Question

我仍然是Firebase世界的初学者，我一直试图弄清楚下面的代码是什么问题，但我在所有方面都失败了。

代码应该从数据库中的用户配置文件中检索uid，然后使用它来更新身份验证配置文件，如果身份验证配置文件更新成功，则再次更新数据库配置文件。

在index.js中，我已经定义了一个导出函数来处理来自HTML表单的POSTed参数。下面的代码定义了另一个模块文件中的处理函数：

 exports.auUpdateUserByEmail = (req, res) => {
  // This handler function will retrieve the POSTed params of user profile
  // and will attempt to update the existing user authentication as well as
  // the database profiles.
  //
  // This function accepts the following params:
  // 1. User email   // 2. Phone number   // 3. password   // 4. Display name
  // 5. Photo url   // 6. Disabled Flag
  //

  var db = admin.firestore();

  var uEmail = req.body.userEmail;
  var dName = req.body.displayName;
  var userId = "";

  var newuser = {
    displayName: dName
  }

  console.log("Email passed: " + uEmail);

  // Fetch the user UID by user email...
  res.write('User UID: ' + userId);
  console.log('User UID: ' + userId);

  // attempt to update the user authentication profile...
  return db.collection('Users').where('email', '==', email).get()
  .then(snapshot => {
    snapshot.forEach(doc => {
        var d = doc.data();
        console.log("doc.id: " + doc.id + " - d.email: " + d.email);
        if(d.email == email)
        {
          userId = d.uid;
        }
    });

    return admin.auth().updateUser(userId, newuser);
  }).then(function(userRecord) {
    // The updating was successful... Attempt to update User Details in
    // database User Profile...
    console.log("User Updated Successfully. UID: " + userRecord.uid);
    retUid = userRecord.uid;

    // Create a reference to the Users Database...
    var docRef = db.collection('Users');

    // Update the user profile document.
    return docRef.doc(userRecord.uid).update(newuser);
  }).then(result => {
    // everything went fine... return User UID as a successful result...
    res.write(userId);

    return res.end();

  }).catch(function(error) {
    console.log("doc.update - Error updating user profile in database:", error);
    return res.end();

  });
}

在index.js中，我有以下导出定义：

var appAuth = express();
//Here we are configuring express to use body-parser as middle-ware.
appAuth.use(bodyParser.urlencoded({ extended: false }));
appAuth.use(bodyParser.json());

appAuth.post('/updateUserByEmail', authusers.auUpdateUserByEmail);

exports.usersAuthFunctions = functions.https.onRequest(appAuth);

我必须说我能够正常工作以获取uid，更新auth配置文件，然后更新数据库配置文件，但它会一直等待函数返回。

感谢您的宝贵帮助。感谢。

我已更新了以下代码并执行了这些工作但返回了一个空白页面，因为HTTPS在Promise完成之前退出并触发＆＃34;错误：写完后＃34; 错误。

var fetch_uid = db.collection('Users').where('email', '==', uEmail).get()
  .then(snapshot => {
    // var userId = snapshot.data.uid;

    snapshot.forEach(doc => {
        var d = doc.data();
        console.log("doc.id: " + doc.id + " - d.email: " + d.email);
        if(d.email == uEmail)
        {
          userId = d.uid;

          res.write('User UID: ' + userId);
          console.log('User UID: ' + userId);

        }
    });

    return admin.auth().updateUser(userId, newuser);
  }).then(function(userRecord) {
    // The updating was successful... Attempt to update User Details in
    // database User Profile...
    console.log("User Updated Successfully. UID: " + userRecord.uid);
    retUid = userRecord.uid;

    // Create a reference to the Users Database...
    var docRef = db.collection('Users');

    // Update the user profile document.
    return docRef.doc(userRecord.uid).update(newuser);
  }).then(result => {
    // everything went fine... return User UID as a successful result...
    res.write(userId);

    return;

  }).catch(function(error) {
    console.log("doc.update - Error updating user profile in database:", error);
    return;

  });

  res.end();

Answer 1

我在Cloud Functions for Firebase HTTP timeout的上一个答案可能对此有所帮助：

HTTP请求触发的云功能需要终止以send()，redirect()或end()结束，否则为他们将继续运行并达到超时。

从您的代码示例中，您的then(){}承诺返回看起来以res.end()结尾，但整个函数从Promise返回：

return db.collection('Users').where('email', '==', email).get()

当你想要它时，可以阻止它结束。使用HTTPS触发器，您无需返回Promise以保持函数运行，只需返回结果。

尝试从此行中删除return语句：

db.collection('Users').where('email', '==', email).get()

然后您只需确保所有退出路线（或终止点）以res.end()或类似方式结束，因此目前您有2个终止点：

  }).then(result => {
    // everything went fine... return User UID as a successful result...
    res.write(userId);

    res.status(200).end();
  }).catch(function(error) {
    console.log("doc.update - Error updating user profile in database:", error);

    res.status(500).end();
  });

Firebase函数返回并且promise不会退出函数

1 个答案: