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#![cfg(unix)]
extern crate futures;
extern crate tokio_core;
extern crate tokio_proto;
extern crate tokio_service;
extern crate tokio_uds;
use std::io;
use std::path::{Path, PathBuf};
use std::marker::PhantomData;
use std::sync::Arc;
use futures::stream::Stream;
use futures::future::{Then, Future};
use tokio_core::reactor::{Core, Handle};
use tokio_proto::{BindClient, BindServer};
use tokio_service::{NewService, Service};
use tokio_uds::{UnixListener, UnixStream};
pub struct UnixServer<Kind, P> {
_kind: PhantomData<Kind>,
proto: Arc<P>,
path: PathBuf,
}
impl<Kind, P> UnixServer<Kind, P>
where P: BindServer<Kind, UnixStream> + Send + Sync + 'static
{
pub fn new(protocol: P, path: PathBuf) -> UnixServer<Kind, P> {
UnixServer {
_kind: PhantomData,
proto: Arc::new(protocol),
path: path.into(),
}
}
pub fn path(&mut self, path: PathBuf) {
self.path = path.into();
}
pub fn serve<S>(&self, new_service: S)
where S: NewService + Send + Sync + 'static,
S::Instance: 'static,
P::ServiceError: 'static,
P::ServiceResponse: 'static,
P::ServiceRequest: 'static,
S::Request: From<P::ServiceRequest>,
S::Response: Into<P::ServiceResponse>,
S::Error: Into<P::ServiceError>
{
let new_service = Arc::new(new_service);
self.with_handle(move |_| new_service.clone())
}
pub fn with_handle<F, S>(&self, new_service: F)
where F: Fn(&Handle) -> S + Send + Sync + 'static,
S: NewService + Send + Sync + 'static,
S::Instance: 'static,
P::ServiceError: 'static,
P::ServiceResponse: 'static,
P::ServiceRequest: 'static,
S::Request: From<P::ServiceRequest>,
S::Response: Into<P::ServiceResponse>,
S::Error: Into<P::ServiceError>
{
let proto = self.proto.clone();
let new_service = Arc::new(new_service);
let path = self.path.clone();
serve(proto, path, &*new_service);
}
}
fn serve<P, Kind, F, S>(binder: Arc<P>, path: PathBuf, new_service: &F)
where P: BindServer<Kind, UnixStream>,
F: Fn(&Handle) -> S,
S: NewService + Send + Sync,
S::Instance: 'static,
P::ServiceError: 'static,
P::ServiceResponse: 'static,
P::ServiceRequest: 'static,
S::Request: From<P::ServiceRequest>,
S::Response: Into<P::ServiceResponse>,
S::Error: Into<P::ServiceError>
{
struct WrapService<S, Request, Response, Error> {
inner: S,
_marker: PhantomData<fn() -> (Request, Response, Error)>,
}
impl<S, Request, Response, Error> Service for WrapService<S, Request, Response, Error>
where S: Service,
S::Request: From<Request>,
S::Response: Into<Response>,
S::Error: Into<Error>
{
type Request = Request;
type Response = Response;
type Error = Error;
type Future = Then<S::Future,
Result<Response, Error>,
fn(Result<S::Response, S::Error>) -> Result<Response, Error>>;
fn call(&self, req: Request) -> Self::Future {
fn change_types<A, B, C, D>(r: Result<A, B>) -> Result<C, D>
where A: Into<C>,
B: Into<D>
{
match r {
Ok(e) => Ok(e.into()),
Err(e) => Err(e.into()),
}
}
self.inner.call(S::Request::from(req)).then(change_types)
}
}
let mut core = Core::new().unwrap();
let handle = core.handle();
let new_service = new_service(&handle);
let listener = UnixListener::bind(path, &handle).unwrap();
let server = listener.incoming().for_each(move |(socket, _)| {
let service = try!(new_service.new_service());
binder.bind_server(&handle,
socket,
WrapService {
inner: service,
_marker: PhantomData,
});
Ok(())
});
core.run(server).unwrap();
}
pub struct UnixClient<Kind, P> {
_kind: PhantomData<Kind>,
proto: Arc<P>,
}
impl<Kind, P> UnixClient<Kind, P>
where P: BindClient<Kind, UnixStream>
{
pub fn new(protocol: P) -> UnixClient<Kind, P> {
UnixClient {
_kind: PhantomData,
proto: Arc::new(protocol),
}
}
pub fn connect<T>(&self, path: T, handle: &Handle) -> io::Result<P::BindClient>
where T: AsRef<Path>
{
Ok(self.proto.bind_client(handle, UnixStream::connect(path, handle)?))
}
}