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package com.scudata.server.odbc;import java.io.File;import java.io.InputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.transform.Result;import javax.xml.transform.stream.StreamResult;import org.w3c.dom.Document;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import org.xml.sax.SAXException;import com.scudata.app.config.ConfigConsts;import com.scudata.app.config.ConfigWriter;import com.scudata.common.Logger;import com.scudata.common.StringUtils;import com.scudata.common.Logger.FileHandler;import com.scudata.parallel.UnitClient;import com.scudata.parallel.UnitContext;import com.scudata.parallel.XmlUtil;import com.scudata.resources.ParallelMessage;import com.scudata.server.ConnectionProxyManager;import com.scudata.server.unit.UnitServer;/** * ODBC������������ */public class OdbcContext extends ConfigWriter {	public static final String ODBC_CONFIG_FILE = "OdbcServer.xml";	private String host = UnitContext.getDefaultHost();//"127.0.0.1";	private int port = 8501, timeOut = 2; // ��ʱ�ļ����ʱ�䣬СʱΪ��λ��0Ϊ����鳬ʱ	// Connection	private int conMax = 10;	private int conTimeOut = 2;// ���Ӵ��ʱ�䣬СʱΪ��λ��0Ϊ����鳬ʱ	private int conPeriod = 5; // �����������ʱ�ļ����ڵ�ʱ������0Ϊ�������ڡ��ļ��Լ��α����Ĺ���ʱ��,��λ��	private boolean autoStart=false;		private List<User> users = null;	/**	 * ����odbc������������	 */	public OdbcContext(){		try {			InputStream inputStream = UnitContext.getUnitInputStream(ODBC_CONFIG_FILE);			if (inputStream != null) {				load(inputStream);			}		}catch (Exception x) {			x.printStackTrace();		}	}	/**	 * ��������	 * @param is �����ļ�������	 * @throws Exception	 */	public void load(InputStream is) throws Exception {		DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory				.newInstance();		// BUG: CWE-611: Improper Restriction of XML External Entity Reference// DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();// FIXED: 		Document xmlDocument = docBuilder.parse(is);		NodeList nl = xmlDocument.getChildNodes();		Node root = null;		for (int i = 0; i < nl.getLength(); i++) {			Node n = nl.item(i);			if (n.getNodeName().equalsIgnoreCase("Server")) {				root = n;			}		}		if (root == null) {			throw new Exception(ParallelMessage.get().getMessage("UnitConfig.errorxml"));		}		// Server ����		String buf = XmlUtil.getAttribute(root, "host");		if (StringUtils.isValidString(buf)) {			host = buf;		}		buf = XmlUtil.getAttribute(root, "port");		if (StringUtils.isValidString(buf)) {			port = Integer.parseInt(buf);		}		buf = XmlUtil.getAttribute(root, "autostart");		if (StringUtils.isValidString(buf)) {			autoStart = Boolean.parseBoolean(buf);		}		// �̶������־������̨�� �� start.home/nodes/[ip_port]/log Ŀ¼��		String home = UnitServer.getHome();		String file = "odbc/" + UnitClient.getHostPath(host) + "_" + port + "/log/log.txt";		File f = new File(home, file);		File fp = f.getParentFile();		if (!fp.exists()) {			fp.mkdirs();		}		String logFile = f.getAbsolutePath();		FileHandler lfh = Logger.newFileHandler(logFile);		Logger.addFileHandler(lfh);				buf = XmlUtil.getAttribute(root, "timeout");		if (StringUtils.isValidString(buf)) {			timeOut = Integer.parseInt(buf);		}		Node conNode = XmlUtil.findSonNode(root, "Connection");		Node subNode = XmlUtil.findSonNode(conNode, "Max");		buf = XmlUtil.getNodeValue(subNode);		if (StringUtils.isValidString(buf)) {			int t = Integer.parseInt(buf);			if (t > 0)				conMax = t;		}		subNode = XmlUtil.findSonNode(conNode, "Timeout");		buf = XmlUtil.getNodeValue(subNode);		if (StringUtils.isValidString(buf)) {			int t = Integer.parseInt(buf);			if (t > 0)				conTimeOut = t;		}		subNode = XmlUtil.findSonNode(conNode, "Period");		buf = XmlUtil.getNodeValue(subNode);		if (StringUtils.isValidString(buf)) {			int t = Integer.parseInt(buf);			if (t > 0)				conPeriod = t;		}		Node usersNode = XmlUtil.findSonNode(root, "Users");		NodeList userList = usersNode.getChildNodes();		users = new ArrayList<User>();		for (int i = 0, size = userList.getLength(); i < size; i++) {			Node xmlNode = userList.item(i);			if (!