Mongodb插入数据API没有响应

Question

我需要一个API从Android插入数据到mongodb，我遵循this，代码可以运行，没有错误，并且我使用POSTMAN尝试发布一些数据，它总是说无法获取任何答复，似乎有错误连接到192.168.1.105:3000/songs ，但我可以使用查找所有api和findByID。 这花了我数小时的时间，请大家帮忙，所以压低:(

app.js

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

songs = require('./routes/route'); 
var jsonParser = bodyParser.json(); 

app.post('/songs', jsonParser, function (req, res) { 
if (!req.body) return res.sendStatus(400); 


app.get('/', function (req, res) { 
res.send('Hello World!'); 
}); 

app.listen(3000, function() { 
console.log('Example app listening on port 3000!'); 
}); 


app.get('/songs',songs.findAll); 
app.get('/findById/:id',songs.findById); 
app.get('/songs',songs.addSong); 

路线

var mongoose = require('mongoose'); 
var mongo = require('mongodb'); 
var uri = "mongodb://XXXX:XXXX@ds061365.mongolab.com:61365/aweitest"; 
mongoose.connect(uri); 
// we're connected! 
var db = mongoose.connection.db; 
var BSON = require('bson').BSONPure; 
var body = require('body-parser'); 


db.on('error', console.error.bind(console, 'connection errrrrrrrror:')); 
db.once('open', function() { 
console.log("mongodb is connected!!"); 
}); 

exports.findAll = function(req, res) { 
db.collection('songs',function(err, collection) { 
collection.find().toArray(function(err, items) { 
    res.send(items); 
    }); 
    }); 
    }; 


exports.findById = function(req, res) { 
var id = req.params.id; 
console.log('Retrieving song: ' + id); 
db.collection('songs', function(err, collection) 
collection.findOne({'_id':new BSON.ObjectID(id)}, function(err, item) { 
    res.send(item); 
}); 
}); 
}; 


exports.addSong = function(req, res) { 
var song = req.query; 
console.log('Adding song: ' + JSON.stringify(song)); 
db.collection('songs', function(err, collection) { 
collection.insert(song, {safe:true}, function(err, result) { 
{console.log('Success: ' + JSON.stringify(result[0])); 
res.send(result[0]); 

} 
}); 
}); 
}; 

Answer 1

好了，所以我在你的代码改变了一些东西。我成功获取app.js文件中的请求主体请看代码

route.js

var mongoose = require('mongoose'); 
var mongo = require('mongodb'); 
var uri = "mongodb://localhost:27017/test"; 
mongoose.connect(uri); 
// we're connected! 
var db = mongoose.connection.db; 
var BSON = require('bson').BSONPure; 
var body = require('body-parser'); 
db.on('error', console.error.bind(console, 'connection errrrrrrrror:')); 
//db = mongoose.connection.db; 
db.once('open', function() { 
    console.log("mongodb is connected!!"); 
}); 

exports.addSong = function(req, res) { 
var song = req.body; 
console.log('Adding song: ' + JSON.stringify(song)); 
db.collection('songs', function(err, collection) { 
    collection.insert(song, {safe:true}, function(err, result) { 
     if (err) { 
     res.send({'error':'An error has occurred'}); 
     } else { 
     console.log('Success: ' + JSON.stringify(result[0])); 
     res.send(result[0]); 
     } 
    }); 
}); 
} 

请注意，我已将URI更改为localhost，因此请将其更改为您指定的URI。

app.js

var express = require('express'); 
var app = express(); 
var bodyParser = require('body-parser'); 
app.use(bodyParser.json()); // support json encoded bodies 
app.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies 
songs = require('./routes/route'); 

app.post('/songs', function(req, res) { 
    console.log("Request.Body : " + JSON.stringify(req.body)); 
    if (!req.body) return res.sendStatus(400); 
    songs.addSong(req, res); 
}); 

app.get('/', function (req, res) { 
    res.send('Hello World!'); 
}); 

app.listen(3000, function() { 
    console.log('Example app listening on port 3000!'); 
}); 

app.get('/songs',songs.addSong); 

由于您唯一的问题是，你是不是能够得到请求主体。您将可以通过此代码获取它。

此外，由于你的app.get('/songs',songs.addSong);是类型的GET，你就无法通过它来发送POST 数据。因此，将其更改为

app.post('/songs',songs.addSong);

希望这有助于。