データ構造を定義せずにGoでリクエスト本文からJSONを読み取る方法は?

<code class="go">// Capture the body bytes
bodyBytes, _ := ioutil.ReadAll(context.Request().Body)

// Restore the response body
context.Request().Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes))

// Decode the JSON
var v interface{}
err := json.NewDecoder(context.Request().Body).Decode(&v)
if err != nil {
    return result, err
}</code>

<code class="go">func myHandler(c echo.Context) error {
    // Capture the body bytes
    bodyBytes, _ := ioutil.ReadAll(c.Request().Body)

    // Restore the response body
    c.Request().Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes))

    // Decode the JSON
    var payload map[string]interface{}
    err := json.NewDecoder(c.Request().Body).Decode(&payload)
    if err != nil {
        return c.JSON(http.StatusBadRequest, "Invalid JSON provided")
    }

    // Use the decoded payload
    return c.JSON(http.StatusOK, payload)
}</code>