Ajax Engines

Get Contents from a URL

The basic code to use method GET to obtain the contents at a URL (or to ping the URL):

<script type="text/javascript">
function RequestMethodGET(URL)
{
   var http = new XMLHttpRequest();
   if(! http) { return false; }
   http.onreadystatechange = function()
   {
      // When no response handling is desired, the next block may be removed in its entirety.
      if(http.readyState == 4)
      {
         if(http.status == 200)
         {
            // Any actions to take when the server at the URL responds (response is in the http.responseText variable).
         }
         else { alert("Error: "+http.status+" "+http.statusText); }
      }
   }
   http.open("GET",URL,true);
   http.send('');
}
</script>

Post Contents to a URL

The basic code to use method POST for sending information to a URL and optionally retrieving its contents:

<script type="text/javascript">
function RequestMethodPOST()
{
   var http = new XMLHttpRequest();
   if(! http) { return false; }
   var URL = "http://example.com/CHANGE-ME.php";
   var params = new Array(); // UPDATE THESE
   params.push( encodeURIComponent("a name") + "=" + encodeURIComponent("the name's value") );
   params.push( encodeURIComponent("another name") + "=" + encodeURIComponent("another value") );
   http.onreadystatechange = function()
   {
      // When no response handling is desired, the next block may be removed in its entirety.
      if(http.readyState == 4)
      {
         if(http.status == 200)
         {
            // Any actions to take when the server at the URL responds (response is in the http.responseText variable).
         }
         else { alert("Error: "+http.status+" "+http.statusText); }
      }
   }
   http.open("POST",URL,true);
   http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
   http.send(params.join("&"));
}
</script>