/[meteor]/googlecode.com/svn/trunk/Meteor/Connection.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /googlecode.com/svn/trunk/Meteor/Connection.pm

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Revision 50 - (show annotations)
Wed Feb 27 13:55:35 2008 UTC (12 years, 1 month ago) by andrew.betts
File size: 6830 byte(s)
Added crossdomain.xml for flash clients
Incremented version number
Moved 'new message' debug notice to more useful location
Moved default for ChannelInfoTemplate to correct position alphabetically in code
Set simpler default HeaderTemplate
Added LogTimeFormat
Updated description of PingInterval, Persist
Corrected misspelling of Parameter
Reformatted debug output for config initialisation
Added recognition of null byte in config
Fixed problem with mode recognition
Fixed resuming from given message ID
Fixed sending of message backlog
Fixed Shlemiels
Logged connection duration on leavechannel
Fixed name support in channelinfotemplate
Added logging of reasons for connection closes
Abbreviated log output
Fixed tracking of subscriber IDs
Added logging of user agent
Fixed incorrect key for MessageTemplate in Subscriber.pm
Add some additional code comments
Fixed incorrect closure of new connection if previous connection close was waiting on write buffer

1 #!/usr/bin/perl -w
2 ###############################################################################
3 # Meteor
4 # An HTTP server for the 2.0 web
5 # Copyright (c) 2006 contributing authors
6 #
7 # Subscriber.pm
8 #
9 # Description:
10 # Common super-class for controller and subscriber
11 #
12 ###############################################################################
13 #
14 # This program is free software; you can redistribute it and/or modify it
15 # under the terms of the GNU General Public License as published by the Free
16 # Software Foundation; either version 2 of the License, or (at your option)
17 # any later version.
18 #
19 # This program is distributed in the hope that it will be useful, but WITHOUT
20 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
21 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
22 # more details.
23 #
24 # You should have received a copy of the GNU General Public License along
25 # with this program; if not, write to the Free Software Foundation, Inc.,
26 # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #
28 # For more information visit www.meteorserver.org
29 #
30 ###############################################################################
31
32 package Meteor::Connection;
33 ###############################################################################
34 # Configuration
35 ###############################################################################
36
37 use strict;
38
39 use Errno qw(EAGAIN);
40
41 our $MAX_READ_SIZE=8192;
42 our $CONNECTION_WRITE_TIMEOUT=120;
43
44 our @Connections=();
45
46 ###############################################################################
47 # Class methods
48 ###############################################################################
49 sub addAllHandleBits {
50 my $class=shift;
51
52 my $rVecRef=shift;
53 my $wVecRef=shift;
54 my $eVecRef=shift;
55
56 my @cons=@Connections;
57 map {$_->addHandleBits($rVecRef,$wVecRef,$eVecRef) if(defined($_)) } @cons;
58 }
59
60 sub checkAllHandleBits {
61 my $class=shift;
62
63 my $rVec=shift;
64 my $wVec=shift;
65 my $eVec=shift;
66
67 my @cons=@Connections;
68 map {$_->checkHandleBits($rVec,$wVec,$eVec) if(defined($_)) } @cons;
69 }
70
71 sub connectionCount {
72 scalar(@Connections);
73 }
74
75 sub closeAllConnections {
76 my @cons=@Connections;
77
78 map { $_->close(); } @cons;
79 }
80
81 ###############################################################################
82 # Factory methods
83 ###############################################################################
84 sub new {
85 #
86 # Create a new empty instance
87 #
88 my $class=shift;
89
90 my $obj={};
91
92 bless($obj,$class);
93 }
94
95 sub newFromServer {
96 #
97 # new instance from new server connection
98 #
99 my $self=shift->new();
100
101 $::Statistics->{'total_requests'}++;
102
103 my $server=shift;
104 my $socket=$server->conSocket();
105
106 $self->{'socket'}=$socket;
107 $self->{'socketFN'}=$socket->fileno();
108
109 $socket->setNonBlocking();
110
111 $self->{'writeBuffer'}='';
112 $self->{'readBuffer'}='';
113
