mirror of
https://github.com/fafhrd91/actix-web
synced 2024-11-28 01:52:57 +01:00
602 lines
20 KiB
Rust
602 lines
20 KiB
Rust
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use std::cell::UnsafeCell;
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use std::marker::PhantomData;
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use std::rc::Rc;
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use futures::{Async, Future, Poll};
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use error::Error;
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use handler::{FromRequest, Reply, ReplyItem, Responder, RouteHandler};
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use http::Method;
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use httprequest::HttpRequest;
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use httpresponse::HttpResponse;
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use middleware::{Finished as MiddlewareFinished, Middleware,
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Response as MiddlewareResponse, Started as MiddlewareStarted};
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use resource::ResourceHandler;
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use router::Resource;
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type ScopeResources<S> = Rc<Vec<(Resource, Rc<UnsafeCell<ResourceHandler<S>>>)>>;
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/// Resources scope
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///
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/// Scope is a set of resources with common root path.
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/// Scopes collect multiple paths under a common path prefix.
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/// Scope path can not contain variable path segments as resources.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// use actix_web::{http, App, HttpRequest, HttpResponse};
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///
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/// fn main() {
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/// let app = App::new()
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/// .scope("/app", |scope| {
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/// scope.resource("/path1", |r| r.f(|_| HttpResponse::Ok()))
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/// .resource("/path2", |r| r.f(|_| HttpResponse::Ok()))
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/// .resource("/path3", |r| r.f(|_| HttpResponse::MethodNotAllowed()))
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/// });
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/// }
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/// ```
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///
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/// In the above example three routes get registered:
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/// * /app/path1 - reponds to all http method
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/// * /app/path2 - `GET` requests
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/// * /app/path3 - `HEAD` requests
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///
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pub struct Scope<S: 'static> {
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middlewares: Rc<Vec<Box<Middleware<S>>>>,
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default: Rc<UnsafeCell<ResourceHandler<S>>>,
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resources: ScopeResources<S>,
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}
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impl<S: 'static> Default for Scope<S> {
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fn default() -> Scope<S> {
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Scope::new()
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}
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}
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impl<S: 'static> Scope<S> {
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pub fn new() -> Scope<S> {
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Scope {
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resources: Rc::new(Vec::new()),
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middlewares: Rc::new(Vec::new()),
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default: Rc::new(UnsafeCell::new(ResourceHandler::default_not_found())),
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}
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}
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/// Configure route for a specific path.
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///
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/// This is a simplified version of the `Scope::resource()` method.
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/// Handler functions need to accept one request extractor
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/// argument.
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///
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/// This method could be called multiple times, in that case
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/// multiple routes would be registered for same resource path.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// use actix_web::{http, App, HttpRequest, HttpResponse, Path};
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///
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/// fn index(data: Path<(String, String)>) -> &'static str {
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/// "Welcome!"
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/// }
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///
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/// fn main() {
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/// let app = App::new()
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/// .scope("/app", |scope| {
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/// scope.route("/test1", http::Method::GET, index)
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/// .route("/test2", http::Method::POST,
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/// |_: HttpRequest| HttpResponse::MethodNotAllowed())
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/// });
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/// }
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/// ```
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pub fn route<T, F, R>(mut self, path: &str, method: Method, f: F) -> Scope<S>
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where
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F: Fn(T) -> R + 'static,
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R: Responder + 'static,
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T: FromRequest<S> + 'static,
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{
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// get resource handler
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let slf: &Scope<S> = unsafe { &*(&self as *const _) };
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for &(ref pattern, ref resource) in slf.resources.iter() {
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if pattern.pattern() == path {
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let resource = unsafe { &mut *resource.get() };
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resource.method(method).with(f);
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return self;
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}
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}
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let mut handler = ResourceHandler::default();
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handler.method(method).with(f);
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let pattern = Resource::new(handler.get_name(), path);
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Rc::get_mut(&mut self.resources)
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.expect("Can not use after configuration")
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.push((pattern, Rc::new(UnsafeCell::new(handler))));
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self
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}
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/// Configure resource for a specific path.
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///
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/// This method is similar to an `App::resource()` method.
