client.ts

@@ -1,7 +1,7 @@
 import { parseArgs } from "util";
 
-async function main({ url, domain }: { url: string; domain?: string }) {
-  const serverUrl = `ws://${domain || "localhost:1234"}?new`;
+async function main({ url, domain, subdomain }: { url: string; domain?: string, subdomain?: string }) {
+  const serverUrl = `ws://${domain || "localhost:1234"}?new${subdomain ? `&subdomain=${subdomain}` : ""}`;
   const socket = new WebSocket(serverUrl);
 
   socket.addEventListener("message", (event) => {
@@ -38,9 +38,13 @@ const { values } = parseArgs({
       type: "string",
       short: "d",
     },
+    subdomain: {
+      type: "string",
+      short: "s",
+    },
   },
   allowPositionals: true,
 });
 
 if (!values.port) throw "pass --port 3000";
-main({ url: `localhost:${values.port}`, domain: values.domain });
+main({ url: `localhost:${values.port}`, domain: values.domain, subdomain: values.subdomain });

server.ts

@@ -16,7 +16,8 @@ serve<Client>({
     const reqUrl = new URL(req.url);
 
     if (reqUrl.searchParams.has("new")) {
-      const upgraded = server.upgrade(req, { data: { id: uid() } });
+      const id = reqUrl.searchParams.get("subdomain") || uid();
+      const upgraded = server.upgrade(req, { data: { id } });
       if (upgraded) return;
       else return new Response("Upgrade failed :(", { status: 500 });
     }