SequenceHandler
Processes a request through a sequence of handlers and post conditions, as follows:
-
A request is treated by
handler1, and thenpostcondition1is evaluated. -
If
postcondition1is true, the request is then treated byhandler2, and so on.
{
"handler": handler1,
"postcondition": expression1
},
{
"handler": handler2,
"postcondition": expression2
},
...Use this handler for multi-request processing, such as retrieving a form, extracting form content (for example, a nonce), and then submitting it in a subsequent request.
Usage
{
"name": string,
"type": "SequenceHandler",
"config": {
"bindings": [
{
"handler": Handler reference,
"postcondition": runtime expression<boolean>
}
]
}
}Properties
"bindings": array of objects, required-
A list of handler and postcondition bindings.
"handler": Handler reference, required-
The handler to dispatch the request to when it is the first handler in the bindings, or for subsequent handlers when their previous
postconditionyieldstrue.Provide the name of a handler heap object, or an inline handler configuration object.
"postcondition": runtime expression<boolean>, optional-
A flag to indicate that a post condition is met:
-
true: The request is dispatched to the next handler inbindings. -
false: The sequence stops.
Postconditions are defined using IG expressions, as described in Expressions.
Default:
${true} -