dechunk loop can stuck on empty chunked post

[PavelTrushkin]

original code is
DECHUNK: while(1) {
$input->read(my $chunk, $buffer_length);

of course it will iterate forever on empty or malformed post chunked request

fix is easy
DECHUNK: while($input->read(my $chunk, $buffer_length)) {

also imho inner dechunking while is very very strange solution for potentially very large data - it copies data every $buffer_length bytes for large content

[kazeburo]

How about adding check buffer like these?

my $spin = 0;
DECHUNK: while(1) {
$input->read(my $chunk, $buffer_length);
my $read = length $chunk;
if ($read == 0 ) {
  Carp::croak "Malformed chunked request" if  $spin++ > 2000; 
  next;
}
$chunk_buffer .= $chunk;
while ( $chunk_buffer =~ s/^(([0-9a-fA-F]+).*\015\012)// ) {

[pippo]

I'd like to follow up on this.
@kazeburo Can the solution above be applied?