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|
#!/usr/bin/perl
use strict;
use warnings;
use HTTP::MultiPartParser qw[];
use Hash::MultiValue qw[];
use IO::File qw[SEEK_SET];
use File::Temp qw[];
# extracts name and filename values from Content-Disposition header.
# returns the escaped value, due to different behaviour across browsers.
# (see 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)} : ();
}
my $params = Hash::MultiValue->new;
my $uploads = Hash::MultiValue->new;
my $part;
my $parser = HTTP::MultiPartParser->new(
boundary => '----------0xKhTmLbOuNdArY',
on_header => sub {
my ($headers) = @_;
my $disposition;
foreach (@$headers) {
if (/\A Content-Disposition: [\x09\x20]* (.*)/xi) {
$disposition = $1;
last;
}
}
(defined $disposition)
or die q/Content-Disposition header is missing/;
my ($name, $filename) = extract_form_data($disposition);
(defined $name)
or die qq/Invalid Content-Disposition: '$disposition'/;
$part = {
name => $name,
headers => $headers,
};
if (defined $filename) {
$part->{filename} = $filename;
if (length $filename) {
my $fh = File::Temp->new(UNLINK => 1);
$part->{fh} = $fh;
$part->{tempname} = $fh->filename;
}
}
},
on_body => sub {
my ($chunk, $final) = @_;
my $fh = $part->{fh};
if ($fh) {
print $fh $chunk
or die qq/Could not write to file handle: '$!'/;
if ($final) {
seek($fh, 0, SEEK_SET)
or die qq/Could not rewind file handle: '$!'/;
$part->{size} = -s $fh;
$uploads->add($part->{name}, $part);
}
}
else {
$part->{data} .= $chunk;
if ($final) {
$params->add($part->{name}, $part->{data});
}
}
}
);
open my $fh, '<:raw', 't/data/001-content.dat'
or die;
while () {
my $n = read($fh, my $buffer, 1024);
unless ($n) {
die qq/Could not read from fh: '$!'/
unless defined $n;
last;
}
$parser->parse($buffer);
}
$parser->finish;
|
