Question

我必须使用XMLHttpRequest来获取kml文件，因为我无法直接对KML进行更改，并且需要使用自己的单独信息窗绘制多边形，其中包含存储在KML中但不作为描述标记的详细信息或类似的东西所以我不能轻易抓住它。我设法做到这一点，多边形显示和infowindows工作。它是一个相当大的程序，所以我没有在这里显示它，但基本上当我加载我的getKML函数时，它不会在开发环境或当前问题中工作。虽然它可以在我的本地主机上运行良好。

这是我不断收到的错误消息： Uncaught NetworkError：无法在'XMLHttpRequest'上执行'send'：无法加载“https://someURL/polygons_live.kml”。

继承代码，你真的只需要看几行，因为那里使用的是xmlhttprequest，也请原谅我的乱码，还是实习生和重构：

  /** Calls using xmlhttprequest to grab the kml file
  * and later prints it out as one or more polygons
  */
function getKML(kmlUrl) {
var xmlRequest = new XMLHttpRequest();
xmlRequest.open("GET", kmlUrl, false);
xmlRequest.send();
xmlDoc = xmlRequest.responseXML;
var x = xmlDoc.getElementsByTagName("Placemark");
// travels through each Placemark tag in the kml files
var outage_time, restoration_time, event_number_value, fillColour, borderColour;
var objArray = [];

for (var i = 0; i < x.length; i++) {
    // uses momentjs api to create human readable dates
    var date_format = "MMM DD, hh:mm a";
    // gets the event number
    event_number_value = x[i].getElementsByTagName("SimpleData")[2].childNodes[0].nodeValue;
    // gets outage start time
    var outage_time_value = x[i].getElementsByTagName("SimpleData")[3].childNodes[0].nodeValue;
    var outage_time_moment = moment(outage_time_value);
    outage_time = outage_time_moment.format(date_format);
    // gets estimated restoration time
    var restoration_time_value = x[i].getElementsByTagName("SimpleData")[5].childNodes[0].nodeValue;
    // checks to see if we have a restoration time or not
    if (restoration_time_value === "2001-01-01T00:00:00") {
        restoration_time = "Not yet determined";
    } else {
        var restoration_time_moment = moment(restoration_time_value);
        restoration_time = restoration_time_moment.format(date_format);
    }
    // gets the coordinates of the polygon
    var coords = x[i].getElementsByTagName("coordinates")[0].childNodes[0].nodeValue;
    var coordinate = coords.split(",0 ");
    var coordJoined = coordinate.join();
    var coordAgain = coordJoined.split(",");
    // gets the colour of the polygon
    var colour = x[i].getElementsByTagName("styleUrl")[0].childNodes[0].nodeValue;
    // determines the colour out of yellow, orange and red
    if (colour === "#Style1") {
        fillColour = '#f1c40f';
        borderColour = '#f1c40f';
    } else if (colour === "#Style2") {
        fillColour = '#e67e22';
        borderColour = '#e67e22';
    } else {
        fillColour = '#c0392b';
        borderColour = '#c0392b';
    }

    // creates objects and adds it to array to be later used as data
    var obj = {
        eventID : event_number_value,
        offTime : outage_time,
        restoreTime : restoration_time,
        fill : fillColour,
        borderCol : borderColour
    };
    objArray.push(obj);

    // create a LatLng array out of the coordinate string
    var polygonCoords = new Array();
    var j = 0;
    var z = j + 1;
    //var firstCoord = new google.maps.LatLng();
    while (z < coordAgain.length) {
        // adds the first and last latLng to the array of polygonCoords
        if ((j % 2) == 0) {
            var co1 = parseFloat(coordAgain[z]);
            var co2 = parseFloat(coordAgain[j]);
            var newLatLng = new google.maps.LatLng(co1, co2);
            polygonCoords.push(newLatLng);
        } else {
            var co1 = parseFloat(coordAgain[j]);
            var co2 = parseFloat(coordAgain[z]);
            var newLatLng = new google.maps.LatLng(co1, co2);
            polygonCoords.push(newLatLng);
        }
        j++;
        z++;
    }
    //removes last coordinate as its useless as its not a number
    polygonCoords.pop();

    /** Adds the polygon to a polygon array
     * and maps it onto the map
     */
    var newPoly = new google.maps.Polygon({
        paths : polygonCoords,
        strokeColor : objArray[i].borderCol,
        strokeOpacity : 0.35,
        strokeWeight : 2,
        fillColor : objArray[i].fill,
        fillOpacity : 0.35
    })
    newPoly.setMap(map);
    newPoly.set("eventNum", objArray[i].eventID);
    newPoly.set("offTime", objArray[i].offTime);
    newPoly.set("resTime", objArray[i].restoreTime);

    google.maps.event.addListener(newPoly, 'click',
            attachInfoWindow(newPoly));
    polyArray.push(newPoly);
}
}

更新1：我实际上在以后的控制台中出现此错误： XMLHttpRequest无法加载https://someurl/polygons_live.kml。请求的资源上不存在“Access-Control-Allow-Origin”标头。因此，不允许原点“https://someurl”访问。

Answer 1

这是一个跨域请求问题，我将开始使用相对地址指向抓取我的kml。

它解决了我的问题。

使用XMLHttpRequest加载KML谷歌地图，无法加载KML

1 个答案: