【Azure 存储服务】Azure Blob Storage SDK 升级失败，遇见 Unsatisfied Dependency Exception 和 Unexpected Length Exception

问题描述

在升级Java Azure Blob Storage SDK的过程中，先后遇见了 UnsatisfiedDependencyException 和 UnexpectedLengthException.

错误一：Org.springframework.beans.factory UnsatisfiedDependencyException: Error creating bean with name 'azureFileServiceImpl': Unsatisfied dependency expressed through field 'blobServiceClient'.

错误二：com.azure.core.exception UnexpectedLengthException Request body emitted 27183 bytes, less than the expected 31671447552 bytes.

问题解答

对于问题一：UnsatisfiedDependencyException  错误，一般来说，都是应用中引入包的版本不兼容导致，最好的办法就是升级到当前最新的版本。如把 springboot 版本升级到了2.5.6，azure storage blob版本升级到12.13.0。

但当问题一解决后，引发了问题二：com.azure.core.exception UnexpectedLengthException Request body emitted 27183 bytes, less than the expected 31671447552 bytes。

经过对代码中涉及到 File Length， Size等代码的调试后，发现问题所在：Azure storage Blob 由12.4.0升级到12.13.0后，获取文件的 length 发生了变化。

由旧版本的 file对象的 getTotalSpace()  变为 FileInputstream对象的 available() 。 

代码改动截图如下：

附录一：UploadExportFile 完整代码

@Service
public class AzureServiceImpl implements AzureService{ 

    @Autowired
    private BlobServiceClient blobServiceClient;

    @Autowired
    private SysResourceMapper sysResourceMapper;

    @Autowired
    private SysOfflineExportMapper sysOfflineExportMapper;

    @Autowired
    private SysOfflineExportService sysOfflineExportService;

    @Override
    public boolean uploadExportFile(File file, SysOfflineExport export) {
        BlobContainerClient blobContainerClient = blobServiceClient.getBlobContainerClient("uploadblobdata");
        if(!blobContainerClient.exists()){
            createBlobContainer();
        }
        FileInputStream fileInputStream;
        try {
            fileInputStream = new FileInputStream(file);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            export.setLog(e.getMessage());
            export.setStatus(OperationStatus.Done);
            export.setResultType(ResultType.Failed);
            sysOfflineExportService.updateByUuid(export);
            return false;
        }
        //long size = file.getTotalSpace();
        long size = fileInputStream.available();
        String fileName = export.getFilenames();
        BlobClient blobClient = blobContainerClient.getBlobClient(fileName);
        blobClient.upload(fileInputStream,size);
        String blobUrl = blobClient.getBlobUrl();
        export.setDownloadurl(blobUrl);
        sysOfflineExportService.updateByUuid(export);
        if(StringUtils.isNotBlank(blobUrl)){
            export.setStatus(OperationStatus.Done);
            export.setResultType(ResultType.Success);
            sysOfflineExportService.updateByUuid(export);
            return true;
        }
        export.setStatus(OperationStatus.Done);
        export.setLog("upload file to blob failed！");
        sysOfflineExportService.updateByUuid(export);
        return false;
    }

}