How to manage a redirect request after a jQuery Ajax call

Question

I m using   post   to call a servlet using Ajax and then using the resulting HTML fragment to replace a div element in the user s current page  However  if the session times out  the server sends a redirect directive to send the user to the login page  In this case  jQuery is replacing the div element with the contents of the login page  forcing the user s eyes to witness a rare scene indeed    How can I manage a redirect directive from an Ajax call with jQuery 1 2 6

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lt script gt      function showValues             var str      form   serialize              post  loginUser html            str          function responseText  responseStatus  responseXML               if responseStatus   success                    window location   adminIndex html                                         lt  script gt

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No browsers handle 301 and 302 responses correctly  And in fact the standard even says they should handle them  transparently  which is a MASSIVE headache for Ajax Library vendors  In Ra-Ajax we were forced into using HTTP response status code 278  just some  unused  success code  to handle transparently redirects from the server     This really annoys me  and if someone here have some  pull  in W3C I would appreciate that you could let W3C know that we really need to handle 301 and 302 codes ourselves

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I resolved this issue like this   Add a middleware to process response  if it is a redirect for an ajax request  change the response to a normal response with the redirect url   class AjaxRedirect object     def process response self  request  response       if request is ajax          if type response     HttpResponseRedirect          r   HttpResponse json dumps   redirect   response  Location              return r     return response   Then in ajaxComplete  if the response contains redirect  it must be a redirect  so change the browser s location      body   ajaxComplete function  e  xhr  settings       if  xhr status    200           var redirect   null         try              redirect     parseJSON xhr responseText  redirect             if  redirect                   window location href   redirect replace            next     window location pathname                         catch  e               return

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I just wanted to share my approach as this might it might help someone   I basically included a JavaScript module which handles the authentication stuff like displaying the username and also this case handling the redirect to the login page   My scenario  We basically have an ISA server in between which listens to all requests and responds with a 302 and a location header to our login page   In my JavaScript module my initial approach was something like    document  ajaxComplete function e  xhr  settings       if xhr status     302             check for location header and redirect                The problem  as many here already mentioned  is that the browser handles the redirect by itself wherefore my ajaxComplete callback got never called  but instead I got the response of the already redirected Login page which obviously was a status 200  The problem  how do you detect whether the successful 200 response is your actual login page or just some other arbitrary page    The solution  Since I was not able to capture 302 redirect responses  I added a LoginPage header on my login page which contained the url of the login page itself  In the module I now listen for the header and do a redirect   if xhr status     200       var loginPageRedirectHeader   xhr getResponseHeader  LoginPage        if loginPageRedirectHeader  amp  amp  loginPageRedirectHeader                  window location replace loginPageRedirectHeader                and that works like charm     You might wonder why I include the url in the LoginPage header   well basically because I found no way of determining the url of GET resulting from the automatic location redirect from the xhr object

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This problem may appear then using ASP NET MVC RedirectToAction method  To prevent form displaying the response in div you can simply do some kind of ajax response filter for incomming responses with   ajaxSetup  If the response contains MVC redirection you can evaluate this expression on JS side  Example code for JS below     ajaxSetup       dataFilter  function  data  type            if  data  amp  amp  typeof data     string                 if  data indexOf  window location    gt  -1                    eval data                                   return data              If data is   window location     Acount Login   above filter will catch that and evaluate to make the redirection instead of letting the data to be displayed

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While the answers seem to work for people if you re using Spring Security I have found extending LoginUrlAuthenticationEntryPoint and adding specific code to handle AJAX more robust   Most of the examples intercept all redirects not just authentication failures   This was undesirable for the project I work on   You may find the need to also extend ExceptionTranslationFilter and override the  sendStartAuthentication  method to remove the caching step if you don t want the failed AJAX request cached   Example AjaxAwareAuthenticationEntryPoint   public class AjaxAwareAuthenticationEntryPoint extends     LoginUrlAuthenticationEntryPoint        public AjaxAwareAuthenticationEntryPoint String loginUrl            super loginUrl               Override     public void commence HttpServletRequest request  HttpServletResponse response  AuthenticationException authException  throws IOException  ServletException           if  isAjax request                 response sendError HttpStatus UNAUTHORIZED value     Please re-authenticate yourself              else           super commence request  response  authException                        public static boolean isAjax HttpServletRequest request            return request    null  amp  amp   XMLHttpRequest  equals request getHeader  X-Requested-With               Sources  1  2

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I solved this by putting the following in my login php page    lt script type  text javascript  gt      if  top location href indexOf  login php      -1            top location href     login php          lt  script gt

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Finally  I solve the problem by adding a custom HTTP Header  Just before response for every request in server side  i add the current requested url to response s header   My application type on server is Asp Net MVC  and it has a good place to do it  in Global asax i implemented the Application EndRequest event so       public class MvcApplication   System Web HttpApplication                                         protected void Application EndRequest object sender  EventArgs e                        var app    HttpApplication sender              app Context Response Headers Add  CurrentUrl  app Context  Request CurrentExecutionFilePath                      It works perfect for me  Now in every response of the JQuery   post i have the requested url and also other response headers which comes as result of POST method by status 302  303         and other important thing is that there is no need to modify code on server side nor client side   and the next is the ability to get access to the other information of post action such errors  messages  and      In this way   I posted this  maybe help someone

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Some might find the below useful   I wanted clients to be redirected to the login page for any rest-action that is sent without an authorization token  Since all of my rest-actions are Ajax based  I needed a good generic way to redirect to the login page instead of handling the Ajax success function   This is what I ve done   On any Ajax request my server will return a Json 200 response  NEED TO AUTHENTICATE   if the client needs to authenticate    Simple example in Java  server side     Secured  Provider  Priority Priorities AUTHENTICATION  public class AuthenticationFilter implements ContainerRequestFilter        private final Logger m logger   LoggerFactory getLogger AuthenticationFilter class        public static final String COOKIE NAME    token cookie          Override     public void filter ContainerRequestContext context  throws IOException                      Check if it has a cookie          try               Map lt String  Cookie gt  cookies   context getCookies                 if   cookies containsKey COOKIE NAME                     m logger debug  No cookie set - redirect to login page                    throw new AuthenticationException                                    catch  AuthenticationException e                context abortWith Response ok    NEED TO AUTHENTICATE     type  json application   build                         In my Javascript I ve added the following code     ajaxPrefilter function options  originalOptions  jqXHR        var originalSuccess   options success       options success   function data            if  data     NEED TO AUTHENTICATE                 window location replace   login html                      else               originalSuccess data                                And that s about it

