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The IP to Country Database
  Forum Topics : Wish List / New Web Service at
Submitted by whooper on Thu, 04/08/2004 - 04:33.
It will be interesting to have a small utility script that tells us directly when was done the last modification of the CSV.ZIP file, something like


echo filemtime("/path/to/csv-file.zip");


Some will think to do that REMOTE, like


$URL ="http://ip-to-country.webhosting.info";
$fp = fsockopen($URL,80, $errno,$errstr,30);
if(!fp)
echo "$errstr($errno)\n";
else {
fputs($fp, "HEAD /path/to/csv-file.zip HTTP/1.0\r\n\r\n");
$match = array();
while(!feof($fp)) {
$line = fgets($fp,2280);
if (preg_match ('/^Last-Modified: (.+)$/i',$line,$match))
break;
}
fclose($fp);

if(count($match)>0)
$date = $match[1];
else
$date = " - unknown date - ";

// note that the time is GMT
echo $date."\n";
}


.. but in this case they'll need the /path/to/csv-file.zip thingie, which is actually unknown from afar'

There is another way, to parse directly the download page and extract the date from there .. but this will lead to some uneeded iNet trafic.

If that small script at the top can be implemented, please give us the link.

Thanks Alot!
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Hi Whooper, You dont really
Posted by amit on Fri, 04/09/2004 - 05:11.
Hi Whooper,

You dont really need to Parse our website to get the last updated date of the CSV file, you can simply open a URLConnection to the CSV file and checked the last modified date.

eg. check out HTTP headers returned by http://www.delorie.com/web/headers.cgi?url=http%3A%2F%2Fip-to-country.webhosting.info%2Fdownloads%2Fip-to-country.csv.zip

I have written a small PHP script that parses the HTTP headers and displays the last updated timestamp 
<?

function getRawHttpHeader($host,$doc)
{
   $httpheader = "";

   $fp = fsockopen ($host, 80, $errno, $errstr, 30);

   if (!$fp)
   {
      echo "$errstr ($errno) \n";
   }
   else
   {
      fputs ($fp, "GET $doc HTTP/1.0\r\nHost: " . $host. "\r\n\r\n");

      while (!feof($fp))
      {
       $httpresult = fgets ($fp,1024);
       $httpheader = $httpheader.$httpresult;
       if (ereg("^\r\n",$httpresult))
         break;
      }
      fclose ($fp);

   }

   return $httpheader;
}


function getArrayHttpHeader($url)
{
   $url = ereg_replace("http://","",$url);

   $endHostPos = strpos($url,"/");
   if (!$endHostPos)
      $endHostPos = strlen($url);

   $host = substr($url,0,$endHostPos);
   $doc = substr($url,$endHostPos,strlen($url)-$endHostPos);
   if ($doc=="")
      $doc = "/";

   $raw = getRawHttpHeader($host,$doc);
   $tmpArray = explode("\n",$raw);

   for ($i=0;$i<sizeof($tmpArray); $i++)
   {
      @list($name, $value) = explode(':', $tmpArray[$i], 2);
      $array[trim($name)]=trim($value);
   }

   return $array;
}


$array = (getArrayHttpHeader("http://ip-to-country.webhosting.info/downloads/ip-to-country.csv.zip"));
// print_r($array);

// Display last updated timestamp
echo date("j F Y",strtotime($array['Last-Modified']));

?>
-
Amit Bhawnani
another humble employee.
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Hello Amit, Thank you ver
Posted by whooper on Fri, 04/09/2004 - 09:19.
Hello Amit,

Thank you very much for your nice solution presented above. It seems that I need to review the HTTP RFC's .. and to implement a small script (running once a day), that sends me an email each time the CSV file is updated.

Thank you again,
whooper
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ASP VBScript
Posted by bttoso com on Fri, 09/17/2004 - 13:11.
How can this be done in ASP VBScript? I've been trying with HTTP Headers but still don't know how to make it work.

Thanks
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