Struct tower_http::trace::Trace[−][src]

pub struct Trace<S, M, MakeSpan = DefaultMakeSpan, OnRequest = DefaultOnRequest, OnResponse = DefaultOnResponse, OnBodyChunk = DefaultOnBodyChunk, OnEos = DefaultOnEos, OnFailure = DefaultOnFailure> { /* fields omitted */ }

This is supported on crate feature trace only.

Expand description

Middleware that adds high level tracing to a Service.

See the module docs for an example.

Implementations

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impl<S, M> Trace<S, M>

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pub fn new(inner: S, make_classifier: M) -> Self where
    M: MakeClassifier,

Create a new Trace using the given MakeClassifier.

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pub fn layer(make_classifier: M) -> TraceLayer<M> where
    M: MakeClassifier,

Returns a new Layer that wraps services with a TraceLayer middleware.

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impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

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pub fn get_ref(&self) -> &S

Gets a reference to the underlying service.

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pub fn get_mut(&mut self) -> &mut S

Gets a mutable reference to the underlying service.

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pub fn into_inner(self) -> S

Consumes self, returning the underlying service.

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pub fn on_request<NewOnRequest>(
    self, 
    new_on_request: NewOnRequest
) -> Trace<S, M, MakeSpan, NewOnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Customize what to do when a request is received.

NewOnRequest is expected to implement OnRequest.

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pub fn on_response<NewOnResponse>(
    self, 
    new_on_response: NewOnResponse
) -> Trace<S, M, MakeSpan, OnRequest, NewOnResponse, OnBodyChunk, OnEos, OnFailure>

Customize what to do when a response has been produced.

NewOnResponse is expected to implement OnResponse.

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pub fn on_body_chunk<NewOnBodyChunk>(
    self, 
    new_on_body_chunk: NewOnBodyChunk
) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, NewOnBodyChunk, OnEos, OnFailure>

Customize what to do when a body chunk has been sent.

NewOnBodyChunk is expected to implement OnBodyChunk.

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pub fn on_eos<NewOnEos>(
    self, 
    new_on_eos: NewOnEos
) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, NewOnEos, OnFailure>

Customize what to do when a streaming response has closed.

NewOnEos is expected to implement OnEos.

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pub fn on_failure<NewOnFailure>(
    self, 
    new_on_failure: NewOnFailure
) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, NewOnFailure>

Customize what to do when a response has been classified as a failure.

NewOnFailure is expected to implement OnFailure.

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pub fn make_span_with<NewMakeSpan>(
    self, 
    new_make_span: NewMakeSpan
) -> Trace<S, M, NewMakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Customize how to make Spans that all request handling will be wrapped in.

NewMakeSpan is expected to implement MakeSpan.

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impl<S> Trace<S, SharedClassifier<ServerErrorsAsFailures>, DefaultMakeSpan, DefaultOnRequest, DefaultOnResponse, DefaultOnBodyChunk, DefaultOnEos, DefaultOnFailure>

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pub fn new_for_http(inner: S) -> Self

Create a new Trace using ServerErrorsAsFailures which supports classifying regular HTTP responses based on the status code.

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impl<S> Trace<S, SharedClassifier<GrpcErrorsAsFailures>, DefaultMakeSpan, DefaultOnRequest, DefaultOnResponse, DefaultOnBodyChunk, DefaultOnEos, DefaultOnFailure>

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pub fn new_for_grpc(inner: S) -> Self

Create a new Trace using GrpcErrorsAsFailures which supports classifying gRPC responses and streams based on the grpc-status header.

