Write debug log to tempDir, redirect + download w/ readfile()

ajax/system/sys_debug.php

@@ -8,7 +8,16 @@ if (isset($_POST['csrf_token'])) {
         handleInvalidCSRFToken();
     }
     exec( RASPI_CONFIG.'/system/debuglog.sh', $return);
-    echo json_encode(end($return));
+
+    $logOutput = implode(PHP_EOL, $return);
+    $filename = "raspap_debug.log";
+    $tempDir = sys_get_temp_dir();
+    $filePath = $tempDir . DIRECTORY_SEPARATOR . $filename;
+    $handle = fopen($filePath, "w");
+    fwrite($handle, $logOutput);
+    fclose($handle);
+    echo json_encode($filePath);
+
 } else {
     handleInvalidCSRFToken();
 }

ajax/system/sys_get_logfile.php

@@ -0,0 +1,21 @@
+<?php 
+
+require '../../includes/csrf.php';
+
+$filePath = $_GET['filePath'];
+$filename = "raspap_debug.log";
+
+if (isset($filePath) && strpos($filePath, $filename) !== false) {
+    header('Content-Type: application/octet-stream');
+    header('Content-Disposition: attachment; filename='.basename($filePath));
+    header('Expires: 0');
+    header('Cache-Control: must-revalidate');
+    header('Pragma: public');
+    header('Content-Length: '.filesize($filePath));
+    readfile($filePath);
+    exit();
+} else {
+    header('Location: '.'/system_info');
+    exit();
+}
+