114 $self->{'bytesWritten'}=0;
115
116 push(@Connections,$self);
117
118 &::syslog('debug',"New %s for %s",ref($self),$socket->{'connection'}->{'remoteIP'});
119
120 $self;
121 }
122
123 ###############################################################################
124 # Instance methods
125 ###############################################################################
126 sub write {
127 my $self=shift;
128
129 $self->{'writeBuffer'}.=shift;
130 $self->{'writeBufferTimestamp'}=time unless(exists($self->{'writeBufferTimestamp'}));
131 }
132
133 sub addHandleBits {
134 my $self=shift;
135
136 my $rVecRef=shift;
137 my $wVecRef=shift;
138 my $eVecRef=shift;
139
140 my $fno=$self->{'socketFN'};
141
142 if($self->{'writeBuffer'} ne '')
143 {
144 if(exists($self->{'writeBufferTimestamp'}) && $self->{'writeBufferTimestamp'}+$CONNECTION_WRITE_TIMEOUT<time)
145 {
146 &::syslog('debug',"%s for %s: write timed out",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'});
147
148 $self->{'writeBuffer'}='';
149 $self->close();
150 return;
151 }
152 vec($$wVecRef,$fno,1)=1;
153 }
154
155 vec($$rVecRef,$fno,1)=1;
156 vec($$eVecRef,$fno,1)=1;
157 }
158
159 sub checkHandleBits {
160 my $self=shift;
161
162 my $rVec=shift;
163 my $wVec=shift;
164 my $eVec=shift;
165
166 my $fno=$self->{'socketFN'};
167
168 if(vec($eVec,$fno,1))
169 {
170 #
171 # Something went wrong!
172 #
173 $self->exceptionReceived();
174
175 return;
176 }
177
178 if(vec($rVec,$fno,1))
179 {
180 #
181 # Data available for read
182 #
183 my $socket=$self->{'socket'};
184
185 my $buffer='';
186 my $bytesRead=sysread($socket->{'handle'},$buffer,$MAX_READ_SIZE);
187 if(defined($bytesRead) && $bytesRead>0)
188 {
189 $::Statistics->{'total_inbound_bytes'}+=$bytesRead;
190 $self->{'readBuffer'}.=$buffer;
191 while($self->{'readBuffer'}=~s/^([^\r\n]*)\r?\n//)
192 {
193 $self->processLine($1);
194 }
195 }
196 elsif(defined($bytesRead) && $bytesRead==0)
197 {
198 # Connection closed
199 $self->{'remoteClosed'}=1;
200 $self->close(1, 'remoteClosed');
201
202 return;
203 }
204 else
205 {
206 unless(${!}==EAGAIN)
207 {
208 &::syslog('notice',"Connection closed: $!");
209 $self->{'remoteClosed'}=1;
210 $self->close(1, 'remoteClosed');
211
212 return;
213 }
214 }
215 }
216
217 if(vec($wVec,$fno,1) && $self->{'writeBuffer'} ne '')
218 {
219 #
220 # Can write
221 #
222 my $socket=$self->{'socket'};
223
224 my $bytesWritten=syswrite($socket->{'handle'},$self->{'writeBuffer'});
225
226 if(defined($bytesWritten) && $bytesWritten>0)
227 {
228 $::Statistics->{'total_outbound_bytes'}+=$bytesWritten;
229 $self->{'bytesWritten'}+=$bytesWritten;
230 $self->{'writeBuffer'}=substr($self->{'writeBuffer'},$bytesWritten);
231 if(length($self->{'writeBuffer'})==0)
232 {
233 delete($self->{'writeBufferTimestamp'});
234 $self->close() if(exists($self->{'autoClose'}));
235 }
236 else
237 {
238 $self->{'writeBufferTimestamp'}=time;
239 }
240 }
241 else
242 {
243 unless(${!}==EAGAIN)
244 {
245 &::syslog('notice',"Connection closed: $!");
246 $self->{'remoteClosed'}=1;
247 $self->close(1, 'remoteClosed');
248
249 return;
250 }
251 }
252 }
253 }
254
255 sub exceptionReceived {
256 my $self=shift;
257
258 $self->{'writeBuffer'}='';
259
260 $self->close();
261 }
262
263 sub close {
264 my $self=shift;
265
266 #&::syslog('debug',"Close called for %s for %s when write buffer empty",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'});
267
268 unless($self->{'remoteClosed'})
269 {
270 if(!exists($self->{'autoClose'}) && length($self->{'writeBuffer'})>0)
271 {
272 $self->{'autoClose'}=1;
273
274 &::syslog('debug',"Will close %s for %s when write buffer empty",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'});
275
276 return;
277 }
278 }
279
280 eval {
281 $self->{'socket'}->close();
282 };
283
284 #
285 # Remove connection from list of connections
286 #
287 my $idx=undef;
288 my $numcon = scalar(@Connections);
289 for(my $i=0;$i<$numcon;$i++)
290 {
291 if($Connections[$i]==$self)
292 {
293 $idx=$i;
294 last;
295 }
296 }
297
298 if(defined($idx))
299 {
300 splice(@Connections,$idx,1);
301 }
302
303 &::syslog('debug',"Closed %s for %s",ref($self),$self->{'socket'}->{'connection'}->{'remoteIP'});
304
305 $self->didClose();
306 }
307
308 sub didClose {
309 }
310
311 1;
312 ############################################################################EOF

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