Struct h2::RecvStream

[+] Show declaration

[+] Expand attributes
#[must_use = "streams do nothing unless polled"]
pub struct RecvStream { /* fields omitted */ }

[−] Expand description

Receives the body stream and trailers from the remote peer.

A RecvStream is provided by client::ResponseFuture and server::Connection with the received HTTP/2.0 message head (the response and request head respectively).

A RecvStream instance is used to receive the streaming message body and any trailers from the remote peer. It is also used to manage inbound flow control.

See method level documentation for more details on receiving data. See ReleaseCapacity for more details on inbound flow control.

Note that this type implements Stream, yielding the received data frames. When this implementation is used, the capacity is immediately released when the data is yielded. It is recommended to only use this API when the data will not be retained in memory for extended periods of time.

Methods

impl RecvStream

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pub fn is_end_stream(&self) -> bool

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Returns true if the receive half has reached the end of stream.

A return value of true means that calls to poll and poll_trailers will both return None.

pub fn release_capacity(&mut self) -> &mut ReleaseCapacity

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Get a mutable reference to this streams ReleaseCapacity.

It can be used immediately, or cloned to be used later.

pub fn poll_trailers(&mut self) -> Poll<Option<HeaderMap>, Error>

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Returns received trailers.

Trait Implementations

impl Stream for RecvStream

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type Item = Bytes

The type of item this stream will yield on success.

type Error = Error

The type of error this stream may generate.

fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error>

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Attempt to pull out the next value of this stream, returning None if the stream is finished.

fn wait(self) -> Wait<Self>

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Creates an iterator which blocks the current thread until each item of this stream is resolved.

fn into_future(self) -> StreamFuture<Self>

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Converts this stream into a Future.

fn map<U, F>(self, f: F) -> Map<Self, F> where     F: FnMut(Self::Item) -> U,

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Converts a stream of type T to a stream of type U.

fn map_err<U, F>(self, f: F) -> MapErr<Self, F> where     F: FnMut(Self::Error) -> U,

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Converts a stream of error type T to a stream of error type U.

fn filter<F>(self, f: F) -> Filter<Self, F> where     F: FnMut(&Self::Item) -> bool,

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Filters the values produced by this stream according to the provided predicate.

fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F> where     F: FnMut(Self::Item) -> Option<B>,

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Filters the values produced by this stream while simultaneously mapping them to a different type.

fn then<F, U>(self, f: F) -> Then<Self, F, U> where     F: FnMut(Result<Self::Item, Self::Error>) -> U,     U: IntoFuture,

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Chain on a computation for when a value is ready, passing the resulting item to the provided closure f.

fn and_then<F, U>(self, f: F) -> AndThen<Self, F, U> where     F: FnMut(Self::Item) -> U,     U: IntoFuture<Error = Self::Error>,

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Chain on a computation for when a value is ready, passing the successful results to the provided closure f.

fn or_else<F, U>(self, f: F) -> OrElse<Self, F, U> where     F: FnMut(Self::Error) -> U,     U: IntoFuture<Item = Self::Item>,

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Chain on a computation for when an error happens, passing the erroneous result to the provided closure f.

fn collect(self) -> Collect<Self>

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Collect all of the values of this stream into a vector, returning a future representing the result of that computation.

fn concat2(self) -> Concat2<Self> where     Self::Item: Extend<<Self::Item as IntoIterator>::Item>,     Self::Item: IntoIterator,     Self::Item: Default,

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Concatenate all results of a stream into a single extendable destination, returning a future representing the end result.

fn concat(self) -> Concat<Self> where     Self::Item: Extend<<Self::Item as IntoIterator>::Item>,     Self::Item: IntoIterator,

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Deprecated since 0.1.14

: please use Stream::concat2 instead

Concatenate all results of a stream into a single extendable destination, returning a future representing the end result.

fn fold<F, T, Fut>(self, init: T, f: F) -> Fold<Self, F, Fut, T> where     F: FnMut(T, Self::Item) -> Fut,     Fut: IntoFuture<Item = T>,     Self::Error: From<<Fut as IntoFuture>::Error>,

