`MessengerExtensions.getContext()`

Messenger Extensions SDK

This method is a part of the Messenger Extensions SDK. For information on including the SDK in your site, see Add Messenger Extensions SDK.

Availability
To check for its availability on a given client, call getSupportedFeatures() and check for the context property in the response.

The getContext() method retrieves additional information about the person and the thread that opened the webview within Messenger. It is useful for creating interactive group experiences and games, as well as restricting any content that was intended to be shared only to a certain thread.

Method

MessengerExtensions.getContext(app_id, success, error)

Example

MessengerExtensions.getContext('YOUR_APP_ID', 
  function success(thread_context){
    // success
  },
  function error(err){
    // error
  }
);

Parameters

Parameter	Type	Description
`app_id`	String	Your app ID.
`success`	Function	Success callback function. Receives the thread context object as an argument.
`error`	Function	Error callback function. Called if Messenger was unable to retrieve the thread context.

`thread_context` Object

The thread_context object is passed to the success callback.

{
  "thread_type": "GROUP",
  "tid": "1411911565550430",
  "psid": "1293479104029354",
  "signed_request": "5f8i9XXH2hEaykXHKFvu-E5Nr6QRqN002JO7yl-w_9o.eyJhbGdvcml0aG0iOiJITUFDLVNIQTI1NiIsImlzc3VlZF9hdCI6MTUwNDA0NjM4MCwicGFnZV9pZCI6NjgyNDk4MTcxOTQzMTY1LCJwc2lkIjoiMTI1NDQ1OTE1NDY4MjkxOSIsInRocmVhZF90eXBlIjoiVVNFUl9UT19QQUdFIiwidGlkIjoiMTI1NDQ1OTE1NDY4MjkxOSJ9"
}

Properties

Property	Type	Description
`tid`	String	The ID of the thread the webview was opened from.
`thread_type`	String	The type of thread the webview was openeed from. The possible types are: `USER_TO_PAGE`: A conversation between a user and a page. `USER_TO_USER`: A conversation between two users. `GROUP`: A conversation between multiple users. Number of participants for such conversations can change from 1 to maximum supported by Messenger group capabilities.
`psid`	String	The page-scoped user ID for the person that opened the webview.
`signed_request`	String	A signed request containing the above information. Used to verify the authenticity of the thread context source. For more information, see Validating `signed_request`.

MessengerExtensions.getContext()