JSON

Decoding

Input

{
  "router": [
    {
      "hostname": "router1.example.com",
      "ip": "192.0.2.1",
      "asn": 64512
    },
    {
      "hostname": "router2.example.com",
      "ip": "198.51.100.1",
      "asn": 65535
    }
  ]
}

Code

Decode reads the next JSON-encoded value from its input and stores it in the value pointed to by v.

func main() {
	file, err := os.Open("input.json")
	if err != nil {
		panic(err)
	}
	defer file.Close()
	src := json.NewDecoder(file)

	var inv Inventory
	err = src.Decode(&inv)
	if err != nil {
		panic(err)
	}

	fmt.Printf("%+v\n", inv)
}

Output

⇨  go run main.go 
{Routers:[{Hostname:router1.example.com IP:192.0.2.1 ASN:64512} {Hostname:router2.example.com IP:198.51.100.1 ASN:65535}]}