JSON GET request

jsonrequest.go

package main

import (
	"encoding/json"
	"io/ioutil"
	"log"
	"net/http"
)

// Remove anything in the structs that you don't care about, or any struct that you don't care about. Use JSON-to-Go (I am not using inline type definitions, as I prefer this way.)

// API struct
type API struct {
	Data Data `json:"data"`
}

// Uploader struct
type Uploader struct {
	Username string `json:"username"`
}

// Data struct
type Data struct {
	ID         string   `json:"id"`
	URL        string   `json:"url"`
	Uploader   Uploader `json:"uploader"`
	Resolution string   `json:"resolution"`
}

func check(text string, err error) {
	if err != nil {
		log.Fatal(text, err)
	}
}

func main() {
	// HTTP client
	client := &http.Client{}

	url := "https://wallhaven.cc/api/v1/w/5dw9q9"

	request, err := http.NewRequest("GET", url, nil)
	check("Couldn't create request:", err)

	request.Header.Add("User-Agent", "jsonrequest gist [@dps910_]")

	// Do the request and get response of http request (HTTP but not JSON)
	response, err := client.Do(request)
	status := response.Status
	protocol := response.Proto
	log.Printf("\nStatus: %s\nProtocol: %s", status, protocol)

	// Defer response body so it can be read (until surrounding functions return)
	defer response.Body.Close()

	// Read json response from response body
	JSON, err := ioutil.ReadAll(response.Body)
	check("Couldn't read JSON response:", err)
	//log.Println(string(JSON))

	/*
		So now you can see all of the data from the API that we sent a GET request to.
		If you want to get certain key/value data and use them in a database etc, you
		need to use json.Unmarshal function to unmarshal this data into structs.
		Use JSON-To-Go as it is easiest and untick "Inline type definitions"
	*/
	API := API{}
	json.Unmarshal(JSON, &API)

	// Now you can do what you want with the data..
	uploaderName := API.Data.Uploader.Username
	imgURL := API.Data.URL
	imgID := API.Data.ID
	imgResolution := API.Data.Resolution
	log.Printf("\nUploader: %s\nURL: %s\nID: %s\nResolution: %s", uploaderName, imgURL, imgID, imgResolution)
}