What does HTTP 1 1 302 mean exactly

Question

Some article I read once said that it means jumping  from one URI to another   but I detected this  302  even when there was actually no jumping at all

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From RFC 2616  the Hypertext Transfer Protocol Specification     10 3 3 302 Found     The requested resource resides temporarily under a different URI     Since the redirection might be altered on occasion  the client SHOULD    continue to use the Request-URI for future requests   This response    is only cacheable if indicated by a Cache-Control or Expires header    field      The temporary URI SHOULD be given by the Location field in the    response  Unless the request method was HEAD  the entity of the    response SHOULD contain a short hypertext note with a hyperlink to    the new URI s     Source   http   www ietf org rfc rfc2616 txt

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The code 302 indicates a temporary redirection  One of the most notable features that differentiate it from a 301 redirect is that  in the case of 302 redirects  the strength of the SEO is not transferred to a new URL  This is because this redirection has been designed to be used when there is a need to redirect content to a page that will not be the definitive one  Thus  once the redirection is eliminated  the original page will not have lost its positioning in the Google search engine    EXAMPLE - Although it is not very common that we find ourselves in need of a 302 redirect  this option can be very useful in some cases  These are the most frequent cases    When we realize that there is some inappropriate content on a page  While we solve the problem  we can redirect the user to another page that may be of interest  In the event that an attack on our website requires the restoration of any of the pages  this redirect can help us minimize the incidence    A redirect 302 is a code that tells visitors of a specific URL that the page has been moved temporarily  directing them directly to the new location    In other words  redirect 302 is activated when Google robots or other search engines request to load a specific page  At that moment  thanks to this redirection  the server returns an automatic response indicating a new URL  In this way errors and annoyances are avoided both to search engines and users  guaranteeing smooth navigation    For More details Refer this Article

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A simple way of looking at HTTP 301 vs  302 redirects is   Suppose you have a bookmark to  http   sample com sample   You use a browser to go there   A 302 redirect to a different URL at this point would mean that you should keep your bookmark to  http   sample com sample   This is because the destination URL may change in the future   A 301 redirect to a different URL would mean that your bookmark should change to point to the new URL as it is a permanent redirect

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A 302 status code is HTTP response status code indicating that the requested resource has been temporarily moved to a different URI  Since the location or current redirection directive might be changed in the future  a client that receives a 302 Found response code should continue to use the original URI for future requests   An HTTP response with this status code will additionally provide a URL in the header field Location  This is an invitation to the user agent  e g  a web browser  to make a second  otherwise identical  request to the new URL specified in the location field  The end result is a redirection to the new URL

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First lets take a scenario how 301 and 302 works  301 -- gt  Permanently moved  Imagine there is some resource like -- gt  http   hashcodehub com user   now in future we are changing the resouce name to user- info -- gt  now the url should be  http   hashcodehub com user-info   -- gt  but the user is still trying to access the same URL -- gt  http   hashcodehub com user  -- gt  here from the backend we can redirect the user to the new url and send the status code as 301 -- gt  which is used for permanently moved  Above I have explained how 301 Works Lets understand how 302 will be used in real life  302 -- gt  Temporary redirection -- gt  here the complete url does not need to be changed but for some reason we are redirecting to resource at different locations  Here in the location header field we will give the value of the new resource url browser will again make the request to the resource url in the response location header field   302 can be used just in case if there is something not appropriate content on our page  While we solve that issue we can redirect all our used to some temporary url and fix the issue   It can also be used if there is some attach on the website and some pages requires restoration in that case also we can redirect the user to the different resource   The redirect 302 serves  for example  to have several versions of a homepage in different languages The main one can be in English  but if the visitors come from other countries then this system automatically redirects them to page in their language

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302 is a response indicating change of resource location -  Found    The url where the resource should be now located should be in the response  Location  header   The  jump  should be done by the requesting client  make a new request to the resource url in the response Location header field

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For anyone who might be curious about the naming  I m just going to add that it s probably called  Found  because the main resource e g   a private web page  the user intends to receive is not available at that moment e g   the user has not proved their identity yet   so instead the server has found a new resource that the user can receive which is a login page in the most common use case    Also it s  getting lost and found  in the hide-and-seek manner  meaning a lost resource under a 302 status is only lost temporarily  it is not supposed to be lost forever unless a player has some bad intentions

