HTML::Mason::Params(3)User Contributed Perl DocumentatioHTML::Mason::Params(3)NAMEHTML::Mason::Params - Mason configuration parameters
VERSION
version 1.54
DESCRIPTION
This document lists all of the Mason configuration parameters that are
intended to be used by end users.
PERL AND APACHE NAMES
Each parameter has two names: a Perl version and an Apache version.
The Perl version uses "lowercase_with_underscores", while the Apache
version uses "StudlyCaps" with a "Mason" prefix. The conversion from
one version to the other is otherwise very predictable. For example,
· "autohandler_name" "<-->" "MasonAutohandlerName"
· "comp_root" "<-->" "MasonCompRoot"
· "data_cache_defaults" "<-->" "MasonDataCacheDefaults"
Where Apache Names Are Used
The Apache parameter names are used in the Apache configuration file in
an httpd-based configuration.
Where Perl Names Are Used
The Perl parameter names are used from Perl code, i.e. anywhere other
than the Apache configuration file. For example,
· In an custom wrapper-based configuration, you can pass most of
these parameters to the ApacheHandler constructor.
· In a standalone Mason script, you can pass most of these parameters
to the Interp constructor.
· When launching a subrequest, you can pass any of the
"HTML::Mason::Request" parameters to make_subrequest.
PARAMETERS
allow_globals
· Perl name: allow_globals
· Apache name: MasonAllowGlobals
· Type in httpd.conf: list
· Default: []
· Belongs to: "HTML::Mason::Compiler"
List of variable names, complete with prefix ("$@%"), that you intend
to use as globals in components. Normally global variables are
forbidden by "strict", but any variable mentioned in this list is
granted a reprieve via a "use vars" statement. For example:
allow_globals => [qw($DBH %session)]
In a mod_perl environment, $r (the request object) is automatically
added to this list.
apache_status_title
· Perl name: apache_status_title
· Apache name: MasonApacheStatusTitle
· Type in httpd.conf: string
· Default: HTML::Mason status
· Belongs to: "HTML::Mason::ApacheHandler"
Title that you want this ApacheHandler to appear as under
Apache::Status. Default is "HTML::Mason status". This is useful if
you create more than one ApacheHandler object and want them all visible
via Apache::Status.
args_method
· Perl name: args_method
· Apache name: MasonArgsMethod
· Type in httpd.conf: string
· Default: mod_perl
· Belongs to: "HTML::Mason::ApacheHandler"
Method to use for unpacking GET and POST arguments. The valid options
are 'CGI' and 'mod_perl'; these indicate that a "CGI.pm" or
"Apache::Request" object (respectively) will be created for the
purposes of argument handling.
'mod_perl' is the default under mod_perl-1 and requires that you have
installed the "Apache::Request" package. Under mod_perl-2, the default
is 'CGI' because "Apache2::Request" is still in development.
If args_method is 'mod_perl', the $r global is upgraded to an
Apache::Request object. This object inherits all Apache methods and
adds a few of its own, dealing with parameters and file uploads. See
"Apache::Request" for more information.
If the args_method is 'CGI', the Mason request object ($m) will have a
method called "cgi_object" available. This method returns the CGI
object used for argument processing.
While Mason will load "Apache::Request" or "CGI" as needed at runtime,
it is recommended that you preload the relevant module either in your
httpd.conf or handler.pl file, as this will save some memory.
auto_send_headers
· Perl name: auto_send_headers
· Apache name: MasonAutoSendHeaders
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::Request::ApacheHandler"
True or false, default is true. Indicates whether Mason should
automatically send HTTP headers before sending content back to the
client. If you set to false, you should call "$r->send_http_header"
manually.
See the sending HTTP headers section of the developer's manual for more
details about the automatic header feature.
NOTE: This parameter has no effect under mod_perl-2, since calling
"$r->send_http_header" is no longer needed.
autoflush
· Perl name: autoflush
· Apache name: MasonAutoflush
· Type in httpd.conf: boolean
· Default: 0
· Belongs to: "HTML::Mason::Request"
True or false, default is false. Indicates whether to flush the output
buffer ("$m->flush_buffer") after every string is output. Turn on
autoflush if you need to send partial output to the client, for example
in a progress meter.
