http-status-codes

I am implementing a simple registation/login module. While testing user credentials, I start thinking which HTTP status code will be appropriate, for the situation if a user send a request with incorrect credentials. At first, I thought 401 Unauthorized would be a nice status code, but it seems it will be better to use it when a user is trying to get some resource without authorisation. After, I switched to 409 Conflict This code is only allowed in situations where it is expected that the user might be able to resolve the conflict and resubmit the request. So, friends, please give me an advise

I have a page on my web site that reports on the health of the site and sets an HTTP 200 status code is everything is okay. This page is used by an external monitoring program to check that the site is up. When this page is hit, I make a very lightweight DB proc call to see if the DB is up and okay. If this fails, I want to return a meaningful HTTP error code to the monitor to let it know that all is not well. From what I can work out there's no HTTP status that says "a third party component that I rely on is down" so what what would you return in this case? 503 Service Unavailable...? I would

I am sending an http request from iOS (iPad/iPhone) to my python google app engine server using the NSURLConnection and NSURLRequest classes. How do I read the response's status, i.e. the value set by app engine using response.set_status(200, message="Success") for instance? I'm not able to find where I can read these status codes once I receive the NSURLConnection's connectionDidFinishLoading delegate call on the client end. The connection:didReceiveResponse: delegate method is called when a response is received, which gives you an NSURLResponse to play with. If you've made an HTTP request,

Using ASP.NET MVC 5, I would like to return appropriate HTTP status code for different scenarios (401 for user is not authenticated, 403 when user has no right for some resource, etc.), than handle them in jQuery. But the problem is, when I try to return 401, it always returns "302: Found". What is the trick for a custom status code, and why this doesn't work? public ActionResult My() { if (User.Identity.IsAuthenticated == false) { return new HttpStatusCodeResult(401, "User is not authenticated."); // Returns "302: Found" } // ... other code ... } EDIT 1: Interesting bit: If I replace the 401

A common scenario for a web app is to redirect after a POST that modifies the database. Like redirecting to the newly created database object after the user creates it. It seems like most web apps use 302 redirects, but 303 seems to be the correct thing to do according to the specification if you want the url specified in the redirect to be fetched with GET. Technically, with a 302, the browser is supposed to fetch the specified url with the same method that the original url was fetched with, which would be POST. Most browsers don't do that though. 302 - http://www.w3.org/Protocols/rfc2616