Determining disk space on users machine

I would like to know if there is an applet out there or code that can be written to determine the amount of available disk space on a user's machine.

My web site needs to determine this for an installation within our intranet.

I was hoping to write this in ASP or javascript...but I figure that only a Java applet could do this.

Thanks in advance!
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I am afraid, Applet has restrictions in performing any System specific operations on the Client machine. For example, if you perform a function like
System.getProperty("") from Applet, it will throw a SecurityException.

Since, you have to perform installation from a Web page, you don't have control on the client machines. So, we can safely rule out the scope of a policy file which grants the necessary permissions.

You do have the option of 'Signed applets', which are authorized to do certain system specific functions on the client machine.
If you signed the applet, you can get it.

Runtime rt = Runtime.getRuntime();
String strDiskSpace = null;
Process p = null;
String strOS = System.getProperty( "" );
if( strOS.equals( "Windows NT" )){
p = rt.exec("cmd.exe /c dir c:\\" );
// Windows 95 , 98
p = rt.exec(" /c dir c:\\" );
InputStream inStream = p.getInputStream();
BufferedReader reader = new BufferedReader( new InputStreamReader( inStream));
String strTemp;
while( (strTemp = reader.readLine()) != null ){
strDiskSpace = strTemp;
System.out.println( strDiskSpace.trim() );
StringTokenizer sToken = new StringTokenizer( strDiskSpace.trim() , " " );
if( sToken.hasMoreTokens()){
System.out.println( "Free Space : " + sToken.nextToken() );
}catch( Exception e ){
System.out.println( e.getMessage());

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brdodgeAuthor Commented:
I'll give you 500 points if you can write this soon!
Introduction to Web Design

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brdodgeAuthor Commented:
I guess I can only give 300 thats as much as I'll give.
Asta CuTechnical consultant & graphic designCommented:
There is a 300 point limit per question.

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