add ability to clear the cache

barkshark_web/localweb/page/preferences.haml

@@ -101,6 +101,13 @@
 					=config_number('Port for the api server to listen on', 'bw_port', config.bw_port, 1024, 65535)
 					=config_checkbox('Use an external api server', 'bw_external', config.bw_external)
 
+		%details.category.section open
+			%summary << Maintenance
+			.container.grid-container
+				%span << Cache
+				%span
+				%a.button onclick='request("/action/clear-cache");' << Clear
+
 		%details.category.section open
 			%summary << Advanced
 			.container.grid-container

barkshark_web/protocol/local.py

@@ -75,6 +75,13 @@ def about(handler, request):
 	return request.page('about')
 
 
+### Actions ###
+@Local.route('/action/clear-cache')
+def action_clear_cache(handler, request):
+	handler.app.context.clear_cache()
+	return request.ok_or_redirect('Cleared cache')
+
+
 ### Bookmarks ###
 @Local.route('/bookmarks')
 def bookmarks_home(handler, request):