mirror of
https://github.com/actix/actix-extras.git
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293 lines
8.8 KiB
Rust
293 lines
8.8 KiB
Rust
//! Route match predicates
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#![allow(non_snake_case)]
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use std::marker::PhantomData;
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use http;
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use http::{header, HttpTryFrom};
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use httpmessage::HttpMessage;
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use httprequest::HttpRequest;
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/// Trait defines resource route predicate.
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/// Predicate can modify request object. It is also possible to
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/// to store extra attributes on request by using `Extensions` container,
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/// Extensions container available via `HttpRequest::extensions()` method.
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pub trait Predicate<S> {
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/// Check if request matches predicate
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fn check(&self, &mut HttpRequest<S>) -> bool;
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}
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/// Return predicate that matches if any of supplied predicate matches.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// use actix_web::{pred, App, HttpResponse};
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///
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/// fn main() {
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/// App::new()
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/// .resource("/index.html", |r| r.route()
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/// .filter(pred::Any(pred::Get()).or(pred::Post()))
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/// .f(|r| HttpResponse::MethodNotAllowed()));
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/// }
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/// ```
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pub fn Any<S: 'static, P: Predicate<S> + 'static>(pred: P) -> AnyPredicate<S>
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{
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AnyPredicate(vec![Box::new(pred)])
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}
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/// Matches if any of supplied predicate matches.
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pub struct AnyPredicate<S>(Vec<Box<Predicate<S>>>);
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impl<S> AnyPredicate<S> {
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/// Add new predicate to list of predicates to check
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pub fn or<P: Predicate<S> + 'static>(mut self, pred: P) -> Self {
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self.0.push(Box::new(pred));
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self
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}
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}
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impl<S: 'static> Predicate<S> for AnyPredicate<S> {
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fn check(&self, req: &mut HttpRequest<S>) -> bool {
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for p in &self.0 {
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if p.check(req) {
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return true
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}
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}
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false
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}
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}
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/// Return predicate that matches if all of supplied predicate matches.
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///
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/// ```rust
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/// # extern crate actix_web;
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/// use actix_web::{pred, Application, HttpResponse};
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///
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/// fn main() {
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/// Application::new()
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/// .resource("/index.html", |r| r.route()
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/// .filter(pred::All(pred::Get())
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/// .and(pred::Header("content-type", "plain/text")))
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/// .f(|_| HttpResponse::MethodNotAllowed()));
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/// }
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/// ```
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pub fn All<S: 'static, P: Predicate<S> + 'static>(pred: P) -> AllPredicate<S> {
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AllPredicate(vec![Box::new(pred)])
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}
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/// Matches if all of supplied predicate matches.
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pub struct AllPredicate<S>(Vec<Box<Predicate<S>>>);
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impl<S> AllPredicate<S> {
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/// Add new predicate to list of predicates to check
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pub fn and<P: Predicate<S> + 'static>(mut self, pred: P) -> Self {
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self.0.push(Box::new(pred));
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self
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}
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}
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impl<S: 'static> Predicate<S> for AllPredicate<S> {
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fn check(&self, req: &mut HttpRequest<S>) -> bool {
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for p in &self.0 {
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if !p.check(req) {
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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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/// Return predicate that matches if supplied predicate does not match.
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pub fn Not<S: 'static, P: Predicate<S> + 'static>(pred: P) -> NotPredicate<S>
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{
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NotPredicate(Box::new(pred))
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}
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#[doc(hidden)]
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pub struct NotPredicate<S>(Box<Predicate<S>>);
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impl<S: 'static> Predicate<S> for NotPredicate<S> {
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fn check(&self, req: &mut HttpRequest<S>) -> bool {
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!self.0.check(req)
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}
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}
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/// Http method predicate
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#[doc(hidden)]
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pub struct MethodPredicate<S>(http::Method, PhantomData<S>);
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impl<S: 'static> Predicate<S> for MethodPredicate<S> {
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fn check(&self, req: &mut HttpRequest<S>) -> bool {
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*req.method() == self.0
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}
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}
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/// Predicate to match *GET* http method
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pub fn Get<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::GET, PhantomData)
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}
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/// Predicate to match *POST* http method
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pub fn Post<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::POST, PhantomData)
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}
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/// Predicate to match *PUT* http method
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pub fn Put<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::PUT, PhantomData)
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}
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/// Predicate to match *DELETE* http method
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pub fn Delete<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::DELETE, PhantomData)
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}
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/// Predicate to match *HEAD* http method
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pub fn Head<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::HEAD, PhantomData)
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}
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/// Predicate to match *OPTIONS* http method
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pub fn Options<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::OPTIONS, PhantomData)
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}
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/// Predicate to match *CONNECT* http method
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pub fn Connect<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::CONNECT, PhantomData)
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}
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/// Predicate to match *PATCH* http method
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pub fn Patch<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::PATCH, PhantomData)
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}
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/// Predicate to match *TRACE* http method
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pub fn Trace<S: 'static>() -> MethodPredicate<S> {
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MethodPredicate(http::Method::TRACE, PhantomData)
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}
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/// Predicate to match specified http method
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pub fn Method<S: 'static>(method: http::Method) -> MethodPredicate<S> {
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MethodPredicate(method, PhantomData)
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}
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/// Return predicate that matches if request contains specified header and value.
