Module aws_smithy_http_server::request::extension

Extension types.

Extension types are types that are stored in and extracted from both requests and responses.

There is only one generic extension type for requests, Extension.

On the other hand, the server SDK uses multiple concrete extension types for responses in order to store a variety of information, like the operation that was executed, the operation error that got returned, or the runtime error that happened, among others. The information stored in these types may be useful to [tower::Layer]s that post-process the response: for instance, a particular metrics layer implementation might want to emit metrics about the number of times an an operation got executed.

Structs

• Extension
  Generic extension type stored in and extracted from request extensions.
• MissingExtension
  The extension has not been added to the Request or has been previously removed.