Question

我想调整图片大小。为此我使用nodejs和sharp模块。但是我收到一个错误，说明帖子需要回调函数而不是对象。以下是我的代码。

router.post('/uploadAvatar', 
    multer({
      dest: './public/uploads/images/avatars',
      rename: function (fieldname, filename) {
        return 'avatar'+Date.now();
      }
    }), function(req, res) {
      // resize image
      sharp(newPath).resize(300, 200).toFile(newPath, function(err) {
         if (err) {
           throw err;
         }
         res.json(newPath);
      });
  });

我收到以下错误 -

/home/chyangba/Desktop/sharptest/sharpApp/node_modules/express/lib
  /router/route.js:196
        throw new Error(msg);
            ^

    Error: Route.post() requires callback functions but got a [object Object]
    at Route.(anonymous function) [as post] (/home/chyangba/Desktop/sharptest/sharpApp/node_modules/express/lib/router/route.js:196:15)
    at Function.proto.(anonymous function) [as post] (/home/manoj/Desktop/sharptest/sharpApp/node_modules/express/lib/router/index.js:510:19)
    at Object.<anonymous> (/home/chyangba/Desktop/sharptest/sharpApp/routes/index.js:31:13)

Answer 1

您使用的是multer错误，multer（{}）返回的是一个对象而不是中间件。

var express = require('express')
var multer  = require('multer')
var upload = multer({ dest: 'uploads/' })

var app = express()

app.post('/profile', upload.single('avatar'), function (req, res, next) {
  // req.file is the `avatar` file
  // req.body will hold the text fields, if there were any
})

app.post('/photos/upload', upload.array('photos', 12), function (req, res, next) {
  // req.files is array of `photos` files
  // req.body will contain the text fields, if there were any
})

如你所见，你必须在multer对象上调用 single，array，... 来获取中间件！

尝试使用Sharp模块调整图像大小时显示错误[Nodejs]

1 个答案: