receiving ajax call in JOOMLA?

Question

i am tying two different statements to get POST result of ajax in JOOMLA

first JOOMLA native statement is not working fine. i also tried get() getVar(). . . not working. it returns null

  $vJson=$app->input->getCmd("chk");

but second one is OK and showing results

  $vJson = file_get_contents('php://input');

following is client side code

         xmlhttpp.open("POST","index.php?option=com_hello&controller=SetComObjects",true);
                xmlhttpp.setRequestHeader("Content-Type", "application/json");
                xmlhttpp.onreadystatechange=function()
                {
                if (xmlhttpp.readyState==4 && xmlhttpp.status==200)
                  {
                  alert("haha");
                  }
                }
                 xmlhttpp.send(chk);  

my controller code

 public function execute()
 {

  $app=JFactory::getApplication();


  //following line return null in str_json
  $str_json=$app->input->getCmd("chk");

  //$model->_buildQuery();

  //but following statement is  giving OK result
  $str_json = file_get_contents('php://input');


  $str_json=json_decode($str_json);

Answer 1

Try this,

          var data = "chk="+chk;
          jQuery.ajax ({
            type: "POST",
            url: "index.php?option=com_hello&controller=SetComObjects?",
            data: data,
                    dataType: "json", 
            success: function(data) {


            var obj = jQuery.parseJSON(data);
                    alert( obj.name);//if its have a name
            }
         });

Your are not passing the chk to the controller as a parameter then how its gets there ?

Hope its helps..

Answer 2

I think that getCmd method is what causes the problem. You can read about more JInput::get() here.

I'd suggest you to use:

$app->input->getArray($_POST);