Note
To enable built-in Node.js APIs and polyfills, add the nodejs_compat compatibility flag to your Wrangler configuration file. This also enables nodejs_compat_v2 as long as your compatibility date is 2024-09-23 or later. Learn more about the Node.js compatibility flag and v2.
You can use node:net â to create a direct connection to servers via a TCP sockets with net.Socket â.
These functions use connect functionality from the built-in cloudflare:sockets module.
import net from "node:net";
const exampleIP = "127.0.0.1";
export default {
async fetch(req) {
const socket = new net.Socket();
socket.connect(4000, exampleIP, function () {
console.log("Connected");
});
socket.write("Hello, Server!");
socket.end();
return new Response("Wrote to server", { status: 200 });
},
};
import net from "node:net";
const exampleIP = "127.0.0.1";
export default {
async fetch(req): Promise<Response> {
const socket = new net.Socket();
socket.connect(4000, exampleIP, function () {
console.log("Connected");
});
socket.write("Hello, Server!");
socket.end();
return new Response("Wrote to server", { status: 200 });
},
} satisfies ExportedHandler;
Additionally, other APIs such as net.BlockList â and net.SocketAddress â are available.
Note that the net.Server â class is not supported by Workers.
The full node:net API is documented in the Node.js documentation for node:net â.
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