A client is written that uses a REST API to interact with a server.
Using HTTPS as the transport, an HTTP request is sent and received an HTTP response.
The response contains the HTTP response status code: 503 Service Unavailable.
Which action is the appropriate response?
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A. B. C. D.A.
The appropriate response to a 503 Service Unavailable HTTP response status code would be to look for a Retry-After header in the response and resend the request after the amount of time indicated.
A 503 Service Unavailable status code indicates that the server is currently unable to handle the request, often due to maintenance or overloading. This is a temporary condition, and the server expects the client to retry the request after some time.
In order to determine when to retry the request, the client should look for a Retry-After header in the response. This header may contain a number of seconds that the client should wait before retrying the request, or it may contain a specific date and time at which the client should retry the request.
Adding an Authorization header that supplies appropriate credentials would not be appropriate in this situation, as the issue is not related to authentication or authorization.
Resending the request using HTTP instead of HTTPS would not address the underlying issue, as the issue is with the server's ability to handle the request, not with the transport protocol.
Adding an Accept header that indicates the content types that the client understands would not address the underlying issue either, as the issue is with the server's ability to handle the request, not with the client's ability to understand the response.