add nested scope support

src/application.rs

@@ -69,9 +69,11 @@ impl<S: 'static> HttpApplication<S> {
                 };
 
                 if m {
-                    let path: &'static str = unsafe {
+                    let prefix_len = inner.prefix + prefix.len();
-                        &*(&req.path()[inner.prefix + prefix.len()..] as *const _)
+                    let path: &'static str =
-                    };
+                        unsafe { &*(&req.path()[prefix_len..] as *const _) };
+
+                    req.set_prefix_len(prefix_len as u16);
                     if path.is_empty() {
                         req.match_info_mut().add("tail", "/");
                     } else {
@@ -881,8 +883,9 @@ mod tests {
         );
 
         let req = TestRequest::with_uri("/app/test").finish();
-        let resp = app.run(req);
+        let resp = app.run(req.clone());
         assert_eq!(resp.as_response().unwrap().status(), StatusCode::OK);
+        assert_eq!(req.prefix_len(), 9);
 
         let req = TestRequest::with_uri("/app/test/").finish();
         let resp = app.run(req);

src/httprequest.rs

@@ -25,20 +25,27 @@ use router::{Resource, Router};
 use server::helpers::SharedHttpInnerMessage;
 use uri::Url as InnerUrl;
 
+bitflags! {
+    pub(crate) struct MessageFlags: u8 {
+        const QUERY = 0b0000_0001;
+        const KEEPALIVE = 0b0000_0010;
+    }
+}
+
 pub struct HttpInnerMessage {
     pub version: Version,
     pub method: Method,
     pub(crate) url: InnerUrl,
+    pub(crate) flags: MessageFlags,
     pub headers: HeaderMap,
     pub extensions: Extensions,
     pub params: Params<'static>,
     pub cookies: Option<Vec<Cookie<'static>>>,
     pub query: Params<'static>,
-    pub query_loaded: bool,
     pub addr: Option<SocketAddr>,
     pub payload: Option<Payload>,
     pub info: Option<ConnectionInfo<'static>>,
-    pub keep_alive: bool,
+    pub prefix: u16,
     resource: RouterResource,
 }
 
@@ -55,15 +62,15 @@ impl Default for HttpInnerMessage {
             url: InnerUrl::default(),
             version: Version::HTTP_11,
             headers: HeaderMap::with_capacity(16),
+            flags: MessageFlags::empty(),
             params: Params::new(),
             query: Params::new(),
-            query_loaded: false,
             addr: None,
             cookies: None,
             payload: None,
             extensions: Extensions::new(),
             info: None,
-            keep_alive: true,
+            prefix: 0,
             resource: RouterResource::Notset,
         }
     }
@@ -73,7 +80,7 @@ impl HttpInnerMessage {
     /// Checks if a connection should be kept alive.
     #[inline]
     pub fn keep_alive(&self) -> bool {
-        self.keep_alive
+        self.flags.contains(MessageFlags::KEEPALIVE)
     }
 
     #[inline]
@@ -83,10 +90,10 @@ impl HttpInnerMessage {
         self.params.clear();
         self.addr = None;
         self.info = None;
-        self.query_loaded = false;
+        self.flags = MessageFlags::empty();
         self.cookies = None;
         self.payload = None;
-        self.keep_alive = true;
+        self.prefix = 0;
         self.resource = RouterResource::Notset;
     }
 }
@@ -115,12 +122,12 @@ impl HttpRequest<()> {
                 payload,
                 params: Params::new(),
                 query: Params::new(),
-                query_loaded: false,
                 extensions: Extensions::new(),
                 cookies: None,
                 addr: None,
                 info: None,
-                keep_alive: true,
+                prefix: 0,
+                flags: MessageFlags::empty(),
                 resource: RouterResource::Notset,
             }),
             None,
@@ -234,12 +241,13 @@ impl<S> HttpRequest<S> {
     }
 
