Versioning Configuration

Use Cases

By enabling versioning, you can store multiple versions of an object in a bucket and retrieve, delete, or restore it to a specified version.
For more information, see Versioning Overview.

Only the root account and authorized sub-accounts can configure the versioning status of a bucket.

How to Use

Using the REST API

You can use the REST API to configure versioning and manage the objects on different versions. For more information, see the following API documents:

• PUT Bucket versioning
• GET Buket versioning
• PUT Object
• GET Object
• DELETE Object

Using the SDK for Android

This method is provided in the COS SDK for Android. For more information, see Bucket Management for the SDK.

Configuring Versioning

Directions:

1. Call the PutBucketVersioningRequest constructor to instantiate the PutBucketVersioningRequest object.
2. Call the putBucketVersioning(PutBucketVersioningRequest) sync method of CosXmlService to pass in PutBucketVersioningRequest and return the PutBucketVersioningResult object (or call the putBucketVersionAsync method to pass in PutBucketVersioningRequest and CosXmlResultListener for async callback).

Sample code:

String bucket = "bucket";
PutBucketVersioningRequest request = new PutBucketVersioningRequest(bucket);
request.setEnableVersion(true);// Enable
request.setSign(signDuration,null,null); // Signature
try {
PutBucketVersioningResult result = cosXmlService.putBucketVersioning(request);
Log.w("TEST","success");
} catch (CosXmlClientException e) {
Log.w("TEST","CosXmlClientException =" + e.toString());
} catch (CosXmlServiceException e) {
Log.w("TEST","CosXmlServiceException =" + e.toString());
}
// **Use the async callback to request**
/**

cosXmlService.putBucketVersionAsync(request, new CosXmlResultListener() {
@Override
public void onSuccess(CosXmlRequest cosXmlRequest, CosXmlResult cosXmlResult) {
Log.w("TEST","success");
}
@Override
public void onFail(CosXmlRequest cosXmlRequest, CosXmlClientException clientException, CosXmlServiceException 
serviceException)  {
String errorMsg = clientException != null ? clientException.toString() : serviceException.toString();
Log.w("TEST",errorMsg);
}
});
*/

Querying Versioning

Directions:

1. Call the GetBucketVersioningRequest constructor to instantiate the GetBucketVersioningRequest object.
2. Call the getBucketVersioning(GetBucketVersioningRequest) sync method of CosXmlService to pass in GetBucketVersioningRequest and return the GetBucketVersioningResult object (or call the getBucketVersioningAsync method to pass in GetBucketVersioningRequest and CosXmlResultListener for async callback).

Sample code:

String bucket = "bucket";
GetBucketVersioningRequest request = new GetBucketVersioningRequest(bucket);
request.setSign(signDuration,null,null); // Signature
try {
GetBucketVersioningResult result = cosXmlService.getBucketVersioning(request);
Log.w("TEST","success");
} catch (CosXmlClientException e) {
Log.w("TEST","CosXmlClientException =" + e.toString());
} catch (CosXmlServiceException e) {
Log.w("TEST","CosXmlServiceException =" + e.toString());
}
// **Use the async callback to request**
/**
cosXmlService.getBucketVersioningAsync(request, new CosXmlResultListener() {
@Override
public void onSuccess(CosXmlRequest cosXmlRequest, CosXmlResult cosXmlResult) {
Log.w("TEST","success");
}
@Override
public void onFail(CosXmlRequest cosXmlRequest, CosXmlClientException clientException, CosXmlServiceException 
serviceException)  {
String errorMsg = clientException != null ? clientException.toString() : serviceException.toString();
Log.w("TEST",errorMsg);
}
});
*/

Using the SDK for iOS

This method is provided in the COS SDK for iOS. For more information, see Bucket Management for the SDK.

Configuring Versioning

Directions:

1. Generate a QCloudPutBucketVersioningRequest instance and enter the corresponding configuration to suspend or enable versioning. For specific settings, see the sample code below.
2. Call the PutBucketVersioning method of QCloudCOSXMLService to initiate a request.

