No 'Access-Control-Allow-Origin' header causes error in Linked Data Browser

[bhaugen]

We tried NRP jsonld error in @ahdinosaur 's Linked Data Browser

http://dinosaur.is/linked-data-browser/?focusId=http%3A%2F%2Fnrp.webfactional.com%2Faccounting%2Fagent-jsonld%2F

focus @id:
http://nrp.webfactional.com/accounting/agent-jsonld/

we get this error:

Fetch API cannot load http://nrp.webfactional.com/accounting/agent-jsonld/. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://dinosaur.is' is therefore not allowed access.

We'll add the required header. This issue is just to record the requirement. This is not a bug in the Linked Data Browser, just in the NRP jsonld feed. (Or so I think...)

[bhaugen]

@ahdinosaur - how do you get away with this re https://rawgit.com/valueflows/agent/master/examples/enspiral.jsonld ? I don't see any header there, either.

P.S. looks like this might be what we need to do:
https://github.com/ottoyiu/django-cors-headers

@ahdinosaur @fosterlynn does this make sense to you, or is there a simpler method? I plead ignorance on this topic, but it looks like something we need to do post-haste for what we want to do here...

Or @ahdinosaur - is it possible that your code is too strict? This is just a GET, right?

[ahdinosaur]

yeah nah, this is expected. CORS headers are necessary for a browser to communicate with a server at a different domain then where the page was loaded.

with curl -iL "https://rawgit.com/valueflows/agent/master/examples/enspiral.jsonld", i see Access-Control-Allow-Origin: * in the headers. rawgit.com seems to add the proper CORS headers, as opposed to raw.githubusercontent.

here's a resource on how to enable CORS on servers. for example, here's how i added CORS support to our valueflo.ws http server.

[bhaugen]

@ahdinosaur - you're right, I was thinking stupidly about it. I think that django app will do it for us, but we'll see.

[bhaugen]

Yay! It works now!
http://dinosaur.is/linked-data-browser/?viewId=nodeList&focusId=http%3A%2F%2Fnrp.webfactional.com%2Fapi%2Fagent-jsonld%2F

@ahdinosaur and all: note that the URL has changed. I moved all the jsonld stuff under /api/ instead of /accounting/