File exists function

[draigGoch]

Can anyone tell me if there is a file exists method in javascript that I can use.

Example pseudo:

if myFile.exists
{
alert ("hello")
}

Thanks in advance

A computer always does what you tell it to, but rarely does what you want it to.....

 

[BillyRayPreachersSon]

Yes - but it is IE-only, as it relies on ActiveX:

var fsObj = new ActiveXObject('Scripting.FileSystemObject');
if (fso.FileExists('c:\\someFile.txt')) {
   alert('Yes!');
}

Hope this helps,
Dan

[tt]D'ya think I got where I am today because I dress like Peter Pan here?[/tt]

 

[BillyRayPreachersSon]

Oops - the "fso." in the second line should read "fsObj."

Dan


[tt]D'ya think I got where I am today because I dress like Peter Pan here?[/tt]

 

[draigGoch]

Thanks - Does this also work with web servers, eg:

myFile="../afile.html"

And also there isn't a cross-browser version is there?

A computer always does what you tell it to, but rarely does what you want it to.....

 

[BillyRayPreachersSon]

Do you mean:

1 "can the client-side script detect if files server-side",

2 "can the javascript be run server-side to detect files server-side", or

3 something else?

If 1, no - how could this ever work?
If 2, yes, assuming your server can run JS (e.g. IIS running ASP)

Dan



[tt]D'ya think I got where I am today because I dress like Peter Pan here?[/tt]

 

[draigGoch]

To be honest, I'm not quite sure what I'm trying to do.

On my website I use IFrames. There is a 'left' frame and an 'upd' frame. On the page (not in an IFrame) there is a link that will link the user to a page titled name+"S".

This is the code that I have got on OnClick on the link:

function changeIt()
{
var enwffeil = upd.location.href;
enwffeil = (enwffeil.replace(ffoldercychwyn,""));

var darnau = enwffeil.split(".");
enwffeil = darnau[0] + "S" + "." + darnau[1];

*****PSEUDO*****

if enwffeil exists then

enwffeil = upd.location.href;

end if

return enwffeil;

}

// -->

But the problem is, if for any reason that the name+"S" does not exist then it shows 404 in the frame!


A computer always does what you tell it to, but rarely does what you want it to.....

 

[CliveC]

If there is any way of detecting a 404 (maybe Billy Ray could help with that) then you could do the test in a small or hidden iframe.

Clive

http://tubularity.com

http://PalliativeCareConsulting.org

 

[BillyRayPreachersSon]

Making a custom 404 page server-side would be one option. You could possibly try setting a handler for the frame's onerror event, although I've never tried this.

Dan


[tt]D'ya think I got where I am today because I dress like Peter Pan here?[/tt]