Cloudflare Developers•15mo ago

Getting service bindings to work

Hi there, I'm trying to get one worker to call another worker. Both workers are on the same account. Say that I have worker Apple and worker Banana. I want a method within Apple to call Banana. In the Apple wrangler.toml, I have the service binding:

services = [
  { binding = "banana", service = "banana", environment = "production" }
]

services = [
  { binding = "banana", service = "banana", environment = "production" }
]

I deployed both workers, Apple and Banana. Within my entrypoint worker.ts file for the Apple worker, I assign the env variables to an exported variable that other code files can access within the Apple directory. Such as:

    async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
        sharedEnv.env = env;

        return await router
            .handle(request, env, ctx)
            .catch((err) => error(500, err.stack))
            .then(corsify);
    },

    async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
        sharedEnv.env = env;

        return await router
            .handle(request, env, ctx)
            .catch((err) => error(500, err.stack))
            .then(corsify);
    },

In my interface declaration for my sharedEnv variable that is of type Env, I make sure to put Banana as a type Fetcher:

interface Env {
     RODEO_EMAIL: Fetcher
}

interface Env {
     RODEO_EMAIL: Fetcher
}

Within a method in my Apple worker, I am trying to call Banana with the following code:

      const emailResponse = await sharedEnv.env.banana.fetch(new Request('invite/peel', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          "hello": "world"
        })
      }));

      const emailResponse = await sharedEnv.env.banana.fetch(new Request('invite/peel', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          "hello": "world"
        })
      }));

After deploying both and setting wrangler tail to tail the logs of both workers, I see that something errors out in my fetch call to Banana from the Apple worker. But, when I peek into the logs for Banana, there are no logs written. Am I missing something that is causing Apple to not successfully reach Banana? Your help is much appreciated!!

1 Reply

kian•15mo ago

What error do you see in the Apple Worker? I wouldn't expect a Request w/o an absolute URL to work.

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Getting service bindings to work