Overview

This document provides an overview of APIs and SDK sample codes related to uploading and replicating objects.

Simple operations

Multipart upload operations

SDK API Reference

For parameters and method description of all APIs in the SDK, please see SDK API Reference.

Advanced APIs (Recommended)

Uploading an object

The advanced APIs encapsulate the simple upload and multipart upload APIs and can intelligently select the upload method based on file size. They also support checkpoint restart for resuming interrupted operations.

Sample code 1: Uploading a local file

Objective-C

QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
/** Path of the local file. Ensure that the URL starts with "file://" in the following format:
1. [NSURL URLWithString:@"file:////var/mobile/Containers/Data/Application/DBPF7490-D5U8-4ABF-A0AF-CC49D6A60AEB/Documents/exampleobject"]
2. [NSURL fileURLWithPath:@"/var/mobile/Containers/Data/Application/DBPF7490-D5U8-4ABF-A0AF-CC49D6A60AEB/Documents/exampleobject"]
*/
NSURL* url = [NSURL fileURLWithPath:@"file URL"];
// Bucket name in the format: `BucketName-APPID`
put.bucket = @"examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
put.object = @"exampleobject";
// Content of the object to be uploaded. You can pass variables of the `NSData*` or `NSURL*` type.
put.body =  url;
// Monitor the upload progress
[put setSendProcessBlock:^(int64_t bytesSent,
                           int64_t totalBytesSent,
                           int64_t totalBytesExpectedToSend) {
    //      bytesSent                   Number of new bytes sent
    // totalBytesSent              Total number of bytes sent in the upload
    // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
}];
// Monitor the upload result.
[put setFinishBlock:^(id outputObject, NSError *error) {
    // outputObject contains information such as the ETag or custom headers in the response.
    NSDictionary * result = (NSDictionary *)outputObject;
}];
[put setInitMultipleUploadFinishBlock:^(QCloudInitiateMultipartUploadResult *
                                        multipleUploadInitResult,
                                        QCloudCOSXMLUploadObjectResumeData resumeData) {
    // This block will be called back after the Initiate Multipart Upload operation is complete so you can get resumeData and the uploadId.
    NSString* uploadId = multipleUploadInitResult.uploadId;
}];
[[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];

Note：

• For the complete sample, go to GitHub.
• You can generate a download URL for the uploaded file using the same key. For detailed directions, please see Generating a Pre-Signed Link. Please note that for private-read files, the download URL is only valid for a limited period of time.

Swift

let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();

// Bucket name in the format: `BucketName-APPID`
put.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
put.object = "exampleobject";

// Content of the object to be uploaded. You can pass variables of the `NSData*` or `NSURL*` type.
put.body = NSURL.fileURL(withPath: "Local File Path") as AnyObject;

// Monitor the upload result
put.setFinish { (result, error) in
    // Get the upload result.
    if let result = result {
        // ETag of the file
        let eTag = result.eTag
    } else {
        print(error!);
    }
}

// Monitor the upload progress.
put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in
    // bytesSent                   Number of new bytes sent
    // totalBytesSent              Total number of bytes sent in the upload
    // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
};
// Set the upload parameters.
put.initMultipleUploadFinishBlock = {(multipleUploadInitResult, resumeData) in
    // This block will be called back after the Initiate Multipart Upload operation is complete so you can get resumeData and the uploadId.
    if let multipleUploadInitResult = multipleUploadInitResult {
        let uploadId = multipleUploadInitResult.uploadId
    }
}

QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);

Note：

• For the complete sample, go to GitHub.
• You can generate a download URL for the uploaded file using the same key. For detailed directions, please see Generating a Pre-Signed Link. Please note that for private-read files, the download URL is only valid for a limited period of time.

Sample code 2: Uploading binary data

Objective-C

QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];

// Bucket name in the format: `BucketName-APPID`
put.bucket = @"examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
put.object = @"exampleobject";

// Content of the object to be uploaded. You can pass variables of the `NSData*` or `NSURL*` type.
put.body = [@"My Example Content" dataUsingEncoding:NSUTF8StringEncoding];

// Monitor the upload progress.
[put setSendProcessBlock:^(int64_t bytesSent,
                           int64_t totalBytesSent,
                           int64_t totalBytesExpectedToSend) {
    //      bytesSent                   Number of new bytes sent
    // totalBytesSent              Total number of bytes sent in the upload
    // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
}];

// Monitor the upload result.
[put setFinishBlock:^(id outputObject, NSError *error) {
    // `outputObject` contains all the HTTP response headers
    NSDictionary* info = (NSDictionary *) outputObject;
}];
[[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];

Note：

• For the complete sample, go to GitHub.
• You can generate a download URL for the uploaded file using the same key. For detailed directions, please see Generating a Pre-Signed Link. Please note that for private-read files, the download URL is only valid for a limited period of time.

