apache2::const.3

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.\" ========================================================================
.\"
.IX Title "mod_perl-2.0.2::docs::api::Apache2::Const 3"
.TH mod_perl-2.0.2::docs::api::Apache2::Const 3 "2005-10-21" "perl v5.10.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Apache2::Const \- Perl Interface for Apache Constants
.SH "Synopsis"
.IX Header "Synopsis"
.Vb 2
\&  # make the constants available but don\*(Aqt import them
\&  use Apache2::Const \-compile => qw(constant names ...);
\&  
\&  # w/o the => syntax sugar
\&  use Apache2::Const ("\-compile", qw(constant names ...));
\&  
\&  # compile and import the constants
\&  use Apache2::Const qw(constant names ...);
.Ve
.SH "Description"
.IX Header "Description"
This package contains constants specific to \f(CW\*(C`Apache\*(C'\fR features.
.PP
mod_perl 2.0 comes with several hundreds of constants, which you don't
want to make available to your Perl code by default, due to \s-1CPU\s0 and
memory overhead. Therefore when you want to use a certain constant you
need to explicitly ask to make it available.
.PP
For example, the code:
.PP
.Vb 1
\&  use Apache2::Const \-compile => qw(FORBIDDEN OK);
.Ve
.PP
makes the constants \f(CW\*(C`Apache2::Const::FORBIDDEN\*(C'\fR and \f(CW\*(C`Apache2::Const::OK\*(C'\fR available
to your code, but they aren't imported. In which case you need to use
a fully qualified constants, as in:
.PP
.Vb 1
\&  return Apache2::Const::OK;
.Ve
.PP
If you drop the argument \f(CW\*(C`\-compile\*(C'\fR and write:
.PP
.Vb 1
\&  use Apache2::Const qw(FORBIDDEN OK);
.Ve
.PP
Then both constants are imported into your code's namespace and can be
used standalone like so:
.PP
.Vb 1
\&  return OK;
.Ve
.PP
Both, due to the extra memory requirement, when importing symbols, and
since there are constants in other namespaces (e.g.,
\&\f(CW\*(C`APR::\*(C'\fR and
\&\f(CW\*(C`ModPerl::\*(C'\fR, and non\-mod_perl
modules) which may contain the same names, it's not recommended to
import constants. I.e. you want to use the \f(CW\*(C`\-compile\*(C'\fR construct.
.PP
Finaly, in Perl \f(CW\*(C`=>\*(C'\fR is almost the same as the comma operator. It
can be used as syntax sugar making it more clear when there is a
key-value relation between two arguments, and also it automatically
parses its lefthand argument (the key) as a string, so you don't need
to quote it.
.PP
If you don't want to use that syntax, instead of writing:
.PP
.Vb 1
\& use Apache2::Const \-compile => qw(FORBIDDEN OK);
.Ve
.PP
you could write:
.PP
.Vb 1
\& use Apache2::Const "\-compile", qw(FORBIDDEN OK);
.Ve
.PP
and for parentheses-lovers:
.PP
.Vb 1
\& use Apache2::Const ("\-compile", qw(FORBIDDEN OK));
.Ve
.SH "Constants"
.IX Header "Constants"
.ie n .Sh """:cmd_how"""
.el .Sh "\f(CW:cmd_how\fP"
.IX Subsection ":cmd_how"
.Vb 1
\&  use Apache2::Const \-compile => qw(:cmd_how);
.Ve
.PP
The \f(CW\*(C`:cmd_how\*(C'\fR constants group is used in
\&\f(CW\*(C`Apache2::Module::add()\*(C'\fR
and
\&\f(CW\*(C`$cmds\->args_how\*(C'\fR.
.PP
\fI\f(CI\*(C`Apache2::Const::FLAG\*(C'\fI\fR
.IX Subsection "Apache2::Const::FLAG"
.PP
One of \fIOn\fR or \fIOff\fR (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::ITERATE\*(C'\fI\fR
.IX Subsection "Apache2::Const::ITERATE"
.PP
One argument, occuring multiple times (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::ITERATE2\*(C'\fI\fR
.IX Subsection "Apache2::Const::ITERATE2"
.PP
Two arguments, the second occurs multiple times (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NO_ARGS\*(C'\fI\fR
.IX Subsection "Apache2::Const::NO_ARGS"
.PP
No arguments at all (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::RAW_ARGS\*(C'\fI\fR
.IX Subsection "Apache2::Const::RAW_ARGS"
.PP
The command will parse the command line itself (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE1\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE1"
.PP
One argument only (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE12\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE12"
.PP
One or two arguments (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE123\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE123"
.PP
One, two or three arguments (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE13\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE13"
.PP
One or three arguments (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE2\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE2"
.PP
Two arguments (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE23\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE23"
.PP
Two or three arguments (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::TAKE3\*(C'\fI\fR
.IX Subsection "Apache2::Const::TAKE3"
.PP
Three arguments (full
description).
