Multer 没有填充 req.body 和 req.file答案

【问题标题】：Multer is not populating req.body and req.fileMulter 没有填充 req.body 和 req.file
【发布时间】：2017-11-24 12:47:14
【问题描述】：

我正在使用 Multer 在 keystone 环境中解析多部分表单，但无法访问我的路由控制器内的 req.body 和 req.file 数据

路由/index.js

var keystone = require('keystone'),
    middleware = require('./middleware');

var bodyParser = require('body-parser');

//multi-part form parser for FTP api
var multer = require('multer');
var storage = multer.memoryStorage();
var upload = multer({storage: storage});

exports = module.exports = function(app) {
    app.use(bodyParser.json({limit: '10mb'}));
    app.use(bodyParser.urlencoded({limit: '10mb', extended: true}));
    app.post('/upload_api', upload.single('formFile'), routes.api.uploadFTP);
};

routes/api/uploadFTP.js

var keystone = require('keystone');
var ftpMod = require('ftp');
var fs = require('fs');

exports = module.exports = function(req, res) {
    console.log("req.body is ");
    console.log(req.body);
    console.log("req.file is ");
    console.log(req.file);
    res.send("console.log() outputted to screen");
}

public/test-upload.html

<html>
    <body>
        <form name="sampleForm" enctype="multipart/form-data" action="/upload_api" method="post">
            <p>Method</p>
            <input type="text" name="method"><br>
            <p>Options</p>
            <input type="text" name="options"><br>
            <p>File</p>
            <input type="file" name="formFile"><br><br>
            <input type="submit" value="Click to Send">
        </form>
    </body>
</html>

我从 nodejs 收到的响应是

>req.body is 
{}
req.file is 
undefined

我希望 req.body 包含 {method: "sometext"} 和req.file 被填充

【问题讨论】：

标签： node.js express multer keystone form-processing

【解决方案1】：

您无法获取req.body 或req.file 中的值。用下面给定的代码替换你的uploadFTP.js。

var multer = require('multer');
var path = require('path');

var storage = multer.diskStorage({
  destination: function(req, file, callback) {
    callback(null, <<path where you want to store your files>>);
  },
  filename: function(req, file, callback) {
    callback(null, path.basename(Date.now() + '_' + file.originalname));
  },
});
var maxSize = 1024 * 1024;
var upload = multer({
  storage: storage,
  fileFilter: function(req, file, callback) {
    var ext = path.extname(file.originalname);
    if(ext !== '.gif' && ext !== '.jpeg') {
      return callback(res.status(202).end();, null);
    }
    callback(null, true);
  },
  limits: {fileSize: maxSize},
}).single('image');

exports = module.exports = function (req, res) {

  upload(req, res, function(err) {
    console.log(storage.diskStorage);
    if(err) {
      return res.status(201).end();
    }
    //Do stuff here
    res.status(200).end();
  });
}

在 index.js 中替换下面的行

app.post('/upload_api', upload.single('formFile'), routes.api.uploadFTP);

与

app.post('/upload_api', routes.api.uploadFTP);

【讨论】：

我对从 index.js 中删除 upload.single('formFile') 中间件感到困惑我也对 uploadFTP.js 文件中的函数 upload(req, res, function(err){}): 感到困惑。 upload.single() 去哪儿了？这一切似乎与 express/multer 提供的文档大不相同
文档中的示例代码是 var multer = require('multer'); var storage = multer.memoryStorage(); var upload = multer({ storage: storage }); app.post('/profile', upload.array(), function (req, res, next) { // req.body 包含文本字段 });
这是我的应用程序的工作代码。如果你愿意，你可以保留中间件。我已经从实际方法中调用了 upload.Single()
谢谢你的例子。它不工作。该文件没有放在我期望的位置，我仍然无法访问 req.file 或 req.body.method