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Use the DRMManager class to manage vouchers and media rights
server sessions in applications.
Voucher management (AIR only)
Whenever
a user plays protected content, the runtime obtains and caches the license
required to view the content. If the application saves the file
locally, and the license allows offline playback, the user can view
the content in the AIR application. Such local offline playback
succeeds even if a connection to the media rights server is not
available. Using the DRMManager and the NetStream
preloadEmbeddedMetadata()
method,
you can pre-cache the voucher. The application does not have to
obtain the license necessary to view the content. For example, your
application could download the media file and then obtain the voucher
while the user is still online.
To preload a voucher, use
the NetStream
preloadEmbeddedMetadata()
method
to obtain a DRMContentData object. The DRMContentData object contains
the URL and domain of the media rights server that can provide the license
and describes whether user authentication is required. With this
information, you can call the DRMManager
loadVoucher()
method
to obtain and cache the voucher. The workflow for pre-loading vouchers
is described in more detail in
Pre-loading vouchers for offline playback
.
Session management
You can also use the
DRMManager to authenticate the user to a media rights server and
to manage persistent sessions.
Call the DRMManager
authenticate()
method
to establish a session with the media rights server. When authentication
is completed successfully, the DRMManager dispatches a DRMAuthenticationCompleteEvent
object. This object contains a session token. You can save this
token to establish future sessions so that the user does not have
to provide their account credentials. Pass the token to the
setAuthenticationToken()
method
to establish a new authenticated session. (The settings of the server
that generated the token determine the token expiration and other
attributes. AIR application code should not interpret the token
data structure, because the structure may change in future AIR updates.)
Authentication
tokens can be transferred to other computers. To protect tokens, you
can store them in the AIR Encrypted Local Store. See
Encrypted local storage
for more information.
DRMStatus Events
The DRMManager dispatches a DRMStatusEvent object after a call
to the
loadVoucher()
method completes successfully.
If a voucher is obtained, then the
detail
property
(AIR only) of the event object has the value: "DRM.voucherObtained",
and the
voucher
property contains the DRMVoucher
object.
If a voucher is not obtained, then the
detail
property
(AIR only) still has the value: "DRM.voucherObtained"; however,
the
voucher
property is
null
.
A voucher cannot be obtained if, for example, you use the LoadVoucherSetting
of
localOnly
and there is no locally cached voucher.
If the
loadVoucher()
call does not complete
successfully, perhaps because of an authentication or communication
error, then the DRMManager dispatches a DRMErrorEvent or DRMAuthenticationErrorEvent
object instead.
DRMAuthenticationComplete events
The DRMManager dispatches a DRMAuthenticationCompleteEvent object
when a user is successfully authenticated through a call to the
authenticate()
method.
The DRMAuthenticationCompleteEvent object contains a reusable
token that can be used to persist user authentication across application
sessions. Pass this token to DRMManager
setAuthenticationToken()
method
to re-establish the session. (The token creator sets token attributes
such as expiration. Adobe does not provide an API for examining
token attributes.)
DRMAuthenticationError events
The DRMManager dispatches a DRMAuthenticationErrorEvent object
when a user cannot be successfully authenticated through a call
to the
authenticate()
or
setAuthenticationToken()
methods.
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