Function getParametrizedRoute

packages/astro/src/server/middleware.ts:421–452

(
  ctx: Parameters<MiddlewareResponseHandler>[0] & { routePattern?: string },
)

}

function getParametrizedRoute(
  ctx: Parameters<MiddlewareResponseHandler>[0] & { routePattern?: string },
): string | undefined {
  try {
    // `routePattern` is available after Astro 5
    const contextWithRoutePattern = ctx;
    const rawRoutePattern = contextWithRoutePattern.routePattern;

    const routesFromManifest =
      // @ts-expect-error Implicit any on Symbol.for (This is available in Astro 5)
      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
      ctx?.[Symbol.for('context.routes')]?.manifest?.routes ??
      // @ts-expect-error Implicit any on Symbol.for (This is available in Astro 6)
      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
      ctx?.[Symbol.for('astro.pipeline')]?.manifest?.routes;

    // oxlint-disable-next-line typescript/no-unsafe-member-access
    const matchedRouteSegmentsFromManifest = routesFromManifest?.find(
      (route: { routeData?: { route?: string } }) => route?.routeData?.route === rawRoutePattern,
      // oxlint-disable-next-line typescript/no-unsafe-member-access
    )?.routeData?.segments;

    return (
      // Astro v5+ - Joining the segments to get the correct casing of the parametrized route
      (matchedRouteSegmentsFromManifest && joinRouteSegments(matchedRouteSegmentsFromManifest)) ||
      // Fallback (Astro v4 and earlier)
      interpolateRouteFromUrlAndParams(ctx.url.pathname, ctx.params)
    );
  } catch {
    return undefined;
  }
}

function injectMetaTagsInResponse(originalResponse: Response, metaTagsStr: string): Response {
  try {