Function fetch

src/worker.ts:271–303

(request: Request, env: Env, ctx: ExecutionContext)

export default {
  async fetch(request: Request, env: Env, ctx: ExecutionContext) {
    try {
      return await app.fetch(request, env, ctx);
    } catch (err) {
      console.error(err);
      const e = err as Error;
      console.log(`Ouch, that error hurt so much Sentry couldn't catch it`);
      console.log(e.stack);
      let errorCode = 500;
      if (e.name === 'AbortError') {
        errorCode = 504;
      }
      /* We return it as a 200 so embedded applications can display the error */
      if (request.headers.get('user-agent')?.match(embeddingClientRegex)) {
        errorCode = 200;
      }
      const branding = getBranding(request);

      return new Response(
        e.name === 'AbortError'
          ? Strings.TIMEOUT_ERROR_HTML.format({ brandingName: branding.name })
          : Strings.ERROR_HTML.format({ brandingName: branding.name }),
        {
          headers: {
            ...Constants.RESPONSE_HEADERS,
            'content-type': 'text/html;charset=utf-8',
            'cache-control': noCache
          },
          status: errorCode
        }
      );
    }
  }
};