Struct MiddlewareStack 

pub struct MiddlewareStack { /* private fields */ }

An ordered set of Middleware, collected from the app builder and every plugin, installed as one axum layer by App::build.

Implementations

impl MiddlewareStack

pub fn new() -> Self

An empty stack.

pub fn push(&mut self, mw: Arc<dyn Middleware>)

Append one middleware to the end of the stack. Its before_request runs after every middleware already in the stack; its after_response runs before them (onion order).

pub fn extend(&mut self, other: impl IntoIterator<Item = Arc<dyn Middleware>>)

Append every middleware from other, preserving order.

pub fn is_empty(&self) -> bool

True when no middleware is registered — App::build skips installing the layer entirely in that case.

pub fn len(&self) -> usize

Number of registered middleware.

pub fn apply(self, router: Router) -> Router

Wrap router with this stack as a single axum middleware layer. A no-op (returns the router unchanged) when the stack is empty.

Trait Implementations

impl Clone for MiddlewareStack

fn clone(&self) -> MiddlewareStack

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for MiddlewareStack

fn default() -> MiddlewareStack

Returns the “default value” for a type.