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lib/AMF/Perl/IO/Serializer.pm  view on Meta::CPAN

package AMF::Perl::IO::Serializer;
# Copyright (c) 2003 by Vsevolod (Simon) Ilyushchenko. All rights reserved.
# This program is free software; you can redistribute it and/or modify it
# under the same terms as Perl itself.
# The code is based on the -PHP project (http://amfphp.sourceforge.net/)

=head1 NAME

    AMF::Perl::IO::Serializer

=head1 DESCRIPTION    

    Class used to convert physical perl objects into binary data.

=head1 CHANGES

=head2 Sun May 23 12:35:19 EDT 2004

=item Changed deduceType() to return the value too, as it may be changed inside, and to 
handle empty string ('') as a string.

=head2 Wed Apr 14 11:06:28 EDT 2004

=item Made basic data type determination work for both scalars and scalarrefs.

=item Now we check if we are sending a recordset and setting column types accordingly.

=head2 Sat Mar 13 16:25:00 EST 2004

=item Patch from Tilghman Lesher that detects numbers and dates in strings
and sets return type accordingly.

=item Patch from Kostas Chatzikokolakis handling encoding and sending null value.

=head2 Sun May 11 16:43:05 EDT 2003

=item Changed writeData to set type to "NULL" when the incoming data is undef. Previously
it became a String, just like other scalars.

=item Changed PHP's writeRecordset to a generic writeAMFObject. Verified Recordset support.

=head2 Sun Mar  9 18:20:16 EST 2003

=item Function writeObject should return the same as writeHash. This assumes that all meaningful data
are stored as hash keys.

=cut


use strict;

use Encode qw/from_to/;
use DBI;

# holder for the data
my $data;

sub new
{	
    my ($proto, $stream, $encoding) = @_;
    # save
    my $self={};
    bless $self, $proto;
    $self->{out} = $stream;
	$self->{encoding} = $encoding;
    return $self;
}

sub serialize
{
    my ($self, $d) = @_;
    $self->{amfout} = $d;
    # write the version ???
    $self->{out}->writeInt(0);
    
    # get the header count
    my $count = $self->{amfout}->numHeader();
    # write header count
    $self->{out}->writeInt($count);
    
    for (my $i=0; $i<$count; $i++)
    {
        $self->writeHeader($i);
    }
        
    $count = $self->{amfout}->numBody();
    # write the body count
    $self->{out}->writeInt($count);
    
    for (my $i=0; $i<$count; $i++)
    {
        # start writing the body
        $self->writeBody($i);
    }
}

sub writeHeader
{
    my ($self, $i)=@_;

    
    # for all header values
    # write the header to the output stream
    # ignoring header for now
}

sub writeBody
{
    my ($self, $i)=@_;
    my $body = $self->{amfout}->getBodyAt($i);
    # write the responseURI header
    $self->{out}->writeUTF($body->{"target"});
    # write null, haven't found another use for this
    $self->{out}->writeUTF($body->{"response"});
    # always, always there is four bytes of FF, which is -1 of course
    $self->{out}->writeLong(-1);
    # write the data to the output stream
    $self->writeData($body->{"value"}, $body->{"type"});
}

# writes a boolean
sub writeBoolean
{
    my ($self, $d)=@_;
    # write the boolean flag
    $self->{out}->writeByte(1);
    # write the boolean byte
    $self->{out}->writeByte($d);
}
# writes a string under 65536 chars, a longUTF is used and isn't complete yet
sub writeString
{
    my ($self, $d)=@_;
    # write the string code
    $self->{out}->writeByte(2);
    # write the string value
    #$self->{out}->writeUTF(utf8_encode($d));
	from_to($d, $self->{encoding}, "utf8") if $self->{encoding};
    $self->{out}->writeUTF($d);
}

sub writeXML
{
    my ($self, $d)=@_;
    $self->{out}->writeByte(15);
    #$self->{out}->writeLongUTF(utf8_encode($d));
	from_to($d, $self->{encoding}, "utf8") if $self->{encoding};
    $self->{out}->writeLongUTF($d);
}

# must be used PHPRemoting with the service to set the return type to date
# still needs a more in depth look at the timezone
sub writeDate
{
    my ($self, $d)=@_;
    # write date code
    $self->{out}->writeByte(11);
    # write date (milliseconds from 1970)
    $self->{out}->writeDouble($d);
    # write timezone
    # ?? this is wierd -- put what you like and it pumps it back into flash at the current GMT ?? 
    # have a look at the amf it creates...
    $self->{out}->writeInt(0); 
}

# write a number formatted as a double with the bytes reversed
# this may not work on a Win machine because i believe doubles are
# already reversed, to fix this comment out the reversing part
# of the writeDouble method
sub writeNumber
{
    my ($self, $d)=@_;
    # write the number code
    $self->{out}->writeByte(0);
    # write the number as a double
    $self->{out}->writeDouble($d);
}
# write null
sub writeNull
{
    my ($self)=@_;
    # null is only a 0x05 flag
    $self->{out}->writeByte(5);
}

# write array
# since everything in php is an array this includes arrays with numeric and string indexes
sub writeArray
{
    my ($self, $d)=@_;

    # grab the total number of elements
    my $len = scalar(@$d);

    # write the numeric array code
    $self->{out}->writeByte(10);
    # write the count of items in the array
    $self->{out}->writeLong($len);
    # write all of the array elements
    for(my $i=0 ; $i < $len ; $i++)
    {
		#If this is a basic data type in a recordset, consider the column type.
		if (!(ref $d->[$i]) && $self->{__writingRecordset__})
		{
			my $type = $self->{__columnTypes__}->[$i];
			$self->dispatchBySqlType($d->[$i], $type);
		}