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use futures::{future, TryFutureExt, TryStreamExt};
use futures::stream;
use futures::stream::Stream;
use futures::stream::StreamExt;
use std::future::Future;
use bytes::Bytes;
use crate::message::SimpleHttpMessage;
use crate::solicit::header::Headers;
use crate::solicit_async::*;
use crate::data_or_headers::DataOrHeaders;
use crate::data_or_headers_with_flag::DataOrHeadersWithFlag;
use crate::data_or_headers_with_flag::DataOrHeadersWithFlagStream;
use crate::data_or_trailers::*;
use crate::error;
use crate::result;
use futures::task::Context;
use std::pin::Pin;
use std::task::Poll;
pub struct Response(pub HttpFutureSend<(Headers, HttpStreamAfterHeaders)>);
impl Response {
pub fn new<F>(future: F) -> Response
where
F: Future<Output = result::Result<(Headers, HttpStreamAfterHeaders)>> + Send + 'static,
{
Response(Box::pin(future))
}
pub fn headers_and_stream(headers: Headers, stream: HttpStreamAfterHeaders) -> Response {
Response::new(future::ok((headers, stream)))
}
pub fn headers_and_bytes_stream<S>(headers: Headers, content: S) -> Response
where
S: Stream<Item = result::Result<Bytes>> + Send + 'static,
{
Response::headers_and_stream(headers, HttpStreamAfterHeaders::bytes(content))
}
pub fn headers(headers: Headers) -> Response {
Response::headers_and_bytes_stream(headers, stream::empty())
}
pub fn headers_and_bytes<B: Into<Bytes>>(header: Headers, content: B) -> Response {
Response::headers_and_bytes_stream(header, stream::once(future::ok(content.into())))
}
pub fn message(message: SimpleHttpMessage) -> Response {
Response::headers_and_bytes(message.headers, message.body)
}
pub fn found_200_plain_text(body: &str) -> Response {
Response::message(SimpleHttpMessage::found_200_plain_text(body))
}
pub fn not_found_404() -> Response {
Response::headers(Headers::not_found_404())
}
pub fn redirect_302(location: &str) -> Response {
let mut headers = Headers::new_status(302);
headers.add("location", location);
Response::headers(headers)
}
pub fn from_stream<S>(mut stream: S) -> Response
where
S: Stream<Item = result::Result<DataOrHeadersWithFlag>> + Unpin + Send + 'static,
{
Response::new(async move {
let (first, rem) = match stream.try_next().await? {
Some(part) => match part.content {
DataOrHeaders::Headers(headers) => {
(headers, HttpStreamAfterHeaders::from_parts(stream))
}
DataOrHeaders::Data(..) => {
return Err(error::Error::InvalidFrame("data before headers".to_owned()))
}
},
None => {
return Err(error::Error::InvalidFrame(
"empty response, expecting headers".to_owned(),
))
}
};
Ok((first, rem))
})
}
pub fn err(err: error::Error) -> Response {
Response::new(future::err(err))
}
pub fn into_stream_flag(self) -> HttpFutureStreamSend<DataOrHeadersWithFlag> {
Box::pin(
self.0
.map_ok(|(headers, rem)| {
let header = stream::once(future::ok(
DataOrHeadersWithFlag::intermediate_headers(headers),
));
let rem = rem.into_flag_stream();
header.chain(rem)
})
.try_flatten_stream(),
)
}
pub fn into_stream(self) -> HttpFutureStreamSend<DataOrHeaders> {
Box::pin(TryStreamExt::map_ok(self.into_stream_flag(), |c| c.content))
}
pub fn into_part_stream(self) -> DataOrHeadersWithFlagStream {
DataOrHeadersWithFlagStream::new(self.into_stream_flag())
}
pub fn collect(self) -> HttpFutureSend<SimpleHttpMessage> {
Box::pin(
self.into_stream()
.try_fold(SimpleHttpMessage::new(), |mut c, p| {
c.add(p);
future::ok::<_, error::Error>(c)
}),
)
}
}
impl Future for Response {
type Output = result::Result<(Headers, HttpStreamAfterHeaders)>;
fn poll(
mut self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<result::Result<(Headers, HttpStreamAfterHeaders)>> {
Pin::new(&mut self.0).poll(cx)
}
}