Trait Implementations

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impl<S: Clone, M: Clone, MakeSpan: Clone, OnRequest: Clone, OnResponse: Clone, OnBodyChunk: Clone, OnEos: Clone, OnFailure: Clone> Clone for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

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fn clone(
    &self
) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl<S: Debug, M: Debug, MakeSpan: Debug, OnRequest: Debug, OnResponse: Debug, OnBodyChunk: Debug, OnEos: Debug, OnFailure: Debug> Debug for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

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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<S, ReqBody, ResBody, M, OnRequestT, OnResponseT, OnFailureT, OnBodyChunkT, OnEosT, MakeSpanT> Service<Request<ReqBody>> for Trace<S, M, MakeSpanT, OnRequestT, OnResponseT, OnBodyChunkT, OnEosT, OnFailureT> where
    S: Service<Request<ReqBody>, Response = Response<ResBody>>,
    ReqBody: Body,
    ResBody: Body,
    ResBody::Error: Display + 'static,
    S::Error: Display + 'static,
    M: MakeClassifier,
    M::Classifier: Clone,
    MakeSpanT: MakeSpan<ReqBody>,
    OnRequestT: OnRequest<ReqBody>,
    OnResponseT: OnResponse<ResBody> + Clone,
    OnBodyChunkT: OnBodyChunk<ResBody::Data> + Clone,
    OnEosT: OnEos + Clone,
    OnFailureT: OnFailure<M::FailureClass> + Clone,

type Response = Response<ResponseBody<ResBody, M::ClassifyEos, OnBodyChunkT, OnEosT, OnFailureT>>

Responses given by the service.

type Error = S::Error

Errors produced by the service.

type Future = ResponseFuture<S::Future, M::Classifier, OnResponseT, OnBodyChunkT, OnEosT, OnFailureT>

The future response value.

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fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Poll::Ready(Ok(())) when the service is able to process requests. Read more

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fn call(&mut self, req: Request<ReqBody>) -> Self::Future

Process the request and return the response asynchronously. Read more

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impl<S: Copy, M: Copy, MakeSpan: Copy, OnRequest: Copy, OnResponse: Copy, OnBodyChunk: Copy, OnEos: Copy, OnFailure: Copy> Copy for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Auto Trait Implementations

impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> RefUnwindSafe for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> where
    M: RefUnwindSafe,
    MakeSpan: RefUnwindSafe,
    OnBodyChunk: RefUnwindSafe,
    OnEos: RefUnwindSafe,
    OnFailure: RefUnwindSafe,
    OnRequest: RefUnwindSafe,
    OnResponse: RefUnwindSafe,
    S: RefUnwindSafe,

impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> Send for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> where
    M: Send,
    MakeSpan: Send,
    OnBodyChunk: Send,
    OnEos: Send,
    OnFailure: Send,
    OnRequest: Send,
    OnResponse: Send,
    S: Send,

impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> Sync for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> where
    M: Sync,
    MakeSpan: Sync,
    OnBodyChunk: Sync,
    OnEos: Sync,
    OnFailure: Sync,
    OnRequest: Sync,
    OnResponse: Sync,
    S: Sync,

impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> Unpin for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> where
    M: Unpin,
    MakeSpan: Unpin,
    OnBodyChunk: Unpin,
    OnEos: Unpin,
    OnFailure: Unpin,
    OnRequest: Unpin,
    OnResponse: Unpin,
    S: Unpin,

impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> UnwindSafe for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> where
    M: UnwindSafe,
    MakeSpan: UnwindSafe,
    OnBodyChunk: UnwindSafe,
    OnEos: UnwindSafe,
    OnFailure: UnwindSafe,
    OnRequest: UnwindSafe,
    OnResponse: UnwindSafe,
    S: UnwindSafe,

Blanket Implementations

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

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

Mutably borrows from an owned value. Read more

impl<T> Conv for T

fn conv<T>(self) -> T where
    Self: Into<T>,

Converts self into T using Into<T>. Read more

impl<T> Conv for T

fn conv<T>(self) -> T where
    Self: Into<T>,

Converts self into a target type. Read more

impl<T> FmtForward for T

fn fmt_binary(self) -> FmtBinary<Self> where
    Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.

