Hello, I was wondering of there are any socket gurus who might be willing to give the following a quick glance to make sure I'm going about this the right way. This is an echo server.
#!/usr/bin/perl -w
use IO::Select;
use IO::Socket;
use strict;
$|++;
my $port = 9999;
my $server = IO::Socket::INET->new (
Proto => 'tcp',
LocalPort => $port,
Listen => SOMAXCONN,
Reuse => 1);
(! $server) && die "Could not setup server - $!\n";
$server->autoflush(1);
while (my $client = $server->accept()) {
my $request;
my $selector = IO::Select->new($client);
if ($selector->can_read(10)) {
my $buffer;
while (sysread($client, $buffer, 1024)) {
$request .= $buffer;
}
} else {
print "Selector *cannot* read or timed out after 10 seconds.\n";
next;
}
#print $request, "\n";
syswrite($client, $request);
$client->shutdown(1);
}
Specifically I'm wondering if
sysread and
syswrite are what are should be using. I've seen server code that uses
while (<$client>) { instead of
sysread and
print $client $request instead of
syswrite. I think I'm confused as to which one is better.
Brutus.
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