Blocking a Jenkins job until a web service returns an HTTP 200?

Is there a way to block a jenkins job until a given webservice returns HTTP 200 for a given UR开发者_开发百科L? I have a server deployment job with downstream tasks, and it takes a variable length of time to redeploy the application.

I guess I could script something, but an existing plugin or capability would feel like less of a hack.

---

Just write a groovy script to shell out to wget and check the output.