add request chain services

src/app.rs

@@ -2,7 +2,7 @@ use std::cell::RefCell;
 use std::marker::PhantomData;
 use std::rc::Rc;
 
-use actix_http::body::{Body, MessageBody};
+use actix_http::body::MessageBody;
 use actix_http::{Extensions, PayloadStream, Request, Response};
 use actix_router::{Path, ResourceDef, ResourceInfo, Router, Url};
 use actix_service::boxed::{self, BoxedNewService, BoxedService};
@@ -30,32 +30,45 @@ pub trait HttpServiceFactory<Request> {
 }
 
 /// Application builder
-pub struct App<P, B, T> {
-    services: Vec<(ResourceDef, HttpNewService<P>)>,
-    default: Option<Rc<HttpNewService<P>>>,
-    defaults: Vec<Rc<RefCell<Option<Rc<HttpNewService<P>>>>>>,
-    endpoint: T,
-    factory_ref: Rc<RefCell<Option<AppFactory<P>>>>,
+pub struct App<P, T>
+where
+    T: NewService<Request = ServiceRequest<PayloadStream>, Response = ServiceRequest<P>>,
+{
+    chain: T,
     extensions: Extensions,
     state: Vec<Box<StateFactory>>,
-    _t: PhantomData<(P, B)>,
+    _t: PhantomData<(P,)>,
 }
 
-impl App<PayloadStream, Body, AppEntry<PayloadStream>> {
-    /// Create application with empty state. Application can
+impl App<PayloadStream, AppChain> {
+    /// Create application builder with empty state. Application can
     /// be configured with a builder-like pattern.
     pub fn new() -> Self {
-        App::create()
+        App {
+            chain: AppChain,
+            extensions: Extensions::new(),
+            state: Vec::new(),
+            _t: PhantomData,
+        }
     }
 }
 
-impl Default for App<PayloadStream, Body, AppEntry<PayloadStream>> {
+impl Default for App<PayloadStream, AppChain> {
     fn default() -> Self {
         App::new()
     }
 }
 
-impl App<PayloadStream, Body, AppEntry<PayloadStream>> {
+impl<P, T> App<P, T>
+where
+    P: 'static,
+    T: NewService<
+        Request = ServiceRequest<PayloadStream>,
+        Response = ServiceRequest<P>,
+        Error = (),
+        InitError = (),
+    >,
+{
     /// Create application with specified state. Application can be
     /// configured with a builder-like pattern.
     ///
@@ -86,38 +99,172 @@ impl App<PayloadStream, Body, AppEntry<PayloadStream>> {
         self
     }
 