As of Mason 1.3, autoflush will only work if enable_autoflush has been
set. Components can be compiled more efficiently if they don't have to
check for autoflush. Before using autoflush you might consider whether
a few manual "$m->flush_buffer" calls would work nearly as well.
autohandler_name
· Perl name: autohandler_name
· Apache name: MasonAutohandlerName
· Type in httpd.conf: string
· Default: autohandler
· Belongs to: "HTML::Mason::Interp"
File name used for autohandlers. Default is "autohandler". If this is
set to an empty string ("") then autohandlers are turned off entirely.
buffer_preallocate_size
· Perl name: buffer_preallocate_size
· Apache name: MasonBufferPreallocateSize
· Type in httpd.conf: string
· Default: 0
· Belongs to: "HTML::Mason::Interp"
Number of bytes to preallocate in the output buffer for each request.
Defaults to 0. Setting this to, say, your maximum page size (or close
to it) can reduce the number of reallocations Perl performs as
components add to the output buffer.
code_cache_max_size
· Perl name: code_cache_max_size
· Apache name: MasonCodeCacheMaxSize
· Type in httpd.conf: string
· Default: unlimited
· Belongs to: "HTML::Mason::Interp"
Specifies the maximum number of components that should be held in the
in-memory code cache. The default is 'unlimited', meaning no components
will ever be discarded; Mason can perform certain optimizations in this
mode. Setting this to zero disables the code cache entirely. See the
code cache section of the administrator's manual for further details.
comp_class
· Perl name: comp_class
· Apache name: MasonCompClass
· Type in httpd.conf: string
· Default: HTML::Mason::Component
· Belongs to: "HTML::Mason::Compiler::ToObject"
The class into which component objects are blessed. This defaults to
HTML::Mason::Component.
comp_root
· Perl name: comp_root
· Apache name: MasonCompRoot
· Type in httpd.conf: list
· Default: Varies
· Belongs to: "HTML::Mason::Interp"
The component root marks the top of your component hierarchy and
defines how component paths are translated into real file paths. For
example, if your component root is /usr/local/httpd/docs, a component
path of /products/index.html translates to the file
/usr/local/httpd/docs/products/index.html.
Under Apache and CGI, comp_root defaults to the server's document root.
In standalone mode comp_root defaults to the current working directory.
This parameter may be either a scalar or an array reference. If it is
a scalar, it should be a filesystem path indicating the component root.
If it is an array reference, it should be of the following form:
[ [ foo => '/usr/local/foo' ],
[ bar => '/usr/local/bar' ] ]
This is an array of two-element array references, not a hash. The
"keys" for each path must be unique and their "values" must be
filesystem paths. These paths will be searched in the provided order
whenever a component path is resolved. For example, given the above
component roots and a component path of /products/index.html, Mason
would search first for /usr/local/foo/products/index.html, then for
/usr/local/bar/products/index.html.
The keys are used in several ways. They help to distinguish component
caches and object files between different component roots, and they
appear in the "title()" of a component.
When you specify a single path for a component root, this is actually
translated into
[ [ MAIN => path ] ]
If you have turned on dynamic_comp_root, you may modify the component
root(s) of an interpreter between requests by calling
"$interp->comp_root" with a value. However, the path associated with
any given key may not change between requests. For example, if the
initial component root is
[ [ foo => '/usr/local/foo' ],
[ bar => '/usr/local/bar' ], ]
then it may not be changed to
[ [ foo => '/usr/local/bar' ],
[ bar => '/usr/local/baz' ],
but it may be changed to
[ [ foo => '/usr/local/foo' ],
[ blarg => '/usr/local/blarg' ] ]
In other words, you may add or remove key/path pairs but not modify an
already-used key/path pair. The reason for this restriction is that the
interpreter maintains a component cache per key that would become
invalid if the associated paths were to change.
compiler_class
· Perl name: compiler_class
· Apache name: MasonCompilerClass
· Type in httpd.conf: string
· Default: HTML::Mason::Compiler::ToObject
· Belongs to: "HTML::Mason::Interp"
The class to use when creating a compiler. Defaults to
HTML::Mason::Compiler::ToObject.
