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Mason::Manual::RequestDispatch(3pm) User Contributed Perl Documentation Mason::Manual::RequestDispatch(3pm)NAME
Mason::Manual::RequestDispatch - How request paths get mapped to page components
DESCRIPTION
Given the request path
/news/sports/hockey
Mason searches for the following components in order, setting $m->path_info as noted.
/news/sports/hockey.{mp,mc}
/news/sports/hockey/index.{mp,mc}
/news/sports/hockey/dhandler.{mp,mc}
/news/sports/dhandler.{mp,mc} # $m->path_info = hockey
/news/sports.{mp,mc} # $m->path_info = hockey (but see next section)
/news/dhandler.{mp,mc} # $m->path_info = sports/hockey
/news.{mp,mc} # $m->path_info = sports/hockey (but see next section)
/dhandler.{mp,mc} # $m->path_info = news/sports/hockey
where ".{mp,mc}" means either ".mp" (indicating a pure-perl component). or ".mc" (indicating a top-level component).
The following sections describe these elements in more detail.
Autoextended path
The request path is suffixed with ".mp" and ".mc" to translate it to a component path.
/news/sports/hockey.{mp,mc}
Index
An index matches its exact directory, nothing underneath.
/news/sports/hockey/index.{mp,mc}
Dhandlers
A dhandler matches its directory as well as anything underneath, setting "$m->path_info" to the remainder.
/news/sports/hockey/dhandler.{mp,mc}
/news/sports/dhandler.{mp,mc} # $m->path_info = hockey
/news/dhandler.{mp,mc} # $m->path_info = sports/hockey
/dhandler.{mp,mc} # $m->path_info = news/sports/hockey
Partial paths
A component can match an initial part of the URL, setting "$m->path_info" to the remainder:
/news/sports.{mp,mc} # $m->path_info = hockey
/news.{mp,mc} # $m->path_info = sports/hockey
Since this isn't always desirable behavior, it must be explicitly enabled for the component. Mason will call method "allow_path_info" on
the component class, and will only allow the match if it returns true:
<%class>
method allow_path_info { 1 }
</%class>
The default "allow_path_info" returns false.
"allow_path_info" is not checked on dhandlers, since the whole point of dhandlers is to match partial paths.
Routes
It is possible to use route syntax to more elegantly parse "$m->path_info" for dhandlers and partial paths, e.g.
<%class>
route "{year:[0-9]+}/{month:[0-9]{2}}";
</%class>
See Mason::Plugin::RouterSimple.
SEE ALSO
Mason
AUTHOR
Jonathan Swartz <swartz@pobox.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2011 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.
perl v5.14.2 2012-05-02 Mason::Manual::RequestDispatch(3pm)