Function resolve_ws_url

src/browser.rs:9–25

Resolve the WebSocket URL for connecting to Chrome. Priority: 1. Explicit --ws-endpoint 2. Auto-connect via DevToolsActivePort (default)

(
    ws_endpoint: Option<&str>,
    user_data_dir: Option<&str>,
    channel: &str,
)

/// 1. Explicit --ws-endpoint
/// 2. Auto-connect via DevToolsActivePort (default)
pub fn resolve_ws_url(
    ws_endpoint: Option<&str>,
    user_data_dir: Option<&str>,
    channel: &str,
) -> Result<String> {
    if let Some(ws) = ws_endpoint {
        return Ok(ws.to_string());
    }

    // Auto-connect: read DevToolsActivePort from Chrome's user data directory
    let data_dir = match user_data_dir {
        Some(dir) => PathBuf::from(dir),
        None => default_chrome_user_data_dir(channel)?,
    };

    read_devtools_active_port(&data_dir)
}

/// Read DevToolsActivePort file and construct the WebSocket URL.
fn read_devtools_active_port(user_data_dir: &Path) -> Result<String> {