可能重复：
XmlHttpRequest 错误：Access-Control-Allow-Origin 不允许 Origin null
我正在开发在浏览器中运行良好的天气应用程序。但是，当我尝试在我的 android 手机中进行部署时，它无法正常工作并且会抛出错误。XML 响应为空。请帮我。
<html>
<head>
<title>Calling Web Service from jQuery</title>
<script type="text/javascript" charset="utf-8" src="cordova-2.2.0.js"></script>
<script type='text/javascript' src='xmlObject.js'></script>
<script type='text/javascript' src='jquery-1.8.2.min.js'></script>
<script type="text/javascript" src="json2.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#btnCallWebService").click(function (event) {
alert('click' + $("#cityName").val());
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST", "http://www.webservicex.net/globalweather.asmx?op=GetWeather",true);
xmlhttp.onreadystatechange = function ()
{
if (xmlhttp.readyState == 4)
{
var myXML=xmlhttp.responseXML;
alert("Response XML in getWeatherInformation : ");
alert(myXML);
var json = XMLObjectifier.xmlToJSON(xmlhttp.responseXML);
var body=JSON.stringify(json.Body[0]);
var result = json.Body[0].GetWeatherResponse[0].GetWeatherResult[0].Text;
var myXML2=XMLObjectifier.textToXML(result);
var json2 = XMLObjectifier.xmlToJSON(myXML2);
var body2=json2;
var location=body2.Location[0].Text;
var time=body2.Time[0].Text;
var temperature=body2.Temperature[0].Text;
var pressure=body2.Pressure[0].Text;
alert("location"+location+"..."+time+".."+temperature+".."+pressure);
}
}
xmlhttp.setRequestHeader("Content-Type", "text/xml");
var xml ='<?xml version="1.0" encoding="utf-8"?>'+
'<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">'+
'<soap:Body>'+
'<GetWeather xmlns="http://www.webserviceX.NET">'+
'<CityName>'+ $("#cityName").val() +'</CityName>'+
'<CountryName>India</CountryName>'+
'</GetWeather>'+
'</soap:Body>'+
'</soap:Envelope>';
alert("Request XML : ");
alert(xml);
xmlhttp.send(xml);
});
});
function processSuccess(data, status, req, xml, xmlHttpRequest, responseXML) {
alert('success' + status + ">>" +typeof $(req.responseXML));
var myObj = new Array();
$(req.responseXML)
.find('GetWeatherResult')
.each(function(){
alert($(this));
myObj.push($(this));
});
$(myObj).each(function(){
var x = $(this).find('Location').text();
alert('loc'+ x + $(this).find('Location'));
var p = $(this).find('Location');
for (var key in p) {
alert(key + " -> " + p[key]);
}
});
}
function processError(data, status, req) {
alert(req.responseText + " " + status);
console.log(data);
console.log(status);
console.log(req);
}
</script>
</head>
<body>
<h3>
Weather Report
</h3>
Enter your city name:
<input id="cityName" type="text" />
<input id="btnCallWebService" value="GetInformation" type="button" />
</body>
</html>