Citrix Systems 9.2 The following table describes various typecasting operations.

170 Citrix NetScaler Policy Configuration and Reference Guide
The following table describes various typecasting operations.
Typecasting Operations
Operation Description
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.