AlistGo/alist · error

baidu youth sk is empty

Error message

baidu youth sk is empty

What it means

Returned by BaiduYouth.getCurrentUserSK (drivers/baidu_youth/util.go:326): both the live getUserSK call and the cached d.sk came back empty (and getUserSK itself reported no error). The sk is the secret key used to compute the rand signature for locatedownload; an empty sk means downloads cannot be signed.

Source

Thrown at drivers/baidu_youth/util.go:326

	}
}

func nextDPLogID() string {
	return strconv.FormatInt(time.Now().UnixNano(), 10)
}

func (d *BaiduYouth) getCurrentUserSK(ctx context.Context) (string, error) {
	sk, err := d.getUserSK(ctx)
	if err == nil && sk != "" {
		return sk, nil
	}
	if d.sk != "" {
		return d.sk, nil
	}
	if err != nil {
		return "", err
	}
	return "", fmt.Errorf("baidu youth sk is empty")
}

func (d *BaiduYouth) locatedownloadRand(sk string, nowMilli int64) string {
	sum := sha1.Sum([]byte(strconv.FormatInt(d.uk, 10) + sk + strconv.FormatInt(nowMilli, 10) + "0"))
	return hex.EncodeToString(sum[:])
}

func (d *BaiduYouth) locatedownloadSign(fileMD5 string, fileID string, nowMilli int64) string {
	sum := md5.Sum([]byte(fileMD5 + "_" + strconv.FormatInt(d.uk, 10) + "_" + fileID + "_" + strconv.FormatInt(nowMilli, 10)))
	return hex.EncodeToString(sum[:])
}

func (d *BaiduYouth) resolveDownloadMeta(ctx context.Context, file model.Obj) (string, string, string, error) {
	parentDir := stdpath.Dir(file.GetPath())
	if parentDir == "." {
		parentDir = "/"
	}

View on GitHub (pinned to 843d9dc814)

Solutions

1. Re-init the storage with fresh cookies so the sk fetch runs again during bootstrap
2. Verify the sk endpoint (getUserSK) actually returns content with current cookies
3. Persist/cache the sk at init time so per-download calls have a fallback

url, err := d.getLocateDownloadURL(ctx, file)
if err != nil && strings.Contains(err.Error(), "sk is empty") {
    if ierr := d.Init(ctx); ierr == nil { // re-bootstrap caches sk
        url, err = d.getLocateDownloadURL(ctx, file)
    }
}

When it happens

Trigger: getLocateDownloadURL -> getCurrentUserSK when the sk API returns an empty-but-successful response and the driver was never initialized with an sk: fresh/expired cookies or a changed API shape.

Common situations: Cookie set valid enough for listing but missing the session state that yields sk; Baidu changed the sk endpoint response; long-lived process whose sk cache never got populated.

Related errors

• failed to get bdstoken from baidu youth cookie
• failed to get uk from baidu youth cookie
• api_key is empty
• cookie is empty
• invalid auth_type

AI-assisted analysis of AlistGo/alist@843d9dc814 (2026-08-15). Data as JSON: /api/errors/3b24a25e99163ef5. Report an issue: GitHub.