twitter_stream/
service.rs

1//! A trait alias for [`Service`](tower_service::Service).
2
3use http::{Request, Response};
4use http_body::Body;
5use tower_service::Service;
6
7use private::Sealed;
8
9#[cfg_attr(not(feature = "hyper"), allow(intra_doc_link_resolution_failure))]
10/// An HTTP client (like [`hyper::Client`](hyper_pkg::client::Client)).
11///
12/// This is just an alias for [`tower_service::Service`](tower_service::Service)
13/// introduced to reduce the number of type parameters in `Builder::listen_with_client`.
14pub trait HttpService<B>: Service<Request<B>> + Sealed<B> {
15    /// Body of the responses given by the service.
16    type ResponseBody: Body;
17}
18
19impl<S, ReqB, ResB> HttpService<ReqB> for S
20where
21    S: Service<Request<ReqB>, Response = Response<ResB>> + ?Sized,
22    ResB: Body,
23{
24    type ResponseBody = ResB;
25}
26
27mod private {
28    use http::{Request, Response};
29    use http_body::Body;
30    use tower_service::Service;
31
32    pub trait Sealed<B> {}
33
34    impl<S, ReqB, ResB> Sealed<ReqB> for S
35    where
36        S: Service<Request<ReqB>, Response = Response<ResB>> + ?Sized,
37        ResB: Body,
38    {
39    }
40}