Trait FromRequest

pub trait FromRequest<S, M = ViaRequest>: Sized {
    type Rejection: IntoResponse;

    // Required method
    fn from_request(
        req: Request<Body>,
        state: &S,
    ) -> impl Future<Output = Result<Self, Self::Rejection>> + Send;
}
Expand description

Types that can be created from requests.

Extractors that implement FromRequest can consume the request body and can thus only be run once for handlers.

If your extractor doesnโ€™t need to consume the request body then you should implement FromRequestParts and not FromRequest.

See axum::extract for more general docs about extractors.

Required Associated Typesยง

type Rejection: IntoResponse

If the extractor fails itโ€™ll use this โ€œrejectionโ€ type. A rejection is a kind of error that can be converted into a response.

Required Methodsยง

fn from_request( req: Request<Body>, state: &S, ) -> impl Future<Output = Result<Self, Self::Rejection>> + Send

Perform the extraction.

Dyn Compatibilityยง

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Typesยง

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impl<S> FromRequest<S> for String
where S: Send + Sync,

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impl<S, T1> FromRequest<S> for (T1,)
where T1: FromRequest<S> + Send, S: Send + Sync,

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type Rejection = Response<Body>

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fn from_request( req: Request<Body>, state: &S, ) -> impl Future<Output = Result<(T1,), <(T1,) as FromRequest<S>>::Rejection>>

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impl<S, T1, T2> FromRequest<S> for (T1, T2)
where T1: FromRequestParts<S> + Send, T2: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3> FromRequest<S> for (T1, T2, T3)
where T1: FromRequestParts<S> + Send, T2: FromRequestParts<S> + Send, T3: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3, T4> FromRequest<S> for (T1, T2, T3, T4)
where T1: FromRequestParts<S> + Send, T2: FromRequestParts<S> + Send, T3: FromRequestParts<S> + Send, T4: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3, T4, T5> FromRequest<S> for (T1, T2, T3, T4, T5)
where T1: FromRequestParts<S> + Send, T2: FromRequestParts<S> + Send, T3: FromRequestParts<S> + Send, T4: FromRequestParts<S> + Send, T5: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3, T4, T5, T6> FromRequest<S> for (T1, T2, T3, T4, T5, T6)
where T1: FromRequestParts<S> + Send, T2: FromRequestParts<S> + Send, T3: FromRequestParts<S> + Send, T4: FromRequestParts<S> + Send, T5: FromRequestParts<S> + Send, T6: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3, T4, T5, T6, T7> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7)
where T1: FromRequestParts<S> + Send, T2: FromRequestParts<S> + Send, T3: FromRequestParts<S> + Send, T4: FromRequestParts<S> + Send, T5: FromRequestParts<S> + Send, T6: FromRequestParts<S> + Send, T7: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8)
where T1: FromRequestParts<S> + Send, T2: FromRequestParts<S> + Send, T3: FromRequestParts<S> + Send, T4: FromRequestParts<S> + Send, T5: FromRequestParts<S> + Send, T6: FromRequestParts<S> + Send, T7: FromRequestParts<S> + Send, T8: FromRequest<S> + Send, S: Send + Sync,

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15)

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impl<S, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16> FromRequest<S> for (T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16)

Implementorsยง

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impl<S> FromRequest<S> for BytesMut
where S: Send + Sync,

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impl<S> FromRequest<S> for Bytes
where S: Send + Sync,

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impl<S> FromRequest<S> for Body
where S: Send + Sync,

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impl<S> FromRequest<S> for Request<Body>
where S: Send + Sync,

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impl<S> FromRequest<S> for Multipart
where S: Send + Sync,

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impl<S> FromRequest<S> for RawForm
where S: Send + Sync,

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impl<S, T> FromRequest<S> for Option<T>
where T: OptionalFromRequest<S>, S: Send + Sync,

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impl<S, T> FromRequest<S> for Result<T, <T as FromRequest<S>>::Rejection>
where T: FromRequest<S>, S: Send + Sync,

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impl<S, T> FromRequest<S, ViaParts> for T
where S: Send + Sync, T: FromRequestParts<S>,

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impl<T, S> FromRequest<S> for Form<T>
where T: DeserializeOwned, S: Send + Sync,

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impl<T, S> FromRequest<S> for Json<T>
where T: DeserializeOwned, S: Send + Sync,