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pub fn Header<S: 'static>(name: &'static str, value: &'static str) -> HeaderPredicate<S>
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{
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HeaderPredicate(header::HeaderName::try_from(name).unwrap(),
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header::HeaderValue::from_static(value),
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PhantomData)
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}
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#[doc(hidden)]
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pub struct HeaderPredicate<S>(header::HeaderName, header::HeaderValue, PhantomData<S>);
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impl<S: 'static> Predicate<S> for HeaderPredicate<S> {
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fn check(&self, req: &mut HttpRequest<S>) -> bool {
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if let Some(val) = req.headers().get(&self.0) {
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return val == self.1
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}
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false
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use std::str::FromStr;
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use http::{Uri, Version, Method};
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use http::header::{self, HeaderMap};
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#[test]
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fn test_header() {
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let mut headers = HeaderMap::new();
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headers.insert(header::TRANSFER_ENCODING,
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header::HeaderValue::from_static("chunked"));
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let mut req = HttpRequest::new(
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Method::GET, Uri::from_str("/").unwrap(), Version::HTTP_11, headers, None);
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let pred = Header("transfer-encoding", "chunked");
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assert!(pred.check(&mut req));
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let pred = Header("transfer-encoding", "other");
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assert!(!pred.check(&mut req));
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let pred = Header("content-type", "other");
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assert!(!pred.check(&mut req));
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}
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#[test]
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fn test_methods() {
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let mut req = HttpRequest::new(
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Method::GET, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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let mut req2 = HttpRequest::new(
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Method::POST, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Get().check(&mut req));
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assert!(!Get().check(&mut req2));
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assert!(Post().check(&mut req2));
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assert!(!Post().check(&mut req));
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let mut r = HttpRequest::new(
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Method::PUT, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Put().check(&mut r));
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assert!(!Put().check(&mut req));
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let mut r = HttpRequest::new(
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Method::DELETE, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Delete().check(&mut r));
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assert!(!Delete().check(&mut req));
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let mut r = HttpRequest::new(
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Method::HEAD, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Head().check(&mut r));
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assert!(!Head().check(&mut req));
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let mut r = HttpRequest::new(
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Method::OPTIONS, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Options().check(&mut r));
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assert!(!Options().check(&mut req));
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let mut r = HttpRequest::new(
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Method::CONNECT, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Connect().check(&mut r));
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assert!(!Connect().check(&mut req));
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let mut r = HttpRequest::new(
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Method::PATCH, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Patch().check(&mut r));
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assert!(!Patch().check(&mut req));
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let mut r = HttpRequest::new(
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Method::TRACE, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Trace().check(&mut r));
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assert!(!Trace().check(&mut req));
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}
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#[test]
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fn test_preds() {
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let mut r = HttpRequest::new(
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Method::TRACE, Uri::from_str("/").unwrap(),
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Version::HTTP_11, HeaderMap::new(), None);
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assert!(Not(Get()).check(&mut r));
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assert!(!Not(Trace()).check(&mut r));
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assert!(All(Trace()).and(Trace()).check(&mut r));
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assert!(!All(Get()).and(Trace()).check(&mut r));
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assert!(Any(Get()).or(Trace()).check(&mut r));
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assert!(!Any(Get()).or(Get()).check(&mut r));
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}
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}
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