Hi, I'm just starting to use POE. Here's a basic question I'm stuck with: I've got a simple TCP server using POE(with my own filters), which accepts some commands and responds with 1 or 0 depending on whether the commands are valid. When I test it using telnet, all is fine. What I'm trying to do is to write a simple client in POE, I'd like to make a connection, and then just send the server a sequence of commands. I'd like to be able to handle the server response for each command. But I can't seem to control how the sequence is sent: in some runs, each is sent one at a time; in some other runs, all is sent in one batch. Is there a way to make sure each command is sent individually? sort of flushing IO after each command? 
#!/usr/bin/perl -w
#
# simple client
#

use warnings;
use strict;

use POE;
use POE::Component::Client::TCP;
use POE::Filter::Stream;

my $host  = "localhost";
my $port  = 38888;

POE::Component::Client::TCP->new( 
        RemoteAddress => $host,    
        RemotePort => $port,
        Filter     => "POE::Filter::Stream",

        Connected => sub {
            print "connected to $host:$port ...\n";
             #now send 10 commands in a row.
             # is this the right way to send a sequence?
             foreach my $i(1..10){
                 $_[HEAP]->{server}->put("command-$i");
             }
        },

        ConnectError => sub {
            print "could not connect to $host:$port ...\n";
        },

        ServerInput => sub {
            my ( $kernel, $heap, $input ) = @_[ KERNEL,HEAP, ARG0 ];
            print "$input\n";
        },
      );

POE::Kernel->run();
exit 0;

[download]
UPdated: it still doesn't seem to work if I add "\n" to the end of commands, and use the Line filter.

In reply to POE: how to flush io? by johnnywang

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