import type { RouteInfo } from '../middleware/middleware-configuration.interface.js';
/**
 * Options for `app.enableCsrfProtection()`.
 *
 * The protection is based on Fetch Metadata (`Sec-Fetch-Site`) with an
 * `Origin`/`Host` fallback, following the algorithm of Go's
 * `net/http.CrossOriginProtection`. It is not a token scheme: it relies on the
 * browser telling the server where a request comes from, which every
 * evergreen browser does since 2023.
 *
 * Browsers only send `Sec-Fetch-Site` to secure origins (HTTPS or
 * `localhost`). Otherwise the `Origin` header is compared with the `Host`
 * header the server receives (`X-Forwarded-Host` is ignored). Behind a proxy
 * that rewrites `Host`, preserve it, or list the public origin in
 * `trustedOrigins`.
 *
 * @publicApi
 */
export interface CsrfProtectionOptions<TRequest = any> {
    /**
     * Origins that may send cross-origin, state-changing requests, e.g.
     * `https://admin.example.com`. Each entry must be a serialized origin:
     * `scheme://host[:port]`, without a path, query string, fragment or
     * wildcard. Entries are normalized the way browsers serialize `Origin`
     * (lower-case, without the default port), and a request is exempt when its
     * `Origin` header equals one of them.
     *
     * Origins allowed by CORS are not trusted implicitly: list them here too.
     */
    trustedOrigins?: string[];
    /**
     * Requests that skip the protection altogether (for example webhook
     * endpoints called by third-party servers that send a foreign `Origin`).
     *
     * Either a list of routes, or a predicate receiving the platform request
     * object. Only consulted for requests that would otherwise be rejected.
     *
     * Routes are declared like `MiddlewareConsumer.exclude()`: a path, or
     * `{ path, method, version? }` to narrow by method (and URI version),
     * without the global prefix, which is added unless the route is excluded
     * from it. Unlike `exclude()`, the match is exact: case-sensitive, without
     * an optional trailing slash, and never for non-canonical request paths
     * (`//`, dot segments, `;`, encoded `/` or `.`), which a router could
     * resolve to a route that is not excluded.
     */
    exclude?: (string | RouteInfo)[] | ((request: TRequest) => boolean);
}