202202 Accepted
The request has been accepted for processing, but the processing has not been completed yet.
303The response to the request can be found at a different URL using a GET method.
After processing a POST, PUT, or DELETE, the server redirects the client to a different URL that should be fetched with GET. This is the standard Post/Redirect/Get pattern to prevent form resubmission.
Follow the redirect using a GET request to the URL in the Location header. If you are building a form, this pattern prevents duplicate submissions when users refresh the page.
202The request has been accepted for processing, but the processing has not been completed yet.
308The resource has permanently moved to a new URL, and the request method must not change when following the redirect.
502A gateway or proxy server received an invalid response from the upstream server.
417The server cannot meet the expectation specified in the Expect request header.
102The server has received and is processing the request, but no response is available yet (WebDAV).
520Cloudflare received an unexpected or empty response from the origin server.