我正在使用多线程TCP服务器.在主线程中,我在套接字上侦听并为新的传入连接创建一个新线程.我想将所有传入连接保存在哈希中,以便我可以从另一个线程访问它们.
从监视器线程,我无法读取任何新添加的连接.在创建监视器线程时,似乎会创建一个新的客户端哈希.
如何保留所有套接字的列表并从我的监视器线程中循环它们？
当前代码：
#!/usr/bin/perl
use strict;
use IO::Socket;
use threads;
use Thread::Queue;
# init
my $clients = {};
my $queue = Thread::Queue->new;
# thread that monitors
threads->create("monitor");
# create the listen socket
my $listenSocket = IO::Socket::INET->new(LocalPort => 12345,Listen => 10,Proto => 'tcp',Reuse => 1);
# make sure we are bound to the port
die "Cant't create a listening socket: $@" unless $listenSocket;
print "Server ready. Waiting for connections on 34567 ... \n";
# wait for connections at the accept call
while (my $connection = $listenSocket->accept) {
# set client socket to non blocking
my $nonblocking = 1;
ioctl($connection,0x8004667e,\\$nonblocking);
# autoflush
$connection->autoflush(1);
# debug
print "Accepted new connection\n";
# add to list
$clients->{time()} = $connection;
# start new thread and listen on the socket
threads->create("readData",$connection);
}
sub readData {
# socket parameter
my ($client) = @_;
# read client
while (<$client>) {
# remove newline
chomp $_;
# add to queue
$queue->enqueue($_);
}
close $client;
}
sub monitor {
# endless loop
while (1) {
# loop while there is something in the queue
while ($queue->pending) {
# get data from a queue
my $data = $queue->dequeue;
# loop all sockets
while ( my ($key,$value) = each(%$clients) ) {
# send to socket
print $value "$data\n";
}
}
# wait 0,25 seconds
select(undef,undef,0.25);
}
}
close $listenSocket;
解决方法
您需要通过
threads::shared分享$client：
my $clients = &share({});
旧式语法是由Perl原型的文档问题引起的.如果您有at least Perl 5.8.9,请使用更好的
my $clients = shared_clone({});
代替.
您还希望使用锁来保护$client,例如
my $clients_lock : shared;
{
lock $clients_lock;
$clients->{time()} = fileno $connection;
}
最后,因为IO :: Socket :: INET实例是Perl typeglobs,你不能共享它们,所以改为将它们的套接字描述符(从fileno)添加到$clients,然后在必要时用fdopen套接字
open my $fh,">&=",$sockdesc or warn ...
下面的程序将入站数据重复到其他连接的套接字：
#!/usr/bin/perl
use strict;
use IO::Socket;
use threads;
use threads::shared;
use Thread::Queue;
# init
my $clients = &share({});
my $clients_lock : shared;
my $queue = Thread::Queue->new;
# thread that monitors
threads->create("monitor");
# create the listen socket
my $port = 12345;
my $listenSocket = IO::Socket::INET->new(
LocalPort => $port,Listen => 10,Proto => 'tcp',Reuse => 1
);
# make sure we are bound to the port
die "Can't create a listening socket: $@" unless $listenSocket;
print "Server ready. Waiting for connections on $port ... \n";
# wait for connections at the accept call
while (my $connection = $listenSocket->accept) {
# set client socket to non blocking
my $nonblocking = 1;
ioctl($connection,\\$nonblocking);
# autoflush
$connection->autoflush(1);
# debug
print "Accepted new connection\n";
# add to list
{
lock $clients_lock;
$clients->{time()} = fileno $connection;
}
# start new thread and listen on the socket
threads->create("readData",$connection);
}
sub readData {
# socket parameter
my ($client) = @_;
# read client
while (<$client>) {
chomp;
$queue->enqueue($_);
}
close $client;
}
sub monitor {
# endless loop
while (1) {
# loop while there is something in the queue
while ($queue->pending) {
# get data from a queue
my $data = $queue->dequeue;
# loop all sockets
{
lock $clients_lock;
while ( my ($key,$value) = each(%$clients) ) {
# send to socket
if (open my $fh,$value) {
print $fh "$data\n";
}
else {
warn "$0: fdopen $value: $!";
}
}
}
}
# wait 0,25 seconds
select(undef,0.25);
}
}
close $listenSocket;