mirror of
https://github.com/actix/actix-extras.git
synced 2024-11-25 08:22:43 +01:00
427 lines
12 KiB
Rust
427 lines
12 KiB
Rust
use std::cell::RefCell;
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use std::marker::PhantomData;
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use std::rc::Rc;
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use actix_http::{http::Method, Error, Extensions, Response};
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use actix_service::{NewService, Service};
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use futures::{Async, Future, IntoFuture, Poll};
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use crate::extract::FromRequest;
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use crate::guard::{self, Guard};
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use crate::handler::{AsyncFactory, AsyncHandler, Extract, Factory, Handler};
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use crate::responder::Responder;
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use crate::service::{ServiceFromRequest, ServiceRequest, ServiceResponse};
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use crate::HttpResponse;
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type BoxedRouteService<Req, Res> = Box<
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Service<
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Request = Req,
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Response = Res,
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Error = (),
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Future = Box<Future<Item = Res, Error = ()>>,
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>,
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>;
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type BoxedRouteNewService<Req, Res> = Box<
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NewService<
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Request = Req,
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Response = Res,
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Error = (),
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InitError = (),
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Service = BoxedRouteService<Req, Res>,
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Future = Box<Future<Item = BoxedRouteService<Req, Res>, Error = ()>>,
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>,
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>;
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/// Resource route definition
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///
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/// Route uses builder-like pattern for configuration.
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/// If handler is not explicitly set, default *404 Not Found* handler is used.
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pub struct Route<P> {
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service: BoxedRouteNewService<ServiceRequest<P>, ServiceResponse>,
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guards: Rc<Vec<Box<Guard>>>,
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config: Option<Extensions>,
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config_ref: Rc<RefCell<Option<Rc<Extensions>>>>,
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}
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impl<P: 'static> Route<P> {
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/// Create new route which matches any request.
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pub fn new() -> Route<P> {
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let config_ref = Rc::new(RefCell::new(None));
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Route {
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service: Box::new(RouteNewService::new(
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Extract::new(config_ref.clone()).and_then(
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Handler::new(HttpResponse::NotFound).map_err(|_| panic!()),
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),
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)),
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guards: Rc::new(Vec::new()),
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config: None,
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config_ref,
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}
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}
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pub(crate) fn finish(mut self) -> Self {
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*self.config_ref.borrow_mut() = self.config.take().map(|e| Rc::new(e));
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self
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}
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pub(crate) fn take_guards(&mut self) -> Vec<Box<Guard>> {
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std::mem::replace(Rc::get_mut(&mut self.guards).unwrap(), Vec::new())
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}
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}
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impl<P> NewService for Route<P> {
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type Request = ServiceRequest<P>;
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type Response = ServiceResponse;
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type Error = ();
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type InitError = ();
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type Service = RouteService<P>;
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type Future = CreateRouteService<P>;
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fn new_service(&self, _: &()) -> Self::Future {
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CreateRouteService {
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fut: self.service.new_service(&()),
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guards: self.guards.clone(),
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}
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}
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}
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type RouteFuture<P> = Box<
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Future<Item = BoxedRouteService<ServiceRequest<P>, ServiceResponse>, Error = ()>,
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>;
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pub struct CreateRouteService<P> {
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fut: RouteFuture<P>,
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guards: Rc<Vec<Box<Guard>>>,
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}
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impl<P> Future for CreateRouteService<P> {
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type Item = RouteService<P>;
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type Error = ();
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fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
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match self.fut.poll()? {
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Async::Ready(service) => Ok(Async::Ready(RouteService {
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service,
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guards: self.guards.clone(),
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})),
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Async::NotReady => Ok(Async::NotReady),
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}
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}
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}
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pub struct RouteService<P> {
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service: BoxedRouteService<ServiceRequest<P>, ServiceResponse>,
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guards: Rc<Vec<Box<Guard>>>,
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}
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impl<P> RouteService<P> {
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pub fn check(&self, req: &mut ServiceRequest<P>) -> bool {
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for f in self.guards.iter() {
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if !f.check(req.head()) {
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return false;
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}
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}
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true
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}
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}
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impl<P> Service for RouteService<P> {
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type Request = ServiceRequest<P>;
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type Response = ServiceResponse;
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type Error = ();
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type Future = Box<Future<Item = Self::Response, Error = Self::Error>>;
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fn poll_ready(&mut self) -> Poll<(), Self::Error> {
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self.service.poll_ready()
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}
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fn call(&mut self, req: ServiceRequest<P>) -> Self::Future {
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self.service.call(req)
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}
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}
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impl<P: 'static> Route<P> {
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/// Add method guard to the route.
