How do I...set and send a custom User Agent name?

[s_shrum]

I'm attempting to write a publish plug-in for my wan2web.php project that will post updates to DynDNS.org. According to the documentation at DynDNS, all update requests must provide a unique user agent name.

How do I set / send a custom User Agent name. I tried setting:

[pre]$_SERVER[HTTP_USER_AGENT'] = "wan2web";[/pre]
...prior to the call below:

[pre]$result_code = file_get_contents($update_url);[/pre]
...where $update_url is "http://test:[e-mail]/nic/update?system=dyndns&hostname=test.homeip.net"

The $result_code received is 'badagent'. In fact, all calls I do return back 'badagent', even if I use a bad set of login credentials (which I was expecting 'badauth') which could just mean that DynDNS looks for a custom User Agent name before doing any processing.

Please help!!!

TIA

[planetsim]

You will have to set it into the headers. Not sure on the exact code for that.

[s_shrum]

I had to look everywhere and pull info from multiple sources to get this stuff to work. Since I don't believe that I'm the first to look into this, I'll provide the code snippet here. This also deals with HTTP authentication and passing parameters:

Code snippet from dyndns.php publishing plugin for wan2web.php (located at http://code.shrum.net)

// Construct the parameter sting	
$parameters = "system="  . $_REQUEST['p_system'];
$parameters .="&hostname=" . $_REQUEST['p_hostname'];
$parameters .="&myip=" . $numeric_ip;

$fp = fsockopen($_REQUEST['p_host'], 80, $errno, $errstr, 30);
if (!$fp) {
	echo "$errstr ($errno)";
} else {
	$header .= "GET " . $_REQUEST['p_url'] . " HTTP/1.0\r\n";
	$header .= "Host: " . $_REQUEST['p_host'] . "\r\n";
	$header .= "Authorization: Basic " . base64_encode($_REQUEST['p_user'] . ":" . $_REQUEST['p_pass']) . "\r\n"; 
	$header .= "User-Agent: WAN2WEB.PHP @ code.shrum.net\r\n";
	$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
	$header .= 'Content-Length: ' . strlen($parameters) . "\r\n\r\n";		
	if (!$fp) {
		echo "$errstr ($errno)";
	} else {
		fputs ($fp, $header . $parameters);
		while (!feof($fp)) { $result = fgets ($fp, 1024); }
	}
	fclose ($fp);
}

$result will contain the server response to the query. Make sure to change the user-agent to your own setting (dah).

Enjoy!