ConditionEnforcementFilter

Verifies that a specified condition is met. If the condition is met, the request continues to be executed. Otherwise, the request is referred to a failure handler, or IG returns 403 Forbidden and the request is stopped.

Usage

{
    "type": "ConditionEnforcementFilter",
    "config": {
        "condition": runtime expression<boolean>,
        "failureHandler": handler reference
    }
}

Properties

"condition": runtime expression<boolean>, required

If the expression evaluates to true, the request continues to be executed.

See also Expressions.

"failureHandler": handler reference, optional

Handler to treat the request if the condition expression evaluates as false.

Provide an inline handler configuration object, or the name of a handler object declared in the heap. See also Handlers.

Default: HTTP 403 Forbidden, the request stops being executed.

Example

The following example tests whether a request contains a session username. If it does, the request continues to be executed. Otherwise, the request is dispatched to the ConditionFailedHandler failure handler. 

{
    "name": "UsernameEnforcementFilter",
    "type": "ConditionEnforcementFilter",
    "config": {
        "condition": "${not empty (session.username)}",
        "failureHandler": "ConditionFailedHandler"
    }
}
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