Hack for opening arbitrary files in gnome using their default program

go2.py

#! /usr/bin/env python
# encoding: utf-8
# Written by Morten Minde Neergaard – m@8d.no
# Based on idea from http://therning.org/magnus/archives/251

"""
Open a file in a manner similar to gnome-open.
Fall back to using xdg-open.

Return code: The sum of all return codes given by the called programs.
"""

import gio
import os
import re
import subprocess
import sys

def call_opener(verbose, app, filename=None):
    if app is None:
        app = 'xdg-open %(file)s'

    filename = {'file': filename}

    app = [part % filename for part in app.split() if part]
    sys.stderr.write('> %s\n' % ' '.join(app))

    if verbose: print "calling", app

    return subprocess.call(app)

def open_files(verbose, *filenames):
    success = 0
    for filename in filenames:
        mime_app = None

        gfile = gio.File(filename)

        try:
            gapp = gfile.query_default_handler()
            mime_app = gapp.get_commandline()
            if verbose: print "gfile handler", gapp, mime_app
            mime_app = re.sub('%[uf]', '%(file)s', mime_app, flags=re.IGNORECASE)
            if not '%(file)s' in mime_app:
                mime_app += ' %(file)s'

        except gio.Error:
            try:
                mime_type = gfile.query_info('standard::*').get_content_type()
                mime_type = gio.content_type_get_mime_type(mime_type)
            except gio.Error:
                mime_type = gio.content_type_guess(filename)

            retcode = call_opener('/usr/bin/see --norun %(file)s', '%s:%s' %
                                        (mime_type, filename))
            if verbose: print "see --norun '%s:%s' returned %d" % (mime_type, filename, retcode)

            if retcode:
                retcode = call_opener('/usr/bin/see --norun %(file)s', filename)
                if not retcode:
                    mime_app = '/usr/bin/see %(file)s'
            else:
                mime_app = '/usr/bin/see %(file)s'
                if verbose: print "see --norun '%s:%s' returned %d" % (mime_type, filename, retcode)
                filename = '%s:%s' % (mime_type, filename)

        success += call_opener(verbose, mime_app, filename)

    return success

if __name__ == '__main__':
    verbose = False
    for arg in ['-v', '--verbose']:
        if arg in sys.argv:
            sys.argv.remove(arg)
            verbose = True

    sys.exit(open_files(verbose, *sys.argv[1:]))