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** Branch linked: lp:software-properties

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https://bugs.launchpad.net/bugs/1381050

Title:
  "Import Key File" fails when the path of the file has special
  characters

Status in “software-properties” package in Ubuntu:
  Triaged

Bug description:
  The "Import Key File..." button in the "Authentication" tab fails
  silently when the path of the selected key file includes special
  characters.

  I'm using Ubuntu in Portuguese, so the "/home/$USER/Downloads" folder is named "/home/$USER/Transferências" here.
  Adding a key from that folder fails, but adding a key from "/home/$USER" (no special characters) succeeds.

  The problem is that, in
  softwareproperties/gtk/SoftwarePropertiesGtk.py in method
  SoftwarePropertiesGtk.add_key_clicked() at around line 952:

          if res == Gtk.ResponseType.ACCEPT:
              try:
                  if not self.backend.AddKey(chooser.get_filename()):
                      error(self.window_main,
                            _("Error importing selected file"),
                            _("The selected file may not be a GPG key file "
                              "or it might be corrupt."))
              except dbus.DBusException as e:
                  if e._dbus_error_name == 'com.ubuntu.SoftwareProperties.PermissionDeniedByPolicy':
                      logging.error("Authentication canceled, changes have not been saved")

  "self.backend.AddKey(chooser.get_filename())" throws a "org.freedesktop.DBus.Python.UnicodeEncodeError" exception for paths with special characters.
  This is probably a side effect of switching from Python 2 to 3 (and 'bytes' now being used in network communications where 'str' was previously used).

  Another issue is that the error isn't reported to the user, and it
  should be.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: software-properties-gtk 0.92.37.1
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Oct 14 13:22:21 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2014-10-13 (0 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: software-properties
  UpgradeStatus: No upgrade log present (probably fresh install)

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