Batching HTTP Requests

Learn how to make multiple HTTP requests concurrently in a Laminar Step

When you need to make multiple HTTP requests concurrently within a single step, lam.httpRequests is your go-to. This is more efficient than creating multiple sequential lam.httpRequest steps if the requests don't depend on each other's immediate output.

The value associated with lam.httpRequests is an array of objects, where each object has the same structure as a single lam.httpRequest definition.

The output of a lam.httpRequests step will be an array of response objects, corresponding to the order of requests defined.

Example: Suppose we want to handle incoming orders and we want to send them to different fulfillment centres.

1

Send Orders to Warehouse

(data) => {
  const { input } = data;
  
  return {
    "lam.httpRequests": [
      {
        "method": "POST",
        "url": "{{config.baseUrl}}/send-to-warehouse/premium",
        "body": input.premiumOrder
      },
      {
        "method": "POST",
        "url": "{{config.baseUrl}}/send-to-warehouse/regular",
        "pathParams": {
          "itemId": input.regularOrder
        }
      }
    ]
  };
}

2

Update Status Orders

(data) => {
  const { input } = data;
  const { response } = data;
  
  return {
    "lam.httpRequests": [
      {
        "method": "PUT",
        "url": `{{config.baseUrl}}/order/${input.premiumOrder.id}`,
        "body": {
          "status": "Processing",
          "tracking_url": response[0].tracking_url,
          "shipment_reference_id": response[0].tracking_number,
        }
      },
      {
        "method": "PUT",
        "url": `{{config.baseUrl}}/order/${input.regularOrder.id}`,
        "body": {
          "status": "Processing",
          "tracking_url": response[1].tracking_url,
          "shipment_reference_id": response[1].tracking_number,
        }
      }
    ]
  };
}