func handleMessageQueue(w http.ResponseWriter,r *http.Request) {
    w.Header().Set("Access-Control-Allow-Origin","*")
    if r.Method == "POST" {

        c := appengine.NewContext(r)

        body,_ := IoUtil.ReadAll(r.Body)

        auth := string(body[:])
        r.Body.Close()
        q := datastore.NewQuery("Message").Order("-Date")

        var msg []Message
        key,err := q.GetAll(c,&msg)

        if err != nil {
            c.Errorf("fetching msg: %v",err)
            return
        }

        w.Header().Set("Content-Type","application/json")
        jsonMsg,err := json.Marshal(msg)
        msgstr := string(jsonMsg)
        fmt.Fprint(w,msgstr)
        return
    }
}

在我的firefox OS应用程序中，我使用：

var message = "content";

request = new XMLHttpRequest();
request.open('POST','http://localhost:8080/msgs',true);

request.onload = function () {
    if (request.status >= 200 && request.status < 400) {
        // Success!
        data = JSON.parse(request.responseText);
        console.log(data);
    } else {
        // We reached our target server,but it returned an error
        console.log("server error");
    }
};

request.onerror = function () {
    // There was a connection error of some sort
    console.log("connection error");
};

request.send(message);

传入的部分都沿着这样的方向工作。但是，我的回复正在被阻止。给我以下消息：

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:8080/msgs. This can be fixed by moving the resource to the same domain or enabling CORS.

我尝试了很多其他的事情，但是我无法从服务器得到响应。但是，当我将Go POST方法更改为GET并通过浏览器访问该页面时，我会收到我想要的数据。我不能确定哪一方出错，为什么可能是Go不应该阻止这些请求，但也可能是我的javascript是非法的。