JavaScript realpath
Return the resolved path
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 2526 27 28 29 3031 32 33 34 3536 37 38 39 4041 42 43 44 4546 47 48 49 5051 52 53 54 55 | function realpath (path) { // Return the resolved path // // version: 909.322 // discuss at: http://phpjs.org/functions/realpath // + original by: mk.keck // + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net) // % note 1: Returned path is an url like e.g. 'http://yourhost.tld/path/' // * example 1: realpath('../.././_supporters/pj_test_supportfile_1.htm'); // * returns 1: 'file:/home/kevin/workspace/_supporters/pj_test_supportfile_1.htm' var p = 0, arr = []; /* Save the root, if not given */ var r = this.window.location.href; /* Avoid input failures */ path = (path + '').replace('\\', '/'); /* Check if there's a port in path (like 'http://') */ if (path.indexOf('://') !== -1) { p = 1; } /* Ok, there's not a port in path, so let's take the root */ if (!p) { path = r.substring(0, r.lastIndexOf('/') + 1) + path; } /* Explode the given path into it's parts */ arr = path.split('/'); /* The path is an array now */ path = []; /* Foreach part make a check */ for (var k in arr) { /* This is'nt really interesting */ if (arr[k] == '.') { continue; } /* This reduces the realpath */ if (arr[k] == '..') { /* But only if there more than 3 parts in the path-array. * The first three parts are for the uri */ if (path.length > 3) { path.pop(); } } /* This adds parts to the realpath */ else { /* But only if the part is not empty or the uri * (the first three parts ar needed) was not * saved */ if ((path.length < 2) || (arr[k] !== '')) { path.push(arr[k]); } } } /* Returns the absloute path as a string */ return path.join('/'); } |
Examples
Running
1 | realpath('../.././_supporters/pj_test_supportfile_1.htm'); |
Should return
1 | 'file:/home/kevin/workspace/_supporters/pj_test_supportfile_1.htm' |
Dependencies
No dependencies, you can use this function standalone.
Open syntax issues
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Authors
Thanks to the following developers, you get to have realpath goodness in JavaScript.
cuisdy
19 Oct '09 
No laughing at me, please...
Where it said "letsGo" it should say "letsStart". It's just the most silly variable name I could come up with, I know.
cuisdy
19 Oct '09
Hi there, thanks for that script.
However, I was looking for a path resolver that would return a relative path resolved, not an absolute path resolved. I decided to do one myself and it works for me (though I haven't tested über weird inputs, so it's up for testing and improvements). Just in case someone wants it, here it is:
(hope it posts the code nicely formatted hehe)
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 20 | function resolvePath( sPath ){ sPath = sPath.replace(/\\/g,'/'); // Linux compatible sPath = sPath.replace(/\/\//g,'/'); // Fix double bars var aPathParts = sPath.split('/'); // Get parts of the path for( var i=0, letsStart, sPart ; sPart = aPathParts[i] ; i++ ){ if( sPart != '..' ){ letsGo = true; continue; }; if( letsStart && sPart == '..' ){ aPathParts.splice((i-1),2); i=i-2; } }; return aPathParts.join('/'); }; |
Does PHP have a function like this, by the way?
Kevin van Zonneveld
25 Oct '09