我正在开发一个Web UI,并使用动态的downloadURl方法获取输出和一个php(testing.php)文件,并对其进行进一步处理,该php文件给出了有效的xml文件输出,但是在downloadURl函数中,它给出了responseXML = null错误。 有时,UI可以获取响应XML,但大多数情况下,它返回空值。
这是我的下载URl文件代码
downloadUrl("testing.php", function(data) {
console.log(data);
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var name = markers[i].getAttribute("Chainage");
var address = markers[i].getAttribute("address");
var temperkey = markers[i].getAttribute("temperkey");
var vibration = markers[i].getAttribute("vibration");
var batterystatus = markers[i].getAttribute("batterystatus");
var lt = markers[i].getAttribute("lat");
var lg = markers[i].getAttribute("lng");
var status = markers[i].getAttribute("status");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var html = "<b>"+'Chainage:'+"</b>"+"<b>"+ name + "</b> <br/>"+"<b>"+'LAT:'+"</b>"+"<b>"+ lt + "</b> <br/>"+"<b>"+'LONG:'+"</b>"+"<b>"+ lg + "</b> <br/>"+"<b>"+'EcbNo:'+"</b>"+'<a id="ancid" href="#" onclick="return check()">'+address+'</a>';
var icon = customIcons[status] || {};
var img1='12.png';
if(status==1)
{
img1='13.png';
//var img2='Phonehandset.gif';
}
if(temperkey==1||vibration==1)
{
img1='14.png';
//img1='Phonehandset.gif';
}
if(Number==address)
{
img1='Phonehandset.gif';
clearInterval(myinterval);
}
if(batterystatus==1)
{
img1='11.png';
}
var marker = new google.maps.Marker({
map: map,
position: point,
icon:img1,
shadow: icon.shadow
});
bindInfoWindow(marker, map, infoWindow, html);
}
});
}, 4000);
我的testing.php文件输出如下:
<?xml version="1.0"?>
<ecb_config><marker Chainage="Police Bhavan,Vadodara" address="1005" status="1" lat="22.3016" lng="73.1933" temperkey="0" vibration="0" batterystatus="1"/><marker Chainage="" address="1001" status="1" lat="" lng="" temperkey="0" vibration="0" batterystatus="1"/><marker Chainage="20(Vadora)" address="1006" status="0" lat="18.35452552912664" lng="76.11328125" temperkey="0" vibration="0" batterystatus="0"/><marker Chainage="" address="1003" status="0" lat="" lng="" temperkey="" vibration="0" batterystatus=""/><marker Chainage="" address="1002" status="1" lat="18.5590" lng="73.7868" temperkey="0" vibration="0" batterystatus=""/></ecb_config>
在Google Chrome控制台中,它显示以下错误。
NewPhone.php:4469 Uncaught TypeError: Cannot read property 'documentElement' of null
at NewPhone.php:4469
at XMLHttpRequest.request.onreadystatechange (NewPhone.php:4532)
(anonymous) @ NewPhone.php:4469
request.onreadystatechange @ NewPhone.php:4532
XMLHttpRequest.send (async)
downloadUrl @ NewPhone.php:4536
(anonymous) @ NewPhone.php:4466
答案 0 :(得分:0)
先尝试验证数据
if(xml.documentElement.nodeName!==null)