将 JSON 数据从 angularjs 发送到 nodejs

Question

我在从前端 angularjs 发送 json 数据以表达 nodejs 时遇到问题。这是我尝试过的。

frontend.html 页面

<form ng-submit="func()">
    <textarea name="inputtext" type="text" ng-model="sentence"></textarea>
</form>

backend.js 页面

$scope.func = function(){

 $scope.jsondata = {"status":"OK","language":"english","sentences":[{"sentence":"That's a nice restaurant."},{"sentence":"Also I went to another bad restaurant."},{"sentence":"I didn't like that movie."}]}

 $http.post('/sample',$scope.jsondata).success(function(data,status){
        console.log("Success");
     })
}

server.js

var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var bodyParser = require('body-parser');
var path = require('path');
var fs = require('fs');

app.set('views', __dirname + '/views');
app.set('view engine' , 'ejs');

app.use(bodyParser.json());
var urlencodedParser = bodyParser.urlencoded({ extended: true });

app.use(express.static('public'));

app.get('/',function(req,res){
    res.render('index',{ title: 'Sentence' });
});
app.post('/sample',urlencodedParser,function(req,res){
    console.log(req.body);
});
http.listen(8888, function(){
   console.log("Server listening on 8888");
});

我在节点服务器部分没有得到准确的 JSON。这就是我得到的。

输出

{ '{"status":"OK","language":"english","sentences":': { '{"sentence":"That\'s a nice restaurant."},{"sentence":"Also I went to another bad restaurant."},{"sentence":"I didn\'t like that movie."},{"sentence":"Thats a very bad movie."}': '' } }

任何人都可以帮忙，我怎样才能在节点服务器部分获得准确的 json。这样我就可以只解析句子字段并将其写入文件。

Answer 1

$http POST 调用，接受 Object，而不是 json。因此，您需要在将 JSON 发送到服务器之前对其进行字符串化。

$http.post('/sample',JSON.stringify($scope.jsondata)).success(function(data,status){
        console.log("Success");
     })
}

Answer 2

您是否将帖子创建为 JSON 以发送到节点？

Angular 会为您执行此操作，您可以按照 Ved 的建议在帖子中放置和反对，Angular 会神奇地将其更改为 JSON 以发送到节点服务器。

$scope.func = function(){

$scope.data = {language:"english", sentences:   [{sentence:"That's a nice restaurant."},{sentence:"Also I went to another bad restaurant."},    {"sentence":"I didn't like that movie."}]}

$http.post('/sample',$scope.data).success(function(data,status){
    console.log("Success");
 })
}

这将在服务器上读取为：[Object object]，因为 node 中的 bodyparser npm 模块会将其更改回 Object

Answer 3

在发送到服务器之前尝试将数据类型设置为 json。它将 Content-Type 标头设置为application/json，服务器可以将其理解为 json

$http({
    method: 'POST',
    url: baseUrl + '/sample',
    dataType: "json",
    data: {
        "status": "OK",
        "language": "english",
        "sentences": [{"sentence": "That's a nice restaurant."},
            {"sentence": "Also I went to another bad restaurant."},
            {"sentence": "I didn't like that movie."}]
    }
}).success(function (data, status) {

}).error(function (data, status) {

})

更新： 我尝试运行您的源代码并稍作修改，您可以检查它是否响应了您想要的正确格式。查看此仓库：https://github.com/nguyennb9/sample-angularjs-expressjs

Answer 4

使用 application/json 在标头中使用 POST 方法

 $http({
    method:'POST',
    dataType: "json",
    url: 'http://localhost:8000/saveform',
    data : $scope.user, 
    headers: {
      'Content-Type': 'application/json' 
    }
  }).success(function(data){

  });