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Uploading Objects

Last updated: 2024-01-24 15:32:05

    Product Introduction

    This document provides an overview of APIs and SDK code samples for uploading objects.
    Simple operations
    API
    Operation
    Description
    Uploading an object
    Uploads an object to a bucket.
    Multipart operations
    API
    Operation
    Description
    Querying multipart uploads
    Queries in-progress multipart uploads.
    Initializing a multipart upload operation
    Initializes a multipart upload operation.
    Uploading parts
    Uploads an object in multiple parts.
    Querying uploaded parts
    Queries the uploaded parts of a multipart upload.
    Completing a multipart upload
    Completes the multipart upload of a file.
    Aborting a multipart upload
    Aborts a multipart upload and deletes the uploaded parts.

    SDK API References

    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 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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 bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    }];
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * fileUrl = result.location;
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    [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, see Generating Pre-Signed URLs. 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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
    // File download link
    let location = result.location;
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    
    // Monitor the upload progress
    put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    };
    // 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, see Generating Pre-Signed URLs. Please note that for private-read files, the download URL is only valid for a limited period of time.

    Sample 2. Uploading binary data

    Objective-C
    QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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 so far
    // totalBytesExpectedToSend Target number of bytes expected to send
    }];
    
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * fileUrl = result.location;
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    [[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, see Generating Pre-Signed URLs. 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = "exampleobject";
    
    // Content of the object to upload
    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
    
    // File download link
    let location = result.location;
    
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } 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 so far
    // totalBytesExpectedToSend Target number of bytes expected to send
    };
    
    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, see Generating Pre-Signed URLs. 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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 bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    }];
    
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * fileUrl = result.location;
    
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    [[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];
    }
    Swift
    for i in 1...10 {
    let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = "exampleobject-".appendingFormat("%d", i);
    
    // Content of the object to upload
    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
    
    // File download link
    let location = result.location;
    
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    
    // Monitor the upload progress
    put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in
    
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    };
    
    QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);
    }

    Sample code 5. Customizing the threshold to trigger multipart upload

    Objective-C
    for (int i = 0; i<20; i++) {
    QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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];
    // Customize the threshold to trigger multipart upload. By default, multipart upload is triggered when the file size is greater than 1 MB
    put.mutilThreshold = 10 *1024*1024;
    // Monitor the upload progress
    [put setSendProcessBlock:^(int64_t bytesSent,
    int64_t totalBytesSent,
    int64_t totalBytesExpectedToSend) {
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    }];
    
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * location = result.location;
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    [[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];
    }
    Swift
    for i in 1...10 {
    let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = "exampleobject-".appendingFormat("%d", i);
    
    // Content of the object to upload
    let dataBody:NSData = "wrwrwrwrwrw".data(using: .utf8)! as NSData;
    put.body = dataBody;
    // Customize the threshold to trigger multipart upload. By default, multipart upload is triggered when the file size is greater than 1 MB
    put.mutilThreshold = 10 *1024*1024;
    // 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
    // File download link
    let location = result.location;
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    
    // Monitor the upload progress
    put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in
    
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    };
    
    QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);
    }

    Sample code 6. Customizing the part size

    Objective-C
    for (int i = 0; i<20; i++) {
    QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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];
    // Customize the part size. Default value: 1 MB
    put.sliceSize = 10 *1024*1024;
    // Monitor the upload progress
    [put setSendProcessBlock:^(int64_t bytesSent,
    int64_t totalBytesSent,
    int64_t totalBytesExpectedToSend) {
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    }];
    
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * location = result.location;
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    [[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];
    }
    Swift
    for i in 1...10 {
    let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = "exampleobject-".appendingFormat("%d", i);
    
    // Content of the object to upload
    let dataBody:NSData = "wrwrwrwrwrw".data(using: .utf8)! as NSData;
    put.body = dataBody;
    // Customize the part size. Default value: 1 MB
    put.sliceSize = 10 *1024*1024
    // 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
    
    // File download link
    let location = result.location;
    
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    
    // Monitor the upload progress
    put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    };
    
    QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);
    }

    Sample code 7. Limiting the upload speed

    Note:
    COS iOS SDK v5.8.0 or later is required.
    Objective-C
    QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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];
    
    // Use `trafficLimit` to limit the upload speed, in bit/s. The speed range is 819200 to 838860800, that is, 100 KB/s to 100 MB/s.
    put.trafficLimit = 819200;
    // Monitor the upload progress
    [put setSendProcessBlock:^(int64_t bytesSent,
    int64_t totalBytesSent,
    int64_t totalBytesExpectedToSend) {
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    }];
    
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * location = result.location;
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    [[QCloudCOSTransferMangerService defaultCOSTransferManager] UploadObject:put];
    
    Swift
    
    let put:QCloudCOSXMLUploadObjectRequest = QCloudCOSXMLUploadObjectRequest<AnyObject>();
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = "exampleobject-".appendingFormat("%d", i);
    
    // Content of the object to upload
    let dataBody:NSData = "wrwrwrwrwrw".data(using: .utf8)! as NSData;
    put.body = dataBody;
    // Use `trafficLimit` to limit the upload speed, in bit/s. The speed range is 819200 to 838860800, that is, 100 KB/s to 100 MB/s.
    put.trafficLimit = 819200;
    // 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
    
    // File download link
    let location = result.location;
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    
    // Monitor the upload progress
    put.sendProcessBlock = { (bytesSent, totalBytesSent,
    totalBytesExpectedToSend) in
    // bytesSent Number of bytes to send in this request (a large file may require multiple requests)
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Total number of bytes expected to send, i.e. the size of the file
    };
    
