feat: add Del func for requestHeader (#950)

pkg/protocol/header.go

@@ -1064,6 +1064,12 @@ func (h *RequestHeader) DelBytes(key []byte) {
 	h.del(h.bufKV.key)
 }
 
+// Del deletes header with the given key.
+func (h *RequestHeader) Del(key string) {
+	k := getHeaderKeyBytes(&h.bufKV, key, h.disableNormalizing)
+	h.del(k)
+}
+
 func (h *RequestHeader) SetArgBytes(key, value []byte, noValue bool) {
 	h.h = setArgBytes(h.h, key, value, noValue)
 }

pkg/protocol/header_test.go

@@ -209,6 +209,7 @@ func TestRequestHeaderDel(t *testing.T) {
 	var h RequestHeader
 	h.Set("Foo-Bar", "baz")
 	h.Set("aaa", "bbb")
+	h.Set("ccc", "ddd")
 	h.Set(consts.HeaderConnection, "keep-alive")
 	h.Set(consts.HeaderContentType, "aaa")
 	h.Set(consts.HeaderServer, "aaabbb")
@@ -226,11 +227,16 @@ func TestRequestHeaderDel(t *testing.T) {
 	h.del([]byte("Host"))
 	h.del([]byte(consts.HeaderTrailer))
 	h.DelCookie("foo")
+	h.Del("ccc")
 
 	hv := h.Peek("aaa")
 	if string(hv) != "bbb" {
 		t.Fatalf("unexpected header value: %q. Expecting %q", hv, "bbb")
 	}
+	hv = h.Peek("ccc")
+	if string(hv) != "" {
+		t.Fatalf("unexpected header value: %q. Expecting %q", hv, "")
+	}
 	hv = h.Peek("Foo-Bar")
 	if len(hv) > 0 {
 		t.Fatalf("non-zero header value: %q", hv)