Automated Build Hash updates

dapper_backup.php

@@ -321,51 +321,56 @@ add_action('admin_post_dapper_backup_dl', 'dapper_handle_backup_download');
 
 function dapper_handle_backup_download() {
     if (!current_user_can('manage_options')) {
-        wp_die('Access denied.');
+        wp_die('Access denied.', 403);
     }
 
-    $file   = isset($_GET['f']) ? basename($_GET['f']) : '';
+    $file   = isset($_GET['f'])      ? basename($_GET['f']) : '';
     $folder = isset($_GET['folder']) ? basename($_GET['folder']) : '';
     $nonce  = $_GET['_wpnonce'] ?? '';
 
     if (!wp_verify_nonce($nonce, 'dapper_dl_' . md5($file))) {
-        wp_die('Security check failed.');
+        wp_die('Security check failed.', 403);
     }
 
     $path = DAPPER_BACKUP_BASE_DIR . '/' . $folder . '/' . $file;
     if (!file_exists($path) || !is_readable($path)) {
-        wp_die('File not found or inaccessible.');
+        wp_die('File not found or not readable.', 404);
     }
 
-    // Disable output buffering & compression for large files
-    if (ob_get_level()) ob_end_clean();
-    header_remove('Content-Encoding'); // Prevent gzip
+    // Kill all output buffering
+    while (ob_get_level() > 0) {
+        ob_end_clean();
+    }
 
-    // Proper headers for binary download
+    // Turn off compression
+    if (function_exists('apache_setenv')) {
+        @apache_setenv('no-gzip', 1);
+    }
+    @ini_set('zlib.output_compression', 'Off');
+
+    // Headers
     header('Content-Description: File Transfer');
-    header('Content-Type: application/zip'); // Force zip type
-    header('Content-Disposition: attachment; filename="' . $file . '"');
-    header('Content-Transfer-Encoding: binary');
+    header('Content-Type: application/zip');
+    header('Content-Disposition: attachment; filename="' . $file . '";');
     header('Expires: 0');
-    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
+    header('Cache-Control: must-revalidate');
     header('Pragma: public');
-
-    // Chunked output to avoid memory issues
     header('Content-Length: ' . filesize($path));
 
-    // Stream file in 1 MB chunks
-    $chunk_size = 1024 * 1024; // 1 MB
-    $handle = fopen($path, 'rb');
+    // Chunked read — very memory efficient
+    $chunk = 1 * 1024 * 1024; // 1 MB
+    $handle = @fopen($path, 'rb');
     if ($handle === false) {
-        wp_die('Failed to open file for reading.');
+        wp_die('Cannot open file for reading.');
     }
 
     while (!feof($handle)) {
-        echo fread($handle, $chunk_size);
-        flush(); // Send chunk immediately
+        echo @fread($handle, $chunk);
+        flush();
+        if (connection_aborted()) break;
     }
 
-    fclose($handle);
+    @fclose($handle);
     exit;
 }