Restricting length of file name of the file to be uploaded in file browse.

Question

Hi,
I have got a file browse item. When the file name is more than 74 characters, it goes to an error page. Can this be avoided?
To prevent this, I tried using a javascript
function doSubmitWithProgress()
if (document.getElementById('P202_FILE_INPUT').value.length > 70){
alert('File name should be less than 70 characters in length.');
object.focus();
else
{$x_Hide('wwvFlowForm');
$x_Show('InProgress');
doSubmit('UPLOAD_FILE');
But this is considering the path of the file as well and hence causing an issue.
So could you please help me out with this issue.
If there is a way to avoid going to error page if file name is big that would be great. Otherwise, if there is a way to check just the length of the file name and trigger an alert if it is more than 70 characters, that would help me too.
Thanks,
Vignesh

Answer 1

The issue is that this code
  // Now create an array that contains the individual pieces of
  // the file name split on the "/" boundaries
  var myArray  = fileName.split('/');has the wrong path separator for Windows. Use backslash instead:
  // Now create an array that contains the individual pieces of
  // the file name split on the "\" boundaries
  var myArray  = fileName.split('\\');double backslash is necessary because '\' is the JavaScript escape character, so it needs to be doubled to indicate that that is the character we want.
However, also be aware that for security/privacy reasons recent versions of browsers do not expose the file path via the .value method. Firefox, Safari and Chrome only provide the filename. IE6 & IE7 yield the path in Windows format. IE8 and Opera, in an effort not to "break the web" (i.e. to bend over backwards to keep poorly coded and non-interoperable Windows sites working) have adopted an irritating approach of replacing the path with a wholly imaginary "C:\fakepath\".
So your validation may have to cope with up to 3 scenarios, depending on the browsers that need to be supported: only get the filename (FF/Safari/Chrome); get the full path (IE6/7/8 in some security configurations/older versions of all browsers); get a fake path (Opera/IE8 in other security configurations).
For more information see:
http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2009-March/018980.html
http://blogs.msdn.com/ie/archive/2009/03/20/rtm-platform-changes.aspx
(In 2009 MS are still concerned that pathname segments are limited to 8 characters?)