From 3821ca106318b22e23f4088ddc33260f06c47352 Mon Sep 17 00:00:00 2001
From: Rob Ede <robjtede@icloud.com>
Date: Tue, 8 Mar 2022 01:07:25 +0000
Subject: [PATCH] relax response parsing

fixes #2103
---
 actix-http/CHANGES.md        | 4 ++++
 actix-http/src/h1/decoder.rs | 5 ++++-
 awc/src/request.rs           | 2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/actix-http/CHANGES.md b/actix-http/CHANGES.md
index 7be5dccff..ce3f14059 100644
--- a/actix-http/CHANGES.md
+++ b/actix-http/CHANGES.md
@@ -1,6 +1,10 @@
 # Changes
 
 ## Unreleased - 2021-xx-xx
+### Fixed
+- Allow spaces between header name and colon when parsing responses. [#2684]
+
+[#2684]: https://github.com/actix/actix-web/issues/2684
 
 
 ## 3.0.2 - 2022-03-05
diff --git a/actix-http/src/h1/decoder.rs b/actix-http/src/h1/decoder.rs
index 17b9b695c..5a2477cba 100644
--- a/actix-http/src/h1/decoder.rs
+++ b/actix-http/src/h1/decoder.rs
@@ -295,8 +295,11 @@ impl MessageType for ResponseHead {
         let (len, ver, status, h_len) = {
             let mut parsed: [httparse::Header<'_>; MAX_HEADERS] = EMPTY_HEADER_ARRAY;
 
+            let mut config = httparse::ParserConfig::default();
+            config.allow_spaces_after_header_name_in_responses(true);
+
             let mut res = httparse::Response::new(&mut parsed);
-            match res.parse(src)? {
+            match config.parse_response(&mut res, src)? {
                 httparse::Status::Complete(len) => {
                     let version = if res.version.unwrap() == 1 {
                         Version::HTTP_11
diff --git a/awc/src/request.rs b/awc/src/request.rs
index 8bcf1ee01..102db3c16 100644
--- a/awc/src/request.rs
+++ b/awc/src/request.rs
@@ -505,7 +505,7 @@ impl fmt::Debug for ClientRequest {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         writeln!(
             f,
-            "\nClientRequest {:?} {}:{}",
+            "\nClientRequest {:?} {} {}",
             self.head.version, self.head.method, self.head.uri
         )?;
         writeln!(f, "  headers:")?;