Re: A sophisticated g_file resolve

[Alexander Larsson <alexl redhat com>]

On Wed, 2009-04-22 at 15:25 +0200, David Versmisse wrote:
> Hello,
> 
> I use gio via its Python's wrapper.
> 
> To manage simply all our URIs, i wrote this function:
> 
> class Folder
> ....
> 
>     def _get_g_file(self, uri):
>         if type(uri) is not str:
>             raise TypeError, 'unexpected "%s"' % repr(uri)
>         if self._folder is None:
>             return File(uri)
> 
>         return self._folder.resolve_relative_path(uri)
> 
> self._folder can be None => a new File with the given "uri"
> or can be a File => we must resolve the uri to it.
> 
> The problem that "uri" can be an absolute path, a relative path or an
> URI.
> resolve_relative_path(uri) doesn't work with by example:
> "file:///toto/tutu/".
> 
> How can i resolve my problem?
> Do you plan to implement a resolve_path_or_uri function ?
> Does this function already exists ?

In general it is not possible to do this. The basic problem is that
given a string of unknown type like "file:///foo/Bar" is both a valid
uri and a valid relative path.

So, any function like this would be a heuristic that you couldn't rely
on 100%. However, if you want to implement something like this the best
approach is probably to use the g_uri_parse_scheme() function on the
string, and if that returns non-null assume its a uri, otherwise use
resolve_relative_path.