Citrix Systems 9.2 Any instance of the header value, Following returns a Boolean True, Header

Chapter 6 Advanced Expressions: Parsing HTTP, TCP, and UDP Data 123

Operations That Evaluate HTTP Headers

HTTP Header Operation	Description
http header.	Returns a Boolean TRUE if the string argument appears
CONTAINS("string")	in any instance of the header value.
	Note: This operation overrides any text-based Contains
	operations on all instances of the current header type.
	Following is an example of request with two headers:
	HTTP/1.1 200 OK\r\n
	MyHeader: abc\r\n
	Content-Length: 200\r\n
	MyHeader: def\r\n
	\r\n
	The following returns a Boolean TRUE:
	http.res.header("MyHeader").
	contains("de")
	The following returns FALSE. Note that the NetScaler
	does not concatenate the different values.
	http.res.header("MyHeader").
	contains("bcd")
http header.COUNT	Returns the number of headers in a request or response,
	to a maximum of 15 headers of the same type. The
	result is undefined if there are more than 15 instances of
	the header.
	Following is sample data in a request:
	HTTP/1.1 200 OK\r\n
	MyHeader: abc\r\n
	Content-Length: 200\r\n
	MyHeader: def\r\n
	\r\n
	When evaluating the preceding request, the following
	returns a count of 2:
	http.res.header("MyHeader").count