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/// Resources may have variable path segments. Resource path uses scope
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/// path as a path prefix.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// use actix_web::*;
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///
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/// fn main() {
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/// let app = App::new()
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/// .scope("/api", |scope| {
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/// scope.resource("/users/{userid}/{friend}", |r| {
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/// r.get().f(|_| HttpResponse::Ok());
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/// r.head().f(|_| HttpResponse::MethodNotAllowed());
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/// r.route()
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/// .filter(pred::Any(pred::Get()).or(pred::Put()))
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/// .filter(pred::Header("Content-Type", "text/plain"))
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/// .f(|_| HttpResponse::Ok())
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/// })
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/// });
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/// }
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/// ```
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pub fn resource<F, R>(mut self, path: &str, f: F) -> Scope<S>
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where
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F: FnOnce(&mut ResourceHandler<S>) -> R + 'static,
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{
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// add resource handler
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let mut handler = ResourceHandler::default();
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f(&mut handler);
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let pattern = Resource::new(handler.get_name(), path);
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Rc::get_mut(&mut self.resources)
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.expect("Can not use after configuration")
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.push((pattern, Rc::new(UnsafeCell::new(handler))));
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self
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}
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/// Default resource to be used if no matching route could be found.
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pub fn default_resource<F, R>(self, f: F) -> Scope<S>
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where
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F: FnOnce(&mut ResourceHandler<S>) -> R + 'static,
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{
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let default = unsafe { &mut *self.default.as_ref().get() };
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f(default);
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self
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}
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/// Register a scope middleware
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///
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/// This is similar to `App's` middlewares, but
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/// middlewares get invoked on scope level.
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///
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/// *Note* `Middleware::finish()` is fired right after response get
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/// prepared. It does not wait until body get sent to peer.
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pub fn middleware<M: Middleware<S>>(mut self, mw: M) -> Scope<S> {
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Rc::get_mut(&mut self.middlewares)
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.expect("Can not use after configuration")
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.push(Box::new(mw));
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self
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}
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}
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impl<S: 'static> RouteHandler<S> for Scope<S> {
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fn handle(&mut self, mut req: HttpRequest<S>) -> Reply {
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let path = unsafe { &*(&req.match_info()["tail"] as *const _) };
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let path = if path == "" { "/" } else { path };
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for (pattern, resource) in self.resources.iter() {
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if pattern.match_with_params(path, req.match_info_mut()) {
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let default = unsafe { &mut *self.default.as_ref().get() };
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if self.middlewares.is_empty() {
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let resource = unsafe { &mut *resource.get() };
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return resource.handle(req, Some(default));
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} else {
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return Reply::async(Compose::new(
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req,
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Rc::clone(&self.middlewares),
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Rc::clone(&resource),
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Some(Rc::clone(&self.default)),
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));
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}
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}
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}
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let default = unsafe { &mut *self.default.as_ref().get() };
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if self.middlewares.is_empty() {
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default.handle(req, None)
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} else {
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Reply::async(Compose::new(
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req,
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Rc::clone(&self.middlewares),
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Rc::clone(&self.default),
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None,
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))
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}
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}
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}
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/// Compose resource level middlewares with route handler.
