Only attempt to parse chunks when data is found

Author: daniel-ac-martin

lib/provider/aws/format-response.js

@@ -35,15 +35,18 @@ module.exports = (event, response, options) => {
     delete headers['transfer-encoding'];
 
     const raw = Response.body(response).toString().split('\r\n');
-    const parsed = [];
-    for (let i = 0; i < raw.length; i +=2) {
-      const size = parseInt(raw[i], 16);
-      const value = raw[i + 1];
-      if (value) {
-        parsed.push(value.substring(0, size));
+
+    if (raw.length > 1) {
+      const parsed = [];
+      for (let i = 0; i < raw.length; i +=2) {
+        const size = parseInt(raw[i], 16);
+        const value = raw[i + 1];
+        if (value) {
+          parsed.push(value.substring(0, size));
+        }
       }
+      body = parsed.join('');
     }
-    body = parsed.join('')
   }
 
   if (eventType === LAMBDA_EVENT_TYPES.ALB) {