NAME
    POE::Component::Server::SOAP - publish POE event handlers via SOAP over
    HTTP

SYNOPSIS
            use POE;
            use POE::Component::Server::SOAP;

            POE::Component::Server::SOAP->new(
                    'ALIAS'         =>      'MySOAP',
                    'ADDRESS'       =>      'localhost',
                    'PORT'          =>      32080,
                    'HOSTNAME'      =>      'MyHost.com',
            );

            POE::Session->create(
                    'inline_states' =>      {
                            '_start'        =>      \&setup_service,
                            '_stop'         =>      \&shutdown_service,
                            'Sum_Things'    =>      \&do_sum,
                    },
            );

            $poe_kernel->run;
            exit 0;

            sub setup_service {
                    my $kernel = $_[KERNEL];
                    $kernel->alias_set( 'MyServer' );
                    $kernel->post( 'MySOAP', 'ADDMETHOD', 'MyServer', 'Sum_Things' );
            }

            sub shutdown_service {
                    $_[KERNEL]->post( 'MySOAP', 'DELMETHOD', 'MyServer', 'Sum_Things' );
            }

            sub do_sum {
                    my $response = $_[ARG0];
                    my $params = $response->soapbody;
                    my $sum = 0;
                    while (my ($field, $value) = each(%$params)) {
                            $sum += $value;
                    }

                    # Fake an error
                    if ( $sum < 100 ) {
                            $_[KERNEL]->post( 'MySOAP', 'FAULT', $response, 'Client.Add.Error', 'The sum must be above 100' );
                    } else {
                            # Add the content
                            $response->content( "Thanks.  Sum is: $sum" );
                            $_[KERNEL]->post( 'MySOAP', 'DONE', $response );
                    }
            }

ABSTRACT
            An easy to use SOAP/1.1 daemon for POE-enabled programs

DESCRIPTION
    This module makes serving SOAP/1.1 requests a breeze in POE.

    The hardest thing to understand in this module is the SOAP Body. That's
    it!

    The standard way to use this module is to do this:

            use POE;
            use POE::Component::Server::SOAP;

            POE::Component::Server::SOAP->new( ... );

            POE::Session->create( ... );

            POE::Kernel->run();

    POE::Component::Server::SOAP is a bolt-on component that can publish
    event handlers via SOAP over HTTP. Currently, this module only supports
    SOAP/1.1 requests, work will be done in the future to support SOAP/1.2
    requests. The HTTP server is done via
    POE::Component::Server::SimpleHTTP.

  Starting Server::SOAP
    To start Server::SOAP, just call it's new method:

            POE::Component::Server::SOAP->new(
                    'ALIAS'         =>      'MySOAP',
                    'ADDRESS'       =>      '192.168.1.1',
                    'PORT'          =>      11111,
                    'HOSTNAME'      =>      'MySite.com',
                    'HEADERS'       =>      {},
            );

    This method will die on error or return success.

    This constructor accepts only 7 options.

    "ALIAS"
        This will set the alias Server::SOAP uses in the POE Kernel. This
        will default to "SOAPServer"

    "ADDRESS"
        This value will be passed to POE::Component::Server::SimpleHTTP to
        bind to.

        Examples: ADDRESS => 0 # Bind to all addresses + localhost ADDRESS
        => 'localhost' # Bind to localhost ADDRESS => '192.168.1.1' # Bind
        to specified IP

    "PORT"
        This value will be passed to POE::Component::Server::SimpleHTTP to
        bind to.

    "HOSTNAME"
        This value is for the HTTP::Request's URI to point to. If this is
        not supplied, POE::Component::Server::SimpleHTTP will use
        Sys::Hostname to find it.

    "HEADERS"
        This should be a hashref, that will become the default headers on
        all HTTP::Response objects. You can override this in individual
        requests by setting it via $response->header( ... )

        The default header is: Server => 'POE::Component::Server::SOAP/' .
        $VERSION

        For more information, consult the HTTP::Headers module.

    "MUSTUNDERSTAND"
        This is a boolean value, controlling whether Server::SOAP will check
        for this value in the Headers and Fault if it is present. This will
        default to true.

    "SIMPLEHTTP"
        This allows you to pass options to the SimpleHTTP backend. One of
        the real reasons is to support SSL in Server::SOAP, yay! To learn
        how to use SSL, please consult the
        POE::Component::Server::SimpleHTTP documentation. Of course, you
        could totally screw up things, just use this with caution :)

        You must pass a hash reference as the value, because it will be
        expanded and put in the Server::SimpleHTTP->new() constructor.

  Events
    There are only a few ways to communicate with Server::SOAP.

    "ADDMETHOD"
                This event accepts four arguments:
                        - The intended session alias
                        - The intended session event
                        - The public service name       ( not required -> defaults to session alias )
                        - The public method name        ( not required -> defaults to session event )

                Calling this event will add the method to the registry.

                NOTE: This will overwrite the old definition of a method if it exists!

    "DELMETHOD"
                This event accepts two arguments:
                        - The service name
                        - The method name

                Calling this event will remove the method from the registry.

