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use std::ops::Deref;
use std::rc::Rc;
use futures::Future;
use http::Method;
use smallvec::SmallVec;
use error::Error;
use handler::{AsyncResult, FromRequest, Handler, Responder};
use httprequest::HttpRequest;
use httpresponse::HttpResponse;
use middleware::Middleware;
use pred;
use route::Route;
use router::ResourceDef;
use with::WithFactory;
#[derive(Copy, Clone)]
pub(crate) struct RouteId(usize);
/// *Resource* is an entry in route table which corresponds to requested URL.
///
/// Resource in turn has at least one route.
/// Route consists of an object that implements `Handler` trait (handler)
/// and list of predicates (objects that implement `Predicate` trait).
/// Route uses builder-like pattern for configuration.
/// During request handling, resource object iterate through all routes
/// and check all predicates for specific route, if request matches all
/// predicates route route considered matched and route handler get called.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::{App, HttpResponse, http};
///
/// fn main() {
/// let app = App::new()
/// .resource(
/// "/", |r| r.method(http::Method::GET).f(|r| HttpResponse::Ok()))
/// .finish();
/// }
pub struct Resource<S = ()> {
rdef: ResourceDef,
routes: SmallVec<[Route<S>; 3]>,
middlewares: Rc<Vec<Box<Middleware<S>>>>,
}
impl<S> Resource<S> {
/// Create new resource with specified resource definition
pub fn new(rdef: ResourceDef) -> Self {
Resource {
rdef,
routes: SmallVec::new(),
middlewares: Rc::new(Vec::new()),
}
}
/// Name of the resource
pub(crate) fn get_name(&self) -> &str {
self.rdef.name()
}
/// Set resource name
pub fn name(&mut self, name: &str) {
self.rdef.set_name(name);
}
/// Resource definition
pub fn rdef(&self) -> &ResourceDef {
&self.rdef
}
}
impl<S: 'static> Resource<S> {
/// Register a new route and return mutable reference to *Route* object.
/// *Route* is used for route configuration, i.e. adding predicates,
/// setting up handler.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::*;
///
/// fn main() {
/// let app = App::new()
/// .resource("/", |r| {
/// r.route()
/// .filter(pred::Any(pred::Get()).or(pred::Put()))
/// .filter(pred::Header("Content-Type", "text/plain"))
/// .f(|r| HttpResponse::Ok())
/// })
/// .finish();
/// }
/// ```
pub fn route(&mut self) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap()
}
/// Register a new `GET` route.
pub fn get(&mut self) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().filter(pred::Get())
}
/// Register a new `POST` route.
pub fn post(&mut self) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().filter(pred::Post())
}
/// Register a new `PUT` route.
pub fn put(&mut self) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().filter(pred::Put())
}
/// Register a new `DELETE` route.
pub fn delete(&mut self) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().filter(pred::Delete())
}
/// Register a new `HEAD` route.
pub fn head(&mut self) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().filter(pred::Head())
}
/// Register a new route and add method check to route.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::*;
/// fn index(req: &HttpRequest) -> HttpResponse { unimplemented!() }
///
/// App::new().resource("/", |r| r.method(http::Method::GET).f(index));
/// ```
///
/// This is shortcut for:
///
/// ```rust
/// # extern crate actix_web;
/// # use actix_web::*;
/// # fn index(req: &HttpRequest) -> HttpResponse { unimplemented!() }
/// App::new().resource("/", |r| r.route().filter(pred::Get()).f(index));
/// ```
pub fn method(&mut self, method: Method) -> &mut Route<S> {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().filter(pred::Method(method))
}
/// Register a new route and add handler object.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::*;
/// fn handler(req: &HttpRequest) -> HttpResponse { unimplemented!() }
///
/// App::new().resource("/", |r| r.h(handler));