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I read this question and implemented the approach that has been stated regarding setting the response HTTP status code to 278 in order to avoid the browser transparently handling the redirects  Even though this worked  I was a little dissatisfied as it is a bit of a hack   After more digging around  I ditched this approach and used JSON  In this case  all responses to AJAX requests have the status code 200 and the body of the response contains a JSON object that is constructed on the server  The JavaScript on the client can then use the JSON object to decide what it needs to do   I had a similar problem to yours  I perform an AJAX request that has 2 possible responses  one that redirects the browser to a new page and one that replaces an existing HTML form on the current page with a new one  The jQuery code to do this looks something like     ajax       type   POST       url  reqUrl      data  reqBody      dataType   json       success  function data  textStatus            if  data redirect                   data redirect contains the string URL to redirect to             window location href   data redirect            else                  data form contains the HTML for the replacement form                 myform   replaceWith data form                         The JSON object  data  is constructed on the server to have 2 members  data redirect and data form  I found this approach to be much better

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I like Timmerz s method with a slight twist of lemon  If you ever get returned contentType of text html when you re expecting JSON  you are most likely being redirected  In my case  I just simply reload the page  and it gets redirected to the login page  Oh  and check that the jqXHR status is 200  which seems silly  because you are in the error function  right  Otherwise  legitimate error cases will force an iterative reload  oops     ajax     error   function  jqXHR  timeout  message        var contentType   jqXHR getResponseHeader  Content-Type        if  jqXHR status     200  amp  amp  contentType toLowerCase   indexOf  text html    gt   0               assume that our login has expired - reload our current page         window location reload

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If you also want to pass the values then you can also set the session variables and access  Eg   In your jsp you can write    lt   HttpSession ses   request getSession true      String temp request getAttribute  what you defined      gt    And then you can store this temp value in your javascript variable and play around

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Use the low-level   ajax   call     ajax     url    yourservlet     data         complete  function xmlHttp           xmlHttp is a XMLHttpRquest object     alert xmlHttp status             Try this for a redirect   if  xmlHttp code    200      top location href     some other page

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Putting together what Vladimir Prudnikov and Thomas Hansen said    Change your server-side code to detect if it s an XHR  If it is  set the response code of the redirect to 278  In django        if request is ajax          response status code   278    This makes the browser treat the response as a success  and hand it to your Javascript    In your JS  make sure the form submission is via Ajax  check the response code and redirect if needed         my-form   submit function event       event preventDefault         var options         url    this  attr  action        type   POST       complete  function response  textStatus              if  response status    278             window location   response getResponseHeader  Location                 else       your code here                   data    this  serialize                   ajax options

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lt script gt      function showValues             var str      form   serialize              post  loginUser html            str          function responseText  responseStatus  responseXML               if responseStatus   success                    window location   adminIndex html                                         lt  script gt

User · Answer

in the servlet you should put  response setStatus response SC MOVED PERMANENTLY   to send the  301  xmlHttp status you need for a redirection     and in the   ajax function you should not use the  toString   function     just  if  xmlHttp status    301        top location href    xxxx jsp      the problem is it is not very flexible  you can t decide where you want to redirect    redirecting through the servlets should be the best way  but i still can not find the right way to do it

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I just wanted to latch on to any ajax requests for the entire page   SuperG got me started  Here is what I ended up with      redirect ajax requests that are redirected  not found  404   or forbidden  403      body   bind  ajaxComplete   function event request settings           switch request status                case 301  case 404  case 403                                      window location replace  http   mysite tld login                    break                  I wanted to specifically check for certain http status codes to base my decision on  However  you can just bind to ajaxError to get anything other than success  200 only perhaps   I could have just written      body   bind  ajaxError   function event request settings       window location replace  http   mysite tld login

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I got a working solulion using the answers from  John and  Arpad  link and  RobWinch link  I use Spring Security 3 2 9 and jQuery 1 10 2   Extend Spring s class to cause 4XX response only from AJAX requests   public class CustomLoginUrlAuthenticationEntryPoint extends LoginUrlAuthenticationEntryPoint        public CustomLoginUrlAuthenticationEntryPoint final String loginFormUrl            super loginFormUrl                 For AJAX requests for user that isn t logged in  need to return 403 status         For normal requests  Spring does a  302  redirect to login jsp which the browser handles normally       Override     public void commence final HttpServletRequest request                           final HttpServletResponse response                           final AuthenticationException authException              throws IOException  ServletException           if   XMLHttpRequest  equals request getHeader  X-Requested-With                   response sendError HttpServletResponse SC FORBIDDEN   Access Denied              else               super commence request  response  authException                       applicationContext-security xml     lt security http auto-config  false  use-expressions  true  entry-point-ref  customAuthEntryPoint   gt       lt security form-login login-page   login jsp  default-target-url   index jsp                                                        authentication-failure-url   login jsp error true                             gt           lt security access-denied-handler error-page   errorPage jsp   gt        lt security logout logout-success-url   login jsp logout    gt           lt bean id  customAuthEntryPoint  class  com myapp utils CustomLoginUrlAuthenticationEntryPoint  scope  singleton  gt           lt constructor-arg value   login jsp    gt       lt  bean gt       lt bean id  requestCache  class  org springframework security web savedrequest HttpSessionRequestCache  gt       lt property name  requestMatcher  gt         lt bean class  org springframework security web util matcher NegatedRequestMatcher  gt           lt constructor-arg gt             lt bean class  org springframework security web util matcher MediaTypeRequestMatcher  gt               lt constructor-arg gt                 lt bean class  org springframework web accept HeaderContentNegotiationStrategy   gt               lt  constructor-arg gt               lt constructor-arg value    T org springframework http MediaType  APPLICATION JSON    gt               lt property name  useEquals  value  true   gt             lt  bean gt           lt  constructor-arg gt         lt  bean gt       lt  property gt   lt  bean gt    In my JSPs  add a global AJAX error handler as shown here       document   ajaxError function  event  jqxhr  settings  thrownError           if   jqxhr status     403               window location    login jsp           else             if thrownError    null                  alert thrownError               else                 alert  error                                Also  remove existing error handlers from AJAX calls in JSP pages           var str       viewForm   serialize              ajax               url   get mongoDB doc versions do               type   post               data  str              cache  false              async  false              dataType   json               success  function data                         error  function  jqXHR  textStatus  errorStr                       if textStatus    null                         alert textStatus                      else if errorStr    null                         alert errorStr                      else                        alert  error                                  I hope it helps others   Update1 I found that I needed to add the option  always-use-default-target  true   to the form-login config  This was needed since after an AJAX request gets redirected to the login page  due to expired session   Spring remembers the previous AJAX request and auto redirects to it after login  This causes the returned JSON to be displayed on the browser page  Of course  not what I want   Update2 Instead of using always-use-default-target  true   use  RobWinch example of blocking AJAX requests from the requstCache  This allows normal links to be redirected to their original target after login  but AJAX go to the home page after login

