Question

我在Express.js上连接到外部API（GraphQL）时遇到问题。你能给我一些关于此的好教程吗？

还有一个问题。我有这个错误：

可以连接此API吗？

Answer 1

尝试将以下中间件添加到您的NodeJS / Express应用程序中（为方便起见，我添加了一些注释）：

// Add headers
app.use(function (req, res, next) {

    // Website you wish to allow to connect
    res.setHeader('Access-Control-Allow-Origin', 'http://localhost:8888');

    // Request methods you wish to allow
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');

    // Request headers you wish to allow
    res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');

    // 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();
});

希望有所帮助！

Express.js - 使用GraphQL外部API连接

1 个答案: