apple-music-downloader/utils/ampapi/token.go

package ampapi

import (
	"io"
	"net/http"
	"regexp"
)

func GetToken() (string, error) {
	req, err := http.NewRequest("GET", "https://beta.music.apple.com", nil)
	if err != nil {
		return "", err
	}

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

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

	regex := regexp.MustCompile(`/assets/index-legacy-[^/]+\.js`)
	indexJsUri := regex.FindString(string(body))

	req, err = http.NewRequest("GET", "https://beta.music.apple.com"+indexJsUri, nil)
	if err != nil {
		return "", err
	}

	resp, err = http.DefaultClient.Do(req)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

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

	regex = regexp.MustCompile(`eyJh([^"]*)`)
	token := regex.FindString(string(body))

	return token, nil
}