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Another solution I found  especially useful if you want to set a global behaviour  is to use the   ajaxsetup   method together with the statusCode property  Like others pointed out  don t use a redirect statuscode  3xx   instead use a 4xx statuscode and handle the redirect client-side     ajaxSetup      statusCode         400   function            window location                        Replace 400 with the statuscode you want to handle  Like already mentioned 401 Unauthorized could be a good idea  I use the 400 since it s very unspecific and I can use the 401 for more specific cases  like wrong login credentials   So instead of redirecting directly your backend should return a 4xx error-code when the session timed out and you you handle the redirect client-side  Works perfect for me even with frameworks like backbone js

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Additionally you will probably want to redirect user to the given in headers URL  So finally it will looks like this     ajax              other definition     complete function xmlHttp           if xmlHttp status toString   0    3            top location href   xmlHttp getResponseHeader  Location                UPD  Opps  Have the same task  but it not works  Doing this stuff  I ll show you solution when I ll find it

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The solution that was eventually implemented was to use a wrapper for the callback function of the Ajax call and in this wrapper check for the existence of a specific element on the returned HTML chunk  If the element was found then the wrapper executed a redirection  If not  the wrapper forwarded the call to the actual callback function    For example  our wrapper function was something like   function cbWrapper data  funct       if     myForm   data  length  gt  0          top location href  login htm    redirection     else         funct data       Then  when making the Ajax call we used something like     post  myAjaxHandler                     param1  foo          param2  bar                  function data              cbWrapper data  myActualCB                      html       This worked for us because all Ajax calls always returned HTML inside a DIV element that we use to replace a piece of the page  Also  we only needed to redirect to the login page

User · Answer

Use the low-level   ajax   call     ajax     url    yourservlet     data         complete  function xmlHttp           xmlHttp is a XMLHttpRquest object     alert xmlHttp status             Try this for a redirect   if  xmlHttp code    200      top location href     some other page

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Let me just quote again the problem as described by  Steg     I had a similar problem to yours  I perform an ajax request that has 2   possible responses  one that redirects the browser to a new page and   one that replaces an existing HTML form on the current page with a new   one    IMHO this is a real challenge and will have to be officially extended to the current HTTP standards   I believe the new Http Standard will be to use a new status-code  meaning  currently 301 302 tells the browser to go and fetch the content of this request to a new location   In the extended standard  it will say that if the response status  308  just an example   then the browser should redirect the main page to the location provided   That being said  I m inclined to already mimic this future behavior  and therefore when a document redirect is needed  I have the server respond as   status  204 No Content x-status  308 Document Redirect x-location   login html   When JS gets the  status  204   it checks for the existence of the x-status  308 header  and does a document redirect to the page provided in the location header   Does this make any sense to you

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No browsers handle 301 and 302 responses correctly  And in fact the standard even says they should handle them  transparently  which is a MASSIVE headache for Ajax Library vendors  In Ra-Ajax we were forced into using HTTP response status code 278  just some  unused  success code  to handle transparently redirects from the server     This really annoys me  and if someone here have some  pull  in W3C I would appreciate that you could let W3C know that we really need to handle 301 and 302 codes ourselves

User · Answer

I was having this problem on a django app I m tinkering with  disclaimer  I m tinkering to learn  and am in no way an expert   What I wanted to do was use jQuery ajax to send a DELETE request to a resource  delete it on the server side  then send a redirect back to  basically  the homepage  When I sent HttpResponseRedirect   the-redirect    from the python script  jQuery s ajax method was receiving 200 instead of 302  So  what I did was to send a response of 300 with   response   HttpResponse status  300   response  Location       the-redirect    return  response   Then I sent handled the request on the client with jQuery ajax like so    lt button onclick   the-jquery   gt Delete lt  button gt   where  the-jquery      ajax      type   DELETE      url    resource-url       complete  function jqxhr        window location   jqxhr getResponseHeader  Location                Maybe using 300 isn t  right   but at least it worked just like I wanted it to   PS  this was a huge pain to edit on the mobile version of SO  Stupid ISP put my service cancellation request through right when I was done with my answer

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You can also hook XMLHttpRequest send prototype  This will work for all sends  jQuery dojo etc  with one handler   I wrote this code to handle a 500 page expired error  but it should work just as well to trap a 200 redirect  Ready the wikipedia entry on XMLHttpRequest onreadystatechange about the meaning of readyState      Hook XMLHttpRequest var oldXMLHttpRequestSend   XMLHttpRequest prototype send   XMLHttpRequest prototype send   function         console dir  this       this onreadystatechange   function         if  this readyState    4  amp  amp  this status    500  amp  amp  this responseText indexOf  Expired      -1          try           document documentElement innerHTML   this responseText          catch error               IE makes document documentElement read only         document body innerHTML   this responseText                        oldXMLHttpRequestSend apply this  arguments

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this worked for me    success  function data  textStatus  xhr             console log xhr status       on success  ajax will get the same status code the browser gets from the server and execute it

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You can also hook XMLHttpRequest send prototype  This will work for all sends  jQuery dojo etc  with one handler   I wrote this code to handle a 500 page expired error  but it should work just as well to trap a 200 redirect  Ready the wikipedia entry on XMLHttpRequest onreadystatechange about the meaning of readyState      Hook XMLHttpRequest var oldXMLHttpRequestSend   XMLHttpRequest prototype send   XMLHttpRequest prototype send   function         console dir  this       this onreadystatechange   function         if  this readyState    4  amp  amp  this status    500  amp  amp  this responseText indexOf  Expired      -1          try           document documentElement innerHTML   this responseText          catch error               IE makes document documentElement read only         document body innerHTML   this responseText                        oldXMLHttpRequestSend apply this  arguments

