发布到节点服务器时允许跨域

Question

我正在尝试使用Restify将字符串发布到Node服务器。我的帖子＆＃39;请求看起来像这样：

// AJAX image save
function saveImage() {
    var xmlhttp = new XMLHttpRequest();
    var url     = 'http://127.0.0.1:7070/server.js';
    var params  = document.querySelector('img').src;

    console.log(params);

    xmlhttp.open("POST", url, true);

    //Send the proper header infomation along with the request
    xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
        {
            var response = xmlhttp.responseText;

            // Callback
            if(response == 'false')
            {
                return(false);
            }
            else
            {
                return(true);
            }
        }
    }
    xmlhttp.send(params); 
}

然后在服务器上，我有以下设置：

// Setup server.
var restify = require('restify'),
    imageSave = require('save')('image');
var server = restify.createServer({ name: 'imageCapture'});
    server.use(restify.acceptParser(server.acceptable));

server.listen(7070, '127.0.0.1', function() {
  console.log('%s listening at %s', server.name, server.url);
});

server
  .use(restify.fullResponse())
  .use(restify.bodyParser())

// Saving bit...
server.post('/images', function (req, res, next) {

    console.log(req, res);

    res.setHeader('Access-Control-Allow-Origin','*');

    imageSave.create({ image: req.params.name }, function (error, image) {

        res.send(201, image)
    })
})

我是否在服务器端Javascript中设置了标头？那是接受发布请求吗？