使用node.js解析在线xml文档中的标签的问题

Question

so I'm trying to create an application for the Google Assistant and the data for my application is stored in an online XML, however, I am not sure how I am supposed to extract the specific data that I require from the XML.

I have tried to fix this by indexing the results of the XML parser however I receive either undefined errors or cannot read property errors.

 var eyes = require('eyes');
 var https = require('https');
 var fs = require('fs');
 var xml2js = require('xml2js');
 var parser = new xml2js.Parser({ attrkey: "ball"});

 parser.on('error', function(err) { console.log('Parser error', err); });

 var data = '';
 https.get('https://www.national-lottery.co.uk/results/euromillions/draw-history-full/xml', function(res) {
     if (res.statusCode >= 200 && res.statusCode < 400) {
       res.on('data', function(data_) { data += data_.toString(); });
       res.on('end', function() {
         console.log('data', data);
         parser.parseString(data, function(err, result) {
            toUse = result['draw-results']['game']['balls']['ball'][1];
            console.log(toUse);
            console.log('FINISHED', err, result);
         });
       });
     }
   });

I expect to receive an output of the first ball number called, however, I cannot get the data out other than printing the entire XML.

Answer 1

我得到的输出4的路径result['draw-results'].game[0].balls[0].ball[0]['_']