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.ie n .Sh """:common"""
.el .Sh "\f(CW:common\fP"
.IX Subsection ":common"
.Vb 1
\&  use Apache2::Const \-compile => qw(:common);
.Ve
.PP
The \f(CW\*(C`:common\*(C'\fR group is for \s-1XXX\s0 constants.
.PP
\fI\f(CI\*(C`Apache2::Const::AUTH_REQUIRED\*(C'\fI\fR
.IX Subsection "Apache2::Const::AUTH_REQUIRED"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::DECLINED\*(C'\fI\fR
.IX Subsection "Apache2::Const::DECLINED"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::DONE\*(C'\fI\fR
.IX Subsection "Apache2::Const::DONE"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::FORBIDDEN\*(C'\fI\fR
.IX Subsection "Apache2::Const::FORBIDDEN"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_FOUND\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_FOUND"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::OK\*(C'\fI\fR
.IX Subsection "Apache2::Const::OK"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::REDIRECT\*(C'\fI\fR
.IX Subsection "Apache2::Const::REDIRECT"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::SERVER_ERROR\*(C'\fI\fR
.IX Subsection "Apache2::Const::SERVER_ERROR"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.ie n .Sh """:config"""
.el .Sh "\f(CW:config\fP"
.IX Subsection ":config"
.Vb 1
\&  use Apache2::Const \-compile => qw(:config);
.Ve
.PP
The \f(CW\*(C`:config\*(C'\fR group is for \s-1XXX\s0 constants.
.PP
\fI\f(CI\*(C`Apache2::Const::DECLINE_CMD\*(C'\fI\fR
.IX Subsection "Apache2::Const::DECLINE_CMD"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.ie n .Sh """:conn_keepalive"""
.el .Sh "\f(CW:conn_keepalive\fP"
.IX Subsection ":conn_keepalive"
.Vb 1
\&  use Apache2::Const \-compile => qw(:conn_keepalive);
.Ve
.PP
The \f(CW\*(C`:conn_keepalive\*(C'\fR constants group is used by the
(\f(CW\*(C`$c\->keepalive\*(C'\fR)
method.
.PP
\fI\f(CI\*(C`Apache2::Const::CONN_CLOSE\*(C'\fI\fR
.IX Subsection "Apache2::Const::CONN_CLOSE"
.PP
The connection will be closed at the end of the current \s-1HTTP\s0 request.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::CONN_KEEPALIVE\*(C'\fI\fR
.IX Subsection "Apache2::Const::CONN_KEEPALIVE"
.PP
The connection will be kept alive at the end of the current \s-1HTTP\s0 request.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::CONN_UNKNOWN\*(C'\fI\fR
.IX Subsection "Apache2::Const::CONN_UNKNOWN"
.PP
The connection is at an unknown state, e.g., initialized but not open
yet.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.ie n .Sh """:context"""
.el .Sh "\f(CW:context\fP"
.IX Subsection ":context"
.Vb 1
\&  use Apache2::Const \-compile => qw(:context);
.Ve
.PP
The \f(CW\*(C`:context\*(C'\fR group is used by the
\&\f(CW\*(C`$parms\->check_cmd_context\*(C'\fR
method.
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_IN_VIRTUALHOST\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_IN_VIRTUALHOST"
.PP
The command is not in a <VirtualHost> block.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_IN_LIMIT\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_IN_LIMIT"
.PP
The command is not in a <Limit> block.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_IN_DIRECTORY\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_IN_DIRECTORY"
.PP
The command is not in a <Directory> block.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_IN_LOCATION\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_IN_LOCATION"
.PP
The command is not in a <Location>/<LocationMatch> block.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_IN_FILES\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_IN_FILES"
.PP
The command is not in a <Files>/<FilesMatch> block.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::NOT_IN_DIR_LOC_FILE\*(C'\fI\fR
.IX Subsection "Apache2::Const::NOT_IN_DIR_LOC_FILE"
.PP
The command is not in a <Files>/<FilesMatch>, 
<Location>/<LocationMatch> or 
<Directory> block.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
\fI\f(CI\*(C`Apache2::Const::GLOBAL_ONLY\*(C'\fI\fR
.IX Subsection "Apache2::Const::GLOBAL_ONLY"
.PP