non exhaustive content encoding (#2377)

Cargo.toml

@@ -99,7 +99,7 @@ regex = "1.4"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 serde_urlencoded = "0.7"
-smallvec = "1.6"
+smallvec = "1.6.1"
 socket2 = "0.4.0"
 time = { version = "0.2.23", default-features = false, features = ["std"] }
 url = "2.1"

actix-http/CHANGES.md

@@ -2,6 +2,7 @@
 
 ## Unreleased - 2021-xx-xx
 ### Changed
+* `ContentEncoding` is now marked `#[non_exhaustive]`. [#2377]
 * Minimum supported Rust version (MSRV) is now 1.51.
 
 ### Fixed
@@ -12,12 +13,14 @@
 [#2364]: https://github.com/actix/actix-web/pull/2364
 [#2375]: https://github.com/actix/actix-web/pull/2375
 [#2344]: https://github.com/actix/actix-web/pull/2344
+[#2377]: https://github.com/actix/actix-web/pull/2377
 
 
 ## 3.0.0-beta.8 - 2021-08-09
 ### Fixed
 * Potential HTTP request smuggling vulnerabilities. [RUSTSEC-2021-0081](https://github.com/rustsec/advisory-db/pull/977)
 
+
 ## 3.0.0-beta.8 - 2021-06-26
 ### Changed
 * Change compression algorithm features flags. [#2250]

actix-http/Cargo.toml

@@ -73,7 +73,7 @@ rand = "0.8"
 regex = "1.3"
 serde = "1.0"
 sha-1 = "0.9"
-smallvec = "1.6"
+smallvec = "1.6.1"
 time = { version = "0.2.23", default-features = false, features = ["std"] }
 tokio = { version = "1.2", features = ["sync"] }
 

actix-http/src/encoding/decoder.rs

@@ -1,7 +1,6 @@
 //! Stream decoders.
 
 use std::{
-    convert::TryFrom,
     future::Future,
     io::{self, Write as _},
     pin::Pin,
@@ -81,7 +80,7 @@ where
         let encoding = headers
             .get(&CONTENT_ENCODING)
             .and_then(|val| val.to_str().ok())
-            .and_then(|x| ContentEncoding::try_from(x).ok())
+            .and_then(|x| x.parse().ok())
             .unwrap_or(ContentEncoding::Identity);
 
         Self::new(stream, encoding)

actix-http/src/header/shared/content_encoding.rs

@@ -1,5 +1,6 @@
-use std::{convert::TryFrom, error, fmt, str::FromStr};
+use std::{convert::TryFrom, str::FromStr};
 
+use derive_more::{Display, Error};
 use http::header::InvalidHeaderValue;
 
 use crate::{
@@ -11,19 +12,13 @@ use crate::{
 /// Error return when a content encoding is unknown.
 ///
 /// Example: 'compress'
-#[derive(Debug)]
+#[derive(Debug, Display, Error)]
+#[display(fmt = "unsupported content encoding")]
 pub struct ContentEncodingParseError;
 
-impl fmt::Display for ContentEncodingParseError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "Unsupported content encoding")
-    }
-}
-
-impl error::Error for ContentEncodingParseError {}
-
 /// Represents a supported content encoding.
-#[derive(Copy, Clone, PartialEq, Debug)]
+#[derive(Debug, Clone, Copy, PartialEq)]
+#[non_exhaustive]
 pub enum ContentEncoding {
     /// Automatically select encoding based on encoding negotiation.
     Auto,

src/scope.rs

@@ -41,9 +41,9 @@ type HttpNewService = BoxServiceFactory<(), ServiceRequest, ServiceResponse, Err
 /// fn main() {
 ///     let app = App::new().service(
 ///         web::scope("/{project_id}/")
-///             .service(web::resource("/path1").to(|| async { HttpResponse::Ok() }))
+///             .service(web::resource("/path1").to(|| async { "OK" }))
 ///             .service(web::resource("/path2").route(web::get().to(|| HttpResponse::Ok())))
-///             .service(web::resource("/path3").route(web::head().to(|| HttpResponse::MethodNotAllowed())))
+///             .service(web::resource("/path3").route(web::head().to(HttpResponse::MethodNotAllowed)))
 ///     );
 /// }
 /// ```

src/test.rs

@@ -56,7 +56,7 @@ pub fn default_service(
 /// async fn test_init_service() {
 ///     let app = test::init_service(
 ///         App::new()
-///             .service(web::resource("/test").to(|| async { HttpResponse::Ok() }))
+///             .service(web::resource("/test").to(|| async { "OK" }))
 ///     ).await;
 ///
 ///     // Create request object

src/types/form.rs

@@ -30,7 +30,7 @@ use crate::{
 ///
 /// # Extractor
 /// To extract typed data from a request body, the inner type `T` must implement the
-/// [`serde::Deserialize`] trait.
+/// [`DeserializeOwned`] trait.
 ///
 /// Use [`FormConfig`] to configure extraction process.
 ///

src/types/json.rs

@@ -97,19 +97,13 @@ impl<T> ops::DerefMut for Json<T> {
     }
 }
 
-impl<T> fmt::Display for Json<T>
+impl<T: fmt::Display> fmt::Display for Json<T> {
-where
-    T: fmt::Display,
-{
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.0, f)
     }
 }
 
