fix(conformance): forbidden duplicate headers

zio · Sep 30, 2024 · 698dd7c · 698dd7c
1 parent 969afa9
commit 698dd7c
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/zio-http/shared/src/main/scala/zio/http/internal/HeaderModifier.scala b/zio-http/shared/src/main/scala/zio/http/internal/HeaderModifier.scala
@@ -32,7 +32,11 @@ import zio.http._
  */
 trait HeaderModifier[+A] { self =>
   final def addHeader(header: Header): A =
-    addHeaders(Headers(header))
+    if (header.headerName == Header.XFrameOptions.name) {
+      updateHeaders(headers => Headers(headers.filterNot(_.headerName == Header.XFrameOptions.name)) ++ Headers(header))
+    } else {
+      addHeaders(Headers(header))
+    }
 
   final def addHeader(name: CharSequence, value: CharSequence): A =
     addHeaders(Headers.apply(name, value))