From 9112b6c1f1ef6def9b1dc83f18276d9cbd24046b Mon Sep 17 00:00:00 2001
From: Josh Dover <me@joshdover.com>
Date: Thu, 30 Apr 2020 10:32:26 -0600
Subject: [PATCH] Avoid race condition between HttpServer.stop() and
 HttpServerSetup methods (#64487)

---
 src/core/server/http/http_server.test.ts | 58 ++++++++++++++++++++++++
 src/core/server/http/http_server.ts      | 28 +++++++++++-
 2 files changed, 85 insertions(+), 1 deletion(-)

diff --git a/src/core/server/http/http_server.test.ts b/src/core/server/http/http_server.test.ts
index 27db79bb94d2..4fb433b5c77b 100644
--- a/src/core/server/http/http_server.test.ts
+++ b/src/core/server/http/http_server.test.ts
@@ -1068,6 +1068,14 @@ describe('setup contract', () => {
       await create();
       expect(create()).rejects.toThrowError('A cookieSessionStorageFactory was already created');
     });
+
+    it('does not throw if called after stop', async () => {
+      const { createCookieSessionStorageFactory } = await server.setup(config);
+      await server.stop();
+      expect(() => {
+        createCookieSessionStorageFactory(cookieOptions);
+      }).not.toThrow();
+    });
   });
 
   describe('#isTlsEnabled', () => {
@@ -1113,4 +1121,54 @@ describe('setup contract', () => {
       expect(getServerInfo().protocol).toEqual('https');
     });
   });
+
+  describe('#registerStaticDir', () => {
+    it('does not throw if called after stop', async () => {
+      const { registerStaticDir } = await server.setup(config);
+      await server.stop();
+      expect(() => {
+        registerStaticDir('/path1/{path*}', '/path/to/resource');
+      }).not.toThrow();
+    });
+  });
+
+  describe('#registerOnPreAuth', () => {
+    test('does not throw if called after stop', async () => {
+      const { registerOnPreAuth } = await server.setup(config);
+      await server.stop();
+      expect(() => {
+        registerOnPreAuth((req, res) => res.unauthorized());
+      }).not.toThrow();
+    });
+  });
+
+  describe('#registerOnPostAuth', () => {
+    test('does not throw if called after stop', async () => {
+      const { registerOnPostAuth } = await server.setup(config);
+      await server.stop();
+      expect(() => {
+        registerOnPostAuth((req, res) => res.unauthorized());
+      }).not.toThrow();
+    });
+  });
+
+  describe('#registerOnPreResponse', () => {
+    test('does not throw if called after stop', async () => {
+      const { registerOnPreResponse } = await server.setup(config);
+      await server.stop();
+      expect(() => {
+        registerOnPreResponse((req, res, t) => t.next());
+      }).not.toThrow();
+    });
+  });
+
+  describe('#registerAuth', () => {
+    test('does not throw if called after stop', async () => {
+      const { registerAuth } = await server.setup(config);
+      await server.stop();
+      expect(() => {
+        registerAuth((req, res) => res.unauthorized());
+      }).not.toThrow();
+    });
+  });
 });
diff --git a/src/core/server/http/http_server.ts b/src/core/server/http/http_server.ts
index 77d3d99fb48c..92ac5220735a 100644
--- a/src/core/server/http/http_server.ts
+++ b/src/core/server/http/http_server.ts
@@ -74,6 +74,7 @@ export class HttpServer {
   private registeredRouters = new Set<IRouter>();
   private authRegistered = false;
   private cookieSessionStorageCreated = false;
+  private stopped = false;
 
   private readonly log: Logger;
   private readonly authState: AuthStateStorage;
@@ -144,6 +145,10 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Http server is not setup up yet');
     }
+    if (this.stopped) {
+      this.log.warn(`start called after stop`);
+      return;
+    }
     this.log.debug('starting http server');
 
     for (const router of this.registeredRouters) {
@@ -189,13 +194,13 @@ export class HttpServer {
   }
 
   public async stop() {
+    this.stopped = true;
     if (this.server === undefined) {
       return;
     }
 
     this.log.debug('stopping http server');
     await this.server.stop();
-    this.server = undefined;
   }
 
   private getAuthOption(
@@ -234,6 +239,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Server is not created yet');
     }
+    if (this.stopped) {
+      this.log.warn(`setupConditionalCompression called after stop`);
+    }
 
     const { enabled, referrerWhitelist: list } = config.compression;
     if (!enabled) {
@@ -261,6 +269,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Server is not created yet');
     }
+    if (this.stopped) {
+      this.log.warn(`registerOnPostAuth called after stop`);
+    }
 
     this.server.ext('onPostAuth', adoptToHapiOnPostAuthFormat(fn, this.log));
   }
@@ -269,6 +280,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Server is not created yet');
     }
+    if (this.stopped) {
+      this.log.warn(`registerOnPreAuth called after stop`);
+    }
 
     this.server.ext('onRequest', adoptToHapiOnPreAuthFormat(fn, this.log));
   }
@@ -277,6 +291,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Server is not created yet');
     }
+    if (this.stopped) {
+      this.log.warn(`registerOnPreResponse called after stop`);
+    }
 
     this.server.ext('onPreResponse', adoptToHapiOnPreResponseFormat(fn, this.log));
   }
@@ -288,6 +305,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Server is not created yet');
     }
+    if (this.stopped) {
+      this.log.warn(`createCookieSessionStorageFactory called after stop`);
+    }
     if (this.cookieSessionStorageCreated) {
       throw new Error('A cookieSessionStorageFactory was already created');
     }
@@ -305,6 +325,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Server is not created yet');
     }
+    if (this.stopped) {
+      this.log.warn(`registerAuth called after stop`);
+    }
     if (this.authRegistered) {
       throw new Error('Auth interceptor was already registered');
     }
@@ -348,6 +371,9 @@ export class HttpServer {
     if (this.server === undefined) {
       throw new Error('Http server is not setup up yet');
     }
+    if (this.stopped) {
+      this.log.warn(`registerStaticDir called after stop`);
+    }
 
     this.server.route({
       path,