                NOTE: if the service now contains no methods, it will also be removed.

    "DELSERVICE"
                This event accepts one argument:
                        - The service name

                Calling this event will remove the entire service from the registry.

    "DONE"
                This event accepts only one argument: the SOAP::Response object we sent to the handler.

                Calling this event implies that this particular request is done, and will proceed to close the socket.

                The content in $response->content() will be automatically serialized via SOAP::Lite's SOAP::Serializer

                NOTE: This method automatically sets some parameters:
                        - HTTP Status = 200 ( if not defined )
                        - HTTP Header value of 'Content-Type' = 'text/xml'

                To get greater throughput and response time, do not post() to the DONE event, call() it!
                However, this will force your program to block while servicing SOAP requests...

    "RAWDONE"
                This event accepts only one argument: the SOAP::Response object we sent to the handler.

                Calling this event implies that this particular request is done, and will proceed to close the socket.

                The only difference between this and the DONE event is that the content in $response->content() will not
                be serialized and passed through intact to the SOAP envelope. This is useful if you generate the xml yourself.

                NOTE:
                        - The xml content does not need to have a <?xml version="1.0" encoding="UTF-8"> header
                        - In SOAP::Lite, the client sees '<foo>54</foo><bar>89</bar>' as '54' only!
                                The solution is to enclose the xml in another name, i.e. '<data><foo>54</foo><bar>89</bar></data>'
                        - If the xml is malformed or is not escaped properly, the client will get terribly confused!

                It will be inserted here:
                        ...<soap:Body><namesp4:TestResponse xmlns:namesp4="http://localhost:32080/">YOURSTUFFHERE</namesp4:TestResponse></soap:Body>...

    "FAULT"
                This event accepts five arguments:
                        - the HTTP::Response object we sent to the handler
                        - SOAP Fault Code       ( not required -> defaults to 'Server' )
                        - SOAP Fault String     ( not required -> defaults to 'Application Faulted' )
                        - SOAP Fault Detail     ( not required )
                        - SOAP Fault Actor      ( not required )

                Again, calling this event implies that this particular request is done, and will proceed to close the socket.

                Calling this event will generate a SOAP Fault and return it to the client.

                NOTE: This method automatically sets some parameters:
                        - HTTP Status = 500 ( if not defined )
                        - HTTP Header value of 'Content-Type' = 'text/xml'
                        - HTTP Content = SOAP Envelope of the fault ( overwriting anything that was there )

    "RAWFAULT"
                This event accepts only one argument: the SOAP::Response object we sent to the handler.

                Calling this event implies that this particular request is done, and will proceed to close the socket.

                The only difference between this and the FAULT event is that you are given freedom to create your own xml for the
                fault. It will be passed through intact to the SOAP envelope. Be sure to read the SOAP specs :)

                This is very similar to the RAWDONE event, so go read the notes up there!

                It will be inserted here:
                        ...<soap:Body>YOURSTUFFHERE</soap:Body>...

    "CLOSE"
                This event accepts only one argument: the SOAP::Response object we sent to the handler.

                Calling this event will proceed to close the socket, not sending any output.

    "STARTLISTEN"
                Starts the listening socket, if it was shut down

    "STOPLISTEN"
                Simply a wrapper for SHUTDOWN GRACEFUL, but will not shutdown Server::SOAP if there is no more requests

    "SHUTDOWN"
                Without arguments, Server::SOAP does this:
                        Close the listening socket
                        Kills all pending requests by closing their sockets
                        Removes it's alias

                With an argument of 'GRACEFUL', Server::SOAP does this:
                        Close the listening socket
                        Waits for all pending requests to come in via DONE/FAULT/CLOSE, then removes it's alias

  Processing Requests
    if you're new to the world of SOAP, reading the documentation by the
    excellent author of SOAP::Lite is recommended! It also would help to
    read some stuff at http://www.soapware.org/ -> they have some excellent
    links :)

    Now, once you have set up the services/methods, what do you expect from
    Server::SOAP? Every request is pretty straightforward, you just get a
    Server::SOAP::Response object in ARG0.

            The Server::SOAP::Response object contains a wealth of information about the specified request:
                    - There is the SimpleHTTP::Connection object, which gives you connection information
                    - There is the various SOAP accessors provided via Server::SOAP::Response
                    - There is the HTTP::Request object

            Example information you can get:
                    $response->connection->remote_ip()      # IP of the client
                    $response->soaprequest->uri()           # Original URI
                    $response->soapmethod()                 # The SOAP method that was called
                    $response->soapbody()                   # The arguments to the method

    Probably the most important part of SOAP::Response is the body of the
    message, which contains the arguments to the method call. The data in
    the body is a hash, for more information look at SOAP::Lite ->
    SOAP::Deserializer.