User · Answer

I got a working solulion using the answers from  John and  Arpad  link and  RobWinch link  I use Spring Security 3 2 9 and jQuery 1 10 2   Extend Spring s class to cause 4XX response only from AJAX requests   public class CustomLoginUrlAuthenticationEntryPoint extends LoginUrlAuthenticationEntryPoint        public CustomLoginUrlAuthenticationEntryPoint final String loginFormUrl            super loginFormUrl                 For AJAX requests for user that isn t logged in  need to return 403 status         For normal requests  Spring does a  302  redirect to login jsp which the browser handles normally       Override     public void commence final HttpServletRequest request                           final HttpServletResponse response                           final AuthenticationException authException              throws IOException  ServletException           if   XMLHttpRequest  equals request getHeader  X-Requested-With                   response sendError HttpServletResponse SC FORBIDDEN   Access Denied              else               super commence request  response  authException                       applicationContext-security xml     lt security http auto-config  false  use-expressions  true  entry-point-ref  customAuthEntryPoint   gt       lt security form-login login-page   login jsp  default-target-url   index jsp                                                        authentication-failure-url   login jsp error true                             gt           lt security access-denied-handler error-page   errorPage jsp   gt        lt security logout logout-success-url   login jsp logout    gt           lt bean id  customAuthEntryPoint  class  com myapp utils CustomLoginUrlAuthenticationEntryPoint  scope  singleton  gt           lt constructor-arg value   login jsp    gt       lt  bean gt       lt bean id  requestCache  class  org springframework security web savedrequest HttpSessionRequestCache  gt       lt property name  requestMatcher  gt         lt bean class  org springframework security web util matcher NegatedRequestMatcher  gt           lt constructor-arg gt             lt bean class  org springframework security web util matcher MediaTypeRequestMatcher  gt               lt constructor-arg gt                 lt bean class  org springframework web accept HeaderContentNegotiationStrategy   gt               lt  constructor-arg gt               lt constructor-arg value    T org springframework http MediaType  APPLICATION JSON    gt               lt property name  useEquals  value  true   gt             lt  bean gt           lt  constructor-arg gt         lt  bean gt       lt  property gt   lt  bean gt    In my JSPs  add a global AJAX error handler as shown here       document   ajaxError function  event  jqxhr  settings  thrownError           if   jqxhr status     403               window location    login jsp           else             if thrownError    null                  alert thrownError               else                 alert  error                                Also  remove existing error handlers from AJAX calls in JSP pages           var str       viewForm   serialize              ajax               url   get mongoDB doc versions do               type   post               data  str              cache  false              async  false              dataType   json               success  function data                         error  function  jqXHR  textStatus  errorStr                       if textStatus    null                         alert textStatus                      else if errorStr    null                         alert errorStr                      else                        alert  error                                  I hope it helps others   Update1 I found that I needed to add the option  always-use-default-target  true   to the form-login config  This was needed since after an AJAX request gets redirected to the login page  due to expired session   Spring remembers the previous AJAX request and auto redirects to it after login  This causes the returned JSON to be displayed on the browser page  Of course  not what I want   Update2 Instead of using always-use-default-target  true   use  RobWinch example of blocking AJAX requests from the requstCache  This allows normal links to be redirected to their original target after login  but AJAX go to the home page after login

User · Answer

I know this topic is old  but I ll give yet another approach I ve found and previously described here  Basically I m using ASP MVC with WIF  but this is not really important for the context of this topic - answer is adequate no matter which frameworks are used  The clue stays unchanged - dealing with issues related to authentication failures while performing ajax requests     The approach shown below can be applied to all ajax requests out of the box  if they do not redefine beforeSend event obviously      ajaxSetup       beforeSend  checkPulse      error  function  XMLHttpRequest  textStatus  errorThrown            document open            document write XMLHttpRequest responseText           document close                Before any ajax request is performed CheckPulse method is invoked  the controller method which can be anything simplest     Authorize  public virtual void CheckPulse        If user is not authenticated  token has expired  such method cannot be accessed  protected by Authorize attribute   Because the framework handles authentication  while token expires  it puts http status 302 to the response  If you don t want your browser to handle 302 response transparently  catch it in Global asax and change response status - for example to 200 OK  Additionally  add header  which instructs you to process such response in special way  later at the client side    protected void Application EndRequest         if  Context Response StatusCode    302          amp  amp   new HttpContextWrapper Context   Request IsAjaxRequest                                  Context Response StatusCode   200          Context Response AddHeader  REQUIRES AUTH    1              Finally at the client side check for such custom header  If present - full redirection to logon page should be done  in my case window location is replaced by url from request which is handled automatically by my framework    function checkPulse XMLHttpRequest        var location   window location href        ajax           url    Controller CheckPulse           type   GET           async  false          beforeSend  null          success              function  result  textStatus  xhr                    if  xhr getResponseHeader  REQUIRES AUTH        1                         XMLHttpRequest abort       terminate further ajax execution                     window location   location

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in the servlet you should put  response setStatus response SC MOVED PERMANENTLY   to send the  301  xmlHttp status you need for a redirection     and in the   ajax function you should not use the  toString   function     just  if  xmlHttp status    301        top location href    xxxx jsp      the problem is it is not very flexible  you can t decide where you want to redirect    redirecting through the servlets should be the best way  but i still can not find the right way to do it

User · Answer

Additionally you will probably want to redirect user to the given in headers URL  So finally it will looks like this     ajax              other definition     complete function xmlHttp           if xmlHttp status toString   0    3            top location href   xmlHttp getResponseHeader  Location                UPD  Opps  Have the same task  but it not works  Doing this stuff  I ll show you solution when I ll find it

User · Answer

If you also want to pass the values then you can also set the session variables and access  Eg   In your jsp you can write    lt   HttpSession ses   request getSession true      String temp request getAttribute  what you defined      gt    And then you can store this temp value in your javascript variable and play around

User · Answer

Use statusCode option as in below case  redirects are usually 301  302 status codes for redirects    ajax       type   lt HTTP METHOD gt       url    server url       data   someData  true       statusCode            301  function responseObject  textStatus  errorThrown                  yor code goes here                    302  function responseObject  textStatus  errorThrown                  yor code goes here                                done function data       alert data       fail function jqXHR  textStatus       alert  Something went wrong      textStatus       always function jqXHR  textStatus       alert  Ajax request was finished

