Firebase云功能的安全HTTP触发器

Question

有没有办法在触发云功能之前检查用户是否经过Firebase授权？（或在函数内）

Answer 1

是的。您需要将Firebase ID令牌与请求一起发送（例如，在AJAX请求的authorization头中），然后使用Firebase Admin SDK验证它。Firebase示例存储库的云功能中有一个深入的示例。它看起来是这样的（为了SO post而变得更短）：

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const cors = require('cors')();

const validateFirebaseIdToken = (req, res, next) => {
  cors(req, res, () => {
    const idToken = req.headers.authorization.split('Bearer ')[1];
    admin.auth().verifyIdToken(idToken).then(decodedIdToken => {
      console.log('ID Token correctly decoded', decodedIdToken);
      req.user = decodedIdToken;
      next();
    }).catch(error => {
      console.error('Error while verifying Firebase ID token:', error);
      res.status(403).send('Unauthorized');
    });
  });
};

exports.myFn = functions.https.onRequest((req, res) => {
  validateFirebaseIdToken(req, res, () => {
    // now you know they're authorized and `req.user` has info about them
  });
});