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use http_service::Body;
use crate::body;
pub type Response = http::Response<Body>;
pub trait IntoResponse: Send + Sized {
fn into_response(self) -> Response;
fn with_status(self, status: http::status::StatusCode) -> WithStatus<Self> {
WithStatus {
inner: self,
status,
}
}
}
impl IntoResponse for () {
fn into_response(self) -> Response {
http::Response::builder()
.status(http::status::StatusCode::OK)
.body(Body::empty())
.unwrap()
}
}
impl IntoResponse for Vec<u8> {
fn into_response(self) -> Response {
http::Response::builder()
.status(http::status::StatusCode::OK)
.header("Content-Type", "application/octet-stream")
.body(Body::from(self))
.unwrap()
}
}
impl IntoResponse for body::Bytes {
fn into_response(self) -> Response {
self.to_vec().into_response()
}
}
impl IntoResponse for String {
fn into_response(self) -> Response {
http::Response::builder()
.status(http::status::StatusCode::OK)
.header("Content-Type", "text/plain; charset=utf-8")
.body(Body::from(self.into_bytes()))
.unwrap()
}
}
impl IntoResponse for &'_ str {
fn into_response(self) -> Response {
self.to_string().into_response()
}
}
impl IntoResponse for http::status::StatusCode {
fn into_response(self) -> Response {
http::Response::builder()
.status(self)
.body(Body::empty())
.unwrap()
}
}
impl<T: IntoResponse, U: IntoResponse> IntoResponse for Result<T, U> {
fn into_response(self) -> Response {
match self {
Ok(r) => r.into_response(),
Err(r) => {
let res = r.into_response();
if res.status().is_success() {
panic!(
"Attempted to yield error response with success code {:?}",
res.status()
)
}
res
}
}
}
}
impl<T: Send + Into<Body>> IntoResponse for http::Response<T> {
fn into_response(self) -> Response {
self.map(Into::into)
}
}
pub struct WithStatus<R> {
inner: R,
status: http::status::StatusCode,
}
impl<R: IntoResponse> IntoResponse for WithStatus<R> {
fn into_response(self) -> Response {
let mut resp = self.inner.into_response();
*resp.status_mut() = self.status;
resp
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_status() {
let resp = "foo"
.with_status(http::status::StatusCode::NOT_FOUND)
.into_response();
assert_eq!(resp.status(), http::status::StatusCode::NOT_FOUND);
}
#[test]
fn byte_vec_content_type() {
let resp = String::from("foo").into_bytes().into_response();
assert_eq!(resp.headers()["Content-Type"], "application/octet-stream");
}
#[test]
fn string_content_type() {
let resp = String::from("foo").into_response();
assert_eq!(resp.headers()["Content-Type"], "text/plain; charset=utf-8");
}
}