From 41ad16101119846c1bbdceb212e4d55b474a9f6c Mon Sep 17 00:00:00 2001
From: Binbin <ye.binbin@hotmail.com>
Date: Tue, 9 Jun 2020 09:23:29 +0900
Subject: [PATCH] Add more types to installSubscriptionHandlers

---
 packages/apollo-server-core/src/ApolloServer.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/packages/apollo-server-core/src/ApolloServer.ts b/packages/apollo-server-core/src/ApolloServer.ts
index 4e9bc8dfd18..8b0a4cbbb69 100644
--- a/packages/apollo-server-core/src/ApolloServer.ts
+++ b/packages/apollo-server-core/src/ApolloServer.ts
@@ -3,7 +3,11 @@ import {
   addMockFunctionsToSchema,
   GraphQLParseOptions,
 } from 'graphql-tools';
+import { Server as NetServer } from 'net'
+import { Server as TlsServer } from 'tls'
 import { Server as HttpServer } from 'http';
+import { Http2Server, Http2SecureServer } from 'http2';
+import { Server as HttpsServer } from 'https';
 import loglevel from 'loglevel';
 import {
   execute,
@@ -602,7 +606,7 @@ export class ApolloServerBase {
     }
   }
 
-  public installSubscriptionHandlers(server: HttpServer | WebSocket.Server) {
+  public installSubscriptionHandlers(server: HttpServer | HttpsServer | Http2Server | Http2SecureServer | WebSocket.Server) {
     if (!this.subscriptionServerOptions) {
       if (this.config.gateway) {
         throw Error(
@@ -678,7 +682,7 @@ export class ApolloServerBase {
         keepAlive,
         validationRules: this.requestOptions.validationRules
       },
-      server instanceof HttpServer
+      server instanceof NetServer || server instanceof TlsServer
         ? {
           server,
           path,