[TD-1859]<feature>: a JDBC implementation use TDengine Restful Interface

src/connector/jdbc/pom.xml

@@ -56,6 +56,23 @@
             <scope>test</scope>
         </dependency>
 
+        <!-- for restful -->
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpclient</artifactId>
+            <version>4.5.8</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.9</version>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>1.2.58</version>
+        </dependency>
+
     </dependencies>
     <build>
         <plugins>

src/connector/jdbc/src/main/java/com/taosdata/jdbc/AbstractTaosDriver.java

+package com.taosdata.jdbc;
+
+import java.io.*;
+import java.sql.Driver;
+import java.sql.DriverPropertyInfo;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+import java.util.StringTokenizer;
+
+public abstract class AbstractTaosDriver implements Driver {
+
+    private static final String TAOS_CFG_FILENAME = "taos.cfg";
+
+    /**
+     * @param cfgDirPath
+     * @return return the config dir
+     **/
+    protected File loadConfigDir(String cfgDirPath) {
+        if (cfgDirPath == null)
+            return loadDefaultConfigDir();
+        File cfgDir = new File(cfgDirPath);
+        if (!cfgDir.exists())
+            return loadDefaultConfigDir();
+        return cfgDir;
+    }
+
+    /**
+     * @return search the default config dir, if the config dir is not exist will return null
+     */
+    protected File loadDefaultConfigDir() {
+        File cfgDir;
+        File cfgDir_linux = new File("/etc/taos");
+        cfgDir = cfgDir_linux.exists() ? cfgDir_linux : null;
+        File cfgDir_windows = new File("C:\\TDengine\\cfg");
+        cfgDir = (cfgDir == null && cfgDir_windows.exists()) ? cfgDir_windows : cfgDir;
+        return cfgDir;
+    }
+
+    protected List<String> loadConfigEndpoints(File cfgFile) {
+        List<String> endpoints = new ArrayList<>();
+        try (BufferedReader reader = new BufferedReader(new FileReader(cfgFile))) {
+            String line = null;
+            while ((line = reader.readLine()) != null) {
+                if (line.trim().startsWith("firstEp") || line.trim().startsWith("secondEp")) {
+                    endpoints.add(line.substring(line.indexOf('p') + 1).trim());
+                }
+                if (endpoints.size() > 1)
+                    break;
+            }
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return endpoints;
+    }
+
+    protected void loadTaosConfig(Properties info) {
+        if ((info.getProperty(TSDBDriver.PROPERTY_KEY_HOST) == null ||
+                info.getProperty(TSDBDriver.PROPERTY_KEY_HOST).isEmpty()) && (
+                info.getProperty(TSDBDriver.PROPERTY_KEY_PORT) == null ||
+                        info.getProperty(TSDBDriver.PROPERTY_KEY_PORT).isEmpty())) {
+            File cfgDir = loadConfigDir(info.getProperty(TSDBDriver.PROPERTY_KEY_CONFIG_DIR));
+            File cfgFile = cfgDir.listFiles((dir, name) -> TAOS_CFG_FILENAME.equalsIgnoreCase(name))[0];
+            List<String> endpoints = loadConfigEndpoints(cfgFile);
+            if (!endpoints.isEmpty()) {
+                info.setProperty(TSDBDriver.PROPERTY_KEY_HOST, endpoints.get(0).split(":")[0]);
+                info.setProperty(TSDBDriver.PROPERTY_KEY_PORT, endpoints.get(0).split(":")[1]);
+            }
+        }
+    }
+
+    protected DriverPropertyInfo[] getPropertyInfo(Properties info) {
+        DriverPropertyInfo hostProp = new DriverPropertyInfo(TSDBDriver.PROPERTY_KEY_HOST, info.getProperty(TSDBDriver.PROPERTY_KEY_HOST));
+        hostProp.required = false;
+        hostProp.description = "Hostname";
+
+        DriverPropertyInfo portProp = new DriverPropertyInfo(TSDBDriver.PROPERTY_KEY_PORT, info.getProperty(TSDBDriver.PROPERTY_KEY_PORT, TSDBConstants.DEFAULT_PORT));