Swift

let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();

// Bucket name in the format: `BucketName-APPID`
put.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
put.object = "exampleobject";

// Content of the object to be uploaded
let dataBody:NSData = "wrwrwrwrwrw".data(using: .utf8)! as NSData;
put.body = dataBody;

// Monitor the upload result.
put.setFinish { (result, error) in
    // Get the upload result.
    if let result = result {
        // ETag of the file
        let eTag = result.eTag
    } else {
        print(error!);
    }
}

// Monitor the upload progress.
put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in

    // bytesSent                   Number of new bytes sent
    // totalBytesSent              Total number of bytes sent in the upload
    // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
};

QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);

Note：

• For the complete sample, go to GitHub.
• You can generate a download URL for the uploaded file using the same key. For detailed directions, please see Generating a Pre-Signed Link. Please note that for private-read files, the download URL is only valid for a limited period of time.

Sample code 3. Suspending, resuming, and canceling an upload

Objective-C

To suspend an upload, use the code below:

NSError *error;
NSData *resmeData = [put cancelByProductingResumeData:&error];

To resume a suspended download, use the code below:

QCloudCOSXMLUploadObjectRequest *resumeRequest = [QCloudCOSXMLUploadObjectRequest requestWithRequestData:resmeData];
[[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:resumeRequest];

To cancel an upload, use the code below:

// Abort the upload.
[put abort:^(id outputObject, NSError *error) {

}];

Note：

• For the complete sample, go to GitHub.

Swift

To suspend an upload, use the code below:

var error : NSError?;
var uploadResumeData:Data = put.cancel(byProductingResumeData:&error) as Data;

To resume a suspended download, use the code below:

var resumeRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>.init(request: uploadResumeData);
QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(resumeRequest);

To cancel an upload, use the code below:

// Abort the upload.
put.abort { (outputObject, error) in

}

Note：

• For the complete sample, go to GitHub.

Sample code 4. Uploading multiple objects

Objective-C

for (int i = 0; i<20; i++) {
    QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];

    // Bucket name in the format: `BucketName-APPID`
    put.bucket = @"examplebucket-1250000000";

    // Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
    put.object = [NSString stringWithFormat:@"exampleobject-%d",i];

    // Content of the object to be uploaded. You can pass variables of the `NSData*` or `NSURL*` type.
    put.body = [@"My Example Content" dataUsingEncoding:NSUTF8StringEncoding];

    // Monitor the upload progress.
    [put setSendProcessBlock:^(int64_t bytesSent,
                               int64_t totalBytesSent,
                               int64_t totalBytesExpectedToSend) {
        //      bytesSent                   Number of new bytes sent
        // totalBytesSent              Total number of bytes sent in the upload
        // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
    }];

    // Monitor the upload result.
    [put setFinishBlock:^(id outputObject, NSError *error) {
        // `outputObject` contains all the HTTP response headers
        NSDictionary* info = (NSDictionary *) outputObject;
    }];
    [[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];
}

Swift

for i in 1...10 {
    let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();

    // Bucket name in the format: `BucketName-APPID`
    put.bucket = "examplebucket-1250000000";

    // Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
    put.object = "exampleobject-".appendingFormat("%d", i);

    // Content of the object to be uploaded
    let dataBody:NSData = "wrwrwrwrwrw".data(using: .utf8)! as NSData;
    put.body = dataBody;

    // Monitor the upload result.
    put.setFinish { (result, error) in
        // Get the upload result.
        if let result = result {
            // ETag of the file
            let eTag = result.eTag
        } else {
            print(error!);
        }
    }

    // Monitor the upload progress.
    put.sendProcessBlock = { (bytesSent, totalBytesSent,
        totalBytesExpectedToSend) in

        // bytesSent                   Number of new bytes sent
        // totalBytesSent              Total number of bytes sent in the upload
        // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
    };

    QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);
}

Copying an object

The advanced APIs encapsulate async requests for the simple copy and multipart copy APIs and support pausing, resuming, and canceling copy requests.

Sample code

Objective-C

QCloudCOSXMLCopyObjectRequest* request = [[QCloudCOSXMLCopyObjectRequest alloc] init];

// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";

// Source bucket containing the file; the current account needs to have access permission for the bucket, or the bucket should have public-read permission enabled.
request.sourceBucket = @"sourcebucket-1250000000";

// Name of the source file
request.sourceObject = @"sourceObject";

// APPID of the source file
request.sourceAPPID = @"1250000000";

// Source region
request.sourceRegion= @"COS_REGION";

[request setFinishBlock:^(QCloudCopyObjectResult* result, NSError* error) {
    // outputObject contains information such as the ETag or custom headers in the response.
}];

// Note that for cross-region replication, the region used for `transferManager` must be the region of the destination bucket
[[QCloudCOSTransferMangerService defaultCOSTransferManager] CopyObject:request];

// Cancel the copy.
// To cancel the copy operation, call `cancel`
[request cancel];

Note：

For the complete sample, go to GitHub.

