com.ReceiveFileHandler.java Source code

Introduction

Here is the source code for com.ReceiveFileHandler.java

Source

package com;

import java.io.*;

import org.apache.logging.log4j.Logger;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelInboundHandlerAdapter;

/*
 * Copyright 2004-2005 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * 
 * @author SITO3
 *
 */
@Sharable
public class ReceiveFileHandler extends ChannelInboundHandlerAdapter {
    private Logger logger;
    private String fileName;
    private BufferedOutputStream bos = null;
    private Server server = null;

    /**
     * Receive file handler
     * @param fs FtpSessionHandler object
     * @param fileName the location of the file to be resided.
     * @param responseCtx A ChannelHandlerContext for sending file receive result to client
     * @param passiveServer PassiveServer object
     */
    public ReceiveFileHandler(String fileName, Server server) {
        this.fileName = fileName;
        this.server = server;
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        try {
            bos = new BufferedOutputStream(new FileOutputStream(new File(fileName)));
        } catch (FileNotFoundException err) {
            err.printStackTrace();
        }
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf in = (ByteBuf) msg;

        try {
            while (in.isReadable()) {
                in.readBytes(bos, in.readableBytes());
            }
            bos.flush();
        } finally {
            in.release();
        }
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        if (bos == null) {
            ctx.channel().close();
        } else {
            try {
                bos.flush();
                bos.close();
                bos = null;
                ctx.channel().close().addListener(new FileTransferCompleteListener(server));
            } catch (Exception err) {
                logger.debug(err.getMessage());
                ctx.channel().close();
            }
        }
    }

    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        cause.printStackTrace();
    }
}