+        portProp.required = false;
+        portProp.description = "Port";
+
+        DriverPropertyInfo dbProp = new DriverPropertyInfo(TSDBDriver.PROPERTY_KEY_DBNAME, info.getProperty(TSDBDriver.PROPERTY_KEY_DBNAME));
+        dbProp.required = false;
+        dbProp.description = "Database name";
+
+        DriverPropertyInfo userProp = new DriverPropertyInfo(TSDBDriver.PROPERTY_KEY_USER, info.getProperty(TSDBDriver.PROPERTY_KEY_USER));
+        userProp.required = true;
+        userProp.description = "User";
+
+        DriverPropertyInfo passwordProp = new DriverPropertyInfo(TSDBDriver.PROPERTY_KEY_PASSWORD, info.getProperty(TSDBDriver.PROPERTY_KEY_PASSWORD));
+        passwordProp.required = true;
+        passwordProp.description = "Password";
+
+        DriverPropertyInfo[] propertyInfo = new DriverPropertyInfo[5];
+        propertyInfo[0] = hostProp;
+        propertyInfo[1] = portProp;
+        propertyInfo[2] = dbProp;
+        propertyInfo[3] = userProp;
+        propertyInfo[4] = passwordProp;
+        return propertyInfo;
+    }
+
+    protected Properties parseURL(String url, Properties defaults) {
+        Properties urlProps = (defaults != null) ? defaults : new Properties();
+
+        // parse properties
+        int beginningOfSlashes = url.indexOf("//");
+        int index = url.indexOf("?");
+        if (index != -1) {
+            String paramString = url.substring(index + 1, url.length());
+            url = url.substring(0, index);
+            StringTokenizer queryParams = new StringTokenizer(paramString, "&");
+            while (queryParams.hasMoreElements()) {
+                String parameterValuePair = queryParams.nextToken();
+                int indexOfEqual = parameterValuePair.indexOf("=");
+                String parameter = null;
+                String value = null;
+                if (indexOfEqual != -1) {
+                    parameter = parameterValuePair.substring(0, indexOfEqual);
+                    if (indexOfEqual + 1 < parameterValuePair.length()) {
+                        value = parameterValuePair.substring(indexOfEqual + 1);
+                    }
+                }
+                if ((value != null && value.length() > 0) && (parameter != null && parameter.length() > 0)) {
+                    urlProps.setProperty(parameter, value);
+                }
+            }
+        }
+
+        // parse Product Name
+        String dbProductName = url.substring(0, beginningOfSlashes);
+        dbProductName = dbProductName.substring(dbProductName.indexOf(":") + 1);
+        dbProductName = dbProductName.substring(0, dbProductName.indexOf(":"));
+        // parse dbname
+        url = url.substring(beginningOfSlashes + 2);
+        int indexOfSlash = url.indexOf("/");
+        if (indexOfSlash != -1) {
+            if (indexOfSlash + 1 < url.length()) {
+                urlProps.setProperty(TSDBDriver.PROPERTY_KEY_DBNAME, url.substring(indexOfSlash + 1));
+            }
+            url = url.substring(0, indexOfSlash);
+        }
+        // parse port
+        int indexOfColon = url.indexOf(":");
+        if (indexOfColon != -1) {
+            if (indexOfColon + 1 < url.length()) {
+                urlProps.setProperty(TSDBDriver.PROPERTY_KEY_PORT, url.substring(indexOfColon + 1));
+            }
+            url = url.substring(0, indexOfColon);
+        }
+        // parse host
+        if (url != null && url.length() > 0 && url.trim().length() > 0) {
+            urlProps.setProperty(TSDBDriver.PROPERTY_KEY_HOST, url);
+        }
+        return urlProps;
+    }
+
+
+
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBDriver.java

