Socket Problem

coolkev

I'm developing an application on a Win2000/Apache configuration. I'm using fsockopen() to make the socket connection. When simulating one user running the script, it works fine, but if I simulate 2 or more users running at the same time, the script will lock up after about 30 seconds of use, and will remain locked up for about 5 minutes or so.

I've tried this same script on Linux, but get the same results.

I know the receiving server is fine, because I was able to write a PERL script that didn't have any problems at all.

Any help or suggestions would be great!

Thanks!

kparker

Say more. In particular, how about showing a condensed-down minimal code example that still exhibits the problem?

coolkev

Here's the function running the socket:

function sassocket() {
global $data;

$fp = fsockopen("xxx.xxx.xxx.xxx", 40200, &$errno, &$errstr);
if (!$fp) {
	echo "ERROR: $errno - $errstr<br>\n";
} else {
	fputs($fp,"$data\r\n");
    $SASResponse = fgets($fp, 100);
    fclose($fp);
}

return $SASResponse;
}

Thanks!

kparker

Darn, that's pretty minimal with not much room for bugs to hide! At least I am unable to see anything wrong here. :-(

kparker

You know, these high-level languages that hide all the dirty work don't necessarily all hide it in the same way. :-) What happens to your PHP example if you comment out the part that reads the response and just immediately close the socket instead? Does the server bog down even then? (I'm wondering if PHP and Perl implement the reading code differently, so that if the server doesn't close the socket--as a simple http server would--maybe the PHP code doesn't exit immediately if you haven't read the entire 100 chars asked for.)