使用流式上传后台报错：

@PostMapping("/uploadPart1") public String uploadPart1(MultipartFile file) throws Exception { List<PartEtag> partEtags = Collections.synchronizedList(new ArrayList<PartEtag>()); String objectKey = String.valueOf(UUID.randomUUID()); // 1、获取uploadId InitiateMultipartUploadRequest request = new InitiateMultipartUploadRequest(obsEntity.getBucketName(), keySuffixWithSlash + objectKey); InitiateMultipartUploadResult result = obsClient.initiateMultipartUpload(request); String uploadId = result.getUploadId(); // 2、分段上传 long partSize = 1*1024*1024; // 1MB long fileLength = file.getSize(); long partCount = fileLength % partSize == 0 ? fileLength / partSize : fileLength / partSize + 1; if(partCount > 10000) { throw new Exception(); } InputStream inputStream = file.getInputStream(); for (long i = 0; i < partCount; i++) { long offset = i * partSize; long currPartSize = (i + 1 == partCount) ? fileLength - offset : partSize; UploadPartRequest uploadPartRequest = new UploadPartRequest(); uploadPartRequest.setBucketName(obsEntity.getBucketName()); uploadPartRequest.setObjectKey(keySuffixWithSlash + objectKey); uploadPartRequest.setUploadId(uploadId); uploadPartRequest.setInput(inputStream); uploadPartRequest.setPartSize(currPartSize); uploadPartRequest.setOffset(offset); uploadPartRequest.setPartNumber((int) (i+1)); UploadPartResult uploadPartResult = obsClient.uploadPart(uploadPartRequest); partEtags.add(new PartEtag(uploadPartResult.getEtag(), uploadPartResult.getPartNumber())); } if(partEtags.size() != partCount) { throw new Exception(); }// listAllParts(uploadId,objectKey); // 3、开启聚合 Collections.sort(partEtags, new Comparator<PartEtag>() { @Override public int compare(PartEtag o1, PartEtag o2) { return o1.getPartNumber() - o2.getPartNumber(); } }); CompleteMultipartUploadRequest completeMultipartUploadRequest = new CompleteMultipartUploadRequest(obsEntity.getBucketName(), keySuffixWithSlash + objectKey, uploadId, partEtags); obsClient.completeMultipartUpload(completeMultipartUploadRequest); return "success"; }用postman调用接口，总是报

状况描述：1、自己创建word文档并用obs-browser上传到OBS，然后通过页面下载，能打开文件；2、服务器后台程序通过PutObject转移到OBS的大量文档，通过页面下载后打不开，但是用obs-browser下载来可以打开。不知缺少什么没有设置？控制器返回FileContentResult，代码如下或者有更好的方式，望指点。谢谢：public FileContentResult Download(int id){ ObsConfig config = new ObsConfig(); config.Endpoint = "https://obs.cn-north-4.myhuaweicloud.com"; string bucketName = "mybucketName"; string accessKey = Environment.GetEnvironmentVariable("AccessKeyID", EnvironmentVariableTarget.Machine); string secretKey = Environment.GetEnvironmentVariable("SecretAccessKey", EnvironmentVariableTarget.Machine); ObsClient client = new ObsClient(accessKey, secretKey, config); //string obsurl = "%E6%A1%B6%E7%AD%96%E7%95%A5.png"; string obsurl = "%E4%B8%80%E4%B8%AA%20%E8%87%AA%E5%BB%BA%20%E6%96%87%E6%A1%A3.docx"; //string obsurl = "3/113/3/20210406092732/some.docx"; string utfurl = HttpUtility.UrlDecode(obsurl); GetObjectRequest request = new GetObjectRequest() { BucketName = bucketName, ObjectKey = utfurl }; string contentType = string.Empty; byte[] bytes = null; using (GetObjectResponse response = client.GetObject(request)) { contentType = response.ContentType; bytes = new byte[response.ContentLength]; response.OutputStream.Read(bytes, 0, bytes.Length); } return new FileContentResult(bytes, contentType) { FileDownloadName = "一个 自建 文档.docx" };}

BrowserJS 是否能删除文件夹

obs 有支持开发者支持 文件夹重命名的api 方案吗，还是只能一个一个去复制粘贴

https://support.huaweicloud.com/sdk-java-devg-obs/obs_21_0901.html通过临时URL访问OBS(Java SDK)调用该接口生成url，浏览器直接访问下载，总是报错：The request signature we calculated does not match the signature you provided. Check your key and signing method.

