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feat(service): introduce hyper-specific Service

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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
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12
src/proto/h2/server.rs
View File

@@ -5,10 +5,10 @@ use tokio_io::{AsyncRead, AsyncWrite};
use ::body::Payload;
use ::common::Exec;
use ::server::Service;
use ::service::Service;
use super::{PipeToSendStream, SendBuf};
use ::{Body, Request, Response};
use ::{Body, Response};
pub(crate) struct Server<T, S, B>
where
@@ -39,7 +39,7 @@ where
impl<T, S, B> Server<T, S, B>
where
T: AsyncRead + AsyncWrite,
S: Service<Request=Request<Body>, Response=Response<B>>,
S: Service<ReqBody=Body, ResBody=B>,
S::Error: Into<Box<::std::error::Error + Send + Sync>>,
S::Future: Send + 'static,
B: Payload,
@@ -62,7 +62,7 @@ where
impl<T, S, B> Future for Server<T, S, B>
where
T: AsyncRead + AsyncWrite,
S: Service<Request=Request<Body>, Response=Response<B>>,
S: Service<ReqBody=Body, ResBody=B>,
S::Error: Into<Box<::std::error::Error + Send + Sync>>,
S::Future: Send + 'static,
B: Payload,
@@ -96,8 +96,8 @@ where
fn poll_server<S>(&mut self, service: &mut S, exec: &Exec) -> Poll<(), ::Error>
where
S: Service<
Request=Request<Body>,
Response=Response<B>,
ReqBody=Body,
ResBody=B,
>,
S::Error: Into<Box<::std::error::Error + Send + Sync>>,
S::Future: Send + 'static,