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struct Compose<S: 'static> {
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info: ComposeInfo<S>,
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state: ComposeState<S>,
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}
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struct ComposeInfo<S: 'static> {
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count: usize,
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req: HttpRequest<S>,
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mws: Rc<Vec<Box<Middleware<S>>>>,
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default: Option<Rc<UnsafeCell<ResourceHandler<S>>>>,
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resource: Rc<UnsafeCell<ResourceHandler<S>>>,
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}
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enum ComposeState<S: 'static> {
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Starting(StartMiddlewares<S>),
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Handler(WaitingResponse<S>),
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RunMiddlewares(RunMiddlewares<S>),
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Finishing(FinishingMiddlewares<S>),
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Completed(Response<S>),
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}
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impl<S: 'static> ComposeState<S> {
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fn poll(&mut self, info: &mut ComposeInfo<S>) -> Option<ComposeState<S>> {
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match *self {
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ComposeState::Starting(ref mut state) => state.poll(info),
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ComposeState::Handler(ref mut state) => state.poll(info),
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ComposeState::RunMiddlewares(ref mut state) => state.poll(info),
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ComposeState::Finishing(ref mut state) => state.poll(info),
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ComposeState::Completed(_) => None,
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}
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}
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}
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impl<S: 'static> Compose<S> {
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fn new(
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req: HttpRequest<S>, mws: Rc<Vec<Box<Middleware<S>>>>,
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resource: Rc<UnsafeCell<ResourceHandler<S>>>,
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default: Option<Rc<UnsafeCell<ResourceHandler<S>>>>,
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) -> Self {
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let mut info = ComposeInfo {
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count: 0,
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req,
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mws,
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resource,
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default,
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};
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let state = StartMiddlewares::init(&mut info);
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Compose { state, info }
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}
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}
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impl<S> Future for Compose<S> {
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type Item = HttpResponse;
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type Error = Error;
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fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
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loop {
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if let ComposeState::Completed(ref mut resp) = self.state {
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let resp = resp.resp.take().unwrap();
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return Ok(Async::Ready(resp));
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}
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if let Some(state) = self.state.poll(&mut self.info) {
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self.state = state;
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} else {
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return Ok(Async::NotReady);
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}
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}
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}
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}
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/// Middlewares start executor
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struct StartMiddlewares<S> {
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fut: Option<Fut>,
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_s: PhantomData<S>,
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}
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type Fut = Box<Future<Item = Option<HttpResponse>, Error = Error>>;
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impl<S: 'static> StartMiddlewares<S> {
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fn init(info: &mut ComposeInfo<S>) -> ComposeState<S> {
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let len = info.mws.len();
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loop {
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if info.count == len {
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let resource = unsafe { &mut *info.resource.get() };
