Entry

How do I check whether a file exists say c:\temp\MyFile.txt. in a client PC using Javascript

Jul 16th, 2004 14:22
Geir Pedersen, Jean-Bernard Valentaten, Prakash prakash,

Javascript has built in security that limits what files you can access. 
Basically this security works so that you can only access files on the 
same server as the Javascript was loaded from. If your users load the 
Javascript from your webserver, the Javascript can only open URLs/files 
on your webserver. Likewise, if the Javascript is loaded from the users 
local harddrive, the Javascript will be able to open files on the 
harddrive. 
The most general way to open a file from a Javascript is to use the DOM 
to create an Iframe, load the file into the Iframe and then access the 
content of the file via the DOM.