From da44007cffef9f02501a791a65171c3eaa7eb73d Mon Sep 17 00:00:00 2001
From: Matt Palmer <mpalmer@hezmatt.org>
Date: Mon, 15 Apr 2024 12:48:55 +1000
Subject: [PATCH] Return 415 rather than 400 on Urlencoded Content-Type
 mismatch

---
 actix-web/CHANGES.md       | 2 ++
 actix-web/src/error/mod.rs | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/actix-web/CHANGES.md b/actix-web/CHANGES.md
index c6454ed65..82b5e6bee 100644
--- a/actix-web/CHANGES.md
+++ b/actix-web/CHANGES.md
@@ -10,6 +10,8 @@
 
 - Minimum supported Rust version (MSRV) is now 1.72.
 
+- the Urlencoded extractor now returns 415 (Media Type Unsupported) if the request's `Content-Type` is not `application/x-www-form-urlencoded`, rather than 400 (Bad Request).
+
 ## 4.5.1
 
 ### Fixed
diff --git a/actix-web/src/error/mod.rs b/actix-web/src/error/mod.rs
index 91a6bcc3f..25535332c 100644
--- a/actix-web/src/error/mod.rs
+++ b/actix-web/src/error/mod.rs
@@ -100,6 +100,7 @@ impl ResponseError for UrlencodedError {
         match self {
             Self::Overflow { .. } => StatusCode::PAYLOAD_TOO_LARGE,
             Self::UnknownLength => StatusCode::LENGTH_REQUIRED,
+            Self::ContentType => StatusCode::UNSUPPORTED_MEDIA_TYPE,
             Self::Payload(err) => err.status_code(),
             _ => StatusCode::BAD_REQUEST,
         }
@@ -232,7 +233,7 @@ mod tests {
         let resp = UrlencodedError::UnknownLength.error_response();
         assert_eq!(resp.status(), StatusCode::LENGTH_REQUIRED);
         let resp = UrlencodedError::ContentType.error_response();
-        assert_eq!(resp.status(), StatusCode::BAD_REQUEST);
+        assert_eq!(resp.status(), StatusCode::UNSUPPORTED_MEDIA_TYPE);
     }
 
     #[test]