    QCloudCOSTransferMangerService.defaultCOSTransferManager().uploadObject(put);
    

    Sample code 8. Creating a directory

    Objective-C
    QCloudCOSXMLUploadObjectRequest* put = [QCloudCOSXMLUploadObjectRequest new];
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    put.bucket = @"examplebucket-1250000000";
    // Name of the directory to create
    put.object = @"dir1";
    
    // Content of the object to be uploaded. If you need to create a directory, you only need to use a null string to generate `NSData`
    put.body = [@"" dataUsingEncoding:NSUTF8StringEncoding];
    
    // Monitor the upload result
    [put setFinishBlock:^(QCloudUploadObjectResult *result, NSError *error) {
    // Obtain the download link of the file uploaded using result.location
    NSString * location = result.location;
    }];
    [[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, see Generating Pre-Signed URLs. 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = "dir/";
    
    // Content of the object to upload
    let dataBody:NSData = "".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 {
    // File download link
    let location = result.location;
    
    } else {
    print(error!);
    }
    }
    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, see Generating Pre-Signed URLs. Please note that for private-read files, the download URL is only valid for a limited period of time.

    Simple Operations

    Uploading an object using simple upload

    Feature 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 to 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    put.object = @"exampleobject";
    
    // Content of the object. You can pass in variables in `NSData*` or `NSURL*` format.
    put.body = [@"testFileContent" dataUsingEncoding:NSUTF8StringEncoding];
    
    [put setFinishBlock:^(id result, NSError *error) {
    // result contains response headers.
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    
    [[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, see Generating Pre-Signed URLs. 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    putObject.object = "exampleobject";
    putObject.finishBlock = {(result,error) in
    if let result = result {
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } 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, see Generating Pre-Signed URLs. Please note that for private-read files, the download URL is only valid for a limited period of time.

    Multipart Operations

    The multipart upload process is outlined below.

    Performing a multipart upload

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

    Resuming a multipart upload

    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.
    4. Complete the multipart upload with Complete Multipart Upload.

    Aborting a multipart upload

    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

    Feature description

    This API (List Multipart Uploads) is used to query in-progress multipart uploads in a specified bucket.

    Sample code

    Objective-C
    QCloudListBucketMultipartUploadsRequest* uploads = [QCloudListBucketMultipartUploadsRequest new];
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    uploads.bucket = @"examplebucket-1250000000";
    // Set the maximum number of parts to return. Value range: 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    listParts.bucket = "examplebucket-1250000000";
    
    // Set the maximum number of parts to return. Value range: 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

    Feature description

    This API 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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 full permissions to the grantee.
    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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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 parts

    This API (Upload Part) is used to upload an object in parts.

    Sample code

    Objective-C
    QCloudUploadPartRequest* request = [QCloudUploadPartRequest new];
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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 so far
    // totalBytesExpectedToSend Target number of bytes expected to send
    }];
    [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];
    // Obtain the CRC64 value of the object.
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    
    }];
    
    [[QCloudCOSXMLService defaultCOSXML] UploadPart:request];
    Note:
    For the complete sample, go to GitHub.
    Swift
    let uploadPart = QCloudUploadPartRequest<AnyObject>.init();
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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];
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    uploadPart.sendProcessBlock = {(bytesSent,totalBytesSent,
    totalBytesExpectedToSend) in
    // Upload progress
    // bytesSent Number of new bytes sent
    // totalBytesSent Total number of bytes sent so far
    // totalBytesExpectedToSend Target number of bytes expected to send
    
    }
    QCloudCOSXMLService.defaultCOSXML().uploadPart(uploadPart);
    Note:
    For the complete sample, go to GitHub.

    Querying uploaded parts

    Feature 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 "video/xxx/movie.mp4"
    request.object = @"exampleobject";
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    request.bucket = @"examplebucket-1250000000";
    
    // The Initiate Multipart Upload request returns an upload ID that uniquely identifies 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 "video/xxx/movie.mp4"
    req.object = "exampleobject";
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    req.bucket = "examplebucket-1250000000";
    
    // The Initiate Multipart Upload request returns an upload ID that uniquely identifies 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

    Feature description

    This API (Complete Multipart Upload) is used to complete the multipart upload of a 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 "video/xxx/movie.mp4"
    completeRequst.object = @"exampleobject";
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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
    // Obtain the CRC64 value of the object
    NSString * crc64 = [[outputObject __originHTTPURLResponse__].allHeaderFields valueForKey:@"x-cos-hash-crc64ecma"];
    }];
    
    [[QCloudCOSXMLService defaultCOSXML] CompleteMultipartUpload:completeRequst];
    Note:
    For the complete sample, go to GitHub.
    Swift
    let complete = QCloudCompleteMultipartUploadRequest.init();
    
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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
    
    // Obtain the CRC64 value of the object.
    let crc64 = result?.__originHTTPURLResponse__.allHeaderFields["x-cos-hash-crc64ecma"];
    } else {
    print(error!);
    }
    }
    QCloudCOSXMLService.defaultCOSXML().completeMultipartUpload(complete);
    Note:
    For the complete sample, go to GitHub.

    Aborting a multipart upload

    Feature 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 "video/xxx/movie.mp4"
    abortRequest.object = @"exampleobject";
    // Bucket name in the format of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 contains 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 of BucketName-APPID, which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket
    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 "video/xxx/movie.mp4"
    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.
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