Your problem is that you're using <> to read line by line:
my $answer = <$remote> || '---';

[download]

Since your header can contain (multiple!) \n characters, you can't use <> to get it (you may be able to use <> for the data, depending on whether it has embedded \n characters). Instead of using <>, you want to use read or recv to get first the header, then the remaining bytes. You can forget about the linefeed, since you have a count:

my $header;
$remote->read($header, 8);
($op, $hvers, undef, undef, $count) = unpack "C4N", $header;
my $data;
$remote->read($data, $count);

[download]

If you want to mix the read idioms (per tye's suggestion) (of course, this assumes you can't have embedded \n in your data), you can do it this way:

my $header;
$remote->read($header, 8);
($op, $hvers, undef, undef, $count) = unpack "C4N", $header;
my $data = <$remote>;

[download]

update: changed to mention read and show mixture of idioms (thanks tye!), attribute to tye correctly

In reply to Re: IO:Socket::INET - how to receive binary data by bikeNomad
in thread IO:Socket::INET - how to receive binary data by Rudif

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