The request type is sent in the
RequestType field in the vendor request object sent by AWS CloudFormation when the template developer creates, updates, or
deletes a stack that contains a custom resource.
Each request type has a particular set of fields that are sent with the request, including an S3 URL for the
response by the custom resource provider. The provider responds to the S3 bucket with either a
FAILED result. Each result also has a particular set of fields expected by
This section provides information about the request and response fields, with examples, for each request type.