golang のJson をPostするサンプル

package main

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

func main() {
	// The URL to which you want to send the JSON data
	url := "https://example.com/api/endpoint"

	// Data to be sent as JSON in the request body
	data := map[string]interface{}{
		"key1": "value1",
		"key2": "value2",
	}

	// Convert data to JSON format
	jsonData, err := json.Marshal(data)
	if err != nil {
		fmt.Println("Error converting data to JSON:", err)
		return
	}

	// Create a new HTTP request
	request, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonData))
	if err != nil {
		fmt.Println("Error creating request:", err)
		return
	}

	// Set the request header to indicate JSON data
	request.Header.Set("Content-Type", "application/json")

	// Create an HTTP client and send the request
	client := &http.Client{}
	response, err := client.Do(request)
	if err != nil {
		fmt.Println("Error sending request:", err)
		return
	}
	defer response.Body.Close()

	// Check the response status code
	if response.StatusCode != http.StatusOK {
		fmt.Println("Unexpected response status code:", response.StatusCode)
		return
	}

	// Read the response body
	var responseData map[string]interface{}
	err = json.NewDecoder(response.Body).Decode(&responseData)
	if err != nil {
		fmt.Println("Error decoding response:", err)
		return
	}

	// Process the response data as needed
	fmt.Println("Response:", responseData)
}