A working proxy exists.

server/handleValidateJob.go

@@ -0,0 +1,10 @@
+package main
+
+import "ippserver/packages/ipp"
+
+func handleValidateJob(r *ipp.Request) *ipp.Response {
+	response := ipp.NewResponse(ipp.SuccessfulOk, r.RequestID())
+	response.AddOperatonAttribute(ipp.NewCharSetValue("attributes-charset", "utf-8"))
+	response.AddOperatonAttribute(ipp.NewNaturalLanguage("attributes-natural-language", "en"))
+	return response
+}