S3 Class

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The S3 class provides an easy-to-use interface for Amazon S3 and other S3-compatible services.

Syntax

S3

Remarks

The S3 class allows you to access Amazon's Simple Storage Service (S3), as well as other S3-compatible services, in a secure manner using Secure Sockets Layer/Transport Layer Security (TLS/SSL). S3-like services allow you to store arbitrary data objects in various buckets and to access them from anywhere with an internet connection.

A brief synopsis follows, but please refer to Amazon's S3 documentation for more information about the general capabilities of S3.

S3 supports the following providers:

• Amazon S3
• Backblaze B2
• Cloudflare R2
• Digital Ocean Spaces
• Google Cloud Storage
• IBM Cloud Object Storage
• Linode Object Storage
• Oort DSS
• Oracle Cloud Object Storage
• Seagate Lyve Cloud
• Wasabi
• And more!

A "custom provider" option also allows you to interact with any S3-compatible API by specifying its base URL.

Getting Started

To begin, use the ServiceProvider property to select the S3 service provider to use. Then, use the AccessKey and SecretKey properties to specify the access key and secret key that the class should use to sign requests. These keys can be obtained after signing up for an account with the selected service provider.

Working with Buckets

S3 services store objects in various buckets. The following methods can be used to interact with the buckets in an S3 account:

• Creating and deleting buckets: CreateBucket and DeleteBucket
• Checking whether a bucket exists, and its location: BucketExists and GetBucketLocation
• Listing buckets: ListBuckets
• Updating a bucket's canned ACL: UpdateBucketACL

Working with Objects

Once the desired buckets are ready, the following methods can be used to interact with objects:

• Creating, downloading, and deleting objects: CreateObject, GetObject, DeleteObject
• Copying objects: CopyObject
• Listing objects, or getting information about a single object: ListObjects, GetObjectInfo
• Updating an object's canned ACL: UpdateObjectACL

Working with Multipart Uploads

For S3 providers that support them, multipart uploads make it possible to upload very large objects in multiple parts.

• Starting, completing, and aborting multipart uploads: StartMultipartUpload, CompleteMultipartUpload, AbortMultipartUpload
• Listing multipart uploads: ListMultipartUploads
• Uploading and copying parts: UploadPart, CopyPart
• Listing parts: ListParts

Cloudflare R2 Notes

The Cloudflare R2 service provider possesses the following unique requirements and characteristics:

• In addition to needing an AccessKey and SecretKey, a CloudflareAccountID is also required to work with this provider.
• The Region property is automatically set to "auto" when this service provider is selected, which is the only valid value.
• ListParts is not supported natively by Cloudflare R2, which means that the behavior of CompleteMultipartUpload changes when using this provider. Instead, calling UploadPart or CopyPart populates the LastPartInfo and PartInfo[i] configuration settings. CompleteMultipartUpload will then use the values in PartInfo[i] to complete the multipart upload.

Other Features

The S3 class also supports a variety of other features, including the following:

• Versioning support
• Object metadata manipulation
• Presigned link generation

Property List

The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the class with short descriptions. Click on the links for further details.

AccessKey Property (S3 Class)

This property includes the access key to use for authentication.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetAccessKey();
int SetAccessKey(const char* lpszAccessKey);

Unicode (Windows)
LPWSTR GetAccessKey();
INT SetAccessKey(LPCWSTR lpszAccessKey);

char* cloudstorage_s3_getaccesskey(void* lpObj);
int cloudstorage_s3_setaccesskey(void* lpObj, const char* lpszAccessKey);

QString GetAccessKey();
int SetAccessKey(QString qsAccessKey);

Default Value

""

Remarks

This property specifies the access key that should be used for authentication. Both this property and SecretKey must be set before attempting any operations that connect to the server.

Data Type

String

AccessPolicy Property (S3 Class)

This property includes the canned access policy to apply to a bucket or object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetAccessPolicy();
int SetAccessPolicy(int iAccessPolicy);

Unicode (Windows)
INT GetAccessPolicy();
INT SetAccessPolicy(INT iAccessPolicy);

PT_PRIVATE(0), 
PT_PUBLIC_READ(1), 
PT_PUBLIC_READ_WRITE(2), 
PT_AUTHENTICATED_READ(3), 
PT_BUCKET_OWNER_READ(4), 
PT_BUCKET_OWNER_FULL_CONTROL(5), 
PT_NONE(6)

int cloudstorage_s3_getaccesspolicy(void* lpObj);
int cloudstorage_s3_setaccesspolicy(void* lpObj, int iAccessPolicy);

int GetAccessPolicy();
int SetAccessPolicy(int iAccessPolicy);

Default Value

0

Remarks

This property specifies the canned access policy that should be applied to a bucket or object when one of the following methods is called:

• CopyObject (for the destination object)
• CreateBucket
• CreateObject
• StartMultipartUpload
• UpdateBucketACL
• UpdateObjectACL

The valid values are as follows:

Note: Most S3-compatible service providers support all of the canned access policies listed above, but some do not, or they have additional restrictions. Refer to the provider's documentation for more information.