User · Answer

Use the low-level   ajax   call     ajax     url    yourservlet     data         complete  function xmlHttp           xmlHttp is a XMLHttpRquest object     alert xmlHttp status             Try this for a redirect   if  xmlHttp code    200      top location href     some other page

User · Answer

I solved this issue by    Adding a custom header to the response   public ActionResult Index        if   HttpContext User Identity IsAuthenticated                HttpContext Response AddHeader  REQUIRES AUTH   1              return View       Binding a JavaScript function to the ajaxSuccess event and checking to see if the header exists     document  ajaxSuccess function event  request  settings        if  request getResponseHeader  REQUIRES AUTH        1            window location

User · Answer

I was having this problem on a django app I m tinkering with  disclaimer  I m tinkering to learn  and am in no way an expert   What I wanted to do was use jQuery ajax to send a DELETE request to a resource  delete it on the server side  then send a redirect back to  basically  the homepage  When I sent HttpResponseRedirect   the-redirect    from the python script  jQuery s ajax method was receiving 200 instead of 302  So  what I did was to send a response of 300 with   response   HttpResponse status  300   response  Location       the-redirect    return  response   Then I sent handled the request on the client with jQuery ajax like so    lt button onclick   the-jquery   gt Delete lt  button gt   where  the-jquery      ajax      type   DELETE      url    resource-url       complete  function jqxhr        window location   jqxhr getResponseHeader  Location                Maybe using 300 isn t  right   but at least it worked just like I wanted it to   PS  this was a huge pain to edit on the mobile version of SO  Stupid ISP put my service cancellation request through right when I was done with my answer

User · Answer

Another solution I found  especially useful if you want to set a global behaviour  is to use the   ajaxsetup   method together with the statusCode property  Like others pointed out  don t use a redirect statuscode  3xx   instead use a 4xx statuscode and handle the redirect client-side     ajaxSetup      statusCode         400   function            window location                        Replace 400 with the statuscode you want to handle  Like already mentioned 401 Unauthorized could be a good idea  I use the 400 since it s very unspecific and I can use the 401 for more specific cases  like wrong login credentials   So instead of redirecting directly your backend should return a 4xx error-code when the session timed out and you you handle the redirect client-side  Works perfect for me even with frameworks like backbone js

User · Answer

The solution that was eventually implemented was to use a wrapper for the callback function of the Ajax call and in this wrapper check for the existence of a specific element on the returned HTML chunk  If the element was found then the wrapper executed a redirection  If not  the wrapper forwarded the call to the actual callback function    For example  our wrapper function was something like   function cbWrapper data  funct       if     myForm   data  length  gt  0          top location href  login htm    redirection     else         funct data       Then  when making the Ajax call we used something like     post  myAjaxHandler                     param1  foo          param2  bar                  function data              cbWrapper data  myActualCB                      html       This worked for us because all Ajax calls always returned HTML inside a DIV element that we use to replace a piece of the page  Also  we only needed to redirect to the login page

User · Answer

Try        document  ready function              if      site   length  gt  0                window location     lt    Url Content        gt      Login LogOn                       Put it on the login page  If it was loaded in a div on the main page  it will redirect til the login page    site  is a id of a div which is located on all pages except login page

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I read this question and implemented the approach that has been stated regarding setting the response HTTP status code to 278 in order to avoid the browser transparently handling the redirects  Even though this worked  I was a little dissatisfied as it is a bit of a hack   After more digging around  I ditched this approach and used JSON  In this case  all responses to AJAX requests have the status code 200 and the body of the response contains a JSON object that is constructed on the server  The JavaScript on the client can then use the JSON object to decide what it needs to do   I had a similar problem to yours  I perform an AJAX request that has 2 possible responses  one that redirects the browser to a new page and one that replaces an existing HTML form on the current page with a new one  The jQuery code to do this looks something like     ajax       type   POST       url  reqUrl      data  reqBody      dataType   json       success  function data  textStatus            if  data redirect                   data redirect contains the string URL to redirect to             window location href   data redirect            else                  data form contains the HTML for the replacement form                 myform   replaceWith data form                         The JSON object  data  is constructed on the server to have 2 members  data redirect and data form  I found this approach to be much better

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Try        document  ready function              if      site   length  gt  0                window location     lt    Url Content        gt      Login LogOn                       Put it on the login page  If it was loaded in a div on the main page  it will redirect til the login page    site  is a id of a div which is located on all pages except login page

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Use the low-level   ajax   call     ajax     url    yourservlet     data         complete  function xmlHttp           xmlHttp is a XMLHttpRquest object     alert xmlHttp status             Try this for a redirect   if  xmlHttp code    200      top location href     some other page

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Use statusCode option as in below case  redirects are usually 301  302 status codes for redirects    ajax       type   lt HTTP METHOD gt       url    server url       data   someData  true       statusCode            301  function responseObject  textStatus  errorThrown                  yor code goes here                    302  function responseObject  textStatus  errorThrown                  yor code goes here                                done function data       alert data       fail function jqXHR  textStatus       alert  Something went wrong      textStatus       always function jqXHR  textStatus       alert  Ajax request was finished

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Additionally you will probably want to redirect user to the given in headers URL  So finally it will looks like this     ajax              other definition     complete function xmlHttp           if xmlHttp status toString   0    3            top location href   xmlHttp getResponseHeader  Location                UPD  Opps  Have the same task  but it not works  Doing this stuff  I ll show you solution when I ll find it

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While the answers seem to work for people if you re using Spring Security I have found extending LoginUrlAuthenticationEntryPoint and adding specific code to handle AJAX more robust   Most of the examples intercept all redirects not just authentication failures   This was undesirable for the project I work on   You may find the need to also extend ExceptionTranslationFilter and override the  sendStartAuthentication  method to remove the caching step if you don t want the failed AJAX request cached   Example AjaxAwareAuthenticationEntryPoint   public class AjaxAwareAuthenticationEntryPoint extends     LoginUrlAuthenticationEntryPoint        public AjaxAwareAuthenticationEntryPoint String loginUrl            super loginUrl               Override     public void commence HttpServletRequest request  HttpServletResponse response  AuthenticationException authException  throws IOException  ServletException           if  isAjax request                 response sendError HttpStatus UNAUTHORIZED value     Please re-authenticate yourself              else           super commence request  response  authException                        public static boolean isAjax HttpServletRequest request            return request    null  amp  amp   XMLHttpRequest  equals request getHeader  X-Requested-With               Sources  1  2

