This filter sets the HTTP status code on response messages. This enables an
administrator to ensure that a more meaningful response is sent to the client
in the case of an error or anomaly occurring in a configured policy.
For example, if a Relative Path filter fails, it may be useful
to return a 503 Service Unavailable response. Similarly, if a user
does not present identity credentials when attempting to access a protected resource,
you can configure the Enterprise Gateway to return a 401 Unauthorized response
to the client.
HTTP status codes are returned in the status-line of
an HTTP response. The following are some typical examples:
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HTTP/1.1 200 OK
HTTP/1.1 400 Bad Request
HTTP/1.1 500 Internal Server Error
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