Citrix Systems 9.2 Text following the string that matches, From the last to the first, Plain

168 Citrix NetScaler Policy Configuration and Reference Guide

Operations That Apply Regular Expressions to Text and HTTP Headers

Regular Expression Operation	Description
http header.AFTER_	Evaluates all instances of the header and extracts
REGEX(regular expression)	the text following the string that matches the
	regular expression argument in any instance of the
	header value. The header instances are matched
	from the last to the first.
	The following example extracts "BBCCDD" from
	"AABBCCDD".
	http.req.header("etag").after_
	regex(re/AA/)
http header.BEFORE_	For any instance of the header, this operation
REGEX(regular expression)	returns the text that precedes the string matching
	the regular expression argument. The header
	instances are evaluated from the last to the first.
	The following example extracts "text" from "text/
	plain":
	http.res.header("content-
	type").before_regex(re#/#)
http header.REGEX_	This operation returns a Boolean TRUE if the
MATCH(regular expression)	regular expression argument matches any instance
	of the header value. The header instances are
	evaluated from the last to the first.
	Following are examples:
	http.req.hostname.regex_match(re/
	[[:alpha:]]+(abc){2,3}/)
	http.req.url.set_text_
	mode(urlencoded).regex_
	match(re#(a*b+c*)#)
	The following example matches the strings “ab”
	and “aB”:
	http.req.url.regex_match(re/a(?i)b/)
	The following example matches the strings “ab”,
	“aB”, “Ab”, and “AB”:
	http.req.url.set_text_
	mode(ignorecase).regex_match(re/ab/)
	The following example performs a case-
	insensitive, multi-line match, where the dot (.)
	meta-character also matches a new line:
	http.req.body.regex_match(re/(?ixm)
	(^ab (.*) cd$) /)