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extend CorsBuilder api to make it more user friendly

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This commit is contained in:
Nikolay Kim 2018-04-09 21:11:15 -07:00
parent d04ff13955
commit 1686682c19
2 changed files with 177 additions and 21 deletions
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13
src/application.rs
View file

@ -139,7 +139,7 @@ pub struct App<S=()> {
impl App<()> {
/// Create application with empty state. Application can
/// Create application with empty state. Application can
/// be configured with a builder-like pattern.
pub fn new() -> App<()> {
App {
@ -328,8 +328,15 @@ impl<S> App<S> where S: 'static {
self
}
/// Default resource to be used if no matching route could be
/// found.
/// Configure resource for a specific path.
#[doc(hidden)]
pub fn register_resource(&mut self, path: &str, resource: ResourceHandler<S>) {
let pattern = Resource::new(resource.get_name(), path);
self.parts.as_mut().expect("Use after finish")
.resources.push((pattern, Some(resource)));
}
/// Default resource to be used if no matching route could be found.
pub fn default_resource<F, R>(mut self, f: F) -> App<S>
where F: FnOnce(&mut ResourceHandler<S>) -> R + 'static
{

185
src/middleware/cors.rs
View file

@ -52,6 +52,7 @@ use std::rc::Rc;
use http::{self, Method, HttpTryFrom, Uri, StatusCode};
use http::header::{self, HeaderName, HeaderValue};
use application::App;
use error::{Result, ResponseError};
use resource::ResourceHandler;
use httpmessage::HttpMessage;
@ -183,7 +184,7 @@ impl Default for Cors {
}
impl Cors {
pub fn build() -> CorsBuilder {
pub fn build() -> CorsBuilder<()> {
CorsBuilder {
cors: Some(Inner {
origins: AllOrSome::All,
@ -200,6 +201,48 @@ impl Cors {
methods: false,
error: None,
expose_hdrs: HashSet::new(),
resources: Vec::new(),
app: None,
}
}
/// Create CorsBuilder for a specified application.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::{http, App, HttpResponse};
/// use actix_web::middleware::cors::Cors;
///
/// fn main() {
/// let app = App::new()
/// .configure(|app| Cors::for_app(app) // <- Construct CORS builder
/// .allowed_origin("https://www.rust-lang.org/")
/// .resource("/resource", |r| { // register resource
/// r.method(http::Method::GET).f(|_| HttpResponse::Ok());
/// })
/// .register() // construct CORS and return application instance
/// );
/// }
/// ```
pub fn for_app<S: 'static>(app: App<S>) -> CorsBuilder<S> {
CorsBuilder {
cors: Some(Inner {
origins: AllOrSome::All,
origins_str: None,
methods: HashSet::new(),
headers: AllOrSome::All,
expose_hdrs: None,
max_age: None,
preflight: true,
send_wildcard: false,
supports_credentials: false,
vary_header: true,
}),
methods: false,
error: None,
expose_hdrs: HashSet::new(),
resources: Vec::new(),
app: Some(app),
}
}
@ -401,11 +444,13 @@ impl<S> Middleware<S> for Cors {
/// .finish();
/// # }
/// ```
pub struct CorsBuilder {
pub struct CorsBuilder<S=()> {
cors: Option<Inner>,
methods: bool,
error: Option<http::Error>,
expose_hdrs: HashSet<HeaderName>,
resources: Vec<(String, ResourceHandler<S>)>,
app: Option<App<S>>,
}
fn cors<'a>(parts: &'a mut Option<Inner>, err: &Option<http::Error>)
@ -417,7 +462,7 @@ fn cors<'a>(parts: &'a mut Option<Inner>, err: &Option<http::Error>)
parts.as_mut()
}
impl CorsBuilder {
impl<S: 'static> CorsBuilder<S> {
/// Add an origin that are allowed to make requests.
/// Will be verified against the `Origin` request header.
@ -435,7 +480,7 @@ impl CorsBuilder {
/// Defaults to `All`.
