Use vanilla HTTP handlers (refactoring)

http/response/xml/xml.go

@@ -0,0 +1,23 @@
+// Copyright 2018 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package xml
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// OK sends a XML document.
+func OK(w http.ResponseWriter, data string) {
+	w.Header().Set("Content-Type", "text/xml")
+	w.Write([]byte(data))
+}
+
+// Attachment forces the download of a XML document.
+func Attachment(w http.ResponseWriter, filename, data string) {
+	w.Header().Set("Content-Type", "text/xml")
+	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s", filename))
+	w.Write([]byte(data))
+}