@@ -14,7 +14,6 @@
  *****************************************************************************/
 package com.taosdata.jdbc;
 
-import java.io.*;
 import java.sql.*;
 import java.util.*;
 import java.util.logging.Logger;
@@ -38,7 +37,7 @@ import java.util.logging.Logger;
  * register it with the DriverManager. This means that a user can load and
  * register a driver by doing Class.forName("foo.bah.Driver")
  */
-public class TSDBDriver implements java.sql.Driver {
+public class TSDBDriver extends AbstractTaosDriver {
 
     @Deprecated
     private static final String URL_PREFIX1 = "jdbc:TSDB://";
@@ -97,50 +96,6 @@ public class TSDBDriver implements java.sql.Driver {
         }
     }
 
-    private List<String> loadConfigEndpoints(File cfgFile) {
-        List<String> endpoints = new ArrayList<>();
-        try (BufferedReader reader = new BufferedReader(new FileReader(cfgFile))) {
-            String line = null;
-            while ((line = reader.readLine()) != null) {
-                if (line.trim().startsWith("firstEp") || line.trim().startsWith("secondEp")) {
-                    endpoints.add(line.substring(line.indexOf('p') + 1).trim());
-                }
-                if (endpoints.size() > 1)
-                    break;
-            }
-        } catch (FileNotFoundException e) {
-            e.printStackTrace();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        return endpoints;
-    }
-
-    /**
-     * @param cfgDirPath
-     * @return return the config dir
-     **/
-    private File loadConfigDir(String cfgDirPath) {
-        if (cfgDirPath == null)
-            return loadDefaultConfigDir();
-        File cfgDir = new File(cfgDirPath);
-        if (!cfgDir.exists())
-            return loadDefaultConfigDir();
-        return cfgDir;
-    }
-
-    /**
-     * @return search the default config dir, if the config dir is not exist will return null
-     */
-    private File loadDefaultConfigDir() {
-        File cfgDir;
-        File cfgDir_linux = new File("/etc/taos");
-        cfgDir = cfgDir_linux.exists() ? cfgDir_linux : null;
-        File cfgDir_windows = new File("C:\\TDengine\\cfg");
-        cfgDir = (cfgDir == null && cfgDir_windows.exists()) ? cfgDir_windows : cfgDir;
-        return cfgDir;
-    }
-
     public Connection connect(String url, Properties info) throws SQLException {
         if (url == null)
             throw new SQLException(TSDBConstants.WrapErrMsg("url is not set!"));
@@ -152,26 +107,12 @@ public class TSDBDriver implements java.sql.Driver {
         if ((props = parseURL(url, info)) == null) {
             return null;
         }
-
         //load taos.cfg start
-        if ((info.getProperty(TSDBDriver.PROPERTY_KEY_HOST) == null ||
-                info.getProperty(TSDBDriver.PROPERTY_KEY_HOST).isEmpty()) && (
-                info.getProperty(TSDBDriver.PROPERTY_KEY_PORT) == null ||
-                        info.getProperty(TSDBDriver.PROPERTY_KEY_PORT).isEmpty())) {
-            File cfgDir = loadConfigDir(info.getProperty(TSDBDriver.PROPERTY_KEY_CONFIG_DIR));
-            File cfgFile = cfgDir.listFiles((dir, name) -> "taos.cfg".equalsIgnoreCase(name))[0];
-            List<String> endpoints = loadConfigEndpoints(cfgFile);
-            if (!endpoints.isEmpty()) {
-                info.setProperty(TSDBDriver.PROPERTY_KEY_HOST, endpoints.get(0).split(":")[0]);
-                info.setProperty(TSDBDriver.PROPERTY_KEY_PORT, endpoints.get(0).split(":")[1]);
-            }
-        }
+        loadTaosConfig(info);
 
         try {
-            TSDBJNIConnector.init((String) props.get(PROPERTY_KEY_CONFIG_DIR),
-                    (String) props.get(PROPERTY_KEY_LOCALE),
-                    (String) props.get(PROPERTY_KEY_CHARSET),
-                    (String) props.get(PROPERTY_KEY_TIME_ZONE));
+            TSDBJNIConnector.init((String) props.get(PROPERTY_KEY_CONFIG_DIR), (String) props.get(PROPERTY_KEY_LOCALE),
+                    (String) props.get(PROPERTY_KEY_CHARSET), (String) props.get(PROPERTY_KEY_TIME_ZONE));
             Connection newConn = new TSDBConnection(props, this.dbMetaData);
             return newConn;
         } catch (SQLWarning sqlWarning) {
@@ -208,39 +149,13 @@ public class TSDBDriver implements java.sql.Driver {
             info = parseURL(url, info);
         }
 
-        DriverPropertyInfo hostProp = new DriverPropertyInfo(PROPERTY_KEY_HOST, info.getProperty(PROPERTY_KEY_HOST));
-        hostProp.required = false;
-        hostProp.description = "Hostname";
-
-        DriverPropertyInfo portProp = new DriverPropertyInfo(PROPERTY_KEY_PORT, info.getProperty(PROPERTY_KEY_PORT, TSDBConstants.DEFAULT_PORT));
-        portProp.required = false;
-        portProp.description = "Port";
-
-        DriverPropertyInfo dbProp = new DriverPropertyInfo(PROPERTY_KEY_DBNAME, info.getProperty(PROPERTY_KEY_DBNAME));
-        dbProp.required = false;
-        dbProp.description = "Database name";
-
-        DriverPropertyInfo userProp = new DriverPropertyInfo(PROPERTY_KEY_USER, info.getProperty(PROPERTY_KEY_USER));
-        userProp.required = true;
-        userProp.description = "User";
-
-        DriverPropertyInfo passwordProp = new DriverPropertyInfo(PROPERTY_KEY_PASSWORD, info.getProperty(PROPERTY_KEY_PASSWORD));
-        passwordProp.required = true;
-        passwordProp.description = "Password";
-
-        DriverPropertyInfo[] propertyInfo = new DriverPropertyInfo[5];
-        propertyInfo[0] = hostProp;
-        propertyInfo[1] = portProp;
-        propertyInfo[2] = dbProp;
-        propertyInfo[3] = userProp;
-        propertyInfo[4] = passwordProp;
-
-        return propertyInfo;
+        return getPropertyInfo(info);
     }
 