///
/// Builder panics if supplied origin is not valid uri.
pub fn allowed_origin(&mut self, origin: &str) -> &mut CorsBuilder {
pub fn allowed_origin(&mut self, origin: &str) -> &mut CorsBuilder<S> {
if let Some(cors) = cors(&mut self.cors, &self.error) {
match Uri::try_from(origin) {
Ok(_) => {
@ -461,7 +506,7 @@ impl CorsBuilder {
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
///
/// Defaults to `[GET, HEAD, POST, OPTIONS, PUT, PATCH, DELETE]`
pub fn allowed_methods<U, M>(&mut self, methods: U) -> &mut CorsBuilder
pub fn allowed_methods<U, M>(&mut self, methods: U) -> &mut CorsBuilder<S>
where U: IntoIterator<Item=M>, Method: HttpTryFrom<M>
{
self.methods = true;
@ -482,7 +527,7 @@ impl CorsBuilder {
}
/// Set an allowed header
pub fn allowed_header<H>(&mut self, header: H) -> &mut CorsBuilder
pub fn allowed_header<H>(&mut self, header: H) -> &mut CorsBuilder<S>
where HeaderName: HttpTryFrom<H>
{
if let Some(cors) = cors(&mut self.cors, &self.error) {
@ -511,7 +556,7 @@ impl CorsBuilder {
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
///
/// Defaults to `All`.
pub fn allowed_headers<U, H>(&mut self, headers: U) -> &mut CorsBuilder
pub fn allowed_headers<U, H>(&mut self, headers: U) -> &mut CorsBuilder<S>
where U: IntoIterator<Item=H>, HeaderName: HttpTryFrom<H>
{
if let Some(cors) = cors(&mut self.cors, &self.error) {
@ -542,7 +587,7 @@ impl CorsBuilder {
/// [Resource Processing Model](https://www.w3.org/TR/cors/#resource-processing-model).
///
/// This defaults to an empty set.
pub fn expose_headers<U, H>(&mut self, headers: U) -> &mut CorsBuilder
pub fn expose_headers<U, H>(&mut self, headers: U) -> &mut CorsBuilder<S>
where U: IntoIterator<Item=H>, HeaderName: HttpTryFrom<H>
{
for h in headers {
@ -563,7 +608,7 @@ impl CorsBuilder {
/// This value is set as the `Access-Control-Max-Age` header.
///
/// This defaults to `None` (unset).
pub fn max_age(&mut self, max_age: usize) -> &mut CorsBuilder {
pub fn max_age(&mut self, max_age: usize) -> &mut CorsBuilder<S> {
if let Some(cors) = cors(&mut self.cors, &self.error) {
cors.max_age = Some(max_age)
}
@ -584,7 +629,7 @@ impl CorsBuilder {
/// in an `Error::CredentialsWithWildcardOrigin` error during actix launch or runtime.
///
/// Defaults to `false`.
pub fn send_wildcard(&mut self) -> &mut CorsBuilder {
pub fn send_wildcard(&mut self) -> &mut CorsBuilder<S> {
if let Some(cors) = cors(&mut self.cors, &self.error) {
cors.send_wildcard = true
}
@ -603,7 +648,7 @@ impl CorsBuilder {
///
/// Builder panics if credentials are allowed, but the Origin is set to "*".
/// This is not allowed by W3C
pub fn supports_credentials(&mut self) -> &mut CorsBuilder {
pub fn supports_credentials(&mut self) -> &mut CorsBuilder<S> {
if let Some(cors) = cors(&mut self.cors, &self.error) {
cors.supports_credentials = true
}
@ -621,7 +666,7 @@ impl CorsBuilder {
/// caches that the CORS headers are dynamic, and cannot be cached.
///
/// By default `vary` header support is enabled.
pub fn disable_vary_header(&mut self) -> &mut CorsBuilder {
pub fn disable_vary_header(&mut self) -> &mut CorsBuilder<S> {
if let Some(cors) = cors(&mut self.cors, &self.error) {
cors.vary_header = false
}
@ -634,21 +679,57 @@ impl CorsBuilder {
/// This is useful application level middleware.
///
/// By default *preflight* support is enabled.
pub fn disable_preflight(&mut self) -> &mut CorsBuilder {
pub fn disable_preflight(&mut self) -> &mut CorsBuilder<S> {
if let Some(cors) = cors(&mut self.cors, &self.error) {
cors.preflight = false
}
self
}
/// Finishes building and returns the built `Cors` instance.
