node.js – 服务器端未定义的req.body

我正在研究在服务器端使用node,express,mysql的app.我已经在server.js文件上写了几个API,当我试图使用Postman访问那些时,req.body总是未定义的.

这是我的server.js配置.

var express = require('express');
var MysqL = require('MysqL');
var cors = require('cors');
var bodyParser = require('body-parser');
var Wrench = require("Wrench");
var fs = require('fs');
var path = require("path");
var mkdirp = require('mkdirp');
var walk = require('walk');
var fse = require('fs-extra');
var multipart = require('connect-multiparty');
var multipartMiddleware = multipart();
var crypto = require('crypto');

app.use(cors());

app.use(bodyParser.urlencoded({limit: '50mb',extended: false}));
app.use(bodyParser.json({limit: '50mb'}));

var connection = MysqL.createConnection({
    host: 'localhost',user: 'root',password: 'pass',database: 'dbname'
});


connection.connect(function(err) {
    if (!err) {
        console.log("Database is connected ... \n\n");
    } else {
        console.log("Error connecting database ... \n\n");
    }
});

app.post('/urlreq',function(req,res){
    console.log(req.body);
}
app.listen(3000,function(){
    console.log("Rest Demo Listening on port 3000");
});

当我尝试在Postman身上发送一些东西然后req.body在服务器端变空.

app.use(multipartMiddleware);