NAME

       HTML::Mason - High-performance, dynamic web site authoring system

VERSION

       version 1.58

SYNOPSIS

           PerlModule HTML::Mason::ApacheHandler

           <Location />
               SetHandler perl-script
               PerlHandler HTML::Mason::ApacheHandler
           </Location>

DESCRIPTION

       Mason is a tool for building, serving and managing large web sites. Its features make it
       an ideal backend for high load sites serving dynamic content, such as online newspapers or
       database driven e-commerce sites.

       Actually, Mason can be used to generate any sort of text, whether for a web site or not.
       But it was originally built for web sites and since that's why most people are interested
       in it, that is the focus of this documentation.

       Mason's various pieces revolve around the notion of "components''. A component is a mix of
       HTML, Perl, and special Mason commands, one component per file. So-called "top-level"
       components represent entire web-pages, while smaller components typically return HTML
       snippets for embedding in top-level components. This object-like architecture greatly
       simplifies site maintenance: change a shared component, and you instantly changed all
       dependent pages that refer to it across a site (or across many virtual sites).

       Mason's component syntax lets designers separate a web page into programmatic and design
       elements. This means the esoteric Perl bits can be hidden near the bottom of a component,
       preloading simple variables for use above in the HTML. In our own experience, this frees
       content managers (i.e., non-programmers) to work on the layout without getting mired in
       programming details. Techies, however, still enjoy the full power of Perl.

       Mason works by intercepting innocent-looking requests (say,
       http://www.yoursite.com/index.html) and mapping them to requests for Mason components.
       Mason then compiles the component, runs it, and feeds the output back to the client.

       Consider this simple Mason component:

           % my $noun = 'World';
           Hello <% $noun %>!
           How are ya?

       The output of this component is:

           Hello World!
           How are ya?

       In this component you see a mix of standard HTML and Mason elements. The bare '%'
       prefixing the first line tells Mason that this is a line of Perl code. One line below, the
       embedded <% ... %> tag gets replaced with the return value of its contents, evaluated as a
       Perl expression.

       Beyond this trivial example, components can also embed serious chunks of Perl code (say,
       to pull records from a database). They can also call other components, cache results for
       later reuse, and perform all the tricks you expect from a regular Perl program.

WAIT - HAVE YOU SEEN MASON 2?

       Version 1 of Mason (this distribution) -- has been around since 1998, is in wide use, and
       is very stable. However it has not changed much in years and is no longer actively
       developed.

       Version 2 of Mason -- Mason -- was released in February of 2011. It offers a new syntax as
       well as a number of other features. See
       <https://metacpan.org/pod/distribution/Mason/lib/Mason/Manual/UpgradingFromMason1.pod> for
       details of the differences between the two.

INSTALLATION

       Mason has been tested under Linux, FreeBSD, Solaris, HPUX, and Win32. As an all-Perl
       solution, it should work on any machine that has working versions of Perl 5.00503+,
       mod_perl, and the required CPAN modules.

       Mason has a standard MakeMaker-driven installation. See the README file for details.

CONFIGURING MASON

       This section assumes that you are able to install and configure a mod_perl server.
       Relevant documentation is available at http://www.apache.org (Apache) and
       http://perl.apache.org (mod_perl). The mod_perl mailing list, archive, and guide are also
       great resources.

       The simplest configuration of Mason requires a few lines in your httpd.conf:

           PerlModule HTML::Mason::ApacheHandler

           <Location />
               SetHandler perl-script
               PerlHandler HTML::Mason::ApacheHandler
           </Location>

       The PerlModule directive simply ensures that the Mason code is loaded in the parent
       process before forking, which can save some memory when running mod_perl.

       The <Location> section routes all requests to the Mason handler, which is a simple way to
       try out Mason. A more refined setup is discussed in the Controlling Access via Filename
       Extension section of the administrator's manual.

       Once you have added the configuration directives, restart the server. First, go to a
       standard URL on your site to make sure you haven't broken anything. If all goes well you
       should see the same page as before. If not, recheck your Apache config files and also tail
       your server's error log.

       If you are getting "404 Not Found" errors even when the files clearly exist, Mason may be
       having trouble with your document root. One situation that will unfortunately confuse
       Mason is if your document root goes through a symbolic link. Try expressing your document
       root in terms of the true filesystem path.

       Next, try adding the tag <% 2+2 %> at the top of some HTML file. If you reload this page
       and see a "4", Mason is working!

DOCUMENTATION ROADMAP

       Once Mason is on its feet, the next step is to write a component or two. The Mason
       Developer's Manual is a complete tutorial for writing, using, and debugging components. A
       reference companion to the Developer's Manual is the Request API documentation,
       HTML::Mason::Request.

       Whoever is responsible for setting up and tuning Mason should read the Administrator's
       Manual, though developers will also benefit from reading it as well. This document covers
       more advanced configuration scenarios and performance optimization. The reference
       companion to the Administrator's manual is the Parameters Reference, which describes all
       the parameters you can use to configure Mason.

       Most of this documentation assumes that you're running Mason on top of mod_perl, since
       that is the most common configuration.  If you would like to run Mason via a CGI script,
       refer to the HTML::Mason::CGIHandler documentation.  If you are using Mason from a
       standalone program, refer to the Using Mason from a Standalone Script section of the
       administrator's manual.

       There is also a book about Mason, Embedding Perl in HTML with Mason, by Dave Rolsky and
       Ken Williams, published by O'Reilly and Associates.  The book's website is at
       http://www.masonbook.com/.  This book goes into detail on a number of topics, and includes
       a chapter of recipes as well as a sample Mason-based website.

GETTING HELP AND SOURCES

       Questions and feedback are welcome, and should be directed to the Mason mailing list. You
       must be subscribed to post.

           https://lists.sourceforge.net/lists/listinfo/mason-users

       You can also visit us at "#mason" on <irc://irc.perl.org/#mason>.

       Bugs and feature requests will be tracked at RT:

           http://rt.cpan.org/NoAuth/Bugs.html?Dist=HTML-Mason
           bug-html-mason@rt.cpan.org

SUPPORT

       Bugs may be submitted at <http://rt.cpan.org/Public/Dist/Display.html?Name=HTML-Mason> or
       via email to bug-html-mason@rt.cpan.org <mailto:bug-html-mason@rt.cpan.org>.

       I am also usually active on IRC as 'autarch' on "irc://irc.perl.org".

SOURCE

       The source code repository for HTML-Mason can be found at
       <https://github.com/houseabsolute/HTML-Mason>.

AUTHORS

       •   Jonathan Swartz <swartz@pobox.com>

       •   Dave Rolsky <autarch@urth.org>

       •   Ken Williams <ken@mathforum.org>

CONTRIBUTORS

       •   Ævar Arnfjörð Bjarmason <avarab@gmail.com>

       •   Alex Balhatchet <kaoru@slackwise.net>

       •   Alex Vandiver <alex@chmrr.net>

       •   John Williams <jwilliams@cpan.org>

       •   Kent Fredric <kentnl@gentoo.org>

       •   Kevin Falcone <falcone@bestpractical.com>

       •   Patrick Kane <modus-cpan@pr.es.to>

       •   Ricardo Signes <rjbs@cpan.org>

       •   Shlomi Fish <shlomif@shlomifish.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 1998 - 2017 by Jonathan Swartz.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.

       The full text of the license can be found in the LICENSE file included with this
       distribution.