astro/dist/core/i18n/error-fallback.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

import { REROUTABLE_STATUS_CODES } from "../constants.js";
import { renderErrorFromState } from "../errors/handler.js";
import { finalizeI18n } from "./handler.js";
/**
* Runs {@link finalizeI18n} and, when it replaces the response with a
* null-body 404/500 (e.g. a locale-less path under `pathname-prefix-always`),
* renders the error page for it — the reroute `handleRequest` performs after
* `finalizeI18n` on the standard path. Responses passed through unchanged
* are returned as-is.
*
* Used by the composable `astro/fetch` `i18n()` entry point, where there is
* no surrounding `handleRequest` to supply this fallback. Kept out of
* `handler.ts` because that module is reachable from the client-importable
* `astro:i18n` virtual module, which must not pull in error-page rendering.
*/
export async function handleI18nWithErrorFallback(compiled, state, response) {
	const result = await finalizeI18n(compiled, state, response);
	if (result !== response && result.body === null && REROUTABLE_STATUS_CODES.includes(result.status) && !state.skipErrorReroute) {
		return renderErrorFromState(state, state.request, {
			...state.renderOptions,
			response: result,
			status: result.status,
			error: result.status === 500 ? null : undefined,
			pathname: state.pathname
		});
	}
	return result;
}