mirror of
https://github.com/fafhrd91/actix-web
synced 2024-11-24 08:22:59 +01:00
408 lines
12 KiB
Rust
408 lines
12 KiB
Rust
//! Request extractors
|
|
|
|
use actix_http::error::Error;
|
|
use futures::future::ok;
|
|
use futures::{future, Async, Future, IntoFuture, Poll};
|
|
|
|
use crate::dev::Payload;
|
|
use crate::request::HttpRequest;
|
|
|
|
/// Trait implemented by types that can be extracted from request.
|
|
///
|
|
/// Types that implement this trait can be used with `Route` handlers.
|
|
pub trait FromRequest: Sized {
|
|
/// The associated error which can be returned.
|
|
type Error: Into<Error>;
|
|
|
|
/// Future that resolves to a Self
|
|
type Future: IntoFuture<Item = Self, Error = Self::Error>;
|
|
|
|
/// Configuration for this extractor
|
|
type Config: Default + 'static;
|
|
|
|
/// Convert request to a Self
|
|
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future;
|
|
|
|
/// Convert request to a Self
|
|
///
|
|
/// This method uses `Payload::None` as payload stream.
|
|
fn extract(req: &HttpRequest) -> Self::Future {
|
|
Self::from_request(req, &mut Payload::None)
|
|
}
|
|
|
|
/// Create and configure config instance.
|
|
fn configure<F>(f: F) -> Self::Config
|
|
where
|
|
F: FnOnce(Self::Config) -> Self::Config,
|
|
{
|
|
f(Self::Config::default())
|
|
}
|
|
}
|
|
|
|
/// Optionally extract a field from the request
|
|
///
|
|
/// If the FromRequest for T fails, return None rather than returning an error response
|
|
///
|
|
/// ## Example
|
|
///
|
|
/// ```rust
|
|
/// # #[macro_use] extern crate serde_derive;
|
|
/// use actix_web::{web, dev, App, Error, HttpRequest, FromRequest};
|
|
/// use actix_web::error::ErrorBadRequest;
|
|
/// use rand;
|
|
///
|
|
/// #[derive(Debug, Deserialize)]
|
|
/// struct Thing {
|
|
/// name: String
|
|
/// }
|
|
///
|
|
/// impl FromRequest for Thing {
|
|
/// type Error = Error;
|
|
/// type Future = Result<Self, Self::Error>;
|
|
/// type Config = ();
|
|
///
|
|
/// fn from_request(req: &HttpRequest, payload: &mut dev::Payload) -> Self::Future {
|
|
/// if rand::random() {
|
|
/// Ok(Thing { name: "thingy".into() })
|
|
/// } else {
|
|
/// Err(ErrorBadRequest("no luck"))
|
|
/// }
|
|
///
|
|
/// }
|
|
/// }
|
|
///
|
|
/// /// extract `Thing` from request
|
|
/// fn index(supplied_thing: Option<Thing>) -> String {
|
|
/// match supplied_thing {
|
|
/// // Puns not intended
|
|
/// Some(thing) => format!("Got something: {:?}", thing),
|
|
/// None => format!("No thing!")
