import type { Handler } from 'express';
/**
 * Options for {@link HttpRouterService.addAuthPolicy}.
 *
 * @public
 */
export interface HttpRouterServiceAuthPolicy {
    path: string;
    allow: 'unauthenticated' | 'user-cookie';
}
/**
 * Allows plugins to register HTTP routes.
 *
 * See the {@link https://backstage.io/docs/backend-system/core-services/http-router | service documentation} for more details.
 *
 * @public
 */
export interface HttpRouterService {
    /**
     * Registers an Express request handler under the plugin's base router. This
     * typically makes its base path `/api/<plugin-id>`.
     */
    use(handler: Handler): void;
    /**
     * Adds an auth policy to the router. This is used to allow unauthenticated or
     * cookie based access to parts of a plugin's API.
     *
     * @remarks
     *
     * The paths given follow the same pattern as the routers given to the `use`
     * method, that is, they are relative to the plugin's base URL, and can
     * contain placeholders.
     *
     * @example
     *
     * ```ts
     * http.addAuthPolicy({
     *   path: '/static/:id',
     *   allow: 'user-cookie',
     * });
     * ```
     *
     * This allows limited access tokens via cookies on the
     * `/api/<plugin-id>/static/*` paths, but not unauthenticated access.
     */
    addAuthPolicy(policy: HttpRouterServiceAuthPolicy): void;
}