Indicates the number of bytes that have been loaded thus far during the load operation.

Indicates the total number of bytes in the downloaded data. This property contains 0 while the load operation is in progress and is populated when the operation is complete. Also, a missing Content-Length header will result in bytesTotal being indeterminate.

The data received from the load operation. This property is populated only when the load operation is complete. The format of the data depends on the setting of the dataFormat property:

If the dataFormat property is URLLoaderDataFormat.TEXT , the received data is a string containing the text of the loaded file.

If the dataFormat property is URLLoaderDataFormat.BINARY , the received data is a ByteArray object containing the raw binary data.

If the dataFormat property is URLLoaderDataFormat.VARIABLES , the received data is a URLVariables object containing the URL-encoded variables.

See also

Controls whether the downloaded data is received as text ( URLLoaderDataFormat.TEXT ), raw binary data ( URLLoaderDataFormat.BINARY ), or URL-encoded variables ( URLLoaderDataFormat.VARIABLES ).

If the value of the dataFormat property is URLLoaderDataFormat.TEXT , the received data is a string containing the text of the loaded file.

If the value of the dataFormat property is URLLoaderDataFormat.BINARY , the received data is a ByteArray object containing the raw binary data.

If the value of the dataFormat property is URLLoaderDataFormat.VARIABLES , the received data is a URLVariables object containing the URL-encoded variables.

The default value is URLLoaderDataFormat.TEXT.

See also

Creates a URLLoader object.

See also

Closes the load operation in progress. Any load operation in progress is immediately terminated. If no URL is currently being streamed, an invalid stream error is thrown.

Sends and loads data from the specified URL. The data can be received as text, raw binary data, or URL-encoded variables, depending on the value you set for the dataFormat property. Note that the default value of the dataFormat property is text. If you want to send data to the specified URL, you can set the data property in the URLRequest object.

Note: If a file being loaded contains non-ASCII characters (as found in many non-English languages), it is recommended that you save the file with UTF-8 or UTF-16 encoding as opposed to a non-Unicode format like ASCII.

A SWF file in the local-with-filesystem sandbox may not load data from, or provide data to, a resource that is in the network sandbox.

By default, the calling SWF file and the URL you load must be in exactly the same domain. For example, a SWF file at www.adobe.com can load data only from sources that are also at www.adobe.com. To load data from a different domain, place a URL policy file on the server hosting the data.

You cannot connect to commonly reserved ports. For a complete list of blocked ports, see "Restricting Networking APIs" in the security chapter of the Programming ActionScript 3.0 book.

In Flash Player 10 and later, if you use a multipart Content-Type (for example "multipart/form-data") that contains an upload (indicated by a "filename" parameter in a "content-disposition" header within the POST body), the POST operation is subject to the security rules applied to uploads:

• The POST operation must be performed in response to a user-initiated action, such as a mouse click or key press.
• If the POST operation is cross-domain (the POST target is not on the same server as the SWF file that is sending the POST request), the target server must provide a URL policy file that permits cross-domain access.

Also, for any multipart Content-Type, the syntax must be valid (according to the RFC2046 standards). If the syntax appears to be invalid, the POST operation is subject to the security rules applied to uploads.

For more information related to security, see the following:

• The security chapter in the Programming ActionScript 3.0 book and the latest comments on LiveDocs
• The Flash Player Developer Center Topic: Security

Parameters

See also

package {
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.xml.*;
    import flash.events.IOErrorEvent;
  
    public class URLLoader_loadExample extends Sprite {
        private var xmlTextField:TextField = new TextField();
        private var externalXML:XML;    
        private var loader:URLLoader;

        public function URLLoader_loadExample() {
            var request:URLRequest = new URLRequest("xmlFile.xml");

            loader = new URLLoader();
            
            try {
                loader.load(request);
            }
            catch (error:SecurityError)
            {
                trace("A SecurityError has occurred.");
            }

             loader.addEventListener(IOErrorEvent.IO_ERROR, errorHandler);
            loader.addEventListener(Event.COMPLETE, loaderCompleteHandler);