     #[doc(hidden)]
-    pub fn prefix_len(&self) -> usize {
+    pub fn prefix_len(&self) -> u16 {
-        if let Some(router) = self.router() {
+        self.as_ref().prefix as u16
-            router.prefix().len()
-        } else {
-            0
     }
+
+    #[doc(hidden)]
+    pub fn set_prefix_len(&mut self, len: u16) {
+        self.as_mut().prefix = len;
     }
 
     /// Read the Request Uri.
@@ -367,14 +375,16 @@ impl<S> HttpRequest<S> {
         self.as_mut().addr = addr;
     }
 
+    #[doc(hidden)]
+    #[deprecated(since = "0.6.0", note = "please use `Query<T>` extractor")]
     /// Get a reference to the Params object.
     /// Params is a container for url query parameters.
     pub fn query(&self) -> &Params {
-        if !self.as_ref().query_loaded {
+        if !self.as_ref().flags.contains(MessageFlags::QUERY) {
+            self.as_mut().flags.insert(MessageFlags::QUERY);
             let params: &mut Params =
                 unsafe { mem::transmute(&mut self.as_mut().query) };
             params.clear();
-            self.as_mut().query_loaded = true;
             for (key, val) in form_urlencoded::parse(self.query_string().as_ref()) {
                 params.add(key, val);
             }
@@ -443,7 +453,7 @@ impl<S> HttpRequest<S> {
 
     /// Checks if a connection should be kept alive.
     pub fn keep_alive(&self) -> bool {
-        self.as_ref().keep_alive()
+        self.as_ref().flags.contains(MessageFlags::KEEPALIVE)
     }
 
     /// Check if request requires connection upgrade

src/param.rs

@@ -42,6 +42,22 @@ impl<'a> Params<'a> {
         self.0.push((name.into(), value.into()));
     }
 
+    pub(crate) fn set<N, V>(&mut self, name: N, value: V)
+    where
+        N: Into<Cow<'a, str>>,
+        V: Into<Cow<'a, str>>,
+    {
+        let name = name.into();
+        let value = value.into();
+        for item in &mut self.0 {
+            if item.0 == name {
+                item.1 = value;
+                return;
+            }
+        }
+        self.0.push((name, value));
+    }
+
     /// Check if there are any matched patterns
     pub fn is_empty(&self) -> bool {
         self.0.is_empty()

src/router.rs

@@ -84,6 +84,7 @@ impl Router {
         for (idx, pattern) in self.0.patterns.iter().enumerate() {
             if pattern.match_with_params(route_path, req.match_info_mut()) {
                 req.set_resource(idx);
+                req.set_prefix_len(self.0.prefix_len as u16);
                 return Some(idx);
             }
         }

src/scope.rs

@@ -14,6 +14,7 @@ use middleware::{Finished as MiddlewareFinished, Middleware,
 use resource::ResourceHandler;
 use router::Resource;
 
+type Route<S> = UnsafeCell<Box<RouteHandler<S>>>;
 type ScopeResources<S> = Rc<Vec<(Resource, Rc<UnsafeCell<ResourceHandler<S>>>)>>;
 
 /// Resources scope
@@ -42,7 +43,7 @@ type ScopeResources<S> = Rc<Vec<(Resource, Rc<UnsafeCell<ResourceHandler<S>>>)>>
 ///  * /app/path3 - `HEAD` requests
 ///
 pub struct Scope<S: 'static> {
-    handler: Option<UnsafeCell<Box<RouteHandler<S>>>>,
+    nested: Vec<(String, Route<S>)>,
     middlewares: Rc<Vec<Box<Middleware<S>>>>,
     default: Rc<UnsafeCell<ResourceHandler<S>>>,
     resources: ScopeResources<S>,
@@ -57,17 +58,14 @@ impl<S: 'static> Default for Scope<S> {
 impl<S: 'static> Scope<S> {
     pub fn new() -> Scope<S> {
         Scope {
-            handler: None,
+            nested: Vec::new(),
             resources: Rc::new(Vec::new()),
             middlewares: Rc::new(Vec::new()),
             default: Rc::new(UnsafeCell::new(ResourceHandler::default_not_found())),
         }
     }
 
