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use crate::{Code, Status};
use futures::{Future, Poll};
use http::header;
#[derive(Debug)]
pub struct ResponseFuture {
status: Option<Status>,
}
impl ResponseFuture {
pub(crate) fn new(msg: String) -> Self {
ResponseFuture {
status: Some(Status::new(Code::Unimplemented, msg)),
}
}
}
impl Future for ResponseFuture {
type Item = http::Response<()>;
type Error = crate::error::Never;
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
let status = self.status.take().expect("polled after complete");
let mut response = http::Response::new(());
response.headers_mut().insert(
header::CONTENT_TYPE,
header::HeaderValue::from_static("application/grpc"),
);
status
.add_header(response.headers_mut())
.expect("generated unimplemented message should be valid");
Ok(response.into())
}
}