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Re^3: Get Timout with LWP

by tachyon (Chancellor)
on Jun 22, 2004 at 01:45 UTC ( #368598=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Get Timout with LWP
in thread Get Timout with LWP

Unfortunately I am not wrong. The hanging behaviour is real. The underlying reason is LWP::Simple uses (for http) the _http_trivial_get() function, not LWP::UserAgent. This implements a 60 second IO::Socket::INET make connection timeout, but no timeout on data recieve. Modifying the test code to use LWP::Simple proves the point (LWP::Simple will wait 500 seconds to get the data - it gets an instant socket, then nothing for 500 seconds). This function remains active in the latest LWP::Simple.

I agree it should really be a subclass of LWP::UserAgent but for http it is not. The timeout behaviour for LWP::Simple and LWP::UserAgent could IMHO use some work.

C:\>type server.pl #!/usr/bin/perl use IO::Socket; use IO::Select; $lsn = IO::Socket::INET->new( Listen => 1, LocalAddr => 'localhost', LocalPort => 9000,); my $client = new IO::Select( $lsn ); while( my @ready = $client->can_read ) { for my $fh (@ready) { if($fh == $lsn) { warn "Accepted new socket\n"; my $new = $lsn->accept; $client->add($new); } else { # Process socket warn "Getting data\n"; $data = <$fh>; # yeah yeah warn "Got $data\nDoing nothing forever!\n"; my @response = split '', "HTTP/1.1 200 OK\n\nHello World!\ +n"; sleep 500; print {$fh} @response; $client->remove($fh); $fh->close(); } } } C:\>type lwp.pl #!/usr/bin/perl $|++; use LWP::Simple; $start = time(); print "Begin at $start\n"; $response = get('http://localhost:9000/'); $end = time(); my $time = $end - $start; print "Done at $end\nTook $time seconds\nGot:\n$response\n"; C:\>perl lwp.pl Begin at 1087868116 Done at 1087868616 Took 500 seconds Got: Hello World! C:\>

cheers

tachyon


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