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package HTTP::Entity::Parser::MultiPart;
use strict;
use warnings;
use HTTP::MultiPartParser;
use File::Temp qw/tempfile/;
use Carp qw//;
use Fcntl ":seek";
#
# copy from https://gist.github.com/chansen/7163968
#
sub extract_form_data {
local $_ = shift;
# Fast exit for common form-data disposition
if (/\A form-data; \s name="((?:[^"]|\\")*)" (?: ;\s filename="((?:[^"]|\\")*)" )? \z/x) {
return ($1, $2);
}
# disposition type must be form-data
s/\A \s* form-data \s* ; //xi
or return;
my (%p, $k, $v);
while (length) {
s/ ^ \s+ //x;
s/ \s+ $ //x;
# skip empty parameters and unknown tokens
next if s/^ [^\s"=;]* \s* ; //x;
# parameter name (token)
s/^ ([^\s"=;]+) \s* = \s* //x
or return;
$k = lc $1;
# quoted parameter value
if (s/^ "((?:[^"]|\\")*)" \s* (?: ; | $) //x) {
$v = $1;
}
# unquoted parameter value (token)
elsif (s/^ ([^\s";]*) \s* (?: ; | $) //x) {
$v = $1;
}
else {
return;
}
if ($k eq 'name' || $k eq 'filename') {
return () if exists $p{$k};
$p{$k} = $v;
}
}
return exists $p{name} ? @p{qw(name filename)} : ();
}
sub new {
my ($class, $env, $opts) = @_;
my $self = bless { }, $class;
my @uploads;
my @params;
unless (defined $env->{CONTENT_TYPE}) {
Carp::croak("Missing CONTENT_TYPE in PSGI env");
}
unless ( $env->{CONTENT_TYPE} =~ /boundary=\"?([^\";]+)\"?/ ) {
Carp::croak("Invalid boundary in content_type: $env->{CONTENT_TYPE}");
}
my $boundary = $1;
my $part;
my $parser = HTTP::MultiPartParser->new(
boundary => $boundary,
on_header => sub {
my ($headers) = @_;
my $disposition;
foreach (@$headers) {
if (/\A Content-Disposition: [\x09\x20]* (.*)/xi) {
$disposition = $1;
last;
}
}
(defined $disposition)
or die q/Content-Disposition header is missing in part/;
my ($disposition_name, $disposition_filename) = extract_form_data($disposition);
defined $disposition_name
or die q/Parameter 'name' is missing from Content-Disposition header/;
$part = {
name => $disposition_name,
headers => $headers,
};
if ( defined $disposition_filename ) {
$part->{filename} = $disposition_filename;
$self->{tempdir} ||= do {
my $dir = File::Temp->newdir('XXXXX', TMPDIR => 1, CLEANUP => 1);
# Temporary dirs will remove after the request.
push @{$env->{'http.entity.parser.multipart.tempdir'}}, $dir;
$dir;
};
my ($tempfh, $tempname) = tempfile(UNLINK => 0, DIR => $self->{tempdir});
$part->{fh} = $tempfh;
$part->{tempname} = $tempname;
}
},
on_body => sub {
my ($chunk, $final) = @_;
my $fh = $part->{fh};
if ($fh) {
print $fh $chunk
or die qq/Could not write to file handle: '$!'/;
if ($final && $part->{filename} ne "" ) { # compatible with HTTP::Body
seek($fh, 0, SEEK_SET)
or die qq/Could not rewind file handle: '$!'/;
my @headers = map { split(/\s*:\s*/, $_, 2) }
@{$part->{headers}};
push @uploads, $part->{name}, {
name => $part->{name},
headers => \@headers,
size => -s $part->{fh},
filename => $part->{filename},
tempname => $part->{tempname},
};
}
} else {
$part->{data} .= $chunk;
if ($final) {
push @params, $part->{name}, $part->{data};
}
}
},
$opts->{on_error} ? (on_error => $opts->{on_error}) : (),
);
$self->{parser} = $parser;
$self->{params} = \@params;
$self->{uploads} = \@uploads;
return $self;
}
sub add {
my $self = shift;
$self->{parser}->parse($_[0]) if defined $_[0];
}
sub finalize {
my $self = shift;
(delete $self->{parser})->finish();
return ($self->{params}, $self->{uploads});
}
1;
__END__
=encoding utf-8
=head1 NAME
HTTP::Entity::Parser::MultiPart - parser for multipart/form-data
=head1 SYNOPSIS
use HTTP::Entity::Parser;
my $parser = HTTP::Entity::Parser->new;
$parser->register('multipart/form-data','HTTP::Entity::Parser::MultiPart');
=head1 DESCRIPTION
This is a parser class for multipart/form-data.
MultiPart parser use L<HTTP::MultiPartParser>.
=head1 LICENSE
Copyright (C) Masahiro Nagano.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=head1 AUTHOR
Masahiro Nagano E<lt>kazeburo@gmail.comE<gt>
Tokuhiro Matsuno E<lt>tokuhirom@gmail.comE<gt>
=cut
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