return a 404 if no resource is found, also enable the JSON component when the server starts

deluge/ui/web/server.py

@@ -280,6 +280,9 @@ class LookupResource(resource.Resource, component.Component):
                 request.setHeader("content-type", mime_type[0])
                 return open(path, "rb").read()
         
+        request.setResponseCode(http.NOT_FOUND)
+        return "<h1>404 - Not Found</h1>"
+
 class TopLevel(resource.Resource):
     addSlash = True
 
@@ -503,6 +506,8 @@ class DelugeWeb(component.Component):
             self.start_normal()
         self.plugins.enable_plugins()
         
+        component.get("JSON").enable()
+
         if start_reactor:
             reactor.run()