     /**
      * example: jdbc:TAOS://127.0.0.1:0/db?user=root&password=your_password
      */
+    @Override
     public Properties parseURL(String url, Properties defaults) {
         Properties urlProps = (defaults != null) ? defaults : new Properties();
         if (url == null || url.length() <= 0 || url.trim().length() <= 0)
@@ -296,86 +211,10 @@ public class TSDBDriver implements java.sql.Driver {
         if (url != null && url.length() > 0 && url.trim().length() > 0) {
             urlProps.setProperty(TSDBDriver.PROPERTY_KEY_HOST, url);
         }
-
         this.dbMetaData = new TSDBDatabaseMetaData(dbProductName, urlForMeta, urlProps.getProperty(TSDBDriver.PROPERTY_KEY_USER));
-
-        /*
-        String urlForMeta = url;
-        String dbProductName = url.substring(url.indexOf(":") + 1);
-        dbProductName = dbProductName.substring(0, dbProductName.indexOf(":"));
-        int beginningOfSlashes = url.indexOf("//");
-        url = url.substring(beginningOfSlashes + 2);
-
-        String host = url.substring(0, url.indexOf(":"));
-        url = url.substring(url.indexOf(":") + 1);
-        urlProps.setProperty(PROPERTY_KEY_HOST, host);
-
-        String port = url.substring(0, url.indexOf("/"));
-        urlProps.setProperty(PROPERTY_KEY_PORT, port);
-        url = url.substring(url.indexOf("/") + 1);
-
-        if (url.indexOf("?") != -1) {
-            String dbName = url.substring(0, url.indexOf("?"));
-            urlProps.setProperty(PROPERTY_KEY_DBNAME, dbName);
-            url = url.trim().substring(url.indexOf("?") + 1);
-        } else {
-            // without user & password so return
-            if (!url.trim().isEmpty()) {
-                String dbName = url.trim();
-                urlProps.setProperty(PROPERTY_KEY_DBNAME, dbName);
-            }
-            this.dbMetaData = new TSDBDatabaseMetaData(dbProductName, urlForMeta, urlProps.getProperty("user"));
-            return urlProps;
-        }
-
-        String user = "";
-
-        if (url.indexOf("&") == -1) {
-            String[] kvPair = url.trim().split("=");
-            if (kvPair.length == 2) {
-                setPropertyValue(urlProps, kvPair);
-                return urlProps;
-            }
-        }
-
-        String[] queryStrings = url.trim().split("&");
-        for (String queryStr : queryStrings) {
-            String[] kvPair = queryStr.trim().split("=");
-            if (kvPair.length < 2) {
-                continue;
-            }
-            setPropertyValue(urlProps, kvPair);
-        }
-
-        user = urlProps.getProperty(PROPERTY_KEY_USER).toString();
-        this.dbMetaData = new TSDBDatabaseMetaData(dbProductName, urlForMeta, user);
-*/
         return urlProps;
     }
 
-    private void setPropertyValue(Properties property, String[] keyValuePair) {
-        switch (keyValuePair[0].toLowerCase()) {
-            case PROPERTY_KEY_USER:
-                property.setProperty(PROPERTY_KEY_USER, keyValuePair[1]);
-                break;
-            case PROPERTY_KEY_PASSWORD:
-                property.setProperty(PROPERTY_KEY_PASSWORD, keyValuePair[1]);
-                break;
-            case PROPERTY_KEY_TIME_ZONE:
-                property.setProperty(PROPERTY_KEY_TIME_ZONE, keyValuePair[1]);
-                break;
-            case PROPERTY_KEY_LOCALE:
-                property.setProperty(PROPERTY_KEY_LOCALE, keyValuePair[1]);
-                break;
-            case PROPERTY_KEY_CHARSET:
-                property.setProperty(PROPERTY_KEY_CHARSET, keyValuePair[1]);
-                break;
-            case PROPERTY_KEY_CONFIG_DIR:
-                property.setProperty(PROPERTY_KEY_CONFIG_DIR, keyValuePair[1]);
-                break;
-        }
-    }
-
     public int getMajorVersion() {
         return 2;
     }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/TaosRestfulConnection.java

+package com.taosdata.jdbc.rs;
+
+import com.taosdata.jdbc.TSDBConstants;
+
+import java.sql.*;
+import java.util.Map;
+import java.util.Properties;
+import java.util.concurrent.Executor;
+
+public class TaosRestfulConnection implements Connection {
+
+    private final String host;
+    private final int port;
+    private final Properties props;
+    private final String database;
+    private final String url;
+
+
+    public TaosRestfulConnection(String host, String port, Properties props, String database, String url) {
+        this.host = host;
+        this.port = Integer.parseInt(port);
+        this.props = props;
+        this.database = database;
+        this.url = url;
+    }
+
+    @Override
+    public Statement createStatement() throws SQLException {
+        if (isClosed())
+            throw new SQLException(TSDBConstants.WrapErrMsg("restful TDengine connection is closed."));
+        return new TaosRestfulStatement(this, this.database);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public String nativeSQL(String sql) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void setAutoCommit(boolean autoCommit) throws SQLException {
+
+    }
+
+    @Override
+    public boolean getAutoCommit() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public void commit() throws SQLException {
+
+    }
+
+    @Override
+    public void rollback() throws SQLException {
+
+    }
+
+    @Override
+    public void close() throws SQLException {
+
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public DatabaseMetaData getMetaData() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void setReadOnly(boolean readOnly) throws SQLException {
+
+    }
+
+    @Override
+    public boolean isReadOnly() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public void setCatalog(String catalog) throws SQLException {
+
+    }
+
+    @Override
+    public String getCatalog() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void setTransactionIsolation(int level) throws SQLException {
+
+    }
+
+    @Override
+    public int getTransactionIsolation() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+
+    }
+
+    @Override
+    public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Map<String, Class<?>> getTypeMap() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
+
+    }
+
+    @Override
+    public void setHoldability(int holdability) throws SQLException {
+
+    }
+
+    @Override
+    public int getHoldability() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public Savepoint setSavepoint() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Savepoint setSavepoint(String name) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void rollback(Savepoint savepoint) throws SQLException {
+
+    }
+
+    @Override
+    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
+
+    }
+
+    @Override
+    public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Clob createClob() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Blob createBlob() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public NClob createNClob() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public SQLXML createSQLXML() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public boolean isValid(int timeout) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public void setClientInfo(String name, String value) throws SQLClientInfoException {
+
+    }
+
+    @Override
+    public void setClientInfo(Properties properties) throws SQLClientInfoException {
+
+    }
+
+    @Override
+    public String getClientInfo(String name) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Properties getClientInfo() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void setSchema(String schema) throws SQLException {
+
+    }
+
+    @Override
+    public String getSchema() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void abort(Executor executor) throws SQLException {
+
+    }
+
+    @Override
+    public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
+
+    }
+
+    @Override
+    public int getNetworkTimeout() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return false;
+    }
+
+    public String getHost() {
+        return host;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public Properties getProps() {
+        return props;
+    }
+
+    public String getDatabase() {
+        return database;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/TaosRestfulDriver.java

