Parse JSON HTTP response using golang

Question

I am trying to get the value of say \"ip\" from my following curl output:

{  
  \"type\":\"example\",
  \"data\":{  
    \"name\":\"abc\",
    \"labels\":{           


        

Answer 1

You can write your own decoder or use existing third-party decoders. For instance, github.com/buger/jsonparser could solve your problem by iterating throw array (two times).

package main

import (
    "github.com/buger/jsonparser"
    "fmt"
)

var data =[]byte(`{
  "type":"example",
  "data":{
    "name":"abc",
    "labels":{
      "key":"value"
    }
  },
  "subsets":[
    {
      "addresses":[
        {
          "ip":"192.168.103.178"
        }
      ],
      "ports":[
        {
          "port":80
        }
      ]
    }
  ]
}`)

func main() {
    jsonparser.ArrayEach(data, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
        jsonparser.ArrayEach(value, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
            v, _, _, err := jsonparser.Get(value, "ip")
            if err != nil {
                return
            }
            fmt.Println("ip: ", string(v[:]))
        }, "addresses")
    }, "subsets")
}

Output: ip: 192.168.103.178