package com.ruoyi.service.impl;

import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.service.DownLoadFileService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpServletResponse;
import java.io.*;

/**
 * @Version 1.0
 * @Author Jin_quan Ou
 * @Date 2023-03-19 17:33
 */
@Service
@Slf4j
public class DownLoadFileServiceImpl implements DownLoadFileService {

    @Override
    public void downLoadFile(String path, HttpServletResponse response) {

        path = path.substring(8);
        try {
            if (!FileUtils.checkAllowDownload(path)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", path));
            }
            String realFileName = System.currentTimeMillis() + path.substring(path.indexOf("_") + 1);
            String filePath = RuoYiConfig.getProfile() + path;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());

        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }
}