Data Type

Integer

Bucket Property (S3 Class)

This property selects a bucket.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetBucket();
int SetBucket(const char* lpszBucket);

Unicode (Windows)
LPWSTR GetBucket();
INT SetBucket(LPCWSTR lpszBucket);

char* cloudstorage_s3_getbucket(void* lpObj);
int cloudstorage_s3_setbucket(void* lpObj, const char* lpszBucket);

QString GetBucket();
int SetBucket(QString qsBucket);

Default Value

""

Remarks

This property selects a bucket, by name, for the class to operate against. It must be set before attempting most operations.

Data Type

String

BucketsCount Property (S3 Class)

The number of records in the Buckets arrays.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetBucketsCount();

Unicode (Windows)
INT GetBucketsCount();

int cloudstorage_s3_getbucketscount(void* lpObj);

int GetBucketsCount();

Default Value

0

Remarks

This property controls the size of the following arrays:

• BucketsCreationDate
• BucketsName
• BucketsOwnerDisplayName
• BucketsOwnerId

The array indices start at 0 and end at BucketsCount - 1.

This property is read-only and not available at design time.

Data Type

Integer

BucketsCreationDate Property (S3 Class)

The property includes the creation date of the bucket.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetBucketsCreationDate(int iBucketsIndex);

Unicode (Windows)
LPWSTR GetBucketsCreationDate(INT iBucketsIndex);

char* cloudstorage_s3_getbucketscreationdate(void* lpObj, int bucketsindex);

QString GetBucketsCreationDate(int iBucketsIndex);

Default Value

""

Remarks

The property includes the creation date of the bucket.

This property reflects the creation date of the bucket.

The BucketsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the BucketsCount property.

This property is read-only and not available at design time.

Data Type

String

BucketsName Property (S3 Class)

The property contains the name of the bucket.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetBucketsName(int iBucketsIndex);

Unicode (Windows)
LPWSTR GetBucketsName(INT iBucketsIndex);

char* cloudstorage_s3_getbucketsname(void* lpObj, int bucketsindex);

QString GetBucketsName(int iBucketsIndex);

Default Value

""

Remarks

The property contains the name of the bucket.

This property reflects the name of the bucket.

The BucketsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the BucketsCount property.

This property is read-only and not available at design time.

Data Type

String

BucketsOwnerDisplayName Property (S3 Class)

The property contains the display name of the bucket's owner.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetBucketsOwnerDisplayName(int iBucketsIndex);

Unicode (Windows)
LPWSTR GetBucketsOwnerDisplayName(INT iBucketsIndex);

char* cloudstorage_s3_getbucketsownerdisplayname(void* lpObj, int bucketsindex);

QString GetBucketsOwnerDisplayName(int iBucketsIndex);

Default Value

""

Remarks

The property contains the display name of the bucket's owner.

This property reflects the display name of the bucket's owner.

The BucketsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the BucketsCount property.

This property is read-only and not available at design time.

Data Type

String

BucketsOwnerId Property (S3 Class)

The property contains the Id of the bucket's owner.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetBucketsOwnerId(int iBucketsIndex);

Unicode (Windows)
LPWSTR GetBucketsOwnerId(INT iBucketsIndex);

char* cloudstorage_s3_getbucketsownerid(void* lpObj, int bucketsindex);

QString GetBucketsOwnerId(int iBucketsIndex);

Default Value

""

Remarks

The property contains the Id of the bucket's owner.

This property reflects the Id of the bucket's owner.

The BucketsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the BucketsCount property.

This property is read-only and not available at design time.

Data Type

String

ContentDisposition Property (S3 Class)

This property includes content disposition to send for an object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetContentDisposition();
int SetContentDisposition(const char* lpszContentDisposition);

Unicode (Windows)
LPWSTR GetContentDisposition();
INT SetContentDisposition(LPCWSTR lpszContentDisposition);

char* cloudstorage_s3_getcontentdisposition(void* lpObj);
int cloudstorage_s3_setcontentdisposition(void* lpObj, const char* lpszContentDisposition);

QString GetContentDisposition();
int SetContentDisposition(QString qsContentDisposition);

Default Value

""

Remarks

This property can be set before calling CreateObject to have its value submitted as the object's Content-Disposition header value. This same value will then be returned in the Content-Disposition header by the server any time the object is downloaded.

This property is not available at design time.

Data Type

String

ContentType Property (S3 Class)

This property includes the content type to send for an object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetContentType();
int SetContentType(const char* lpszContentType);

Unicode (Windows)
LPWSTR GetContentType();
INT SetContentType(LPCWSTR lpszContentType);

char* cloudstorage_s3_getcontenttype(void* lpObj);
int cloudstorage_s3_setcontenttype(void* lpObj, const char* lpszContentType);

QString GetContentType();
int SetContentType(QString qsContentType);

Default Value

""

Remarks

This property can be set before calling CreateObject to have its value submitted as the object's Content-Type header value. This same value will then be returned in the Content-Type header by the server any time the object is downloaded.

