Upgrade Apollo Server to v4 and migrate from micro to Express

[Copilot]

Upgrades Apollo Server from v3 to v4 and replaces micro/microrouter with Express. Implements serverless support using @as-integrations/aws-lambda.

Package changes

• Add @apollo/[email protected], [email protected], [email protected], @as-integrations/[email protected]
• Remove apollo-server-{core,lambda,micro}, micro, microrouter, apollo-server-plugin-http-headers

Server (src/server.js)

Replaced micro with Express + http.Server:

// Before: micro wrapper with microrouter
module.exports = micro(attachCorsHeaders(catchError(router(...routes))))

// After: Express app with http.Server for test compatibility
const app = express()
app.use(async (req, res, next) => { /* CORS */ })
app.use('/api', express.json(), async (req, res, next) => {
  await apolloServerStarted
  return expressMiddleware(apolloServer, { context: createExpressContext })(req, res, next)
})
module.exports = http.createServer(app)

Serverless (src/serverless.js)

Migrated to Lambda integration with middleware-based CORS:

// Before: apollo-server-lambda with callback-based CORS
apolloServer.createHandler({ expressGetMiddlewareOptions: { cors: { origin } }})

// After: @as-integrations/aws-lambda with middleware
startServerAndCreateLambdaHandler(
  apolloServer,
  handlers.createAPIGatewayProxyEventV2RequestHandler(),
  { context: createServerlessContext, middleware: [/* CORS */] }
)

Apollo Server v4 API changes

• Created custom httpHeadersPlugin to replace deprecated apollo-server-plugin-http-headers (maintains setCookies/setHeaders in context)
• Updated landing page plugins: ApolloServerPluginLandingPageLocalDefault for dev, ApolloServerPluginLandingPageProductionDefault for prod
• Changed context creators to async functions with destructured parameters: async ({ req }) instead of (integrationContext)
• Updated all type definitions to import gql from graphql-tag instead of apollo-server-micro

Note on versioning

Using Apollo Server v4 (not v5) as @as-integrations/aws-lambda currently only supports v4.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fastdl.mongodb.org
  • Triggering command: node ./postinstall.js (dns block)
  • Triggering command: node /home/REDACTED/work/Ackee/Ackee/node_modules/.bin/ava (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Upgrade Apollo Server (now named @apollo/server) to the latest version. Remove apollo-server-core, apollo-server-lambda and apollo-server-micro, micro, microrouter. Use express and @as-integrations/express5 instead of micro. Ensure that the serverless part still works as it required a new implementation as apollo-server-lambda has been removed.

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Project	Deployment	Preview	Comments	Updated (UTC)
ackee	Ready	Preview	Comment	Nov 10, 2025 7:16am