javascript - 试图遍历一个节点得到休息返回

Question

我正在尝试遍历通过 get 请求返回的数据。我试图像使用 JSON 格式一样遍历它，但我对此很陌生，不确定它是否返回它以 JSON 格式识别的内容，或者它是否将其识别为字符串，这就是为什么我无法让它识别诸如 info.data.items 之类的东西。这是我使用节点的获取请求，基本身份验证。

这是从我的 get 请求返回的示例数据以及我实际尝试迭代的内容。

{"data":{"items":[{"date":"2017-02-02","revenue":111,"impressions":000},{"date":"2017-02-03","revenue":123,"impressions":0000,},"message":"Top 2 rows returned."}

function rData(key, secret, account_id) {

  var https = require('https');

  var options = {

    host: 'api.urlhere.com',
    port: 443,
    path: 'path',

    // authentication headers

    headers: {

      'Authorization': 'Basic ' + new Buffer(key + ':' + secret).toString('base64')

    }
  };
  var request = https.get(options, function(res) {

    var body = "";

    res.on('data', function(data) {

      body += data;

    });

    res.on('end', function() {

      //console.log(body);
      callNextFunction(body);
    })

    res.on('error', function(e) {

      console.log("Got error: " + e.message);

    });
  });
}

然后这是我尝试迭代数据的下一个函数。通过这个函数后，我得到了错误，

TypeError: Cannot read property 'items' of undefined

function callNextFunction(rBody) {

  var rData = rBody;

  console.log("Data transfer sucessful: " + rData); // Works up to this point.

  rData.data.items.forEach(function(info) {

    var rev = info.revenue;
    console.log("Revenue: " + rev);
  })
}

Answer 1

查看您的 JSON 我可以看到以下问题

{"data":{"items":[{"date":"2017-02-02","revenue":111,"impressions":000},{"date":"2017-02-03","revenue":123,"impressions":0000,},"message":"Top 2 rows returned."} <-- this should probably be a ']' not sure

根据您的问题，我认为您想要访问数据的属性。尝试以下操作

function callNextFunction(rBody) {

  var rData = JSON.parse(rBody);

  console.log("Data transfer sucessful: " + rData); // Works up to this point.
  $.each(rData.data.items, function(i, info) {
    if (info.date) {
       //this info will contain the item with "date" "revenue"...
       var rev = info.revenue;
       console.log("Revenue: " + rev);
    }
    else if (info.message) {
        // this is the information that contains the "message":"Top 2 rows returned."
    }
  });
}