云函数获取当前用户

Question

我的问题如下:我有一个系统，其中包含一些资产信息(例如，一本书)，并且该资产具有一些特征(例如，标题、当前所有者、颜色)。我希望能够通过执行一个HTTP请求来更改当前所有者，如简介中所示：https://firebase.google.com/docs/functions/get-started

乍一看似乎很简单，但是我无法获得当前的用户ID或浏览器会话电子邮件。我之前尝试过使用实时数据库触发器来寻找解决方案：https://firebase.google.com/docs/functions/database-events

我当前的代码如下：

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

// // Create and Deploy Your First Cloud Functions
// // https://firebase.google.com/docs/functions/write-firebase-functions
//
// exports.helloWorld = functions.https.onRequest((request, response) => {
//  response.send("Hello from Firebase!");
// });

// The Firebase Admin SDK to access the Firebase Realtime Database.
const admin = require('firebase-admin');
admin.initializeApp();
//const user = admin.auth.user();

function dir(object) {
    stuff = [];
    for (s in object) {
        stuff.push(s);
    }
    stuff.sort();
    return stuff;
}

// Take the text parameter passed to this HTTP endpoint and insert it into the
// Realtime Database under the path /messages/:pushId/original
exports.addMessage = functions.https.onRequest(async (req, res) => {
  // Grab the text parameter.
  const original = req.query.text;
  // Push the new message into the Realtime Database using the Firebase Admin SDK.
  const snapshot = await admin.database().ref('/messages').push({original: original});
  //const snapshot2 = await admin.database().ref('/messages').push({original: email});
  // Redirect with 303 SEE OTHER to the URL of the pushed object in the Firebase console.
  res.redirect(303, snapshot.ref.toString());
});

exports.impersonateMakeUpperCase = functions.database.ref('/messages/{pushId}/original')
    .onCreate((snap, context) => {
      const appOptions = JSON.parse(process.env.FIREBASE_CONFIG);
      appOptions.databaseAuthVariableOverride = context.auth;
      console.log(dir(context))
      const app = admin.initializeApp(appOptions, 'app');
      const uppercase = snap.val().toUpperCase();
      const ref = snap.ref.parent.child('uppercase');

      const deleteApp = () => app.delete().catch(() => null);

      return app.database().ref(ref).set(uppercase).then(res => {
        // Deleting the app is necessary for preventing concurrency leaks
        return deleteApp().then(() => res);
      }).catch(err => {
        return deleteApp().then(() => Promise.reject(err));
      });
    });

exports.simpleDbFunction = functions.database.ref('/messages/{pushId}/original')
    .onCreate((snap, context) => {
      if (context.authType === 'ADMIN') {
        // do something
        console.log(snap.val(), 'written by', context);
      } else if (context.authType === 'USER') {
        console.log(snap.val(), 'written by USER', context);
      }

每次我尝试从context.auth.uid或context.auth.token.email获取时，它都返回null，似乎context.auth是null。也许有一些步骤我是跳过的。

我只想获取当前用户或浏览器会话用户，并更新我在请求中为新所有者发送的图书id。我希望界面尽可能简单，就像扫描条形码或一键点击。

Answer 1

如果context.auth的值为null，这意味着在数据库更改的同时没有用户登录到客户端应用程序。

https://firebase.google.com/docs/functions/database-events#accessing_user_authentication_information

Answer 2

对于感兴趣的应用程序，如果您已经有一个angular应用程序，则可以通过查询路由中的参数来实现此行为，请检查以下内容：https://alligator.io/angular/query-parameters/