+package com.taosdata.jdbc.rs;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONObject;
+import com.taosdata.jdbc.AbstractTaosDriver;
+import com.taosdata.jdbc.TSDBConstants;
+import com.taosdata.jdbc.TSDBDriver;
+import com.taosdata.jdbc.rs.util.HttpClientPoolUtil;
+
+import java.sql.*;
+import java.util.Properties;
+import java.util.logging.Logger;
+
+public class TaosRestfulDriver extends AbstractTaosDriver {
+
+    private static final String URL_PREFIX = "jdbc:TAOS-RS://";
+
+    static {
+        try {
+            DriverManager.registerDriver(new TaosRestfulDriver());
+        } catch (SQLException e) {
+            throw new RuntimeException(TSDBConstants.WrapErrMsg("can not register Restful JDBC driver"), e);
+        }
+    }
+
+    @Override
+    public Connection connect(String url, Properties info) throws SQLException {
+        // throw SQLException if url is null
+        if (url == null)
+            throw new SQLException(TSDBConstants.WrapErrMsg("url is not set!"));
+        // return null if url is not be accepted
+        if (!acceptsURL(url))
+            return null;
+
+        Properties props = parseURL(url, info);
+        String host = props.getProperty(TSDBDriver.PROPERTY_KEY_HOST, "localhost");
+        String port = props.getProperty(TSDBDriver.PROPERTY_KEY_PORT, "6041");
+        String database = props.getProperty(TSDBDriver.PROPERTY_KEY_DBNAME);
+
+        String loginUrl = "http://" + props.getProperty(TSDBDriver.PROPERTY_KEY_HOST) + ":"
+                + props.getProperty(TSDBDriver.PROPERTY_KEY_PORT) + "/rest/login/"
+                + props.getProperty(TSDBDriver.PROPERTY_KEY_USER) + "/"
+                + props.getProperty(TSDBDriver.PROPERTY_KEY_PASSWORD) + "";
+        String result = HttpClientPoolUtil.execute(loginUrl);
+        JSONObject jsonResult = JSON.parseObject(result);
+        String status = jsonResult.getString("status");
+        if (!status.equals("succ")) {
+            throw new SQLException(jsonResult.getString("desc"));
+        }
+
+        return new TaosRestfulConnection(host, port, props, database, url);
+    }
+
+    @Override
+    public boolean acceptsURL(String url) throws SQLException {
+        if (url == null)
+            throw new SQLException(TSDBConstants.WrapErrMsg("url is null"));
+        return (url != null && url.length() > 0 && url.trim().length() > 0) && url.startsWith(URL_PREFIX);
+    }
+
+    @Override
+    public DriverPropertyInfo[] getPropertyInfo(String url, Properties info) throws SQLException {
+        if (info == null) {
+            info = new Properties();
+        }
+        if (acceptsURL(url)) {
+            info = parseURL(url, info);
+        }
+        return getPropertyInfo(info);
+    }
+
+    @Override
+    public int getMajorVersion() {
+        return 2;
+    }
+
+    @Override
+    public int getMinorVersion() {
+        return 0;
+    }
+
+    @Override
+    public boolean jdbcCompliant() {
+        return false;
+    }
+
+    @Override
+    public Logger getParentLogger() throws SQLFeatureNotSupportedException {
+        return null;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/TaosRestfulResultSetMetaData.java

