Trait IntoResponse 

pub trait IntoResponse {
    // Required method
    fn into_response(self) -> Response;
}

Anything a handler is allowed to return.

This is what lets a handler return a &str, a Json, a Result, or a full Response without wrapping it by hand.

Required Methods

fn into_response(self) -> Response

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl IntoResponse for &str

fn into_response(self) -> Response

impl IntoResponse for ()

fn into_response(self) -> Response

impl IntoResponse for Error

A framework error renders as the development error page, or a generic 500 in production.

fn into_response(self) -> Response

impl IntoResponse for Error

An I/O failure in a handler is a server error; carried separately because std::io::Error cannot implement a foreign trait here.

fn into_response(self) -> Response

impl IntoResponse for Json

fn into_response(self) -> Response

impl IntoResponse for String

fn into_response(self) -> Response

impl<T: IntoResponse, E: IntoResponse> IntoResponse for Result<T, E>

? in a handler works for any error that knows how to become a response.

This is what lets validation return a 422 with its own JSON body while a framework error still reaches the error page: each error type decides how it is rendered, rather than everything collapsing into a 500.

fn into_response(self) -> Response

impl<T: IntoResponse> IntoResponse for (u16, T)

fn into_response(self) -> Response

impl<T: IntoResponse> IntoResponse for Option<T>

None becomes a 404, which makes req.param_as::<i64>("id")? style lookups read naturally in a handler.

fn into_response(self) -> Response

Implementors

impl IntoResponse for ResourceResponse

impl IntoResponse for Response

impl IntoResponse for Status