CODEWITHSUNDEEP
javascriptregexfilepath
postalservice14
postalservice14

Reputation: 2534

Regex for file path validation in javascript

I can't seem to find a Regular Expression for JavaScript that will test for the following cases:

You can see what I am going for. I just need it to validate a file path. But it seems like all the expressions I have found don't work for JavaScript.

Upvotes: 6

Views: 31083

Answers (5)

Cjxcz Odjcayrwl
Cjxcz Odjcayrwl

Reputation: 22867

I've found an example here: http://regexlib.com/Search.aspx?k=file+name&AspxAutoDetectCookieSupport=1 and I've modified it to match pathes starting with '\':

^((([a-zA-Z]:|\\)\\)|(\\))?(((\.)|(\.\.)|([^\\/:\*\?"\|<>\. ](([^\\/:\*\?"\|<>\. ])|([^\\/:\*\?"\|<>]*[^\\/:\*\?"\|<>\. ]))?))\\)*[^\\/:\*\?"\|<>\. ](([^\\/:\*\?"\|<>\. ])|([^\\/:\*\?"\|<>]*[^\\/:\*\?"\|<>\. ]))?$

This is clear-regex unescaped version with is easier to read (really!).

It matches pathes like:

  • c:\temp
  • \temp
  • ..\my folder
  • üöä

etc.

Upvotes: 1

Kiran Kumar
Kiran Kumar

Reputation: 49

Here is the Windows path validation, it's works fine for all windows path rules.

var contPathWin = document.editConf.containerPathWin.value;

if(contPathWin=="" || !windowsPathValidation(contPathWin))
{
    alert("please enter valid path");
    return false;
}

function windowsPathValidation(contwinpath)
{
    if((contwinpath.charAt(0) != "\\" || contwinpath.charAt(1) != "\\") || (contwinpath.charAt(0) != "/" || contwinpath.charAt(1) != "/"))
    {
       if(!contwinpath.charAt(0).match(/^[a-zA-Z]/))  
       {
            return false;
       }
       if(!contwinpath.charAt(1).match(/^[:]/) || !contwinpath.charAt(2).match(/^[\/\\]/))
       {
           return false;
       } 

}

and this is for linux path validation.

var contPathLinux = document.addSvmEncryption.containerPathLinux.value;

if(contPathLinux=="" || !linuxPathValidation(contPathLinux))
{
    alert("please enter valid path");
    return false;
}

function linuxPathValidation(contPathLinux)
{
    for(var k=0;k<contPathLinux.length;k++){
        if(contPathLinux.charAt(k).match(/^[\\]$/) ){
            return false;
        }
    }
    if(contPathLinux.charAt(0) != "/")
    {
        return false;
    }
    if(contPathLinux.charAt(0) == "/" && contPathLinux.charAt(1) == "/")
    {
        return false;
    }
    return true;
}

Try to make it in a single condition.

Upvotes: 4

Kevin Peno
Kevin Peno

Reputation: 9206

I think this will work:

var reg = new RegExp("^(?>[a-z]:)?(?>\\|/)?([^\\/?%*:|\"<>\r\n]+(?>\\|/)?)+$", "i");

I've just excluded all(?) invalid characters in filenames. Should work with international filenames (I dunno) as well as any OS path type (with the exceptions noted below).

Upvotes: 1

Gaim
Gaim

Reputation: 6844

Try this:

([a-zA-Z]:)?(\\[a-zA-Z0-9_-]+)+\\?

EDIT:

@Bart made me think about this regexp. This one should work nice for windows' paths.

^([a-zA-Z]:)?(\\[^<>:"/\\|?*]+)+\\?$

Upvotes: 1

Rubens Farias
Rubens Farias

Reputation: 57996

You could start with:

^([a-zA-Z]:)?(\\[a-zA-Z0-9_\-]+)+\\?

This matches all your samples.

Upvotes: 0

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