在https之间发送ajax请求

Question

我使用angular将ajax请求发送到nodejs文件，我发现此错误，

XMLHttpRequest cannot load https://localhost:3000/SetUser. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://localhost' is therefore not allowed access. 

将其从index.html发送到https://localhost:3000/SetUser，并指出可能出错的方法以及如何允许Access-Control-Allow-Origin访问？

- 编辑： 我用谷歌搜索，我发现了这一行

res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With");

但我仍然得到同样的错误，这是当前的app.post

app.post('/SetUser', function(req, res) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    console.log("New user added ", req.body);
});

谢谢！