We’ve added JavaScript-native RPC to Cloudflare Workers
Cloudflare Workers now features a built-in RPC (Remote Procedure Call) system enabling seamless Worker-to-Worker and Worker-to-Durable Object communication, with almost no boilerplate. You just define a class:
export class MyService extends WorkerEntrypoint {
sum(a, b) {
return a + b;
}
}
And then you call it:
let three = await env.MY_SERVICE.sum(1, 2);
No schemas. No routers. Just define methods of a class. Then call them. That's it.
But that's not it
This isn't just any old RPC. We've designed an RPC system so expressive that calling a remote service can feel like using a library – without any need to actually import a library! This is important not just for ease of use, but also security: fewer dependencies means fewer critical security updates and less exposure to supply-chain attacks.
To this end, here are some of the features of Workers RPC:
- For starters, you can pass Structured Clonable types as the params or return value of an RPC. (That means that, unlike JSON, Dates just work, and you can even have cycles.)
- You can additionally pass functions in the params or return value of other functions. When the other side calls the function you passed to Continue reading
