| Subject: | Request for synchronization method to signal the TCP server is ready |
Various CGI application tests use HTTP::Server::Simple->new->background to prepare a server to run HTTP requests against. However neither backgrund() nor run() guarantee the TCP server is ready on when returning from the method:
sub background {
my $self = shift;
my $child = fork;
croak "Can't fork: $!" unless defined($child);
return $child if $child;
...
$self->run(@_); # should never return
exit; # just to be sure
}
This introduces a race condition which can cause spurious test failure. And can be easily reproduced by putting a sleep just before $self->run(@_) invocation in the background() code.
It would be useful if HTTP::Server::Simple introduced a new method or a parameter which provided a synchronization mechanism to signal to the application that the server is ready to accept TCP connections.
I think adding a countermeasures into each HTTP::Server::Simple application is not an effective way how to solve it. This augmenting HTTP::Server::Simple is better idea.