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ApolloServer.ts
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ApolloServer.ts
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import {
ApolloServer as ApolloServerExpress,
GetMiddlewareOptions,
} from 'apollo-server-express';
import express from 'express';
export interface CreateHandlerOptions {
expressAppFromMiddleware?: (
middleware: express.RequestHandler,
) => express.Application;
expressGetMiddlewareOptions?: GetMiddlewareOptions;
}
function defaultExpressAppFromMiddleware(
middleware: express.RequestHandler,
): express.Handler {
const app = express();
app.use(middleware);
return app;
}
export class ApolloServer extends ApolloServerExpress {
protected override serverlessFramework(): boolean {
return true;
}
public createHandler(options?: CreateHandlerOptions): express.Handler {
let realHandler: express.Handler;
return async (req, ...args) => {
await this.ensureStarted();
if (!realHandler) {
const middleware = this.getMiddleware(
// By default, serverless integrations serve on root rather than
// /graphql, since serverless handlers tend to just do one thing and
// paths are generally configured as part of deploying the app.
{
path: '/',
...options?.expressGetMiddlewareOptions,
},
);
realHandler = (
options?.expressAppFromMiddleware ?? defaultExpressAppFromMiddleware
)(middleware);
}
return realHandler(req, ...args);
};
}
}