lib/src/http/kernel/module/PoweredByHeaderInjectionHTTPModule.ts

import {HTTPKernelModule} from '../HTTPKernelModule'
import {Request} from '../../lifecycle/Request'
import {Injectable, Inject} from '../../../di'
import {HTTPKernel} from '../HTTPKernel'
import {Config} from '../../../service/Config'

/**
 * HTTP kernel middleware that sets the `X-Powered-By` header.
 */
@Injectable()
export class PoweredByHeaderInjectionHTTPModule extends HTTPKernelModule {
    public readonly executeWithBlockingWriteback = true

    @Inject()
    protected readonly config!: Config;

    public static register(kernel: HTTPKernel): void {
        kernel.register(this).after()
    }

    public async apply(request: Request): Promise<Request> {
        if ( !this.config.get('server.poweredBy.hide', false) ) {
            request.response.setHeader('X-Powered-By', this.config.get('server.poweredBy.header', 'Extollo'))
            request.response.setHeader('Server', this.config.get('server.poweredBy.header', 'Extollo'))
        }

        return request
    }
}