如何使用multer和Node.js将文件上传到项目文件夹并获取其名称

Question

我需要将文件保存到文件夹中，并想要获取该文件的名称以使用Node.js保存到数据库中。

api.js：

 var multer  = require('multer')
    var storage =multer.diskStorage({
      destination: function (req, file, callback) {
        callback(null, './../uploads');
      },
      filename: function (req, file, callback) {
        callback(null, file.fieldname + '-' + Date.now());
      }
    });
    exports.saveCardDetails=function(upload.single('image'),req,res){
    var name=req.body.name;
    var company=req.body.company;
    var position=req.body.position;
    var mobile=req.body.mobile;
    var email=req.body.email;
    var landline=req.body.landline;
    var url=req.body.url;
    var postcode=req.body.postcode;
    var address=req.body.address;
    var image=req.body.image;
    var userid=req.body.userid;
    var profiletext=req.body.profile;
    var biography=req.body.biography;
    var token_id=req.body.token_id;
    console.log('request',req);
}

server.js：

var express=require('express');
var morgan = require('morgan');
var http=require('http');
var bodyParser= require('body-parser');
var methodOverride = require('method-override');
var mongo = require('mongojs');
var session = require('express-session');
var app=module.exports=express();
var server=http.Server(app);
var port=8989;
var admin=require('./route/route.js');
var api=require('./api/api.js');
app.use(express.static(__dirname + '/public'));     // set the static files location /public/img will be /img for users
app.use(morgan('dev'));                     // log every request to the console
app.use(bodyParser.urlencoded({ extended: false }))    // parse application/x-www-form-urlencoded
app.use(bodyParser.json())    // parse application/json
app.post('/api/users/save-card-details',api.saveCardDetails);

在此之后，我得到以下错误：

POST /api/users/save-card-details 413 13.277 ms - 1120
Error: request entity too large
    at readStream (/opt/lampp/htdocs/heroku/FGDP/node_modules/raw-body/index.js:196:17)
    at getRawBody (/opt/lampp/htdocs/heroku/FGDP/node_modules/raw-body/index.js:106:12)
    at read (/opt/lampp/htdocs/heroku/FGDP/node_modules/body-parser/lib/read.js:76:3)
    at urlencodedParser (/opt/lampp/htdocs/heroku/FGDP/node_modules/body-parser/lib/types/urlencoded.js:115:5)
    at Layer.handle [as handle_request] (/opt/lampp/htdocs/heroku/FGDP/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/opt/lampp/htdocs/heroku/FGDP/node_modules/express/lib/router/index.js:312:13)
    at /opt/lampp/htdocs/heroku/FGDP/node_modules/express/lib/router/index.js:280:7
    at Function.process_params (/opt/lampp/htdocs/heroku/FGDP/node_modules/express/lib/router/index.js:330:12)
    at next (/opt/lampp/htdocs/heroku/FGDP/node_modules/express/lib/router/index.js:271:10)
    at logger (/opt/lampp/htdocs/heroku/FGDP/node_modules/morgan/index.js:144:5)

在这里，我正在获取图像，需要将其保存到文件夹中。 保存到文件夹后，我需要将文件名保存到exports.saveCardDetails函数中。 我的文件夹结构如下。

--> api/api.js

--> upload

我为此使用multer npm软件包。

Answer 1

看起来multer无法处理大文件。

尝试像这样在multer配置中设置fieldSize变量-

multer({
    storage: storage,
    limits: { fileSize: maxSize }
 })

您可以在这里找到这些设置-https: //www.npmjs.com/package/multer （搜索限制）。 希望这可以帮助！