Module add_extension 

Middleware that clones a value into an incoming input’s or an output’s extensions

Note though that extensions are best not used for State that you expect to be there, but instead use extensions for optional behaviour to change. Static typed state is better embedded in service structs or as state for routers.

Structs

AddInputExtension

Middleware for adding some shareable value to incoming input’s extensions.

AddInputExtensionLayer

Layer for adding some shareable value to incoming input’s extensions.

AddOutputExtension

Middleware for adding some shareable value to an output’s extensions.

AddOutputExtensionLayer

Layer for adding some shareable value to an output’s extensions.