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let reply = if let Some(ref default) = info.default {
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let d = unsafe { &mut *default.as_ref().get() };
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resource.handle(info.req.clone(), Some(d))
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} else {
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resource.handle(info.req.clone(), None)
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};
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return WaitingResponse::init(info, reply);
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} else {
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match info.mws[info.count].start(&mut info.req) {
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Ok(MiddlewareStarted::Done) => info.count += 1,
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Ok(MiddlewareStarted::Response(resp)) => {
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return RunMiddlewares::init(info, resp)
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}
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Ok(MiddlewareStarted::Future(mut fut)) => match fut.poll() {
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Ok(Async::NotReady) => {
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return ComposeState::Starting(StartMiddlewares {
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fut: Some(fut),
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_s: PhantomData,
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})
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}
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Ok(Async::Ready(resp)) => {
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if let Some(resp) = resp {
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return RunMiddlewares::init(info, resp);
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}
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info.count += 1;
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}
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Err(err) => return Response::init(err.into()),
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},
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Err(err) => return Response::init(err.into()),
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}
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}
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}
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}
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fn poll(&mut self, info: &mut ComposeInfo<S>) -> Option<ComposeState<S>> {
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let len = info.mws.len();
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'outer: loop {
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match self.fut.as_mut().unwrap().poll() {
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Ok(Async::NotReady) => return None,
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Ok(Async::Ready(resp)) => {
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info.count += 1;
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if let Some(resp) = resp {
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return Some(RunMiddlewares::init(info, resp));
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}
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if info.count == len {
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let resource = unsafe { &mut *info.resource.get() };
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let reply = if let Some(ref default) = info.default {
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let d = unsafe { &mut *default.as_ref().get() };
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resource.handle(info.req.clone(), Some(d))
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} else {
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resource.handle(info.req.clone(), None)
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};
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return Some(WaitingResponse::init(info, reply));
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} else {
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loop {
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match info.mws[info.count].start(&mut info.req) {
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Ok(MiddlewareStarted::Done) => info.count += 1,
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Ok(MiddlewareStarted::Response(resp)) => {
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return Some(RunMiddlewares::init(info, resp));
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}
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Ok(MiddlewareStarted::Future(fut)) => {
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self.fut = Some(fut);
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continue 'outer;
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}
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Err(err) => return Some(Response::init(err.into())),
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|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Err(err) => return Some(Response::init(err.into())),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// waiting for response
|
||
|
|
struct WaitingResponse<S> {
|
||
|
|
fut: Box<Future<Item = HttpResponse, Error = Error>>,
|
||
|
|
_s: PhantomData<S>,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<S: 'static> WaitingResponse<S> {
|
||
|
|
#[inline]
|
||
|
|
fn init(info: &mut ComposeInfo<S>, reply: Reply) -> ComposeState<S> {
|
||
|
|
match reply.into() {
|
||
|
|
ReplyItem::Message(resp) => RunMiddlewares::init(info, resp),
|
||
|
|
ReplyItem::Future(fut) => ComposeState::Handler(WaitingResponse {
|
||
|
|
fut,
|
||
|
|
_s: PhantomData,
|
||
|
|
