| value | state | description |
|---|---|---|
| 0 | UNSENT | xml telah dibuat namun belum di call open() |
| 1 | OPENED | open() => sudah di open |
| 2 | HEADERS_RECAIVED | send() => sudah di kirim dan statusnya sudah ada |
| 3 | LOADING | downloading, response sedang mendownload (masih proses) |
| 4 | DONE | response / operasinya sudah selesai |