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Redirect Code in .NET Core

There are four Redirect help methods built into your .NET Core Controllers that you can use to tell a client that a resource exists ... but not at this URL. For all these cases, you should also be setting your response's Location header to tell the client where to find the result the client originally requested.

The helper methods and when to use them are:

  • Redirect: This returns an HTTP 302 status code. This status code tells the client that what they requested can be found at the URL specified in the Location header of the response. However, that resource might be at this URL at some time in the future. If the original request was a POST, it's OK for the client to change that to a GET Request before using the new URL.
  • RedirectPermanent: HTTP 301 status code. This code tells the client that the resource won't ever exist at this URL. The Location header should contain a URL that will give the client something like what they requested if a new request is made to that URL. For anything but GET requests, the user should be informed before a request is made to the new URL. As with Redirect, if the original request was a POST, it's OK for the client to change that to a GET Request before using the new URL.
  • RedirectPermanentPreserveMethod: HTTP 308 status. This says that the requested resource won't ever exist at this URL. However, this code also says that, if this was a POST request, the new request to to the URL specified in the Location header must also be a POST request.
  • RedirectPerserveMethod: HTTP 307 status. As with the original Redirect, this tells client that this redirect is temporary. As with the RedirectPermanentPreservice, this code also says that, if the original request was a POST request, the new request to the URL specified in the Location header must also be a POST request.

Posted by Peter Vogel on 02/25/2019 at 7:52 AM


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