Citrix Systems Network Router 9.2 Benutzerhandbuch

str + str 

Concatenates the value of the expression on the left of the operator with the 
value on the right. Following is an example:

http.req.hostname + http.req.url.protocol

str + num 

Concatenates the value of the expression on the left of the operator with a 
numeric value on the right. Following is an example:

http.req.hostname + http.req.url.content_length

num + str

Concatenates the numeric value of the expression on the left side of the 
operator with a string value on the right. Following is an example:

http.req.url.content_length + http.req.url.hostname 

str + ip 

Concatenates the string value of the expression on the left side of the 
operator with an IP address value on the right. Following is an example:

http.req.hostname + 10.00.000.00

ip + str 

Concatenates the IP address value of the expression on the left of the 
operator with a string value on the right.Following is an example:

client.ip.dst + http.req.url.hostname 

str1 ALT 
str2

Uses the string1 or string2 value that is derived from the expression on 
either side of the operator, as long as neither of these expressions is a 
compound expressions.Following is an example:

http.req.hostname alt client.ip.src

str == str

Evaluates whether the strings on either side of the operator are the same. 
Following is an example:

http.req.header("myheader") == 

http.res.header("myheader")

str <= str

Evaluates whether the string on the left side of the operator is the same as 
the string on the right, or precedes it alphabetically.

str >= str

Evaluates whether the string on the left side of the operator is the same as 
the string on the right, or follows it alphabetically.

str < str

Evaluates whether the string on the left side of the operator precedes the 
string on the right alphabetically.

str > str

Evaluates whether the string on the left side of the operator follows the 
string on the right alphabetically.

str !!= str

Evaluates whether the strings on either side of the operator are different.