Stop jQuery load response from being cached

Question

I have the following code making a GET request on a URL       searchButton   click function             inquiry   load   portal  f searchBilling amp pid         query   val                       But the returned result is not always reflected  For example  I made a change in the response that spit out a stack trace but the stack trace did not appear when I clicked on the search button  I looked at the underlying PHP code that controls the ajax response and it had the correct code and visiting the page directly showed the correct result but the output returned by  load was old   If I close the browser and reopen it it works once and then starts to return the stale information  Can I control this by jQuery or do I need to have my PHP script output headers to control caching

User · Answer

Another approach to put the below line only when require to get data from server Append the below line along with your ajax url         Math round Math random   10000

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I noticed that if some servers  like Apache2  are not configured to specifically allow or deny any  caching   then the server may by default send a  cached  response  even if you set the HTTP headers to  no-cache   So make sure that your server is not  caching  anything before it sents a response   In the case of Apache2 you have to  1  edit the  disk cache conf  file - to disable cache add  CacheDisable  local files  directive  2  load mod cache modules  On Ubuntu  sudo a2enmod cache  and  sudo a2enmod disk cache    3  restart the Apache2  Ubuntu  sudo service apache2 restart     This should do the trick disabling cache on the servers side  Cheers

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This code may help you  var sr       Search Result    sr load  AJAX-Search aspx q         q    val       amp rnd     String  new Date  getTime     replace   D gi

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This is of particular annoyance in IE  Basically you have to send  no-cache  HTTP headers back with your response from the server

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One way is to add a unique number to the end of the url       inquiry   load   portal  f searchBilling amp pid         query   val     amp uid   uniqueId       Where you write uniqueId   to return something different each time it s called

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If you want to stick with Jquery s  load   method  add something unique to the URL like a JavaScript timestamp    new Date   getTime     Notice I had to add an   amp time   so it does not alter your pid variable       searchButton   click function         inquiry   load   portal  f searchBilling amp pid         query   val     amp time   new Date   getTime

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You can replace the jquery load function with a version that has cache set to false             function        var  load   jQuery fn load      fn load   function url  params  callback      if   typeof url      string   amp  amp   load             return  load apply  this  arguments            var selector  type  response        self   this        off   url indexOf            if  off  gt  -1          selector   stripAndCollapse url slice off          url   url slice 0  off                 If it s a function     if  jQuery isFunction params               We assume that it s the callback       callback   params        params   undefined            Otherwise  build a param string       else if  params  amp  amp  typeof params      object           type    POST                 If we have elements to modify  make the request     if  self length  gt  0          jQuery ajax           url  url              If  type  variable is undefined  then  GET  method will be used             Make value of this field explicit since            user can override it through ajaxSetup method         type  type     GET           dataType   html           cache  false          data  params          done function responseText                Save response for use in complete callback         response   arguments           self html selector                 If a selector was specified  locate the right elements in a dummy div              Exclude scripts to avoid IE  Permission Denied  errors           jQuery   lt div gt    append jQuery parseHTML responseText   find selector                  Otherwise use the full result           responseText               If the request succeeds  this function gets  data    status    jqXHR             but they are ignored because response was set above             If it fails  this function gets  jqXHR    status    error           always callback  amp  amp  function jqXHR  status            self each function               callback apply this  response     jqXHR responseText  status  jqXHR                                     return this         jQuery     Place this somewhere global where it will run after jquery loads and you should be all set   Your existing load code will no longer be cached

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Use this function as jQuery  load  to disable request caching in IE    Example     selector   loadWithoutCache  url   function      success function callback               fn loadWithoutCache   function      var elem     this    var func   arguments 1      ajax        url  arguments 0        cache  false       dataType   html        success  function data  textStatus  XMLHttpRequest       elem html data      if func    undefined       func data  textStatus  XMLHttpRequest                     return elem

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Try this       Search Result   load  AJAX-Search aspx q         q   val       amp rnd     String  new Date    getTime    replace   D gi          It works fine when i used it

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Do NOT use timestamp to make an unique URL as for every page you visit is cached in DOM by jquery mobile and you soon run into trouble of running out of memory on mobiles    jqm document  bind  pagebeforeload   function event  data        var url   data url      var savePageInDOM   true       if  url toLowerCase   indexOf  vacancies    gt   0            savePageInDOM   false              jqm mobile cache    savePageInDOM       This code activates before page is loaded  you can use url indexOf   to determine if the URL is the one you want to cache or not and set the cache parameter accordingly   Do not use window location       to change URL otherwise you will navigate to the address and pagebeforeload will not fire  In order to get around this problem simply use window location hash

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Here is an example of how to control caching on a per-request basis    ajax       url    YourController       cache  false      dataType   html       success  function data                content   html data

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You have to use a more complex function like   ajax   if you want to control caching on a per-request basis  Or  if you just want to turn it off for everything  put this at the top of your script     ajaxSetup           Disable caching of AJAX responses     cache  false

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Sasha is good idea   i use a mix   I create a function   LoadWithoutCache  function  url  source          ajax           url  url          cache  false          dataType   html           success  function  data                        source  html data               return false                        And invoke for diferents parts of my page for example on init   Init  function  actionUrl1  actionUrl2  actionUrl3     var ExampleJS     Init  function  actionUrl1  actionUrl2  actionUrl3            ExampleJS LoadWithoutCache actionUrl1   div1      ExampleJS LoadWithoutCache actionUrl2   div2    ExampleJS LoadWithoutCache actionUrl3   div3

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For PHP  add this line to your script which serves the information you want   header  cache-control  no-cache      or  add a unique variable to the query string     portal  f searchBilling amp x      new Date    getTime

[jquery] Stop jQuery .load response from being cached

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