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.\" ========================================================================
.\"
.IX Title "libapache2-mod-perl2-2.0.11::docs::api::Apache2::Module 3pm"
.TH libapache2-mod-perl2-2.0.11::docs::api::Apache2::Module 3pm "2021-05-21" "perl v5.32.1" "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::Module \- Perl API for creating and working with Apache modules
.SH "Synopsis"
.IX Header "Synopsis"
.Vb 1
\&  use Apache2::Module ();
\&  
\&  #Define a configuration directive
\&  my @directives = (
\&      {
\&          name => \*(AqMyDirective\*(Aq,
\&      }
\&  );
\&  
\&  Apache2::Module::add(_\|_PACKAGE_\|_, \e@directives);
\&  
\&  # iterate over the whole module list
\&  for (my $modp = Apache2::Module::top_module(); $modp; $modp = $modp\->next) {
\&      my $name                  = $modp\->name;
\&      my $index                 = $modp\->module_index;
\&      my $ap_api_major_version  = $modp\->ap_api_major_version;
\&      my $ap_api_minor_version  = $modp\->ap_api_minor_version;
\&      my $commands              = $modp\->cmds;
\&  }
\&  
\&  # find a specific module
\&  my $module = Apache2::Module::find_linked_module(\*(Aqmod_ssl.c\*(Aq);
\&  
\&  # remove a specific module
\&  $module\->remove_loaded_module();
\&  
\&  # access module configuration from a directive
\&  sub MyDirective {
\&      my ($self, $parms, $args) = @_;
\&      my  $srv_cfg = Apache2::Module::get_config($self, $parms\->server);
\&      [...]
\&  }
\&  
\&  # test if an Apache module is loaded
\&  if (Apache2::Module::loaded(\*(Aqmod_ssl.c\*(Aq)) {
\&      [...]
\&  }
\&  
\&  # test if a Perl module is loaded
\&  if (Apache2::Module::loaded(\*(AqApache2::Status\*(Aq)) {
\&      [...]
\&  }
.Ve
.SH "Description"
.IX Header "Description"
\&\f(CW\*(C`Apache2::Module\*(C'\fR provides the Perl \s-1API\s0 for creating and working with
Apache modules
.PP
See Apache Server Configuration Customization in
Perl.
.SH "API"
.IX Header "API"
\&\f(CW\*(C`Apache2::Module\*(C'\fR provides the following functions and/or methods:
.ie n .SS """add"""
.el .SS "\f(CWadd\fP"
.IX Subsection "add"
Add a module's custom configuration directive to Apache.
.PP
.Vb 1
\&  Apache2::Module::add($package, $cmds);
.Ve
.ie n .IP "arg1: $package ( string )" 4
.el .IP "arg1: \f(CW$package\fR ( string )" 4
.IX Item "arg1: $package ( string )"
the package of the module to add
.ie n .IP "arg2: $cmds ( \s-1ARRAY\s0 of \s-1HASH\s0 refs )" 4
.el .IP "arg2: \f(CW$cmds\fR ( \s-1ARRAY\s0 of \s-1HASH\s0 refs )" 4
.IX Item "arg2: $cmds ( ARRAY of HASH refs )"
the list of configuration directives to add
.IP "ret: no return value" 4
.IX Item "ret: no return value"
.PD 0
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP
See also Apache Server Configuration Customization in
Perl.
.ie n .SS """ap_api_major_version"""
.el .SS "\f(CWap_api_major_version\fP"
.IX Subsection "ap_api_major_version"
Get the httpd \s-1API\s0 version this module was build against, \fBnot\fR the
module's version.
.PP
.Vb 1
\&  $major_version = $module\->ap_api_major_version();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "ret: $major_version ( integer )" 4
.el .IP "ret: \f(CW$major_version\fR ( integer )" 4
.IX Item "ret: $major_version ( integer )"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP
This methid is used to check that module is compatible with this
version of the server before loading it.
.ie n .SS """ap_api_minor_version"""
.el .SS "\f(CWap_api_minor_version\fP"
.IX Subsection "ap_api_minor_version"
Get the module \s-1API\s0 minor version.
