package SOAP::WSDL::Client;
use strict;
use warnings;
use Carp;

use Class::Std::Fast::Storable;
use Scalar::Util qw(blessed);

use SOAP::WSDL::Factory::Deserializer;
use SOAP::WSDL::Factory::Serializer;
use SOAP::WSDL::Factory::Transport;
use SOAP::WSDL::Expat::MessageParser;

use version; our $VERSION = qv('2.00.03');

my %class_resolver_of   :ATTR(:name<class_resolver> :default<()>);
my %no_dispatch_of      :ATTR(:name<no_dispatch>    :default<()>);
my %prefix_of           :ATTR(:name<prefix>         :default<()>);
my %outputxml_of        :ATTR(:name<outputxml>      :default<()>);
my %transport_of        :ATTR(:name<transport>      :default<()>);
my %endpoint_of         :ATTR(:name<endpoint>       :default<()>);

my %soap_version_of     :ATTR(:get<soap_version>    :init_attr<soap_version> :default<'1.1'>);

my %on_action_of        :ATTR(:name<on_action>      :default<()>);
my %content_type_of     :ATTR(:name<content_type>   :default<text/xml; charset=utf8>);  #/#trick editors
my %serializer_of       :ATTR(:name<serializer>     :default<()>);
my %deserializer_of     :ATTR(:name<deserializer>   :default<()>);

sub BUILD {
    my ($self, $ident, $attrs_of_ref) = @_;

    if (exists $attrs_of_ref->{ proxy }) {
        $self->set_proxy( $attrs_of_ref->{ proxy } );
        delete $attrs_of_ref->{ proxy };
    }
    return;
}

sub get_proxy {                         ## no critic RequireArgUnpacking
    return $_[0]->get_transport();
}

sub set_proxy {
    my ($self, @args_from) = @_;
    my $ident = ${ $self };

    # remember old value to return it later - Class::Std does so, too
    my $old_value = $transport_of{ $ident };

    # accept both list and list ref args
    @args_from =  @{ $args_from[0] } if ref $args_from[0];

    # remember endpoint
    $endpoint_of{ $ident } = $args_from[0];

    # set transport - SOAP::Lite works similar...
    $transport_of{ $ident } =  SOAP::WSDL::Factory::Transport
      ->get_transport( @args_from );

    return $old_value;
}

sub set_soap_version {
    my $ident = ${ $_[0] };

    # remember old value to return it later - Class::Std does so, too
    my $soap_version = $soap_version_of{ $ident };

    # re-setting the soap version invalidates the
    # serializer object
    delete $serializer_of{ $ident };
    delete $deserializer_of{ $ident };

    $soap_version_of{ $ident } = $_[1];

    return $soap_version;
}

# Mimic SOAP::Lite's behaviour for getter/setter routines
SUBFACTORY: {
    for (qw(class_resolver no_dispatch outputxml proxy prefix)) {
        my $setter = "set_$_";
        my $getter = "get_$_";
        no strict qw(refs);     ## no critic ProhibitNoStrict
        *{ $_ } = sub { my $self = shift;
            if (@_) {
                $self->$setter(@_);
                return $self;
            }
            return $self->$getter()
        };
    }
}

sub call {
    my ($self, $method, @data_from) = @_;
    my $ident = ${ $self };

    # the only valid idiom for calling a method with both a header and a body
    # is
    # ->call($method, $body_ref, $header_ref);
    #
    # These other idioms all assume an empty header:
    # ->call($method, %body_of);    # %body_of is a hash
    # ->call($method, $body);       # $body is a scalar
    my ($data, $header) = ref $data_from[0]
      ? ($data_from[0], $data_from[1] )
      : (@data_from>1)
          ? ( { @data_from }, undef )
          : ( $data_from[0], undef );

