wireguard: Add action for QR code generation

Signed-off-by: Frederico Gomes <fredericojfgomes@gmail.com>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/wireguard/views.py

@@ -3,6 +3,7 @@
 Views for WireGuard application.
 """
 
+import segno
 import urllib.parse
 
 from django.contrib import messages
@@ -13,6 +14,8 @@ from django.urls import reverse_lazy
 from django.utils.translation import gettext as _
 from django.views.generic import FormView, TemplateView, View
 
+from io import BytesIO
+
 from plinth import network
 from plinth.modules.names.components import DomainName
 from plinth.views import AppView
@@ -122,6 +125,13 @@ class ClientActionsView(SessionClientDataMixin, View):
             response['Content-Disposition'] = \
                 'attachment; filename="wg-client.conf"'
             return response
+        elif self.action == 'qr':
+            qrcode = segno.make(config)
+            buffer = BytesIO()
+            qrcode.save(buffer, kind='svg', scale=5)
+
+            return HttpResponse(buffer.getvalue(),
+                                content_type='image/svg+xml')
 
         raise Http404("Invalid action")