Swift

let copyRequest =  QCloudCOSXMLCopyObjectRequest.init();

// Bucket name in the format: `BucketName-APPID`
copyRequest.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
copyRequest.object = "exampleobject";

// Source bucket containing the file; the current account needs to have access permission for the bucket, or the bucket should have public-read permission enabled.
// Bucket name in the format: `BucketName-APPID`
copyRequest.sourceBucket = "sourcebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
copyRequest.sourceObject = "sourceObject";

// APPID of the source file
copyRequest.sourceAPPID = "1250000000";

// Source region
copyRequest.sourceRegion = "COS_REGION";

copyRequest.setFinish { (copyResult, error) in
    if let copyResult = copyResult {
        // ETag of the file
        let eTag = copyResult.eTag
    } else {
        print(error!);
    }

}
// Note that for cross-region replication, the region used for `transferManager` must be the region of the destination bucket
QCloudCOSTransferMangerService.defaultCOSTransferManager().copyObject(copyRequest);

// Cancel the copy.
// To cancel the copy operation, call `cancel`.
copyRequest.cancel();

Note：

For the complete sample, go to GitHub.

Simple Operations

Uploading an object using simple upload

API description

This API (PUT Object) is used to upload an object smaller than 5 GB to a specified bucket. To call this API, you need to have permission to write the bucket. If the object size is larger than 5 GB, please use Multipart Upload or Advanced APIs for the upload.

Note：

The Key (filename) cannot end with /; otherwise, it will be identified as a folder.

Sample code

Objective-C

QCloudPutObjectRequest* put = [QCloudPutObjectRequest new];

// Bucket name in the format: `BucketName-APPID`
put.bucket = @"examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
put.object = @"exampleobject";

// Content of the object. You can pass variables of the NSData* or NSURL* type.
put.body =  [@"testFileContent" dataUsingEncoding:NSUTF8StringEncoding];

[put setFinishBlock:^(id outputObject, NSError *error) {
    // `outputObject` contains all the HTTP response headers
    NSDictionary* info = (NSDictionary *) outputObject;
}];

[[QCloudCOSXMLService defaultCOSXML] PutObject:put];

Note：

• For the complete sample, go to GitHub.
• You can generate a download URL for the uploaded file using the same key. For detailed directions, please see Generating a Pre-Signed Link. Please note that for private-read files, the download URL is only valid for a limited period of time.

Swift

let putObject = QCloudPutObjectRequest<AnyObject>.init();

// Bucket name in the format: `BucketName-APPID`
putObject.bucket = "examplebucket-1250000000";
// Content of the object to be uploaded. You can pass variables of the `NSData*` or `NSURL*` type.
let dataBody:NSData? = "wrwrwrwrwrw".data(using: .utf8) as NSData?;
putObject.body =  dataBody!;

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
putObject.object = "exampleobject";
putObject.finishBlock = {(result,error) in
    if let result = result {
        // "result" contains response headers.
    } else {
        print(error!);
    }
}
QCloudCOSXMLService.defaultCOSXML().putObject(putObject);

Note：

• For the complete sample, go to GitHub.
• You can generate a download URL for the uploaded file using the same key. For detailed directions, please see Generating a Pre-Signed Link. Please note that for private-read files, the download URL is only valid for a limited period of time.

Copying an object (modifying object attributes)

This API (PUT Object-Copy) is used to copy an object to a destination path.

Sample code 1: Copying an object with its attributes preserved

Objective-C

QCloudPutObjectCopyRequest* request = [[QCloudPutObjectCopyRequest alloc] init];
// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";
// Indicates whether to copy metadata. Enumerated values: Copy, Replaced. Default value: Copy
// If set to `Copy`, the user-defined metadata in the header will be ignored and the metadata will be copied directly.
// If it is specified as `Replaced`, the metadata will be modified based on the header information. If the destination path is the same as the source path (i.e., when you want to modify the metadata), it must be specified as `Replaced`
request.metadataDirective = @"Copy";
// Define the ACL attribute of the object. Valid values: private, public-read, default.
// Default value: default (i.e., the object will inherit the bucket's permissions).
// Note: If you do not need ACL for the object, please use default.
// or simply leave it blank, and the object will inherit the permissions of the bucket by default.
request.accessControlList = @"default";
// Path of the source object
request.objectCopySource =
@"sourcebucket-1250000000.cos.ap-guangzhou.myqcloud.com/sourceObject";
// Specify the `versionID` of the source file. This parameter is only returned for buckets whose versioning is enabled or suspended.
request.versionID = @"objectVersion1";
[request setFinishBlock:^(QCloudCopyObjectResult * _Nonnull result,
                          NSError * _Nonnull error) {
    // "result" contains the request result.

}];
[[QCloudCOSXMLService defaultCOSXML]  PutObjectCopy:request];

Note：

For the complete sample, go to GitHub.