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I think a better way to handle this is to leverage the existing HTTP protocol response codes  specifically 401 Unauthorized   Here is how I solved it    Server side  If session expires  and request is ajax  send a 401 response code header Client side  Bind to the ajax events     body   bind  ajaxSuccess  function event request settings   if  401    request status       window location     users login        bind  ajaxError  function event request settings   if  401    request status       window location     users login            IMO this is more generic and you are not writing some new custom spec header   You also should not have to modify any of your existing ajax calls   Edit  Per  Rob s comment below  401  the HTTP status code for authentication errors  should be the indicator  See 403 Forbidden vs 401 Unauthorized HTTP responses for more detail  With that being said some web frameworks use 403 for both authentication AND authorization errors - so adapt accordingly  Thanks Rob

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The solution that was eventually implemented was to use a wrapper for the callback function of the Ajax call and in this wrapper check for the existence of a specific element on the returned HTML chunk  If the element was found then the wrapper executed a redirection  If not  the wrapper forwarded the call to the actual callback function    For example  our wrapper function was something like   function cbWrapper data  funct       if     myForm   data  length  gt  0          top location href  login htm    redirection     else         funct data       Then  when making the Ajax call we used something like     post  myAjaxHandler                     param1  foo          param2  bar                  function data              cbWrapper data  myActualCB                      html       This worked for us because all Ajax calls always returned HTML inside a DIV element that we use to replace a piece of the page  Also  we only needed to redirect to the login page

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Most of the given solutions use a workaround  using an extra header or an inappropiate HTTP code  Those solutions will most probably work but feel a bit  hacky   I ve come up with another solution   We re using WIF which is configured to redirect  passiveRedirectEnabled  true   on a 401 response  The redirect is usefull when handling normal requests but won t work for AJAX requests  since browsers won t execute the 302 redirect     Using the following code in your global asax you can disable the redirect for AJAX requests       void WSFederationAuthenticationModule AuthorizationFailed object sender  AuthorizationFailedEventArgs e                string requestedWithHeader   HttpContext Current Request Headers  X-Requested-With             if   string IsNullOrEmpty requestedWithHeader   amp  amp  requestedWithHeader Equals  XMLHttpRequest   StringComparison OrdinalIgnoreCase                         e RedirectToIdentityProvider   false                    This allows you to return 401 responses for AJAX requests  which your javascript can then handle by reloading the page  Reloading the page  will throw a 401 which will be handled by WIF  and WIF will redirect the user to the login page    An example javascript to handle 401 errors     document  ajaxError function  event  jqxhr  settings  exception         if  jqxhr status    401      Forbidden  go to login           Use a reload  WIF will redirect to Login         location reload true

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I didn t have any success with the header solution - they were never picked up in my ajaxSuccess   ajaxComplete method  I used Steg s answer with the custom response  but I modified the JS side some  I setup a method that I call in each function so I can use standard   get and   post methods   function handleAjaxResponse data  callback          Try to convert and parse object     try           if  jQuery type data       string                 data   jQuery parseJSON data                     if  data error                if  data error     login                     window location reload                    return                            else if  data error length  gt  0                    alert data error                   return                                    catch ex           if  callback            callback data             Example of it in use     function submitAjaxForm form  url  action          Lock form     form find   ajax-submit   hide        form find   loader   show           post url  form serialize    function  d              Unlock form         form find   ajax-submit   show            form find   loader   hide             handleAjaxResponse d  function  data                       more code for if auth passes                             return false

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I resolved this issue like this   Add a middleware to process response  if it is a redirect for an ajax request  change the response to a normal response with the redirect url   class AjaxRedirect object     def process response self  request  response       if request is ajax          if type response     HttpResponseRedirect          r   HttpResponse json dumps   redirect   response  Location              return r     return response   Then in ajaxComplete  if the response contains redirect  it must be a redirect  so change the browser s location      body   ajaxComplete function  e  xhr  settings       if  xhr status    200           var redirect   null         try              redirect     parseJSON xhr responseText  redirect             if  redirect                   window location href   redirect replace            next     window location pathname                         catch  e               return

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The solution that was eventually implemented was to use a wrapper for the callback function of the Ajax call and in this wrapper check for the existence of a specific element on the returned HTML chunk  If the element was found then the wrapper executed a redirection  If not  the wrapper forwarded the call to the actual callback function    For example  our wrapper function was something like   function cbWrapper data  funct       if     myForm   data  length  gt  0          top location href  login htm    redirection     else         funct data       Then  when making the Ajax call we used something like     post  myAjaxHandler                     param1  foo          param2  bar                  function data              cbWrapper data  myActualCB                      html       This worked for us because all Ajax calls always returned HTML inside a DIV element that we use to replace a piece of the page  Also  we only needed to redirect to the login page

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this worked for me    success  function data  textStatus  xhr             console log xhr status       on success  ajax will get the same status code the browser gets from the server and execute it

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Additionally you will probably want to redirect user to the given in headers URL  So finally it will looks like this     ajax              other definition     complete function xmlHttp           if xmlHttp status toString   0    3            top location href   xmlHttp getResponseHeader  Location                UPD  Opps  Have the same task  but it not works  Doing this stuff  I ll show you solution when I ll find it

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I solved this issue by    Adding a custom header to the response   public ActionResult Index        if   HttpContext User Identity IsAuthenticated                HttpContext Response AddHeader  REQUIRES AUTH   1              return View       Binding a JavaScript function to the ajaxSuccess event and checking to see if the header exists     document  ajaxSuccess function event  request  settings        if  request getResponseHeader  REQUIRES AUTH        1            window location