component_error_handler
· Perl name: component_error_handler
· Apache name: MasonComponentErrorHandler
· Type in httpd.conf: code
· Default: sub { package HTML::Mason::Exceptions; use
warnings; use strict 'refs'; my($err) = @_; return unless $err; if
(UNIVERSAL::can($err, 'rethrow')) { $err->rethrow; } elsif (ref
$err) { die $err; } 'HTML::Mason::Exception'->throw('error', $err);
}
· Belongs to: "HTML::Mason::Request"
A code reference used to handle errors thrown during component
compilation or runtime. By default, this is a subroutine that turns
non-exception object errors in components into exceptions. If this
parameter is set to a false value, these errors are simply rethrown as-
is.
Turning exceptions into objects can be expensive, since this will cause
the generation of a stack trace for each error. If you are using
strings or unblessed references as exceptions in your code, you may
want to turn this off as a performance boost.
data_cache_api
· Perl name: data_cache_api
· Apache name: MasonDataCacheApi
· Type in httpd.conf: string
· Default: 1.1
· Belongs to: "HTML::Mason::Request"
The "$m->cache" API to use:
· '1.1', the default, indicates a "Cache::Cache" based API.
· 'chi' indicates a "CHI" based API.
· '1.0' indicates the custom cache API used in Mason 1.0x and
earlier. This compatibility layer is provided as a convenience for
users upgrading from older versions of Mason, but will not be
supported indefinitely.
data_cache_defaults
· Perl name: data_cache_defaults
· Apache name: MasonDataCacheDefaults
· Type in httpd.conf: hash_list
· Default: None
· Belongs to: "HTML::Mason::Request"
A hash reference of default options to use for the "$m->cache" command.
For example, to use Cache::Cache's "MemoryCache" implementation by
default:
data_cache_defaults => {cache_class => 'MemoryCache'}
To use the CHI "FastMmap" driver by default:
data_cache_api => 'CHI',
data_cache_defaults => {driver => 'FastMmap'},
These settings are overridden by options given to particular
"$m->cache" calls.
data_dir
· Perl name: data_dir
· Apache name: MasonDataDir
· Type in httpd.conf: string
· Default: None
· Belongs to: "HTML::Mason::Interp"
The data directory is a writable directory that Mason uses for various
features and optimizations: for example, component object files and
data cache files. Mason will create the directory on startup, if
necessary, and set its permissions according to the web server
User/Group.
Under Apache, data_dir defaults to a directory called "mason" under the
Apache server root. You will need to change this on certain systems
that assign a high-level server root such as /usr!
In non-Apache environments, data_dir has no default. If it is left
unspecified, Mason will not use object files, and the default data
cache class will be "MemoryCache" instead of "FileCache".
decline_dirs
· Perl name: decline_dirs
· Apache name: MasonDeclineDirs
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::ApacheHandler"
True or false, default is true. Indicates whether Mason should decline
directory requests, leaving Apache to serve up a directory index or a
"FORBIDDEN" error as appropriate. See the allowing directory requests
section of the administrator's manual for more information about
handling directories with Mason.
default_escape_flags
· Perl name: default_escape_flags
· Apache name: MasonDefaultEscapeFlags
· Type in httpd.conf: string
· Default: []
· Belongs to: "HTML::Mason::Compiler"
Escape flags to apply to all <% %> expressions by default. The current
valid flags are
h - escape for HTML ('<' => '<', etc.)
u - escape for URL (':' => '%3A', etc.)
The developer can override default escape flags on a per-expression
basis; see the escaping expressions section of the developer's manual.
If you want to set multiple flags as the default, this should be given
as a reference to an array of flags.
define_args_hash
· Perl name: define_args_hash
· Apache name: MasonDefineArgsHash
· Type in httpd.conf: string
· Default: auto
· Belongs to: "HTML::Mason::Compiler::ToObject"
One of "always", "auto", or "never". This determines whether or not an
%ARGS hash is created in components. If it is set to "always", one is
always defined. If set to "never", it is never defined.
The default, "auto", will cause the hash to be defined only if some
part of the component contains the string "ARGS". This is somewhat
crude, and may result in some false positives, but this is preferable
to false negatives.
