crossws/docs/content/3.adapters/cloudflare.md

Cloudflare

Integrate CrossWS with Cloudflare Workers.

To integrate CrossWS with your Cloudflare Workers, you need to check for the upgrade header.

import wsAdapter from "crossws/adapters/cloudflare";

const { handleUpgrade } = wsAdapter({ message: console.log });

export default {
  async fetch(request, env, context) {
    if (request.headers.get("upgrade") === "websocket") {
      return handleUpgrade(request, env, context);
    }
    return new Response(
      `<script>new WebSocket("ws://localhost:3000").addEventListener("open", (e) => e.target.send("Hello from client!"));</script>`,
      { headers: { "content-type": "text/html" } },
    );
  },
};

Adapter Hooks

• cloudflare:accept (peer)
• cloudflare:message (peer, event)
• cloudflare:error (peer, event)
• cloudflare:close (peer, event)

Learn More

See playground/cloudflare.ts for demo and src/adapters/cloudflare.ts for implementation.