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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);
},
};