Swift

let putObjectCopy = QCloudPutObjectCopyRequest.init();
// Bucket name in the format: `BucketName-APPID`
putObjectCopy.bucket = "examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
putObjectCopy.object = "exampleobject";
// Path of the source object
putObjectCopy.objectCopySource = "sourcebucket-1250000000.cos.ap-guangzhou.myqcloud.com/sourceObject";
// Indicates whether to copy metadata. Enumerated values: Copy, Replaced. Default value: Copy
// If set to `Copy`, the user-defined metadata in the header will be ignored and the metadata will be copied directly.
// If set to `Replaced`, the metadata will be modified based on the header. If the destination path is the same as the source path (i.e., you want to modify the metadata), it must be set to `Replaced`.
putObjectCopy.metadataDirective = "Copy";
// Define the ACL attribute of the object. Valid values: private, public-read, default.
// Default value: default (i.e., the object will inherit the bucket's permissions).
// Note: If you do not need ACL for the object, please use default.
// or simply leave it blank, and the object will inherit the permissions of the bucket by default.
putObjectCopy.accessControlList = "default";
// Specify the `versionID` of the source file. This parameter is only returned for buckets whose versioning is enabled or suspended.
putObjectCopy.versionID = "versionID";
putObjectCopy.setFinish { (result, error) in
    if let result = result {
        let eTag = result.eTag
    } else {
        print(error!);
    }
}
QCloudCOSXMLService.defaultCOSXML().putObjectCopy(putObjectCopy);

Note：

For the complete sample, go to GitHub.

Sample code 2: Copying an object while replacing its attributes

Objective-C

QCloudPutObjectCopyRequest* request = [[QCloudPutObjectCopyRequest alloc] init];
// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";
// Indicates whether to copy metadata. Enumerated values: Copy, Replaced. Default value: Copy
// If set to `Copy`, the user-defined metadata in the header will be ignored and the metadata will be copied directly.
// If set to `Replaced`, the metadata will be modified based on the header. If the destination path is the same as the source path (i.e., you want to modify the metadata), it must be set to `Replaced`.
request.metadataDirective = @"Replaced";
// Modify the metadata
[request.customHeaders setValue:@"newValue" forKey:@"x-cos-meta-*"];
// Object storage class. For the enumerated values, please see Storage Class Overview.
// `STANDARD_IA` and `ARCHIVE`. For the enumerated values, please see the Storage Class documentation. This header will be returned only if the storage class of the file is not `STANDARD`.
// Modify the storage class
[request.customHeaders setValue:@"newValue" forKey:@"x-cos-storage-class"];
// Define the ACL attribute of the object. Valid values: private, public-read, default.
// Default value: default (i.e., the object will inherit the bucket's permissions).
// Note: If you do not need ACL for the object, please use default.
// or simply leave it blank, and the object will inherit the permissions of the bucket by default.
// Modify the ACL
request.accessControlList = @"private";
// Path of the source object
request.objectCopySource =
    @"sourcebucket-1250000000.cos.ap-guangzhou.myqcloud.com/sourceObject";

// Specify the `versionID` of the source file. This parameter is only returned for buckets whose versioning is enabled or suspended.
request.versionID = @"objectVersion1";

[request setFinishBlock:^(QCloudCopyObjectResult * _Nonnull result,
                          NSError * _Nonnull error) {
    // "result" contains the request result.

}];
[[QCloudCOSXMLService defaultCOSXML]  PutObjectCopy:request];

Note：

For the complete sample, go to GitHub.

Swift

let request : QCloudPutObjectCopyRequest  = QCloudPutObjectCopyRequest();
// Bucket name in the format: `BucketName-APPID`
request.bucket = "examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = "exampleobject";
// Indicates whether to copy metadata. Enumerated values: Copy, Replaced. Default value: Copy
// If set to `Copy`, the user-defined metadata in the header will be ignored and the metadata will be copied directly.
// If set to `Replaced`, the metadata will be modified based on the header. If the destination path is the same as the source path (i.e., you want to modify the metadata), it must be set to `Replaced`.
request.metadataDirective = "Replaced";
// Modify the metadata.
request.customHeaders.setValue("newValue", forKey: "x-cos-meta-*");
// Object storage class. For the enumerated values, please see Storage Class Overview.
// `STANDARD_IA` and `ARCHIVE`. For the enumerated values, please see the Storage Class documentation. This header will be returned only if the storage class of the file is not `STANDARD`.
// Modify the storage class.
request.customHeaders.setValue("newValue", forKey: "x-cos-storage-class");
// Define the ACL attribute of the object. Valid values: private, public-read, default.
// Default value: default (i.e., the object will inherit the bucket's permissions).
// Note: If you do not need ACL for the object, please use default.
// or simply leave it blank, and the object will inherit the permissions of the bucket by default.
// Modify the ACL.
request.accessControlList = "Source file ACL";
// Path of the source object
request.objectCopySource = "sourcebucket-1250000000.cos.ap-guangzhou.myqcloud.com/sourceObject";
// Specify the `versionID` of the source file. This parameter is only returned for buckets whose versioning is enabled or suspended.
request.versionID = "versionID";
request.setFinish { (result, error) in
    if let result = result {
        let eTag = result.eTag
    } else {
        print(error!);
    }

}
QCloudCOSXMLService.defaultCOSXML().putObjectCopy(request);

Note：

For the complete sample, go to GitHub.

