org.kawanfw.sql.jdbc.http.JdbcHttpStatementTransfer Maven / Gradle / Ivy

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/*
 * This file is part of AceQL. 
 * AceQL: Remote JDBC access over HTTP.                                     
 * Copyright (C) 2015,  KawanSoft SAS
 * (http://www.kawansoft.com). All rights reserved.                                
 *                                                                               
 * AceQL is free software; you can redistribute it and/or                 
 * modify it under the terms of the GNU Lesser General Public                    
 * License as published by the Free Software Foundation; either                  
 * version 2.1 of the License, or (at your option) any later version.            
 *                                                                               
 * AceQL is distributed in the hope that it will be useful,               
 * but WITHOUT ANY WARRANTY; without even the implied warranty of                
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU             
 * Lesser General Public License for more details.                               
 *                                                                               
 * You should have received a copy of the GNU Lesser General Public              
 * License along with this library; if not, write to the Free Software           
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
 * 02110-1301  USA
 *
 * Any modifications to this file must keep this entire header
 * intact.
 */
package org.kawanfw.sql.jdbc.http;

import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;
import java.util.Vector;

import org.kawanfw.commons.api.client.InvalidLoginException;
import org.kawanfw.commons.client.http.HttpTransfer;
import org.kawanfw.commons.client.http.SimpleNameValuePair;
import org.kawanfw.commons.util.FrameworkDebug;
import org.kawanfw.commons.util.FrameworkFileUtil;
import org.kawanfw.commons.util.KeepTempFilePolicyParms;
import org.kawanfw.commons.util.Tag;
import org.kawanfw.file.util.parms.Parameter;
import org.kawanfw.file.util.parms.ReturnCode;
import org.kawanfw.sql.api.client.InvalidatedSessionException;
import org.kawanfw.sql.jdbc.ConnectionHttp;
import org.kawanfw.sql.jdbc.util.StatementHolderFileList;
import org.kawanfw.sql.jdbc.util.StatementHolderListEncryptor;
import org.kawanfw.sql.json.ConnectionHolder;
import org.kawanfw.sql.json.ConnectionHolderTransport;
import org.kawanfw.sql.json.StatementHolder;
import org.kawanfw.sql.json.StatementHolderTransport;
import org.kawanfw.sql.transport.TransportConverter;
import org.kawanfw.sql.util.ConnectionParms;
import org.kawanfw.sql.util.SqlAction;
import org.kawanfw.sql.util.SqlReturnCode;

/**
 * 
 * Class that execute all http transfer to the server, and gets back the results
 * 
 */
public class JdbcHttpStatementTransfer {
    /** Set to true to display/log debug info */
    private static boolean DEBUG = FrameworkDebug
	    .isSet(JdbcHttpStatementTransfer.class);

    /** The Http Connection */
    private ConnectionHttp connectionHttp = null;

    /** The Authentication Token */
    private String authenticationToken = null;

    /**
     * Protected constructor, not callable
     */
    protected JdbcHttpStatementTransfer() {
    }

    /**
     * Constructor
     * 
     * @param connectionHttp
     *            the http Connection
     * @param authenticationToken
     *            the Http Connection Authentication Token
     */

    public JdbcHttpStatementTransfer(ConnectionHttp connectionHttp,
	    String authenticationToken) {
	this.connectionHttp = connectionHttp;
	this.authenticationToken = authenticationToken;

	debug(new java.util.Date() + " Uploading statement file...");
    }

    /**
     * Execute a remote sql execute query statement and get the the file of the
     * result
     * 
     * @param statementHolder
     *            the statement to execute on server
     * 
     * @return the received file
     */
    public File getFileFromExecuteQueryOnServer(StatementHolder statementHolder)
	    throws SQLException {

	HttpTransfer httpTransfer = connectionHttp.getHttpTransfer();

	// Prepare the request parameters
	List requestParams = new Vector();
	requestParams.add(new SimpleNameValuePair(Parameter.ACTION,
		SqlAction.ACTION_SQL_STATEMENT));
	requestParams.add(new SimpleNameValuePair(Parameter.USERNAME,
		connectionHttp.getUsername()));
	requestParams.add(new SimpleNameValuePair(Parameter.TOKEN,
		authenticationToken));

	requestParams.add(new SimpleNameValuePair(ConnectionParms.CONNECTION_ID,
		connectionHttp.getConnectionId()));

	// Store the Connections commit mode / read only mode / transaction
	// isolation
	ConnectionHolder connectionHolder = new ConnectionHolder(connectionHttp);
	String jsonString = ConnectionHolderTransport.toJson(connectionHolder);
	requestParams.add(new SimpleNameValuePair(SqlAction.CONNECTION_HOLDER,
		jsonString));

	// Execute the statement waiting
	List statementHolderList = new Vector();
	statementHolderList.add(statementHolder); // Only one StatementHolder

