Cache CORS responses, to half the requests involved in basically everything

Author: pimterry

src/httptoolkit-server.ts

@@ -180,7 +180,10 @@ export class HttpToolkitServer extends events.EventEmitter {
             // and override the port from 4000 to something less likely to conflict.
             port: { port: 45457, host: '127.0.0.1' },
             playground: false,
-            cors: { origin: ALLOWED_ORIGINS }
+            cors: {
+                origin: ALLOWED_ORIGINS,
+                maxAge: 86400 // Cache this result for as long as possible
+            }
         });
     }
 };

src/index.ts

@@ -70,7 +70,10 @@ export async function runHTK(options: {
             cors: false,
             https: httpsConfig
         },
-        corsOptions: { origin: ALLOWED_ORIGINS }
+        corsOptions: {
+            origin: ALLOWED_ORIGINS,
+            maxAge: 86400 // Cache this result for as long as possible
+        }
     });
     standalone.start({
         port: 45456,