NAME
    Catalyst::Plugin::VersionedURI - add version component to uris

VERSION
    version 1.1.1

SYNOPSIS
    In your config file:

        <Plugin::VersionedURI>
            uri   static/
            mtime 0 
        </Plugin::VersionedURI>

    In "MyApp.pm":

       package MyApp;

       use Catalyst qw/ VersionedURI /;

    In the Apache config:

        <Directory /home/myapp/static>
            ExpiresActive on
            ExpiresDefault "access plus 1 year"
        </Directory>

DESCRIPTION
    "Catalyst::Plugin::VersionedURI" adds a versioned component to uris
    returned by "uri_for()" matching a given set of regular expressions
    provided in the configuration file. E.g.,

        $c->uri_for( '/static/images/foo.png' );

    will, with the configuration used in the SYNOPSIS return

        /static/images/foo.png?v=1.2.3

    This can be useful, mainly, to have the static files of a site magically
    point to a new location upon new releases of the application, and thus
    bypass previously set expiration times.

    The versioned component of the uri resolves to the version of the
    application.

CONFIGURATION
  uri
    The plugin's accepts any number of "uri" configuration elements, which
    are taken as regular expressions to be matched against the uris. The
    regular expressions are implicitly anchored at the beginning of the uri,
    and at the end by a '/'. If not given, defaults to "/static".

  mtime
    If set to a true value, the plugin will use the file's modification time
    for versioning instead of the application's version. The modification
    time is checked only once for each file. If a file is changed after the
    application is started, the old version number will continue to be used.
    Checking the modification time on each uri, each time it is served,
    would result in considerable additional overhead.

  include_path
    A list of directories to search for files if you specify the "mtime"
    flag. If no file is found, the application version is used. Defaults to
    "MyApp-"config->{root}>.

  in_path
    If true, add the versioned element as part of the path (right after the
    matched uri). If false, the versioned element is added as a query
    parameter. For example, if we match on '/static', the base uri
    '/static/foo.png' will resolve to '/static/v1.2.3/foo.png' if 'in_path'
    is *true*, and '/static/foo.png?v=1.2.3' if *false*.

    Defaults to false.

  param
    Name of the parameter to be used for the versioned element. Defaults to
    'v'.

    Not used if *in_path* is set to *true*.

WEB SERVER-SIDE CONFIGURATION
    Of course, the redirection to a versioned uri is a sham to fool the
    browsers into refreshing their cache. If the path is modified because
    *in_path* is set to *true*, it's typical to configure the front-facing
    web server to point back to the same back-end directory.

  Apache
    To munge the paths back to the base directory, the Apache configuration
    can look like:

        <Directory /home/myapp/static>
            RewriteEngine on
            RewriteRule ^v[0123456789._]+/(.*)$ /myapp/static/$1 [PT]
 
            ExpiresActive on
            ExpiresDefault "access plus 1 year"
        </Directory>

YOU BROKE MY DEVELOPMENT SERVER, YOU INSENSITIVE CLOD!
    If *in_path* is set to *true*, while the plugin is working fine with a
    web-server front-end, it's going to seriously cramp your style if you
    use, for example, the application's standalone server, as now all the
    newly-versioned uris are not going to resolve to anything. The obvious
    solution is, well, fairly obvious: remove the VersionedURI configuration
    stanza from your development configuration file.

    If, for whatever reason, you absolutly want your application to deal
    with the versioned paths with or without the web server front-end, you
    can use Catalyst::Controller::VersionedURI, which will undo what
    "Catalyst::Plugin::VersionedURI" toiled to shoe-horn in.

THANKS
    Mark Grimes, Alexander Hartmaier.

SEE ALSO
    Blog entry introducing the module:
    <http://babyl.dyndns.org/techblog/entry/versioned-uri>.
    Catalyst::Controller::VersionedURI

AUTHOR
    Yanick Champoux <yanick@babyl.dyndns.org>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2011 by Yanick Champoux.

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