NAME

       HTML::Mason::Escapes - Functions to escape text for Mason

DESCRIPTION

       This module contains functions for implementing Mason's substitution escaping feature.
       These functions may also be called directly.

       html_entities_escape
           This function takes a scalar reference and HTML-escapes it using the "HTML::Entities"
           module.  By default, this module assumes that the string it is escaping is in
           ISO-8859-1 (pre Perl 5.8.0) or UTF-8 (Perl 5.8.0 onwards).  If this is not the case
           for your data, you will want to override this escape to do the right thing for your
           encoding.  See the section on User-defined Escapes in the Developer's Manual for more
           details on how to do this.

       url_escape
           This takes a scalar reference and replaces any text it contains matching
           "[^a-zA-Z0-9_.-]" with the URL-escaped equivalent, a percent sign (%) followed by the
           hexadecimal number of that character.

       basic_html_escape
           This function takes a scalar reference and HTML-escapes it, escaping the following
           characters: '&', '>', '<', and '"'.

           It is provided for those who wish to use it to replace (or supplement) the existing
           'h' escape flag, via the Interpreter's "set_escape()" method.

           This function is provided in order to allow people to return the HTML escaping
           behavior in 1.0x.  However, this behavior presents a potential security risk of
           allowing cross-site scripting attacks.  HTML escaping should always be done based on
           the character set a page is in.  Merely escaping the four characters mentioned above
           is not sufficient.  The quick summary of why is that for some character sets,
           characters other than '<' may be interpreted as a "less than" sign, meaning that just
           filtering '<' and '>' will not stop all cross-site scripting attacks.  See
           http://www.megasecurity.org/Info/cross-site_scripting.txt for more details.