post($routes['file']); |
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if (empty($file_page)) { |
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$file_route_id = wp_insert_post( |
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[ |
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'post_name' => 'bitforms-file', |
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'comment_status' => 'closed', |
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'ping_status' => 'closed', |
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'post_content' => '<!-- wp:shortcode -->[bitforms-frontend-file /]<!-- /wp:shortcode -->', |
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'post_status' => 'publish', |
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'post_type' => 'bitforms' |
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] |
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); |
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$routes['file'] = $file_route_id; |
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update_option('bitforms_routes', $routes); |
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$file_page_slug = get_post_permalink($file_route_id); |
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} else { |
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$file_page_slug = get_post_permalink($file_page->ID); |
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} |
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} else { |
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$file_route_id = wp_insert_post( |
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[ |
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'post_name' => 'bitforms-file', |
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'comment_status' => 'closed', |
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'ping_status' => 'closed', |
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'post_content' => '<!-- wp:shortcode -->[bitforms-frontend-file /]<!-- /wp:shortcode -->', |
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'post_status' => 'publish', |
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'post_type' => 'bitforms' |
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] |
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); |
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$route_value = []; |
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$route_value['file'] = $file_route_id; |
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update_option('bitforms_routes', $route_value); |
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$file_page_slug = get_post_permalink($file_route_id); |
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} |
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|
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return $file_page_slug; |
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} |
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|
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public function authCheckandFrceDownloadHelper() |
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{ |
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if (!is_singular('bitforms')) { |
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return; |
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} |
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global $post; |
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if (!empty($post->post_content)) { |
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$shortCodeRegex = get_shortcode_regex(); |
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preg_match_all('/' . $shortCodeRegex . '/', $post->post_content, $regexMatchGroups); |
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if (!empty($regexMatchGroups[2]) && in_array('bitforms-frontend-file', $regexMatchGroups[2]) && is_user_logged_in()) { |
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$file = $this->isRequestedFileExists(); |
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if ($file) { |
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$this->fileDownloadORView($file, isset($_GET['download'])); |
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} else { |
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$this->show404(); |
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} |
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} else { |
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auth_redirect(); |
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} |
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} |
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} |
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|
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private function show404() |
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{ |
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global $wp_query; |
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$wp_query->set_404(); |
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status_header(404); |
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get_template_part(404); |
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exit(); |
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} |
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|
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private function isRequestedFileExists() |
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{ |
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// File download: IDs read from query string; authorization enforced via isAuthorizedFileRequest() below. |
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if (!isset($_GET['formID']) || !isset($_GET['entryID']) || !isset($_GET['fileID'])) { |
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return false; |
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} |
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$formID = intval(sanitize_text_field(wp_unslash($_GET['formID']))); |
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$entryID = intval(sanitize_text_field(wp_unslash($_GET['entryID']))); |
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$fileID = sanitize_file_name(wp_unslash($_GET['fileID'])); |
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|
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if (!$this->isAuthorizedFileRequest($formID, $entryID)) { |
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return false; |
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} |
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|
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$filePath = FileHandler::getEntriesFileUploadDir($formID, $entryID) . DIRECTORY_SEPARATOR . $fileID; |
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if (is_readable($filePath)) { |
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return $filePath; |
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} |
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|
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return false; |
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} |
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|
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private function fileDownloadORView($filePath, $forceDownload = false) |
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{ |
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if ($forceDownload) { |
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header('Content-Type: application/force-download'); |
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header('Content-Type: application/octet-stream'); |
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header('Content-Type: application/download'); |
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header('Content-Disposition: attachment; filename="' . basename($filePath) . '"'); |
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} else { |
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$fileInfo = wp_check_filetype($filePath); |
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$content_types = 'text/plain'; |
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if ($fileInfo['type'] && $fileInfo['ext']) { |
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$content_types = $fileInfo['type']; |
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$ext = $fileInfo['ext']; |
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if (in_array($ext, ['txt', 'php', 'html', 'xhtml', 'json'], true)) { |
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$content_types = 'text/plain'; |
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} |
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} |
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header('Content-Disposition:filename="' . basename($filePath) . '"'); |
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header("Content-Type: $content_types"); |
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} |
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header('Content-Description: File Transfer'); |
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header('Expires: 0'); |
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header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); |
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header('Pragma: public'); |
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header('Content-Length: ' . filesize($filePath)); |
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header('Content-Transfer-Encoding: binary '); |
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flush(); |
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// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_readfile -- Streaming binary download; WP_Filesystem has no streaming equivalent and get_contents() would load entire file into memory. |
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readfile($filePath); |
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die(); |
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} |
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} |
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|