-    fn create() -> Self {
+    /// Configure resource for a specific path.
+    ///
+    /// Resources may have variable path segments. For example, a
+    /// resource with the path `/a/{name}/c` would match all incoming
+    /// requests with paths such as `/a/b/c`, `/a/1/c`, or `/a/etc/c`.
+    ///
+    /// A variable segment is specified in the form `{identifier}`,
+    /// where the identifier can be used later in a request handler to
+    /// access the matched value for that segment. This is done by
+    /// looking up the identifier in the `Params` object returned by
+    /// `HttpRequest.match_info()` method.
+    ///
+    /// By default, each segment matches the regular expression `[^{}/]+`.
+    ///
+    /// You can also specify a custom regex in the form `{identifier:regex}`:
+    ///
+    /// For instance, to route `GET`-requests on any route matching
+    /// `/users/{userid}/{friend}` and store `userid` and `friend` in
+    /// the exposed `Params` object:
+    ///
+    /// ```rust,ignore
+    /// # extern crate actix_web;
+    /// use actix_web::{http, App, HttpResponse};
+    ///
+    /// fn main() {
+    ///     let app = App::new().resource("/users/{userid}/{friend}", |r| {
+    ///         r.get(|r| r.to(|_| HttpResponse::Ok()));
+    ///         r.head(|r| r.to(|_| HttpResponse::MethodNotAllowed()))
+    ///     });
+    /// }
+    /// ```
+    pub fn resource<F, U, B>(self, path: &str, f: F) -> AppRouter<T, P, B, AppEntry<P>>
+    where
+        F: FnOnce(Resource<P>) -> Resource<P, U>,
+        U: NewService<
+                Request = ServiceRequest<P>,
+                Response = ServiceResponse,
+                Error = (),
+                InitError = (),
+            > + 'static,
+    {
+        let rdef = ResourceDef::new(path);
+        let resource = f(Resource::new());
+        let default = resource.get_default();
+
         let fref = Rc::new(RefCell::new(None));
+        AppRouter {
+            chain: self.chain,
+            services: vec![(rdef, boxed::new_service(resource.into_new_service()))],
+            default: None,
+            defaults: vec![default],
+            endpoint: AppEntry::new(fref.clone()),
+            factory_ref: fref,
+            extensions: self.extensions,
+            state: self.state,
+            _t: PhantomData,
+        }
+    }
+
+    /// Register a middleware.
+    pub fn middleware<M, B, F>(
+        self,
+        mw: F,
+    ) -> AppRouter<
+        T,
+        P,
+        B,
+        impl NewService<
+            Request = ServiceRequest<P>,
+            Response = ServiceResponse<B>,
+            Error = (),
+            InitError = (),
+        >,
+    >
+    where
+        M: NewTransform<
+            AppService<P>,
+            Request = ServiceRequest<P>,
+            Response = ServiceResponse<B>,
+            Error = (),
+            InitError = (),
+        >,
+        B: MessageBody,
+        F: IntoNewTransform<M, AppService<P>>,
+    {
+        let fref = Rc::new(RefCell::new(None));
+        let endpoint = ApplyNewService::new(mw, AppEntry::new(fref.clone()));
+        AppRouter {
+            endpoint,
+            chain: self.chain,
+            state: self.state,
+            services: Vec::new(),
+            default: None,
+            defaults: Vec::new(),
+            factory_ref: fref,
+            extensions: self.extensions,
+            _t: PhantomData,
+        }
+    }
+
+    /// Register a request modifier. It can modify any request parameters
+    /// including payload stream.
+    pub fn chain<C, F, P1>(
+        self,
+        chain: C,
+    ) -> App<
+        P1,
+        impl NewService<
+            Request = ServiceRequest<PayloadStream>,
+            Response = ServiceRequest<P1>,
+            Error = (),
+            InitError = (),
+        >,
+    >
+    where
+        C: NewService<
+            (),
+            Request = ServiceRequest<P>,
+            Response = ServiceRequest<P1>,
+            Error = (),
+            InitError = (),
+        >,
+        F: IntoNewService<C>,
+    {
+        let chain = self.chain.and_then(chain.into_new_service());
         App {
+            chain,
+            state: self.state,
+            extensions: self.extensions,
+            _t: PhantomData,
+        }
+    }
+
+    /// Complete applicatin chain configuration and start resource
+    /// configuration.
+    pub fn router<B>(self) -> AppRouter<T, P, B, AppEntry<P>> {
+        let fref = Rc::new(RefCell::new(None));
+        AppRouter {
+            chain: self.chain,
             services: Vec::new(),
             default: None,
             defaults: Vec::new(),
             endpoint: AppEntry::new(fref.clone()),
             factory_ref: fref,
-            extensions: Extensions::new(),
-            state: Vec::new(),
+            extensions: self.extensions,
+            state: self.state,
             _t: PhantomData,
         }
     }
 }
 
-// /// Application router builder
-// pub struct AppRouter<S, T, P> {
-//     services: Vec<(
-//         ResourceDef,
-//         BoxedHttpNewService<ServiceRequest<P>, Response>,
-//     )>,
-//     default: Option<Rc<HttpDefaultNewService<ServiceRequest<P>, Response>>>,
-//     defaults:
-//         Vec<Rc<RefCell<Option<Rc<HttpDefaultNewService<ServiceRequest<P>, Response>>>>>>,
-//     state: AppState<S>,
-//     endpoint: T,
-//     factory_ref: Rc<RefCell<Option<AppFactory<P>>>>,
-//     extensions: Extensions,
-//     _t: PhantomData<P>,
-// }
+/// Structure that follows the builder pattern for building application
+/// instances.
+pub struct AppRouter<C, P, B, T> {
+    chain: C,
+    services: Vec<(ResourceDef, HttpNewService<P>)>,
+    default: Option<Rc<HttpNewService<P>>>,
+    defaults: Vec<Rc<RefCell<Option<Rc<HttpNewService<P>>>>>>,
+    endpoint: T,
+    factory_ref: Rc<RefCell<Option<AppFactory<P>>>>,
+    extensions: Extensions,
+    state: Vec<Box<StateFactory>>,
+    _t: PhantomData<(P, B)>,
+}
 
