AlistGo/alist · error

need img validate code: <img src="data:image/png;base64,%s"/

Error message

need img validate code: <img src="data:image/png;base64,%s"/>

What it means

Error "need img validate code: <img src="data:image/png;base64,%s"/>" thrown in AlistGo/alist.

Source

Thrown at drivers/189pc/utils.go:453

	if err != nil {
		return fmt.Errorf("failed to obtain verification code")
	}
	if imgRes.Size() > 20 {
		if setting.GetStr(conf.OcrApi) != "" && !y.NoUseOcr {
			vRes, err := base.RestyClient.R().
				SetMultipartField("image", "validateCode.png", "image/png", bytes.NewReader(imgRes.Body())).
				Post(setting.GetStr(conf.OcrApi))
			if err != nil {
				return err
			}
			if jsoniter.Get(vRes.Body(), "status").ToInt() == 200 {
				y.VCode = jsoniter.Get(vRes.Body(), "result").ToString()
				return nil
			}
		}

		// 返回验证码图片给前端
		return fmt.Errorf(`need img validate code: <img src="data:image/png;base64,%s"/>`, base64.StdEncoding.EncodeToString(imgRes.Body()))
	}
	return nil
}

// 刷新会话
func (y *Cloud189PC) refreshSession() (err error) {
	if y.ref != nil {
		return y.ref.refreshSession()
	}
	var erron RespErr
	var userSessionResp UserSessionResp
	_, err = y.client.R().
		SetResult(&userSessionResp).SetError(&erron).
		SetQueryParams(clientSuffix()).
		SetQueryParams(map[string]string{
			"appId":       APP_ID,
			"accessToken": y.tokenInfo.AccessToken,
		}).

View on GitHub (pinned to 843d9dc814)

Solutions

1. Complete the required verification (captcha/SMS/image code) as prompted, then retry the login or operation.

When it happens

Trigger: Thrown at drivers/189pc/utils.go:453 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of AlistGo/alist@843d9dc814 (2026-08-15). Data as JSON: /api/errors/7115b4e8fdf0e857. Report an issue: GitHub.