More development.

More types.
Fixed attribute groups in requests.
Started on client.
Saving data to file.

packages/ipp/request_test.go

@@ -59,7 +59,7 @@ var testRequest = []byte{0x01, 0x01, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x11,
 func TestUnmarshalRequestPrinterAttributes(T *testing.T) {
 	buf := bytes.NewBuffer(testRequest)
 
-	req := NewRequest()
+	req := NewRequest(GetPrinterAttributes, 17)
 
 	req.UnMarshal(buf)
 	fmt.Print(req)