-impl<P, B, T> App<P, B, T>
+impl<C, P, B, T> AppRouter<C, P, B, T>
 where
     P: 'static,
     B: MessageBody,
@@ -221,7 +368,8 @@ where
     pub fn middleware<M, B1, F>(
         self,
         mw: F,
-    ) -> App<
+    ) -> AppRouter<
+        C,
         P,
         B1,
         impl NewService<
@@ -243,14 +391,15 @@ where
         F: IntoNewTransform<M, T::Service>,
     {
         let endpoint = ApplyNewService::new(mw, self.endpoint);
-        App {
+        AppRouter {
             endpoint,
+            chain: self.chain,
             state: self.state,
             services: self.services,
             default: self.default,
-            defaults: Vec::new(),
+            defaults: self.defaults,
             factory_ref: self.factory_ref,
-            extensions: Extensions::new(),
+            extensions: self.extensions,
             _t: PhantomData,
         }
     }
@@ -292,8 +441,8 @@ where
     }
 }
 
-impl<T, P: 'static, B: MessageBody>
-    IntoNewService<AndThenNewService<AppStateFactory<P>, T, ()>> for App<P, B, T>
+impl<C, T, P: 'static, B: MessageBody>
+    IntoNewService<AndThenNewService<AppInit<C, P>, T, ()>> for AppRouter<C, P, B, T>
 where
     T: NewService<
         Request = ServiceRequest<P>,
@@ -301,8 +450,14 @@ where
         Error = (),
         InitError = (),
     >,
+    C: NewService<
+        Request = ServiceRequest<PayloadStream>,
+        Response = ServiceRequest<P>,
+        Error = (),
+        InitError = (),
+    >,
 {
-    fn into_new_service(self) -> AndThenNewService<AppStateFactory<P>, T, ()> {
+    fn into_new_service(self) -> AndThenNewService<AppInit<C, P>, T, ()> {
         // update resource default service
         if self.default.is_some() {
             for default in &self.defaults {
@@ -317,99 +472,15 @@ where
             services: Rc::new(self.services),
         });
 
-        AppStateFactory {
+        AppInit {
+            chain: self.chain,
             state: self.state,
             extensions: Rc::new(RefCell::new(Rc::new(self.extensions))),
-            _t: PhantomData,
         }
         .and_then(self.endpoint)
     }
 }
 
-/// Service factory to convert `Request` to a `ServiceRequest<S>`
-pub struct AppStateFactory<P> {
-    state: Vec<Box<StateFactory>>,
-    extensions: Rc<RefCell<Rc<Extensions>>>,
-    _t: PhantomData<P>,
-}
-
-impl<P: 'static> NewService for AppStateFactory<P> {
-    type Request = Request<P>;
-    type Response = ServiceRequest<P>;
-    type Error = ();
-    type InitError = ();
-    type Service = AppStateService<P>;
-    type Future = AppStateFactoryResult<P>;
-
-    fn new_service(&self, _: &()) -> Self::Future {
-        AppStateFactoryResult {
-            state: self.state.iter().map(|s| s.construct()).collect(),
-            extensions: self.extensions.clone(),
-            _t: PhantomData,
-        }
-    }
-}
-
-#[doc(hidden)]
-pub struct AppStateFactoryResult<P> {
-    state: Vec<Box<StateFactoryResult>>,
-    extensions: Rc<RefCell<Rc<Extensions>>>,
-    _t: PhantomData<P>,
-}
-
-impl<P> Future for AppStateFactoryResult<P> {
-    type Item = AppStateService<P>;
-    type Error = ();
-
-    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
-        if let Some(extensions) = Rc::get_mut(&mut *self.extensions.borrow_mut()) {
-            let mut idx = 0;
-            while idx < self.state.len() {
-                if let Async::Ready(_) = self.state[idx].poll_result(extensions)? {
-                    self.state.remove(idx);
-                } else {
-                    idx += 1;
-                }
-            }
-            if !self.state.is_empty() {
-                return Ok(Async::NotReady);
-            }
-        } else {
-            log::warn!("Multiple copies of app extensions exists");
-        }
-
-        Ok(Async::Ready(AppStateService {
-            extensions: self.extensions.borrow().clone(),
-            _t: PhantomData,
-        }))
-    }
-}
-
-/// Service to convert `Request` to a `ServiceRequest<S>`
-pub struct AppStateService<P> {
-    extensions: Rc<Extensions>,
-    _t: PhantomData<P>,
-}
-
-impl<P> Service for AppStateService<P> {
-    type Request = Request<P>;
-    type Response = ServiceRequest<P>;
-    type Error = ();
-    type Future = FutureResult<Self::Response, Self::Error>;
-
-    fn poll_ready(&mut self) -> Poll<(), Self::Error> {
-        Ok(Async::Ready(()))
-    }
-
-    fn call(&mut self, req: Request<P>) -> Self::Future {
-        ok(ServiceRequest::new(
-            Path::new(Url::new(req.uri().clone())),
-            req,
-            self.extensions.clone(),
-        ))
-    }
-}
-
 pub struct AppFactory<P> {
     services: Rc<Vec<(ResourceDef, HttpNewService<P>)>>,
 }
@@ -530,17 +601,6 @@ impl<P> Service for AppService<P> {
     }
 }
 
