Update getResponseBody.hbs

Make it possible to return blob type.

Author: tomohisa

src/templates/core/node/getResponseBody.hbs

@@ -3,8 +3,13 @@ async function getResponseBody(response: Response): Promise<any> {
         const contentType = response.headers.get('Content-Type');
         if (contentType) {
             const isJSON = contentType.toLowerCase().startsWith('application/json');
+            const isBlob = contentType.toLowerCase().startsWith('image/')
+                    || contentType.toLowerCase().startsWith('application/pdf')
+                    || contentType.toLowerCase().startsWith('application/zip');
             if (isJSON) {
-                return await response.json();
+                 return await response.json();
+            } else if (isBlob) {
+                 return await response.blob();
             } else {
                 return await response.text();
             }