自定义函数成功响应 / node.js

Question

我将这个 node.js 代码作为 IBM Cloud 函数获取，让我的 Watson Assistant 用户通过电子邮件向我发送提醒。效果很好。

var nodemailer = require('nodemailer');

let smtpConfig = {
    host: 'hosthere', // you can also use smtp.gmail.com
    port: porthere,
    secure: false, // use TLS
    auth: {
        user: 'emailhere', 
        pass: 'passwordhere'
    }
};

function main(params) {
    return new Promise(function (resolve, reject) {
        let response = {
            code: 200,
            msg: 'E-mail was sent successfully!'
        };

        if (!params.reminder) {
            response.msg = "Error: Reminder was not provided.";
            response.code = 400;
        }
        else if (!params.email) {
            response.msg = "Error: Destination e-mail was not provided.";
            response.code = 400;
        }
        else if (!params.conversation_id) {
            response.msg = "Error: Conversation id was not provided.";
            response.code = 400;
        }
        if (response.code != 200) {
            reject(response);
        }

        console.log(`Validation was successful, preparing to send email...`);

        sendEmail(params, function (email_response) {
            response.msg = email_response['msg'];
            response.code = email_response['code'];
            response.reason = email_response['reason'];
            console.log(`Email delivery response: (${email_response['code']}) ${response.msg}`);
            resolve(response);
        });

    });
}

function sendEmail(params, callback) {

    let transporter = nodemailer.createTransport(smtpConfig);
    let mailOptions = {
        from: `Watson Assistent Message <${smtpConfig.auth.user}>`,
        to: params.email,
        subject: `REMINDER: ${params.reminder}`,
        text: `Do it!`
    };
    transporter.sendMail(mailOptions, function (error, info) {

        let email_response = {
            code: 200,
            msg: 'Email was sent successfully',
            reason: 'Success'
        };

        if (error) {
            email_response.msg = 'Error';
            email_response.code = 500;
            email_response.reason = error;
        }
        else {
            email_response.msg = info.response;
            email_response.code = 200;
            email_response.reason = info.response;
        }
        callback(email_response);
    });
}

我只需要在请求成功后自定义“结果”中显示的响应。所以我可以打印给用户类似“电子邮件发送成功”（如果它真的成功的话）

当调用该函数时，它给了我这个：

Results:
{
  "code": 200,
  "msg": "250 Requested mail action okay, completed: id=1N0Fxf-1lzPHJ457n-00xO6a",
  "reason": "250 Requested mail action okay, completed: id=1N0Fxf-1lzPHJ457n-00xO6a"
}
Logs:
[
  "2021-01-20T23:11:38.706021Z    stdout: Validation was successful, preparing to send email...",
  "2021-01-20T23:11:39.117946Z    stdout: Email delivery response: (200) 250 Requested mail action okay, completed: id=1N0Fxf-1lzPHJ457n-00xO6a"
]

问题是，打印到“msg”的整个答案在代码中没有定义。实际上，代码中有一个成功请求的定义答案，只是没有打印出来。

这是为什么呢？我怎么能改变它？

有了错误响应，一切正常。代码中定义的答案会打印在“结果”中：

Results:
{
  "error": {
    "code": 400,
    "msg": "Error: Destination e-mail was not provided."
  }
}
Logs:
[
  "2021-01-21T09:47:14.531598Z    stdout: Validation was successful, preparing to send email..."
]

成功消息有什么问题？

Answer 1

当你定义时：

msg: 'Email was sent successfully', in email_response

它只是被if/else 覆盖。

如果您希望 电子邮件已成功发送 消息（或者如果不正常），请执行以下操作：

callback(error ? {
  code: 500,
  msg: 'Error',
  reason: error
} : {
  code: 200,
  msg: 'Success',
  reason: info.response.includes('okey') ? 'Email was sent successfully' : info.response 
})

Answer 2

你可以这样做来得到一个概括的信息，

function sendEmail(params, callback) {

    let transporter = nodemailer.createTransport(smtpConfig);
    let mailOptions = {
        from: `Watson Assistent Message <${smtpConfig.auth.user}>`,
        to: params.email,
        subject: `REMINDER: ${params.reminder}`,
        text: `Do it!`
    };
    transporter.sendMail(mailOptions, function (error, info) {

        // Sets the response object, changing it to a generalized message.
        let email_response = 'Email was sent successfully';

        if (error) {
            email_response = 'Email was not sent successfully';
        }

        callback(email_response);
    });
}

像这样调用sendEmail，

sendEmail(params, function (email_response) {
            response = email_response;
            resolve(response);
        });