.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" HTML::Mason::Escapes \- Functions to escape text for Mason .SH "VERSION" .IX Header "VERSION" version 1.54 .SH "DESCRIPTION" .IX Header "DESCRIPTION" This module contains functions for implementing Mason's substitution escaping feature. These functions may also be called directly. .IP "html_entities_escape" 4 .IX Item "html_entities_escape" This function takes a scalar reference and HTML-escapes it using the \&\f(CW\*(C`HTML::Entities\*(C'\fR module. By default, this module assumes that the string it is escaping is in \s-1ISO\-8859\-1 \s0(pre Perl 5.8.0) or \s-1UTF\-8 \s0(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. .IP "url_escape" 4 .IX Item "url_escape" This takes a scalar reference and replaces any text it contains matching \f(CW\*(C`[^a\-zA\-Z0\-9_.\-]\*(C'\fR with the URL-escaped equivalent, a percent sign (%) followed by the hexadecimal number of that character. .IP "basic_html_escape" 4 .IX Item "basic_html_escape" This function takes a scalar reference and HTML-escapes it, escaping the following characters: '&', '>', '<', and '"'. .Sp It is provided for those who wish to use it to replace (or supplement) the existing 'h' escape flag, via the Interpreter's \f(CW\*(C`set_escape()\*(C'\fR method. .Sp This function is provided in order to allow people to return the \s-1HTML\s0 escaping behavior in 1.0x. However, this behavior presents a potential security risk of allowing cross-site scripting attacks. \&\s-1HTML\s0 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 \*(L"less than\*(R" 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. .SH "SEE ALSO" .IX Header "SEE ALSO" Mason .SH "AUTHORS" .IX Header "AUTHORS" .IP "\(bu" 4 Jonathan Swartz .IP "\(bu" 4 Dave Rolsky .IP "\(bu" 4 Ken Williams .SH "COPYRIGHT AND LICENSE" .IX Header "COPYRIGHT AND LICENSE" This software is copyright (c) 2012 by Jonathan Swartz. .PP This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.