Trait FromRequest 

pub trait FromRequest: Sized {
    type Filter: Filter<Error = Rejection>;

    // Required method
    fn new() -> Self::Filter;

    // Provided methods
    fn is_body() -> bool { ... }
    fn is_optional() -> bool { ... }
    fn is_query() -> bool { ... }
    fn content_type() -> &'static str { ... }
}

Required Associated Types

type Filter: Filter<Error = Rejection>

Extract should be (Self,),

Required Methods

fn new() -> Self::Filter

Provided Methods

fn is_body() -> bool

It’s true iff the type represents whole request body.

It returns true for Json<T> and Form<T>.

fn is_optional() -> bool

It’s true if the type is optional.

It returns true for Option<T>.

fn is_query() -> bool

It’s true iff the type represents whole request query.

It returns true for Query<T>.

fn content_type() -> &'static str

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl<T> FromRequest for Option<T>

where T: 'static + FromRequest + Send, T::Filter: Send + Sync + Filter<Extract = (T,), Error = Rejection>,

type Filter = BoxedFilter<(Option<T>,)>

fn is_body() -> bool

fn is_optional() -> bool

fn is_query() -> bool

fn new() -> Self::Filter

Implementors

impl FromRequest for FormData

Available on crate feature multipart only.

type Filter = BoxedFilter<(FormData,)>

impl FromRequest for Ws

Available on crate feature websocket only.

type Filter = BoxedFilter<(Ws,)>

impl<T> FromRequest for Form<T>

where T: 'static + Send + DeserializeOwned,

type Filter = BoxedFilter<(Form<T>,)>

impl<T> FromRequest for Json<T>

where T: 'static + Send + DeserializeOwned,

type Filter = BoxedFilter<(Json<T>,)>

impl<T> FromRequest for Query<T>

where T: 'static + Send + DeserializeOwned,

type Filter = BoxedFilter<(Query<T>,)>