Go言語とOpenAI GPT-4 APIを活用してAIに会話をさせる方法

package main

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

type GptRequest struct {
	Model    string `json:"model"`
	Messages []struct {
		Role    string `json:"role"`
		Content string `json:"content"`
	} `json:"messages"`
}

type GptResponse struct {
	Choices []struct {
		Message struct {
			Content string `json:"content"`
		} `json:"message"`
	} `json:"choices"`
}

func main() {
	var prompt string
	fmt.Println("Enter the topic:")
	fmt.Scanln(&prompt)
	url := "https://api.openai.com/v1/chat/completions"

	payload := &GptRequest{
		Model: "gpt-4",
		Messages: []struct {
			Role    string `json:"role"`
			Content string `json:"content"`
		}{
			{
				Role:    "user",
				Content: prompt,
			},
		},
	}

	jsonPayload, err := json.Marshal(payload)
	if err != nil {
		fmt.Println("error!")
		return
	}

	// Create a new HTTP request
	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonPayload))
	if err != nil {
		fmt.Println("error!")
		return
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", "あなたのAPIキー"))

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		fmt.Println("error!")
		return
	}

	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println("error!")
		return
	}

	var gpt4Response GptResponse
	err = json.Unmarshal(body, &gpt4Response)
	if err != nil {
		fmt.Println("error!")
		return
	}
	text := gpt4Response.Choices[0].Message.Content
	fmt.Println("----------")
	fmt.Println(text)
	fmt.Println("----------")
}

go run main.go
Enter the topic:
日本の首都はどこですか？
----------
日本の首都は東京です。
----------