validate there is a content header before proceeding

sheplol · Jul 21, 2024 · 38d1819 · 38d1819
1 parent 6914877
commit 38d1819
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/uv.sw.js b/src/uv.sw.js
@@ -236,7 +236,7 @@ class UVServiceWorker extends Ultraviolet.EventEmitter {
                         break;
                     case 'iframe':
                     case 'document':
-                        if (responseCtx.getHeader("content-type").startsWith("text/html")) {
+                        if (responseCtx.getHeader("content-type") && responseCtx.getHeader("content-type").startsWith("text/html")) {
                             let modifiedResponse = await response.text();
                             if (Array.isArray(this.config.inject)) {
                                 const headPosition = modifiedResponse.indexOf('</head>');