Java基于minio的视频下载

1、前端代码（Vue）

downloadFile(row) {
      downloadVideo(row, this.form).then((resp) => {
        const data = resp.data;
        if (data.data) {
          let path = data.data.url;
          window.location.href = path;
          this.$message.success(data.message);
        } else {
          this.$message.error(data.message || "下载视频失败");
        }
      });
    },

 

2、后端代码

Minio客户端：

import com.google.common.collect.Multimap;
import io.minio.*;
import io.minio.errors.*;
import io.minio.messages.Part;

import java.io.IOException;
import java.io.InputStream;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

/**
 * Created by TD on 2021/10/26
 * 扩展 MinioClient <很多protected 修饰符的分片方法，MinioClient实例对象无法使用，只能自定义类继承使用>
 * minio 大文件分片上传思路：
 * 1. 前端访问文件服务，请求上传文件，后端返回签名数据及uploadId
 * 2. 前端分片文件，携带签名数据及uploadId并发上传分片数据
 * 3. 分片上传完成后，访问合并文件接口，后台负责合并文件。
 */
public class PearlMinioClient extends MinioClient {


    public PearlMinioClient(MinioClient client) {
        super(client);
    }

    /**
     * 创建分片上传请求
     *
     * @param bucketName       存储桶
     * @param region           区域
     * @param objectName       对象名
     * @param headers          消息头
     * @param extraQueryParams 额外查询参数
     */
    @Override
    public CreateMultipartUploadResponse createMultipartUpload(String bucketName, String region, String objectName, Multimap<String, String> headers, Multimap<String, String> extraQueryParams) throws NoSuchAlgorithmException, InsufficientDataException, IOException, InvalidKeyException, ServerException, XmlParserException, ErrorResponseException, InternalException, InvalidResponseException {
        return super.createMultipartUpload(bucketName, region, objectName, headers, extraQueryParams);
    }

    /**
     * 完成分片上传，执行合并文件
     *
     * @param bucketName       存储桶
     * @param region           区域
     * @param objectName       对象名
     * @param uploadId         上传ID
     * @param parts            分片
     * @param extraHeaders     额外消息头
     * @param extraQueryParams 额外查询参数
     */
    @Override
    public ObjectWriteResponse completeMultipartUpload(String bucketName, String region, String objectName, String uploadId, Part[] parts, Multimap<String, String> extraHeaders, Multimap<String, String> extraQueryParams) throws NoSuchAlgorithmException, InsufficientDataException, IOException, InvalidKeyException, ServerException, XmlParserException, ErrorResponseException, InternalException, InvalidResponseException {
        return super.completeMultipartUpload(bucketName, region, objectName, uploadId, parts, extraHeaders, extraQueryParams);
    }


    /**
     * 查询分片数据
     *
     * @param bucketName       存储桶
     * @param region           区域
     * @param objectName       对象名
     * @param uploadId         上传ID
     * @param extraHeaders     额外消息头
     * @param extraQueryParams 额外查询参数
     */
    public ListPartsResponse listMultipart(String bucketName, String region, String objectName, Integer maxParts, Integer partNumberMarker, String uploadId, Multimap<String, String> extraHeaders, Multimap<String, String> extraQueryParams) throws NoSuchAlgorithmException, InsufficientDataException, IOException, InvalidKeyException, ServerException, XmlParserException, ErrorResponseException, InternalException, InvalidResponseException {
        return super.listParts(bucketName, region, objectName, maxParts, partNumberMarker, uploadId, extraHeaders, extraQueryParams);
    }

    public void putObject(String bucketName, String objectName, InputStream inputStream) throws IOException, ServerException, InsufficientDataException, ErrorResponseException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
        super.putObject(
                PutObjectArgs.builder()
                        .bucket(bucketName)
                        .object(objectName).stream(inputStream, inputStream.available(), -1)
                        .build());
        inputStream.close();
    }
}

获取带签名的临时下载地址：

@Slf4j
@AllArgsConstructor
@Component
public class MinioTemplateNew {

    /**
     * MinIO 客户端
     */
    PearlMinioClient pearlMinioClient;

    MinioProp minioProp;/**
     * 返回临时带签名、过期时间一天、PUT请求方式的访问URL
     *
     * @param bucketName  桶名
     * @param ossFilePath Oss文件路径
     * @return
     */
    @SneakyThrows
    public String getPresignedObjectUrlForPut(String bucketName, String ossFilePath, Map<String, String> queryParams) {
        return pearlMinioClient.getPresignedObjectUrl(
                GetPresignedObjectUrlArgs.builder()
                        .method(Method.PUT)
                        .bucket(bucketName)
                        .object(ossFilePath)
                        .expiry(60 * 60 * 24)
                        .extraQueryParams(queryParams)
                        .build());
    }

    /**
     * 返回临时带签名、过期时间一天、Get请求方式的访问URL
     *
     * @param bucketName  桶名
     * @param ossFilePath Oss文件路径
     * @return
     */
    @SneakyThrows
    public String getPresignedObjectUrlForGet(String bucketName, String ossFilePath, Map<String, String> queryParams) {
        return pearlMinioClient.getPresignedObjectUrl(
                GetPresignedObjectUrlArgs.builder()
                        .method(Method.GET)
                        .bucket(bucketName)
                        .object(ossFilePath)
                        .expiry(60 * 10)
                        .extraQueryParams(queryParams)
                        .build());
    }

}

Service层调用工具类方法，给前端返回临时下载路径：

// 生成临时路径过后，直接插入视频下载表，不用管是否下载成功、目前下载直接走的minio后端拿不到是否下载成功的状态
        String url = uploadFileService.getFileTemporaryDownloadUrl(video_.getZipUploadFileId());

3、注意：需要把minio上的bucket桶修改为read-write权限