Sample code 3: Modifying object metadata

Objective-C

QCloudPutObjectCopyRequest* request = [[QCloudPutObjectCopyRequest alloc] init];
// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";
// Indicates whether to copy metadata. Enumerated values: Copy, Replaced. Default value: Copy
// If set to `Copy`, the user-defined metadata in the header will be ignored and the metadata will be copied directly.
// If set to `Replaced`, the metadata will be modified based on the header. If the destination path is the same as the source path (i.e., you want to modify the metadata), it must be set to `Replaced`.
request.metadataDirective = @"Replaced";
// Custom object header
[request.customHeaders setValue:@"newValue" forKey:@"x-cos-meta-*"];
// Define the ACL attribute of the object. Valid values: private, public-read, default.
// Default value: default (i.e., the object will inherit the bucket's permissions).
// Note: If you do not need ACL for the object, please use default.
// or simply leave it blank, and the object will inherit the permissions of the bucket by default.
request.accessControlList = @"default";
// Path of the source object
request.objectCopySource =
    @"examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com/exampleobject";

[request setFinishBlock:^(QCloudCopyObjectResult * _Nonnull result,
                          NSError * _Nonnull error) {
    // "result" contains the request result.

}];
[[QCloudCOSXMLService defaultCOSXML]  PutObjectCopy:request];

Note：

For the complete sample, go to GitHub.

Swift

let request : QCloudPutObjectCopyRequest = QCloudPutObjectCopyRequest();

// Bucket name in the format: `BucketName-APPID`
request.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = "exampleobject";

// Indicates whether to copy metadata. Enumerated values: Copy, Replaced. Default value: Copy
// If this field is specified as `Copy`, the user-defined metadata in the header will be ignored and the object will be copied directly
// If it is specified as `Replaced`, the metadata will be modified based on the header information. If the destination path is the same as the source path
// (i.e., you want to modify the metadata), it must be set to `Replaced`.
request.metadataDirective = "Replaced";

// Custom object header
request.customHeaders.setValue("newValue", forKey: "x-cos-meta-*")

// Define the ACL attribute of the object. Valid values: private, public-read, default.
// Default value: default (i.e., the object will inherit the bucket's permissions).
// Note: If you do not need ACL for the object, please use default.
// or simply leave it blank, and the object will inherit the permissions of the bucket by default.
request.accessControlList = "default";

// Path of the source object
request.objectCopySource =
    "examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com/exampleobject";

request.setFinish { (result, error) in
    if let result = result {
        // ETag of the destination object
        let eTag = result.eTag
    } else {
        print(error!);
    }
}

QCloudCOSXMLService.defaultCOSXML().putObjectCopy(request);

Note：

For the complete sample, go to GitHub.

Sample code 4: Modifying the storage class of an object

Objective-C

QCloudPutObjectCopyRequest* request = [[QCloudPutObjectCopyRequest alloc] init];

// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";

// Object storage class. For the enumerated values, please see Storage Class Overview.
// `STANDARD_IA` and `ARCHIVE`. For the enumerated values, please see the Storage Class documentation. This header will be returned only if the storage class of the file is not `STANDARD`.
[request.customHeaders setValue:@"ARCHIVE" forKey:@"x-cos-storage-class"];

// Path of the source object
request.objectCopySource =
    @"examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com/exampleobject";

// Specify the `versionID` of the source file. This parameter is only returned for buckets where versioning is enabled or suspended
request.versionID = @"";

[request setFinishBlock:^(QCloudCopyObjectResult * _Nonnull result,
                          NSError * _Nonnull error) {
    // "result" contains the request result.

}];
[[QCloudCOSXMLService defaultCOSXML]  PutObjectCopy:request];

Note：

For the complete sample, go to GitHub.

Swift

let request : QCloudPutObjectCopyRequest = QCloudPutObjectCopyRequest();

// Bucket name in the format: `BucketName-APPID`
request.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = "exampleobject";

// Object storage class. For the enumerated values, please see Storage Class Overview.
// `STANDARD_IA` and `ARCHIVE`. For the enumerated values, please see the Storage Class documentation. This header will be returned only if the storage class of the file is not `STANDARD`.
request.customHeaders.setValue("newValue", forKey: "x-cos-storage-class");
// Path of the source object
request.objectCopySource =
    "examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com/exampleobject";

request.setFinish { (result, error) in
    if let result = result {
        // ETag of the destination object
        let eTag = result.eTag
    } else {
        print(error!);
    }
}

QCloudCOSXMLService.defaultCOSXML().putObjectCopy(request);

Note：

For the complete sample, go to GitHub.

Multipart Operations

The multipart upload process is outlined below.

Multipart upload/copy process

1. Initialize the multipart upload with Initiate Multipart Upload and get the UploadId.
2. Use the UploadId to upload parts with Upload Part or copy parts with Upload Part Copy
3. Complete the multipart upload with Complete Multipart Upload.

