Express無法讀取PUT請求中req.data的屬性值

Question

我已經使用express編寫了簡單的PUT服務。現在當我打電話給PUT服務並傳遞數據時，我發現了一些奇怪的東西。當我使用req.data讀取數據時，我可以看到我傳遞的數據。但是當我嘗試進入req.data的屬性時，我得到一個未定義的。

這裏是我的app.js

module.exports = function (data) { 

    var express = require('express'); 
    var path = require('path'); 
    var routes = require('./routes/index')(data); 
    var bodyParser = require('body-parser'); 

    var app = express(); 

    // all environments 
    app.set('port', process.env.PORT || 3000); 
    app.set('views', path.join(__dirname, 'views')); 
    app.set('view engine', 'jade'); 

    app.use(bodyParser.json()); 
    app.use(bodyParser.urlencoded({ extended: false })); 
    app.use(express.static(path.join(__dirname, 'public'))); 
    app.use(function (req, res, next) { 

     res.set('X-Powered-By', 'Flight Tracker'); 

     next(); 

    }); 

    //CORS middleware 
    app.use(function(req, res, next) { 
     res.header('Access-Control-Allow-Origin', 'http://127.0.0.1:63018'); 
     res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE'); 
     res.header('Access-Control-Allow-Headers', 'Content-Type'); 

     next(); 
    }); 

    app.put('/newflight', routes.create); 

    return app; 

}; 

這裏是飛行

var Flight = function() { 
    this.data = { 
     number: null, 
     origin: null, 
     destination: null, 
     departs: null, 
     arrives: null, 
     actualDepart: null, 
     actualArrive: null 
    }; 

    this.fill = function (info) { 
     for (var prop in this.data) { 

      if (this.data[prop] !== 'undefined') { 
       this.data[prop] = info[prop]; 
      } 
     } 
    }; 

    this.triggerDepart = function() { 
     this.data.actualDepart = Date.now(); 
    }; 
    this.triggerArrive = function() { 
     this.data.actualArrive = Date.now(); 
    }; 
    this.getInfo = function() { 
     return this.data; 
    }; 

}; 


//Serving as factory to create instances of Objects 

module.exports = function (info) { 

    var instance = new Flight();  
    instance.fill(info);  
    return instance; 

} 

這裏是我的路線

module.exports = function (data) { 

     var flight = require('../flight'); 

     for (var number in data) { 

      console.log(data[number]); 
      data[number] = flight(data[number]); 
     }; 

     var functions = {}; 

     functions.create = function(req,res){ 
      if(!req.body) { 
       return res.sendStatus(400); 
      } else{ 
       console.log(req.body); 
       console.log(req.body.number); 
       console.log(req.body.origin); 
       console.log(req.body.destination); 
       var number = req.body.number;    
       data[number] = flight(req.body); 
       console.log(data[number]); 

       res.json({ 
        status:202, 
        statusText:"Entries have been created", 
        data:data 
       }); 
      } 


     }; 

     return functions; 

    } 

我也有從上面的輸出創建方法：

任何想法爲什麼會發生這種情況？

Answer 1

基本上我的postdata是不正確的。當我只傳遞postdata時，我傳遞postdata.data。這解決了這個問題。 另外我在頭文件中添加了'Content-Type'：'application/json'。