Sample code:

QCloudPutBucketVersioningRequest* request = [[QCloudPutBucketVersioningRequest alloc] init];
 request.bucket = @"testBucket-123456789";
 QCloudBucketVersioningConfiguration* configuration = [[QCloudBucketVersioningConfiguration alloc] init];
 request.configuration = configuration;
 configuration.status = QCloudCOSBucketVersioningStatusEnabled;
 [request setFinishBlock:^(id outputObject, NSError* error) {
   // Set the completion callback
 }];
 [[QCloudCOSXMLService defaultCOSXML] PutBucketVersioning:request];

Querying Versioning

Directions:

1. Generate a QCloudetBucketVersioningRequest instance and set the bucket attributes.
2. Call the GetBucketVersioning method of QCloudCOSXMLService to initiate a request.

Sample code:

QCloudGetBucketVersioningRequest* request = [[QCloudGetBucketVersioningRequest alloc] init];
request.bucket = @"testBucket-123456789";
[request setFinishBlock:^(QCloudBucketVersioningConfiguration* result, NSError* error) {
 // Set the completion callback
}];
[[QCloudCOSXMLService defaultCOSXML] GetBucketVersioning:request];

Uploading an Object

Directions:

1. After versioning is enabled, a VersionID will be automatically generated for an uploaded object.
2. After successful upload, the VersionID will be returned in QCloudUploadObjectResult.

Sample code:

QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];

   NSURL* url = /*file URL*/;
   put.object = @"filename.jpg";
   put.bucket = @"test-123456789";
   put.body =  url;
   [put setSendProcessBlock:^(int64_t bytesSent, int64_t totalBytesSent, int64_t totalBytesExpectedToSend) {
       NSLog(@"upload %lld totalSend %lld aim %lld", bytesSent, totalBytesSent, totalBytesExpectedToSend);
   }];
   [put setFinishBlock:^(QCloudUploadObjectResult* result, NSError* error) {
   if ( nil == error) {
        NSString *versionID = result.versionID;// Get versionID here
      }
   }];
   [[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];

Downloading an Object

Directions:

1. Generate a QCloudGetObjectRequset instance and set the corresponding bucket and object attributes.
2. Call the GetBucketVersioning method of QCloudCOSXMLService to initiate a request.

Sample code:

QCloudGetObjectRequest* request = [QCloudGetObjectRequest new];
// Set the download path URL; if this is set, the file will be downloaded to the specified path; otherwise, the file will be downloaded to the memory and stored in the outputObject of the finishBlock.
request.downloadingURL = [NSURL URLWithString:QCloudTempFilePathWithExtension(@"downding")];
request.object = @"your Object-Key";
request.bucket = @"testBucket-123456789";
request.versionID = @"12345678910";
[request setFinishBlock:^(id outputObject, NSError *error) {
  //additional actions after finishing
}];
  [request setDownProcessBlock:^(int64_t bytesDownload, int64_t totalBytesDownload, int64_t totalBytesExpectedToDownload) {
   // Download progress
  }];
  [[QCloudCOSXMLService defaultCOSXML] GetObject:request];

Deleting an Object

Directions:

1. Generate a QCloudDeleteObjectRequest instance and set the corresponding bucket and object attributes.
2. Set the versionID or deleteMarker.
3. Call the DeleteObject method of QCloudCOSXMLService to initiate a request.

Sample code:

QCloudDeleteObjectRequest* deleteObjectRequest = [QCloudDeleteObjectRequest new];
deleteObjectRequest.bucket = <#object#>;
deleteObjectRequest.object = <#bucket#>;
deleteObjectRequest.versionId = @"versionID"
[deleteObjectRequest setFinishBlock:^(id outputObject, NSError *error) {
 if (nil == error) {
    <#success call back#>
} else {
<#fail call back#>
}
}];
[[QCloudCOSXMLService defaultCOSXML] DeleteObject:deleteObjectRequest];