我怎样才能最容易地将这个 HTTP 响应解析为 JSON 然后访问 responseText 字段？

Question

I'm trying to parse the plaintext that's returned from this URL -- https://www.cloudflare.com/cdn-cgi/trace -- in order to read the IP address value. This is the code snippet I'm using for the request:

 ipAddress = $.get('https://www.cloudflare.com/cdn-cgi/trace', function(data) { return data; });

When logged in browser console, the response looks like the following:

I've tried using JSON.stringify() , accessing responseText using ['responseText'] , as well as .responseText .. but no luck.

How can this response be parsed so that I can most easily access the ip value from within responseText ?

Answer 1

$.get("https://www.cloudflare.com/cdn-cgi/trace", function(data) {
  const [ ,ip ] = data.match(new RegExp("ip=" + "(.*)" + "\n"));
  console.log(ip);
});

Outputs

"2a01:cb18:362:2200:e90e:fb09:8445:6302"

Answer 2

You can either parse on carriage return or simply look for the ip= in the string or use a regex search it.

If you look at ipAddress.reponseText it's a carriage return delimited string. so

var myip=ipAddress.responseText.split('\n');
console.log(myip[2]); 'the text ip=192.168.1.10  for example if it's always in the same position.  

If it's not in the same position then look through the array to find it.

Answer 3

its return document as response, so i'm not pretty clear about JSON, here some way

 const ipAddress = $.get('https://www.cloudflare.com/cdn-cgi/trace', function (data) { const arr = data.split("\n") const ip = arr.filter(v => v.includes("ip="))[0] console.log(ip.split("=")[1]) });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>