|
|
/// }
|
|
/// }
|
|
///
|
|
/// fn main() {
|
|
/// let app = App::new().service(
|
|
/// web::resource("/users/:first").route(
|
|
/// web::post().to(index))
|
|
/// );
|
|
/// }
|
|
/// ```
|
|
impl<T: 'static> FromRequest for Option<T>
|
|
where
|
|
T: FromRequest,
|
|
T::Future: 'static,
|
|
{
|
|
type Config = T::Config;
|
|
type Error = Error;
|
|
type Future = Box<Future<Item = Option<T>, Error = Error>>;
|
|
|
|
#[inline]
|
|
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
|
|
Box::new(
|
|
T::from_request(req, payload)
|
|
.into_future()
|
|
.then(|r| match r {
|
|
Ok(v) => future::ok(Some(v)),
|
|
Err(e) => {
|
|
log::debug!("Error for Option<T> extractor: {}", e.into());
|
|
future::ok(None)
|
|
}
|
|
}),
|
|
)
|
|
}
|
|
}
|
|
|
|
/// Optionally extract a field from the request or extract the Error if unsuccessful
|
|
///
|
|
/// If the `FromRequest` for T fails, inject Err into handler rather than returning an error response
|
|
///
|
|
/// ## Example
|
|
///
|
|
/// ```rust
|
|
/// # #[macro_use] extern crate serde_derive;
|
|
/// use actix_web::{web, dev, App, Result, Error, HttpRequest, FromRequest};
|
|
/// use actix_web::error::ErrorBadRequest;
|
|
/// use rand;
|
|
///
|
|
/// #[derive(Debug, Deserialize)]
|
|
/// struct Thing {
|
|
/// name: String
|
|
/// }
|
|
///
|
|
/// impl FromRequest for Thing {
|
|
/// type Error = Error;
|
|
/// type Future = Result<Thing, Error>;
|
|
/// type Config = ();
|
|
///
|
|
/// fn from_request(req: &HttpRequest, payload: &mut dev::Payload) -> Self::Future {
|
|
/// if rand::random() {
|
|
/// Ok(Thing { name: "thingy".into() })
|
|
/// } else {
|
|
/// Err(ErrorBadRequest("no luck"))
|
|
/// }
|
|
/// }
|
|
/// }
|
|
///
|
|
/// /// extract `Thing` from request
|
|
/// fn index(supplied_thing: Result<Thing>) -> String {
|
|
/// match supplied_thing {
|
|
/// Ok(thing) => format!("Got thing: {:?}", thing),
|
|
/// Err(e) => format!("Error extracting thing: {}", e)
|
|
/// }
|
|
/// }
|
|
///
|
|
/// fn main() {
|
|
/// let app = App::new().service(
|
|
/// web::resource("/users/:first").route(web::post().to(index))
|
|
/// );
|
|
/// }
|
|
/// ```
|
|
impl<T: 'static> FromRequest for Result<T, T::Error>
|
|
where
|
|
T: FromRequest,
|
|
T::Future: 'static,
|
|
T::Error: 'static,
|
|
{
|
|
type Config = T::Config;
|
|
type Error = Error;
|
|
type Future = Box<Future<Item = Result<T, T::Error>, Error = Error>>;
|
|
|
|
#[inline]
|
|
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
|
|
Box::new(
|
|
T::from_request(req, payload)
|
|
.into_future()
|
|
.then(|res| match res {
|
|
Ok(v) => ok(Ok(v)),
|
|
Err(e) => ok(Err(e)),
|
|
}),
|
|
)
|
|
}
|
|
}
|
|
|
|
#[doc(hidden)]
|
|
impl FromRequest for () {
|
|
type Config = ();
|
|
type Error = Error;
|
|
type Future = Result<(), Error>;
|
|
|
|
fn from_request(_: &HttpRequest, _: &mut Payload) -> Self::Future {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
macro_rules! tuple_from_req ({$fut_type:ident, $(($n:tt, $T:ident)),+} => {
|
|
|
|
/// FromRequest implementation for tuple
