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Usually this implies future availability (e.g., a new feature of a web-service API). 502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. 503 Service Unavailable The server cannot handle the request (because it is overloaded or down for maintenance). Generally, this is a ...
The HTTP response status code 302 Found is a common way of performing URL redirection. The HTTP/1.0 specification ( RFC 1945 ) initially defined this code, and gave it the description phrase "Moved Temporarily" rather than "Found".
302 Moved Temporarily The client should try at the address in the Contact field. If an Expires field is present, the client may cache the result for that period of time. [1]: §21.3.3 305 Use Proxy The Contact field details a proxy that must be used to access the requested destination. [1]: §21.3.4 380 Alternative Service
Moved temporarily; Moved permanently; or; Processed a request, e.g. a POSTed form, and is providing the result of that request at a different URI; To provide information about the location of a newly created resource. In this circumstance, the Location header should be sent with an HTTP status code of 201 or 202. [1]
URL hijacking is an off-domain redirect technique [3] that exploited the nature of the search engine's handling for temporary redirects. If a temporary redirect is encountered, search engines have to decide whether they assign the ranking value to the URL that initializes the redirect or to the redirect target URL.
it has no HTTP headers and lacks many other features that nowadays are required for minimal security reasons; it has not been widespread since 1999..2000 (because of HTTP/1.0 and HTTP/1.1) and is commonly used only by some very old network hardware, i.e. routers , etc.
If an entity is temporarily unavailable, this instructs the client to try again later. Value could be a specified period of time (in seconds) or a HTTP-date. [56] Example 1: Retry-After: 120; Example 2: Retry-After: Fri, 07 Nov 2014 23:59:59 GMT; Permanent RFC 9110: Server: A name for the server: Server: Apache/2.4.1 (Unix) Permanent RFC 9110 ...
307 Temporary Redirect: Like 302, but guarantees that the method and the body will not be changed when the redirected request is made. 303 See Other : Used when the result of a POST or another non-idempotent request method is a resource that should be retrieved using a GET.