router-for-me/CLIProxyAPI · error

invalid callback URL

Error message

invalid callback URL

What it means

Error "invalid callback URL" thrown in router-for-me/CLIProxyAPI.

Source

Thrown at internal/misc/oauth.go:67

// ParseOAuthCallback extracts OAuth parameters from a callback URL.
// It returns nil when the input is empty.
func ParseOAuthCallback(input string) (*OAuthCallback, error) {
	trimmed := strings.TrimSpace(input)
	if trimmed == "" {
		return nil, nil
	}

	candidate := trimmed
	if !strings.Contains(candidate, "://") {
		if strings.HasPrefix(candidate, "?") {
			candidate = "http://localhost" + candidate
		} else if strings.ContainsAny(candidate, "/?#") || strings.Contains(candidate, ":") {
			candidate = "http://" + candidate
		} else if strings.Contains(candidate, "=") {
			candidate = "http://localhost/?" + candidate
		} else {
			return nil, fmt.Errorf("invalid callback URL")
		}
	}

	parsedURL, err := url.Parse(candidate)
	if err != nil {
		return nil, err
	}

	query := parsedURL.Query()
	code := strings.TrimSpace(query.Get("code"))
	state := strings.TrimSpace(query.Get("state"))
	errCode := strings.TrimSpace(query.Get("error"))
	errDesc := strings.TrimSpace(query.Get("error_description"))

	if parsedURL.Fragment != "" {
		if fragQuery, errFrag := url.ParseQuery(parsedURL.Fragment); errFrag == nil {
			if code == "" {
				code = strings.TrimSpace(fragQuery.Get("code"))

View on GitHub (pinned to 78f0c4079e)

Solutions

1. Provide a well-formed absolute OAuth callback URL.
2. Verify the callback URL scheme and host in the configuration.

When it happens

Trigger: Thrown at internal/misc/oauth.go:67 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of router-for-me/CLIProxyAPI@78f0c4079e (2026-08-15). Data as JSON: /api/errors/9b6ed790bb48c473. Report an issue: GitHub.