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use core::{Request, Response};
use hyper::rt::Future;
use proto::MiddleWare;
pub type FutureResponse = Box<Future<Item = Response, Error = Response> + Send>;
pub trait ArcService: ArcServiceClone + Send + Sync {
fn call(&self, req: Request, res: Response) -> FutureResponse;
}
#[cfg(not(feature = "unstable"))]
impl<T> ArcService for T
where
T: Fn(Request, Response) -> FutureResponse + Send + Sync + Clone + 'static,
{
fn call(&self, req: Request, res: Response) -> FutureResponse {
(self)(req, res)
}
}
pub trait ArcServiceClone {
fn clone_service(&self) -> Box<ArcService>;
}
impl<T> ArcServiceClone for T
where
T: 'static + ArcService + Clone,
{
fn clone_service(&self) -> Box<ArcService> {
Box::new(self.clone())
}
}
impl Clone for Box<ArcService> {
fn clone(&self) -> Self {
self.clone_service()
}
}
#[derive(Clone)]
pub struct ArcHandler {
pub before: Option<Box<MiddleWare<Request>>>,
pub handler: Option<Box<ArcService>>,
pub after: Option<Box<MiddleWare<Response>>>,
}
impl ArcHandler {
pub fn new<T: 'static + ArcService>(h: T) -> Self {
Self {
before: None,
handler: Some(Box::new(h)),
after: None,
}
}
pub fn before<T: 'static + MiddleWare<Request>>(&mut self, before: T) {
self.before = Some(Box::new(before));
}
pub fn after<T: 'static + MiddleWare<Response>>(&mut self, after: T) {
self.after = Some(Box::new(after));
}
}
impl ArcService for ArcHandler {
fn call(&self, req: Request, res: Response) -> FutureResponse {
if self.before.is_some() && self.after.is_none() {
let before = match self.before {
Some(ref before) => before.clone(),
_ => unreachable!(),
};
let handler = self.handler.clone().unwrap();
let responsefuture = before.call(req).and_then(move |req| handler.call(req, res));
return Box::new(responsefuture);
}
if self.before.is_none() && self.after.is_some() {
let after = match self.after {
Some(ref after) => after.clone(),
_ => unreachable!(),
};
let handler = self.handler.clone().unwrap();
let responsefuture = handler.call(req, res).then(move |res| {
match res {
Ok(res) | Err(res) => after.call(res),
}
});
return Box::new(responsefuture);
}
if self.before.is_some() && self.after.is_some() {
let before = match self.before {
Some(ref before) => before.clone(),
_ => unreachable!(),
};
let handler = self.handler.clone().unwrap();
let after = match self.after {
Some(ref after) => after.clone(),
_ => unreachable!(),
};
let responsefuture = before
.call(req)
.and_then(move |req| handler.call(req, res))
.then(move |res| {
match res {
Ok(res) | Err(res) => after.call(res),
}
});
return Box::new(responsefuture);
}
return self
.handler
.clone()
.expect("No service Supplied")
.call(req, res);
}
}