Not defining the args hash means that we can avoid copying component
arguments, which can save memory and slightly improve execution speed.
dhandler_name
· Perl name: dhandler_name
· Apache name: MasonDhandlerName
· Type in httpd.conf: string
· Default: dhandler
· Belongs to: "HTML::Mason::Request"
File name used for dhandlers. Default is "dhandler". If this is set to
an empty string ("") then dhandlers are turned off entirely.
dynamic_comp_root
· Perl name: dynamic_comp_root
· Apache name: MasonDynamicCompRoot
· Type in httpd.conf: boolean
· Default: 0
· Belongs to: "HTML::Mason::Interp"
True or false, defaults to false. Indicates whether the comp_root can
be modified on this interpreter between requests. Mason can perform a
few optimizations with a fixed component root, so you should only set
this to true if you actually need it.
enable_autoflush
· Perl name: enable_autoflush
· Apache name: MasonEnableAutoflush
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::Compiler"
True or false, default is true. Indicates whether components are
compiled with support for autoflush. The component can be compiled to a
more efficient form if it does not have to check for autoflush mode, so
you should set this to 0 if you can.
error_format
· Perl name: error_format
· Apache name: MasonErrorFormat
· Type in httpd.conf: string
· Default: Varies
· Belongs to: "HTML::Mason::Request"
Indicates how errors are formatted. The built-in choices are
· brief - just the error message with no trace information
· text - a multi-line text format
· line - a single-line text format, with different pieces of
information separated by tabs (useful for log files)
· html - a fancy html format
The default format under Apache and CGI is either line or html
depending on whether the error mode is fatal or output, respectively.
The default for standalone mode is text.
The formats correspond to "HTML::Mason::Exception" methods named
as_format. You can define your own format by creating an appropriately
named method; for example, to define an "xml" format, create a method
"HTML::Mason::Exception::as_xml" patterned after one of the built-in
methods.
error_mode
· Perl name: error_mode
· Apache name: MasonErrorMode
· Type in httpd.conf: string
· Default: Varies
· Belongs to: "HTML::Mason::Request"
Indicates how errors are returned to the caller. The choices are
fatal, meaning die with the error, and output, meaning output the error
just like regular output.
The default under Apache and CGI is output, causing the error to be
displayed in the browser. The default for standalone mode is fatal.
escape_flags
· Perl name: escape_flags
· Apache name: MasonEscapeFlags
· Type in httpd.conf: hash_list
· Default: None
· Belongs to: "HTML::Mason::Interp"
A hash reference of escape flags to set for this object. See the
section on the set_escape method for more details.
ignore_warnings_expr
· Perl name: ignore_warnings_expr
· Apache name: MasonIgnoreWarningsExpr
· Type in httpd.conf: regex
· Default: qr/Subroutine .* redefined/i
· Belongs to: "HTML::Mason::Interp"
Regular expression indicating which warnings to ignore when loading
components. Any warning that is not ignored will prevent the component
from being loaded and executed. For example:
ignore_warnings_expr =>
'Global symbol.*requires explicit package'
If set to undef, all warnings are heeded. If set to '.', warnings are
turned off completely as a specially optimized case.
By default, this is set to 'Subroutine .* redefined'. This allows you
to declare global subroutines inside <%once> sections and not receive
an error when the component is reloaded.
in_package
· Perl name: in_package
· Apache name: MasonInPackage
· Type in httpd.conf: string
· Default: HTML::Mason::Commands
· Belongs to: "HTML::Mason::Compiler::ToObject"
This is the package in which a component's code is executed. For
historical reasons, this defaults to "HTML::Mason::Commands".
interp_class
· Perl name: interp_class
· Apache name: MasonInterpClass
· Type in httpd.conf: string
· Default: HTML::Mason::Interp
· Belongs to: "HTML::Mason::ApacheHandler"
The class to use when creating a interpreter. Defaults to
HTML::Mason::Interp.
lexer_class
· Perl name: lexer_class
· Apache name: MasonLexerClass
· Type in httpd.conf: string
· Default: HTML::Mason::Lexer
· Belongs to: "HTML::Mason::Compiler"
The class to use when creating a lexer. Defaults to HTML::Mason::Lexer.
