68 Citrix NetScaler Policy Configuration and Reference Guide
HTTP.REQ.HOSTNAME.
DOMAIN Returns the domain name part of the host name. For
example, if the host name is www.myhost.com or www.
myhost.com:8080, the domain is myhost.com.
Returns incorrect results if the host name has an IP
address. For information on expressions for IP
addresses, see “Advanced Expressions: IP and MAC
Addresses, Throughput, VLAN IDs,” on page 149.
All text operations that you specify after this prefix are
case insensitive.
HTTP.REQ.HOSTNAME.
SERVER Returns the server name part of the host name. If the
host name is www.myhost.com or www.myhost.
com:8080, the server is www.myhost.com.
All text operations that you specify after this prefix are
case insensitive.
HTTP.REQ.METHOD Returns the value of the METHOD in an HTTP request,
or matches the method type if you provide it as an
argument, for example, http.req.method.
eq(get). If you enclose the argument in quotes,
evaluation is case-sensitive.
HTTP.REQ.URL Returns the HTTP URL.
HTTP.REQ.URL.HOSTNAME Returns the host name in the HTTP URL.
Do not use this prefix in bidirectional policies.
Note that there are two similar prefixes that return host
names, as follows:
•HTTP.REQ.HOSTNAME returns the host name
from the URL if there is one; otherwise, it returns
the value in the last occurrence of the Host header.
•HTTP.REQ.HEADER("Host") only returns the
value from the Host header. To use this value as a
host name you must typecast this string, as
illustrated in the following example: http.req.
header("host").typecast_http_
hostname_t
For more information on typecasting, see
“Transforming Text and Numbers into Different Data
Types,” on page 169.
HTTP Expression Prefixes that Return Text
Prefix Description