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///
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/// ```rust
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/// # use actix_web::*;
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/// # fn main() {
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/// App::new().service(web::resource("/path").route(
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/// web::get()
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/// .method(http::Method::CONNECT)
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/// .guard(guard::Header("content-type", "text/plain"))
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/// .to(|req: HttpRequest| HttpResponse::Ok()))
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/// );
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/// # }
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/// ```
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pub fn method(mut self, method: Method) -> Self {
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Rc::get_mut(&mut self.guards)
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.unwrap()
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.push(Box::new(guard::Method(method)));
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self
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}
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/// Add guard to the route.
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///
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/// ```rust
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/// # use actix_web::*;
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/// # fn main() {
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/// App::new().service(web::resource("/path").route(
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/// web::route()
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/// .guard(guard::Get())
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/// .guard(guard::Header("content-type", "text/plain"))
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/// .to(|req: HttpRequest| HttpResponse::Ok()))
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/// );
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/// # }
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/// ```
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pub fn guard<F: Guard + 'static>(mut self, f: F) -> Self {
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Rc::get_mut(&mut self.guards).unwrap().push(Box::new(f));
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self
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}
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// pub fn map<T, U, F: IntoNewService<T>>(
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// self,
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// md: F,
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// ) -> RouteServiceBuilder<T, S, (), U>
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// where
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// T: NewService<
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// Request = HandlerRequest<S>,
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// Response = HandlerRequest<S, U>,
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// InitError = (),
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// >,
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// {
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// RouteServiceBuilder {
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// service: md.into_new_service(),
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// guards: self.guards,
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// _t: PhantomData,
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// }
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// }
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/// Set handler function, use request extractors for parameters.
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///
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/// ```rust
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/// #[macro_use] extern crate serde_derive;
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/// use actix_web::{web, http, App};
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///
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/// #[derive(Deserialize)]
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/// struct Info {
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/// username: String,
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/// }
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///
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/// /// extract path info using serde
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/// fn index(info: web::Path<Info>) -> String {
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/// format!("Welcome {}!", info.username)
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/// }
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///
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/// fn main() {
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/// let app = App::new().service(
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/// web::resource("/{username}/index.html") // <- define path parameters
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/// .route(web::get().to(index)) // <- register handler
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/// );
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/// }
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/// ```
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///
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/// It is possible to use multiple extractors for one handler function.
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///
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/// ```rust
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/// # use std::collections::HashMap;
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/// # use serde_derive::Deserialize;
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/// use actix_web::{web, App};
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///
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/// #[derive(Deserialize)]
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/// struct Info {
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/// username: String,
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/// }
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///
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/// /// extract path info using serde
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/// fn index(path: web::Path<Info>, query: web::Query<HashMap<String, String>>, body: web::Json<Info>) -> String {
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/// format!("Welcome {}!", path.username)
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/// }
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///
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/// fn main() {
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/// let app = App::new().service(
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/// web::resource("/{username}/index.html") // <- define path parameters
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/// .route(web::get().to(index))
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/// );
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/// }
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/// ```
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pub fn to<F, T, R>(mut self, handler: F) -> Route<P>
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where
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F: Factory<T, R> + 'static,
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T: FromRequest<P> + 'static,
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R: Responder + 'static,
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{
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self.service = Box::new(RouteNewService::new(
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Extract::new(self.config_ref.clone())
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.and_then(Handler::new(handler).map_err(|_| panic!())),
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));
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self
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}
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/// Set async handler function, use request extractors for parameters.
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/// This method has to be used if your handler function returns `impl Future<>`
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///
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/// ```rust
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/// # use futures::future::ok;
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/// #[macro_use] extern crate serde_derive;
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/// use actix_web::{web, App, Error};
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/// use futures::Future;
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///
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/// #[derive(Deserialize)]
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/// struct Info {
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/// username: String,
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/// }
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///
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/// /// extract path info using serde
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/// fn index(info: web::Path<Info>) -> impl Future<Item = &'static str, Error = Error> {
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/// ok("Hello World!")
