如何在我的代码中设置PERL recv超时?
我想在下面的特定代码中设置recv函数的超时,因为有时我的脚本会永远卡住。我是套接字编程新手,因此我非常感谢您的帮助。提前谢谢如何在我的代码中设置PERL recv超时?,perl,sockets,tcp,tcpserver,tcpsocket,Perl,Sockets,Tcp,Tcpserver,Tcpsocket,我想在下面的特定代码中设置recv函数的超时,因为有时我的脚本会永远卡住。我是套接字编程新手,因此我非常感谢您的帮助。提前谢谢 use IO::Socket::INET; use IO::Select; use LWP::UserAgent; use JSON::XS 'decode_json'; use Data::Dumper; use DBI(); sub dbconn { my $db_conf = shift; my $dbh = DBI->connect("D
use IO::Socket::INET;
use IO::Select;
use LWP::UserAgent;
use JSON::XS 'decode_json';
use Data::Dumper;
use DBI();
sub dbconn {
my $db_conf = shift;
my $dbh = DBI->connect("DBI:Pg:dbname=somedatabase;host=somehost", "postgres", "",
{pg_server_prepare =>
0,AutoCommit => 1,RaiseError=>1});
$dbh->do("SET CLIENT_ENCODING TO 'UTF-8';");
return $dbh;
}
# auto-flush on socket
$| = 1;
# creating a listening socket
my $socket = new IO::Socket::INET (
LocalHost => '0.0.0.0',
LocalPort => '5000',
Proto => 'tcp',
Listen => 5,
Reuse => 1
);
die "cannot create socket $!\n" unless $socket;
$sel = IO::Select->new( $socket );
print "Server waiting for client connection on port 5000...\n";
my $command = 1;
my $watchTracker = "*HQ,";
my $tl206 = ",LAT:";
my $watchConnectedCheck = ",A,";
my $gpsType;
my $circleString = ",LINK,";
my $dataToSend;
my $new;
my $dbh = dbconn();
while(@ready = $sel->can_read) {
foreach $fh (@ready) {
if($fh == $socket) {
# Create a new socket
$new = $socket->accept;
$new->recv($dataReceived, 1024);
$new->recv($dataReceived, 1024);
# get information about a newly connected client
my $client_address = $new->peerhost();
my $client_port = $new->peerport();
print "===============================================\n";
print "===============================================\n\n";
print "Connection from $client_address:$client_port\n";
print "General data received: $dataReceived\n\n";
#MORE LINES...
}
else {
# Process socket
# Maybe we have finished with the socket
$sel->remove($fh);
$fh->close;
}
}
}
$dbh->disconnect();
也许我误解了这个问题,但是您是否尝试过用“timeout”在套接字中设置超时
看
编辑:我没听清楚“recv”部分。您必须使用setsockopt,它不是完全可移植的,因此最终答案在某种程度上取决于您的平台。以下是一些可能有帮助的帖子:
例如:
是的,什么也没发生。我认为我必须在recv函数中设置一个超时,以避免永远等待接收当前周期的数据。欢迎提出任何建议。
$socket->setsockopt(SOL_SOCKET, SO_RCVTIMEO, pack('l!l!', 30, 0))
or die "setsockopt: $!";