package com.base.util;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.amarsoft.are.ARE;
import com.amarsoft.awe.Configure;

public class DownloadAttUtil {

	public static void downloadAppIOS(String sFileName, String sPath,
			HttpServletResponse response) throws Exception {
//		sFileName = URLEncoder.encode(sFileName, "GBK");
		sFileName = new String(sFileName.getBytes(), "ISO-8859-1");
		response.reset();
		response.setHeader("Content-disposition", "attachment; filename="
				+ sFileName);
		File file = new File(sPath);
		response.setContentLength((int) file.length());
		FileInputStream fileInputStream = null;
		BufferedInputStream bufferedInputStream = null;
		OutputStream outputStream = null;
		try {
			response.setContentType("application/octet-stream");// 指明response的返回对象是文件流  
			// 读出文件到response  
			// 这里是先需要把要把文件内容先读到缓冲区  
			// 再把缓冲区的内容写到response的输出流供用户下载  
			fileInputStream = new FileInputStream(file);  
			bufferedInputStream = new BufferedInputStream(  
			        fileInputStream);  
			byte[] b = new byte[bufferedInputStream.available()];  
			bufferedInputStream.read(b);  
			outputStream = response.getOutputStream();  
			outputStream.write(b);  
		} catch (Exception e) {
			ARE.getLog().error(e);
			throw new Exception("输入流文件出现异常 ：" + e);
		}  finally {
			// 人走带门  
			bufferedInputStream.close();  
			outputStream.flush();  
			outputStream.close();
			fileInputStream.close();
		}
        
//        
//		
//		
//		
//		try (InputStream in = new FileInputStream(sPath)) {
//			FileUtils.copyFile(new File(sPath), response.getOutputStream());
//		} catch (Exception e) {
//			ARE.getLog().error(e);
//			throw new Exception("输入流文件出现异常 ：" + e);
//		}
	}

	public static void downloadAppAndroid(String sFileName, String sPath,
			HttpServletResponse response) throws Exception {
		sFileName = new String(sFileName.getBytes(), "ISO-8859-1");
		response.reset();
		response.setHeader("Content-disposition", "attachment; filename="
				+ sFileName);
		File file = new File(sPath);
		response.setContentLength((int) file.length());
		FileInputStream fileInputStream = null;
		BufferedInputStream bufferedInputStream = null;
		OutputStream outputStream = null;
		try {
			response.setContentType("application/octet-stream");// 指明response的返回对象是文件流  
			// 读出文件到response  
			// 这里是先需要把要把文件内容先读到缓冲区  
			// 再把缓冲区的内容写到response的输出流供用户下载  
			fileInputStream = new FileInputStream(file);  
			bufferedInputStream = new BufferedInputStream(  
			        fileInputStream);  
			byte[] b = new byte[bufferedInputStream.available()];  
			bufferedInputStream.read(b);  
			outputStream = response.getOutputStream();  
			outputStream.write(b);  
		} catch (Exception e) {
			ARE.getLog().error(e);
			throw new Exception("输入流文件出现异常 ：" + e);
		}  finally {
			// 人走带门  
			bufferedInputStream.close();  
			outputStream.flush();  
			outputStream.close();
			fileInputStream.close();
		}
        
	}

	/**
	 * 描述：下载附件设置response
	 * 
	 * @param fileName
	 * @param path
	 * @param fileSize
	 * @param response
	 * @param request
	 * @throws Exception
	 */
	public static void downloadAtt(String sFileName, String sPath,
			String sFileSize, HttpServletResponse response,
			HttpServletRequest request, String sDevType) throws Exception {
		if ("ios".equals(sDevType))
			sFileName = new String(sFileName.getBytes(), "ISO-8859-1");
		else
			sFileName = new String(sFileName.getBytes(), "ISO-8859-1");
		response.reset();
		response.setHeader("Content-disposition", "attachment; filename="
				+ sFileName);
		response.setContentType("application/octet-stream");// 指明response的返回对象是文件流  
		HttpSession session;
		Configure CurConfig;
		session = request.getSession(true);
		if ((session == null) || (session.getAttributeNames() == null)) {
			ARE.getLog().error("读取配置文件错误！请检查配置文件。");			
			throw new Exception("------Timeout------");
		}

		CurConfig = Configure.getInstance(session.getServletContext());
		if (CurConfig == null) {
			ARE.getLog().error("读取配置文件错误！请检查配置文件。");	
			throw new ServletException("读取配置文件错误！请检查配置文件。");
		}
		String path1 = CurConfig.getConfigure("FileSavePath");
		File file = new File(path1 + "/" + sPath);
		if (!file.exists()) {
			ARE.getLog().error("读取文件错误！请检查[文件。");
			throw new ServletException("读取文件错误！请检查[文件。");
		}
		response.setContentLength((int) file.length());
//		if (sFileSize != null && !"".equals(sFileSize)) {
//			response.setContentLength(Integer.valueOf(sFileSize));
//		} else {
//		}
		FileInputStream fileInputStream = null;
		BufferedInputStream bufferedInputStream = null;
		OutputStream outputStream = null;
		try {
			// 读出文件到response  
			// 这里是先需要把要把文件内容先读到缓冲区  
			// 再把缓冲区的内容写到response的输出流供用户下载  
			fileInputStream = new FileInputStream(file);  
			bufferedInputStream = new BufferedInputStream(  
					fileInputStream);  
			byte[] b = new byte[bufferedInputStream.available()];  
			bufferedInputStream.read(b);  
			outputStream = response.getOutputStream();  
			outputStream.write(b);
		} catch (Exception e) {
			ARE.getLog().error(e);
			throw new Exception("输入流文件出现异常 ：" + e);
		}  finally {
			// 人走带门  
			bufferedInputStream.close();  
			outputStream.flush();  
			outputStream.close();
			fileInputStream.close();
		}
	}

	/**
	 * 描述：设置response编码 编码默认UTF-8
	 * 
	 * @param response
	 * @param sCharset
	 */
	public static void setCharset(HttpServletResponse response, String sCharset) {
		if (null == sCharset)
			sCharset = "";
		if (sCharset.length() < 1)
			sCharset = "UTF-8";
		response.setContentType("text/html; charset=" + sCharset);
	}
}