Read dynamic or unknown JSON response.

http_request.go

package main

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
)

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

	resp, err := client.Get("https://jsonplaceholder.typicode.com/todos/1")

	if err != nil {
		fmt.Println("Error:", err)
		return
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("Error:", err)
		return
	}

	jsonData := []byte(body)
	var result interface{}
	err = json.Unmarshal(jsonData, &result)
	if err != nil {
		fmt.Println("Error:", err)
		return
	}

	dataMap, ok := result.(map[string]interface{})
	if !ok {
		fmt.Println("Invalid JSON structure")
		return
	}

	title, titleExists := dataMap["title"].(string)

	if titleExists {
		fmt.Println("Title:", title)
	}
}