Citrix Systems Network Router 9.2 User Manual

You can extract a subset of a larger string using one of the operations in the 
following table.

text.SUFFIX(character, 

count)

Selects the longest suffix in the target that has at 
most count occurrences of character.

For example, consider the following response 
body:

JLEwx

The following expression returns a value of 
“JLEwx”:

http.res.body(100).suffix('L',1) 

The following expression returns “LLEwx”:

http.res.body(100).suffix('L',2) 

text.SUBSTR(starting_

offset, length)

Select a string with length number of characters 
from the target object. Begin extracting the string 
after the starting_offset. If the number of 
characters after the offset are fewer than the value 
of the length argument, select all the remaining 
characters.

text.SKIP(character, count)

Select a string from the target after skipping over 
the longest prefix that has at most count 
occurrences of character.

text.BEFORE_

STR("string")

Returns the text that precedes the first occurrence of string. 

If there is no match for string, the expression returns a text 
object of 0 length.

Following is an example:

http.res.body(1024).after_str("start_

string").before_str("end_string").

contains("https")

text.AFTER_

STR("string")

Returns the text that follows the first occurrence of string. 

If there is no match for string, the expression returns a text 
object of 0 length. 

Following is an example:

http.res.body(1024).after_str("start_
string").before_str("end_string").
contains("https")