+package com.taosdata.jdbc.rs;
+
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+import java.util.List;
+
+public class TaosRestfulResultSetMetaData implements ResultSetMetaData {
+
+    private List<String> fields;
+
+    public TaosRestfulResultSetMetaData(List<String> fields) {
+        this.fields = fields;
+    }
+
+    @Override
+    public int getColumnCount() throws SQLException {
+        return fields.size();
+    }
+
+    @Override
+    public boolean isAutoIncrement(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean isCaseSensitive(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean isSearchable(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean isCurrency(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public int isNullable(int column) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public boolean isSigned(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public int getColumnDisplaySize(int column) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public String getColumnLabel(int column) throws SQLException {
+        return fields.get(column - 1);
+    }
+
+    @Override
+    public String getColumnName(int column) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public String getSchemaName(int column) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public int getPrecision(int column) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public int getScale(int column) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public String getTableName(int column) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public String getCatalogName(int column) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public int getColumnType(int column) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public String getColumnTypeName(int column) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public boolean isReadOnly(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean isWritable(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean isDefinitelyWritable(int column) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public String getColumnClassName(int column) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return false;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/TaosRestfulStatement.java

+package com.taosdata.jdbc.rs;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONObject;
+import com.taosdata.jdbc.TSDBConstants;
+import com.taosdata.jdbc.rs.util.HttpClientPoolUtil;
+
+import java.sql.*;
+import java.util.Arrays;
+import java.util.List;
+
+public class TaosRestfulStatement implements Statement {
+
+    private final String catalog;
+    private final TaosRestfulConnection conn;
+
+    public TaosRestfulStatement(TaosRestfulConnection c, String catalog) {
+        this.conn = c;
+        this.catalog = catalog;
+    }
+
+    @Override
+    public ResultSet executeQuery(String sql) throws SQLException {
+
+        final String url = "http://" + conn.getHost() + ":"+conn.getPort()+"/rest/sql";
+
+        String result = HttpClientPoolUtil.execute(url, sql);
+        String fields = "";
+        List<String> words = Arrays.asList(sql.split(" "));
+        if (words.get(0).equalsIgnoreCase("select")) {
+            int index = 0;
+            if (words.contains("from")) {
+                index = words.indexOf("from");
+            }
+            if (words.contains("FROM")) {
+                index = words.indexOf("FROM");
+            }
+            fields = HttpClientPoolUtil.execute(url, "DESCRIBE " + words.get(index + 1));
+        }
+
+        JSONObject jsonObject = JSON.parseObject(result);
+        if (jsonObject.getString("status").equals("error")) {
+            throw new SQLException(TSDBConstants.WrapErrMsg("SQL execution error: " +
+                    jsonObject.getString("desc") + "\n" +
+                    "error code: " + jsonObject.getString("code")));
+        }
+        String dataStr = jsonObject.getString("data");
+        if ("use".equalsIgnoreCase(fields.split(" ")[0])) {
+            return new TaosRestfulResultSet(dataStr, "");
+        }
+
+        JSONObject jsonField = JSON.parseObject(fields);
+        if (jsonField == null) {
+            return new TaosRestfulResultSet(dataStr, "");
+        }
+        if (jsonField.getString("status").equals("error")) {
+            throw new SQLException(TSDBConstants.WrapErrMsg("SQL execution error: " +
+                    jsonField.getString("desc") + "\n" +
+                    "error code: " + jsonField.getString("code")));
+        }
+        String fieldData = jsonField.getString("data");
+
+        return new TaosRestfulResultSet(dataStr, fieldData);
+    }
+
+    @Override
+    public int executeUpdate(String sql) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public void close() throws SQLException {
+
+    }
+
+    @Override
+    public int getMaxFieldSize() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public void setMaxFieldSize(int max) throws SQLException {
+
+    }
+
+    @Override
+    public int getMaxRows() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public void setMaxRows(int max) throws SQLException {
+
+    }
+
+    @Override
+    public void setEscapeProcessing(boolean enable) throws SQLException {
+
+    }
+
+    @Override
+    public int getQueryTimeout() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public void setQueryTimeout(int seconds) throws SQLException {
+
+    }
+
+    @Override
+    public void cancel() throws SQLException {
+
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+
+    }
+
+    @Override
+    public void setCursorName(String name) throws SQLException {
+
+    }
+
+    @Override
+    public boolean execute(String sql) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public ResultSet getResultSet() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public int getUpdateCount() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public boolean getMoreResults() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public void setFetchDirection(int direction) throws SQLException {
+
+    }
+
+    @Override
+    public int getFetchDirection() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public void setFetchSize(int rows) throws SQLException {
+
+    }
+
+    @Override
+    public int getFetchSize() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public int getResultSetConcurrency() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public int getResultSetType() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public void addBatch(String sql) throws SQLException {
+
+    }
+
+    @Override
+    public void clearBatch() throws SQLException {
+
+    }
+
+    @Override
+    public int[] executeBatch() throws SQLException {
+        return new int[0];
+    }
+
+    @Override
+    public Connection getConnection() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public boolean getMoreResults(int current) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public ResultSet getGeneratedKeys() throws SQLException {
+        return null;
+    }
+
+    @Override
+    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public boolean execute(String sql, String[] columnNames) throws SQLException {
+        return false;
+    }
+
+    @Override
+    public int getResultSetHoldability() throws SQLException {
+        return 0;
+    }
+
+    @Override
+    public boolean isClosed() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public void setPoolable(boolean poolable) throws SQLException {
+
+    }
+
+    @Override
+    public boolean isPoolable() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public void closeOnCompletion() throws SQLException {
+
+    }
+
+    @Override
+    public boolean isCloseOnCompletion() throws SQLException {
+        return false;
+    }
+
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        return null;
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return false;
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/util/HttpClientPoolUtil.java