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/// }
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///
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/// fn main() {
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/// let app = App::new().service(
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/// web::resource("/{username}/index.html") // <- define path parameters
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/// .route(web::get().to_async(index)) // <- register async handler
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/// );
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/// }
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/// ```
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#[allow(clippy::wrong_self_convention)]
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pub fn to_async<F, T, R>(mut self, handler: F) -> Self
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where
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F: AsyncFactory<T, R>,
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T: FromRequest<P> + 'static,
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R: IntoFuture + 'static,
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R::Item: Into<Response>,
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R::Error: Into<Error>,
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{
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self.service = Box::new(RouteNewService::new(
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Extract::new(self.config_ref.clone())
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.and_then(AsyncHandler::new(handler).map_err(|_| panic!())),
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));
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self
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}
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/// This method allows to add extractor configuration
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/// for specific route.
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///
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/// ```rust
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/// use actix_web::{web, App};
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///
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/// /// extract text data from request
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/// fn index(body: String) -> String {
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/// format!("Body {}!", body)
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/// }
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///
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/// fn main() {
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/// let app = App::new().service(
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/// web::resource("/index.html").route(
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/// web::get()
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/// // limit size of the payload
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/// .config(web::PayloadConfig::new(4096))
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/// // register handler
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/// .to(index)
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/// ));
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/// }
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/// ```
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pub fn config<C: 'static>(mut self, config: C) -> Self {
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if self.config.is_none() {
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self.config = Some(Extensions::new());
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}
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self.config.as_mut().unwrap().insert(config);
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self
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}
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}
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struct RouteNewService<P, T>
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where
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T: NewService<Request = ServiceRequest<P>, Error = (Error, ServiceFromRequest<P>)>,
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{
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service: T,
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_t: PhantomData<P>,
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}
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impl<P: 'static, T> RouteNewService<P, T>
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where
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T: NewService<
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Request = ServiceRequest<P>,
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Response = ServiceResponse,
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Error = (Error, ServiceFromRequest<P>),
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>,
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T::Future: 'static,
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T::Service: 'static,
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<T::Service as Service>::Future: 'static,
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{
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pub fn new(service: T) -> Self {
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RouteNewService {
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service,
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_t: PhantomData,
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}
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}
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}
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impl<P: 'static, T> NewService for RouteNewService<P, T>
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where
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T: NewService<
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Request = ServiceRequest<P>,
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Response = ServiceResponse,
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Error = (Error, ServiceFromRequest<P>),
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>,
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T::Future: 'static,
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T::Service: 'static,
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<T::Service as Service>::Future: 'static,
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{
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type Request = ServiceRequest<P>;
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type Response = ServiceResponse;
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type Error = ();
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type InitError = ();
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type Service = BoxedRouteService<ServiceRequest<P>, Self::Response>;
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type Future = Box<Future<Item = Self::Service, Error = Self::InitError>>;
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fn new_service(&self, _: &()) -> Self::Future {
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Box::new(
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self.service
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.new_service(&())
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.map_err(|_| ())
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.and_then(|service| {
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let service: BoxedRouteService<_, _> =
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Box::new(RouteServiceWrapper {
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service,
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_t: PhantomData,
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});
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Ok(service)
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}),
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)
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}
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}
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struct RouteServiceWrapper<P, T: Service> {
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service: T,
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_t: PhantomData<P>,
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}
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impl<P, T> Service for RouteServiceWrapper<P, T>
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where
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T::Future: 'static,
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T: Service<
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Request = ServiceRequest<P>,
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Response = ServiceResponse,
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Error = (Error, ServiceFromRequest<P>),
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>,
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{
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type Request = ServiceRequest<P>;
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type Response = ServiceResponse;
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type Error = ();
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type Future = Box<Future<Item = Self::Response, Error = Self::Error>>;
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fn poll_ready(&mut self) -> Poll<(), Self::Error> {
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self.service.poll_ready().map_err(|_| ())
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}
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fn call(&mut self, req: ServiceRequest<P>) -> Self::Future {
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Box::new(self.service.call(req).then(|res| match res {
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Ok(res) => Ok(res),
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Err((err, req)) => Ok(req.error_response(err)),
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}))
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}
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}
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