backups: ssh remotes: Refactoring

- Make url scheme consistent
- Add an FA icon to the drop-down button in VerifySshHostkeyView
- Refactoring to reduce code duplication

Signed-off-by: Joseph Nuthalapati <njoseph@thoughtworks.com>

plinth/modules/backups/templates/verify_ssh_hostkey.html

@@ -31,12 +31,12 @@
 
     <p>
       The authenticity of host {{ hostname }} cannot be established.<br/>
-      The SSH server advertises the following public keys. Please verify any one of them.
+      The SSH host advertises the following public keys. Please verify any one of them.
     </p>
 
-    <div class="accordion">
+    <section>
       <p>
-        <a class="btn btn-default" data-toggle="collapse" href="#help" aria-expanded="false" aria-controls="footwear">{% trans "How to verify?" %}</a>
+        <a class="btn btn-default" data-toggle="collapse" href="#help" aria-expanded="false">{% trans "How to verify?" %}  <i class="fa fa-chevron-down fa-fw" aria-hidden="true"></i></a>
       </p>
       <div class="collapse" id="help">
         {% blocktrans trimmed %}
@@ -46,7 +46,7 @@
           <code>sudo ssh-keygen -lf /etc/ssh/ssh_host_rsa_key</code>
         </p>
       </div>
-    </div>
+    </section>
 
     {{ form|bootstrap }}
 

plinth/modules/backups/urls.py

@@ -26,16 +26,15 @@ from .views import (AddRepositoryView, CreateArchiveView, DeleteArchiveView,
                     UploadArchiveView, VerifySshHostkeyView, mount_repository,
                     umount_repository)
 
-# TODO Refactor path params to be more semantic
 urlpatterns = [
     url(r'^sys/backups/$', IndexView.as_view(), name='index'),
     url(r'^sys/backups/create/$', CreateArchiveView.as_view(), name='create'),
-    url(r'^sys/backups/download/(?P<uuid>[^/]+)/(?P<name>[^/]+)/$',
+    url(r'^sys/backups/(?P<uuid>[^/]+)/download/(?P<name>[^/]+)/$',
         DownloadArchiveView.as_view(), name='download'),
-    url(r'^sys/backups/delete/(?P<uuid>[^/]+)/(?P<name>[^/]+)/$',
+    url(r'^sys/backups/(?P<uuid>[^/]+)/delete/(?P<name>[^/]+)/$',
         DeleteArchiveView.as_view(), name='delete'),
     url(r'^sys/backups/upload/$', UploadArchiveView.as_view(), name='upload'),
-    url(r'^sys/backups/restore-archive/(?P<uuid>[^/]+)/(?P<name>[^/]+)/$',
+    url(r'^sys/backups/(?P<uuid>[^/]+)/restore-archive/(?P<name>[^/]+)/$',
         RestoreArchiveView.as_view(), name='restore-archive'),
     url(r'^sys/backups/restore-from-upload/$', RestoreFromUploadView.as_view(),
         name='restore-from-upload'),

plinth/modules/backups/views.py

@@ -282,8 +282,11 @@ class AddRepositoryView(SuccessMessageMixin, FormView):
             _, hostname, _ = re.split('[@:]', path)
             credentials = _get_credentials(form.cleaned_data)
             if not self._is_ssh_hostkey_verified(hostname):
-                repository = SshBorgRepository(path=path,
+                # Cannot mount at this point because we cannot connect
-                                               credentials=credentials)
+                # and validate the directory.
+                repository = SshBorgRepository(
+                    path=path, credentials=credentials, automount=False)
+                # Save for now, verify in the next view
                 repository.save(verified=False)
                 uuid = repository.uuid
                 url = reverse('backups:verify-ssh-hostkey', args=[uuid])
@@ -296,12 +299,9 @@ class AddRepositoryView(SuccessMessageMixin, FormView):
                     context_data = self.get_context_data()
                     context_data['form'] = form
                     return render(request, self.template_name, context_data)
-                try:
+
-                    repository.get_info()
+                _create_borg_repository(repository,
-                except BorgRepositoryDoesNotExistError:
+                                        form.cleaned_data['encryption'])
-                    repository.create_repository(
-                        form.cleaned_data['encryption'])
-                repository.save()
                 return redirect(self.success_url)
         else:
             context_data = self.get_context_data()
@@ -382,16 +382,23 @@ class VerifySshHostkeyView(SuccessMessageMixin, FormView):
                                                      uuid=uuid)
         except ValidationError as err:
             messages.error(self.request, err.message)
+            # If a ValidationError is thrown, delete the repository
+            # so that the user can have another go at creating it.
             network_storage.delete(uuid)
             return redirect(reverse_lazy('backups:repository-add'))
-        try:
+        _create_borg_repository(repository, repo_data.get(
-            repository.get_info()
+            'encryption', 'none'))
-        except BorgRepositoryDoesNotExistError:
-            repository.create_repository(repo_data.get('encryption', 'none'))
-        repository.save()
         return super().form_valid(form)
 
 
+def _create_borg_repository(repository, encryption='none'):
+    try:
+        repository.get_info()
+    except BorgRepositoryDoesNotExistError:
+        repository.create_repository(encryption)
+    repository.save()
+
+
 def _get_credentials(data):
     credentials = {}
     for field_name in ["ssh_password", "encryption_passphrase"]:
@@ -421,7 +428,7 @@ def _validate_remote_repository(path, credentials, uuid=None):
     try:
         ssh_client.connect(hostname, username=username, password=password)
     except Exception as err:
-        msg = _('Accessing the remote repository failed. Details: %(err)s')
+        msg = _(f'Accessing the remote repository failed. Details: {err}')
         raise ValidationError(msg, params={'err': str(err)})
     else:
         sftp_client = ssh_client.open_sftp()