The HTTP Callouts option will be used for configured types of requests, or when criteria are met during policy evaluation. When the criteria matches the type of request, you might want to stall the policy evaluation briefly, retrieve information from a server, and then perform an action depending on the retrieved information. Another option could be that you want to update a database or the content hosted on a web server based on the requests.
An HTTP Callout is an HTTP or HTTPS request that Citrix NetScaler generates and sends to an external resource when the criteria matches during policy evaluation. The information can be analyzed by default syntax policy expressions.
You can use HTTP Callouts to obtain information from external applications. The Callout policy sends an HTTP request to an external application. An agent that you deploy in front of the application formats the request for the application.
The HTTP Callout can be configured for HTTP or HTTPS content switching,...