+package com.taosdata.jdbc.rs.util;
+
+import org.apache.commons.lang3.StringUtils;
+import org.apache.http.HeaderElement;
+import org.apache.http.HeaderElementIterator;
+import org.apache.http.HttpEntity;
+import org.apache.http.client.config.RequestConfig;
+import org.apache.http.client.methods.*;
+import org.apache.http.client.protocol.HttpClientContext;
+import org.apache.http.conn.ConnectionKeepAliveStrategy;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
+import org.apache.http.message.BasicHeaderElementIterator;
+import org.apache.http.protocol.HTTP;
+import org.apache.http.protocol.HttpContext;
+import org.apache.http.util.EntityUtils;
+
+
+public class HttpClientPoolUtil {
+    public static PoolingHttpClientConnectionManager cm = null;
+    public static CloseableHttpClient httpClient = null;
+    /**
+     * 默认content 类型
+     */
+    private static final String DEFAULT_CONTENT_TYPE = "application/json";
+    /**
+     * 默认请求超时时间30s
+     */
+    private static final int DEFAULT_TIME_OUT = 15000;
+    private static final int count = 32;
+    private static final int totalCount = 1000;
+    private static final int Http_Default_Keep_Time = 15000;
+
+    /**
+     * 初始化连接池
+     */
+    public static synchronized void initPools() {
+        if (httpClient == null) {
+            cm = new PoolingHttpClientConnectionManager();
+            cm.setDefaultMaxPerRoute(count);
+            cm.setMaxTotal(totalCount);
+            httpClient = HttpClients.custom().setKeepAliveStrategy(defaultStrategy).setConnectionManager(cm).build();
+        }
+    }
+
+    /**
+     * Http connection keepAlive 设置
+     */
+    public static ConnectionKeepAliveStrategy defaultStrategy = (response, context) -> {
+        HeaderElementIterator it = new BasicHeaderElementIterator(response.headerIterator(HTTP.CONN_KEEP_ALIVE));
+        int keepTime = Http_Default_Keep_Time * 1000;
+        while (it.hasNext()) {
+            HeaderElement headerElement = it.nextElement();
+            String param = headerElement.getName();
+            String value = headerElement.getValue();
+            if (value != null && param.equalsIgnoreCase("timeout")) {
+                try {
+                    return Long.parseLong(value) * 1000;
+                } catch (Exception e) {
+                    new Exception(
+                            "format KeepAlive timeout exception, exception:" + e.toString())
+                            .printStackTrace();
+                }
+            }
+        }
+        return keepTime;
+    };
+
+    public static CloseableHttpClient getHttpClient() {
+        return httpClient;
+    }
+
+    public static PoolingHttpClientConnectionManager getHttpConnectionManager() {
+        return cm;
+    }
+
+    /**
+     * 执行http post请求
+     * 默认采用Content-Type：application/json，Accept：application/json
+     *
+     * @param uri  请求地址
+     * @param data 请求数据
+     * @return responseBody
+     */
+    public static String execute(String uri, String data) {
+        long startTime = System.currentTimeMillis();
+        HttpEntity httpEntity = null;
+        HttpEntityEnclosingRequestBase method = null;
+        String responseBody = "";
+        try {
+            if (httpClient == null) {
+                initPools();
+            }
+            method = (HttpEntityEnclosingRequestBase) getRequest(uri, HttpPost.METHOD_NAME, DEFAULT_CONTENT_TYPE, 0);
+            method.setEntity(new StringEntity(data));
+            HttpContext context = HttpClientContext.create();
+            CloseableHttpResponse httpResponse = httpClient.execute(method, context);
+            httpEntity = httpResponse.getEntity();
+            if (httpEntity != null) {
+                responseBody = EntityUtils.toString(httpEntity, "UTF-8");
+            }
+        } catch (Exception e) {
+            if (method != null) {
+                method.abort();
+            }
+//            e.printStackTrace();
+//            logger.error("execute post request exception, url:" + uri + ", exception:" + e.toString()
+//                    + ", cost time(ms):" + (System.currentTimeMillis() - startTime));
+            new Exception("execute post request exception, url:"
+                    + uri + ", exception:" + e.toString() +
+                    ", cost time(ms):" + (System.currentTimeMillis() - startTime))
+                    .printStackTrace();
+        } finally {
+            if (httpEntity != null) {
+                try {
+                    EntityUtils.consumeQuietly(httpEntity);
+                } catch (Exception e) {
+//                    e.printStackTrace();
+//                    logger.error("close response exception, url:" + uri + ", exception:" + e.toString()
+//                            + ", cost time(ms):" + (System.currentTimeMillis() - startTime));
+                    new Exception(
+                            "close response exception, url:" + uri +
+                                    ", exception:" + e.toString()
+                                    + ", cost time(ms):" + (System.currentTimeMillis() - startTime))
+                            .printStackTrace();
+                }
+            }
+        }