/// Configure resource for a specific path.
///
/// This method panics in case of any configuration error.
pub fn finish(&mut self) -> Cors {
/// This is similar to a `App::resource()` method. Except, cors middleware
/// get registered for the resource.
///
/// ```rust
/// # extern crate actix_web;
/// use actix_web::{http, App, HttpResponse};
/// use actix_web::middleware::cors::Cors;
///
/// fn main() {
/// let app = App::new()
/// .configure(|app| Cors::for_app(app) // <- Construct CORS builder
/// .allowed_origin("https://www.rust-lang.org/")
/// .allowed_methods(vec!["GET", "POST"])
/// .allowed_header(http::header::CONTENT_TYPE)
/// .max_age(3600)
/// .resource("/resource1", |r| { // register resource
/// r.method(http::Method::GET).f(|_| HttpResponse::Ok());
/// })
/// .resource("/resource2", |r| { // register another resource
/// r.method(http::Method::HEAD)
/// .f(|_| HttpResponse::MethodNotAllowed());
/// })
/// .register() // construct CORS and return application instance
/// );
/// }
/// ```
pub fn resource<F, R>(&mut self, path: &str, f: F) -> &mut CorsBuilder<S>
where F: FnOnce(&mut ResourceHandler<S>) -> R + 'static
{
// add resource handler
let mut handler = ResourceHandler::default();
f(&mut handler);
self.resources.push((path.to_owned(), handler));
self
}
fn construct(&mut self) -> Cors {
if !self.methods {
self.allowed_methods(vec![Method::GET, Method::HEAD,
Method::POST, Method::OPTIONS, Method::PUT,
Method::PATCH, Method::DELETE]);
Method::POST, Method::OPTIONS, Method::PUT,
Method::PATCH, Method::DELETE]);
}
if let Some(e) = self.error.take() {
@ -673,6 +754,39 @@ impl CorsBuilder {
}
Cors{inner: Rc::new(cors)}
}
/// Finishes building and returns the built `Cors` instance.
///
/// This method panics in case of any configuration error.
pub fn finish(&mut self) -> Cors {
if !self.resources.is_empty() {
panic!("CorsBuilder::resource() was used,
to construct CORS `.register(app)` method should be used");
}
self.construct()
}
/// Finishes building Cors middleware and register middleware for application
///
/// This method panics in case of any configuration error or if non of
/// resources are registered.
pub fn register(&mut self) -> App<S> {
if self.resources.is_empty() {
panic!("No resources are registered.");
}
let cors = self.construct();
let mut app = self.app.take().expect(
"CorsBuilder has to be constructed with Cors::for_app(app)");
// register resources
for (path, mut resource) in self.resources.drain(..) {
cors.clone().register(&mut resource);
app.register_resource(&path, resource);
}
app
}
}
@ -713,6 +827,23 @@ mod tests {
.finish();
}
#[test]
#[should_panic(expected = "No resources are registered")]
fn no_resource() {
Cors::build()
.supports_credentials()
.send_wildcard()
.register();
}
#[test]
#[should_panic(expected = "Cors::for_app(app)")]
fn no_resource2() {
Cors::build()
.resource("/test", |r| r.f(|_| HttpResponse::Ok()))
.register();
}
#[test]
fn validate_origin_allows_all_origins() {
let cors = Cors::default();
@ -866,4 +997,22 @@ mod tests {
&b"https://www.example.com"[..],
resp.headers().get(header::ACCESS_CONTROL_ALLOW_ORIGIN).unwrap().as_bytes());
}
#[test]
fn cors_resource() {
let mut app = App::new()
.configure(
|app| Cors::for_app(app)
.allowed_origin("https://www.example.com")
.resource("/test", |r| r.f(|_| HttpResponse::Ok()))
.register())
.finish();
let req = TestRequest::with_uri("/test").finish();
let resp = app.run(req);
// TODO: proper test
//assert_eq!(resp.as_response().unwrap().status(), StatusCode::OK);
assert!(resp.as_response().is_none());
}
}