Function upstreamErrorResponse

apps/websim/worker.js:322–343

(upstream)

}

async function upstreamErrorResponse(upstream) {
    const upstreamStatus = upstream?.status || 502;
    const status =
        upstreamStatus >= 400 && upstreamStatus < 500 ? upstreamStatus : 502;
    const detail = upstream ? await readResponsePreview(upstream, 4096) : "";

    return new Response(
        renderErrorPage(
            `Upstream error ${upstreamStatus}`,
            detail ||
                "The Pollinations text API did not return generated HTML for this request.",
        ),
        {
            status,
            headers: {
                "Content-Type": "text/html; charset=utf-8",
                "Cache-Control": "no-store",
                ...getCorsHeaders(),
            },
        },
    );
}

async function readResponsePreview(response, maxChars) {
    if (!response.body) return "";