    I cannot guarantee what will be in the body, it is all up to the SOAP
    serializer/deserializer. I can provide some examples:

            NOTE: It is much easier to play around with parameters if they are properly encoded.
            If you are using SOAP::Lite, make extensive use of SOAP::Data->name() to create parameters :)

            Calling a SOAP method with no arguments:
                    print SOAP::Lite
                            -> uri('http://localhost:32080/')
                            -> proxy('http://localhost:32080/?session=MyServer')
                            -> Sum_Things()
                            -> result

            The body will look like this:
                    $VAR1 = undef;

            Calling a SOAP method with multiple arguments:
                    print SOAP::Lite
                            -> uri('http://localhost:32080/')
                            -> proxy('http://localhost:32080/?session=MyServer')
                            -> Sum_Things( 8, 6, 7, 5, 3, 0, 9, 183 )
                            -> result

            The body will look like this:
                    $VAR1 = {
                            'c-gensym17' => '183',
                            'c-gensym5' => '6',
                            'c-gensym13' => '0',
                            'c-gensym11' => '3',
                            'c-gensym15' => '9',
                            'c-gensym9' => '5',
                            'c-gensym3' => '8',
                            'c-gensym7' => '7'
                    };

                    NOTE: The original array ordering can be received by sorting on the keys.

            Calling a SOAP method with an arrayref
                    print SOAP::Lite
                            -> uri('http://localhost:32080/')
                            -> proxy('http://localhost:32080/?session=MyServer')
                            -> Sum_Things(
                                    [ 8, 6, 7, 5, 3, 0, 9, 183 ]
                                    )
                            -> result

            The body will look like this:
                    $VAR1 = {
                            'Array' => [
                                    '8',
                                    '6',
                                    '7',
                                    '5',
                                    '3',
                                    '0',
                                    '9',
                                    '183'
                            ]
                    };

            Calling a SOAP method with a hash:
                    print SOAP::Lite
                            -> uri('http://localhost:32080/')
                            -> proxy('http://localhost:32080/?session=MyServer')
                            -> Sum_Things(  {
                                    'FOO'   =>      'bax',
                                    'Hello' =>      'World!',
                            }       )
                            -> result

            The body will look like this:
                    $VAR1 = {
                            'c-gensym21' => {
                                    'Hello' => 'World!',
                                    'FOO' => 'bax',
                            }
                    };

            Calling a SOAP method using SOAP::Data methods:
                    print SOAP::Lite
                            -> uri('http://localhost:32080/')
                            -> proxy('http://localhost:32080/?session=MyServer')
                            -> Sum_Things(
                                    SOAP::Data->name( 'Foo', 'harz' ),
                                    SOAP::Data->name( 'Param', 'value' ),
                            )-> result

            The body will look like this:
                    $VAR1 = {
                            'Param' => 'value',
                            'Foo' => 'harz'
                    };

    Simply experiment using Data::Dumper and you'll quickly get the hang of
    it!

    When you're done with the SOAP request, stuff whatever output you have
    into the content of the response object.

            $response->content( 'The result is ... ' );

    The only thing left to do is send it off to the DONE event :)

            $_[KERNEL]->post( 'MySOAP', 'DONE', $response );

    If there's an error, you can send it to the FAULT event, which will
    convert it into a SOAP fault.

            # See this website for more details about what "SOAP Fault" is :)
            # http://www.w3.org/TR/2000/NOTE-SOAP-20000508/#_Toc478383507

            $_[KERNEL]->post( 'MySOAP', 'FAULT', $response, 'Client.Authentication', 'Invalid password' );

  Server::SOAP Notes
    This module is very picky about capitalization!

    All of the options are uppercase, to avoid confusion.

    You can enable debugging mode by doing this:

            sub POE::Component::Server::SOAP::DEBUG () { 1 }
            use POE::Component::Server::SOAP;

    In the case you want to see the raw xml being received/sent to the
    client, set DEBUG to 2.

    Yes, I broke a lot of things in the release ( 1.01 ), but Rocco agreed
    that it's best to break things as early as possible, so that development
    can move on instead of being stuck on legacy issues.

  Using SSL
    So you want to use SSL in Server::SOAP? Here's a example on how to do
    it:

            POE::Component::Server::SOAP->new(
                    ...
                    'SIMPLEHTTP'    =>      {
                            'SSLKEYCERT'    =>      [ 'public-key.pem', 'public-cert.pem' ],
                    },
            );

            # And that's it provided you've already created the necessary key + certificate file :)

    Ah, to use SSL in SOAP::Lite, simply use https://blah.com instead of
    http://blah.com

SEE ALSO
            The examples directory that came with this component.

            L<POE>

            L<HTTP::Response>

            L<HTTP::Request>

            L<POE::Component::Server::SOAP::Response>

            L<POE::Component::Server::SimpleHTTP>

            L<SOAP::Lite>

            L<POE::Component::SSLify>

AUTHOR
    Apocalypse <apocal@cpan.org>

    I took over this module from Rocco Caputo. Here is his stuff:

            POE::Component::Server::SOAP is Copyright 2002 by Rocco Caputo.  All
            rights are reserved.  POE::Component::Server::SOAP is free software;
            you may redistribute it and/or modify it under the same terms as Perl
            itself.

            Rocco may be contacted by e-mail via rcaputo@cpan.org.

COPYRIGHT AND LICENSE
    Copyright 2008 by Apocalypse

    This library is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.