节点中的 CORS 问题.js失败

Question

app.use(function (req, res, next) {
    // Website you wish to allow to connect
    res.setHeader('Access-Control-Allow-Origin', 'http://localhost:8100');
    // Request headers you wish to allow
    res.setHeader('Access-Control-Allow-Headers', '*');
    // Set to true if you need the website to include cookies in the requests sent
    // to the API (e.g. in case you use sessions)
    res.setHeader('Access-Control-Allow-Credentials', true);
    // Pass to next layer of middleware
    next();
});

我使用邮递员一切正常，但是在测试以 http://localhost:8100 运行的离子应用程序时遇到了CORS问题。我用谷歌搜索并设法找到上面的设置标题解决方案，但现在我收到此错误：

Request header field owner is not allowed by Access-Control-Allow-Headers in preflight response.

有什么想法吗？

Answer 1

尝试使用 cors 中间件。

var cors = require('cors');
app.use(cors());