.PP
.Vb 1
\&  $minor_version = $module\->ap_api_minor_version();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "ret: $minor_version ( integer )" 4
.el .IP "ret: \f(CW$minor_version\fR ( integer )" 4
.IX Item "ret: $minor_version ( integer )"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP
\&\f(CW\*(C`ap_api_minor_version()\*(C'\fR provides \s-1API\s0 feature milestones.
.PP
It's not checked during module init.
.ie n .SS """cmds"""
.el .SS "\f(CWcmds\fP"
.IX Subsection "cmds"
Get the \f(CW\*(C`Apache2::Command\*(C'\fR object,
describing all of the directives this module defines.
.PP
.Vb 1
\&  $command = $module\->cmds();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "ret: $command ( ""Apache2::Command object"" )" 4
.el .IP "ret: \f(CW$command\fR ( \f(CWApache2::Command object\fR )" 4
.IX Item "ret: $command ( Apache2::Command object )"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.ie n .SS """get_config"""
.el .SS "\f(CWget_config\fP"
.IX Subsection "get_config"
Retrieve a module's configuration. Used by configuration directives.
.PP
.Vb 4
\&  $cfg = Apache2::Module::get_config($class, $server, $dir_config);
\&  $cfg = Apache2::Module::get_config($class, $server);
\&  $cfg =          $self\->get_config($server, $dir_config);
\&  $cfg =          $self\->get_config($server);
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "arg1: $class ( string )" 4
.el .IP "arg1: \f(CW$class\fR ( string )" 4
.IX Item "arg1: $class ( string )"
.PD
The Perl package this configuration is for
.ie n .IP "arg2: $server ( ""Apache2::ServerRec object"" )" 4
.el .IP "arg2: \f(CW$server\fR ( \f(CWApache2::ServerRec object\fR )" 4
.IX Item "arg2: $server ( Apache2::ServerRec object )"
The current server, typically
\&\f(CW\*(C`$r\->server\*(C'\fR or
\&\f(CW\*(C`$parms\->server\*(C'\fR.
.ie n .IP "opt arg3: $dir_config ( ""Apache2::ConfVector object"" )" 4
.el .IP "opt arg3: \f(CW$dir_config\fR ( \f(CWApache2::ConfVector object\fR )" 4
.IX Item "opt arg3: $dir_config ( Apache2::ConfVector object )"
By default, the configuration returned is the server level one. To
retrieve the per directory configuration, use
\&\f(CW\*(C`$r\->per_dir_config\*(C'\fR as a
last argument.
.ie n .IP "ret: $cfg (\s-1HASH\s0 reference)" 4
.el .IP "ret: \f(CW$cfg\fR (\s-1HASH\s0 reference)" 4
.IX Item "ret: $cfg (HASH reference)"
A reference to the hash holding the module configuration data.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
See also Apache Server Configuration Customization in
Perl.
.ie n .SS """find_linked_module"""
.el .SS "\f(CWfind_linked_module\fP"
.IX Subsection "find_linked_module"
Find a module based on the name of the module
.PP
.Vb 1
\&  $module = Apache2::Module::find_linked_module($name);
.Ve
.ie n .IP "arg1: $name ( string )" 4
.el .IP "arg1: \f(CW$name\fR ( string )" 4
.IX Item "arg1: $name ( string )"
The name of the module ending in \f(CW\*(C`.c\*(C'\fR
.ie n .IP "ret: $module ( ""Apache2::Module object"" )" 4
.el .IP "ret: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "ret: $module ( Apache2::Module object )"
The module object if found, \f(CW\*(C`undef\*(C'\fR otherwise.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
For example:
.PP
.Vb 1
\&  my $module = Apache2::Module::find_linked_module(\*(Aqmod_ssl.c\*(Aq);
.Ve
.ie n .SS """loaded"""
.el .SS "\f(CWloaded\fP"
.IX Subsection "loaded"
Determine if a certain module is loaded
.PP
.Vb 1
\&  $loaded = Apache2::Module::loaded($module);
.Ve
.ie n .IP "name: $module ( string )" 4
.el .IP "name: \f(CW$module\fR ( string )" 4
.IX Item "name: $module ( string )"
The name of the module to search for.
