Layer to application/x-www-form-urlencoded bodies

crates/http/src/layers/json_request.rs

@@ -19,7 +19,8 @@ use futures_util::{
     future::{Either, MapErr},
     FutureExt, TryFutureExt,
 };
-use http::{header::CONTENT_TYPE, HeaderValue, Request};
+use headers::{ContentType, HeaderMapExt};
+use http::Request;
 use http_body::Full;
 use serde::Serialize;
 use thiserror::Error;
@@ -83,9 +84,7 @@ where
     fn call(&mut self, request: Request<T>) -> Self::Future {
         let (mut parts, body) = request.into_parts();
 
-        parts
-            .headers
-            .insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
+        parts.headers.typed_insert(ContentType::json());
 
         let body = match serde_json::to_vec(&body) {
             Ok(body) => Full::new(Bytes::from(body)),