max_recurse
· Perl name: max_recurse
· Apache name: MasonMaxRecurse
· Type in httpd.conf: string
· Default: 32
· Belongs to: "HTML::Mason::Request"
The maximum recursion depth for the component stack, for the request
stack, and for the inheritance stack. An error is signalled if the
maximum is exceeded. Default is 32.
named_component_subs
· Perl name: named_component_subs
· Apache name: MasonNamedComponentSubs
· Type in httpd.conf: boolean
· Default: 0
· Belongs to: "HTML::Mason::Compiler::ToObject"
When compiling a component, use uniquely named subroutines for the a
component's body, subcomponents, and methods. Doing this allows you to
effectively profile Mason components. Without this, all components
simply show up as __ANON__ or something similar in the profiler.
object_file_extension
· Perl name: object_file_extension
· Apache name: MasonObjectFileExtension
· Type in httpd.conf: string
· Default: .obj
· Belongs to: "HTML::Mason::Interp"
Extension to add to the end of object files. Default is ".obj".
out_method
· Perl name: out_method
· Apache name: MasonOutMethod
· Type in httpd.conf: code
· Default: Print to STDOUT
· Belongs to: "HTML::Mason::Request"
Indicates where to send output. If out_method is a reference to a
scalar, output is appended to the scalar. If out_method is a reference
to a subroutine, the subroutine is called with each output string. For
example, to send output to a file called "mason.out":
my $fh = new IO::File ">mason.out";
...
out_method => sub { $fh->print($_[0]) }
By default, out_method prints to standard output. Under Apache,
standard output is redirected to "$r->print".
plugins
· Perl name: plugins
· Apache name: MasonPlugins
· Type in httpd.conf: list
· Default: []
· Belongs to: "HTML::Mason::Request"
An array of plugins that will be called at various stages of request
processing. Please see HTML::Mason::Plugin for details.
postamble
· Perl name: postamble
· Apache name: MasonPostamble
· Type in httpd.conf: string
· Default: None
· Belongs to: "HTML::Mason::Compiler::ToObject"
Text given for this parameter is placed at the end of each component.
See also preamble. The request will be available as $m in postamble
code.
postprocess_perl
· Perl name: postprocess_perl
· Apache name: MasonPostprocessPerl
· Type in httpd.conf: code
· Default: None
· Belongs to: "HTML::Mason::Compiler"
Sub reference that is called to postprocess the Perl portion of a
compiled component, just before it is assembled into its final
subroutine form. The sub is called with a single parameter, a scalar
reference to the Perl portion of the component. The sub is expected to
process the string in-place. See also preprocess and postprocess_text.
postprocess_text
· Perl name: postprocess_text
· Apache name: MasonPostprocessText
· Type in httpd.conf: code
· Default: None
· Belongs to: "HTML::Mason::Compiler"
Sub reference that is called to postprocess the text portion of a
compiled component, just before it is assembled into its final
subroutine form. The sub is called with a single parameter, a scalar
reference to the text portion of the component. The sub is expected to
process the string in-place. See also preprocess and postprocess_perl.
preamble
· Perl name: preamble
· Apache name: MasonPreamble
· Type in httpd.conf: string
· Default: None
· Belongs to: "HTML::Mason::Compiler::ToObject"
Text given for this parameter is placed at the beginning of each
component, but after the execution of any "<%once>" block. See also
postamble. The request will be available as $m in preamble code.
preloads
· Perl name: preloads
· Apache name: MasonPreloads
· Type in httpd.conf: list
· Default: None
· Belongs to: "HTML::Mason::Interp"
A list of component paths, optionally with glob wildcards, to load when
the interpreter initializes. e.g.
preloads => ['/foo/index.html','/bar/*.pl']
Default is the empty list. For maximum performance, this should only
be used for components that are frequently viewed and rarely updated.
See the preloading components section of the administrator's manual for
further details.
