Validate

Summary

Validate that received events conform to the JSON schema specified in Settings -> Parameters.

For example, it is best practice to validate input before processing it. E.g. we can check that a HTTP request body is an object with the property foo before accessing that property while processing by passing the received request through this function, with the corresponding JSON schema.

{
    type: "object",
    properties: {
        body: {
            type: "object",
            properties: {
                foo
            }
        }
    }
}

Ports

Events passed to the in port will be validated. If the passed event conform to the specified JSON schema, then it is routed to the out port.

Input/Output Format

There is no assumptions made about the format of the received event.

For the most parts, events are passed through as-is.
Some options in Settings -> Parameters may result in the event being modified. Please consult the documentation of each setting.

Events

When a received event does not conform to the specified schema, this functions emitts a response event, with the following object as argument.

{
    status: 422,
    body: validation_errors
}

422 refers to the 422 UNPROCESSABLE ENTITY HTTP status code.

Other

Other than emitting a response event, events that do not conform to the specified schema are simply dropped.