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Execute an accumulating computation over a stream, collecting all the values into one final result.

fn flatten(self) -> Flatten<Self> where     Self::Item: Stream,     <Self::Item as Stream>::Error: From<Self::Error>,

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Flattens a stream of streams into just one continuous stream.

fn skip_while<P, R>(self, pred: P) -> SkipWhile<Self, P, R> where     P: FnMut(&Self::Item) -> R,     R: IntoFuture<Item = bool, Error = Self::Error>,

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Skip elements on this stream while the predicate provided resolves to true.

fn take_while<P, R>(self, pred: P) -> TakeWhile<Self, P, R> where     P: FnMut(&Self::Item) -> R,     R: IntoFuture<Item = bool, Error = Self::Error>,

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Take elements from this stream while the predicate provided resolves to true.

fn for_each<F, U>(self, f: F) -> ForEach<Self, F, U> where     F: FnMut(Self::Item) -> U,     U: IntoFuture<Item = (), Error = Self::Error>,

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Runs this stream to completion, executing the provided closure for each element on the stream.

fn from_err<E>(self) -> FromErr<Self, E> where     E: From<Self::Error>,

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Map this stream's error to any error implementing From for this stream's Error, returning a new stream.

fn take(self, amt: u64) -> Take<Self>

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Creates a new stream of at most amt items of the underlying stream.

fn skip(self, amt: u64) -> Skip<Self>

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Creates a new stream which skips amt items of the underlying stream.

fn fuse(self) -> Fuse<Self>

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Fuse a stream such that poll will never again be called once it has finished.

fn by_ref(&mut self) -> &mut Self

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Borrows a stream, rather than consuming it.

fn catch_unwind(self) -> CatchUnwind<Self> where     Self: UnwindSafe,

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Catches unwinding panics while polling the stream.

fn buffered(self, amt: usize) -> Buffered<Self> where     Self::Item: IntoFuture,     <Self::Item as IntoFuture>::Error == Self::Error,

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An adaptor for creating a buffered list of pending futures.

fn buffer_unordered(self, amt: usize) -> BufferUnordered<Self> where     Self::Item: IntoFuture,     <Self::Item as IntoFuture>::Error == Self::Error,

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An adaptor for creating a buffered list of pending futures (unordered).

fn merge<S>(self, other: S) -> Merge<Self, S> where     S: Stream<Error = Self::Error>,

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Deprecated

: functionality provided by select now

An adapter for merging the output of two streams.

fn zip<S>(self, other: S) -> Zip<Self, S> where     S: Stream<Error = Self::Error>,

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An adapter for zipping two streams together.

fn chain<S>(self, other: S) -> Chain<Self, S> where     S: Stream<Item = Self::Item, Error = Self::Error>,

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Adapter for chaining two stream.

fn peekable(self) -> Peekable<Self>

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Creates a new stream which exposes a peek method.

fn chunks(self, capacity: usize) -> Chunks<Self>

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An adaptor for chunking up items of the stream inside a vector.

fn select<S>(self, other: S) -> Select<Self, S> where     S: Stream<Item = Self::Item, Error = Self::Error>,

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Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first.

fn forward<S>(self, sink: S) -> Forward<Self, S> where     S: Sink<SinkItem = Self::Item>,     Self::Error: From<<S as Sink>::SinkError>,

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A future that completes after the given stream has been fully processed into the sink, including flushing.

fn split(self) -> (SplitSink<Self>, SplitStream<Self>) where     Self: Sink,

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Splits this Stream + Sink object into separate Stream and Sink objects.

fn inspect<F>(self, f: F) -> Inspect<Self, F> where     F: FnMut(&Self::Item),

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Do something with each item of this stream, afterwards passing it on.

fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where     F: FnMut(&Self::Error),

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Do something with the error of this stream, afterwards passing it on.

impl Debug for RecvStream

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fn fmt(&self, fmt: &mut Formatter) -> Result

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Formats the value using the given formatter.