Question

When updating the content of a text file, it does not update. Instead, I have to delete all cache and whatnot in my Google Chrome to make it refresh it. However, it does work when using a Apache server (local host).

I tried adding a: <meta http-equiv="expires" content="Mon, 26 Jul 1997 05:00:00 GMT"/> <meta http-equiv="pragma" content="no-cache" />, but the problem still occurs.

function MakeRequest()
{
  var xmlHttp = getXMLHttp(); // just a basic XML request
  xmlHttp.onreadystatechange = function()
  {
    if(xmlHttp.readyState == 4)
    {
      HandleResponse(xmlHttp.responseText);
    }
  }
  xmlHttp.open("GET", "counter.txt", true); 
  xmlHttp.send(null);
}

And I have another JavaScript just printing this in a div: (timed to run with some delay)

document.getElementById('counterHolder').innerHTML = response;

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Answer 1

This appears to be a caching problem. I can’t exactly describe why it happens the way it does, but in my experience, adding a random string of characters to the end of your url in your get request should work. I would suggest something like below:

xmlHttp.open("GET", "counter.txt?" + Math.random(), true);