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Most of the given solutions use a workaround  using an extra header or an inappropiate HTTP code  Those solutions will most probably work but feel a bit  hacky   I ve come up with another solution   We re using WIF which is configured to redirect  passiveRedirectEnabled  true   on a 401 response  The redirect is usefull when handling normal requests but won t work for AJAX requests  since browsers won t execute the 302 redirect     Using the following code in your global asax you can disable the redirect for AJAX requests       void WSFederationAuthenticationModule AuthorizationFailed object sender  AuthorizationFailedEventArgs e                string requestedWithHeader   HttpContext Current Request Headers  X-Requested-With             if   string IsNullOrEmpty requestedWithHeader   amp  amp  requestedWithHeader Equals  XMLHttpRequest   StringComparison OrdinalIgnoreCase                         e RedirectToIdentityProvider   false                    This allows you to return 401 responses for AJAX requests  which your javascript can then handle by reloading the page  Reloading the page  will throw a 401 which will be handled by WIF  and WIF will redirect the user to the login page    An example javascript to handle 401 errors     document  ajaxError function  event  jqxhr  settings  exception         if  jqxhr status    401      Forbidden  go to login           Use a reload  WIF will redirect to Login         location reload true

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Putting together what Vladimir Prudnikov and Thomas Hansen said    Change your server-side code to detect if it s an XHR  If it is  set the response code of the redirect to 278  In django        if request is ajax          response status code   278    This makes the browser treat the response as a success  and hand it to your Javascript    In your JS  make sure the form submission is via Ajax  check the response code and redirect if needed         my-form   submit function event       event preventDefault         var options         url    this  attr  action        type   POST       complete  function response  textStatus              if  response status    278             window location   response getResponseHeader  Location                 else       your code here                   data    this  serialize                   ajax options

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I know this topic is old  but I ll give yet another approach I ve found and previously described here  Basically I m using ASP MVC with WIF  but this is not really important for the context of this topic - answer is adequate no matter which frameworks are used  The clue stays unchanged - dealing with issues related to authentication failures while performing ajax requests     The approach shown below can be applied to all ajax requests out of the box  if they do not redefine beforeSend event obviously      ajaxSetup       beforeSend  checkPulse      error  function  XMLHttpRequest  textStatus  errorThrown            document open            document write XMLHttpRequest responseText           document close                Before any ajax request is performed CheckPulse method is invoked  the controller method which can be anything simplest     Authorize  public virtual void CheckPulse        If user is not authenticated  token has expired  such method cannot be accessed  protected by Authorize attribute   Because the framework handles authentication  while token expires  it puts http status 302 to the response  If you don t want your browser to handle 302 response transparently  catch it in Global asax and change response status - for example to 200 OK  Additionally  add header  which instructs you to process such response in special way  later at the client side    protected void Application EndRequest         if  Context Response StatusCode    302          amp  amp   new HttpContextWrapper Context   Request IsAjaxRequest                                  Context Response StatusCode   200          Context Response AddHeader  REQUIRES AUTH    1              Finally at the client side check for such custom header  If present - full redirection to logon page should be done  in my case window location is replaced by url from request which is handled automatically by my framework    function checkPulse XMLHttpRequest        var location   window location href        ajax           url    Controller CheckPulse           type   GET           async  false          beforeSend  null          success              function  result  textStatus  xhr                    if  xhr getResponseHeader  REQUIRES AUTH        1                         XMLHttpRequest abort       terminate further ajax execution                     window location   location

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I think a better way to handle this is to leverage the existing HTTP protocol response codes  specifically 401 Unauthorized   Here is how I solved it    Server side  If session expires  and request is ajax  send a 401 response code header Client side  Bind to the ajax events     body   bind  ajaxSuccess  function event request settings   if  401    request status       window location     users login        bind  ajaxError  function event request settings   if  401    request status       window location     users login            IMO this is more generic and you are not writing some new custom spec header   You also should not have to modify any of your existing ajax calls   Edit  Per  Rob s comment below  401  the HTTP status code for authentication errors  should be the indicator  See 403 Forbidden vs 401 Unauthorized HTTP responses for more detail  With that being said some web frameworks use 403 for both authentication AND authorization errors - so adapt accordingly  Thanks Rob

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Finally  I solve the problem by adding a custom HTTP Header  Just before response for every request in server side  i add the current requested url to response s header   My application type on server is Asp Net MVC  and it has a good place to do it  in Global asax i implemented the Application EndRequest event so       public class MvcApplication   System Web HttpApplication                                         protected void Application EndRequest object sender  EventArgs e                        var app    HttpApplication sender              app Context Response Headers Add  CurrentUrl  app Context  Request CurrentExecutionFilePath                      It works perfect for me  Now in every response of the JQuery   post i have the requested url and also other response headers which comes as result of POST method by status 302  303         and other important thing is that there is no need to modify code on server side nor client side   and the next is the ability to get access to the other information of post action such errors  messages  and      In this way   I posted this  maybe help someone

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I just wanted to share my approach as this might it might help someone   I basically included a JavaScript module which handles the authentication stuff like displaying the username and also this case handling the redirect to the login page   My scenario  We basically have an ISA server in between which listens to all requests and responds with a 302 and a location header to our login page   In my JavaScript module my initial approach was something like    document  ajaxComplete function e  xhr  settings       if xhr status     302             check for location header and redirect                The problem  as many here already mentioned  is that the browser handles the redirect by itself wherefore my ajaxComplete callback got never called  but instead I got the response of the already redirected Login page which obviously was a status 200  The problem  how do you detect whether the successful 200 response is your actual login page or just some other arbitrary page    The solution  Since I was not able to capture 302 redirect responses  I added a LoginPage header on my login page which contained the url of the login page itself  In the module I now listen for the header and do a redirect   if xhr status     200       var loginPageRedirectHeader   xhr getResponseHeader  LoginPage        if loginPageRedirectHeader  amp  amp  loginPageRedirectHeader                  window location replace loginPageRedirectHeader                and that works like charm     You might wonder why I include the url in the LoginPage header   well basically because I found no way of determining the url of GET resulting from the automatic location redirect from the xhr object

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I have a simple solution that works for me  no server code change needed   just add a tsp of nutmeg       document  ready function            document  ajaxSend      function event request settings                var intercepted success   settings success          settings success   function  a  b  c                            if  request responseText indexOf    lt html gt      gt  -1                   window location   window location              else                 intercepted success  a  b  c                             I check the presence of html tag  but you can change the indexOf to search for whatever unique string exists in your login page

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in the servlet you should put  response setStatus response SC MOVED PERMANENTLY   to send the  301  xmlHttp status you need for a redirection     and in the   ajax function you should not use the  toString   function     just  if  xmlHttp status    301        top location href    xxxx jsp      the problem is it is not very flexible  you can t decide where you want to redirect    redirecting through the servlets should be the best way  but i still can not find the right way to do it

