WebKit is caching content unnecessarily

[dylanmccall]

WebKit is caching content served by Kolibri. This is unnecessary, since we can expect Kolibri to respond very quickly to any requests, and the cost of maintaining this cache probably outweighs any benefit of having it.

[dylanmccall]

I thought the following patch might help. Unfortunately, it seems that using DOCUMENT_BROWSER cache model also means cookies will not persist, so the user needs to sign in to Kolibri every time they open the app.

diff --git a/src/kolibri_gnome/desktop_launcher/application.py b/src/kolibri_gnome/desktop_launcher/application.py
index 5a5ced7..e195c64 100644
--- a/src/kolibri_gnome/desktop_launcher/application.py
+++ b/src/kolibri_gnome/desktop_launcher/application.py
@@ -22,6 +22,7 @@ import gi
 
 from gi.repository import GLib
 from gi.repository import Gtk
+from gi.repository import WebKit2
 
 from .. import config
 
@@ -296,6 +297,10 @@ class KolibriWindow(KolibriView):
         if KOLIBRI_APP_DEVELOPER_EXTRAS:
             self.gtk_webview.get_settings().set_enable_developer_extras(True)
 
+        self.gtk_webview.get_context().set_cache_model(
+            WebKit2.CacheModel.DOCUMENT_BROWSER
+        )
+
         self.gtk_webview.connect("create", self.__gtk_webview_on_create)
         self.gtk_webview.connect("notify::uri", self.__gtk_webview_on_notify_uri)
         self.gtk_webview.get_back_forward_list().connect(