HTTP

Worker A that declares a Service binding to Worker B can forward a Request object to Worker B, by calling the fetch() method that is exposed on the binding object.

For example, consider the following Worker that implements a fetch() handler:

name = "worker_b"
main = "./src/workerB.js"

export default {
  async fetch(request, env, ctx) {
    return new Response("Hello World!");
  }
}

The following Worker declares a binding to the Worker above:

name = "worker_a"
main = "./src/workerA.js"
services = [
  { binding = "WORKER_B", service = "worker_b" }
]

And then can forward a request to it:

export default {
  async fetch(request, env) {
    return await env.WORKER_B.fetch(request);
  },
};