Module layers 

Middleware Layers

This module contains the tower::Service middleware layers used by the Gateway to compose the runtime behavior. Each layer is responsible for a specific aspect of request/response processing.

Available Layers

• error::ErrorLayer: Catches errors from inner services and converts them to HTTP responses using a configured ErrorHandler.
• headers::HeaderLayer: Filters and transforms incoming and outgoing HTTP headers.
• metadata::MetadataLayer: Extracts metadata from the request (e.g., via annotators) and injects it into the request extensions for downstream processing.
• response::ResponseLayer: Applies modifications to the HTTP response before it is returned.

Modules

error

Error Handling Layer

headers

Header Processing Layer

metadata

Metadata Extraction Layer

response

Response Modification Layer