src::mod_perl::docs::api::Apache2::Module(3)

NAME
Apache2::Module - Perl API for creating and working with Apache modules

Synopsis
  use Apache2::Module ();

  #Define a configuration directive
  my @directives = (
      {
          name => 'MyDirective',
      }
  );

  Apache2::Module::add(__PACKAGE__, \@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('mod_ssl.c');

  # 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('mod_ssl.c')) {
      [...]
  }

  # test if a Perl module is loaded
  if (Apache2::Module::loaded('Apache2::Status')) {
      [...]
  }

Description
"Apache2::Module" provides the Perl API for creating and working with Apache modules

See Apache Server Configuration Customization in Perl.

API
"Apache2::Module" provides the following functions and/or methods:

  "add"
Add a module's custom configuration directive to Apache.

  Apache2::Module::add($package, $cmds);

arg1: $package ( string )
    the package of the module to add

arg2: $cmds ( ARRAY of HASH refs )
    the list of configuration directives to add

ret: no return value
since: 2.0.00

See also Apache Server Configuration Customization in Perl.

  "ap_api_major_version"
Get the httpd API version this module was build against, not the module's version.

  $major_version = $module->ap_api_major_version();

obj: $module ( "Apache2::Module object" )
ret: $major_version ( integer )
since: 2.0.00

This methid is used to check that module is compatible with this version of the server before loading it.

  "ap_api_minor_version"
Get the module API minor version.

  $minor_version = $module->ap_api_minor_version();

obj: $module ( "Apache2::Module object" )
ret: $minor_version ( integer )
since: 2.0.00

"ap_api_minor_version()" provides API feature milestones.

It's not checked during module init.

  "cmds"
Get the "Apache2::Command" object, describing all of the directives this module defines.

  $command = $module->cmds();

obj: $module ( "Apache2::Module object" )
ret: $command ( "Apache2::Command object" )
since: 2.0.00

  "get_config"
Retrieve a module's configuration. Used by configuration directives.

  $cfg = Apache2::Module::get_config($class, $server, $dir_config);
  $cfg = Apache2::Module::get_config($class, $server);
  $cfg =          $self->get_config($server, $dir_config);
  $cfg =          $self->get_config($server);

obj: $module ( "Apache2::Module object" )
arg1: $class ( string )
    The Perl package this configuration is for

arg2: $server ( "Apache2::ServerRec object" )
    The current server, typically "$r->server" or "$parms->server".

opt arg3: $dir_config ( "Apache2::ConfVector object" )
    By default, the configuration returned is the server level one. To retrieve the per directory configuration, use "$r->per_dir_config" as a last argument.

ret: $cfg (HASH reference)
    A reference to the hash holding the module configuration data.

since: 2.0.00

See also Apache Server Configuration Customization in Perl.

  "find_linked_module"
Find a module based on the name of the module

  $module = Apache2::Module::find_linked_module($name);

arg1: $name ( string )
    The name of the module ending in ".c"

ret: $module ( "Apache2::Module object" )
    The module object if found, "undef" otherwise.

since: 2.0.00

For example:

  my $module = Apache2::Module::find_linked_module('mod_ssl.c');

  "loaded"
Determine if a certain module is loaded

  $loaded = Apache2::Module::loaded($module);

name: $module ( string )
    The name of the module to search for.

    If $module ends with ".c", search all the modules, statically compiled and dynamically loaded.

    If $module ends with ".so", search only the dynamically loaded modules.

    If $module doesn't contain a ".", search the loaded Perl modules (checks %INC).

ret: $loaded ( boolean )
    Returns true if the module is loaded, false otherwise.

since: 2.0.00

For example, to test if this server supports ssl:

  if (Apache2::Module::loaded('mod_ssl.c')) {
      [...]
  }

To test is this server dynamically loaded mod_perl:

  if (Apache2::Module::loaded('mod_perl.so')) {
      [...]
  }

To test if "Apache2::Status" is loaded:

  if (Apache2::Module::loaded('Apache2::Status')) {
      [...]
  }

  "module_index"
Get the index to this modules structures in config vectors.

  $index = $module->module_index();

obj: $module ( "Apache2::Module object" )
ret: $index ( integer )
since: 2.0.00

  "name"
Get the name of the module's .c file

  $name = $module->name();

obj: $module ( "Apache2::Module object" )
ret: $name ( string )
since: 2.0.00

For example a mod_perl module, will return: mod_perl.c.

  "next"
Get the next module in the list, "undef" if this is the last module in the list.

  $next_module = $module->next();

obj: $module ( "Apache2::Module object" )
ret: $next_module ( "Apache2::Module object" )
since: 2.0.00

  "remove_loaded_module"
Remove a module from the list of loaded modules permanently.

  $module->remove_loaded_module();

obj: $module ( "Apache2::Module object" )
ret: no return value
since: 2.0.00

  "top_module"
Returns the first module in the module list. Usefull to start a module iteration.

  $module = Apache2::Module::top_module();

ret: $module ( "Apache2::Module object" )
since: 2.0.00

See Also
mod_perl 2.0 documentation.

Copyright
mod_perl 2.0 and its core modules are copyrighted under The Apache Software License, Version 2.0.

Authors
The mod_perl development team and numerous contributors.