Add layer to validate requests

tower-http/CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Added
 
 - Add `NormalizePath` middleware
+- Add `ValidateRequest` middleware
 
 ## Changed
 

tower-http/Cargo.toml

@@ -76,6 +76,7 @@ full = [
     "timeout",
     "trace",
     "util",
+    "validate-request",
 ]
 
 add-extension = []
@@ -98,6 +99,7 @@ set-status = []
 timeout = ["tokio/time"]
 trace = ["tracing"]
 util = ["tower"]
+validate-request = ["mime"]
 
 compression-br = ["async-compression/brotli", "tokio-util", "tokio"]
 compression-deflate = ["async-compression/zlib", "tokio-util", "tokio"]

tower-http/src/lib.rs

@@ -23,6 +23,7 @@
 //!     sensitive_headers::SetSensitiveRequestHeadersLayer,
 //!     set_header::SetResponseHeaderLayer,
 //!     trace::TraceLayer,
+//!     validate_request::ValidateRequestHeaderLayer,
 //! };
 //! use tower::{ServiceBuilder, service_fn, make::Shared};
 //! use http::{Request, Response, header::{HeaderName, CONTENT_TYPE, AUTHORIZATION}};
@@ -71,6 +72,8 @@
 //!         .layer(SetResponseHeaderLayer::overriding(CONTENT_TYPE, content_length_from_response))
 //!         // Authorize requests using a token
 //!         .layer(RequireAuthorizationLayer::bearer("passwordlol"))
+//!         // Accept only application/json, application/* and */* in a request's ACCEPT header
+//!         .layer(ValidateRequestHeaderLayer::accept("application/json"))
 //!         // Wrap a `Service` in our middleware stack
 //!         .service_fn(handler);
 //!
@@ -319,6 +322,9 @@ mod builder;
 #[doc(inline)]
 pub use self::builder::ServiceBuilderExt;
 
+#[cfg(feature = "validate-request")]
+pub mod validate_request;
+
 /// The latency unit used to report latencies by middleware.
 #[non_exhaustive]
 #[derive(Copy, Clone, Debug)]