-pub struct AppServiceResponse(Box<Future<Item = ServiceResponse, Error = ()>>);
-
-impl Future for AppServiceResponse {
-    type Item = ServiceResponse;
-    type Error = ();
-
-    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
-        self.0.poll().map_err(|_| panic!())
-    }
-}
-
 #[doc(hidden)]
 pub struct AppEntry<P> {
     factory: Rc<RefCell<Option<AppFactory<P>>>>,
@@ -564,3 +624,151 @@ impl<P: 'static> NewService for AppEntry<P> {
         self.factory.borrow_mut().as_mut().unwrap().new_service(&())
     }
 }
+
+#[doc(hidden)]
+pub struct AppChain;
+
+impl NewService<()> for AppChain {
+    type Request = ServiceRequest<PayloadStream>;
+    type Response = ServiceRequest<PayloadStream>;
+    type Error = ();
+    type InitError = ();
+    type Service = AppChain;
+    type Future = FutureResult<Self::Service, Self::InitError>;
+
+    fn new_service(&self, _: &()) -> Self::Future {
+        ok(AppChain)
+    }
+}
+
+impl Service for AppChain {
+    type Request = ServiceRequest<PayloadStream>;
+    type Response = ServiceRequest<PayloadStream>;
+    type Error = ();
+    type Future = FutureResult<Self::Response, Self::Error>;
+
+    fn poll_ready(&mut self) -> Poll<(), Self::Error> {
+        Ok(Async::Ready(()))
+    }
+
+    fn call(&mut self, req: Self::Request) -> Self::Future {
+        ok(req)
+    }
+}
+
+/// Service factory to convert `Request` to a `ServiceRequest<S>`
+pub struct AppInit<C, P>
+where
+    C: NewService<Request = ServiceRequest<PayloadStream>, Response = ServiceRequest<P>>,
+{
+    chain: C,
+    state: Vec<Box<StateFactory>>,
+    extensions: Rc<RefCell<Rc<Extensions>>>,
+}
+
+impl<C, P: 'static> NewService for AppInit<C, P>
+where
+    C: NewService<
+        Request = ServiceRequest<PayloadStream>,
+        Response = ServiceRequest<P>,
+        InitError = (),
+    >,
+{
+    type Request = Request<PayloadStream>;
+    type Response = ServiceRequest<P>;
+    type Error = C::Error;
+    type InitError = C::InitError;
+    type Service = AppInitService<C::Service, P>;
+    type Future = AppInitResult<C, P>;
+
+    fn new_service(&self, _: &()) -> Self::Future {
+        AppInitResult {
+            chain: self.chain.new_service(&()),
+            state: self.state.iter().map(|s| s.construct()).collect(),
+            extensions: self.extensions.clone(),
+        }
+    }
+}
+
+#[doc(hidden)]
+pub struct AppInitResult<C, P>
+where
+    C: NewService<
+        Request = ServiceRequest<PayloadStream>,
+        Response = ServiceRequest<P>,
+        InitError = (),
+    >,
+{
+    chain: C::Future,
+    state: Vec<Box<StateFactoryResult>>,
+    extensions: Rc<RefCell<Rc<Extensions>>>,
+}
+
+impl<C, P> Future for AppInitResult<C, P>
+where
+    C: NewService<
+        Request = ServiceRequest<PayloadStream>,
+        Response = ServiceRequest<P>,
+        InitError = (),
+    >,
+{
+    type Item = AppInitService<C::Service, P>;
+    type Error = C::InitError;
+
+    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
+        if let Some(extensions) = Rc::get_mut(&mut *self.extensions.borrow_mut()) {
+            let mut idx = 0;
+            while idx < self.state.len() {
+                if let Async::Ready(_) = self.state[idx].poll_result(extensions)? {
+                    self.state.remove(idx);
+                } else {
+                    idx += 1;
+                }
+            }
+            if !self.state.is_empty() {
+                return Ok(Async::NotReady);
+            }
+        } else {
+            log::warn!("Multiple copies of app extensions exists");
+        }
+
+        let chain = futures::try_ready!(self.chain.poll());
+
+        Ok(Async::Ready(AppInitService {
+            chain,
+            extensions: self.extensions.borrow().clone(),
+        }))
+    }
+}
+
+/// Service to convert `Request` to a `ServiceRequest<S>`
+pub struct AppInitService<C, P>
+where
+    C: Service<Request = ServiceRequest<PayloadStream>, Response = ServiceRequest<P>>,
+{
+    chain: C,
+    extensions: Rc<Extensions>,
+}
+
+impl<C, P> Service for AppInitService<C, P>
+where
+    C: Service<Request = ServiceRequest<PayloadStream>, Response = ServiceRequest<P>>,
+{
+    type Request = Request<PayloadStream>;
+    type Response = ServiceRequest<P>;
+    type Error = C::Error;
+    type Future = C::Future;
+
+    fn poll_ready(&mut self) -> Poll<(), Self::Error> {
+        self.chain.poll_ready()
+    }
+
+    fn call(&mut self, req: Request<PayloadStream>) -> Self::Future {
+        let req = ServiceRequest::new(
+            Path::new(Url::new(req.uri().clone())),
+            req,
+            self.extensions.clone(),
+        );
+        self.chain.call(req)
+    }
+}