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A 302 redirect means that the page was temporarily moved  while a 301 means that it was permanently moved   301s are good for SEO value  while 302s aren t because 301s instruct clients to forget the value of the original URL  while the 302 keeps the value of the original and can thus potentially reduce the value by creating two  logically-distinct URLs that each produce the same content  search engines view them as distinct duplicates rather than a single resource with two names

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In the term of SEO   301 and 302 both are good it is depend on situation    If only one version can be returned  i e   the other redirects to it   that   s great  This behavior is beneficial because it reduces duplicate content  In the particular case of redirects to trailing slash URLs  our search results will likely show the version of the URL with the 200 response code  most often the trailing slash URL  -- regardless of whether the redirect was a 301 or 302

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This question was asked a long ago  while the RFC 2616 was still hanging around  Some answers to this question are based in such document  which is no longer relevant nowadays  Quoting Mark Nottingham who  at the time of writing  co-chairs the IETF HTTP and QUIC Working Groups      Don   t use RFC2616  Delete it from your hard drives  bookmarks  and burn  or responsibly recycle  any copies that are printed out    The old RFC 2616 has been supplanted by the following documents that  together  define the HTTP 1 1 protocol    RFC 7230  Message Syntax and Routing RFC 7231  Semantics and Content RFC 7232  Conditional Requests RFC 7233  Range Requests RFC 7234  Caching RFC 7235  Authentication   So I aim to provide an answer based in the RFC 7231 which is the current reference for HTTP 1 1 status codes   The 302 status code  A response with 302 is a common way of performing URL redirection  Along with the 302 status code  the response should include a Location header with a different URI  Such header will be parsed by the user agent and then perform the redirection         Web browsers may change from POST to GET in the subsequent request  If this behavior is undesired  the 307  Temporary Redirect  status code can be used instead   This is how the 302 status code is defined in the RFC 7231      6 4 3   302 Found      The 302  Found  status code indicates that the target resource      resides temporarily under a different URI   Since the redirection      might be altered on occasion  the client ought to continue to use the      effective request URI for future requests       The server SHOULD generate a Location header field in the response      containing a URI reference for the different URI   The user agent MAY      use the Location field value for automatic redirection   The server s      response payload usually contains a short hypertext note with a      hyperlink to the different URI s        Note  For historical reasons  a user agent MAY change the request         method from POST to GET for the subsequent request   If this         behavior is undesired  the 307  Temporary Redirect  status code         can be used instead    According to MDN web docs from Mozilla  a typical use case for 302 is      The Web page is temporarily not available for reasons that have not been unforeseen  That way  search engines don t update their links    Other status codes for redirection  The RFC 7231 defines the following status codes for redirection    301  Moved Permanently  302  Found  307  Temporary Redirect    The RFC 7238 was created to define another status code for redirection    308  Permanent Redirect    Refer to this answer for further details

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As per the http status code definitions a 302 indicates a  temporary  redirect   The requested resource resides temporarily under a different URI

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From Wikipedia      The HTTP response status code 302   Found is the most common way of   performing a redirection  It is an   example of industrial practice   contradicting the standard

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HTTP code 302 is for redirection see http   en wikipedia org wiki HTTP 302   It tells the browse reading a page to go somewhere else and load another page  Its usage is very common

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According to RFC 1945 Hypertext Transfer Protocol - HTTP   1 0      302 Moved Temporarily     The requested resource resides temporarily under a different URL     Since the redirection may be altered on occasion  the client should    continue to use the Request-URI for future requests      The URL must be given by the Location field in the response  Unless    it was a HEAD request  the Entity-Body of the response should    contain a short note with a hyperlink to the new URI s       If the 302 status code is received in response to a request using    the POST method  the user agent must not automatically redirect the    request unless it can be confirmed by the user  since this might    change the conditions under which the request was issued          Note  When automatically redirecting a POST request after        receiving a 302 status code  some existing user agents will        erroneously change it into a GET request

[http] What does HTTP/1.1 302 mean exactly?

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