	StatementHolderListEncryptor.encrypt(statementHolderList,
		connectionHttp);

	jsonString = StatementHolderTransport.toJson(statementHolderList);
	requestParams.add(new SimpleNameValuePair(SqlAction.STATEMENT_HOLDER,
		jsonString));

	httpTransfer.setReceiveInFile(true); // To say we get the result into a
					     // file
	File receiveFile = null;

	try {
	    httpTransfer.send(requestParams);

	    receiveFile = httpTransfer.getReceiveFile();
	    String receive = FrameworkFileUtil.getFirstLineOfFile(receiveFile);
	    debug("JdbcHttpStatementTransfer.getReceiveFile(): " + receiveFile
		    + ":");

	    if (receive.startsWith(ReturnCode.INVALID_LOGIN_OR_PASSWORD)) {

		if (!DEBUG && !KeepTempFilePolicyParms.KEEP_TEMP_FILE) {
		    receiveFile.delete();
		}

		throw new InvalidLoginException();
	    }

	    if (receive.startsWith(SqlReturnCode.SESSION_INVALIDATED)) {
		throw new SQLException(new InvalidatedSessionException());
	    }

	} catch (Exception e) {
	    JdbcHttpTransferUtil.wrapExceptionAsSQLException(e);
	}

	// We are done: return the received string
	return receiveFile;

    }

    /**
     * Execute a remote sql execute update statement and get the string
     * 
     * @param statementHolderFileList
     *            the list of statement + parameters to execute
     * @return the result of the execute update
     */
    public String getStringFromExecuteUpdateListOnServer(
	    StatementHolderFileList statementHolderFileList)
	    throws SQLException {

	// First, we close the file!
	statementHolderFileList.close();

	if (statementHolderFileList.isEmpty()) {
	    String message = Tag.PRODUCT_PRODUCT_FAIL
		    + "Nothing to execute: statementHolderList is empty!";
	    throw new SQLException(message, new IOException(message));
	}

	HttpTransfer httpTransfer = connectionHttp.getHttpTransfer();
	// debug("this.connectionHttp.getHost()    : " +
	// connectionHttp.getUrl());

	// Launch the Servlet

	List requestParams = new Vector();
	requestParams.add(new SimpleNameValuePair(Parameter.ACTION,
		SqlAction.ACTION_SQL_STATEMENT));
	requestParams.add(new SimpleNameValuePair(Parameter.USERNAME,
		connectionHttp.getUsername()));
	requestParams.add(new SimpleNameValuePair(Parameter.TOKEN,
		this.authenticationToken));

	requestParams.add(new SimpleNameValuePair(ConnectionParms.CONNECTION_ID,
		connectionHttp.getConnectionId()));

	// Store the Connections commit mode / read only mode / transaction
	// isolation
	ConnectionHolder connectionHolder = new ConnectionHolder(
		this.connectionHttp);
	String jsonString = ConnectionHolderTransport.toJson(connectionHolder);
	requestParams.add(new SimpleNameValuePair(SqlAction.CONNECTION_HOLDER,
		jsonString));

	// Execute all the statements waiting
	if (statementHolderFileList.size() < connectionHttp
		.getMaxStatementsForMemoryTransport()) {

	    jsonString = StatementHolderTransport
		    .toJson(statementHolderFileList.getStatementHolderList());
	    requestParams.add(new SimpleNameValuePair(
		    SqlAction.STATEMENT_HOLDER, jsonString));

	    // Delete the associated file
	    statementHolderFileList.delete();

	    try {
		httpTransfer.send(requestParams);
	    } catch (Exception e) {
		JdbcHttpTransferUtil.wrapExceptionAsSQLException(e);
	    }

	} else {
	    // debug("StatementHolderFileList.size() >= maxStatementsForMemoryTransport)");

	    JdbcHttpFileTransfer jdbcHttpFileTransfer = new JdbcHttpFileTransfer(
		    this.connectionHttp);

	    jdbcHttpFileTransfer.uploadFile(
		    statementHolderFileList.getLocalFile(),
		    statementHolderFileList.getRemoteFileName());

	    String statementHolderParam = TransportConverter.KAWANFW_BYTES_STREAM_FILE
		    + statementHolderFileList.getRemoteFileName();
	    requestParams.add(new SimpleNameValuePair(
		    SqlAction.STATEMENT_HOLDER, statementHolderParam));

	    try {
		httpTransfer.send(requestParams);
	    } catch (Exception e) {
		JdbcHttpTransferUtil.wrapExceptionAsSQLException(e);
	    }
	}

	debug(new java.util.Date() + " Upload and processing done...");

	String receive = httpTransfer.recv();

	debug("httpTransfer.recv(): " + receive + ":");

	if (receive.startsWith(ReturnCode.INVALID_LOGIN_OR_PASSWORD)) {
	    throw new SQLException(new InvalidLoginException());
	}

	if (receive.startsWith(SqlReturnCode.SESSION_INVALIDATED)) {
	    throw new SQLException(new InvalidatedSessionException());
	}

	// We are done: return the received string
	return receive;

    }

    /**
     * Debug tool
     * 
     * @param s
     */

    // @SuppressWarnings("unused")
    private void debug(String s) {
	if (DEBUG) {
	    System.out.println(s);
	}
    }

}