TAXII urls should work with and without trailing slash

[MarkDavidson]

Currently a path of /services/discovery/ works, but /services/discovery does not. I think this is an easy typo to make and therefore the trailing slash should be optional (e.g., both paths should resolve to the discovery service.)

Note: This should also apply to the poll service and inbox services.

[gtback]

Hmmm, this is interesting. I would have thought the APPEND_SLASH setting would be to blame, but it appears to be set correctly.

[MarkDavidson]

Here's some info about APPEND_SLASH

When set to True, if the request URL does not match any of the patterns in the URLconf and it doesn’t end in a slash, an HTTP redirect is issued to the same URL with a slash appended. Note that the redirect may cause any data submitted in a POST request to be lost.

Even if that feature was working, TAXII is all POSTs, so we can't have POST data going missing. Also, I think I'd like to keep redirects to a minimum (as a practice). IMO the right thing to do is just change urls.py to make the trailing slash optional.

I'll go ahead and make the change.

[gtback]

This was the right fix. Looking back at the original issue, the problem was that the original request (for /services/discovery) WAS being redirected, but the client then was issuing a GET instead of a POST.

Note that the redirect may cause any data submitted in a POST request to be lost.

Making the slash optional in the url config allows either URL to work without a redirect.