Transform header names to lowercase (#125)

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.1.0-dev
+
+- Transform headers to lowercase.
+
 ## 2.1.0
 
 - Require Dart `3.0.0`

lib/src/hpack/hpack.dart

@@ -49,7 +49,10 @@ class Header {
   Header(this.name, this.value, {this.neverIndexed = false});
 
   factory Header.ascii(String name, String value) {
-    return Header(ascii.encode(name), ascii.encode(value));
+    // Specs: `However, header field names MUST be converted to lowercase prior
+    // to their encoding in HTTP/2. A request or response containing uppercase
+    // header field names MUST be treated as malformed (Section 8.1.2.6).`
+    return Header(ascii.encode(name.toLowerCase()), ascii.encode(value));
   }
 }
 

pubspec.yaml

@@ -1,5 +1,5 @@
 name: http2
-version: 2.1.0
+version: 2.1.0-dev
 description: A HTTP/2 implementation in Dart.
 repository: https://github.com/dart-lang/http2