```toml type = "webpack" webpack_config = "webpack.config.js"

these will be used in production

vars = { WORKER_ENV = "production", SENTRY_ENABLED = true }

[env.local]

these will be used only when --env=local

vars = { WORKER_ENV = "local", SENTRY_ENABLED = false } ```

wrangler dev --env=local

```js // Auth Worker

export default { async fetch(request, env) { // Read x-custom-token header and make sure it matches SECRET_TOKEN if (request.headers.get('x-custom-token') === env.SECRET_TOKEN) { return new Response('Request allowed', { status: 200 }); } else { return new Response('x-custom-token does not match, request not allowed', { status: 403 }); } }, }; ```

```js // Gateway Worker

export default { async fetch(request, env) { // Fetch AUTH service and pass request const authResponse = await env.auth.fetch(request.clone());

// Return response from the AUTH service if the response status is not 200
// It would return 403 'x-custom-token does not match, request not allowed' response in such case
if (authResponse.status !== 200) {
  return authResponse;
}

// Request allowed
// You can write application logic here
// In this case we delegate the logic to an `application` Worker
return await env.application.fetch(request)

}, }; ```

js export default { async tail(events) { fetch("https://example.com/endpoint", { method: "POST", body: JSON.stringify(events), }) } }