As mentioned in the developer's manual, a component's "<%once>" section
is executed when it is loaded. For preloaded components, this means
that this section will be executed before a Mason or Apache request
exist, so preloading a component that uses $m or $r in a "<%once>"
section will fail.
preprocess
· Perl name: preprocess
· Apache name: MasonPreprocess
· Type in httpd.conf: code
· Default: None
· Belongs to: "HTML::Mason::Compiler"
Sub reference that is called to preprocess each component before the
compiler does it's magic. The sub is called with a single parameter, a
scalar reference to the script. The sub is expected to process the
script in-place. This is one way to extend the HTML::Mason syntax
with new tags, etc., although a much more flexible way is to subclass
the Lexer or Compiler class. See also postprocess_text and
postprocess_perl.
request_class
· Perl name: request_class
· Apache name: MasonRequestClass
· Type in httpd.conf: string
· Default: HTML::Mason::Request
· Belongs to: "HTML::Mason::Interp"
The class to use when creating requests. Defaults to
HTML::Mason::Request.
resolver_class
· Perl name: resolver_class
· Apache name: MasonResolverClass
· Type in httpd.conf: string
· Default: HTML::Mason::Resolver::File
· Belongs to: "HTML::Mason::Interp"
The class to use when creating a resolver. Defaults to
HTML::Mason::Resolver::File.
static_source
· Perl name: static_source
· Apache name: MasonStaticSource
· Type in httpd.conf: boolean
· Default: 0
· Belongs to: "HTML::Mason::Interp"
True or false, default is false. When false, Mason checks the timestamp
of the component source file each time the component is used to see if
it has changed. This provides the instant feedback for source changes
that is expected for development. However it does entail a file stat
for each component executed.
When true, Mason assumes that the component source tree is unchanging:
it will not check component source files to determine if the memory
cache or object file has expired. This can save many file stats per
request. However, in order to get Mason to recognize a component source
change, you must flush the memory cache and remove object files. See
static_source_touch_file for one easy way to arrange this.
We recommend turning this mode on in your production sites if possible,
if performance is of any concern.
static_source_touch_file
· Perl name: static_source_touch_file
· Apache name: MasonStaticSourceTouchFile
· Type in httpd.conf: string
· Default: None
· Belongs to: "HTML::Mason::Interp"
Specifies a filename that Mason will check once at the beginning of of
every request. When the file timestamp changes, Mason will (1) clear
its in-memory component cache, and (2) remove object files if they have
not already been deleted by another process.
This provides a convenient way to implement static_source mode. All
you need to do is make sure that a single file gets touched whenever
components change. For Mason's part, checking a single file at the
beginning of a request is much cheaper than checking every component
file when static_source=0.
subcomp_class
· Perl name: subcomp_class
· Apache name: MasonSubcompClass
· Type in httpd.conf: string
· Default: HTML::Mason::Component::Subcomponent
· Belongs to: "HTML::Mason::Compiler::ToObject"
The class into which subcomponent objects are blessed. This defaults
to HTML::Mason::Component::Subcomponent.
use_object_files
· Perl name: use_object_files
· Apache name: MasonUseObjectFiles
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::Interp"
True or false, default is true. Specifies whether Mason creates object
files to save the results of component parsing. You may want to turn
off object files for disk space reasons, but otherwise this should be
left alone.
use_source_line_numbers
· Perl name: use_source_line_numbers
· Apache name: MasonUseSourceLineNumbers
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::Compiler"
True or false, default is true. Indicates whether component line
numbers that appear in error messages, stack traces, etc. are in terms
of the source file instead of the object file. Mason does this by
inserting '#line' directives into compiled components. While source
line numbers are more immediately helpful, object file line numbers may
be more appropriate for in-depth debugging sessions.
use_strict
· Perl name: use_strict
· Apache name: MasonUseStrict
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::Compiler::ToObject"
True or false, default is true. Indicates whether or not a given
component should "use strict".
use_warnings
· Perl name: use_warnings
· Apache name: MasonUseWarnings
· Type in httpd.conf: boolean
· Default: 1
· Belongs to: "HTML::Mason::Compiler::ToObject"
True or false, default is false. Indicates whether or not a given
component should "use warnings".
SEE ALSO
Mason
AUTHORS
· Jonathan Swartz <swartz@pobox.com>
· Dave Rolsky <autarch@urth.org>
· Ken Williams <ken@mathforum.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 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 v5.18.2 2014-01-19 HTML::Mason::Params(3)