Citrix Systems 9.2 manual Operations for Http Headers, Operations That Evaluate Http Headers

122Citrix NetScaler Policy Configuration and Reference Guide

Prefixes That Extract HTTP Headers

HTTP Header Prefix	Description
HTTP.RES.SET_COOKIE.	Returns the value of Version field of the nth
COOKIE("name", integer).	cookie as a decimal integer.
VERSION	A string of zero length is returned if the Port
or	field or its value is absent.
HTTP.RES.SET_COOKIE2.
COOKIE("name", integer).
VERSION
HTTP.RES.TXID	Returns the HTTP transaction ID. The value
	is a function of an internal transaction
	number, system boot time and system MAC
	address.

Operations for HTTP Headers

The following table describes operations that you can specify with the prefixes for HTTP headers.

Note that if the same operation is also used to evaluate text, the header-based operation always overrides any text-based operation. For example, the AFTER_ STR operation, when applied to a header, overrides text-based AFTER_STR operations for all instances of the current header type.

Operations That Evaluate HTTP Headers

HTTP Header Operation	Description
http header.EXISTS	Returns a Boolean TRUE if an instance of the specified
	header type exists.
	Following is an example:
	http.req.header("Cache-Control").exists