Blue Coat Systems Time Clock Proxy SG Manuale Utente

ProxySG Content Policy Language Guide

140

•

.suffix

—Test if the 

 pattern is a suffix of the URL or component. The suffix need not 

match on a boundary (such as a domain component or path directory) within a URL component.

.prefix

,

.regex

, 

.substring

, and

.suffix

 are string comparisons that do not require a 

match on component boundaries. For this reason, 

url.host.suffix=

 differs from the host 

comparison used in 

url.domain=

 tests, which does require component level matches.

The URL component modifiers are:

•

.address

—Tests if the host IP address of the requested URL matches the specified IP address, IP 

subnet, or subnet definition. If necessary, a DNS lookup is performed on the host name. DNS 
lookups can be globally restricted by a 

restrict

 DNS definition.

 

The patterns supported by the url.address= test are:

❐

—Host IP address or subnet; for example, 

10.1.198.0.

 

❐

—A subnet mask; for example, 

10.1.198.0/24

.

❐

—Label of a subnet definition block that binds a number of IP addresses or 

subnets.

The 

.address

 modifier is primarily useful when the expression uses either a 

 or a 

. If a literal 

 is used, then the 

url.address=

 condition is equivalent to 

url.host=

.

•

.host

—Tests the host component of the requested URL against the IP address or domain name 

specified by the 

 pattern. The pattern cannot include a forward slash (

/

) or colon (

:

). It does 

not recognize wild cards or suffix matching. Matches are case-insensitive. The default test type is 

.exact

.

url.host.exact=

 can be tested using hash techniques rather than string matches, and will 

therefore have significantly better performance than other, string based, versions of the 

url.host=

 tests. .

Since the host component of a request URL can be either an IP address or a domain name, a 
conversion is sometimes necessary to allow a comparison.

❐

If the expression uses a domain name and the host component of the request URL is an IP 
address, then the IP address is converted to a domain name by doing a reverse DNS lookup.

❐

If the expression uses an IP address and the host component of the request URL is a domain 
name, then the domain name is converted to an IP address by doing a DNS lookup. 

The 

.host

 component supports additional test modifiers:

❐

.is_numeric

—This is true if the URL host was specified as an IP address. For some types of 

transactions (for example, transparent requests on a non-accelerated port), this condition will 
always be true. 

❐

.no_name

—This is true if no domain name can be found for the URL host. Specifically, it is 

true if the URL host was specified as an IP address, and a reverse DNS lookup on this IP 
address fails, either because it returns no name or a network error occurs. 

•

.path

—Tests the path component of the request URL. By default, the pattern is tested as a prefix 

of the complete path component of the requested URL, as well as any query component. The path 
and query components of a URL consist of all text from the first forward slash (

/

) that follows the 

host or port, to the end of the URL, not including any fragment identifier. The leading forward