Function getTokenCached

backend/plugin/webhook/dingtalk/app.go:228–249

(ctx context.Context, c *http.Client, id, secret string)

var tokenCacheLock sync.Mutex

func getTokenCached(ctx context.Context, c *http.Client, id, secret string) (string, error) {
	tokenCacheLock.Lock()
	defer tokenCacheLock.Unlock()

	key := tokenKey{
		id:     id,
		secret: secret,
	}

	token, ok := tokenCache.Get(key)
	if ok && time.Now().Before(token.expireAt.Add(-time.Minute)) {
		return token.token, nil
	}

	token, err := getToken(ctx, c, id, secret)
	if err != nil {
		return "", err
	}
	tokenCache.Add(key, token)

	return token.token, nil
}

// https://open.dingtalk.com/document/orgapp/obtain-the-access_token-of-an-internal-app
func getToken(ctx context.Context, c *http.Client, id, secret string) (*tokenValue, error) {