+        return responseBody;
+    }
+
+    /**
+     * * 创建请求
+     *
+     * @param uri         请求url
+     * @param methodName  请求的方法类型
+     * @param contentType contentType类型
+     * @param timeout     超时时间
+     * @return HttpRequestBase    返回类型
+     * @author lisc
+     */
+    public static HttpRequestBase getRequest(String uri, String methodName, String contentType, int timeout) {
+        if (httpClient == null) {
+            initPools();
+        }
+        HttpRequestBase method;
+        if (timeout <= 0) {
+            timeout = DEFAULT_TIME_OUT;
+        }
+        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(timeout * 1000)
+                .setConnectTimeout(timeout * 1000).setConnectionRequestTimeout(timeout * 1000)
+                .setExpectContinueEnabled(false).build();
+        if (HttpPut.METHOD_NAME.equalsIgnoreCase(methodName)) {
+            method = new HttpPut(uri);
+        } else if (HttpPost.METHOD_NAME.equalsIgnoreCase(methodName)) {
+            method = new HttpPost(uri);
+        } else if (HttpGet.METHOD_NAME.equalsIgnoreCase(methodName)) {
+            method = new HttpGet(uri);
+        } else {
+            method = new HttpPost(uri);
+        }
+
+        if (StringUtils.isBlank(contentType)) {
+            contentType = DEFAULT_CONTENT_TYPE;
+        }
+        method.addHeader("Content-Type", contentType);
+        method.addHeader("Accept", contentType);
+        method.setConfig(requestConfig);
+        return method;
+    }
+
+    /**
+     * 执行GET 请求
+     *
+     * @param uri 网址
+     * @return responseBody
+     */
+    public static String execute(String uri) {
+        long startTime = System.currentTimeMillis();
+        HttpEntity httpEntity = null;
+        HttpRequestBase method = null;
+        String responseBody = "";
+        try {
+            if (httpClient == null) {
+                initPools();
+            }
+            method = getRequest(uri, HttpGet.METHOD_NAME, DEFAULT_CONTENT_TYPE, 0);
+            HttpContext context = HttpClientContext.create();
+            CloseableHttpResponse httpResponse = httpClient.execute(method, context);
+            httpEntity = httpResponse.getEntity();
+            if (httpEntity != null) {
+                responseBody = EntityUtils.toString(httpEntity, "UTF-8");
+//                logger.info("请求URL: " + uri + "+ 返回状态码：" + httpResponse.getStatusLine().getStatusCode());
+            }
+        } catch (Exception e) {
+            if (method != null) {
+                method.abort();
+            }
+            e.printStackTrace();
+//            logger.error("execute get request exception, url:" + uri + ", exception:" + e.toString() + ",cost time(ms):"
+//                    + (System.currentTimeMillis() - startTime));
+            System.out.println("log:调用 HttpClientPoolUtil execute get request exception, url:" + uri + ", exception:" + e.toString() + ",cost time(ms):"
+                    + (System.currentTimeMillis() - startTime));
+        } finally {
+            if (httpEntity != null) {
+                try {
+                    EntityUtils.consumeQuietly(httpEntity);
+                } catch (Exception e) {
+//                    e.printStackTrace();
+//                    logger.error("close response exception, url:" + uri + ", exception:" + e.toString()
+//                            + ",cost time(ms):" + (System.currentTimeMillis() - startTime));
+                    new Exception("close response exception, url:" + uri + ", exception:" + e.toString()
+                            + ",cost time(ms):" + (System.currentTimeMillis() - startTime))
+                            .printStackTrace();
+                }
+            }
+        }
+        return responseBody;
+    }
+}
\ No newline at end of file

src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/TaosRestfulDriverTest.java

+package com.taosdata.jdbc.rs;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.sql.*;
+
+public class TaosRestfulDriverTest {
+
+    @Test
+    public void testCase001() {
+        try {
+            Class.forName("com.taosdata.jdbc.rs.TaosRestfulDriver");
+            Connection connection = DriverManager.getConnection("jdbc:TAOS-RS://master:6041/?user=root&password=taosdata");
+            Statement statement = connection.createStatement();
+            ResultSet resultSet = statement.executeQuery("select * from log.log");
+            ResultSetMetaData metaData = resultSet.getMetaData();
+            while (resultSet.next()) {
+                for (int i = 1; i <= metaData.getColumnCount(); i++) {
+                    String column = metaData.getColumnLabel(i);
+                    String value = resultSet.getString(i);
+                    System.out.print(column + ":" + value + "\t");
+                }
+                System.out.println();
+            }
+            statement.close();
+            connection.close();
+        } catch (SQLException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void testAcceptUrl() throws SQLException {
+        Driver driver = new TaosRestfulDriver();
+        boolean isAccept = driver.acceptsURL("jdbc:TAOS-RS://master:6041");
+        Assert.assertTrue(isAccept);
+    }
+
+}