Performing a Multipart Copy

As a special case of multipart upload, multipart copy implements multipart upload by copying the whole or part of an object in a bucket.

You can call copyPart to copy parts.

Sample code is as follows:

static OBSClient *client;
NSString *endPoint = @"your-endpoint";
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
char* ak_env = getenv("AccessKeyID");
char* sk_env = getenv("SecretAccessKey");
NSString *AK = [NSString stringWithUTF8String:ak_env];
NSString *SK = [NSString stringWithUTF8String:sk_env];
    
// Initialize identity authentication.
OBSStaticCredentialProvider *credentialProvider = [[OBSStaticCredentialProvider alloc] initWithAccessKey:AK secretKey:SK];
    
//Initialize service configuration.
OBSServiceConfiguration *conf = [[OBSServiceConfiguration alloc] initWithURLString:endPoint credentialProvider:credentialProvider];
    
// Initialize an instance of OBSClient.
client = [[OBSClient alloc] initWithConfiguration:conf];
 
// Copy parts.
OBSCopyPartRequest* copyRequest =
[[OBSCopyPartRequest alloc]initWithSrcBucketName:@"bucketName"
                                        srcObjectKey:@"MultiPart"
                                    uploadBucketName:@"bucketName"
                                     uploadObjectKey:@"MultiPart"
                                    uploadPartNumber:[NSNumber numberWithInt:3]
                                            uploadID:@"uploadID"];
    
[client copyPart:copyRequest completionHandler:^(OBSCopyPartResponse *response, NSError *error) {
    NSLog(@"%@",response);
}];

• For details about the meanings, causes, and handling methods of possible error codes returned during the operation, see OBS Server-Side Error Codes, SDK Custom Exceptions, and SDK Common Response Headers.