Nodejs 和 Express 中的 Multer 图像上传

几天来我一直在尝试使用 Multer 上传图像。这就是我已经走了多远。我尝试了多种方法，但似乎无法使其发挥作用。我不知道如何使用 Multer 在 createUser 函数中按如下所示的格式上传图像。

我的“server.js”文件：

var express = require('express');
var multer = require('multer');
var upload = multer({dest: 'uploads/'});
var router = require('./app/routes');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var session = require('client-sessions');
var DB_URI = "mongodb://localhost:27017/portfolio";
var app = express();
var path = require('path');
var fs = require('fs');
app.set('view engine', 'ejs');
app.use(bodyParser.urlencoded({extended:false}));
app.use(express.static(__dirname+ '/public'));
app.use(session({
  cookieName: 'session',
  secret: 'random_string_goes_here',
  duration: 30 * 60 * 1000,
  activeDuration: 5 * 60 * 1000,
}));

mongoose.connect(DB_URI);
app.use(router);

app.listen(8080, function(){
    console.log("server is listening on port 8080");
})

我的“routes.js”

var express = require('express');
var router = express.Router();
var projectController = require('./controllers/projectController');
var userController = require('./controllers/userController');
router.post('/regUser', userController.createUser);

我的“index.ejs”

<form class="form inv" method="POST" action="/regUser" id="reg_form">
          <h3 style="margin-bottom:40px;">Register</h3>
          <!-- <input type="file" name="file"/> -->
          <input type="text" class="form-control" name="name" placeholder="Name"/>
          <input type="text" class="form-control" name="username" placeholder="Username"/>
          <input type="text" class="form-control" name="email" placeholder="Email"/>
          <input type="password" class="form-control" name="password" placeholder="Password"/>
          <input type="file" name="userPhoto"/>
          <input type="submit" class="btn btn-default" value="Submit"/>
        </form>

我的 userController.js

createUser: function(req, res){
//add code to create user AND upload image
}

有两个问题。

首先：您的表单没有设置 enctype 属性。enctype="multipart/form-data"需要提交文件才能工作。

第二：你需要multer，但你没有使用它。添加这个

app.use(multer({ dest: '/tmp/'}).single('userPhoto'))

（或用另一种方法（查看文档 https://www.npmjs.com/package/multer), like .array() or .fields())

然后您可以访问该文件createUser()像这样：

createUser: function(req, res){
    console.log(req.file); // this displays the userPhoto's properties
    fs.readFile(req.file.path, function (err, data) {
        // do something with the file data
    }
}