Cisco Cisco Web Security Appliance S160 Guia Do Utilizador

The table describes the different conditional variable formats. 

For example, the following text is some HTML code that uses %R as a conditional variable to check if 
re-authentication is offered, and uses %r as a regular variable to provide the re-authentication URL. 

Any variable included in 

 can be used as a conditional 

variable. However, the best variables to use in conditional statements are the ones that relate to the client 
request instead of the server response, and the variables that may or may not evaluate to TRUE instead 
of the variables that always evaluate to TRUE.

You can define notification pages outside the Web Security appliance by redirecting all notification 
pages to a custom URL you specify. By default, AsyncOS redirects all blocked websites to the URL 
regardless of the reason why it blocked the original page. However, AsyncOS also passes parameters as 
a query string appended to the redirect URL so you can ensure that the user sees a unique page explaining 
the reason for the block. For more information on the included parameters, see 

.

When you want the user to view a different page for each reason for a blocked website, construct a CGI 
script on the web server that can parse the query string in the redirect URL. Then the server can perform 
a second redirect to an appropriate page.

AsyncOS passes the parameters to the web server as standard URL Parameters in the HTTP GET request. 
It uses the following format:

<notification_page_url>?param1=value1&param2=value2

 

%?V 

This conditional variable evaluates to TRUE if the output of variable 
%V is not empty.

%!V

Represents the following condition:

else

 

Use this with the %?V conditional variable.

%#V

Represents the following condition:

endif

 

Use this with the %?V conditional variable.

%?R

<div align="left">

<form name="ReauthInput" action="%r" method="GET">

<input name="Reauth" type="button" OnClick="document.location='%r'"

id="Reauth" value="Login as different user...">

</form>

</div>

%#R