|
|
#[doc(hidden)]
|
|
impl<$($T: FromRequest + 'static),+> FromRequest for ($($T,)+)
|
|
{
|
|
type Error = Error;
|
|
type Future = $fut_type<$($T),+>;
|
|
type Config = ($($T::Config),+);
|
|
|
|
fn from_request(req: &HttpRequest, payload: &mut Payload) -> Self::Future {
|
|
$fut_type {
|
|
items: <($(Option<$T>,)+)>::default(),
|
|
futs: ($($T::from_request(req, payload).into_future(),)+),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[doc(hidden)]
|
|
pub struct $fut_type<$($T: FromRequest),+> {
|
|
items: ($(Option<$T>,)+),
|
|
futs: ($(<$T::Future as futures::IntoFuture>::Future,)+),
|
|
}
|
|
|
|
impl<$($T: FromRequest),+> Future for $fut_type<$($T),+>
|
|
{
|
|
type Item = ($($T,)+);
|
|
type Error = Error;
|
|
|
|
fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
|
|
let mut ready = true;
|
|
|
|
$(
|
|
if self.items.$n.is_none() {
|
|
match self.futs.$n.poll() {
|
|
Ok(Async::Ready(item)) => {
|
|
self.items.$n = Some(item);
|
|
}
|
|
Ok(Async::NotReady) => ready = false,
|
|
Err(e) => return Err(e.into()),
|
|
}
|
|
}
|
|
)+
|
|
|
|
if ready {
|
|
Ok(Async::Ready(
|
|
($(self.items.$n.take().unwrap(),)+)
|
|
))
|
|
} else {
|
|
Ok(Async::NotReady)
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
#[rustfmt::skip]
|
|
mod m {
|
|
use super::*;
|
|
|
|
tuple_from_req!(TupleFromRequest1, (0, A));
|
|
tuple_from_req!(TupleFromRequest2, (0, A), (1, B));
|
|
tuple_from_req!(TupleFromRequest3, (0, A), (1, B), (2, C));
|
|
tuple_from_req!(TupleFromRequest4, (0, A), (1, B), (2, C), (3, D));
|
|
tuple_from_req!(TupleFromRequest5, (0, A), (1, B), (2, C), (3, D), (4, E));
|
|
tuple_from_req!(TupleFromRequest6, (0, A), (1, B), (2, C), (3, D), (4, E), (5, F));
|
|
tuple_from_req!(TupleFromRequest7, (0, A), (1, B), (2, C), (3, D), (4, E), (5, F), (6, G));
|
|
tuple_from_req!(TupleFromRequest8, (0, A), (1, B), (2, C), (3, D), (4, E), (5, F), (6, G), (7, H));
|
|
tuple_from_req!(TupleFromRequest9, (0, A), (1, B), (2, C), (3, D), (4, E), (5, F), (6, G), (7, H), (8, I));
|
|
tuple_from_req!(TupleFromRequest10, (0, A), (1, B), (2, C), (3, D), (4, E), (5, F), (6, G), (7, H), (8, I), (9, J));
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use actix_http::http::header;
|
|
use actix_router::ResourceDef;
|
|
use bytes::Bytes;
|
|
use serde_derive::Deserialize;
|
|
|
|
use super::*;
|
|
use crate::test::{block_on, TestRequest};
|
|
use crate::types::{Form, FormConfig, Path, Query};
|
|
|
|
#[derive(Deserialize, Debug, PartialEq)]
|
|
struct Info {
|
|
hello: String,
|
|
}
|
|
|
|
#[test]
|
|
fn test_option() {
|
|
let (req, mut pl) = TestRequest::with_header(
|
|
header::CONTENT_TYPE,
|
|
"application/x-www-form-urlencoded",
|
|
)
|
|
.route_data(FormConfig::default().limit(4096))
|
|
.to_http_parts();
|
|
|
|
let r = block_on(Option::<Form<Info>>::from_request(&req, &mut pl)).unwrap();
|
|
assert_eq!(r, None);
|
|
|
|
let (req, mut pl) = TestRequest::with_header(
|
|
header::CONTENT_TYPE,
|
|
"application/x-www-form-urlencoded",
|
|
)
|
|
.header(header::CONTENT_LENGTH, "9")
|
|
.set_payload(Bytes::from_static(b"hello=world"))
|
|
.to_http_parts();
|
|
|
|
let r = block_on(Option::<Form<Info>>::from_request(&req, &mut pl)).unwrap();
|
|
assert_eq!(
|
|
r,
|
|
Some(Form(Info {
|
|
hello: "world".into()
|
|
}))
|
|
);
|
|
|
|
let (req, mut pl) = TestRequest::with_header(
|
|
header::CONTENT_TYPE,
|
|
"application/x-www-form-urlencoded",
|
|
)
|
|
.header(header::CONTENT_LENGTH, "9")
|
|
.set_payload(Bytes::from_static(b"bye=world"))
|
|
.to_http_parts();
|
|
|
|
let r = block_on(Option::<Form<Info>>::from_request(&req, &mut pl)).unwrap();
|
|
assert_eq!(r, None);
|
|
}
|
|
|
|
#[test]
|
|
fn test_result() {
|
|
let (req, mut pl) = TestRequest::with_header(
|
|
header::CONTENT_TYPE,
|
|
"application/x-www-form-urlencoded",
|
|
)
|
|
.header(header::CONTENT_LENGTH, "11")
|
|
.set_payload(Bytes::from_static(b"hello=world"))
|
|
.to_http_parts();
|
|
|
|
let r = block_on(Result::<Form<Info>, Error>::from_request(&req, &mut pl))
|
|
.unwrap()
|
|
.unwrap();
|
|
assert_eq!(
|
|
r,
|
|
Form(Info {
|
|
hello: "world".into()
|
|
})
|
|
);
|
|
|
|
let (req, mut pl) = TestRequest::with_header(
|
|
header::CONTENT_TYPE,
|
|
"application/x-www-form-urlencoded",
|
|
)
|
|
.header(header::CONTENT_LENGTH, "9")
|
|
.set_payload(Bytes::from_static(b"bye=world"))
|
|
.to_http_parts();
|
|
|
|
let r =
|
|
block_on(Result::<Form<Info>, Error>::from_request(&req, &mut pl)).unwrap();
|
|
assert!(r.is_err());
|
|
}
|
|
|
|
#[derive(Deserialize)]
|
|
struct MyStruct {
|
|
key: String,
|
|
value: String,
|
|
}
|
|
|
|
#[derive(Deserialize)]
|
|
struct Id {
|
|
id: String,
|
|
}
|
|
|
|
#[derive(Deserialize)]
|
|
struct Test2 {
|
|
key: String,
|
|
value: u32,
|
|
}
|
|
|
|
#[test]
|
|
fn test_request_extract() {
|
|
let mut req = TestRequest::with_uri("/name/user1/?id=test").to_srv_request();
|
|
|
|
let resource = ResourceDef::new("/{key}/{value}/");
|
|
resource.match_path(req.match_info_mut());
|
|
|
|
let (req, mut pl) = req.into_parts();
|
|
let s = Path::<MyStruct>::from_request(&req, &mut pl).unwrap();
|
|
assert_eq!(s.key, "name");
|
|
assert_eq!(s.value, "user1");
|
|
|
|
let s = Path::<(String, String)>::from_request(&req, &mut pl).unwrap();
|
|
assert_eq!(s.0, "name");
|
|
assert_eq!(s.1, "user1");
|
|
|
|
let s = Query::<Id>::from_request(&req, &mut pl).unwrap();
|
|
assert_eq!(s.id, "test");
|
|
|
|
let mut req = TestRequest::with_uri("/name/32/").to_srv_request();
|
|
let resource = ResourceDef::new("/{key}/{value}/");
|
|
resource.match_path(req.match_info_mut());
|
|
|
|
let (req, mut pl) = req.into_parts();
|
|
let s = Path::<Test2>::from_request(&req, &mut pl).unwrap();
|
|
assert_eq!(s.as_ref().key, "name");
|
|
assert_eq!(s.value, 32);
|
|
|
|
let s = Path::<(String, u8)>::from_request(&req, &mut pl).unwrap();
|
|
assert_eq!(s.0, "name");
|
|
assert_eq!(s.1, 32);
|
|
|
|
let res = Path::<Vec<String>>::from_request(&req, &mut pl).unwrap();
|
|
assert_eq!(res[0], "name".to_owned());
|
|
assert_eq!(res[1], "32".to_owned());
|
|
}
|
|
}
|