.Sp
If \f(CW$module\fR ends with \f(CW\*(C`.c\*(C'\fR, search all the modules, statically
compiled and dynamically loaded.
.Sp
If \f(CW$module\fR ends with \f(CW\*(C`.so\*(C'\fR, search only the dynamically loaded
modules.
.Sp
If \f(CW$module\fR doesn't contain a \f(CW\*(C`.\*(C'\fR, search the loaded Perl modules
(checks \f(CW%INC\fR).
.ie n .IP "ret: $loaded ( boolean )" 4
.el .IP "ret: \f(CW$loaded\fR ( boolean )" 4
.IX Item "ret: $loaded ( boolean )"
Returns true if the module is loaded, false otherwise.
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PP
For example, to test if this server supports ssl:
.PP
.Vb 3
\&  if (Apache2::Module::loaded(\*(Aqmod_ssl.c\*(Aq)) {
\&      [...]
\&  }
.Ve
.PP
To test is this server dynamically loaded mod_perl:
.PP
.Vb 3
\&  if (Apache2::Module::loaded(\*(Aqmod_perl.so\*(Aq)) {
\&      [...]
\&  }
.Ve
.PP
To test if \f(CW\*(C`Apache2::Status\*(C'\fR is
loaded:
.PP
.Vb 3
\&  if (Apache2::Module::loaded(\*(AqApache2::Status\*(Aq)) {
\&      [...]
\&  }
.Ve
.ie n .SS """module_index"""
.el .SS "\f(CWmodule_index\fP"
.IX Subsection "module_index"
Get the index to this modules structures in config vectors.
.PP
.Vb 1
\&  $index = $module\->module_index();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "ret: $index ( integer )" 4
.el .IP "ret: \f(CW$index\fR ( integer )" 4
.IX Item "ret: $index ( integer )"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.ie n .SS """name"""
.el .SS "\f(CWname\fP"
.IX Subsection "name"
Get the name of the module's \fI.c\fR file
.PP
.Vb 1
\&  $name = $module\->name();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "ret: $name ( string )" 4
.el .IP "ret: \f(CW$name\fR ( string )" 4
.IX Item "ret: $name ( string )"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.PP
For example a mod_perl module, will return: \fImod_perl.c\fR.
.ie n .SS """next"""
.el .SS "\f(CWnext\fP"
.IX Subsection "next"
Get the next module in the list, \f(CW\*(C`undef\*(C'\fR if this is the last module
in the list.
.PP
.Vb 1
\&  $next_module = $module\->next();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.ie n .IP "ret: $next_module ( ""Apache2::Module object"" )" 4
.el .IP "ret: \f(CW$next_module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "ret: $next_module ( Apache2::Module object )"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.ie n .SS """remove_loaded_module"""
.el .SS "\f(CWremove_loaded_module\fP"
.IX Subsection "remove_loaded_module"
Remove a module from the list of loaded modules permanently.
.PP
.Vb 1
\&  $module\->remove_loaded_module();
.Ve
.ie n .IP "obj: $module ( ""Apache2::Module object"" )" 4
.el .IP "obj: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "obj: $module ( Apache2::Module object )"
.PD 0
.IP "ret: no return value" 4
.IX Item "ret: no return value"
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.ie n .SS """top_module"""
.el .SS "\f(CWtop_module\fP"
.IX Subsection "top_module"
Returns the first module in the module list. Useful to start a
module iteration.
.PP
.Vb 1
\&  $module = Apache2::Module::top_module();
.Ve
.ie n .IP "ret: $module ( ""Apache2::Module object"" )" 4
.el .IP "ret: \f(CW$module\fR ( \f(CWApache2::Module object\fR )" 4
.IX Item "ret: $module ( Apache2::Module object )"
.PD 0
.IP "since: 2.0.00" 4
.IX Item "since: 2.0.00"
.PD
.SH "See Also"
.IX Header "See Also"
mod_perl 2.0 documentation.
.SH "Copyright"
.IX Header "Copyright"
mod_perl 2.0 and its core modules are copyrighted under
The Apache Software License, Version 2.0.
.SH "Authors"
.IX Header "Authors"
The mod_perl development team and numerous
contributors.