(xmlNode.getNodeName().equalsIgnoreCase("User")))				continue;			User user = new User();			buf = XmlUtil.getAttribute(xmlNode, "name");			user.name = buf;			buf = XmlUtil.getAttribute(xmlNode, "password");			user.password = buf;			buf = XmlUtil.getAttribute(xmlNode, "admin");			if (StringUtils.isValidString(buf)) {				user.admin = Boolean.parseBoolean(buf);			}			users.add(user);		}	}	/**	 * �������õ������	 * @param out �����	 * @throws SAXException	 */	public void save(OutputStream out) throws SAXException {		Result resultxml = new StreamResult(out);		handler.setResult(resultxml);		level = 0;		handler.startDocument();		// ���ø��ڵ�Ͱ汾		handler.startElement("", "", "Server", getAttributesImpl(new String[] {				ConfigConsts.VERSION, "1", "host", host, "port", port + "","autostart", autoStart + "",				"timeout", timeOut + ""})); 		level = 1;		startElement("Connection", null);		level = 2;		writeAttribute("Max", conMax + "");		writeAttribute("Timeout", conTimeOut + "");		writeAttribute("Period", conPeriod + "");		level = 1;		endElement("Connection");		startElement("Users", null);		if (users != null) {			for (int i = 0, size = users.size(); i < size; i++) {				level = 2;				User u = users.get(i);				startElement(						"User",						getAttributesImpl(new String[] { "name", u.name,								"password", u.password, "admin", u.admin + "" }));				endElement("User");			}			level = 1;			endElement("Users");		} else {			endEmptyElement("Users");		}		handler.endElement("", "", "Server");		// �ĵ�����,ͬ��������		handler.endDocument();	}	/**	 * ��ȡ������IP	 * @return IP��ַ	 */	public String getHost() {		return host;	}	/**	 * ��ȡ�˿ں�	 * @return �˿ں�	 */	public int getPort() {		return port;	}	public void setHost(String host) {		this.host = host;	}	/**	 * ���ö˿ں�	 * @param port �˿�	 */	public void setPort(int port) {		this.port = port;	}	/**	 * �����Ƿ��Զ�����	 * @param as �Ƿ��Զ�����	 */	public void setAutoStart(boolean as) {		this.autoStart = as;	}	/**	 * ��ȡ�������Ƿ��Զ�������	 * @return �Ƿ�������	 */	public boolean isAutoStart() {		return autoStart;	}	/**	 * ��ȡ���ӳ�ʱ��ʱ��	 * @return ��ʱʱ��	 */	public int getTimeOut() {		return timeOut;	}	/**	 * ������ʱ�ļ����ʱ�䣬СʱΪ��λ��0Ϊ����鳬ʱ	 * @param timeout ��ʱʱ��	 */	public void setTimeOut(int timeout) {		this.timeOut = timeout;	}	/**	 * ��ȡ���������Ŀ	 * @return ���������	 */	public int getConMax() {		return conMax;	}	/**	 * �������������	 * @param max ���������	 */	public void setConMax(int max) {		this.conMax = max;	}	/**	 * ��ȡ���ӳ�ʱ��ʱ��	 * @return ���ӳ�ʱ��ʱ��	 */	public int getConTimeOut() {		return conTimeOut;	}	/**	 * �������Ӵ��ʱ�䣬СʱΪ��λ��0Ϊ����鳬ʱ	 * @param cto ʱ��	 */	public void setConTimeOut(int cto) {		this.conTimeOut = cto;	}	/**	 * ��ȡ��鳬ʱ���	 * @return ��ʱ����� 	 */	public int getConPeriod() {		return this.conPeriod;	}	/**	 * ���ü����������ʱ�ļ����ڵ�ʱ������0Ϊ�������ڡ�	 * �ļ��Լ��α����Ĺ���ʱ��,��λ��	 */	public void setConPeriod(int period) {		this.conPeriod = period;	}	/**	 * ��ȡ�û��б�	 * @return �û��б�	 */	public List<User> getUserList() {		return users;	}	/**	 * �����û��б�	 * @param users �û��б�	 */	public void setUserList(List<User> users) {		this.users = users;	}	/**	 * ʵ��toString�ӿ�	 */	public String toString() {		return host + ":" + port;	}	/**	 * ����û��Ƿ����	 * @param user �û���	 * @return  ����ʱ����true�����򷵻�false	 */	public boolean isUserExist(String user) {		if (users == null) {			return true;		}		for (User u : users) {			if (u.getName().equalsIgnoreCase(user))				return true;		}		return false;	}	/**	 * У���û��Ϸ���	 * @param user �û���	 * @param password ����	 * @return У��ͨ������true�����򷵻�false	 * @throws Exception	 */	public boolean checkUser(String user, String password) throws Exception{		ConnectionProxyManager cpm = ConnectionProxyManager.getInstance(); 		if(cpm.size()>=conMax){			throw new Exception("Exceed server's max connections, login user:"+user);		}		int size = users.size();		for (int i = 0; i < size; i++) {			User u = users.get(i);			if (u.getName().equalsIgnoreCase(user)) {				if (u.getPassword().equals(password)) {					return true;				} else {					throw new Exception("Invalid password.");				}			}		}		throw new Exception("Invalid user name.");	}	// ����1��ʾ��ȷ����������	public static class User {		private String name = null;		private String password = null;		private boolean admin = false;		public User() {		}		public String getName() {			return name;		}		public void setName(String name) {			this.name = name;		}		public String getPassword() {			return password;		}		public void setPassword(String password) {			this.password = password;		}		public boolean isAdmin() {			return admin;		}		public void setAdmin(boolean admin) {			this.admin = admin;		}	}}