stop nagling on node output

[spider.git] / perl / Msg.pm

diff --git a/perl/Msg.pm b/perl/Msg.pm
index f2881c8ff9a947932c926bb1c4f5a0cf9e57fac1..5593e937b0323218bbc89bbcfe66a086f266ef41 100644 (file)
--- a/perl/Msg.pm
+++ b/perl/Msg.pm
@@ -52,6 +52,14 @@ BEGIN {
        eval {
                require Errno; Errno->import(qw(EAGAIN EINPROGRESS EWOULDBLOCK));
        };
+       # http://support.microsoft.com/support/kb/articles/Q150/5/37.asp
+       # defines EINPROGRESS as 10035.  We provide it here because some
+       # Win32 users report POSIX::EINPROGRESS is not vendor-supported.
+       if ($^O eq 'MSWin32') { 
+               eval '*EINPROGRESS = sub { 10036 };';
+               eval '*EWOULDBLOCK = *EAGAIN = sub { 10035 };';
+               $blocking_supported = 1;
+       } 
 }
 
 my $w = $^W;
@@ -109,6 +117,17 @@ sub set_rproc
 sub blocking
 {
        return unless $blocking_supported;
+
+       # Make the handle stop blocking, the Windows way.
+       if ($^O eq 'MSWin32') { 
+        my $set_it = $_[1];
+               
+        # 126 is FIONBIO (some docs say 0x7F << 16)
+        ioctl( $_[0],
+               0x80000000 | (4 << 16) | (ord('f') << 8) | 126,
+               $set_it
+             ) or confess "Can't set the handle non-blocking: $!";
+       }
        
        my $flags = fcntl ($_[0], F_GETFL, 0);
        if ($_[1]) {
@@ -356,19 +375,29 @@ sub new_server {
        return $self;
 }
 
+use Socket qw(IPPROTO_TCP TCP_NODELAY);
+
 sub nolinger
 {
        my $conn = shift;
-       my $buf;
-       if (isdbg('sock') && ($buf = getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER))) {
-               my ($l, $t) = unpack("ll", $buf);
-               dbg("Linger is: $buf = $l $t");
+
+       if (isdbg('sock')) {
+               my ($l, $t) = unpack "ll", getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER); 
+               my $k = unpack 'l', getsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE);
+               my $n = unpack "l", getsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY);
+               dbg("Linger is: $l $t, keepalive: $k, nagle: $n");
        }
+
        setsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER, pack("ll", 0, 0)) or confess "setsockopt linger: $!";
        setsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE, 1) or confess "setsockopt keepalive: $!";
-       if (isdbg('sock') && ($buf = getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER))) {
-               my ($l, $t) = unpack("ll", $buf);
-               dbg("Linger is: $buf = $l $t");
+       setsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY, 1) or confess "setsockopt: $!";
+       $conn->{sock}->autoflush(0);
+       
+       if (isdbg('sock')) {
+               my ($l, $t) = unpack "ll", getsockopt($conn->{sock}, SOL_SOCKET, SO_LINGER); 
+               my $k = unpack 'l', getsockopt($conn->{sock}, SOL_SOCKET, SO_KEEPALIVE);
+               my $n = unpack "l", getsockopt($conn->{sock}, IPPROTO_TCP, TCP_NODELAY);
+               dbg("Linger is: $l $t, keepalive: $k, nagle: $n");
        }
 }