SyntaxError：位置1的JSON中的意外标记o EXPRESS

Question

我正在使用Express中的REST Web服务，我希望得到一个包含我在参数中放置的小时数的对象。

var express = require('express');
var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
    res.render('index', { title: 'Express' });
});

router.get('/test', function(req, res) {
    var	responseObject = { messages: 'OK' };
    res.send(responseObject);
})

router.get('/api/consommation/:heure', function(req, res) {
    var	heure = req.query.heure;
    var responseObject = [{
        "heure": "08",
        "prix": "0.1593"
    }, {
        "heure": "09",
        "prix": "0.1593"
    }, {
        "heure": "01",
        "prix": "0.1252"
    }, {
        "heure": "02",
        "prix": "0.1252"
    }, {
        "heure": "03",
        "prix": "0.1252"
    }];

    var jsonContent = JSON.parse(responseObject);
        jsonContent.forEach(function(obj) {
        obj.forEach(function(o) {
            if (o['heure'] == heure) 
                console.log(o);     
        });
    });

    res.json(jsonContent);
});

module.exports = router;

所以我想返回包含参数及其价格中输入小时数的对象。

Answer 1

错误就在那里因为你试图在JS对象上使用JSON.parse而不是字符串（该方法用于解析JSON字符串）。

只需放弃var jsonContent = JSON.parse(responseObject);行并直接使用responseObject即可。

Answer 2

直接使用responseObject并移除内部foreach循环。

＆＃13;

＆＃13;

heure = 01; 
var responseObject = [
    {
        "heure": "08",
        "prix": "0.1593"
    },
    {
        "heure": "09",
        "prix": "0.1593"
    },
    {
        "heure": "01",
        "prix": "0.1252"
    },
    {
        "heure": "02",
        "prix": "0.1252"
    },
    {
        "heure": "03",
        "prix": "0.1252"
    }
];

responseObject.forEach(function (obj) {
        if (obj['heure'] == heure)
            console.log(obj);
})

＆＃13;

＆＃13;

＆＃13;

Answer 3

不需要var jsonContent = JSON.parse(responseObject);因为json已经全部解析了。

替换

var jsonContent = JSON.parse(responseObject);

通过

var jsonContent =responseObject;

Answer 4

这是最终守则：

＆＃13;

＆＃13;

var express = require('express');
var router = express.Router();

/* GET home page. */
router.get('/', function(req, res, next) {
  res.render('index', { title: 'Express' });
});

router.get('/test', function(req, res){
	var	responseObject = {messages : 'OK'};
	res.send(responseObject);
})

router.get('/api/consommation', function(req, res, next){
	var	heure = req.param('heure');
	var responseObject = [ 

        { "heure" :"08",
          "prix" : "0.1593" },
        { "heure" :"09",
          "prix" : "0.1593" },
        { "heure" :"10",
          "prix" : "0.1593" },
        { "heure" :"11",
          "prix" : "0.1593" },
        { "heure" :"12",
          "prix" : "0.1593" },
        { "heure" :"13",
          "prix" : "0.1593" },
        { "heure" :"14",
          "prix" : "0.1593" },        
        { "heure" :"15",
          "prix" : "0.1593" },  
        { "heure" :"16",
          "prix" : "0.1593" },
        { "heure" :"17",
          "prix" : "0.1593" },
        { "heure" :"18",
          "prix" : "0.1593"},
        { "heure" :"19",
          "prix" : "0.1593" },
        { "heure" :"20",
          "prix" : "0.1593" },
        { "heure" :"21",
          "prix" : "0.1593" },
        { "heure" :"22",
          "prix" : "0.1593" },
        { "heure" :"23",
          "prix" : "0.1593" },
        { "heure" :"00",
          "prix" : "0.1252" },
        { "heure" :"01",
          "prix" : "0.1252"},
        { "heure" :"02",
          "prix" : "0.1252" },
        { "heure" :"03",
          "prix" : "0.1252" }, 
       { "heure" :"04",
          "prix" : "0.1252" }, 
       { "heure" :"05",
          "prix" : "0.1252" },
       { "heure" :"06",
          "prix" : "0.1252" },
       { "heure" :"07",
          "prix" : "0.1252" },
   
 ];
  responseObject.forEach(function (obj) {
        if (obj['heure'] == heure)
            res.json(obj);
        else
          return next;

  });

});

module.exports = router;

＆＃13;

＆＃13;

＆＃13;

我的主要问题是我没有把下一个＆＃39;我的函数中的参数，稍后再返回 谢谢你们所有人