Citrix Systems 9.2 manual Summary Examples of Advanced Expressions and Policies

APPENDIX B

Summary Examples of Advanced Expressions and Policies

The following table provides examples of advanced expressions that you can use as the basis for your own advanced expressions.

Examples of Advanced Expressions

Expression Type	Sample Expressions
Look at the method used in the	http.req.method.eq(post)
HTTP request.	http.req.method.eq(get)
Check the Cache-Control or Pragma	http.req.header("Cache-Control").cont
header value in an HTTP request	ains("no-store")
(req) or response (res).	http.req.header("Cache-Control").cont
	ains("no-cache")
	http.req.header("Pragma").contains("n
	o-cache")
	http.res.header("Cache-Control").cont
	ains("private")
	http.res.header("Cache-Control").cont
	ains("public")
	http.res.header("Cache-Control").cont
	ains("must-revalidate")
	http.res.header("Cache-Control").cont
	ains("proxy-revalidate")
	http.res.header("Cache-Control").cont
	ains("max-age")
Check for the presence of a header	http.req.header("myHeader").exists
in a request (req) or response	http.res.header("myHeader").exists
(res).