    # get operation name and soap_action
    my ($operation, $soap_action) = (ref $method eq 'HASH')
        ? ( $method->{ operation }, $method->{ soap_action } )
        : (blessed $data
            && $data->isa('SOAP::WSDL::XSD::Typelib::Builtin::anyType'))
            ? ( $method , (join q{/}, $data->get_xmlns(), $method) )
            : ( $method, q{} );
    $serializer_of{ $ident } ||= SOAP::WSDL::Factory::Serializer->get_serializer({
        soap_version => $self->get_soap_version(),
    });

    my $envelope = $serializer_of{ $ident }->serialize({
        method => $operation,
        body => $data,
        header => $header,
        options => {prefix => $prefix_of{ $ident }},
    });

    return $envelope if $self->no_dispatch();

    # always quote SOAPAction header.
    # WS-I BP 1.0 R1109
    if ($soap_action) {
        $soap_action =~s{\A(:?"|')?}{"}xms;
        $soap_action =~s{(:?"|')?\Z}{"}xms;
    }
    else {
        $soap_action = q{""};
    }

    # get response via transport layer.
    # Normally, SOAP::Lite's transport layer is used, though users
    # may provide their own.
    my $transport = $self->get_transport();
    my $response = $transport->send_receive(
       endpoint => $self->get_endpoint(),
       content_type => $content_type_of{ $ident },
       envelope => $envelope,
       action => $soap_action,
       # on_receive_chunk => sub {}     # optional, may be used for parsing large responses as they arrive.
    );

    return $response if ($outputxml_of{ $ident } );

    # get deserializer
    $deserializer_of{ $ident } ||= SOAP::WSDL::Factory::Deserializer->get_deserializer({
        soap_version => $soap_version_of{ $ident },
    });

    # set class resolver if serializer supports it
    $deserializer_of{ $ident }->set_class_resolver( $class_resolver_of{ $ident } )
        if ( $deserializer_of{ $ident }->can('set_class_resolver') );

    # Try deserializing response - there may be some,
    # even if transport did not succeed (got a 500 response)
    if ( $response ) {
        my ($result_body, $result_header) = eval {
            $deserializer_of{ $ident }->deserialize( $response );
        };
        if (not $@) {
            return wantarray
                ? ($result_body, $result_header)
                : $result_body;
        }
        return $deserializer_of{ $ident }->generate_fault({
            code => 'soap:Server',
            role => 'urn:localhost',
            message => "Error deserializing message: $@. \n"
                . "Message was: \n$response"
        });
    };

    # if we had no success (Transport layer error status code)
    # or if transport layer failed
    if ( ! $transport->is_success() ) {

        # generate & return fault if we cannot serialize response
        # or have none...
        return $deserializer_of{ $ident }->generate_fault({
            code => 'soap:Server',
            role => 'urn:localhost',
            message => 'Error sending / receiving message: '
                . $transport->message()
        });
    }
} ## end sub call

1;

__END__

=pod

=head1 NAME

SOAP::WSDL::Client - SOAP::WSDL's SOAP Client

=head1 SYNOPSIS

 use SOAP::WSDL::Client;
 my $soap = SOAP::WSDL::Client->new({
     proxy => 'http://www.example.org/webservice/test'
 });
 $soap->call( \%method, $body, $header);

=head1 METHODS

=head2 call

 $soap->call( \%method, \@parts );

%method is a hash with the following keys:

 Name           Description
 ----------------------------------------------------
 operation      operation name
 soap_action    SOAPAction HTTP header to use
 style          Operation style. One of (document|rpc)
 use            SOAP body encoding. One of (literal|encoded)

The style and use keys have no influence yet.

@parts is a list containing the elements of the message parts.

For backward compatibility, call may also be called as below:

 $soap->call( $method, \@parts );

In this case, $method is the SOAP operation name, and the SOAPAction header
is guessed from the first part's namespace and the operation name (which is
mostly correct, but may fail). Operation style and body encoding are assumed to
be document/literal

=head2 Configuration methods

=head3 outputxml

 $soap->outputxml(1);

When set, call() returns the raw XML of the SOAP Envelope.

=head3 set_content_type

 $soap->set_content_type('application/xml; charset: utf8');

Sets the content type and character encoding.

You probably should not use a character encoding different from utf8:
SOAP::WSDL::Client will not convert the request into a different encoding
(yet).

