Close kill the session when the browser or tab is closed

Question

Can somebody tell me how can I close kill the session when the user closes the browser  I am using stateserver mode for my asp net web app  The onbeforeunload method is not proper as it fires when user refreshes the page

User · Answer

It is not possible to kill the session variable  when the machine unexpectly shutdown due to power failure  It is only possible when the user is idle for a long time or it is properly logout

User · Answer

You can t  HTTP is a stateless protocol  so you can t tell when a user has closed their browser or they are simply sitting there with an open browser window doing nothing   That s why sessions have a timeout - you can try and reduce the timeout in order to close inactive sessions faster  but this may cause legitimate users to have their session timeout early

User · Answer

As said  the browser doesn t let the server know when it closes   Still  there are some ways to achieve close to this behavior  You can put a small AJAX script in place that updates the server regularly that the browser is open  You should pair this with something that fires on actions made by the user  so you can time out an idle session as well as one that has closed out

User · Answer

Not perfect but best solution for now    var spcKey   false  var hover   true  var contextMenu   false   function spc e        return   e altKey    e ctrlKey    e keyCode    91    e keyCode  87   amp  amp  e keyCode  82  amp  amp  e keyCode  116        document  hover function          hover   true      contextMenu   false      spcKey   false     function          hover   false     keydown function  e        if  spc e     false            hover   true          spcKey   false            else           spcKey   true           keyup function  e        if  spc e             spcKey   false           contextmenu function  e        contextMenu   true     click function          hover   true      contextMenu   false       window addEventListener  focus   function          spcKey   false      window addEventListener  blur   function          hover   false       window onbeforeunload   function  e        if   hover    false    spcKey    true   amp  amp  contextMenu  false            window setTimeout goToLoginPage  100             ajax               url    Account Logoff               type   post               data      logoutForm   serialize                        return  Oturumunuz kapatildi              return      function goToLoginPage         hover   true      spcKey   false      contextMenu   false      location href     Account Login

User · Answer

Please refer the below steps    First create a page SessionClear aspx and write the code to clear session Then add following JavaScript code in your page or Master Page    lt script language  javascript  type  text javascript  gt      var isClose   false         this code will handle the F5 or Ctrl F5 key       need to handle more cases like ctrl R whose codes are not listed here     document onkeydown   checkKeycode     function checkKeycode e        var keycode      if  window event      keycode   window event keyCode      else if  e      keycode   e which      if keycode    116            isClose   true                  function somefunction             isClose   true                lt   CDATA           function bodyUnload            if  isClose                        var request   GetRequest                  request open  GET    SessionClear aspx   true                 request send                              function GetRequest                 var request   null              if  window XMLHttpRequest                      incase of IE7 FF  Opera and Safari browser                 request   new XMLHttpRequest                              else                     for old browser like IE 6 x and IE 5 x                 request   new ActiveXObject  MSXML2 XMLHTTP 3 0                              return request                      gt   lt  script gt   Add the following code in the body tag of master page    lt body onbeforeunload  bodyUnload     onmousedown  somefunction    gt

User · Answer

I do it like this     window  bind  unload   function          if event clientY  lt  0              alert  Thank you for using this app             endSession       here you can do what you want                     window onbeforeunload   function            window  unbind  unload          If a string is returned  you automatically ask the        user if he wants to logout or not          return        beforeunload event        if  event clientY  lt  0            alert  Thank you for using this service             endSession

User · Answer

For browser close you can put below code into your web config     lt system web gt       lt sessionState mode  InProc  gt  lt  sessionState gt    lt  system web gt    It will destroy your session when browser is closed  but it will not work for tab close

User · Answer

Use this    window onbeforeunload   function          if   validNavigation            endSession              jsfiddle  Prevent F5  form submit  input click and Close kill the session when the browser or tab is closed  tested in ie8  and modern browsers  Enjoy

User · Answer

As you said the event window onbeforeunload fires when the users clicks on a link or refreshes the page  so it would not a good even to end a session   http   msdn microsoft com en-us library ms536907 VS 85  aspx describes all situations where window onbeforeonload is triggered   IE   However  you can place a JavaScript global variable on your pages to identify actions that should not trigger a logoff  by using an AJAX call from onbeforeonload  for example    The script below relies on JQuery       autoLogoff js     Every valid navigation  form submit  click on links  should   set this variable to true      If it is left to false the page will try to invalidate the   session via an AJAX call    var validNavigation   false        Invokes the servlet  endSession to invalidate the session    No HTML output is returned    function endSession          get   lt whatever url will end your session gt        function wireUpEvents               For a list of events that triggers onbeforeunload on IE     check http   msdn microsoft com en-us library ms536907 VS 85  aspx        window onbeforeunload   function           if   validNavigation             endSession                      Attach the event click for all links in the page      a   bind  click   function          validNavigation   true              Attach the event submit for all forms in the page      form   bind  submit   function          validNavigation   true               Wire up the events as soon as the DOM tree is ready   document  ready function         wireUpEvents            This script may be included in all pages   lt script type  text javascript  src  js autoLogoff js  gt  lt  script gt      Let s go through this code     var validNavigation   false     window onbeforeunload   function           if   validNavigation             endSession                      Attach the event click for all links in the page      a   bind  click   function          validNavigation   true              Attach the event submit for all forms in the page      form   bind  submit   function          validNavigation   true          A global variable is defined at page level  If this variable is not set to true then the event windows onbeforeonload will terminate the session    An event handler is attached to every link and form in the page to set this variable to true  thus preventing the session from being terminated if the user is just submitting a form or clicking on a link   function endSession          get   lt whatever url will end your session gt         The session is terminated if the user closed the browser tab or navigated away  In this case the global variable was not set to true and the script will do an AJAX call to whichever URL you want to end the session  This solution is server-side technology agnostic  It was not exaustively tested but it seems to work fine in my tests

[asp.net] Close/kill the session when the browser or tab is closed

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