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Date: Sat, 22 Dec 2012 16:01:33 +0100
Subject: Re: pygnomevfs get_local_path_from_uri replacement
From: Daniel Fetchinson <fetchinson@googlemail.com>
To: Python <python-list@python.org>
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>> Hi folks, I realize this is slightly off topic and maybe belongs to a
>> gnome email list but it's nevertheless python:
>>
>> I use an old python program that was written for gnome 2 and gtk 2 and
>> uses the function get_local_path_from_uri. More specifically it uses
>> gnomevfs.get_local_path_from_uri.
>>
>> Now with gnome 3 the module pygnomevfs does not exist anymore and
>> after checking the source for pygnomevfs it turns out it's written in
>> C using all the header files and stuff from gnome 2. So I can't just
>> lift it from the source. I was hoping it's pure python in which case I
>> could have simply lifted it.
>>
>> Does anyone know what a good replacement for get_local_path_from_uri
>> is? Is there a gtk/gnome/etc related python package that contains it
>> which would work with gnome 3? Or a totally gnome-independent python
>> implementation?
>
> The commit
> https://mail.gnome.org/archives/commits-list/2009-May/msg05733.html
> suggests that get_local_path_from_uri() might have been defined as
> (taking slight liberties):
>     gnome_vfs_unescape_string(remove_host_from_uri(uri))
> Assuming these functions do the "obvious" things implied by their
> names (you can probably chase down the Gnome VFS source or docs to
> check; I don't care enough to bother), given a general URI
> "protocol://host/path", it presumably returns either
> "protocol:///path" (`protocol:` likely being "file:" in this case) or
> "/path", in either case with `path` having been un-percent-escaped.
> The latter transform can be done using
> http://docs.python.org/2/library/urllib.html#urllib.unquote
>
> Alternately, you might call the Gnome VFS C API directly via
> http://docs.python.org/2/library/ctypes.html

Thanks, ctypes is actually a great idea, I should have thought about that.
In the meantime I use the simple function

def get_local_path_from_uri( uri ):

    return uri.split( '//' )[1]


and it seems to work. In the program the function is always called in
a try: except: block so if anything is not okay it will get caught, I
don't have to catch exceptions inside the function.

Cheers,
Daniel



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