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use crate::error::{ErrorKind, ResultExt};
use crate::headers::Headers;
use crate::StatusCode;
use bytes::Bytes;
use futures::{Stream, StreamExt};
use std::fmt::Debug;
use std::pin::Pin;
pub(crate) type PinnedStream = Pin<Box<dyn Stream<Item = crate::Result<Bytes>> + Send + Sync>>;
pub struct Response {
status: StatusCode,
headers: Headers,
body: ResponseBody,
}
impl Response {
pub fn new(status: StatusCode, headers: Headers, stream: PinnedStream) -> Self {
Self {
status,
headers,
body: ResponseBody::new(stream),
}
}
pub fn status(&self) -> StatusCode {
self.status
}
pub fn headers(&self) -> &Headers {
&self.headers
}
pub fn deconstruct(self) -> (StatusCode, Headers, ResponseBody) {
(self.status, self.headers, self.body)
}
pub fn into_body(self) -> ResponseBody {
self.body
}
}
impl std::fmt::Debug for Response {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Response")
.field("status", &self.status)
.field("headers", &self.headers)
.field("body", &"<BODY>")
.finish()
}
}
#[derive(Debug, Clone)]
pub struct CollectedResponse {
status: StatusCode,
headers: Headers,
body: Bytes,
}
impl CollectedResponse {
pub fn new(status: StatusCode, headers: Headers, body: Bytes) -> Self {
Self {
status,
headers,
body,
}
}
pub fn status(&self) -> &StatusCode {
&self.status
}
pub fn headers(&self) -> &Headers {
&self.headers
}
pub fn body(&self) -> &Bytes {
&self.body
}
pub async fn from_response(response: Response) -> crate::Result<Self> {
let (status, headers, body) = response.deconstruct();
let body = body.collect().await?;
Ok(Self::new(status, headers, body))
}
}
#[pin_project::pin_project]
pub struct ResponseBody(#[pin] PinnedStream);
impl ResponseBody {
fn new(stream: PinnedStream) -> Self {
Self(stream)
}
pub async fn collect(mut self) -> crate::Result<Bytes> {
let mut final_result = Vec::new();
while let Some(res) = self.0.next().await {
final_result.extend(&res?);
}
Ok(final_result.into())
}
pub async fn collect_string(self) -> crate::Result<String> {
std::str::from_utf8(&self.collect().await?)
.context(
ErrorKind::DataConversion,
"response body was not utf-8 like expected",
)
.map(ToOwned::to_owned)
}
}
impl Stream for ResponseBody {
type Item = crate::Result<Bytes>;
fn poll_next(
self: Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<Option<Self::Item>> {
let this = self.project();
this.0.poll_next(cx)
}
}
impl Debug for ResponseBody {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_str("ResonseBody")
}
}