Redirecting with a 201 created

问题:

Is there a way to redirect through a 201 answer?

The RFC specifies that the newly created resource must be specified in the Location header, and I do specify it. I assumed that the browser would redirect but it doesn't, even if the page has no content.

I want the user, after the POST action, to get redirected to the new resource. I'm therefore tempted to use 303 See Other but a 201 seems more appropriate.

So, is there any way to automatically redirect popular browsers without user intervention and without relying on Javascript?

回答1:

I think you're confusing two different semantic responses - one is telling the client that you successfully created a resource, and where it is. Whether the client goes to fetch it or not is a different story.

The second is telling the client that it has sent the wrong location URI for a resource it's requesting - and that it should try again, but with a different URI.

A 303 is appropriate in this case - in fact, it's explicitly recommended for this:

(from rfc)

It is primarily used to allow the output of a POST action to redirect the user agent to a selected resource, since doing so provides the information corresponding to the POST response in a form that can be separately identified, bookmarked, and cached, independent of the original request.

回答2:

The browser will enact a redirect action through one of the 3xx status codes, the specification doesn't define that a user agent must redirect with a 201. You could try sending a refresh header to see if it forces a redirect to the Location header, but I wouldn't count on it. Why not stick with a 3xx response?

回答3:

You could send a Refresh header.

回答4:

I am dealing with this for the first time, and this is what I have decided to do:

• GET /user/new -> 200 Ok with user registration form.
• POST /user -> 201 Created a new user, respond with the same content as the GET /user route.
• GET /user -> 200 Ok with the user profile page for the authenticated user, or, for anonymous visitors, 307 Temporary Redirect to /login, which links to /user/new.

update

I have found out that this is a bad idea, because if the user refreshes the page that was rendered as a response for POST /user, they resend the post data. I will leave the answer here in case anyone else has the same brilliant idea.