private Map read(InputStream is) {
        Map map = new HashMap();
        try {
            Document d = DocumentBuilderFactory.newInstance()
                    .newDocumentBuilder().parse(is);

            Element root = d.getDocumentElement();
            NodeList nList = root.getElementsByTagName("client");
            String name, value = null;
            for (int i = 0; i < nList.getLength(); i++) {
                NodeList nList2 = nList.item(i).getChildNodes();
                for (int j = 0; j < nList2.getLength(); j++) {
                    name = nList2.item(j).getNodeName();// /nList2:port,location,ip
                    if (!name.equals("#text")) {
                        if (d.getElementsByTagName(name).item(i)
                                .getFirstChild() != null) {
                            value = d.getElementsByTagName(name).item(i)
                                    .getFirstChild().getNodeValue();
                        } else {
                            value = "";
                        }
                        map.put(name, value);
                    }
                }
            }
        } catch (Exception e) {

        }
        return map;
    }