Using Filters

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Xitami
Version 2.4c3

Using Filters

Xitami supports filter programs in Perl, C, or any other language that your system supports. A filter program runs when the HTML page is displayed, unlike a CGI program, which runs when the user posts data from a HTML form. An example of a filter program is PHP 3.0, which Xitami supports.

To add your own filter programs, you add an entry in the [Filter] section of the config file. A filter program is invoked whenever a file with the appropriate extension is displayed.

Filter programs need to respect the rules for CGI programs. That is, they should generate the same type of header (Content-Type: text/html). Filter programs also get the standard CGI environment, and are subject to the CGI timeouts and other constraints set in the [CGI] section.

When you POST to a filter program, the form data is supplied on the standard input as for CGI programs. When you use the GET method, the file that is being filtered is provided on the standard input.