Allow additional Hapi route options to be passed

CHANGELOG.md

@@ -4,6 +4,7 @@ All of the packages in the `apollo-server` repo are released with the same versi
 
 ### vNEXT
 
+- Hapi: Allow additional route options to be passed to Hapi.js plugin. [PR #1384](https://github.com/apollographql/apollo-server/pull/1384)
 - express, koa: remove next after playground [#1436](https://github.com/apollographql/apollo-server/pull/1436)
 - Hapi: Pass the response toolkit to the context function. [#1407](https://github.com/apollographql/apollo-server/pull/1407)
 - update apollo-engine-reporting-protobuf to non-beta [#1429](https://github.com/apollographql/apollo-server/pull/1429)

packages/apollo-server-hapi/src/ApolloServer.ts

@@ -49,6 +49,7 @@ export class ApolloServer extends ApolloServerBase {
     app,
     cors,
     path,
+    route,
     disableHealthCheck,
     onHealthCheck,
   }: ServerRegistration) {
@@ -122,9 +123,12 @@ export class ApolloServer extends ApolloServerBase {
       options: {
         path,
         graphqlOptions: this.createGraphQLServerOptions.bind(this),
-        route: {
-          cors: cors !== undefined ? cors : true,
-        },
+        route:
+          route !== undefined
+            ? route
+            : {
+                cors: cors !== undefined ? cors : true,
+              },
       },
     });
 
@@ -136,6 +140,7 @@ export interface ServerRegistration {
   app?: hapi.Server;
   path?: string;
   cors?: boolean | hapi.RouteOptionsCors;
+  route?: hapi.RouteOptions;
   onHealthCheck?: (request: hapi.Request) => Promise<any>;
   disableHealthCheck?: boolean;
   uploads?: boolean | Record<string, any>;

packages/apollo-server-hapi/src/__tests__/ApolloServer.test.ts

@@ -232,6 +232,50 @@ describe('apollo-server-hapi', () => {
       await apolloFetch({ query: '{hello}' });
     });
 
+    it('accepts custom route configuration', async () => {
+      server = new ApolloServer({
+        typeDefs,
+        resolvers,
+      });
+      app = new Server({
+        port,
+      });
+
+      await server.applyMiddleware({
+        app,
+        route: {
+          cors: {
+            additionalExposedHeaders: ['X-Apollo'],
+            exposedHeaders: [
+              'Accept',
+              'Authorization',
+              'Content-Type',
+              'If-None-Match',
+              'Another-One',
+            ],
+          },
+        },
+      });
+
+      await app.start();
+
+      httpServer = app.listener;
+      const uri = app.info.uri + '/graphql';
+
+      const apolloFetch = createApolloFetch({ uri }).useAfter(
+        (response, next) => {
+          expect(
+            response.response.headers.get('access-control-expose-headers'),
+          ).toEqual(
+            'Accept,Authorization,Content-Type,If-None-Match,Another-One,X-Apollo',
+          );
+          next();
+        },
+      );
+
+      await apolloFetch({ query: '{hello}' });
+    });
+
     it('passes each request and response toolkit through to the context function', async () => {
       const context = async ({ request, h }) => {
         expect(request).toBeDefined();