diff options
| -rw-r--r-- | src/net/http/header.go | 6 | ||||
| -rw-r--r-- | src/net/http/header_test.go | 5 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/net/http/header.go b/src/net/http/header.go index 4c72dcb2c88..ef4ee7ffa81 100644 --- a/src/net/http/header.go +++ b/src/net/http/header.go @@ -101,6 +101,12 @@ func (h Header) Clone() Header { sv := make([]string, nv) // shared backing array for headers' values h2 := make(Header, len(h)) for k, vv := range h { + if vv == nil { + // Preserve nil values. ReverseProxy distinguishes + // between nil and zero-length header values. + h2[k] = nil + continue + } n := copy(sv, vv) h2[k] = sv[:n:n] sv = sv[n:] diff --git a/src/net/http/header_test.go b/src/net/http/header_test.go index 47893629194..80c003551db 100644 --- a/src/net/http/header_test.go +++ b/src/net/http/header_test.go @@ -235,6 +235,11 @@ func TestCloneOrMakeHeader(t *testing.T) { in: Header{"foo": {"bar"}}, want: Header{"foo": {"bar"}}, }, + { + name: "nil value", + in: Header{"foo": nil}, + want: Header{"foo": nil}, + }, } for _, tt := range tests { |