# Example 3 - Node with Error (HTTP)

This example demonstrates error handling in FlowSync transactions. Building upon [Example 2 - Node with Error (HTTP)](/2-1-2/documentation/services/flowsync/flowsync-example-2.md), the configuration shows how to return custom error responses for HTTP requests. When a request is received, the system generates a response containing a specific HTTP error code (500) along with a custom error message, demonstrating how to handle error scenarios in your services using FlowSync.

* To call the HttpNode in the example below, run the following command:

{% code lineNumbers="true" %}

```yaml
curl --insecure \
--location 'https://127.0.0.1/data/flowsync/example3' \
--header 'Authorization: Bearer <replace with your token>'
```

{% endcode %}

For more information on the FlowSync configuration properties, see [Cybus:Node](/2-1-2/documentation/services/service-commissioning-files/resources/cybus-node.md#operation).

<figure><img src="/files/pwqYjbnDCH85UesbhM3U" alt=""><figcaption></figcaption></figure>

{% file src="/files/5irFkGWcY8hVibtyrLDF" %}

{% code title="flowsync-example-3-node-with-error-http.yaml" lineNumbers="true" %}

```yaml
description: FlowSync - Example 3

metadata:
  name: example 3
  version: 1.0.0

resources:
  testServer:
    type: Cybus::Server::Http
    properties:
      basePath: /FlowSync

  exampleNode:
    type: Cybus::Node::Http
    properties:
      parent: !ref testServer
      method: GET
      route: /example3
      operation: transaction

  exampleMappings:
    type: Cybus::Mapping
    properties:
      mappings:
        - subscribe:
            endpoint: !ref exampleNode
          publish:
            endpoint: !ref exampleNode
          rules:
            - transform:
                expression: >-
                  (
                    {
                      "id": $.id,
                      "timestamp": $.timestamp,
                      "error": {
                        "code": 500,
                        "message" : "This is an error message to your HTTP GET request."}
                    }
                  )
```

{% endcode %}


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