-impl<T> Serialize for Json<T>
+impl<T: Serialize> Serialize for Json<T> {
-where
-    T: Serialize,
-{
     fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
     where
         S: serde::Serializer,
@@ -133,10 +127,7 @@ impl<T: Serialize> Responder for Json<T> {
 }
 
 /// See [here](#extractor) for example of usage as an extractor.
-impl<T> FromRequest for Json<T>
+impl<T: DeserializeOwned + 'static> FromRequest for Json<T> {
-where
-    T: DeserializeOwned + 'static,
-{
     type Error = Error;
     type Future = JsonExtractFut<T>;
     type Config = JsonConfig;
@@ -166,10 +157,7 @@ pub struct JsonExtractFut<T> {
     err_handler: JsonErrorHandler,
 }
 
-impl<T> Future for JsonExtractFut<T>
+impl<T: DeserializeOwned + 'static> Future for JsonExtractFut<T> {
-where
-    T: DeserializeOwned + 'static,
-{
     type Output = Result<Json<T>, Error>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
@@ -311,10 +299,7 @@ pub enum JsonBody<T> {
 
 impl<T> Unpin for JsonBody<T> {}
 
-impl<T> JsonBody<T>
+impl<T: DeserializeOwned> JsonBody<T> {
-where
-    T: DeserializeOwned + 'static,
-{
     /// Create a new future to decode a JSON request payload.
     #[allow(clippy::borrow_interior_mutable_const)]
     pub fn new(
@@ -395,10 +380,7 @@ where
     }
 }
 
-impl<T> Future for JsonBody<T>
+impl<T: DeserializeOwned + 'static> Future for JsonBody<T> {
-where
-    T: DeserializeOwned + 'static,
-{
     type Output = Result<T, JsonPayloadError>;
 
     fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {

src/types/query.rs

@@ -3,14 +3,14 @@
 use std::{fmt, ops, sync::Arc};
 
 use actix_utils::future::{err, ok, Ready};
-use serde::de;
+use serde::de::DeserializeOwned;
 
 use crate::{dev::Payload, error::QueryPayloadError, Error, FromRequest, HttpRequest};
 
 /// Extract typed information from the request's query.
 ///
 /// To extract typed data from the URL query string, the inner type `T` must implement the
-/// [`serde::Deserialize`] trait.
+/// [`DeserializeOwned`] trait.
 ///
 /// Use [`QueryConfig`] to configure extraction process.
 ///
@@ -50,14 +50,14 @@ use crate::{dev::Payload, error::QueryPayloadError, Error, FromRequest, HttpRequ
 ///     "OK".to_string()
 /// }
 ///
-/// // Or use `.0`, which is equivalent to `.into_inner()`.
+/// // Or use destructuring, which is equivalent to `.into_inner()`.
 /// #[get("/debug2")]
-/// async fn debug2(info: web::Query<AuthRequest>) -> String {
+/// async fn debug2(web::Query(info): web::Query<AuthRequest>) -> String {
-///     dbg!("Authorization object={:?}", info.0);
+///     dbg!("Authorization object = {:?}", info);
 ///     "OK".to_string()
 /// }
 /// ```
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug)]
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord)]
 pub struct Query<T>(pub T);
 
 impl<T> Query<T> {
@@ -65,8 +65,10 @@ impl<T> Query<T> {
     pub fn into_inner(self) -> T {
         self.0
     }
+}
 
-    /// Deserialize `T` from a URL encoded query parameter string.
+impl<T: DeserializeOwned> Query<T> {
+    /// Deserialize a `T` from the URL encoded query parameter string.
     ///
     /// ```
     /// # use std::collections::HashMap;
@@ -76,10 +78,7 @@ impl<T> Query<T> {
     /// assert_eq!(numbers.get("two"), Some(&2));
     /// assert!(numbers.get("three").is_none());
     /// ```
-    pub fn from_query(query_str: &str) -> Result<Self, QueryPayloadError>
+    pub fn from_query(query_str: &str) -> Result<Self, QueryPayloadError> {
-    where
-        T: de::DeserializeOwned,
-    {
         serde_urlencoded::from_str::<T>(query_str)
             .map(Self)
             .map_err(QueryPayloadError::Deserialize)
@@ -107,10 +106,7 @@ impl<T: fmt::Display> fmt::Display for Query<T> {
 }
 
 /// See [here](#usage) for example of usage as an extractor.
-impl<T> FromRequest for Query<T>
+impl<T: DeserializeOwned> FromRequest for Query<T> {
-where
-    T: de::DeserializeOwned,
-{
     type Error = Error;
     type Future = Ready<Result<Self, Error>>;
     type Config = QueryConfig;
@@ -165,7 +161,7 @@ where
 /// let query_cfg = web::QueryConfig::default()
 ///     // use custom error handler
 ///     .error_handler(|err, req| {
-///         error::InternalError::from_response(err, HttpResponse::Conflict().into()).into()
+///         error::InternalError::from_response(err, HttpResponse::Conflict().finish()).into()
 ///     });
 ///
 /// App::new()