sleep() is a BLOCKING system call, so your program will just block all
execution for 10 seconds when it reaches that line, not wait for
anything to happen. This will mess up with all the non-blocking code -
as far as the UA is concerned, you started a request and then hung the
program, which I think is why you get a premature connection close.
You are also doing this inside a recurring call, so the IOLoop will try
to start another of these every 20 seconds - each of them blocking the
program for 10 seconds.
Also, if you run this by starting a server (morbo or daemon), you might
want to print to STDERR, not to STDOUT.
On 2/4/14, 7:24 AM, Vincent HETRU wrote:
Hi,
In the UserAgent's doc <%20http://mojolicio.us/perldoc/Mojo/UserAgent>
I read that I can do Non-blocking HTTP requests that does work inside
a running event loop.
So i thought I could run the example code of the documentation inside
the callback of a recurring call like this:
use Mojo::Base 'Mojolicious';
use Data::Dumper;
use Mojo::IOLoop;
# This method will run once at server start
sub startup {
my $self = shift;
my $timer_id = Mojo::IOLoop->recurring(20 => sub {
print("enter timer\n");
# Non-blocking parallel requests (should work inside a running
event loop according to the doc)
my $ua = Mojo::UserAgent->new;
my $delay = Mojo::IOLoop->delay(sub {
my ($delay, @titles) = @_;
print (Dumper(@titles));
});
for my $url ('mojolicio.us', 'cpan.org') {
my $end = $delay->begin(0);
$ua->get($url => sub {
my ($ua, $tx) = @_;
$end->($tx->res->dom->at('title')->text);
});
}
$delay->wait unless Mojo::IOLoop->is_running;
sleep(10);
print("leave timer\n");
});
}
but it does not work as expected, and I got a "Premature connection
close" error message for both http requests. I put the sleep(10); to
make sure I gave enough time for both requests to get through, but
that doesn't help.
What I am missing or doing wrong?
Best Regards.
Vincent
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