自定义Host无效

[tenlee2012]

crossRequest({
        url: 'http://httpbin.org/post',
        method: 'POST',
        headers: {
            'Content-Type': 'application/json',
            'Host': 'baidu.com'
        },
        data: {
            a: 1,
            b: 2,
            c: {
                t: 1
            }
        },
        success: function (res) {
            console.log(arguments)
        }
    })

实际结果Host = httpbin.org