Citrix Systems Network Router 9.2 User Manual

text.REGEX_MATCH(regular 

expression)

Returns TRUE if the target matches a regular 
expression argument of up to 1499 characters.

The regular expression must be of the following 
format: 

re<delimiter>regular expression< 

delimiter>

Both delimiters must be the same. Additionally, the 
regular expression must conform to the Perl-
compatible (PCRE) regular expression library 
syntax. For more information, go to http://
www.pcre.org/pcre.txt. In particular, see the 
pcrepattern man page. However, make note of the 
following:

• Back-references are not allowed.
• Recursive regular expressions are not 

recommended. 

• The dot metacharacter also matches new lines.
• The Unicode character set is not supported.
• SET_TEXT_MODE(IGNORECASE) 

overrides the “(?i)” internal option specified in 
the regular expression. 

The 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 ab and aB:

http.req.url.regex_match(re/a(?i)b/) 

The following example matches ab, aB, Ab and 
AB:

http.req.url.set_text_

mode(ignorecase).regex_match(re/ab/) 

The following example performs a case-
insensitive, multiline match where the dot meta-
character also matches a new line:

http.req.body.regex_match(re/(?ixm) 

(^ab (.*) cd$) /)