Question

61

How do you convert a local URI to path?

rated 0 times [ 62] [ 1] / answers: 1 / hits: 24634 / 10 Years ago, fri, july 18, 2014, 12:00:00

How do you convert a local (filesystem) URI to path?

It can be done with nsIIOService + newURI() + QueryInterface(Components.interfaces.nsIFileURL) + file.path but that seems like a long way.

Is there a shorter way?

Here is an example code:

var aFileURL = 'file:///C:/path-to-local-file/root.png';

var ios = Components.classes[@mozilla.org/network/io-service;1]

              .getService(Components.interfaces.nsIIOService);

var url = ios.newURI(aFileURL, null, null); // url is a nsIURI



// file is a nsIFile    

var file = url.QueryInterface(Components.interfaces.nsIFileURL).file;



console.log(file.path); // C:path-to-local-fileroot.png

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jarod

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answered 10 Years ago noe · Accepted Answer

The supported way is actually what you're already doing. Write yourself a helper function if you find it too verbose. Of course, you can shorten it a bit using the various helpers.

const {classes: Cc, interfaces: Ci, utils: Cu} = Components;

Cu.import(resource://gre/Services.jsm);



var aFileURL = 'file:///C:/path-to-local-file/root.png';

var path = Services.io.newURI(aFileURL, null, null).

           QueryInterface(Ci.nsIFileURL).file.path;

Or:

const {classes: Cc, interfaces: Ci, utils: Cu} = Components;

Cu.import(resource://gre/modules/NetUtil.jsm);



var aFileURL = 'file:///C:/path-to-local-file/root.png';

var path = NetUtil.newURI(aFileURL).QueryInterface(Ci.nsIFileURL).file.path;