jQuery ajax-xhr.responseText始终未定义

Question

我正在尝试调试对API的jQuery调用，但是xhr.responseText似乎总是未定义。 我需要对此代码进行哪些更改才能查看错误的详细信息？

jQuery.ajax({
    url: 'http://fusion-api-user.dev/api/v1/user/authorise/' + currentVideoItem.id + '/play',
    async: async,
    beforeSend: function(xhr){
        xhr.setRequestHeader('X-Forwarded-Host', 'fusion.dev');
    },
    xhrFields: {
        withCredentials: true
    },
    success: function (res, status, xhr) {
        currentVideoItem.authModule.playWithToken(xhr.getResponseHeader("X-Token"), "ais");
        alert('xhr: ' + xhr);
        alert('token:' + xhr.getResponseHeader('X-Token'));

        jQuery(currentVideoItem.parentContainer).trigger('video-authorized', [{
            id: currentVideoItem.id
        }]);
    },
    error: function(xhr, status) {
        alert("readyState: " + xhr.readyState + "\nstatus: " + xhr.status);
        alert("responseText: " + xhr.responseText);
        jQuery(window).trigger('countdown-session-ended', [{
            name: 'video', 
            trigger: 'authorizePlayError'
        }]);
    }
});

Answer 1

我通过添加一个回调函数并在成功函数中对其进行调用来解决这一问题，如下所示：

success: function (response) {
//
    callback(response);
//
},