package cn.eva.utils;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.OSSObject;
import com.aliyun.oss.model.ObjectMetadata;
import com.aliyun.oss.model.PutObjectResult;

import org.springframework.web.multipart.MultipartFile;
 
/**
 * @作者:恒
 * @创建时间: 2017年8月10日 下午4:49:13
 * 功能：阿里云上传文件类
 */
public class OSSClientUtil {
  
  private final Logger logger = LogManager.getLogger(OSSClientUtil.class);
  // 域名
  private String endpoint=EvaWebUtils.getProperties("endpoint");
  // 密钥
  private String accessKeyId=EvaWebUtils.getProperties("accessKeyId");
  //密匙
  private String accessKeySecret=EvaWebUtils.getProperties("accessKeySecret");
  //空间
  private String bucketName=EvaWebUtils.getProperties("bucketName"); 
  //目录1
  private String filedir1 = "filedir1 /";
 
  private OSSClient ossClient;
 
  public OSSClientUtil() {
    ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
  }
  
  //初始化
  public void init() {
    ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
  }
 
  //销毁
  public void destory() {
    ossClient.shutdown();
  }
 

 
  /**
   * @功能:上传图片文件
   * @param file
   * @return
   * @throws Exception
   * @作者: 恒
   * @创建时间: 2017年8月10日下午5:26:17
   */
  public String uploadPhotoOss(MultipartFile file) throws Exception {
    String originalFilename = file.getOriginalFilename();
    String type = ".png";
    if(originalFilename.contains("."))
    type = originalFilename.substring(originalFilename.lastIndexOf(".")).toLowerCase();
    SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMdd");  
    Random random = new Random();
    String name = filedir1+sdf.format(new Date()) + "/" + random.nextInt(10000) + System.currentTimeMillis() + type;
    try {
      InputStream inputStream = file.getInputStream();
      uploadFileOSS(inputStream,name);
      return name;
    } catch (Exception e) {
      throw new Exception("图片上传失败");
    }
  }
 
  /**
   * @功能:上传到OSS服务器  如果同名文件会覆盖服务器上的
   * @param instream 文件流
   * @param fileName 文件名称 包括后缀名
   * @return 出错返回"" ,唯一MD5数字签名
   * @作者: 恒
   * @创建时间: 2017年8月10日下午5:23:00
   */
  public String uploadFileOSS(InputStream instream, String fileName) {
    String ret = "";
    try {
      //创建上传Object的Metadata 
      ObjectMetadata objectMetadata = new ObjectMetadata();
      objectMetadata.setContentLength(instream.available());
      objectMetadata.setCacheControl("no-cache");
      objectMetadata.setHeader("Pragma", "no-cache");
      objectMetadata.setContentType(getcontentType(fileName.substring(fileName.lastIndexOf("."))));
      objectMetadata.setContentDisposition("inline;filename=" + fileName);
      //上传文件
      PutObjectResult putResult = ossClient.putObject(bucketName,fileName, instream, objectMetadata);
      ret = putResult.getETag();
    } catch (IOException e) {
      logger.error(e.getMessage(), e);
    } finally {
      try {
        if (instream != null) {
          instream.close();
         }
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
    return ret;
  }
 
  
  /**
   * @功能:删除文件
   * @作者: 恒
   * @创建时间: 2017年8月11日上午10:16:33
   */
  public void delFileOSS(String fileName){
      if(fileName!=null&&fileName.length()>0)
          ossClient.deleteObject(bucketName,fileName);
  }
}