Function fetch

packages/web/src/server.ts:130–160

(req)

  hostname: "0.0.0.0",
  port: Number(Bun.env.PORT ?? 3000),
  async fetch(req) {
    // Reject WebSocket upgrade requests
    if (req.headers.get("upgrade") === "websocket") {
      return new Response("WebSocket upgrades not supported", {
        status: 426,
        headers: {
          Upgrade: "Required",
        },
      });
    }

    const url = new URL(req.url);
    const rendered = getRenderedPage(url.pathname);
    if (rendered !== undefined) {
      const shellUrl = new URL(url);
      shellUrl.host = `localhost:${assetPort}`;
      shellUrl.pathname = "/";
      shellUrl.search = "";

      let html = await fetch(shellUrl.toString(), req).then((r) => r.text());
      html = renderDocument(html, rendered);
      return new Response(html, {
        headers: {
          "Content-Type": "text/html",
        },
      });
    }

    url.host = `localhost:${assetPort}`;
    return fetch(url.toString(), req);
  },
});

console.log(`Server running at ${server.hostname}:${server.port}`);