javascript - 将短期访问 token 交换为长期有效

我正在尝试将一个短暂的用户访问令牌交换为一个有效期，但是却出现错误（在all.js中）：

ReferenceError：左侧的赋值无效

... TZCOZCkuZBxZAzVUSokiOJbXZAHhESJvuA97qXTpVbVj3P7AZDZD＆expires = 512326

response.error.message：未知错误

码：

window.fbAsyncInit = function () {
           FB.init({
               appId: 'xxx', // App ID
               status: true, // check login status
               cookie: true, // enable cookies to allow the server to access the session
               xfbml: true,  // parse XFBML
               oauth: true
           });

           FB.login(function (response) {
                    if (response) {

                    var accessToken = response.authResponse.accessToken;

                    FB.getLoginStatus(function(response) {
                        if (response.status === 'connected') {

                            var accessToken = response.authResponse.accessToken;

                            var OauthParams = {};
                            OauthParams['client_id'] = 'xxx';
                            OauthParams['client_secret'] = 'xxx';
                            OauthParams['grant_type'] = 'fb_exchange_token';
                            OauthParams['fb_exchange_token'] = accessToken;
                            OauthParams['response_type'] = 'token';
                            console.log(accessToken);

                            FB.api('/oauth/access_token', 'post', OauthParams, function(response) {
                                if (!response || response.error) {
                                    console.log(response.error.message);
                                }
                                else {
                                    console.log(response.accesstoken);
                                }
                            });
                        }
                    });
                    };

           }, { scope: 'manage_pages' });

       };


}

(function(d){
     var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
     if (d.getElementById(id)) {return;}
     js = d.createElement('script'); js.id = id; js.async = true;
     js.src = "//connect.facebook.net/en_US/all.js";
     ref.parentNode.insertBefore(js, ref);
}(document));

有人有主意吗？

谢谢，
/米

最佳答案

根据documentation的方案4，您必须向

https://graph.facebook.com/oauth/access_token?
    client_id=APP_ID&
    client_secret=APP_SECRET&
    grant_type=fb_exchange_token&
    fb_exchange_token=EXISTING_ACCESS_TOKEN

也许问题是您使用的是GET请求，但是我不确定

附言我不建议在客户端使用APP_SECRET