DOKK / manpages / debian 12 / liblemonldap-ng-common-perl / Lemonldap::NG::Common::PSGI::Router.3pm.en
Lemonldap::NG::Common::PSGI::Router(3pm) User Contributed Perl Documentation Lemonldap::NG::Common::PSGI::Router(3pm)

Lemonldap::NG::Common::PSGI::Router - Base library for REST APIs of Lemonldap::NG.

  package My::PSGI;
  
  use base Lemonldap::NG::Common::PSGI::Router;
  
  sub init {
    my ($self,$args) = @_;
    # Will be called 1 time during startup
    
    # Declare REST routes (could be HTML templates or methods)
    $self->addRoute ( 'index.html', undef, ['GET'] )
         ->addRoute ( books => { ':book' => 'booksMethod' }, ['GET', 'POST'] )
         ->addRoute ( properties => { '*' => 'propertiesMethod' }, ['GET', 'POST', 'PUT', 'DELETE']);
  
    # Default route (ie: PATH_INFO == '/')
    $self->defaultRoute('index.html');
  
    # See Lemonldap::NG::Common::PSGI for other options
  
    # Return a boolean. If false, then error message has to be stored in
    # $self->error
    return 1;
  }
  
  sub booksMethod {
    my ( $self, $req, @otherPathInfo ) = @_;
    my $book = $req->params('book');
    my $method = $req->method;
    ...
    $self->sendJSONresponse(...);
  }
  
  sub propertiesMethod {
    my ( $self, $property, @otherPathInfo ) = @_;
    my $method = $req->method;
    ...
    $self->sendJSONresponse(...);
  }

This package could then be called as a CGI, using FastCGI,...

  #!/usr/bin/env perl
  
  use My::PSGI;
  use Plack::Handler::FCGI; # or Plack::Handler::CGI
  Plack::Handler::FCGI->new->run( My::PSGI->run() );

This package provides base class for Lemonldap::NG REST API but could be used regardless.

See Lemonldap::NG::Common::PSGI for logging methods, content sending,...

addRoute ( $word, $dest, $methods )

Declare a REST route. Arguments:

$word:
the first word of /path/info.
$dest:
string, sub ref or hash ref (see "Route types" below)
$methods:
array ref containing the methods concerned by this route.

Route types

As seen in "SYNOPSIS", you can declare routes with variable component. $dest can be:

the name of the method to call
$word is used as $dest
an anonymous subroutin to call
it's a recursive call to `{ $word => $dest }`
in this case each element of the array will be considered as `{ $element => $element }`. So each element must be a word that makes a correspondence between a path_info word and a subroutine

Some special $word:

':name':
the word in path_info will be stored in GET parameters
'*':
the subroutine will be called with the word of path_info as second argument (after $req)
'something.html':
if $word finishes with '.html', and $dest is undef, then sendHtml() will be called with 'something.tpl' as template name.

Examples:

  $self->addRoute( books => { ':bookId' => 'book' }, ['GET'] );

bookId parameter will be stored in $req->params('bookId');

  $self->addRoute( books => { ':bookId' => { pages => { ':pageId' => 'page' } } }, ['GET'] );
    
  $self->addRoute( books => { ':bookId' => { pages => { ':pageId' => 'page' } } }, ['GET'] )
       ->addRoute( books => { ':bookId' => { '*' => 'book' } }, ['GET'] );

Note that book() will be called for any path_info containing /books/<$bookid>/<$other> except if $other == 'pages'.

  $self->addRoute( properties => [ 'p1', 'p2' ] );

defaultRoute($path)

This method defined which path_info to use if path_info is '/' or empty.

See Lemonldap::NG::Common::PSGI for inherited accessors (error, languages, logLevel, staticPrefix, templateDir, links, syslog).

<http://lemonldap-ng.org/>, Lemonldap::NG::Portal, Lemonldap::NG::Handler, Plack, PSGI, Lemonldap::NG::Common::PSGI, Lemonldap::NG::Common::PSGI::Request, HTML::Template,

Use OW2 system to report bug or ask for features: <https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/issues>

Lemonldap::NG is available at <https://lemonldap-ng.org/download>

See COPYING file for details.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

2023-09-29 perl v5.36.0