poem_openapi::payload

Struct EventStream

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pub struct EventStream<T: Stream + Send + 'static> { /* private fields */ }
Expand description

An event stream payload.

Reference: https://github.com/OAI/OpenAPI-Specification/issues/396#issuecomment-894718960

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impl<T: Stream + Send + 'static> EventStream<T>

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pub fn new(stream: T) -> Self

Create an event stream payload.

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pub fn keep_alive(self, duration: Duration) -> Self

Set the keep alive interval.

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pub fn to_event(self, f: impl FnMut(T::Item) -> Event + Send + 'static) -> Self

Set a function used to convert the message to SSE event.

§Examples
use poem::web::sse::Event;
use poem_openapi::{payload::EventStream, types::ToJSON, Object};

#[derive(Debug, Object)]
struct MyEvent {
    value: i32,
}

EventStream::new(futures_util::stream::iter(vec![
    MyEvent { value: 1 },
    MyEvent { value: 2 },
    MyEvent { value: 3 },
]))
.to_event(|event| {
    let json = event.to_json_string();
    Event::message(json).event_type("push")
});

Trait Implementations§

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impl<T: Stream<Item = E> + Send + 'static, E: Type + ToJSON> ApiResponse for EventStream<T>

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fn meta() -> MetaResponses

Gets metadata of this response.
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fn register(registry: &mut Registry)

Register the schema contained in this response object to the registry.
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const BAD_REQUEST_HANDLER: bool = false

If true, it means that the response object has a custom bad request handler.
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fn from_parse_request_error(err: Error) -> Self

Convert poem::Error to this response object.
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impl<T: Stream<Item = E> + Send + 'static, E: Type + ToJSON + 'static> IntoResponse for EventStream<T>

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fn into_response(self) -> Response

Consume itself and return Response.
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fn with_header<K, V>(self, key: K, value: V) -> WithHeader<Self>
where K: TryInto<HeaderName>, V: TryInto<HeaderValue>, Self: Sized,

Wrap an impl IntoResponse to add a header. Read more
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fn with_content_type<V>(self, content_type: V) -> WithContentType<Self>
where V: TryInto<HeaderValue>, Self: Sized,

Wrap an impl IntoResponse to with a new content type. Read more
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fn with_status(self, status: StatusCode) -> WithStatus<Self>
where Self: Sized,

Wrap an impl IntoResponse to set a status code. Read more
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fn with_body(self, body: impl Into<Body>) -> WithBody<Self>
where Self: Sized,

Wrap an impl IntoResponse to set a body. Read more
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impl<T: Stream<Item = E> + Send + 'static, E: Type + ToJSON> Payload for EventStream<T>

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const CONTENT_TYPE: &'static str = "text/event-stream"

The content type of this payload.
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fn schema_ref() -> MetaSchemaRef

Gets schema reference of this payload.
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fn register(registry: &mut Registry)

Register the schema contained in this payload to the registry.
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fn check_content_type(content_type: &str) -> bool

Check the content type of incoming request

Auto Trait Implementations§

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impl<T> Freeze for EventStream<T>
where T: Freeze,

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impl<T> !RefUnwindSafe for EventStream<T>

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impl<T> Send for EventStream<T>

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impl<T> !Sync for EventStream<T>

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impl<T> Unpin for EventStream<T>
where T: Unpin,

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impl<T> !UnwindSafe for EventStream<T>

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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> Conv for T

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

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. 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> 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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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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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> IntoResult<T> for T
where T: IntoResponse,

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fn into_result(self) -> Result<T, Error>

Consumes this value returns a poem::Result<T>.
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impl<T> Pipe for T
where T: ?Sized,

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

Pipes by value. This is generally the method you want to use. Read more
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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
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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
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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
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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
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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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.
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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.
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impl<T> ResponseContent for T
where T: Payload,

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fn media_types() -> Vec<MetaMediaType>

Returns the media types in this content.
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fn register(registry: &mut Registry)

Register the schema contained in this content to the registry.
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> Tap for T

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

Immutable access to a value. Read more
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Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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where Self: BorrowMut<B>, B: ?Sized,

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where Self: AsMut<R>, R: ?Sized,

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where Self: Deref<Target = T>, T: ?Sized,

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where Self: DerefMut<Target = T> + Deref, T: ?Sized,

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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.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

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impl<T, U> TryFrom<U> for T
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type Error = Infallible

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

Performs the conversion.
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where S: Into<Dispatch>,

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