-    /// Create scope with new state.
+    /// Create nested scope with new state.
-    ///
-    /// Scope can have only one nested scope with new state. Every call
-    /// destroys previously created scope with state.
     ///
     /// ```rust
     /// # extern crate actix_web;
@@ -82,28 +80,78 @@ impl<S: 'static> Scope<S> {
     /// fn main() {
     ///     let app = App::new()
     ///         .scope("/app", |scope| {
-    ///             scope.with_state(AppState, |scope| {
+    ///             scope.with_state("/state2", AppState, |scope| {
     ///                scope.resource("/test1", |r| r.f(index))
     ///             })
     ///         });
     /// }
     /// ```
-    pub fn with_state<F, T: 'static>(mut self, state: T, f: F) -> Scope<S>
+    pub fn with_state<F, T: 'static>(mut self, path: &str, state: T, f: F) -> Scope<S>
     where
         F: FnOnce(Scope<T>) -> Scope<T>,
     {
         let scope = Scope {
-            handler: None,
+            nested: Vec::new(),
             resources: Rc::new(Vec::new()),
             middlewares: Rc::new(Vec::new()),
             default: Rc::new(UnsafeCell::new(ResourceHandler::default_not_found())),
         };
         let scope = f(scope);
 
-        self.handler = Some(UnsafeCell::new(Box::new(Wrapper {
+        let mut path = path.trim().trim_right_matches('/').to_owned();
+        if !path.is_empty() && !path.starts_with('/') {
+            path.insert(0, '/')
+        }
+
+        let handler = UnsafeCell::new(Box::new(Wrapper {
             scope,
             state: Rc::new(state),
-        })));
+        }));
+        self.nested.push((path, handler));
+
+        self
+    }
+
+    /// Create nested scope.
+    ///
+    /// ```rust
+    /// # extern crate actix_web;
+    /// use actix_web::{App, HttpRequest};
+    ///
+    /// struct AppState;
+    ///
+    /// fn index(req: HttpRequest<AppState>) -> &'static str {
+    ///     "Welcome!"
+    /// }
+    ///
+    /// fn main() {
+    ///     let app = App::with_state(AppState)
+    ///         .scope("/app", |scope| {
+    ///             scope.nested("/v1", |scope| {
+    ///                scope.resource("/test1", |r| r.f(index))
+    ///             })
+    ///         });
+    /// }
+    /// ```
+    pub fn nested<F>(mut self, path: &str, f: F) -> Scope<S>
+    where
+        F: FnOnce(Scope<S>) -> Scope<S>,
+    {
+        let scope = Scope {
+            nested: Vec::new(),
+            resources: Rc::new(Vec::new()),
+            middlewares: Rc::new(Vec::new()),
+            default: Rc::new(UnsafeCell::new(ResourceHandler::default_not_found())),
+        };
+        let scope = f(scope);
+
+        let mut path = path.trim().trim_right_matches('/').to_owned();
+        if !path.is_empty() && !path.starts_with('/') {
+            path.insert(0, '/')
+        }
+
+        self.nested
+            .push((path, UnsafeCell::new(Box::new(scope))));
 
         self
     }
@@ -249,11 +297,34 @@ impl<S: 'static> RouteHandler<S> for Scope<S> {
             }
         }
 