fn fmt_display(self) -> FmtDisplay<Self> where
    Self: Display,

Causes self to use its Display implementation when Debug-formatted. Read more

fn fmt_lower_exp(self) -> FmtLowerExp<Self> where
    Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted. Read more

fn fmt_lower_hex(self) -> FmtLowerHex<Self> where
    Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted. Read more

fn fmt_octal(self) -> FmtOctal<Self> where
    Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.

fn fmt_pointer(self) -> FmtPointer<Self> where
    Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted. Read more

fn fmt_upper_exp(self) -> FmtUpperExp<Self> where
    Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted. Read more

fn fmt_upper_hex(self) -> FmtUpperHex<Self> where
    Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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

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pub fn into(self) -> U

Performs the conversion.

impl<T> Pipe for T where
    T: ?Sized,

fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R

Pipes by value. This is generally the method you want to use. Read more

fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R where
    R: 'a,

Borrows self and passes that borrow into the pipe function. Read more

fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R where
    R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more

fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R where
    Self: Borrow<B>,
    B: 'a + ?Sized,
    R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more

fn pipe_borrow_mut<'a, B, R>(
    &'a mut self, 
    func: impl FnOnce(&'a mut B) -> R
) -> R where
    Self: BorrowMut<B>,
    B: 'a + ?Sized,
    R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more

fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R where
    Self: AsRef<U>,
    R: 'a,
    U: 'a + ?Sized,

Borrows self, then passes self.as_ref() into the pipe function.

fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R where
    Self: AsMut<U>,
    R: 'a,
    U: 'a + ?Sized,

Mutably borrows self, then passes self.as_mut() into the pipe function. Read more

fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: Deref<Target = T>,
    T: 'a + ?Sized,
    R: 'a,

Borrows self, then passes self.deref() into the pipe function.

fn pipe_deref_mut<'a, T, R>(
    &'a mut self, 
    func: impl FnOnce(&'a mut T) -> R
) -> R where
    Self: DerefMut<Target = T> + Deref,
    T: 'a + ?Sized,
    R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function. Read more

impl<T> Pipe for T

fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R

Pipes a value into a function that cannot ordinarily be called in suffix position. Read more

impl<T> PipeAsRef for T

fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: AsRef<T>,
    T: 'a,
    R: 'a,

Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more

fn pipe_as_mut<'a, T, R>(&'a mut self, func: impl FnOnce(&'a mut T) -> R) -> R where
    Self: AsMut<T>,
    T: 'a,
    R: 'a,

Pipes a trait mutable borrow into a function that cannot normally be called in suffix position. Read more

impl<T> PipeBorrow for T

fn pipe_borrow<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
    Self: Borrow<T>,
    T: 'a,
    R: 'a,

Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more

fn pipe_borrow_mut<'a, T, R>(
    &'a mut self, 
    func: impl FnOnce(&'a mut T) -> R
) -> R where
    Self: BorrowMut<T>,
    T: 'a,
    R: 'a,

Pipes a trait mutable borrow into a function that cannot normally be called in suffix position. Read more

impl<T> PipeDeref for T

fn pipe_deref<'a, R>(&'a self, func: impl FnOnce(&'a Self::Target) -> R) -> R where
    Self: Deref,
    R: 'a,

Pipes a dereference into a function that cannot normally be called in suffix position. Read more

fn pipe_deref_mut<'a, R>(
    &'a mut self, 
    func: impl FnOnce(&'a mut Self::Target) -> R
) -> R where
    Self: DerefMut,
    R: 'a,

Pipes a mutable dereference into a function that cannot normally be called in suffix position. Read more

impl<T> PipeRef for T

fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R where
    R: 'a,

Pipes a reference into a function that cannot ordinarily be called in suffix position. Read more

fn pipe_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R where
    R: 'a,

Pipes a mutable reference into a function that cannot ordinarily be called in suffix position. Read more

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impl<T> PolicyExt for T where
    T: ?Sized,

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pub fn and<P, B, E>(Self, P) -> And<T, P> where
    T: Policy<B, E>,
    P: Policy<B, E>,

This is supported on crate feature follow-redirect only.

