如果我在我的 firebase 云函数中将请求的模式设置为 'no-cors' 会发生什么？

Question

这是 this 问题的跟进。我有一个 firebase 函数，它应该采用 OTP，对其进行验证，然后根据它是否正确更改用户密码（出于某种原因，我无法使用 firebase 的内置密码重置功能）。以下是我的功能：

exports.resetPassword = functions.https.onCall((data, context) => {
    return new Promise((resolve, reject) => {
        if(data.sesId && data.otp){
            admin.firestore().collection('verification').doc(data.sesId).get().then(verSnp => {
                if(verSnp.data().attempt != 'verified'){
                    var now = new Date().getTime()
                    if(verSnp.data().expiring > now){
                        if(data.email == verSnp.data().email){
                            if(verSnp.data().attempt > 0){
                                if(data.otp == verSnp.data().otp){
                                    admin.auth().getUserByEmail(data.email).then(user => {
                                        admin.auth().updateUser(user.uid,{
                                            password: data.password
                                        }).then(() => {
                                            admin.firestore().collection('verification').doc(data.sesId).update({
                                                attempt: 'verified'
                                            }).then(() => {
                                                Promise.resolve()
                                            }).catch(() => {
                                                throw new Error('Error updating the database.')
                                            })
                                        }).catch(() => {
                                            throw new Error('Error updating the password. Please try again.')
                                        })
                                    }).catch(() => {
                                        throw new Error('Incorrect email. How did you get here?')
                                    })
                                } else {
                                    var redAttempt = verSnp.data().attempt - 1
                                    admin.firestore().collection('verification').doc(data.sesId).update({
                                        attempt: redAttempt
                                    }).then(() => {
                                        throw new Error(`Incorrect OTP. You have ${redAttempt} attempts remaining.`)
                                    }).catch(() => {
                                        throw new Error('Wrong OTP, try again.')
                                    })
                                }
                            } else {
                                throw new Error('Incorrect OTP. You have exhausted your attempts. Please request a new OTP.')
                            }
                        } else {
                            throw new Error('Incorrect email. How did you get here?')
                        }
                    } else {
                        throw new Error('OTP is expired. Please request a new OTP.')
                    }
                } else {
                    throw new Error('OTP is invalid. Please request a new OTP.')
                }
            }).catch(() => {
                throw new Error('Invalid session id. Please request the OTP through Forgot Password.')
            })
        } else {
            throw new Error('Enter OTP')
        }
    })
})

当我运行函数时，它会被执行，因为我可以在控制台语句中看到它，但我在客户端出现以下错误。

Access to fetch at 'https://us-central1-project-name.cloudfunctions.net/functionName' from origin 'http://localhost:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

当我记录从函数收到的响应时，它显示 {"code":"internal"}。

什么是 cors 包？我该如何解决这个问题？

第 2 部分（不相关）

此外，在我的函数的第 11 和 12 行，我使用

admin.auth().getUserByEmail(data.email).then(user => {
  admin.auth().updateUser(user.uid, {password: data.password})
})

这是正确的吗？

对于第 1 部分，我提到了 this 问题，但没有答案。

Answer 1

查看可调用云函数的 documentation：

你不需要将它封装在return new Promise((resolve, reject) => {});
您需要到return可以JSON编码的数据；
您需要通过抛出（或return拒绝承诺）functions.https.HttpsError的实例来正确管理错误；
您需要正确链接异步方法return所有的承诺。

