将异步函数中的firebase云函数错误发送给用户

Question

我正在尝试使用firebase云函数作为webapp应用程序的后端。我尝试创建一个函数来创建一个用户，如下所示：

exports.createUser = functions.https.onCall(async (data, context) => {
    //validate email
    if (!verifyEmail(data.email))
        throw new functions.https.HttpsError("invalid-argument", `The email ${data.email} is not formatted correctly`)

    if (data.password !== data.confirmPassword)
        throw new functions.https.HttpsError("invalid-argument", `Passwords do not match`)

    if (!data.username)
        throw new functions.https.HttpsError("invalid-argument", `Username cannot be empty`)

    admin.auth().createUser({
        email: data.email,
        password: data.password
    }).then(user => {
        admin.firestore().collection('users').doc(user.uid).set({
            username: data.username
        }).catch(error => {
            throw new functions.https.HttpsError("internal", `An internal error occured creating the user`, error)
        })
    }).catch(error => {
        throw new functions.https.HttpsError("internal", `An internal error occured creating the user`, error)
    })
})

当传入格式不正确的电子邮件时，会将错误传递给用户，但是，如果在创建用户时发生故障，则会在后端日志中打印出错误，而不会发送给用户。有没有办法解决这个问题？

Answer 1

您将async/await与.then()混合在一起，通常不推荐这样做，因为它会导致这种混淆。尝试如下所示：

exports.createUser = functions.https.onCall(async (data, context) => {
    //validate email
    if (!verifyEmail(data.email))
        throw new functions.https.HttpsError("invalid-argument", `The email ${data.email} is not formatted correctly`)

    if (data.password !== data.confirmPassword)
        throw new functions.https.HttpsError("invalid-argument", `Passwords do not match`)

    if (!data.username)
        throw new functions.https.HttpsError("invalid-argument", `Username cannot be empty`)

    try {
      const user = await admin.auth().createUser({
        email: data.email,
        password: data.password
      });
      await admin.firestore().collection('users').doc(user.uid).set({
        username: data.username
      });
    } catch (err) {
      functions.logger.error("Unexpected error creating user", err);
      throw new functions.https.HttpsError("internal", `An internal error occured creating the user`);
    }
})