feat(service): introduce hyper-specific Service

This introduces the `hyper::service` module, which replaces
`tokio-service`.

Since the trait is specific to hyper, its associated
types have been adjusted. It didn't make sense to need to define
`Service<Request=http::Request>`, since we already know the context is
HTTP. Instead, the request and response bodies are associated types now,
and slightly stricter bounds have been placed on `Error`.

The helpers `service_fn` and `service_fn_ok` should be sufficient for
now to ease creating `Service`s.

The `NewService` trait now allows service creation to also be
asynchronous.

These traits are similar to `tower` in nature, and possibly will be
replaced completely by it in the future. For now, hyper defining its own
allows the traits to have better context, and prevents breaking changes
in `tower` from affecting hyper.

Closes #1461

BREAKING CHANGE: The `Service` trait has changed: it has some changed
  associated types, and `call` is now bound to `&mut self`.

  The `NewService` trait has changed: it has some changed associated
  types, and `new_service` now returns a `Future`.

  `Client` no longer implements `Service` for now.

  `hyper::server::conn::Serve` now returns `Connecting` instead of
  `Connection`s, since `new_service` can now return a `Future`. The
  `Connecting` is a future wrapping the new service future, returning
  a `Connection` afterwards. In many cases, `Future::flatten` can be
  used.
This commit is contained in:
Sean McArthur
2018-04-17 13:03:59 -07:00
parent 71a15c25f5
commit 2dc6202fe7
24 changed files with 749 additions and 582 deletions

View File

@@ -11,7 +11,6 @@ use futures::sync::oneshot;
use http::{Method, Request, Response, Uri, Version};
use http::header::{Entry, HeaderValue, HOST};
use http::uri::Scheme;
pub use tokio_service::Service;
use body::{Body, Payload};
use common::Exec;
@@ -295,22 +294,6 @@ where C: Connect + Sync + 'static,
}
}
impl<C, B> Service for Client<C, B>
where C: Connect + 'static,
C::Future: 'static,
B: Payload + Send + 'static,
B::Data: Send,
{
type Request = Request<B>;
type Response = Response<Body>;
type Error = ::Error;
type Future = FutureResponse;
fn call(&self, req: Self::Request) -> Self::Future {
self.request(req)
}
}
impl<C, B> Clone for Client<C, B> {
fn clone(&self) -> Client<C, B> {
Client {