chenhg5/cc-connect · error

empty URL

Error message

empty URL

What it means

Validation guard in downloadSlackFile: the private file URL argument is empty, so there is nothing to fetch; callers must extract a url_private field from the Slack file object before downloading.

Source

Thrown at platform/slack/slack.go:564

	_, err := p.client.UploadFileV2Context(ctx, slack.UploadFileV2Parameters{
		Reader:          bytes.NewReader(file.Data),
		FileSize:        len(file.Data),
		Filename:        name,
		Channel:         rc.channel,
		ThreadTimestamp: rc.timestamp,
	})
	if err != nil {
		return fmt.Errorf("slack: send file: %w", err)
	}
	return nil
}

var _ core.FileSender = (*Platform)(nil)

func (p *Platform) downloadSlackFile(url string) ([]byte, error) {
	if url == "" {
		return nil, fmt.Errorf("empty URL")
	}
	req, _ := http.NewRequest("GET", url, nil)
	req.Header.Set("Authorization", "Bearer "+p.botToken)
	resp, err := core.HTTPClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("%s", core.RedactToken(err.Error(), p.botToken))
	}
	defer resp.Body.Close()

	// Check if we got an unexpected status code (e.g., redirect to login page)
	if resp.StatusCode != http.StatusOK {
		body, _ := io.ReadAll(io.LimitReader(resp.Body, 1024))
		return nil, fmt.Errorf("download failed with status %d: %s", resp.StatusCode, string(body))
	}

	data, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("read response body: %w", err)

View on GitHub (pinned to 4000b2338a)

Solutions

1. Check the file share event fields (url_private_download)
2. Skip attachment processing when no URL is present

When it happens

Trigger: Thrown at platform/slack/slack.go:564 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of chenhg5/cc-connect@4000b2338a (2026-09-06). Data as JSON: /api/errors/0cc89c8222e197ee. Report an issue: GitHub.