Status codes

Connectors should return status codes in line with the HTTP spec. Here are some examples:

Code	Meaning
200	The connector was able to satisfy the request successfully.
400	The request was invalid.
401	The value provided in the Authorization header was invalid or missing.
404	The requested resource was not found.
500	The connector failed to satisfy the request through no fault of the client.

Headers

Header	Description
Content-Type	Always application/json.
X-Backend-Status	The status code returned by the backend if not a 2xx code. If this header is set then the connector's status code should be 400 if the backend has returned 401, otherwise 500.