Question posted in Json
Our archive of expertly curated questions and answers provides insights and solutions to common problems related to this popular data interchange format. From parsing and manipulating JSON data to integrating it with various programming languages and web services, our archive has got you covered. Start exploring today and take your JSON skills to the next level

I want to format my JSON to Golang unmarshelled output.I can't see a thing there

KalanaMadusara
October 27, 2023
270 views
0 votes
2 Answers

I want to format my JSON to Golang unmarshelled output.I can’t see a thing there.

// Create an HTTP client with the API key.
client := &http.Client{}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
    log.Fatal("Error creating request:", err)
}
req.Header.Add("Authorization", "Bearer "+apiKey)

// Make the HTTP request to fetch JSON data.
resp, err := client.Do(req)
if err != nil {
    log.Fatal("Error making HTTP request:", err)
}
defer resp.Body.Close()

// Read the JSON response into a byte slice.
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
    log.Fatal("Error reading JSON data:", err)
}

// Unmarshal the JSON data into a map.
var target map[string]interface{}
err = json.Unmarshal(data, &target)
if err != nil {
    log.Fatalf("Unable to unmarshal JSON due to %s", err)
}

i done this and got,

map[droplets:[map[backup_ids:[1.4132617e+08 1.41783892e+08 1.42227987e+08 1.42667107e+08 1.43107709e+08] created_at:2020-06-04T17:40:05Z disk:50 features:[backups monitoring private_networking ipv6] id:1.94861944e+08 image:map[created_at:2020-05-15T05:47:50Z description:Ubuntu 20.04 x86 distribution:Ubuntu id:6.366398e+07 min_disk_size:20 name:20.04 (LTS) x64 public:false regions:[] size_gigabytes:2.36 slug: status:retired tags:[] type:base] kernel: locked:false memory:4096 name:staging-02 networks:map[v4:[map[gateway:10.104.0.1 ip_address:10.104.0.2 netmask:255.255.240.0 type:private] map[gateway:128.199.64.1 ip_address:128.199.111.88 netmask:255.255.192.0 type:public]] v6:[map[gateway:2400:6180:0:d0::1 ip_address:2400:6180:0:d0::e6d:6001 netmask:64 type:public]]] next_backup_window:map[end:2023-11-02T20:00:00Z start:2023-11-02T16:00:00Z] region:map[available:true features:[backups ipv6 metadata install_agent storage image_transfer] name:Singapore 1 sizes:[s-1vcpu-512mb-10gb s-1vcpu-1gb s-1vcpu-1gb-amd s-1vcpu-1gb-intel s-1vcpu-1gb-35gb-intel s-1vcpu-2gb s-1vcpu-2gb-amd s-1vcpu-2gb-intel s-1vcpu-2gb-70gb-intel s-2vcpu-2gb s-2vcpu-2gb-amd s-2vcpu-2gb-intel s-2vcpu-2gb-90gb-intel s-2vcpu-4gb s-2vcpu-4gb-amd s-2vcpu-4gb-intel s-2vcpu-4gb-120gb-intel c-2 c2-2vcpu-4gb s-4vcpu-8gb s-4vcpu-8gb-amd s-4vcpu-8gb-intel g-2vcpu-8gb s-4vcpu-8gb-240gb-intel gd-2vcpu-8gb m-2vcpu-16gb c-4 c2-4vcpu-8gb s-8vcpu-16gb m3-2vcpu-16gb s-8vcpu-16gb-amd s-8vcpu-16gb-intel g-4vcpu-16gb s-8vcpu-16gb-480gb-intel so-2vcpu-16gb m6-2vcpu-16gb gd-4vcpu-16gb so1_5-2vcpu-16gb m-4vcpu-32gb c-8 c2-8vcpu-16gb m3-4vcpu-32gb g-8vcpu-32gb so-4vcpu-32gb m6-4vc………

i want this to be more formatted how to do it.I want to extract the variables inside this and then do some calculations but this seems a mess .I cant work with this how to format it?

// Create an HTTP client with the API key.
client := &http.Client{}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
    log.Fatal("Error creating request:", err)
}
req.Header.Add("Authorization", "Bearer "+apiKey)

// Make the HTTP request to fetch JSON data.
resp, err := client.Do(req)
if err != nil {
    log.Fatal("Error making HTTP request:", err)
}
defer resp.Body.Close()

// Read the JSON response into a byte slice.
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
    log.Fatal("Error reading JSON data:", err)
}

// Unmarshal the JSON data into a map.
var target map[string]interface{}
err = json.Unmarshal(data, &target)
if err != nil {
    log.Fatalf("Unable to unmarshal JSON due to %s", err)
}

i done this and got,

i want this to be more formatted how to do it.I want to extract the variables inside this and then do some calculations but this seems a mess .I cant work with this how to format it?

Tags: api data-structures go json maps

Answers

To make the JSON data more readable and structured, you can use the json.MarshalIndent function to marshal the data back into a formatted JSON string. Here’s how you can do it:

// Create an HTTP client with the API key.
client := &http.Client{}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
    log.Fatal("Error creating request:", err)
}
req.Header.Add("Authorization", "Bearer "+apiKey)

// Make the HTTP request to fetch JSON data.
resp, err := client.Do(req)
if err != nil {
    log.Fatal("Error making HTTP request:", err)
}
defer resp.Body.Close()

// Read the JSON response into a byte slice.
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
    log.Fatal("Error reading JSON data:", err)
}

// Unmarshal the JSON data into a map.
var target map[string]interface{}
err = json.Unmarshal(data, &target)
if err != nil {
    log.Fatalf("Unable to unmarshal JSON due to %s", err)
}

// Marshal the map back into a formatted JSON string.
formattedJSON, err := json.MarshalIndent(target, "", "  ")
if err != nil {
    log.Fatal("Error formatting JSON:", err)
}

// Now you have the formatted JSON in the 'formattedJSON' variable.
fmt.Println(string(formattedJSON))

You can write a utility function that can beautifully print any given struct/map/slice:

func JSONStringify(obj interface{}) {
    beautifulJsonByte, err := json.MarshalIndent(obj, "", "  ")
    body := ""
    if err != nil {
        body = fmt.Sprintf("%v", obj)
    } else {
        body = string(beautifulJsonByte)
    }
    
    fmt.Println(string(beautifulJsonByte))
}

Usage:

var target map[string]interface{}

err = json.Unmarshal(data, &target)
if err != nil {
    log.Fatalf("Unable to unmarshal JSON due to %s", err)
}

JSONStringify(target)

Please signup or login to give your own answer.

Click here to cancel reply.