 之前用的阿里云，实现代码如下： DefaultProfile profile = DefaultProfile.getProfile( OssConfiguration.region, OssConfiguration.accessKey, OssConfiguration.secretKey); IAcsClient client = new DefaultAcsClient(profile);  AssumeRoleRequest request = new AssumeRoleRequest(); request.setDurationSeconds(OssConfiguration.expire); request.setRoleArn(OssConfiguration.roleArn); request.setRoleSessionName(OssConfiguration.roleSessionName);  AssumeRoleResponse.Credentials response = client.getAcsResponse(request).getCredentials(); 切换到华为云，代码要怎么实现呢， 使用到哪些类？ 

使用的是最新版本的、、、、、、、、、、

Execution failed for task ':driver:compileDebugJavaWithJavac'. > Could not resolve all files for configuration ':driver:debugCompileClasspath'.    > Failed to transform jackson-core-2.15.2.jar (com.fasterxml.jackson.core:jackson-core:2.15.2) to match attributes {artifactType=android-classes-jar, org.gradle.category=library, org.gradle.dependency.bundling=external, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-api}.       > Execution failed for JetifyTransform: C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-core\2.15.2\a6fe1836469a69b3ff66037c324d75fc66ef137c\jackson-core-2.15.2.jar.          > Failed to transform 'C:\Users\Administrator\.gradle\caches\modules-2\files-2.1\com.fasterxml.jackson.core\jackson-core\2.15.2\a6fe1836469a69b3ff66037c324d75fc66ef137c\jackson-core-2.15.2.jar' using Jetifier. Reason: IllegalArgumentException, message: Unsupported class file major version 61. (Run with --stacktrace for more details.)            Suggestions:             - Check out existing issues at https://issuetracker.google.com/issues?q=componentid:460323&s=modified_time:desc, it's possible that this issue has already been filed there.             - If this issue has not been filed, please report it at https://issuetracker.google.com/issues/new?component=460323 (run with --stacktrace and provide a stack trace if possible). 

OBS SDK中，C语言的SDK为啥某些函数不支持 https://bbs.huaweicloud.com/forum/thread-0266152380110309019-1-1.html  OBS有那么多不同语言的SDK，哪种上传/下载速度最快 https://bbs.huaweicloud.com/forum/thread-0249152379563688026-1-1.html  OBS怎么给桶分配权限 https://bbs.huaweicloud.com/forum/thread-0266152379283948018-1-1.html  OBS中的并行文件系统是什么原理？比起传统文件系统改进在哪里 https://bbs.huaweicloud.com/forum/thread-0297152378512172029-1-1.html  OBS中的Metadata 和 Data 有什么区别 https://bbs.huaweicloud.com/forum/thread-0297152378114343028-1-1.html  OBS上传图片（假设图片比较大，有15MB左右）后，问大概多久能生成缩略图 https://bbs.huaweicloud.com/forum/thread-0297152349334607020-1-1.html  在手机上通过Java OBS SDK上传文件，推荐开几个并发？为什么？ https://bbs.huaweicloud.com/forum/thread-0266152349263905013-1-1.html  OBS JavaScript的SDK在哪里下载？ https://bbs.huaweicloud.com/forum/thread-0297152349219764019-1-1.html  前端使用browserjs实现断点续传，上传过程中关闭浏览器，再次打开浏览器进入对应上传页面，无法再续传文件 https://bbs.huaweicloud.com/forum/thread-0220152157766309011-1-1.html  OBS能否给桶设置允许上传文件的类型 https://bbs.huaweicloud.com/forum/thread-0220151925139468006-1-1.html  OBS 能否对上传的图片自动生成加水印的图片？代码怎么写 https://bbs.huaweicloud.com/forum/thread-0269151292821745010-1-1.html  OBS官网案例-大数据分析这个场景里，OBS用在哪个地方？图上没有标出来 https://bbs.huaweicloud.com/forum/thread-02109151292749308013-1-1.html   OBS支持上传哪些类型的文件 https://bbs.huaweicloud.com/forum/thread-02120151292618183012-1-1.html  OBS怎么查看哪些是用户上传了一半然后中断的文件，并定时清理这些无效文件 https://bbs.huaweicloud.com/forum/thread-0272151292413155011-1-1.html   OBS上传一个文件，默认会生成几个副本来保证安全？ https://bbs.huaweicloud.com/forum/thread-0269151292358910008-1-1.html   Android studio 采用流式方法下载程序崩溃（Java） https://bbs.huaweicloud.com/forum/thread-02120151241432258011-1-1.html  华为云obs怎么实现取消下载 https://bbs.huaweicloud.com/forum/thread-0282150688236887024-1-1.html  JavaSDK上传文本数据到OBS问题 https://bbs.huaweicloud.com/forum/thread-02127150604424860031-1-1.html   华为云OBS不支持自己的鸿蒙NextOS的ArkTs语言版本 https://bbs.huaweicloud.com/forum/thread-0226150461518739031-1-1.html 

在我看来，不就是Restful http 协议吗，为啥C语言不支持，而其他语言都能支持？

OBS怎么给桶分配权限

OBS中的并行文件系统是什么原理？比起传统文件系统改进在哪里

OBS中的Metadata 和 Data 有什么区别