If any client initiated action returns 404 re fetch courses.json and other files and try again with newly updated url.

[jamo]

If any client initiated action returns 404 re fetch courses.json and other files and try again with newly updated url.

eg. when submit url address is changed

[ljleppan]

When a HTTP request sent to the server returns 404, the client should re-fetch any and all .json files. This is because one possible cause for the 404 is the server paths changing and the new JSON files would reflect this.

[UMTti]

Cache should be implemented