How to resume a multipart upload/copy operation

1. If you did not record the UploadId of the multipart upload, you can query the multipart upload job with List Multipart Uploads to get the UploadId of the corresponding file.
2. Use the UploadId to list the uploaded parts with List Parts.
3. Use the UploadId to upload the remaining parts with Upload Part or copy the remaining parts with Upload Part Copy.
4. Complete the multipart upload with Complete Multipart Upload.

Multipart upload/copy termination process

1. If you did not record the UploadId of the multipart upload, you can query the multipart upload job with List Multipart Uploads to get the UploadId of the corresponding file.
2. Abort the multipart upload and delete the uploaded parts with Abort Multipart Upload.

Querying multipart uploads

API description

This API (List Multipart Uploads) is used to query the ongoing multipart uploads in a bucket.

Sample code

Objective-C

QCloudListBucketMultipartUploadsRequest* uploads = [QCloudListBucketMultipartUploadsRequest new];
// Bucket name in the format: `BucketName-APPID`
uploads.bucket = @"examplebucket-1250000000";
// Set the maximum number of multiparts to be returned. Valid value: 1–1000
uploads.maxUploads = 100;
[uploads setFinishBlock:^(QCloudListMultipartUploadsResult* result,
                          NSError *error) {
    // Get the information on in-progress multipart uploads from `result`
    // Object in the ongoing multipart upload
    NSArray<QCloudListMultipartUploadContent*> *uploads = result.uploads;
}];
[[QCloudCOSXMLService defaultCOSXML] ListBucketMultipartUploads:uploads];

Note：

For the complete sample, go to GitHub.

Swift

let listParts = QCloudListBucketMultipartUploadsRequest.init();

// Bucket name in the format: `BucketName-APPID`
listParts.bucket = "examplebucket-1250000000";

// Set the maximum number of multiparts to be returned. Valid value: 1–1000
listParts.maxUploads = 100;

listParts.setFinish { (result, error) in
    if let result = result {
        // List all unfinished multipart uploads.
        let uploads = result.uploads;
    } else {
        print(error!);
    }
}
QCloudCOSXMLService.defaultCOSXML().listBucketMultipartUploads(listParts);

Note：

For the complete sample, go to GitHub.

Initializing a multipart upload

API description

This API (Initiate Multipart Upload) is used to initialize a multipart upload operation and get its UploadID.

Sample code

Objective-C

QCloudInitiateMultipartUploadRequest* initRequest = [QCloudInitiateMultipartUploadRequest new];
// Bucket name in the format: `BucketName-APPID`
initRequest.bucket = @"examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
initRequest.object = @"exampleobject";
// This will be returned as object metadata
initRequest.cacheControl = @"cacheControl";
initRequest.contentDisposition = @"contentDisposition";
// Define the ACL attribute of the object. Valid values: private (default), public-read-write, public-read
initRequest.accessControlList = @"public";
// Grant read permission.
initRequest.grantRead = @"grantRead";
// Grant write permission.
initRequest.grantWrite = @"grantWrite";
// Grant read and write permission; grantFullControl = grantWrite + grantRead
initRequest.grantFullControl = @"grantFullControl";
[initRequest setFinishBlock:^(QCloudInitiateMultipartUploadResult* outputObject,
                              NSError *error) {
    // Get the `uploadId` of the multipart upload. This ID is required for subsequent uploads. Please save it for future use.
    self->uploadId = outputObject.uploadId;

}];

[[QCloudCOSXMLService defaultCOSXML] InitiateMultipartUpload:initRequest];

Note：

For the complete sample, go to GitHub.

Swift

let initRequest = QCloudInitiateMultipartUploadRequest.init();

// Bucket name in the format: `BucketName-APPID`
initRequest.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
initRequest.object = "exampleobject";

initRequest.setFinish { (result, error) in
    if let result = result {
        // Get the `uploadId` of the multipart upload. This ID is required for subsequent uploads. Please save it for future use.
        self.uploadId = result.uploadId;
    } else {
        print(error!);
    }
}
QCloudCOSXMLService.defaultCOSXML().initiateMultipartUpload(initRequest);

Note：

For the complete sample, go to GitHub.

Uploading a part

This API (Upload Part) is used to upload parts in a multipart upload.

Sample code

Objective-C

QCloudUploadPartRequest* request = [QCloudUploadPartRequest new];
// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";
// Part number
request.partNumber = 1;
// The ID of the multipart upload. When you use the `Initiate Multipart Upload` API to initialize a multipart upload, you will get an `uploadId`
request.uploadId = uploadId;
// Uploaded data. NSData *, NSURL (local URL), and QCloudFileOffsetBody * are supported.
request.body = [@"testFileContent" dataUsingEncoding:NSUTF8StringEncoding];
[request setSendProcessBlock:^(int64_t bytesSent,
                               int64_t totalBytesSent,
                               int64_t totalBytesExpectedToSend) {
    // Upload progress
    // bytesSent                   Number of new bytes sent
    // totalBytesSent              Total number of bytes sent in the upload
    // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload
}];
[request setFinishBlock:^(QCloudUploadPartResult* outputObject, NSError *error) {
    QCloudMultipartInfo *part = [QCloudMultipartInfo new];
    // Get the ETag of the uploaded part.
    part.eTag = outputObject.eTag;
    part.partNumber = @"1";
    // Save it for future use after the upload is complete
    self.parts = @[part];

}];

[[QCloudCOSXMLService defaultCOSXML]  UploadPart:request];

Note：

For the complete sample, go to GitHub.

