Citrix Systems Network Router 9.2 User Manual

The following table describes various typecasting operations.
Typecasting Operations

text.TYPECAST_LIST_

T(separator)

Treats the text in an HTTP request or response body as a list 
whose elements are delimited by the character in the 
separator argument. 

Text mode settings have no effect on the separator. For 
example, even if you set the text mode to IGNORECASE, 
and the separator is the letter “p,” an uppercase “P” is not 
treated as a separator.

The following example creates a Rewrite action that 
constructs a list from an HTTP request body and extracts the 
fourth item in the list:

add rewrite action myreplace_action REPLACE 

'http.req.body(100)' 

'http.req.body(100).typecast_list_

t('?').get(4)' 

set rewrite policy myreplace_policy -action 

myreplace_action 

This policy returns the string “fourth item” from the 
following request:

GET?first item?second item?third item?fourth 

item?

The following example extracts the fourth item from the last 
from the list. 

add rewrite action myreplace_action1 REPLACE 

'http.req.body(100)' 

'http.req.body(100).typecast_list_

t('?').get_reverse(4)' 

set rewrite policy myreplace_policy1 -action 

myreplace_action1 

This policy returns the string “first item” from the following 
request:

GET?first item?second item?third item?fourth 

item

Note that the GET_REVERSE operations ignores empty 
elements in a list.