Re: Relative URLs, and string encodings
Re: Relative URLs, and string encodings
- Subject: Re: Relative URLs, and string encodings
- From: Charles Srstka <email@hidden>
- Date: Mon, 24 Jul 2017 14:41:42 -0500
> On Jun 1, 2017, at 9:44 AM, Jonathan Taylor <email@hidden>
> wrote:
>
> Can anyone help me with the seemingly simple task of creating a relative
> NSURL for a filesystem object? The catch here (sorry!) is that I really do
> need backward compatibility to 10.7, which rules out
> fileURLWithFileSystemRepresentation:isDirectory:relativeToURL: (which I
> suspect is the “right” way of doing this).
>
> My attempt like:
> [NSURL URLWithString:[path
> stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]
> relativeToURL:relativeTo];
>
> This had been working ok for some time, but I have just found it to be broken
> for filenames containing unusual characters. In particular, it fails when
> given a filename containing a “smart quote” (not easily created directly with
> the keyboard, but auto-generated as part of a time machine backup, based on
> the machine name).
>
> Although I do not recall why I used
> stringByAddingPercentEscapesUsingEncoding, I think it must have been because
> it failed on some other filename pattern if I did not do that.
>
> String encodings is something I know basically nothing about, I am afraid. I
> am speculating that what is happening is that the fancy apostrophe is not
> ASCII and so my code does not work for that filename. I can change the
> encoding to NSUnicodeStringEncoding, and things seem ok, but I don’t know
> whether that will now definitely work for all filenames, or whether I have
> just stored up an even more obscure problem for the future.
>
> So, finally getting to two actual questions:
> 1. Will unicode encoding give me a robust solution here?
> 2. Is there a differnet, better way (pre-10.9) I should be using to create a
> relative URL?
>
> Thanks for any advice
> Jonny.
I’d construct a path using -[NSFileManager
stringWithFileSystemRepresentation:length:], then make a URL from that using
+[NSURL fileURLWithPath:].
Charles
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden