diff --git a/public/api/graph_upload.php b/public/api/graph_upload.php
index e686395..41b51e2 100644
--- a/public/api/graph_upload.php
+++ b/public/api/graph_upload.php
@@ -2,10 +2,13 @@
 declare(strict_types=1);
 require_once __DIR__ . '/../../src/bootstrap.php';
 
-$raw = file_get_contents('php://input');
-if ($raw === false || $raw === '') {
+$raw = read_crash_upload_body();
+if ($raw === null) {
     json_out(['ok' => false, 'error' => 'empty body'], 400);
 }
+if ($raw === false) {
+    json_out(['ok' => false, 'error' => 'invalid gzip body'], 400);
+}
 $data = json_decode($raw, true);
 if (!is_array($data)) {
     json_out(['ok' => false, 'error' => 'invalid json'], 400);