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I solved this by putting the following in my login php page    lt script type  text javascript  gt      if  top location href indexOf  login php      -1            top location href     login php          lt  script gt

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I didn t have any success with the header solution - they were never picked up in my ajaxSuccess   ajaxComplete method  I used Steg s answer with the custom response  but I modified the JS side some  I setup a method that I call in each function so I can use standard   get and   post methods   function handleAjaxResponse data  callback          Try to convert and parse object     try           if  jQuery type data       string                 data   jQuery parseJSON data                     if  data error                if  data error     login                     window location reload                    return                            else if  data error length  gt  0                    alert data error                   return                                    catch ex           if  callback            callback data             Example of it in use     function submitAjaxForm form  url  action          Lock form     form find   ajax-submit   hide        form find   loader   show           post url  form serialize    function  d              Unlock form         form find   ajax-submit   show            form find   loader   hide             handleAjaxResponse d  function  data                       more code for if auth passes                             return false

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This problem may appear then using ASP NET MVC RedirectToAction method  To prevent form displaying the response in div you can simply do some kind of ajax response filter for incomming responses with   ajaxSetup  If the response contains MVC redirection you can evaluate this expression on JS side  Example code for JS below     ajaxSetup       dataFilter  function  data  type            if  data  amp  amp  typeof data     string                 if  data indexOf  window location    gt  -1                    eval data                                   return data              If data is   window location     Acount Login   above filter will catch that and evaluate to make the redirection instead of letting the data to be displayed

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Some might find the below useful   I wanted clients to be redirected to the login page for any rest-action that is sent without an authorization token  Since all of my rest-actions are Ajax based  I needed a good generic way to redirect to the login page instead of handling the Ajax success function   This is what I ve done   On any Ajax request my server will return a Json 200 response  NEED TO AUTHENTICATE   if the client needs to authenticate    Simple example in Java  server side     Secured  Provider  Priority Priorities AUTHENTICATION  public class AuthenticationFilter implements ContainerRequestFilter        private final Logger m logger   LoggerFactory getLogger AuthenticationFilter class        public static final String COOKIE NAME    token cookie          Override     public void filter ContainerRequestContext context  throws IOException                      Check if it has a cookie          try               Map lt String  Cookie gt  cookies   context getCookies                 if   cookies containsKey COOKIE NAME                     m logger debug  No cookie set - redirect to login page                    throw new AuthenticationException                                    catch  AuthenticationException e                context abortWith Response ok    NEED TO AUTHENTICATE     type  json application   build                         In my Javascript I ve added the following code     ajaxPrefilter function options  originalOptions  jqXHR        var originalSuccess   options success       options success   function data            if  data     NEED TO AUTHENTICATE                 window location replace   login html                      else               originalSuccess data                                And that s about it

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No browsers handle 301 and 302 responses correctly  And in fact the standard even says they should handle them  transparently  which is a MASSIVE headache for Ajax Library vendors  In Ra-Ajax we were forced into using HTTP response status code 278  just some  unused  success code  to handle transparently redirects from the server     This really annoys me  and if someone here have some  pull  in W3C I would appreciate that you could let W3C know that we really need to handle 301 and 302 codes ourselves

User · Answer

I have a simple solution that works for me  no server code change needed   just add a tsp of nutmeg       document  ready function            document  ajaxSend      function event request settings                var intercepted success   settings success          settings success   function  a  b  c                            if  request responseText indexOf    lt html gt      gt  -1                   window location   window location              else                 intercepted success  a  b  c                             I check the presence of html tag  but you can change the indexOf to search for whatever unique string exists in your login page

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I just wanted to latch on to any ajax requests for the entire page   SuperG got me started  Here is what I ended up with      redirect ajax requests that are redirected  not found  404   or forbidden  403      body   bind  ajaxComplete   function event request settings           switch request status                case 301  case 404  case 403                                      window location replace  http   mysite tld login                    break                  I wanted to specifically check for certain http status codes to base my decision on  However  you can just bind to ajaxError to get anything other than success  200 only perhaps   I could have just written      body   bind  ajaxError   function event request settings       window location replace  http   mysite tld login

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I like Timmerz s method with a slight twist of lemon  If you ever get returned contentType of text html when you re expecting JSON  you are most likely being redirected  In my case  I just simply reload the page  and it gets redirected to the login page  Oh  and check that the jqXHR status is 200  which seems silly  because you are in the error function  right  Otherwise  legitimate error cases will force an iterative reload  oops     ajax     error   function  jqXHR  timeout  message        var contentType   jqXHR getResponseHeader  Content-Type        if  jqXHR status     200  amp  amp  contentType toLowerCase   indexOf  text html    gt   0               assume that our login has expired - reload our current page         window location reload

User · Answer

No browsers handle 301 and 302 responses correctly  And in fact the standard even says they should handle them  transparently  which is a MASSIVE headache for Ajax Library vendors  In Ra-Ajax we were forced into using HTTP response status code 278  just some  unused  success code  to handle transparently redirects from the server     This really annoys me  and if someone here have some  pull  in W3C I would appreciate that you could let W3C know that we really need to handle 301 and 302 codes ourselves

User · Answer

in the servlet you should put  response setStatus response SC MOVED PERMANENTLY   to send the  301  xmlHttp status you need for a redirection     and in the   ajax function you should not use the  toString   function     just  if  xmlHttp status    301        top location href    xxxx jsp      the problem is it is not very flexible  you can t decide where you want to redirect    redirecting through the servlets should be the best way  but i still can not find the right way to do it

User · Answer

Let me just quote again the problem as described by  Steg     I had a similar problem to yours  I perform an ajax request that has 2   possible responses  one that redirects the browser to a new page and   one that replaces an existing HTML form on the current page with a new   one    IMHO this is a real challenge and will have to be officially extended to the current HTTP standards   I believe the new Http Standard will be to use a new status-code  meaning  currently 301 302 tells the browser to go and fetch the content of this request to a new location   In the extended standard  it will say that if the response status  308  just an example   then the browser should redirect the main page to the location provided   That being said  I m inclined to already mimic this future behavior  and therefore when a document redirect is needed  I have the server respond as   status  204 No Content x-status  308 Document Redirect x-location   login html   When JS gets the  status  204   it checks for the existence of the x-status  308 header  and does a document redirect to the page provided in the location header   Does this make any sense to you

[javascript] How to manage a redirect request after a jQuery Ajax call

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