src/blocking.rs

@@ -24,7 +24,7 @@ lazy_static::lazy_static! {
         Mutex::new(
             threadpool::Builder::new()
                 .thread_name("actix-web".to_owned())
-                .num_threads(8)
+                .num_threads(default)
                 .build(),
         )
     };
@@ -45,11 +45,15 @@ pub enum BlockingError<E> {
 /// to result of the function execution.
 pub fn run<F, I, E>(f: F) -> CpuFuture<I, E>
 where
-    F: FnOnce() -> Result<I, E>,
+    F: FnOnce() -> Result<I, E> + Send + 'static,
+    I: Send + 'static,
+    E: Send + 'static,
 {
     let (tx, rx) = oneshot::channel();
-    POOL.with(move |pool| {
+    POOL.with(|pool| {
+        pool.execute(move || {
             let _ = tx.send(f());
+        })
     });
 
     CpuFuture { rx }

src/extractor.rs

@@ -1,3 +1,4 @@
+#![allow(dead_code)]
 use std::ops::{Deref, DerefMut};
 use std::rc::Rc;
 use std::{fmt, str};

src/lib.rs

@@ -1,4 +1,4 @@
-#![allow(clippy::type_complexity, dead_code, unused_variables)]
+#![allow(clippy::type_complexity)]
 
 mod app;
 mod extractor;
@@ -28,7 +28,7 @@ pub use crate::service::{ServiceRequest, ServiceResponse};
 pub use crate::state::State;
 
 pub mod dev {
-    pub use crate::app::AppService;
+    pub use crate::app::AppRouter;
     pub use crate::handler::{AsyncFactory, Extract, Factory, Handle};
     pub use crate::route::{Route, RouteBuilder};
     // pub use crate::info::ConnectionInfo;

src/middleware/compress.rs

@@ -117,7 +117,6 @@ where
 enum EncoderBody<B> {
     Body(B),
     Other(Box<dyn MessageBody>),
-    None,
 }
 
 pub struct Encoder<B> {
@@ -131,7 +130,6 @@ impl<B: MessageBody> MessageBody for Encoder<B> {
             match self.body {
                 EncoderBody::Body(ref b) => b.length(),
                 EncoderBody::Other(ref b) => b.length(),
-                EncoderBody::None => BodyLength::Empty,
             }
         } else {
             BodyLength::Stream
@@ -143,7 +141,6 @@ impl<B: MessageBody> MessageBody for Encoder<B> {
             let result = match self.body {
                 EncoderBody::Body(ref mut b) => b.poll_next()?,
                 EncoderBody::Other(ref mut b) => b.poll_next()?,
-                EncoderBody::None => return Ok(Async::Ready(None)),
             };
             match result {
                 Async::NotReady => return Ok(Async::NotReady),

src/route.rs

@@ -320,11 +320,11 @@ impl<P: 'static> RouteBuilder<P> {
     }
 }
 
-pub struct RouteServiceBuilder<P, T, U1, U2> {
-    service: T,
-    filters: Vec<Box<Filter>>,
-    _t: PhantomData<(P, U1, U2)>,
-}
+// pub struct RouteServiceBuilder<P, T, U1, U2> {
+//     service: T,
+//     filters: Vec<Box<Filter>>,
+//     _t: PhantomData<(P, U1, U2)>,
+// }
 
 // impl<T, S: 'static, U1, U2> RouteServiceBuilder<T, S, U1, U2>
 // where