To leave out the encoding, just set the content type without appending charset
like this:

  $soap->set_content_type('text/xml');

Default:

 text/xml; charset: utf8

=head3 set_prefix

 $soap->set_prefix('ns2');

If set, alters the serialization of the request XML such that the supplied value is used as a namespace prefix for SOAP method calls. By way of example, the default XML serialization returns something like this:

    <?xml version="1.0"?>
    <SOAP-ENV:Envelope
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
      <SOAP-ENV:Body>
        <getElementId xmlns="http://services.exmaple.org/">
          <elementId>12345</elementId>
        </getElementId>
      </SOAP-ENV:Body>
    </SOAP-ENV:Envelope>

If the sample set_prefix() call above is used prior to calling your SOAP method, the XML serialization returns this instead:

    <?xml version="1.0"?>
    <SOAP-ENV:Envelope
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
        xmlns:ns2="http://services.example.org/">
      <SOAP-ENV:Body>
        <ns2:getElementId>
          <elementId>12345</elementId>
        </ns2:getElementId>
      </SOAP-ENV:Body>
    </SOAP-ENV:Envelope>

This is useful in cases where, for instance, one is communicating with a JAX L<https://jax-ws.dev.java.net/> webservice, which tends to understand the latter but not the former. Note that this implementation is currently limited to a single additional namespace; if you require multiple custom namespaces, you should probably look into creating your own serializer.

=head2 Features different from SOAP::Lite

SOAP::WSDL does not aim to be a complete replacement for SOAP::Lite - the
SOAP::Lite module has its strengths and weaknesses and SOAP::WSDL is
designed as a cure for the weakness of little WSDL support - nothing more,
nothing less.

Nonetheless SOAP::WSDL mimics part of SOAP::Lite's API and behaviour,
so SOAP::Lite users can switch without looking up every method call in the
documentation.

A few things are quite different from SOAP::Lite, though:

=head3 SOAP request data

SOAP request data may either be given as message object, or as a hash ref (in
which case it will automatically be encoded into a message object).

=head3 Return values

The result from call() is not a SOAP::SOM object, but a message object.

Message objects' classes may be generated from WSDL definitions automatically
- see SOAP::WSDL::Generator::Typelib on how to generate your own WSDL based
message class library.

=head3 Fault handling

SOAP::WSDL::Client returns a fault object on errors, even on transport layer
errors.

The fault object is a SOAP1.1 fault object of the following
C<SOAP::WSDL::SOAP::Typelib::Fault11>.

SOAP::WSDL::SOAP::Typelib::Fault11 objects are false in boolean context, so
you can just do something like:

 my $result = $soap->call($method, $data);

 if ($result) {
    # handle result
 }
 else {
    die $result->faultstring();
 }

=head3 outputxml

SOAP::Lite returns only the content of the SOAP body when outputxml is set
to true. SOAP::WSDL::Client returns the complete XML response.

=head3 Auto-Dispatching

SOAP::WSDL::Client B<does not> support auto-dispatching.

This is on purpose: You may easily create interface classes by using
SOAP::WSDL::Client and implementing something like

 sub mySoapMethod {
     my $self = shift;
     $soap_wsdl_client->call( mySoapMethod, @_);
 }

You may even do this in a class factory - see L<wsdl2perl.pl> for creating
such interfaces.

=head1 TROUBLESHOOTING

=head2 Accessing protected web services

Accessing protected web services is very specific for the transport
backend used.

In general, you may pass additional arguments to the set_proxy method (or
a list ref of the web service address and any additional arguments to the
new method's I<proxy> argument).

Refer to the appropriate transport module for documentation.

=head1 LICENSE AND COPYRIGHT

Copyright 2004-2007 Martin Kutter.

This file is part of SOAP-WSDL. You may distribute/modify it under the same
terms as perl itself

=head1 AUTHOR

Martin Kutter E<lt>martin.kutter fen-net.deE<gt>

=head1 REPOSITORY INFORMATION

 $Rev: 677 $
 $LastChangedBy: kutterma $
 $Id: Client.pm 677 2008-05-18 20:17:56Z kutterma $
 $HeadURL: http://soap-wsdl.svn.sourceforge.net/svnroot/soap-wsdl/SOAP-WSDL/trunk/lib/SOAP/WSDL/Client.pm $

=cut

