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/****************************************************************************
**
** Copyright (C) 2015 Pelagicore AG
** Contact: http://www.pelagicore.com/
**
** This file is part of Neptune IVI UI.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Neptune IVI UI licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Pelagicore. For licensing terms
** and conditions see http://www.pelagicore.com.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3 requirements will be
** met: http://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
.pragma library
var request = new XMLHttpRequest()
var errorCounter = 0
var errorFunc = 0
//Will be called when the error is not responding after a few tries
function setErrorFunction(func) {
errorFunc = func
}
function serverCall(url, data, dataReadyFunction, xhr) {
var i = 0
for (var key in data)
{
if (i === 0) {
url += "?" + key + "=" + data[key];
} else {
url += "&" + key+ "=" + data[key];
}
i++
}
//when no xhr is defined use the global one and reuse it
if (xhr == undefined) {
xhr = new XMLHttpRequest()
}
console.log("HTTP GET to " + url);
if (xhr.readyState != 0) {
xhr.abort();
}
xhr.open("GET", url);
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
//print(xhr.responseText);
if (xhr.responseText !== "") {
errorCounter = 0
var data = JSON.parse(xhr.responseText);
return dataReadyFunction(data)
} else {
print("JSONBackend: " + xhr.status + xhr.statusText)
errorCounter++
if (errorCounter >= 3 && errorFunc) {
errorFunc()
}
return dataReadyFunction(0)
}
}
}
xhr.send();
}
function abortableServerCall(url, data, dataReadyFunction) {
serverCall(url,data,dataReadyFunction,request)
}
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