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

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## Problem Analysis **Problem 1: UnsatisfiedDependencyException** * Cause: The application is using an incompatible version of the Azure Storage Blob SDK, causing the `azureFileServiceImpl` bean to be unable to be created. * Solution: Upgrade to the latest SDK version compatible with the application. In this case, upgrade from 2.5.6 to 12.13.0. **Problem 2: UnexpectedLengthException** * Cause: The file size obtained from the Azure Blob client is smaller than expected, causing the `com.azure.core.exception UnexpectedLengthException` error. * Possible cause: The Azure Storage Blob service changed the way it calculates the file size, which is now obtained using `available()` instead of `getTotalSpace()`. * Solution: Review the updated code that retrieves the file size and ensure it reflects the actual size received from Azure Blob. ## Code Modifications **Problem 1:** * The code initially used `file.getTotalSpace()` to calculate the file size. * After the upgrade to 12.13.0, the code uses `fileInputStream.available()` to get the available bytes in the `FileInputStream`. * The `available()` method might return a different value than `getTotalSpace()` due to the way it calculates the size. **Problem 2:** * The code previously used `file.available()` to get the file size before uploading it to Azure Blob. * After the upgrade, the code uses `fileInputStream.available()` to get the available bytes in the `FileInputStream`, which might be different than the previously calculated size. * The code should be updated to use the same approach as before the upgrade to ensure the correct file size is retrieved. ## Additional Notes * Review the updated code and ensure all related components are also upgraded to the latest compatible versions. * Consider adding logging statements throughout the code to track the file size calculations and compare them to ensure they match the expected values. * Investigate further if the issue persists and consult the official Azure Storage Blob documentation or community forums for further assistance.

正文

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;
    }

}

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

小编点评

正文

问题描述

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

附录一：UploadExportFile 完整代码

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