class Lib

Cancels a specified setInterval() call.

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Cancels a specified setTimeout() call.

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Returns a reference to the class object of the class specified by the name parameter.

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Returns the fully qualified class name of an object.

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Returns the fully qualified class name of the base class of the object specified by the value parameter. This function provides a quicker way of retrieving the base class name than describeType(), but also doesn't provide all the information describeType() does.

After you retrieve the name of a class with this function, you can convert the class name to a class reference with the getDefinitionByName() function.

Note: This function restricts itself to instance hierarchies, whereas the describeType() function uses class object hierarchies if the value parameter is a data type. Calling describeType() on a data type returns the superclass based on the class object hierarchy, in which all class objects inherit from Class. The getQualifiedSuperclassName() function, however, ignores the class object hierarchy and returns the superclass based on the more familiar instance hierarchy. For example, calling getQualifiedSuperclassName(String) returns Object although technically the String class object inherits from Class. In other words, the results are the same whether you use an instance of a type or the type itself.

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Used to compute relative time. For a Flash runtime processing ActionScript 3.0, this method returns the number of milliseconds that have elapsed since the Flash runtime virtual machine for ActionScript 3.0 (AVM2) started. For a Flash runtime processing ActionScript 2.0, this method returns the number of milliseconds since the Flash runtime began initialization. Flash runtimes use two virtual machines to process ActionScript. AVM1 is the ActionScript virtual machine used to run ActionScript 1.0 and 2.0. AVM2 is the ActionScript virtual machine used to run ActionScript 3.0. The getTimer() method behavior for AVM1 is different than the behavior for AVM2.

For a calendar date (timestamp), see the Date object.

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Opens or replaces a window in the application that contains the Flash Player container (usually a browser). In Adobe AIR, the function opens a URL in the default system web browser

Important Security Note

Developers often pass URL values to the navigateToURL() function that were obtained from external sources such as FlashVars. Attackers may try to manipulate these external sources to perform attacks such as cross-site scripting. Therefore, developers should validate all URLs before passing them to this function.

Good data validation for URLs can mean different things depending on the usage of the URL within the overall application. The most common data validation techniques include validating that the URL is of the appropriate scheme. For instance, unintentionally allowing javascript: URLs may result in cross-site scripting. Validating that the URL is a within your domain can ensure that the SWF file can't be used as an open-redirector by people who conduct phishing attacks. For additional security, you may also choose to validate the path of the URL and to validate that the URL conforms to the RFC guidelines

For example, the following code shows a simple example of performing data validation by denying any URL that does not begin with http:// or https:// and validating that the URL is within your domain name. This example may not be appropriate for all web applications and you should consider whether additional checks against the URL are necessary.

// AS3 Regular expression pattern match for URLs that start with http:// and https:// plus your domain name.
function checkProtocol (flashVarURL:String):Boolean {
	// Get the domain name for the SWF if it is not known at compile time.
	// If the domain is known at compile time, then the following two lines can be replaced with a hard coded string.
	var my_lc:LocalConnection = new LocalConnection();
	var domainName:String = my_lc.domain;
	// Build the RegEx to test the URL.
	// This RegEx assumes that there is at least one "/" after the
	// domain. http://www.mysite.com will not match.
	var pattern:RegExp = new RegExp("^http[s]?\:\\/\\/([^\\/]+)\\/");
	var result:Object = pattern.exec(flashVarURL);
	if (result == null || result[1] != domainName || flashVarURL.length >= 4096) {
	return (false);
	}
	return (true);
}

For local content running in a browser, calls to the navigateToURL() method that specify a "javascript:" pseudo-protocol (via a URLRequest object passed as the first parameter) are only permitted if the SWF file and the containing web page (if there is one) are in the local-trusted security sandbox. Some browsers do not support using the javascript protocol with the navigateToURL() method. Instead, consider using the call() method of the ExternalInterface API to invoke JavaScript methods within the enclosing HTML page.

In Flash Player, and in non-application sandboxes in Adobe AIR, you cannot connect to commonly reserved ports. For a complete list of blocked ports, see "Restricting Networking APIs" in the ActionScript 3.0 Developer's Guide.

In Flash Player 10 and later running in a browser, using this method programmatically to open a pop-up window may not be successful. Various browsers (and browser configurations) may block pop-up windows at any time; it is not possible to guarantee any pop-up window will appear. However, for the best chance of success, use this method to open a pop-up window only in code that executes as a direct result of a user action (for example, in an event handler for a mouse click or key-press event.)

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.

In AIR, on mobile platforms, the sms: and tel: URI schemes are supported. On Android, vipaccess:, connectpro:, and market: URI schemes are supported. The URL syntax is subject to the platform conventions. For example, on Android, the URI scheme must be lower case. When you navigate to a URL using one of these schemes, the runtime opens the URL in the default application for handling the scheme. Thus, navigating to tel:+5555555555 opens the phone dialer with the specified number already entered. A separate application or utility, such as a phone dialer must be available to process the URL.

The following code shows how you can invoke the VIP Access and Connect Pro applications on Android:

//Invoke the VIP Access Application.
navigateToURL(new URLRequest("vipaccess://com.verisign.mvip.main?action=securitycode"));

//Invoke the Connect Pro Application.
navigateToURL(new URLRequest("connectpro://"));

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Sends a URL request to a server, but ignores any response.

To examine the server response, use the URLLoader.load() method instead.

You cannot connect to commonly reserved ports. For a complete list of blocked ports, see "Restricting Networking APIs" in the ActionScript 3.0 Developer's Guide.

You can prevent a SWF file from using this method by setting the allowNetworking parameter of the the object and embed tags in the HTML page that contains the SWF content.

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 Flash Player Developer Center Topic: Security.

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Runs a function at a specified interval (in milliseconds).

Instead of using the setInterval() method, consider creating a Timer object, with the specified interval, using 0 as the repeatCount parameter (which sets the timer to repeat indefinitely).

If you intend to use the clearInterval() method to cancel the setInterval() call, be sure to assign the setInterval() call to a variable (which the clearInterval() function will later reference). If you do not call the clearInterval() function to cancel the setInterval() call, the object containing the set timeout closure function will not be garbage collected.

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Runs a specified function after a specified delay (in milliseconds).

Instead of using this method, consider creating a Timer object, with the specified interval, using 1 as the repeatCount parameter (which sets the timer to run only once).

If you intend to use the clearTimeout() method to cancel the setTimeout() call, be sure to assign the setTimeout() call to a variable (which the clearTimeout() function will later reference). If you do not call the clearTimeout() function to cancel the setTimeout() call, the object containing the set timeout closure function will not be garbage collected.

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