Struct RetryLayer 

pub struct RetryLayer { /* private fields */ }

Available on non-WebAssembly only.

Retry middleware.

When the inner application returns a response whose status code is in the configured list, the request is re-dispatched up to max_retries additional times. If all attempts return a retryable status the last response is returned as-is.

Implementations

impl RetryLayer

pub fn new() -> RetryLayer

Create a RetryLayer with defaults: retry on 502, 503, 504 up to 3 times.

pub fn max_retries(self, n: u32) -> RetryLayer

Override the maximum number of retry attempts.

pub fn retry_on(self, codes: Vec<i16>) -> RetryLayer

Override the set of status codes that trigger a retry.

Trait Implementations

impl Default for RetryLayer

fn default() -> RetryLayer

Returns the “default value” for a type.

impl Middleware for RetryLayer

fn handle( &self, request: &Request, connection: &ConnectionInfo, next: &dyn Application, ) -> Result<Response, String>

fn runs_inline(&self, _request: &Request, _connection: &ConnectionInfo) -> bool

true when this layer’s own work for request never blocks (in-memory state, atomics, short mutexes) — see Application::runs_inline. A WithMiddleware stack runs inline only if every layer and the inner application agree. Default false.

fn is_passthrough( &self, _request: &Request, _connection: &ConnectionInfo, ) -> bool

true when handle would do nothing for request but call next (e.g. a rate limit that isn’t configured). A WithMiddleware stack offers the inner application’s execute_async only if every layer passes the request through. Default false.

fn accepts_streamed_body( &self, _request: &Request, _connection: &ConnectionInfo, ) -> bool

true when this layer never reads request.body, so the inner application may receive it as a stream (Application::streams_body). A layer that inspects the body (CSRF tokens in a form, request signatures, rewriting) must keep the default false: it would see an empty body.

fn answers_streamed_body( &self, _request: &Request, _connection: &ConnectionInfo, ) -> bool

true when this layer answers request itself — it doesn’t call next — and reads its body as a stream (a proxy forwarding it as it arrives). The body is then streamed whatever the layers after it and the application would say. Requires accepts_streamed_body. Since 18.3.0.

fn layer_name(&self) -> &'static str

A short name for this layer, as tools that describe an app list it (Application::middleware_names): by default the type’s name without its module path or generic parameters (CacheLayer). Since 18.28.0.