/// ```
///
/// This is shortcut for:
///
/// ```rust
/// # extern crate actix_web;
/// # use actix_web::*;
/// # fn handler(req: &HttpRequest) -> HttpResponse { unimplemented!() }
/// App::new().resource("/", |r| r.route().h(handler));
/// ```
pub fn h<H: Handler<S>>(&mut self, handler: H) {
self.routes.push(Route::default());
self.routes.last_mut().unwrap().h(handler)
}
/// Register a new route and add handler function.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::*;
/// fn index(req: &HttpRequest) -> HttpResponse { unimplemented!() }
///
/// App::new().resource("/", |r| r.f(index));
/// ```
///
/// This is shortcut for:
///
/// ```rust
/// # extern crate actix_web;
/// # use actix_web::*;
/// # fn index(req: &HttpRequest) -> HttpResponse { unimplemented!() }
/// App::new().resource("/", |r| r.route().f(index));
/// ```
pub fn f<F, R>(&mut self, handler: F)
where
F: Fn(&HttpRequest<S>) -> R + 'static,
R: Responder + 'static,
{
self.routes.push(Route::default());
self.routes.last_mut().unwrap().f(handler)
}
/// Register a new route and add handler.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::*;
/// fn index(req: HttpRequest) -> HttpResponse { unimplemented!() }
///
/// App::new().resource("/", |r| r.with(index));
/// ```
///
/// This is shortcut for:
///
/// ```rust
/// # extern crate actix_web;
/// # use actix_web::*;
/// # fn index(req: HttpRequest) -> HttpResponse { unimplemented!() }
/// App::new().resource("/", |r| r.route().with(index));
/// ```
pub fn with<T, F, R>(&mut self, handler: F)
where
F: WithFactory<T, S, R>,
R: Responder + 'static,
T: FromRequest<S> + 'static,
{
self.routes.push(Route::default());
self.routes.last_mut().unwrap().with(handler);
}
/// Register a new route and add async handler.
///
/// ```rust
/// # extern crate actix_web;
/// # extern crate futures;
/// use actix_web::*;
/// use futures::future::Future;
///
/// fn index(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
/// unimplemented!()
/// }
///
/// App::new().resource("/", |r| r.with_async(index));
/// ```
///
/// This is shortcut for:
///
/// ```rust
/// # extern crate actix_web;
/// # extern crate futures;
/// # use actix_web::*;
/// # use futures::future::Future;
/// # fn index(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
/// # unimplemented!()
/// # }
/// App::new().resource("/", |r| r.route().with_async(index));
/// ```
pub fn with_async<T, F, R, I, E>(&mut self, handler: F)
where
F: Fn(T) -> R + 'static,
R: Future<Item = I, Error = E> + 'static,
I: Responder + 'static,
E: Into<Error> + 'static,
T: FromRequest<S> + 'static,
{
self.routes.push(Route::default());
self.routes.last_mut().unwrap().with_async(handler);
}
/// Register a resource middleware
///
/// This is similar to `App's` middlewares, but
/// middlewares get invoked on resource level.
///
/// *Note* `Middleware::finish()` fires right after response get
/// prepared. It does not wait until body get sent to peer.
pub fn middleware<M: Middleware<S>>(&mut self, mw: M) {
Rc::get_mut(&mut self.middlewares)
.unwrap()
.push(Box::new(mw));
}
#[inline]
pub(crate) fn get_route_id(&self, req: &HttpRequest<S>) -> Option<RouteId> {
for idx in 0..self.routes.len() {
if (&self.routes[idx]).check(req) {
return Some(RouteId(idx));
}
}
None
}
#[inline]
pub(crate) fn handle(
&self, id: RouteId, req: &HttpRequest<S>,
) -> AsyncResult<HttpResponse> {
if self.middlewares.is_empty() {
(&self.routes[id.0]).handle(req)
} else {
(&self.routes[id.0]).compose(req.clone(), Rc::clone(&self.middlewares))
}
}
}
/// Default resource
pub struct DefaultResource<S>(Rc<Resource<S>>);
impl<S> Deref for DefaultResource<S> {
type Target = Resource<S>;
fn deref(&self) -> &Resource<S> {
self.0.as_ref()
}
}
impl<S> Clone for DefaultResource<S> {
fn clone(&self) -> Self {
DefaultResource(self.0.clone())
}
}
impl<S> From<Resource<S>> for DefaultResource<S> {
fn from(res: Resource<S>) -> Self {
DefaultResource(Rc::new(res))
}
}