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package com.luhuiguo.fastdfs.proto.storage;

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.io.IOUtils;

/**
 * 文件下载回调方法
 * 
 * @author tobato
 *
 */
public class DownloadFileWriter implements DownloadCallback {

    /**
     * 文件名称
     */
    private String fileName;

    public DownloadFileWriter(String fileName) {
        this.fileName = fileName;
    }

    /**
     * 文件接收处理
     */
    @Override
    public String recv(InputStream ins) throws IOException {
        FileOutputStream out = null;
        InputStream in = null;
        try {
            out = new FileOutputStream(fileName);
            in = new BufferedInputStream(ins);
            // 通过ioutil 对接输入输出流，实现文件下载
            IOUtils.copy(in, out);
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭流
            IOUtils.closeQuietly(in);
            IOUtils.closeQuietly(out);
        }
        return fileName;
    }

}