Session

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4D v20.6

Session


Session -> Function result

Parameter	Type	Description
Function result	Object	Session object

Description

The Session command returns the Session object corresponding to the current scalable user web session.

This command only works when scalable sessions are enabled (see ). It returns Null when sessions are disabled or when legacy sessions are used.

When scalable sessions are enabled, the Session object is available from any web processes in the following contexts:

On Web Authentication database method, On Web Connection database method, and On REST Authentication database method,
ORDA Data Model Class functions called with REST requests,
code processed through 4D tags in Semi-dynamic pages (4DTEXT, 4DHTML, 4DEVAL, 4DSCRIPT/, 4DCODE),
project methods with the "Available through 4D tags and URLs (4DACTION...)" attribute and called through 4DACTION/ urls (see URLs and Form Actions).

The returned Session object has properties and functions that can be used to handle user sessions. They are detailed in the Session API section on developer.4d.com.

Example

You have defined the action_Session project method with attribute "Available through 4D tags and URLs". You call the method by entering the following URL in your browser:

IP:port/4DACTION/action_Session

  //action_Session method

 Case of

    :(Session#Null)

       If(Session.hasPrivilege("WebAdmin")) //calling the hasPrivilege function

          WEB SEND TEXT("4DACTION --> Session is WebAdmin")

       Else

          WEB SEND TEXT("4DACTION --> Session is not WebAdmin")

       End if

    Else

       WEB SEND TEXT("4DACTION --> Session is null")

 End case