willow-utils/src/main/java/com/btr/proxy/selector/pac/JavaxPacScriptParser.java
@Override
  public String evaluate(String url, String host)
      throws ProxyEvaluationException {
    try {
      StringBuilder script = new StringBuilder(this.source.getScriptContent());
      String evalMethod = " ;FindProxyForURL (\"" + url + "\",\"" + host
          + "\")";
      script.append(evalMethod);
      Object result = this.engine.eval(script.toString());
      return (String) result;
    } catch (Exception e) {
      log.log(Level.INFO, "JS evaluation error.", e);
      throw new ProxyEvaluationException("Error while executing PAC script: "
          + e.getMessage(), e);
    }

  }
@Override
  public String evaluate(String url, String host)
      throws ProxyEvaluationException {
    try {
      StringBuilder script = new StringBuilder(this.source.getScriptContent());
      String evalMethod = " ;FindProxyForURL (\"" + url + "\",\"" + host
          + "\")";
      script.append(evalMethod);
      Object result = this.engine.eval(script.toString());
      return (String) result;
    } catch (Exception e) {
      log.log(Level.INFO, "JS evaluation error.", e);
      throw new ProxyEvaluationException("Error while executing PAC script: "
          + e.getMessage(), e);
    }

  }
***********************************************************************
Evaluates the given URL and host against the PAC script.

@param url
the URL to evaluate.
@param host
the host name part of the URL.
@return the script result.
@throws ProxyEvaluationException
on execution error.
**********************************************************************