Error Statuscode= 401
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response. 10.1 Informational 1xx This class of status code indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty line. There are no required headers
Statuscode 401 Reasonphrase 'unauthorized'
for this class of status code. Since HTTP/1.0 did not define any 1xx http statuscode 401 status codes, servers MUST NOT send a 1xx response to an HTTP/1.0 client except under experimental conditions. A client MUST
401 Status Code
be prepared to accept one or more 1xx status responses prior to a regular response, even if the client does not expect a 100 (Continue) status message. Unexpected 1xx status responses MAY be ignored 401 vs 403 by a user agent. Proxies MUST forward 1xx responses, unless the connection between the proxy and its client has been closed, or unless the proxy itself requested the generation of the 1xx response. (For example, if a proxy adds a "Expect: 100-continue" field when it forwards a request, then it need not forward the corresponding 100 (Continue) response(s).) 10.1.1 100 Continue The client SHOULD continue with its request. 403 status code This interim response is used to inform the client that the initial part of the request has been received and has not yet been rejected by the server. The client SHOULD continue by sending the remainder of the request or, if the request has already been completed, ignore this response. The server MUST send a final response after the request has been completed. See section 8.2.3 for detailed discussion of the use and handling of this status code. 10.1.2 101 Switching Protocols The server understands and is willing to comply with the client's request, via the Upgrade message header field (section 14.42), for a change in the application protocol being used on this connection. The server will switch protocols to those defined by the response's Upgrade header field immediately after the empty line which terminates the 101 response. The protocol SHOULD be switched only when it is advantageous to do so. For example, switching to a newer version of HTTP is advantageous over older versions, and switching to a real-time, synchronous protocol might be advantageous when delivering resources that use such features. 10.2 Successful 2xx This class of status code indicates that the client's request was successfully received, understood, and accep
WWW-Authenticate header http 404 field1 containing at least one challenge applicable to the
Http Status Codes Cheat Sheet
target resource. If the request included authentication credentials, then the 401 response indicates that https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html authorization has been refused for those credentials. The user agent MAY repeat the request with a new or replaced Authorization header field2. If the 401 response contains the same https://httpstatuses.com/401 challenge as the prior response, and the user agent has already attempted authentication at least once, then the user agent SHOULD present the enclosed representation to the user, since it usually contains relevant diagnostic information. 1 WWW-Authenticate RFC7235 Section 4.1 2 Authorization RFC7235 Section 4.2 Source: RFC7235 Section 3.1 401 Code References Rails HTTP Status Symbol :unauthorized Go HTTP Status Constant http.StatusUnauthorized Symfony HTTP Status Constant Response::HTTP_UNAUTHORIZED Python2 HTTP Status Constant httplib.UNAUTHORIZED Python3+ HTTP Status Constant http.client.UNAUTHORIZED Python3.5+ HTTP Status Constant http.HTTPStatus.UNAUTHORIZED← Return to httpstatuses.com
ASP.NET Community Standup Forums Help Home/ASP.NET Forums/General ASP.NET/Configuration and Deployment/Custom Errors not working for StatusCodes 401, 403 Custom Errors not working for StatusCodes 401, 403 [Answered]RSS 3 replies https://forums.asp.net/t/next/1383324 Last post Feb 17, 2009 08:58 AM by TheStudlyTaco ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Reply TheStudlyTac... https://support.microsoft.com/en-us/kb/902160 None 0 Points 4 Posts Custom Errors not working for StatusCodes 401, 403 Feb 13, 2009 12:43 PM|TheStudlyTaco|LINK Hi. I'm trying to set up security and custom error pages in the web.config status code file of my web application, and I'm having issues with it. I'm wondering if anyone can help. My application is for a corporate intranet. Everyone has an account on the domain, so I'm using "Windows" authentication, and that way nobody will need to actually type in a user name or password. I then use role based authorization for my site and pages, and error statuscode= 401 the role provider is a custom one that I wrote that looks at some internal database to determine what roles our users are in. For the most part, these security settings work well. Authorized people see the pages, and unauthorized people can't. But there are two major usability issues I really need fixed to provide users with a good experience. I really wanted to put up a custom error page for users without access so that they don't see the ugly yellow "Server Error Unauthorized" page that ASP.Net makes by default. So I made a CustomErrors section in the web.config with redirects to my custom error page for 401 and 403 errors, but ASP .Net is not using them. It always just sends its own 401 unauthorized page (when I think it should be sending a 403 anyway, since these users are authenticated and simply aren't authorized to view the page). Closely related to this, and very irritating to me, is that when the a user isn't in an authorized role, the page sends back the 401 error and the browser raises a prompt for the user to authen
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