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MetadataValue

trillium_grpc::metadata

Enum MetadataValue 

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pub enum MetadataValue {
    Ascii(String),
    Binary(Vec<u8>),
}
Expand description

A single metadata value: either printable ASCII text or, for -bin keys, raw bytes (base64-encoded on the wire).

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Ascii(String)

A printable-ASCII text value.

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Binary(Vec<u8>)

A raw byte value, carried base64-encoded under a -bin key.

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impl MetadataValue

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pub fn as_ascii(&self) -> Option<&str>

The text, if this is an Ascii value; None for binary.

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pub fn as_binary(&self) -> Option<&[u8]>

The bytes, if this is a Binary value; None for ASCII.

Trait Implementations§

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impl Clone for MetadataValue

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fn clone(&self) -> MetadataValue

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for MetadataValue

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Server for T
where T: 'static,

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async fn unary<Req, Resp>( conn: Conn, f: impl AsyncFnOnce(&mut GrpcServerConn<Self>, Req) -> Result<Resp, Status>, ) -> Conn
where Self: Codec<Req> + Codec<Resp>, Req: Send + 'static, Resp: Send + 'static,

Available on crate feature server only.
Unary RPC: read exactly one request, await the user function, emit one response frame followed by grpc-status trailers.
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async fn client_streaming<Resp>( conn: Conn, f: impl AsyncFnOnce(&mut GrpcServerConn<Self>) -> Result<Resp, Status>, ) -> Conn
where Self: Codec<Resp>, Resp: Send + 'static,

Available on crate feature server only.
Client-streaming RPC: hand the user a GrpcServerConn from which they read the request stream (conn.requests::<Req>()); emit the single response frame and grpc-status trailers.
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async fn server_streaming<Req, Resp, S>( conn: Conn, f: impl AsyncFnOnce(&mut GrpcServerConn<Self>, Req) -> Result<S, Status>, ) -> Conn
where Self: Codec<Req> + Codec<Resp>, Req: Send + 'static, Resp: Send + 'static, S: Stream<Item = Result<Resp, Status>> + Send + 'static,

Available on crate feature server only.
Server-streaming RPC: read one request, await the user function for a response Stream, then frame each item lazily into the response body with grpc-status trailers derived from how the stream ended.
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async fn bidi<Req, Resp, R>( conn: Conn, prologue: impl AsyncFnOnce(&mut GrpcServerConn<Self>) -> Result<R, Status>, ) -> Conn
where Self: Codec<Req> + Codec<Resp>, Req: Send + 'static, Resp: Send + 'static, R: BidiResponder<Req, Resp>,

Available on crate feature server only.
Bidirectional-streaming RPC — the run-phase prologue. Hand the user a GrpcServerConn from which they may read early request messages (to decide response headers) and set initial metadata, then return a BidiResponder that drives the read-while-write loop after the head is flushed. Returning Err(Status) rejects before the flush (trailers-only, no upgrade). See crate::server::bidi for the seam mechanics.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.