Behavior of XMLHttpRequest in Qml when the Internet is disconnected (request to localhost)

There is an XMLHttpRequest to a server located at the address localhost: port ( http://127.0.0.1:port/ )

If the get request is successful (correct), the server returns a response in the form:

{ "meta": { "code": <code> }, ... } 

If there is no such command on the server, code = 404.
If successful, code = 200.

1. Accessing the server when the Internet is connected is excellent.
2. Accessing the server when the Internet is turned off is also excellent (the application was launched after the Internet was turned off).
3. If at the start of the application the Internet was present and all requests to the server were excellent, then after the Internet was broken (and physically - the network cable was disconnected, and programmatically - the network interface was disconnected), the requests to the local server ceased.

Code example:

 import QtQuick 2.4 import QtQuick.Window 2.2 Window { id: root visible: true property int it: 0 Timer { id: timer interval: 1000 onTriggered: it++; repeat: true } onItChanged: { if(it>=5) { sendCommand() it = 0 } } function sendCommand() { var request = new XMLHttpRequest(); timer.running = false; request.onreadystatechange = function() { timer.running = true; if (request.readyState === XMLHttpRequest.HEADERS_RECEIVED) { console.debug('HEADERS_RECEIVED'); } else if(request.readyState === XMLHttpRequest.DONE) { var object = JSON.parse(request.responseText.toString()); console.debug('DONE'); console.debug(JSON.stringify(object, null, 2)); } } request.open('GET', 'http://localhost:13112/GetCloseTime', false); request.send(null); } Component.onCompleted: timer.start(); } 

Conclusion in the console to the Internet break:

 qml: HEADERS_RECEIVED qml: DONE qml: { "meta": { "code": 200 }, "task": "None", "time": { "hours": 20, "minutes": 0 } } 

After the break:

 qrc:/main.qml:34: JSON.parse: Parse error 

Has anyone encountered such a problem or is there a way to get around it?