Un-escape JavaScript escaped value in Java

Question

In our web service we set a cookie through JavaScript wich we read again in Java (Servlet)

However we need to escape the value of the cookie because it may contain i

Answer 1

Common lang's StringEscapeUtils didn't work for me.

You can simply use javascript nashorn engine to unescape a escaped javascript string.

private String decodeJavascriptString(final String encodedString) {
    ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
    Invocable invocable = (Invocable) engine;
    String decodedString = encodedString;
    try {
        decodedString = (String) invocable.invokeFunction("unescape", encodedString);

    } catch (ScriptException e) {
        e.printStackTrace();
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    }

    return decodedString;
}