The HyperText Transfer Protocol (HTTP)
401 Unauthorized client error status response
code indicates that the client request has not been completed because it lacks valid
authentication credentials for the requested resource.
This error status is sent with an HTTP
WWW-Authenticate response header that contains
information on how the client can request for the resource again after prompting the user for authentication credentials.
This error status is similar to the
403 Forbidden error status, except that in situations resulting in this error status, user authentication can allow access to the resource.
HTTP/1.1 401 Unauthorized Date: Wed, 21 Oct 2015 07:28:00 GMT WWW-Authenticate: Basic realm="Access to staging site"
|Hypertext Transfer Protocol (HTTP/1.1): Authentication (HTTP/1.1)|
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