Scriptrunner: Call custom endpoint within post-function script

[Matt]

Hi all, perhaps you can advise me on whether this is a good practice and, if so, how to achieve it: 

+ Rather than having various bits of logic spread out in listeners, post-functions etc, keep all the logic within endpoints

+ Then, in the listener or post-function script, call the endpoint

= More easily manage code since all logic is held in endpoints, and the listeners/post-functions just reference the endpoints.

I'd like to prototype this, but I'm struggling with actually calling an endpoint I've created from within a post-function script. I've searched on the community/google and am getting some mixed signals - anyone done this before? 

The endpoint I've setup is a simple issue redirect - given an issue key it will navigate to that issue in the browser:

<baseUrl>/rest/scriptrunner/latest/custom/issueRedirect?issueKey="ISSUE-01"

Can anyone provide any sample code for calling this within another script? Thanks!