handle 204 and 304 proxy responses

src/utils/proxies/credentialed.js

@@ -19,6 +19,10 @@ export default async function credentialedProxyHandler(req, res) {
         },
       });
 
+      if (status === 204 || status === 304) {
+        return res.status(status).end();
+      }
+
       if (contentType) res.setHeader("Content-Type", contentType);
       return res.status(status).send(data);
     }

src/utils/proxies/generic.js

@@ -13,6 +13,11 @@ export default async function genericProxyHandler(req, res) {
       const [status, contentType, data] = await httpProxy(url);
 
       if (contentType) res.setHeader("Content-Type", contentType);
+
+      if (status === 204 || status === 304) {
+        return res.status(status).end();
+      }
+
       return res.status(status).send(data);
     }
   }