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TypeScript

import type { RemotePattern } from '@astrojs/internal-helpers/remote';
import type * as vite from 'vite';
import type { AstroLogger } from '../core/logger/core.js';
/**
* Middleware that validates Sec-Fetch metadata headers on incoming requests
* to block cross-origin subresource requests (e.g. `<script>` tags from
* another origin loading dev server modules).
*
* Navigation requests (`Sec-Fetch-Mode: navigate`) are always allowed through
* because browsers enforce their own security model for top-level navigations.
*
* Requests without `Sec-Fetch-Site` (e.g. from non-browser clients like curl,
* or older browsers that don't send Fetch Metadata) are also allowed through
* to avoid breaking legitimate development workflows.
*
* When `security.allowedDomains` is configured, requests whose `Origin` header
* matches one of the allowed patterns are also permitted. This supports proxied
* dev server setups (e.g. ngrok, Cloudflare Tunnel) where the browser sees a
* different origin than the dev server itself.
*/
export declare function secFetchMiddleware(logger: AstroLogger, allowedDomains?: Partial<RemotePattern>[]): vite.Connect.NextHandleFunction;