How to redirect users when accessing GraphQL playground

[jcubic]

I have simple authentication using express session. But I only found a way to handle an API and throw an error when user is not authenticated in context function.

But how I can redirect users to the login page when session data is missing when accessing playground?

[jcubic]

Ok found that app.use() accepts any number of middlewares, so I can use add my is_admin middleware to the list:

import { Request, Response, NextFunction } from 'express';

export function is_admin(req: Request, res: Response, next: NextFunction) {
    if (!req.session.admin && !DEBUG) {
        return res.redirect(302, `${ADMIN_LOGIN}?next=${next_url(req)}`);
    }
    next();
}

export const start = async (port: number, callback: () => void) => {
    const httpServer = http.createServer(app);
    const server = apollo_server(httpServer);
    await server.start();
    app.use(
        '/api/',
        cors<cors.CorsRequest>({ origin: "*" }),
        json(),
        is_admin,
        expressMiddleware(server, {
            context: create_context
        })
    );
    httpServer.listen({ port }, callback);
};