            xmlTextField.x = 10;
            xmlTextField.y = 10;
            xmlTextField.background = true;
            xmlTextField.autoSize = TextFieldAutoSize.LEFT;

            addChild(xmlTextField);
        }

        private function loaderCompleteHandler(event:Event):void {

                try {
                    externalXML = new XML(loader.data);
                    readNodes(externalXML);    
                } catch (e:TypeError) {
                    trace("Could not parse the XML file.");
                }
        }

        private function readNodes(node:XML):void {

                for each (var element:XML in node.elements()) {
                    xmlTextField.appendText(element.attributes()[0] + "\n");

                    readNodes(element);
                }    
        }

        private function errorHandler(e:IOErrorEvent):void {
            xmlTextField.text = "Had problem loading the XML File.";
        }
    }
}

Dispatched after all the received data is decoded and placed in the data property of the URLLoader object. The received data may be accessed once this event has been dispatched.

This event has the following properties:

See also

Dispatched if a call to URLLoader.load() attempts to access data over HTTP and the current Flash Player environment is able to detect and return the status code for the request. (Some browser environments may not be able to provide this information.) Note that the httpStatus event (if any) is sent before (and in addition to) any complete or error event.

This event has the following properties:

See also

Dispatched if a call to URLLoader.load() results in a fatal error that terminates the download.

This event has the following properties:

See also

Dispatched when the download operation commences following a call to the URLLoader.load() method.

This event has the following properties:

See also

Dispatched when data is received as the download operation progresses.

Note that with a URLLoader object, it is not possible to access the data until it has been received completely. So, the progress event only serves as a notification of how far the download has progressed. To access the data before it's entirely downloaded, use a URLStream object.

This event has the following properties:

See also

Dispatched if a call to URLLoader.load() attempts to load data from a server outside the security sandbox. Also dispatched if a call to URLLoader.load() attempts to load a SWZ file and the certificate is invalid or the digest string does not match the component.

This event has the following properties:

See also

Note: To run this example, put a file named urlLoaderExample.txt in the same directory as your SWF file. That file should only contain the following line of text: answer=42&question=unknown

The example code does the following:

1. The constructor function creates a URLLoader instance named loader and a URLRequest instance named request , which contains the location and name of the file to be loaded.
2. The loader object is passed to the configureListeners() method, which adds listeners for each of the supported URLLoader events.
3. The request object is then passed to loader.load() , which loads the text file.
4. When the URLLoader has finished loading the text file the Event.COMPLETE event fires, triggering the completeHandler() method. The completeHandler() method creates a URLVariables object from the text loaded from the file. The URLVariables object converts URL-encoded name/value pairs into ActionScript properties to make it easier to manipulate the loaded data.

package {
    import flash.display.Sprite;
    import flash.events.*;
    import flash.net.*;

    public class URLLoaderExample extends Sprite {
        public function URLLoaderExample() {
            var loader:URLLoader = new URLLoader();
            configureListeners(loader);

            var request:URLRequest = new URLRequest("urlLoaderExample.txt");
            try {
                loader.load(request);
            } catch (error:Error) {
                trace("Unable to load requested document.");
            }
        }

        private function configureListeners(dispatcher:IEventDispatcher):void {
            dispatcher.addEventListener(Event.COMPLETE, completeHandler);
            dispatcher.addEventListener(Event.OPEN, openHandler);
            dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
            dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
            dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler);
            dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
        }

        private function completeHandler(event:Event):void {
            var loader:URLLoader = URLLoader(event.target);
            trace("completeHandler: " + loader.data);
    
            var vars:URLVariables = new URLVariables(loader.data);
            trace("The answer is " + vars.answer);
        }

        private function openHandler(event:Event):void {
            trace("openHandler: " + event);
        }

        private function progressHandler(event:ProgressEvent):void {
            trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
        }

        private function securityErrorHandler(event:SecurityErrorEvent):void {
            trace("securityErrorHandler: " + event);
        }

        private function httpStatusHandler(event:HTTPStatusEvent):void {
            trace("httpStatusHandler: " + event);
        }

        private function ioErrorHandler(event:IOErrorEvent):void {
            trace("ioErrorHandler: " + event);
        }
    }
}