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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The MediaKeySession
interface of the EncryptedMediaExtensions API represents a context for message exchange with a content decryption module (CDM).
Properties
MediaKeySession.closed
Read only- Returns a
Promise
signaling when aMediaKeySession
closes. This promise can only be fulfilled and is never rejected. Closing a session means that licenses and keys associated with it are no longer valid for decrypting media data. MediaKeySession.expiration
Read only- The time after which the keys in the current session can no longer be used to decrypt media data, or
NaN
if no such time exists. This value is determined by the CDM and measured in milliseconds since January 1, 1970, UTC. This value may change during a session lifetime, such as when an action triggers the start of a window. MediaKeySession.keyStatuses
Read only- Contains a reference to a read-only
MediaKeyStatusMap
of the current session's keys and their statuses. MediaKeySession.sessionId
Read only- Contains a unique string generated by the CDM for the current media object and its associated keys or licenses.
Event handlers
MediaKeySession.onkeystatuseschange
- Sets the
EventHandler
called when there has been a change in the keys in a session or their statuses. MediaKeySession.onmessage
- Sets the
EventHandler
called when the content decryption module has generated a message for the session.
Methods
MediaKeySession.close()
-
Returns a
Promise
after notifying the current media session is no longer needed and that the CDM should release any resources associated with this object and close it. MediaKeySession.generateRequest()
- Returns a
Promise
after generating a media request based on initialization data. MediaKeySession.load()
- Returns a
Promise
that resolves to a boolean value after loading data for a specified session object. MediaKeySession.remove()
- Returns a
Promise
after removing any session data associated with the current object. MediaKeySession.update()
- Returns a
Promise
after loading messages and licenses to the CDM.
Examples
// TBD
Specifications
Specification | Status | Comment |
---|---|---|
Encrypted Media Extensions The definition of 'MediaKeySession' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 42.0 | (Yes) | ? | ? | (Yes) | ? |
onkeystatuseschange and onmessage |
55.0 | ? | ? | ? | 42 | ? |
Feature | Android | Android Webview | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|---|
Basic support | No support | 43.0 | (Yes) | ? | ? | ? | (Yes) | ? | 42.0 |
onkeystatuseschange and onmessage |
No support | 55.0 | ? | ? | ? | ? | 42 | ? | 55.0 |