Question

我正在尝试将两个函数（send-mail和sendsms）的返回值收集到一个变量（var ordermessage）中。它很好地从send-sms中获取了返回值。

我正在使用mailgun api发送邮件，而ordermessage只是接收到“ undefined”。但是发送邮件一直在运行。

我尝试了`await mailgun.messages（）。send（...）`
我已经尝试过`const myvar = await mailgun.messages（）。send（...）`
还有`let myvar = await mailgun.messages（）。send ...`

娜达。

我尝试使用具有api调用的函数作为回调。仍然不确定。电子邮件和短信都可以发送，但是我需要电子邮件服务器的回复。我正在使用Mailgun试用版，因此我需要返回响应。

send-mail.js

var mailgun = require('mailgun-js')({apiKey: process.env.MAILGUN_API_KEY, domain: process.env.MAILGUN_DOMAIN});
  var processresponse = "\n";

  var data = {
    from: 'Zigy Demo Store <admin_demo@zigy.com>',
    to: email,
    subject: 'You have placed an order.',
    text: body
  };

  console.log("\n----------START EMAIL-------------\n");

mailgun.messages()
  .send(data, function (error, body) {
    console.log("\nFinally running MAILGUN. Return body is\n", body);
    if (body == undefined || body == false) { 
      console.log("Got nothing from server.");
    } else {
      processresponse += body.message;
      console.log("***********************Gotten reply from Mailgun server.*******************************\n", processresponse);
    }
  });

OrderController函数

module.exports = {
    neworder: async function(req, res) {
        var sendemail = require('./send-mail');
        var sendtext = require('./send-sms');

        var orderdetails = 'New order created at '+ new Date() + '\nItem  ---> Price'; //Message that will be sent to users.
        var item;
        var printcart = await Shoppingcart.findOne({
            where: {
                id: req.body.cart,
                owner: req.body.user
            }
        }).populate('product');
        var ordermessage = '';

        for (items in printcart.product) {
            item = printcart.product[items];
            orderdetails += '\n' + item.name + ' ---> ' + item.price;
        }
        console.log(orderdetails);
        //to get email addr and phone number
        phone = req.body.phone; 
        var email = req.body.email;

        var user = await User.findOne({id:printcart.owner});

        ordermessage += await sendemail(email, orderdetails); 
        console.log("\nAfter email, the message is ", ordermessage);

        ordermessage += await sendtext(phone, orderdetails);
        console.log("\nAfter text, Printing order message to be returned to browser ", ordermessage);

        console.log("Final message ", ordermessage);

        res.send(ordermessage);
    }
};

终端

----------START EMAIL-------------

Calling test function

After email, the message is  


Finally running MAILGUN. Return body is
 { id:
   '<20190222062410.1.FD7A4868FA0ADF5E@sandbox612cf746219c46ad93d5dc588f9341ff.mailgun.org>',
  message: 'Queued. Thank you.' }
***********************Gotten reply from Mailgun server.*******************************

Queued. Thank you.
Checking list of verified numbers...
Found the phonenumber!
You will receive an SMS message with your order details soon.

After text, Printing order message to be returned to browser  
You will receive an SMS message with your order details soon.
Final message  
You will receive an SMS message with your order details soon.
SM9bc04208f9354834a153fb1ffd7dc8bb

任何帮助将不胜感激。

编辑：我从send-mail.js和send-sms.js内部调用res.write，并且摆脱了变量ordermessage。

Answer 1

这是一个猜测：我认为mailgun.messages().send(...)方法不会返回任何内容，因为它使用的是经典回调。因此，您将始终从中获得undefined。

但是您可以从回调中的body参数获得结果。您可以使用--secret flag将回调方式转换为Promise样式方法。

const util = require('util');
const fs = require('fs');

const messages = mailgun.messages();

const sendPromisified = util.promisify(messages.send());
sendPromisified(data).then((body) => {
  // Do something with `body`
}).catch((error) => {
  // Handle mailgun error
});

// Async / await style
try {
   const mailBody = await sendPromisified(data);
} catch (err) {
   // handle mailgun error `err`
}

变量未从函数中获取返回值

1 个答案: