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package Plack::TempBuffer;
use strict;
use warnings;
use Plack::Util;
use FileHandle; # for seek etc.
our $MaxMemoryBufferSize = 1024 * 1024;
sub new {
my($class, $length) = @_;
# $MaxMemoryBufferSize = 0 -> Always temp file
# $MaxMemoryBufferSize = -1 -> Always PerlIO
my $backend;
if ($MaxMemoryBufferSize < 0) {
$backend = "PerlIO";
} elsif ($MaxMemoryBufferSize == 0) {
$backend = "File";
} elsif (!$length) {
$backend = "Auto";
} elsif ($length > $MaxMemoryBufferSize) {
$backend = "File";
} else {
$backend = "PerlIO";
}
$class->create($backend, $length, $MaxMemoryBufferSize);
}
sub create {
my($class, $backend, $length, $max) = @_;
Plack::Util::load_class($backend, $class)->new($length, $max);
}
sub print;
sub rewind;
sub size;
1;
__END__
=head1 NAME
Plack::TempBuffer - temporary buffer to save bytes
=head1 SYNOPSIS
my $buf = Plack::TempBuffer->new($length);
$buf->print($bytes);
my $size = $buf->size;
my $fh = $buf->rewind;
=head1 DESCRIPTION
Plack::TempBuffer is a buffer class to store arbitrary length of byte
strings and then get a seekable filehandle once everything is
buffered. It uses PerlIO and/or temporary file to save the buffer
depending on the length of the size.
=head1 SEE ALSO
L<Plack> L<Plack::Request>
=cut
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