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more

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pub fn or<P, B, E>(Self, P) -> Or<T, P> where
    T: Policy<B, E>,
    P: Policy<B, E>,

This is supported on crate feature follow-redirect only.

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more

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impl<T, Request> ServiceExt<Request> for T where
    T: Service<Request> + ?Sized,

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fn ready(&mut self) -> Ready<'_, Self, Request>

Yields a mutable reference to the service when it is ready to accept a request.

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fn ready_and(&mut self) -> Ready<'_, Self, Request>

👎 Deprecated since 0.4.6:

please use the ServiceExt::ready method instead

Yields a mutable reference to the service when it is ready to accept a request.

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fn ready_oneshot(self) -> ReadyOneshot<Self, Request>

Yields the service when it is ready to accept a request.

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fn oneshot(self, req: Request) -> Oneshot<Self, Request>

Consume this Service, calling with the providing request once it is ready.

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fn call_all<S>(self, reqs: S) -> CallAll<Self, S> where
    S: Stream<Item = Request>,
    Self::Error: Into<Box<dyn Error + Sync + Send + 'static, Global>>,

Process all requests from the given Stream, and produce a Stream of their responses. Read more

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fn and_then<F>(self, f: F) -> AndThen<Self, F> where
    F: Clone,

Executes a new future after this service’s future resolves. This does not alter the behaviour of the poll_ready method. Read more

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fn map_response<F, Response>(self, f: F) -> MapResponse<Self, F> where
    F: FnOnce(Self::Response) -> Response + Clone,

Maps this service’s response value to a different value. This does not alter the behaviour of the poll_ready method. Read more

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fn map_err<F, Error>(self, f: F) -> MapErr<Self, F> where
    F: FnOnce(Self::Error) -> Error + Clone,

Maps this service’s error value to a different value. This does not alter the behaviour of the poll_ready method. Read more

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fn map_result<F, Response, Error>(self, f: F) -> MapResult<Self, F> where
    Error: From<Self::Error>,
    F: FnOnce(Result<Self::Response, Self::Error>) -> Result<Response, Error> + Clone,

Maps this service’s result type (Result<Self::Response, Self::Error>) to a different value, regardless of whether the future succeeds or fails. Read more

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fn map_request<F, NewRequest>(self, f: F) -> MapRequest<Self, F> where
    F: FnMut(NewRequest) -> Request + Clone,

Composes a function in front of the service. Read more

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fn then<F, Response, Error, Fut>(self, f: F) -> Then<Self, F> where
    Error: From<Self::Error>,
    F: FnOnce(Result<Self::Response, Self::Error>) -> Fut + Clone,
    Fut: Future<Output = Result<Response, Error>>,

Composes an asynchronous function after this service. Read more

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fn map_future<F, Fut, Response, Error>(self, f: F) -> MapFuture<Self, F> where
    Error: From<Self::Error>,
    F: FnMut(Self::Future) -> Fut,
    Fut: Future<Output = Result<Response, Error>>,

Composes a function that transforms futures produced by the service. Read more

impl<T> Tap for T

fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more

fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more

fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self where
    Self: Borrow<B>,
    B: ?Sized,

Immutable access to the Borrow of a value. Read more

fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self where
    Self: BorrowMut<B>,
    B: ?Sized,

Mutable access to the BorrowMut of a value. Read more

fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self where
    Self: AsRef<R>,
    R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more

fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self where
    Self: AsMut<R>,
    R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more

fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self where
    Self: Deref<Target = T>,
    T: ?Sized,

Immutable access to the Deref::Target of a value. Read more

fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self where
    Self: DerefMut<Target = T> + Deref,
    T: ?Sized,

Mutable access to the Deref::Target of a value. Read more

fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.

fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds. Read more

fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self where
    Self: Borrow<B>,
    B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds. Read more

fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self where
    Self: BorrowMut<B>,
    B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds. Read more

fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self where
    Self: AsRef<R>,
    R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds. Read more

fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self where
    Self: AsMut<R>,
    R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds. Read more

fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self where
    Self: Deref<Target = T>,
    T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds. Read more

fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self where
    Self: DerefMut<Target = T> + Deref,
    T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds. Read more

impl<T> Tap for T

fn tap<F, R>(self, func: F) -> Self where
    F: FnOnce(&Self) -> R,

Provides immutable access for inspection. Read more

fn tap_dbg<F, R>(self, func: F) -> Self where
    F: FnOnce(&Self) -> R,

Calls tap in debug builds, and does nothing in release builds.

fn tap_mut<F, R>(self, func: F) -> Self where
    F: FnOnce(&mut Self) -> R,

Provides mutable access for modification. Read more

fn tap_mut_dbg<F, R>(self, func: F) -> Self where
    F: FnOnce(&mut Self) -> R,

Calls tap_mut in debug builds, and does nothing in release builds.

impl<T, U> TapAsRef<U> for T where
    U: ?Sized,

fn tap_ref<F, R>(self, func: F) -> Self where
    Self: AsRef<T>,
    F: FnOnce(&T) -> R,

Provides immutable access to the reference for inspection.

fn tap_ref_dbg<F, R>(self, func: F) -> Self where
    Self: AsRef<T>,
    F: FnOnce(&T) -> R,

Calls tap_ref in debug builds, and does nothing in release builds.

fn tap_ref_mut<F, R>(self, func: F) -> Self where
    Self: AsMut<T>,
    F: FnOnce(&mut T) -> R,

Provides mutable access to the reference for modification.

fn tap_ref_mut_dbg<F, R>(self, func: F) -> Self where
    Self: AsMut<T>,
    F: FnOnce(&mut T) -> R,

Calls tap_ref_mut in debug builds, and does nothing in release builds.

impl<T, U> TapBorrow<U> for T where
    U: ?Sized,

fn tap_borrow<F, R>(self, func: F) -> Self where
    Self: Borrow<T>,
    F: FnOnce(&T) -> R,

Provides immutable access to the borrow for inspection. Read more

fn tap_borrow_dbg<F, R>(self, func: F) -> Self where
    Self: Borrow<T>,
    F: FnOnce(&T) -> R,

Calls tap_borrow in debug builds, and does nothing in release builds.

fn tap_borrow_mut<F, R>(self, func: F) -> Self where
    Self: BorrowMut<T>,
    F: FnOnce(&mut T) -> R,

Provides mutable access to the borrow for modification.

fn tap_borrow_mut_dbg<F, R>(self, func: F) -> Self where
    Self: BorrowMut<T>,
    F: FnOnce(&mut T) -> R,

Calls tap_borrow_mut in debug builds, and does nothing in release builds. Read more

impl<T> TapDeref for T

fn tap_deref<F, R>(self, func: F) -> Self where
    Self: Deref,
    F: FnOnce(&Self::Target) -> R,

Immutably dereferences self for inspection.

fn tap_deref_dbg<F, R>(self, func: F) -> Self where
    Self: Deref,
    F: FnOnce(&Self::Target) -> R,

Calls tap_deref in debug builds, and does nothing in release builds.

fn tap_deref_mut<F, R>(self, func: F) -> Self where
    Self: DerefMut,
    F: FnOnce(&mut Self::Target) -> R,

Mutably dereferences self for modification.

fn tap_deref_mut_dbg<F, R>(self, func: F) -> Self where
    Self: DerefMut,
    F: FnOnce(&mut Self::Target) -> R,

Calls tap_deref_mut in debug builds, and does nothing in release builds. Read more

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impl<T> ToOwned for T where
    T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> TryConv for T

fn try_conv<T>(self) -> Result<T, Self::Error> where
    Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more

impl<T> TryConv for T

fn try_conv<T>(self) -> Result<T, Self::Error> where
    Self: TryInto<T>,

Attempts to convert self into a target type. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

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pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto<U> for T where
    U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.