-        // nested scope
+        // nested scopes
-        if let Some(ref handler) = self.handler {
+        for &(ref prefix, ref handler) in &self.nested {
-            let hnd: &mut RouteHandler<_> = unsafe { (&mut *(handler.get())).as_mut() };
+            let len = req.prefix_len() as usize;
-            hnd.handle(req)
+            let m = {
+                let path = &req.path()[len..];
+                path.starts_with(prefix)
+                    && (path.len() == prefix.len()
+                        || path.split_at(prefix.len()).1.starts_with('/'))
+            };
+
+            if m {
+                let prefix_len = len + prefix.len();
+                let path: &'static str =
+                    unsafe { &*(&req.path()[prefix_len..] as *const _) };
+
+                req.set_prefix_len(prefix_len as u16);
+                if path.is_empty() {
+                    req.match_info_mut().set("tail", "/");
                 } else {
+                    req.match_info_mut().set("tail", path);
+                }
+
+                let hnd: &mut RouteHandler<_> =
+                    unsafe { (&mut *(handler.get())).as_mut() };
+                return hnd.handle(req);
+            }
+        }
+
         // default handler
         let default = unsafe { &mut *self.default.as_ref().get() };
         if self.middlewares.is_empty() {
@@ -267,7 +338,6 @@ impl<S: 'static> RouteHandler<S> for Scope<S> {
             ))
         }
     }
-    }
 }
 
 struct Wrapper<S: 'static> {
@@ -646,13 +716,31 @@ mod tests {
 
         let mut app = App::new()
             .scope("/app", |scope| {
-                scope.with_state(State, |scope| {
+                scope.with_state("/t1", State, |scope| {
                     scope.resource("/path1", |r| r.f(|_| HttpResponse::Created()))
                 })
             })
             .finish();
 
-        let req = TestRequest::with_uri("/app/path1").finish();
+        let req = TestRequest::with_uri("/app/t1/path1").finish();
+        let resp = app.run(req);
+        assert_eq!(
+            resp.as_response().unwrap().status(),
+            StatusCode::CREATED
+        );
+    }
+
+    #[test]
+    fn test_nested_scope() {
+        let mut app = App::new()
+            .scope("/app", |scope| {
+                scope.nested("/t1", |scope| {
+                    scope.resource("/path1", |r| r.f(|_| HttpResponse::Created()))
+                })
+            })
+            .finish();
+
+        let req = TestRequest::with_uri("/app/t1/path1").finish();
         let resp = app.run(req);
         assert_eq!(
             resp.as_response().unwrap().status(),

src/server/h1decoder.rs

@@ -9,6 +9,7 @@ use super::settings::WorkerSettings;
 use error::ParseError;
 use http::header::{HeaderName, HeaderValue};
 use http::{header, HttpTryFrom, Method, Uri, Version};
+use httprequest::MessageFlags;
 use uri::Url;
 
 const MAX_BUFFER_SIZE: usize = 131_072;
@@ -128,7 +129,9 @@ impl H1Decoder {
             let msg = settings.get_http_message();
             {
                 let msg_mut = msg.get_mut();
-                msg_mut.keep_alive = version != Version::HTTP_10;
+                msg_mut
+                    .flags
+                    .set(MessageFlags::KEEPALIVE, version != Version::HTTP_10);
 
                 for header in headers[..headers_len].iter() {
                     if let Ok(name) = HeaderName::from_bytes(header.name.as_bytes()) {
@@ -165,7 +168,7 @@ impl H1Decoder {
                             }
                             // connection keep-alive state
                             header::CONNECTION => {
-                                msg_mut.keep_alive = if let Ok(conn) = value.to_str() {
+                                let ka = if let Ok(conn) = value.to_str() {
                                     if version == Version::HTTP_10
                                         && conn.contains("keep-alive")
                                     {
@@ -178,6 +181,7 @@ impl H1Decoder {
                                 } else {
                                     false
                                 };
+                                msg_mut.flags.set(MessageFlags::KEEPALIVE, ka);
                             }
                             _ => (),
                         }

tests/test_client.rs

@@ -1,3 +1,4 @@
+#![allow(deprecated)]
 extern crate actix;
 extern crate actix_web;
 extern crate bytes;