}),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn poll(&mut self, info: &mut ComposeInfo<S>) -> Option<ComposeState<S>> {
|
||
|
|
match self.fut.poll() {
|
||
|
|
Ok(Async::NotReady) => None,
|
||
|
|
Ok(Async::Ready(response)) => Some(RunMiddlewares::init(info, response)),
|
||
|
|
Err(err) => Some(RunMiddlewares::init(info, err.into())),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Middlewares response executor
|
||
|
|
struct RunMiddlewares<S> {
|
||
|
|
curr: usize,
|
||
|
|
fut: Option<Box<Future<Item = HttpResponse, Error = Error>>>,
|
||
|
|
_s: PhantomData<S>,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<S: 'static> RunMiddlewares<S> {
|
||
|
|
fn init(info: &mut ComposeInfo<S>, mut resp: HttpResponse) -> ComposeState<S> {
|
||
|
|
let mut curr = 0;
|
||
|
|
let len = info.mws.len();
|
||
|
|
|
||
|
|
loop {
|
||
|
|
resp = match info.mws[curr].response(&mut info.req, resp) {
|
||
|
|
Err(err) => {
|
||
|
|
info.count = curr + 1;
|
||
|
|
return FinishingMiddlewares::init(info, err.into());
|
||
|
|
}
|
||
|
|
Ok(MiddlewareResponse::Done(r)) => {
|
||
|
|
curr += 1;
|
||
|
|
if curr == len {
|
||
|
|
return FinishingMiddlewares::init(info, r);
|
||
|
|
} else {
|
||
|
|
r
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Ok(MiddlewareResponse::Future(fut)) => {
|
||
|
|
return ComposeState::RunMiddlewares(RunMiddlewares {
|
||
|
|
curr,
|
||
|
|
fut: Some(fut),
|
||
|
|
_s: PhantomData,
|
||
|
|
})
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn poll(&mut self, info: &mut ComposeInfo<S>) -> Option<ComposeState<S>> {
|
||
|
|
let len = info.mws.len();
|
||
|
|
|
||
|
|
loop {
|
||
|
|
// poll latest fut
|
||
|
|
let mut resp = match self.fut.as_mut().unwrap().poll() {
|
||
|
|
Ok(Async::NotReady) => return None,
|
||
|
|
Ok(Async::Ready(resp)) => {
|
||
|
|
self.curr += 1;
|
||
|
|
resp
|
||
|
|
}
|
||
|
|
Err(err) => return Some(FinishingMiddlewares::init(info, err.into())),
|
||
|
|
};
|
||
|
|
|
||
|
|
loop {
|
||
|
|
if self.curr == len {
|
||
|
|
return Some(FinishingMiddlewares::init(info, resp));
|
||
|
|
} else {
|
||
|
|
match info.mws[self.curr].response(&mut info.req, resp) {
|
||
|
|
Err(err) => {
|
||
|
|
return Some(FinishingMiddlewares::init(info, err.into()))
|
||
|
|
}
|
||
|
|
Ok(MiddlewareResponse::Done(r)) => {
|
||
|
|
self.curr += 1;
|
||
|
|
resp = r
|
||
|
|
}
|
||
|
|
Ok(MiddlewareResponse::Future(fut)) => {
|
||
|
|
self.fut = Some(fut);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Middlewares start executor
|
||
|
|
struct FinishingMiddlewares<S> {
|
||
|
|
resp: Option<HttpResponse>,
|
||
|
|
fut: Option<Box<Future<Item = (), Error = Error>>>,
|
||
|
|
_s: PhantomData<S>,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<S: 'static> FinishingMiddlewares<S> {
|
||
|
|
fn init(info: &mut ComposeInfo<S>, resp: HttpResponse) -> ComposeState<S> {
|
||
|
|
if info.count == 0 {
|
||
|
|
Response::init(resp)
|
||
|
|
} else {
|
||
|
|
let mut state = FinishingMiddlewares {
|
||
|
|
resp: Some(resp),
|
||
|
|
fut: None,
|
||
|
|
_s: PhantomData,
|
||
|
|
};
|
||
|
|
if let Some(st) = state.poll(info) {
|
||
|
|
st
|
||
|
|
} else {
|
||
|
|
ComposeState::Finishing(state)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn poll(&mut self, info: &mut ComposeInfo<S>) -> Option<ComposeState<S>> {
|
||
|
|
loop {
|
||
|
|
// poll latest fut
|
||
|
|
let not_ready = if let Some(ref mut fut) = self.fut {
|
||
|
|
match fut.poll() {
|
||
|
|
Ok(Async::NotReady) => true,
|
||
|
|
Ok(Async::Ready(())) => false,
|
||
|
|
Err(err) => {
|
||
|
|
error!("Middleware finish error: {}", err);
|
||
|
|
false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
false
|
||
|
|
};
|
||
|
|
if not_ready {
|
||
|
|
return None;
|
||
|
|
}
|
||
|
|
self.fut = None;
|
||
|
|
info.count -= 1;
|
||
|
|
|
||
|
|
match info.mws[info.count as usize]
|
||
|
|
.finish(&mut info.req, self.resp.as_ref().unwrap())
|
||
|
|
{
|
||
|
|
MiddlewareFinished::Done => {
|
||
|
|
if info.count == 0 {
|
||
|
|
return Some(Response::init(self.resp.take().unwrap()));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
MiddlewareFinished::Future(fut) => {
|
||
|
|
self.fut = Some(fut);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
struct Response<S> {
|
||
|
|
resp: Option<HttpResponse>,
|
||
|
|
_s: PhantomData<S>,
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<S: 'static> Response<S> {
|
||
|
|
fn init(resp: HttpResponse) -> ComposeState<S> {
|
||
|
|
ComposeState::Completed(Response {
|
||
|
|
resp: Some(resp),
|
||
|
|
_s: PhantomData,
|
||
|
|
})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#[cfg(test)]
|
||
|
|
mod tests {
|
||
|
|
use application::App;
|
||
|
|
use http::StatusCode;
|
||
|
|
use httpresponse::HttpResponse;
|
||
|
|
use test::TestRequest;
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_scope() {
|
||
|
|
let mut app = App::new()
|
||
|
|
.scope("/app", |scope| {
|
||
|
|
scope.resource("/path1", |r| r.f(|_| HttpResponse::Ok()))
|
||
|
|
})
|
||
|
|
.finish();
|
||
|
|
|
||
|
|
let req = TestRequest::with_uri("/app/path1").finish();
|
||
|
|
let resp = app.run(req);
|
||
|
|
assert_eq!(resp.as_response().unwrap().status(), StatusCode::OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn test_default_resource() {
|
||
|
|
let mut app = App::new()
|
||
|
|
.scope("/app", |scope| {
|
||
|
|
scope
|
||
|
|
.resource("/path1", |r| r.f(|_| HttpResponse::Ok()))
|
||
|
|
.default_resource(|r| r.f(|_| HttpResponse::BadRequest()))
|
||
|
|
})
|
||
|
|
.finish();
|
||
|
|
|
||
|
|
let req = TestRequest::with_uri("/app/path2").finish();
|
||
|
|
let resp = app.run(req);
|
||
|
|
assert_eq!(
|
||
|
|
resp.as_response().unwrap().status(),
|
||
|
|
StatusCode::BAD_REQUEST
|
||
|
|
);
|
||
|
|
|
||
|
|
let req = TestRequest::with_uri("/path2").finish();
|
||
|
|
let resp = app.run(req);
|
||
|
|
assert_eq!(
|
||
|
|
resp.as_response().unwrap().status(),
|
||
|
|
StatusCode::NOT_FOUND
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|