package com.muyu.javacomplier;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.GetObjectRequest;
import com.aliyun.oss.model.ObjectMetadata;
import com.muyu.domain.constants.Result;

import java.io.File;

public class OSSFileDownload {

    private static final String endpoint = "https://oss-cn-shanghai.aliyuncs.com";

    private static final String accessKeyId = "LTAI5t8LmMHfW8ckPaAZR6oQ";

    private static final String accessKeySecret = "pwzEwkpxcTFgurkARyr7sG7V6syc9x";

    private static final String bucketName = "011811";
    // OSS文件路径
    private static final String filePath = "build/rule/version/";

    private static final String fileName = "engine";

    public static Result<Object> streamingDownload(String fileName) {

        String source = null;
        // 创建 OSSClient 实例
        OSSClient ossClient = new OSSClient(endpoint, accessKeyId, accessKeySecret);
        // 判断 bucket 是否存在
        Boolean flag_bucket = ossClient.doesBucketExist(bucketName);
        if (!flag_bucket) {
            System.out.println("bucket不存在");
            return Result.error("bucket不存在");
        }
        String objectName = fileName + ".java";
        Boolean flag_file = ossClient.doesObjectExist(bucketName, filePath + objectName);
        if (!flag_file) {
            System.out.println("预下载文件不存在");
            return Result.error("预下载文件不存在");
        }
        // 本地文件下载路径
        String localPath = "/home/" + objectName;
        ObjectMetadata object = ossClient.getObject(new GetObjectRequest(bucketName, filePath + objectName), new File(localPath));
        System.out.println(object);
        ossClient.shutdown();
        return Result.success(source);
    }
}