Swift

let uploadPart = QCloudUploadPartRequest<AnyObject>.init();

// Bucket name in the format: `BucketName-APPID`
uploadPart.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
uploadPart.object = "exampleobject";
uploadPart.partNumber = 1;

// ID of the multipart upload
if let uploadId = self.uploadId {
    uploadPart.uploadId = uploadId;
}

// Example file
let dataBody:NSData? = "wrwrwrwrwrwwrwrwrwrwrwwwrwrw"
    .data(using: .utf8) as NSData?;

uploadPart.body = dataBody!;
uploadPart.setFinish { (result, error) in
    if let result = result {
        let mutipartInfo = QCloudMultipartInfo.init();
        // Get the ETag of the part.
        mutipartInfo.eTag = result.eTag;
        mutipartInfo.partNumber = "1";
        // Save it for completing the upload.
        self.parts = [mutipartInfo];
    } else {
        print(error!);
    }
}
uploadPart.sendProcessBlock = {(bytesSent,totalBytesSent,
                                totalBytesExpectedToSend) in
    // Upload progress
    // bytesSent                   Number of new bytes sent
    // totalBytesSent              Total number of bytes sent in the upload
    // totalBytesExpectedToSend    Target number of bytes expected to be sent in the upload

}
QCloudCOSXMLService.defaultCOSXML().uploadPart(uploadPart);

Note：

For the complete sample, go to GitHub.

Copying a part

API description

This API (Upload Part-Copy) is used to copy an object as a part.

Sample code

Objective-C

QCloudUploadPartCopyRequest* request = [[QCloudUploadPartCopyRequest alloc] init];

// Bucket name in the format: `BucketName-APPID`
request.bucket = @"examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";

// URL path of the source file. A previous version can be specified by using the `versionid` subresource.
request.source = @"sourcebucket-1250000000.cos.ap-guangzhou.myqcloud.com/sourceObject";

// The Initiate Multipart Upload request returns an upload ID used to uniquely identify the upload.
request.uploadID = uploadId;

// Number that identifies the part
request.partNumber = 1;

[request setFinishBlock:^(QCloudCopyObjectResult* result, NSError* error) {
    QCloudMultipartInfo *part = [QCloudMultipartInfo new];

    // Get the ETag of the copied part.
    part.eTag = result.eTag;
    part.partNumber = @"1";
    // Save it for future use after the upload is complete
    self.parts=@[part];

}];

[[QCloudCOSXMLService defaultCOSXML]UploadPartCopy:request];

Note：

For the complete sample, go to GitHub.

Swift

let req = QCloudUploadPartCopyRequest.init();

// Bucket name in the format: `BucketName-APPID`
req.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
req.object = "exampleobject";

// URL path of the source file. A previous version can be specified by using the `versionid` subresource.
req.source = "sourcebucket-1250000000.cos.ap-guangzhou.myqcloud.com/sourceObject";
// The Initiate Multipart Upload request returns an upload ID used to uniquely identify the upload.
if let uploadId = self.uploadId {
    req.uploadID = uploadId;
}

// Number that identifies the part
req.partNumber = 1;
req.setFinish { (result, error) in
    if let result = result {
        let mutipartInfo = QCloudMultipartInfo.init();
        // Get the ETag of the copied part.
        mutipartInfo.eTag = result.eTag;
        mutipartInfo.partNumber = "1";
        // Save it for completing the upload.
        self.parts = [mutipartInfo];
    } else {
        print(error!);
    }
}
QCloudCOSXMLService.defaultCOSXML().uploadPartCopy(req);

Note：

For the complete sample, go to GitHub.

Querying uploaded parts

API description

This API (List Parts) is used to query the uploaded parts of a multipart upload.

Sample code

Objective-C

QCloudListMultipartRequest* request = [QCloudListMultipartRequest new];

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
request.object = @"exampleobject";

// Bucket name in the format: BucketName-APPID
request.bucket = @"examplebucket-1250000000";

// The Initiate Multipart Upload request returns an upload ID used to uniquely identify the upload.
request.uploadId = uploadId;

[request setFinishBlock:^(QCloudListPartsResult * _Nonnull result,
                          NSError * _Nonnull error) {

    // Get the information on uploaded parts from `result`
    // Information on each part
    NSArray<QCloudMultipartUploadPart*> *parts = result.parts;
}];

[[QCloudCOSXMLService defaultCOSXML] ListMultipart:request];

Note：

For the complete sample, go to GitHub.

