agentic-studio/network-poc/frontend/node_modules/astro/dist/vite-plugin-astro-server/sec-fetch.js

import { BaseApp } from "../core/app/base.js";
function secFetchMiddleware(logger, allowedDomains) {
  return function devSecFetch(req, res, next) {
    const secFetchSite = req.headers["sec-fetch-site"];
    const secFetchMode = req.headers["sec-fetch-mode"];
    if (!secFetchSite) {
      return next();
    }
    if (secFetchSite === "same-origin" || secFetchSite === "same-site" || secFetchSite === "none") {
      return next();
    }
    if (secFetchMode === "navigate" || secFetchMode === "nested-navigate") {
      return next();
    }
    if (secFetchMode === "websocket") {
      return next();
    }
    const origin = req.headers["origin"];
    if (typeof origin === "string") {
      try {
        const originUrl = new URL(origin);
        const protocol = originUrl.protocol.slice(0, -1);
        if (BaseApp.validateForwardedHost(originUrl.host, allowedDomains, protocol)) {
          return next();
        }
      } catch {
      }
    }
    logger.warn(
      "router",
      `Blocked cross-origin request to ${req.url} (Sec-Fetch-Site: ${secFetchSite}, Sec-Fetch-Mode: ${secFetchMode}). Cross-origin subresource requests are not allowed on the dev server for security reasons.`
    );
    res.statusCode = 403;
    res.setHeader("Content-Type", "text/plain");
    res.end("Cross-origin request blocked");
  };
}
export {
  secFetchMiddleware
};