1 files changed, 10 insertions, 0 deletions
diff --git a/libgo/go/net/http/header.go b/libgo/go/net/http/header.go
index d847b131184..049f32f27dc 100644
--- a/libgo/go/net/http/header.go
+++ b/libgo/go/net/http/header.go
@@ -211,3 +211,13 @@ func hasToken(v, token string) bool {
 func isTokenBoundary(b byte) bool {
 	return b == ' ' || b == ',' || b == '\t'
 }
+
+func cloneHeader(h Header) Header {
+	h2 := make(Header, len(h))
+	for k, vv := range h {
+		vv2 := make([]string, len(vv))
+		copy(vv2, vv)
+		h2[k] = vv2
+	}
+	return h2
+}