使用Ajax请求以html数据类型加载网页-错误

Question

I am trying to get the register numbers of the people who scored 'S' in a certain subject from a website from the localhost.

But i am getting this error

XMLHttpRequest cannot load http://sas.sastra.edu/result2013/index.php . Origin http://localhost is not allowed by Access-Control-Allow-Origin

  for(i=115003001;i<115003230;i++)
{
    $.post("http://sas.sastra.edu/result2013/index.php",{regno:i},function(data,textstatus,obj){
        if($(data).find('tbody tr:nth-child(2) td:nth-child(2)').text().slice(60,62)=="S")
        {
            console.warn(i);
        }
    },{dataType:"HTML"});
}

Please Comment if i am not clear.

Answer 1

Simply said http://sas.sastra.edu does not allow you to make a cross domain httprequest .

Ajax requests are limited by the browser's Same Origin Policy. This means that you can't talk directly to a server via ajax that isn't on the same domain as the page your script is running in. So, unless you're developing a page for google.com, you can't talk to google.com directly httprequest.

Making Either make sure they though or try doing a JSONP call is probably what you need to do here if the API you're attempting to use supports it.

Read more about jsonp here: What is JSONP all about?