index.js

$(document).ready(function(){

	getMessages();
	
	setInterval('getMessages()', 500);
	
});


function getMessages() {
	
	$.ajax({
		type: 'GET',
		url: urlbase + 'data/finished/' + call_id,
		dataType: 'json',
		success: function(data, textStatus, XMLHttpRequest) {
			console.log(data);
			console.log('success');
		},
		complete: function(textStatus, XMLHttpRequest) {
			console.log(textStatus);
			console.log('complete');
		},
		error: function(XMLHttpRequest, textStatus, errorThrown) {
			console.log(textStatus);
			console.log('error');
		}
	});
	
	
	var content =  '';
	$.ajax({
		dataType: 'json',
		url: urlbase + 'assist/get/' + call_id,
		success: function(data, textStatus, XMLHttpRequest) {
			// esse funciona...
		}
	});
}