通过ajax设置和检索外部cookie

Question

I am sending an Ajax request to a PHP script where I am using setcookie to set the cookies on an external domain. After that, I am sending another Ajax request to the external domain to read the cookies. I am unable to achieve the results. I am using jQuery to send Ajax requests.

The PHP script:

<?php
// yummy cookies ?

header("Access-Control-Allow-Origin: " . $_SERVER['HTTP_ORIGIN']);
header("Access-Control-Allow-Credentials: true");

if($_GET['read'] == true) {
    echo json_encode(
        array(
            'user_id' => $_COOKIE['user_id'],
            'twitter_name' => $_COOKIE['twitter_name'],
            'facebook_id' => $_COOKIE['facebook_id']
        )
    );
}

if($_GET['write'] == true) {
    if($_GET['type'] == 'twitter') {
        setcookie('twitter_name', $_GET['twitter_name'], time() + 1209600);
        setcookie('user_id', $_GET['user_id'], time() + 1209600);
    }

    if($_GET['type'] == 'facebook') {
        setcookie('facebook_id', $_GET['facebook_id'], time() + 1209600);
        setcookie('user_id', $_GET['user_id'], time() + 1209600);
    }
}

Answer 1

You might be running into the problem where ajax doesn't allow cross site calls (can't call to another domain).

Most people use an iframe instead of ajax, put the src to the other site's cookie script.

The iframe would look like <iframe src="otherdomain.com/cookiecode.php?var1=something" style="visibility:hidden;display:none"></iframe>