TerraFly API 8.5 Document | Reference | Classes | TDownloadRequest

TDownLoadRequest

(TDownLoadRequest.TDownLoadRequest Method)

Creates a TDowndloadRequest object. It retrieves the resource from then given URL and calls the onload function with the w3c http request object as first argument (see http://www.w3.org/TR/XMLHttpRequest/), and the HTTP response status code as the second (see http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html). 
public TDownLoadRequest(urlToDownload:String,onLoadedCallbackFunction:Object):Void

Parameters

  • urlToDownload : String - Specify the url loaction where the resource from.
  • onLoadedCallbackFunction : Object - This onload function will be called with the w3c http request object specified by the url parameter.

    • Returns

  • Void

    • Example

    The following example creates a TDownloadRequest object in order to retrive a list of markers from a .xml file. 
    <div id="mapContainer"  style="width: 640px; height: 400px;"></div>
<script type="text/javascript">
    var map0 = new TMap(mapContainer, 25.7590256665386, -80.3738769902151, 15, mapInit, 1, true, "", "hybrid");
    downloadObj = new TDownloadRequest("http://maps.cs.fiu.edu/API_doc_stage/Terrafly_API_Prod/markers.xml", OnDataLoaded);
    function OnDataLoaded( http_request, status )
        { 
            if (http_request.status == 200){
                var xmldoc = http_request.responseXML;
                var doc = http_request.responseText;
                var markers = xmldoc.documentElement.getElementsByTagName("marker");
                if ( markers == null ){
                    return;
                }
                for (var i = 0; i < markers.length; i++) {
                    var latValue=parseFloat(markers[i].getAttribute("lat"));
                    var lonValue=parseFloat(markers[i].getAttribute("lng"));
                    var label=String(markers[i].getAttribute("label"));
                    var description=String(markers[i].getAttribute("description"));
                    marker[i] = layer0.AddMarker(latValue, lonValue,label);
                }
            }
            else if( http_request.status != 0)
            {
                alert("server is current busy or the number of results exceeds 3,000 in this area." + "\n Request to server Error code:" + status );
            }
            downloadObj = null;
        }   


</script>

    Another Example

  • Using TDownloadRequest() function