From 9d440ccb3dd9aa40d6df96d5ecce80f51080772a Mon Sep 17 00:00:00 2001
From: Mohammad Nejati <ashtumashtum@gmail.com>
Date: Wed, 15 Jul 2026 08:24:36 +0330
Subject: [PATCH] parse zstd Content-Encoding

---
 src/detail/header.cpp  |  6 ++++++
 test/unit/metadata.cpp | 14 ++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/detail/header.cpp b/src/detail/header.cpp
index 4ede1bdf..acc684ba 100644
--- a/src/detail/header.cpp
+++ b/src/detail/header.cpp
@@ -669,6 +669,12 @@ on_insert_content_encoding(
         md.content_encoding.coding =
             content_coding::br;
     }
+    else if(grammar::ci_is_equal(
+        *rv->begin(), "zstd"))
+    {
+        md.content_encoding.coding =
+            content_coding::zstd;
+    }
     else
     {
         md.content_encoding.coding =
diff --git a/test/unit/metadata.cpp b/test/unit/metadata.cpp
index 59ae2691..b941738c 100644
--- a/test/unit/metadata.cpp
+++ b/test/unit/metadata.cpp
@@ -300,6 +300,20 @@ struct metadata_test
             [](message_base&){},
             { ok, 1, content_coding::gzip });
 
+        check(
+            "GET / HTTP/1.1\r\n"
+            "Content-Encoding: br\r\n"
+            "\r\n",
+            [](message_base&){},
+            { ok, 1, content_coding::br });
+
+        check(
+            "GET / HTTP/1.1\r\n"
+            "Content-Encoding: zstd\r\n"
+            "\r\n",
+            [](message_base&){},
+            { ok, 1, content_coding::zstd });
+
         check(
             "GET / HTTP/1.1\r\n"
             "Content-Encoding: gzip, deflate\r\n"