Loading embedded content from SWF files imported into a security domain
Flash Player 9 and later, Adobe AIR 1.0 and
later
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When you load a SWF file, you can set
the
context
parameter of the
load()
method
of the Loader object that is used to load the file. This parameter
takes a LoaderContext object. When you set the
securityDomain
property
of this LoaderContext object to
Security.currentDomain
,
Flash Player checks for a URL policy file on the server of the loaded
SWF file. If there is a policy file, and it grants access to the
domain of the loading SWF file, you can load the SWF file as imported
media. In this way, the loading file can get access to objects in
the library of the SWF file.
An alternative way for a
SWF file to access classes in loaded SWF files from a different
security sandbox is to have the loaded SWF file call the
Security.allowDomain()
method
to grant access to the domain of the calling SWF file. You can add
the call to the
Security.allowDomain()
method to
the constructor method of the main class of the loaded SWF file,
and then have the loading SWF file add an event listener to respond
to the
init
event dispatched by the
contentLoaderInfo
property
of the Loader object. When this event is dispatched, the loaded
SWF file has called the
Security.allowDomain()
method
in the constructor method, and classes in the loaded SWF file are
available to the loading SWF file. The loading SWF file can retrieve
classes from the loaded SWF file by calling
Loader.contentLoaderInfo.applicationDomain.getDefinition()
or
Loader.contentLoaderInfo.applicationDomain.getQualifiedDefinitionNames()(Flash
Player 11.3 and higher; AIR 3.3 and higher).
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