NodeJS：-如何使用multer在mongo DB中存储表单中的图像并将相同的图像作为附件发送到邮件

Question

I was implementing a website where the user inputs details. There is also an option for the user to attach images/pdf (less than 5MB) in the form. I wanted to store the entire image in my MongoDB as well as send the image to my mail account using node nodemailer.

Everything else is working that is I am able to send the mail with the details inputted by the user, but can't save image in my database or send it to a mail account.

The below is the code I have implemented

server.js:-

const express = require("express");
const multer = require('multer');
const path = require('path');
const app = express ();
app.set("view engine", "ejs");
const mongoose= require("mongoose");
const router = express.Router();
const nodemailer = require('nodemailer');
const smtpTransport = require('nodemailer-smtp-transport');

const User=require("./models/User");

// Multer image start
const storage = multer.diskStorage({
    destination: function(req, file, cb) {
      cb(null, './public/uploads/');
    },
    filename: function(req, file, cb) {
      cb(null, new Date().toISOString().replace(/:/g, '-') + file.originalname); //replace is used to save in computer readable format
    }
  });

const upload = multer({
    storage: storage,
    limits: {
      fileSize: 1024 * 1024 * 5
    }
});

mongoose.connect("mongodb://localhost/emergen");
var bodyParser = require('body-parser');

//Middleware
app.use(express.static(__dirname + '/public'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));


var uploadFile = upload.single('image');
app.post('/send', uploadFile, (req, res) => {

    var name = req.body.name;
    var email = req.body.email;
    var phone = req.body.phone;
    var message = req.body.message;
    var image = req.file.originalname;
    var newUser= {name:name,email:email,phone:phone,message:message,image:image};

    User.create(newUser,function(err,newCreatedUser){
        if(err){
            console.log(err);
        }
        else{
            console.log(newCreatedUser);
        }
    })

    // Mailer implementation
    var output = `
      <p>You have a new Contact Request from Emergen Website</p>
      <h3>Contact Details</h3>
      <ul>  
        <li>Name: ${req.body.name}</li>
        <li>Email: ${req.body.email}</li>
        <li>Phone: ${req.body.phone}</li>
        <li>Phone: ${req.file.path}</li>
      </ul>
      <h3>Message</h3>
      <p>${req.body.message}</p>
    `;
    // <h3>Attachment</h3>  Attachments if need to be added above in output
    // <p>${req.body.attachment}</p>

    var transporter = nodemailer.createTransport(smtpTransport({
        service: 'gmail',
        host: 'smtp.gmail.com',
        auth: {
          user: 'JackRogers@gmail.com',
          pass: '******'
        }, tls:{
            rejectUnauthorized:false  // remove when uploading on server
          }
      }));

      var mailOptions = {
        from: 'qwerty@gmail.com',
        to: 'asd@gmail.com',
        subject: 'New Enquiry for Emergen',
        text: 'That was easy!',
        html: output
      };

      transporter.sendMail(mailOptions, function(error, info){
        if (error) {
          console.log(error);
        } else {
          console.log('Email sent: ' + info.response);
        }
        res.redirect('/contact-us');
      }); 
});

My model, User.js:-

    const mongoose=require("mongoose");

    const UserSchema= new mongoose.Schema({
        name:String,
        email:String,
        phone:Number,
        message:String,
        image: { data: Buffer, contentType: String }
    });

module.exports= mongoose.model("User",UserSchema);

my form, contact-us.ejs:-

<form class="text-center border border-light p-5" method="POST" action="send" enctype="multipart/form-data">

                                <p class="h4 mb-4">Contact us</p>

                                <!-- Name -->
                                <input type="text" id="FormName" class="form-control mb-4" placeholder="Name" name="name" required>

                                <!-- Email -->
                                <input type="email" id="FormEmail" class="form-control mb-4" placeholder="E-mail" name="email" required>

                                <input type="text" id="FormContact" class="form-control mb-4" placeholder="Contact No" name="phone" required>

                                <!-- Message -->
                                <div class="form-group">
                                    <textarea class="form-control rounded-0" id="exampleFormControlTextarea2" rows="5" placeholder="Message" name="message" required></textarea>
                                </div>
                                <!-- Attachment -->
                                <div class="form-group">
                                    <label for="name">Document Upload:</label>
                                    <input type="file" class="form-control" id="image" name="image" >
                                </div>                            
                                <!-- Send button -->
                                <button class="btn btn-info btn-block" type="submit">Send</button>

                            </form>

Please help me.Stuck on it for a while now

Answer 1

Saving image in database is considered very bad practice.

Preferable way is to :

1. upload image to your server directory or some file hosting site.
2. get url of image from your local server or file hosting server.
3. saved that address in your database.
4. use that address as image src.