Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

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


Comment on Re^3: Get Timout with LWP
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://368598]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (7)
As of 2015-07-31 03:28 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (274 votes), past polls