server information tool

rishirajsingh

I want to design a tool that can provide server information of a website for users.
User have to enter only url of website and they can see the details of the hosting server like its hosted on IIS server or Apache server and all other details possible to extract. I have searched in hotscripts and other php scripts site but didn't get what i was looking for?
Can any one tell me how to proceed or give me link to any script if available?

bpat1434

I don't know of any script available to do this. For one, PHP would have to FTP into the server, set up a phpinfo() then call it and capture the output and then display the info you want. Allowing that type of access is a security issue.

The only information you could get is if you looked for a page that wasn't there and got the server 404 page. But good server should have a 404 page set up to hide some of this info.

I honestly don't think you're going to find anything.

etully

When you make an HTTP request, the headers on the response will tell you an enormous amount of information about the server. This is how http://www.netcraft.com is able to find out so much information about your server.

So like Netcraft, you just need to write a script to analyze the HTTP response headers. I don't know of any premade scripts to analyze the headers.

bpat1434

Ah, forgot about the headers.... but if you're going to do that, then you're better off using cURL to do the request, fetch the headers, and analyze. Or open a socket with fsockopen to the address, push an HTTP/1.0 GET for a page, and see what the headers send back.

But even then some servers can deviate and hide certain things. Like what system they're running on, or even send different headers based on the browser requesting them. So header's aren't 100% full-proof. But it's a start.

rishirajsingh

I think it can be done by finding server headers.
I want to have something like this for my users
http://www.seovalley.com/seo-tools/server-header-checker.htm
http://www.seovalley.com/seo-tools/ip-address-checker.htm
http://www.seovalley.com/seo-tools/hosting-server-type-checker.htm
but i am not able to find any script for this, I am not even getting clue how to start?
thanks

bpat1434

It's just a matter of using cURL (or fsockopen) to and capturing the headers "curl_setopt, CURLOPT_HEADERS, true" or just appending the result of fread($fh) and then outputting the headers.

rishirajsingh

Is there any other alternative apart from using curl?
I found this script on net is it right way to proceed?

#############

function remote_file_exists($url)
{
$head = "";
$url_p = parse_url($url);

if (isset ($url_p["host"]))
{
$host = $url_p["host"];
}
else
{
return FALSE;
}

if (isset ($url_p["path"]))
{
$path = $url_p["path"];
}
else
{
$path = "";
}

$fp = fsockopen ($host, 80, $errno, $errstr, 20);
if (!$fp)
{
return FALSE;
}
else
{
$parse = parse_url($url);
$host = $parse['host'];

fputs($fp, "HEAD ".$url." HTTP/1.1\r\n");
fputs($fp, "HOST: ".$host."\r\n");
fputs($fp, "Connection: close\r\n\r\n");
$headers = "";
while (!feof ($fp))
{
$headers .= fgets ($fp, 128);
}
}
fclose ($fp);
echo htmlentities($headers);


if(ereg("200 OK", $headers, $regs))
{
print "200 = OK";
}
else
{
print "not 200";
}
}
$url = "http://www.google.co.uk";
remote_file_exists($url);
?>

bpat1434 wrote:
It's just a matter of using cURL (or fsockopen) to and capturing the headers "curl_setopt, CURLOPT_HEADERS, true" or just appending the result of fread($fh) and then outputting the headers.

I didn't get you "bpat1434"
can you explain me in little more detail.

etully

Try this from a Unix Command line:

telnet www.someserver.com 80

(wait for response)

GET / HTTP/1.0
<press enter twice>

(wait for response)

Read the headers, notice the Operating System is listed there. As bpat said, if you want to do that in PHP, you can use curl or fsockopen.

bpat1434

You'd have to use fputs and use:
GET / HTTP/1.0

then just grab the headers from the response.... Here's something I whipped up real quick. It kinda works. Needs a little tweaking though... but this should get you going in the right direction...

<?php

$output = '<html>
<head>
	<title>Server Information 101</title>
	<style type="text/css"><!--
		#wrapper{width:800px;margin:10px auto;padding:0;border:1px solid #000;}
		#message{width:800px;margin:0 0 15px 0;padding:0;border-bottom:1px solid #000;position:relative;float:left;}
		#message.error{background-color:#ff6a6a;color:#000;}
		#message.info{background-color:#eaeaae;color:#000;}
		#message h3{width:780px;text-align:left;position:relative;float:left;margin:10px;padding:0;}
		#message p{width:750px;text-align:left;position:relative;float:left;margin:0 25px 10px 25px;paddign:0;}
		#form{width:790px;margin:10px;padding:0;text-align:left;position:relative;float:left;}
		#clearer{clear:both;width:100%;height:0;visibility:hidden;}
	--></style>
</head>
<body>
<div id="wrapper">';

if(isset($_POST) && !empty($_POST) && isset($_POST['host']) && !empty($_POST['host']))
{
	$url = substr($_POST['host'], 0, 7) == 'http://' ? substr($_POST['host'], 7) : $_POST['host'];
	$url = substr($url, 0, 4) == 'www.' ? $url : 'www.'.$url;

$fh = @fsockopen($url, 80, $errno, $errstr, '20');

if($fh === false)
{
	$output .= '<div id="message" class="error"><h3>Connection Error</h3><p>An error occurred during connection to the server (<em>' . $url . '</em>).  The error returned was the following:<br />Error #' . $errno . ':<br />' . $errstr . '</p></div>';
}
else
{
	$output .= '<div id="message" class="info"><h3>Server Information For: <em>'. $url . '</em></h3>
<p style="white-space:pre;">';

	$tmp = '';

	$send = "GET / HTTP/1.0\r\n";
	$send .= "Host: " . substr($url, 4) . "\r\n";
	$send .= "Connection: Close\r\n";

	fwrite($fh, $send);
	while(!feof($fh))
		$tmp .= fgets($fh, 1024);

	@list($headers, $body) = @explode("\r\n\r\n", $tmp);

	$output .= $headers;

	$output .= '</div>';
}

@fclose($fh);
}

$output .= '<div id="form">
	<form action="' . $_SERVER['PHP_SELF'] . '" method="post">
		<label for="iHost">Web Server URL</label>:&nbsp;&nbsp;<input type="text" name="host" value="www." />&nbsp;&nbsp;
		<input type="submit" value="Go -->" name="submit" />
	</form>
</div>
<div id="clearer"></div>
</div>
</body>
</html>';

echo $output;
?>

etully

bpat, any guess where www.netcraft.com gets the information about PHP version and MySQL version? I thought I would see those in the HTTP headers but I don't.

bpat1434

Nope, no clue....