Here's some simple code to pass messages between peers:

The sender:

sub transport_message {
 my $self = shift;
 my $message_string = shift;
 my $peer = shift;

 my $headers = new HTTP::Headers;
 $headers->date(time);
 $headers->content_type('text/plain');
 $headers->server('Net::Distributed');

 my $request = new HTTP::Request (
  'POST',
  "http://" . $peer->address,
  $headers,
  $message_string
 );


 unless ($self->{UserAgent}) {
  $self->{UserAgent} = new LWP::UserAgent;
  $self->{UserAgent}->agent ("Net::Distributed::Transport/$VERSION");
  $self->{UserAgent}->from ($self->{email});
  $self->{UserAgent}->parse_head(0);
  $self->{UserAgent}->timeout($self->{send_timeout}); 
   # send_timeout normally 5 secs
 }
 my $ua = $self->{UserAgent};

 my $response = $ua->request($request); 

 if ($response->is_success) {
  return 1; # of course, there may be problems further down the line
 } else {
  $self->_debug("Got " . $response->status_line . " from " . $peer->ad
+dress, 0);

  return 0;
 }
}
[download]

The receiver:

sub accept_messages {
 my $self = shift;

 unless ($self->{daemon}) {
  my ($localaddr, $localport) = split /:/, $self->{address};
  $self->{daemon} = new HTTP::Daemon (
   LocalAddr => $localaddr,
   LocalPort => $localport
  );
  ref $self->{daemon} or $self->_debug("Could not create HTTP::Daemon 
+$! $@", 3);
  $self->{daemon}->timeout($self->{timeout}) if $self->{timeout}; 
  # normally timeout is 20
 }

 local $SIG{PIPE} = sub {
   warn 'PIPE WHILE READING';
   undef $self->{daemon};
    };
 CONNECTION: while (1) {
  my $conn = $self->{daemon}->accept; # blocks
  return undef unless $conn;
  my $req = $conn->get_request;
  unless ($req) {
   $self->_debug(
     'Problem reading from connection: ' .
     $conn->reason
      );
   next CONNECTION;
  }
  if ($req->method ne 'POST') {

   my $r = new HTTP::Response (405,'POST method only' );

   $conn->send_response($r);
   $conn->close;
   next CONNECTION;
  }
  elsif (my $content = $req->content) {

   my $r = new HTTP::Response(200, 'OK');
   $conn->send_response($r);

   $conn->close;

   return $content;
  }
 }
}
[download]

A lot of messages are flying about, and it gets pretty busy. I keep getting 'broken pipe' signals. Of course, I can ignore them with $SIG{PIPE} = 'IGNORE', but my attempts to send and receive messages still fail with timeouts.

What am I doing wrong? I've read perlipc and understand that I am trying to write to a broken pipe, but how can I stop this happening? Ideally, I need to make sure that the server queues messages and handles them one by one.

TVM

dave hj~

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