wikipedia-game-solver/apps/api/app/middleware/force_json_response_middleware.ts

import type { HttpContext } from "@adonisjs/core/http"
import type { NextFn } from "@adonisjs/core/types/http"

/**
 * Updating the "Accept" header to always accept "application/json" response from the server. This will force the internals of the framework like validator errors or auth errors to return a JSON response.
 */
export default class ForceJsonResponseMiddleware {
  public async handle({ request }: HttpContext, next: NextFn) {
    const headers = request.headers()
    headers.accept = "application/json"

    return next()
  }
}