From 438011dd72c50a309d6ca0de78b3ac6bb2189f57 Mon Sep 17 00:00:00 2001
From: Paul Hooijenga <paul@founda.com>
Date: Wed, 22 Nov 2023 15:44:13 +0100
Subject: [PATCH] Do not encode zero-sized response bodies

---
 actix-http/CHANGES.md              | 4 ++++
 actix-http/src/encoding/encoder.rs | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/actix-http/CHANGES.md b/actix-http/CHANGES.md
index 318df5a4d..fc49bc931 100644
--- a/actix-http/CHANGES.md
+++ b/actix-http/CHANGES.md
@@ -6,6 +6,10 @@
 
 - Updated `zstd` dependency to `0.13`.
 
+### Fixed
+
+- Do not encode zero-sized response bodies
+
 ## 3.4.0
 
 ### Added
diff --git a/actix-http/src/encoding/encoder.rs b/actix-http/src/encoding/encoder.rs
index 527bfebaa..e084aa564 100644
--- a/actix-http/src/encoding/encoder.rs
+++ b/actix-http/src/encoding/encoder.rs
@@ -52,7 +52,7 @@ impl<B: MessageBody> Encoder<B> {
 
     pub fn response(encoding: ContentEncoding, head: &mut ResponseHead, body: B) -> Self {
         // no need to compress an empty body
-        if matches!(body.size(), BodySize::None) {
+        if matches!(body.size(), BodySize::None | BodySize::Sized(0)) {
             return Self::none();
         }