Swift

let req = QCloudListMultipartRequest.init();

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
req.object = "exampleobject";

// Bucket name in the format: `BucketName-APPID`
req.bucket = "examplebucket-1250000000";

// The Initiate Multipart Upload request returns an upload ID used to uniquely identify the upload.
if let uploadId = self.uploadId {
    req.uploadId = uploadId;
}
req.setFinish { (result, error) in
    if let result = result {
        // All uploaded parts
        let parts = result.parts
    } else {
        print(error!);
    }
}

QCloudCOSXMLService.defaultCOSXML().listMultipart(req);

Note：

For the complete sample, go to GitHub.

Completing a multipart upload

API description

This API (Complete Multipart Upload) is used to complete the multipart upload of an entire file.

Sample code

Objective-C

QCloudCompleteMultipartUploadRequest *completeRequst = [QCloudCompleteMultipartUploadRequest new];
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
completeRequst.object = @"exampleobject";
// Bucket name in the format: `BucketName-APPID`
completeRequst.bucket = @"examplebucket-1250000000";
// `uploadId` of the multipart upload to be queried. This ID can be obtained from `QCloudInitiateMultipartUploadResult`, i.e. the result of the multipart upload initialization request
completeRequst.uploadId = uploadId;
// Information on the uploaded parts
QCloudCompleteMultipartUploadInfo *partInfo = [QCloudCompleteMultipartUploadInfo new];
NSMutableArray * parts = [self.parts mutableCopy];
// Sort the uploaded parts.
[parts sortUsingComparator:^NSComparisonResult(QCloudMultipartInfo*  _Nonnull obj1,
                                               QCloudMultipartInfo*  _Nonnull obj2) {
    int a = obj1.partNumber.intValue;
    int b = obj2.partNumber.intValue;

    if (a < b) {
        return NSOrderedAscending;
    } else {
        return NSOrderedDescending;
    }
}];
partInfo.parts = [parts copy];
completeRequst.parts = partInfo;

[completeRequst setFinishBlock:^(QCloudUploadObjectResult * _Nonnull result,
                                 NSError * _Nonnull error) {
    // Get the upload result from "result".
}];

[[QCloudCOSXMLService defaultCOSXML] CompleteMultipartUpload:completeRequst];

Note：

For the complete sample, go to GitHub.

Swift

let  complete = QCloudCompleteMultipartUploadRequest.init();

// Bucket name in the format: `BucketName-APPID`
complete.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
complete.object = "exampleobject";

// `uploadId` of the multipart upload to be queried. This ID can be obtained from
// `QCloudInitiateMultipartUploadResult`, i.e., the result of the multipart upload initialization request
complete.uploadId = "exampleUploadId";
if let uploadId = self.uploadId {
    complete.uploadId = uploadId;
}

// Information on the uploaded parts
let completeInfo = QCloudCompleteMultipartUploadInfo.init();
if self.parts == nil {
    print ("parts that have not completed yet");
    return;
}
if self.parts != nil {
    completeInfo.parts = self.parts ?? [];
}

complete.parts = completeInfo;
complete.setFinish { (result, error) in
    if let result = result {
        // ETag of the file
        let eTag = result.eTag
        // Unsigned file URL
        let location = result.location
    } else {
        print(error!);
    }
}
QCloudCOSXMLService.defaultCOSXML().completeMultipartUpload(complete);

Note：

For the complete sample, go to GitHub.

Aborting a multipart upload

API description

This API (Abort Multipart Upload) is used to abort a multipart upload and delete the uploaded parts.

Sample code

Objective-C

QCloudAbortMultipfartUploadRequest *abortRequest = [QCloudAbortMultipfartUploadRequest new];
// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
abortRequest.object = @"exampleobject";
// Bucket name in the format: `BucketName-APPID`
abortRequest.bucket = @"examplebucket-1250000000";
// `uploadId` of the multipart upload to be aborted.
// This ID can be obtained from `QCloudInitiateMultipartUploadResult`, i.e. the result of the multipart upload initialization request
abortRequest.uploadId = @"exampleUploadId";
[abortRequest setFinishBlock:^(id outputObject, NSError *error) {
    // outputObject returns information such as the Etag or custom headers in the response 
    NSDictionary * result = (NSDictionary *)outputObject;
}];
[[QCloudCOSXMLService defaultCOSXML]AbortMultipfartUpload:abortRequest];

Note：

For the complete sample, go to GitHub.

Swift

let abort = QCloudAbortMultipfartUploadRequest.init();

// Bucket name in the format: `BucketName-APPID`
abort.bucket = "examplebucket-1250000000";

// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "dir1/object1".
abort.object = "exampleobject";

// `uploadId` of the multipart upload to be queried. This ID can be obtained from
// `QCloudInitiateMultipartUploadResult`, i.e., the result of the multipart upload initialization request
abort.uploadId = self.uploadId!;

abort.finishBlock = {(result,error)in
    if let result = result {
        // You can get the header information returned by the server from `result`
    } else {
        print(error!)
    }
}
QCloudCOSXMLService.defaultCOSXML().abortMultipfartUpload(abort);

Note：

For the complete sample, go to GitHub.