我在下面尝试根据上述几点重新组织您的代码，但由于您的业务逻辑很复杂，我无法对其进行测试，并且可能有其他方法来管理所有情况...向上给你"polish"这第一次尝试！希望对您有所帮助。

exports.resetPassword = functions.https.onCall((data, context) => {

        if(data.sesId && data.otp){

            let dataOptCorresponds = true;

            return admin.firestore().collection('verification').doc(data.sesId).get()
            .then(verSnp => {
                if(verSnp.data().attempt != 'verified'){

                    var now = new Date().getTime()

                    if(verSnp.data().expiring > now){
                        if(data.email == verSnp.data().email){
                            if(verSnp.data().attempt > 0){
                                if(data.otp == verSnp.data().otp){
                                    return admin.auth().getUserByEmail(data.email);
                                } else {
                                    dataOptCorresponds = false;
                                    var redAttempt = verSnp.data().attempt - 1
                                    return admin.firestore().collection('verification').doc(data.sesId).update({
                                        attempt: redAttempt
                                    })
                                }
                            } else {
                                throw new Error('Incorrect OTP. You have exhausted your attempts. Please request a new OTP.')
                            }
                        } else {
                            throw new Error('Incorrect email. How did you get here?')
                        }
                    } else {
                        throw new Error('OTP is expired. Please request a new OTP.')
                    }
                } else {
                    throw new Error('OTP is invalid. Please request a new OTP.')
                }
            })
            .then(user => {
                if(dataOptCorresponds) {
                    return admin.auth().updateUser(user.uid,{
                        password: data.password
                    })
                } else {
                    throw new Error(`Incorrect OTP. You have xxxx attempts remaining.`)
                }
            })
            .then(() => {
                return admin.firestore().collection('verification').doc(data.sesId).update({
                    attempt: 'verified'
                })
            .then(() => {
                return {result: "success"}                      
            })          
            .catch(error => {
                throw new functions.https.HttpsError('internal', error.message);

            })

        } else {

            throw new functions.https.HttpsError('invalid-argument', 'Enter OTP');
        }

})

更新以下 Bergi 的评论：

如果您希望能够区分 return 发送到前端的错误类型（特别是如果 OTP 不正确，则发回 invalid-argument HttpsError，无效或过期或电子邮件不正确）您可以在 then() 方法中使用第二个参数。

exports.resetPassword = functions.https.onCall((data, context) => {

        if(data.sesId && data.otp){

            let dataOptCorresponds = true;

            return admin.firestore().collection('verification').doc(data.sesId).get()
            .then(

                verSnp => {
                    if(verSnp.data().attempt != 'verified'){

                        var now = new Date().getTime()

                        if(verSnp.data().expiring > now){
                            if(data.email == verSnp.data().email){
                                if(verSnp.data().attempt > 0){
                                    if(data.otp == verSnp.data().otp){
                                        return admin.auth().getUserByEmail(data.email);
                                    } else {
                                        dataOptCorresponds = false;
                                        var redAttempt = verSnp.data().attempt - 1
                                        return admin.firestore().collection('verification').doc(data.sesId).update({
                                            attempt: redAttempt
                                        })
                                    }
                                } else {
                                    throw new Error('Incorrect OTP. You have exhausted your attempts. Please request a new OTP.')
                                }
                            } else {
                                throw new Error('Incorrect email. How did you get here?')
                            }
                        } else {
                            throw new Error('OTP is expired. Please request a new OTP.')
                        }
                    } else {
                        throw new Error('OTP is invalid. Please request a new OTP.')
                    }
                },

                error => {

                    throw new functions.https.HttpsError('invalid-argument', error.message);

                }

            )
            .then(user => {
                if(dataOptCorresponds) {
                    return admin.auth().updateUser(user.uid,{
                        password: data.password
                    })
                } else {
                    throw new Error(`Incorrect OTP. You have xxxx attempts remaining.`)
                }
            })
            .then(() => {
                return admin.firestore().collection('verification').doc(data.sesId).update({
                    attempt: 'verified'
                })
            .then(() => {
                return {result: "success"}                      
            })          
            .catch(error => {
                throw new functions.https.HttpsError('internal', error.message);

            })

        } else {

            throw new functions.https.HttpsError('invalid-argument', 'Enter OTP');
        }

})

如果我在我的 firebase 云函数中将请求的模式设置为 'no-cors' 会发生什么？

What will happen if I set the request's mode to 'no-cors' in my firebase cloud function?

javascript

cors

firebase

es6-promise

google-cloud-functions