Citrix Systems 9.2 manual Basic Operations on a Portion of a String, Object of 0 length

Chapter 4 Advanced Expressions: Evaluating Text 89

Operations on Strings Based on a Character Count

Character Count Operation	Description
text.SUFFIX(character,	Selects the longest suffix in the target that has at
count)	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_	Select a string with length number of characters
offset, length)	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.

Operations on a Portion of a String

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

Basic Operations on a Portion of a String

Basic Text Operation	Description
text.BEFORE_	Returns the text that precedes the first occurrence of string.
STR("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_	Returns the text that follows the first occurrence of string.
STR("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")