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andrew.betts |
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#!/usr/bin/perl -w |
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############################################################################### |
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# Meteor |
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# An HTTP server for the 2.0 web |
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# Copyright (c) 2006 contributing authors |
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# |
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# Subscriber.pm |
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# |
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# Description: |
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# Common super-class for controller and subscriber |
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# |
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############################################################################### |
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# |
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# This program is free software; you can redistribute it and/or modify it |
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# under the terms of the GNU General Public License as published by the Free |
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# Software Foundation; either version 2 of the License, or (at your option) |
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# any later version. |
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# |
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# This program is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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# more details. |
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# |
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# You should have received a copy of the GNU General Public License along |
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# with this program; if not, write to the Free Software Foundation, Inc., |
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# For more information visit www.meteorserver.org |
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# |
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############################################################################### |
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package Meteor::Connection; |
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############################################################################### |
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# Configuration |
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############################################################################### |
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use strict; |
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use Errno qw(EAGAIN); |
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our $MAX_READ_SIZE=8192; |
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our $CONNECTION_WRITE_TIMEOUT=120; |
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our @Connections=(); |
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############################################################################### |
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# Class methods |
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############################################################################### |
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sub addAllHandleBits { |
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my $class=shift; |
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my $rVecRef=shift; |
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my $wVecRef=shift; |
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my $eVecRef=shift; |
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map {$_->addHandleBits($rVecRef,$wVecRef,$eVecRef)} @Connections; |
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} |
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sub checkAllHandleBits { |
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my $class=shift; |
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my $rVec=shift; |
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my $wVec=shift; |
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my $eVec=shift; |
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map {$_->checkHandleBits($rVec,$wVec,$eVec)} @Connections; |
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} |
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sub connectionCount { |
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scalar(@Connections); |
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} |
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sub closeAllConnections { |
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my @cons=@Connections; |
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map { $_->close(); } @cons; |
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} |
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############################################################################### |
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# Factory methods |
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############################################################################### |
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sub new { |
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# |
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# Create a new empty instance |
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# |
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my $class=shift; |
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my $obj={}; |
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bless($obj,$class); |
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} |
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sub newFromServer { |
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# |
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# new instance from new server connection |
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# |
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my $self=shift->new(); |
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my $server=shift; |
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my $socket=$server->conSocket(); |
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$self->{'socket'}=$socket; |
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$self->{'socketFN'}=$socket->fileno(); |
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$socket->setNonBlocking(); |
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$self->{'writeBuffer'}=''; |
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$self->{'readBuffer'}=''; |
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push(@Connections,$self); |
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&::syslog('debug',"New %s for %s",ref($self),$socket->{'connection'}->{'remoteIP'}); |
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$self; |
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} |
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############################################################################### |
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# Instance methods |
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############################################################################### |
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sub write { |
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my $self=shift; |
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$self->{'writeBuffer'}.=shift; |
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$self->{'writeBufferTimestamp'}=time unless(exists($self->{'writeBufferTimestamp'})); |
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} |
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sub addHandleBits { |
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my $self=shift; |
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my $rVecRef=shift; |
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my $wVecRef=shift; |
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my $eVecRef=shift; |
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my $fno=$self->{'socketFN'}; |
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if($self->{'writeBuffer'} ne '') |
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{ |
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if(exists($self->{'writeBufferTimestamp'}) && $self->{'writeBufferTimestamp'}+$CONNECTION_WRITE_TIMEOUT<time) |
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{ |
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&::syslog('debug',"%s for %s: write timed out",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'}); |
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$self->{'writeBuffer'}=''; |
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$self->close(); |
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return; |
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} |
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vec($$wVecRef,$fno,1)=1; |
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} |
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vec($$rVecRef,$fno,1)=1; |
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vec($$eVecRef,$fno,1)=1; |
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} |
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sub checkHandleBits { |
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my $self=shift; |
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my $rVec=shift; |
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my $wVec=shift; |
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my $eVec=shift; |
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my $fno=$self->{'socketFN'}; |
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if(vec($eVec,$fno,1)) |
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{ |
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# |
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# Something went wrong! |
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# |
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$self->exceptionReceived(); |
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return; |
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} |
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if(vec($rVec,$fno,1)) |
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{ |
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# |
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# Data available for read |
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# |
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my $socket=$self->{'socket'}; |
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my $buffer=''; |
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my $bytesRead=sysread($socket->{'handle'},$buffer,$MAX_READ_SIZE); |
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if(defined($bytesRead) && $bytesRead>0) |
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{ |
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$self->{'readBuffer'}.=$buffer; |
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while($self->{'readBuffer'}=~s/^([^\r\n]*)\r?\n//) |
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{ |
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$self->processLine($1); |
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} |
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} |
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elsif(defined($bytesRead) && $bytesRead==0) |
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{ |
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# Connection closed |
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$self->{'remoteClosed'}=1; |
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$self->close(); |
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return; |
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} |
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else |
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{ |
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unless(${!}==EAGAIN) |
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{ |
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&::syslog('notice',"Connection closed: $!"); |
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$self->{'remoteClosed'}=1; |
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$self->close(); |
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return; |
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} |
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} |
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} |
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if(vec($wVec,$fno,1) && $self->{'writeBuffer'} ne '') |
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{ |
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# |
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# Can write |
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# |
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my $socket=$self->{'socket'}; |
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my $bytesWritten=syswrite($socket->{'handle'},$self->{'writeBuffer'}); |
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if(defined($bytesWritten) && $bytesWritten>0) |
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{ |
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$self->{'writeBuffer'}=substr($self->{'writeBuffer'},$bytesWritten); |
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if(length($self->{'writeBuffer'})==0) |
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{ |
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delete($self->{'writeBufferTimestamp'}); |
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$self->close() if(exists($self->{'autoClose'})); |
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} |
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else |
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{ |
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$self->{'writeBufferTimestamp'}=time; |
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} |
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} |
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else |
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{ |
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unless(${!}==EAGAIN) |
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{ |
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&::syslog('notice',"Connection closed: $!"); |
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$self->{'remoteClosed'}=1; |
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$self->close(); |
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return; |
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} |
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} |
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} |
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} |
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sub exceptionReceived { |
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my $self=shift; |
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$self->{'writeBuffer'}=''; |
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$self->close(); |
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} |
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sub close { |
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my $self=shift; |
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#&::syslog('debug',"Close called for %s for %s when write buffer empty",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'}); |
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unless($self->{'remoteClosed'}) |
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{ |
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if(!exists($self->{'autoClose'}) && length($self->{'writeBuffer'})>0) |
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{ |
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$self->{'autoClose'}=1; |
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&::syslog('debug',"Will close %s for %s when write buffer empty",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'}); |
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return; |
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} |
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} |
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eval { |
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$self->{'socket'}->close(); |
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}; |
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# |
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# Remove connection from list of connections |
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# |
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my $idx=undef; |
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for(my $i=0;$i<scalar(@Connections);$i++) |
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{ |
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if($Connections[$i]==$self) |
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{ |
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$idx=$i; |
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last; |
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} |
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} |
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if(defined($idx)) |
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{ |
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splice(@Connections,$idx,1); |
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} |
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&::syslog('debug',"Closed %s for %s",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'}); |
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} |
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1; |
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############################################################################EOF |