This property is not available at design time.

Data Type

String

EncryptionAlgorithm Property (S3 Class)

This property includes the encryption algorithm.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetEncryptionAlgorithm();
int SetEncryptionAlgorithm(int iEncryptionAlgorithm);

Unicode (Windows)
INT GetEncryptionAlgorithm();
INT SetEncryptionAlgorithm(INT iEncryptionAlgorithm);

EA_AES(0), 
EA_BLOWFISH(1), 
EA_CAST(2), 
EA_DES(3), 
EA_IDEA(4), 
EA_RC2(5), 
EA_RC4(6), 
EA_TEA(7), 
EA_TRIPLE_DES(8), 
EA_TWOFISH(9), 
EA_RIJNDAEL(10), 
EA_CHA_CHA(11), 
EA_XSALSA_20(12)

int cloudstorage_s3_getencryptionalgorithm(void* lpObj);
int cloudstorage_s3_setencryptionalgorithm(void* lpObj, int iEncryptionAlgorithm);

int GetEncryptionAlgorithm();
int SetEncryptionAlgorithm(int iEncryptionAlgorithm);

Default Value

0

Remarks

This property specifies the encryption algorithm to be used. The maximum allowable key size is automatically used for the selected algorithm. Possible values are as follows:

Data Type

Integer

EncryptionPassword Property (S3 Class)

This property includes the encryption password.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetEncryptionPassword();
int SetEncryptionPassword(const char* lpszEncryptionPassword);

Unicode (Windows)
LPWSTR GetEncryptionPassword();
INT SetEncryptionPassword(LPCWSTR lpszEncryptionPassword);

char* cloudstorage_s3_getencryptionpassword(void* lpObj);
int cloudstorage_s3_setencryptionpassword(void* lpObj, const char* lpszEncryptionPassword);

QString GetEncryptionPassword();
int SetEncryptionPassword(QString qsEncryptionPassword);

Default Value

""

Remarks

If this property is populated when CreateObject or GetObject is called, the class will attempt to encrypt or decrypt the data before uploading or after downloading it.

The class uses the specified value to generate the necessary encryption Key and IV values using the PKCS5 password digest algorithm. This provides a simpler alternative to creating and managing Key and IV values directly.

It is also possible, however, to explicitly specify the Key and IV values to use by setting the EncryptionKey and EncryptionIV configuration settings. This may be necessary if, for example, the data need to be encrypted or decrypted by another utility that generates Key and IV values differently.

This property is not available at design time.

Data Type

String

FirewallAutoDetect Property (S3 Class)

This property tells the class whether or not to automatically detect and use firewall system settings, if available.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetFirewallAutoDetect();
int SetFirewallAutoDetect(int bFirewallAutoDetect);

Unicode (Windows)
BOOL GetFirewallAutoDetect();
INT SetFirewallAutoDetect(BOOL bFirewallAutoDetect);

int cloudstorage_s3_getfirewallautodetect(void* lpObj);
int cloudstorage_s3_setfirewallautodetect(void* lpObj, int bFirewallAutoDetect);

bool GetFirewallAutoDetect();
int SetFirewallAutoDetect(bool bFirewallAutoDetect);

Default Value

FALSE

Remarks

This property tells the class whether or not to automatically detect and use firewall system settings, if available.

Data Type

Boolean

FirewallType Property (S3 Class)

This property determines the type of firewall to connect through.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetFirewallType();
int SetFirewallType(int iFirewallType);

Unicode (Windows)
INT GetFirewallType();
INT SetFirewallType(INT iFirewallType);

FW_NONE(0), 
FW_TUNNEL(1), 
FW_SOCKS4(2), 
FW_SOCKS5(3), 
FW_SOCKS4A(10)

int cloudstorage_s3_getfirewalltype(void* lpObj);
int cloudstorage_s3_setfirewalltype(void* lpObj, int iFirewallType);

int GetFirewallType();
int SetFirewallType(int iFirewallType);

Default Value

0

Remarks

This property determines the type of firewall to connect through. The applicable values are as follows:

Data Type

Integer

FirewallHost Property (S3 Class)

This property contains the name or IP address of firewall (optional).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetFirewallHost();
int SetFirewallHost(const char* lpszFirewallHost);

Unicode (Windows)
LPWSTR GetFirewallHost();
INT SetFirewallHost(LPCWSTR lpszFirewallHost);

char* cloudstorage_s3_getfirewallhost(void* lpObj);
int cloudstorage_s3_setfirewallhost(void* lpObj, const char* lpszFirewallHost);

QString GetFirewallHost();
int SetFirewallHost(QString qsFirewallHost);

Default Value

""

Remarks

This property contains the name or IP address of firewall (optional). If a FirewallHost is given, the requested connections will be authenticated through the specified firewall when connecting.

If this property is set to a Domain Name, a DNS request is initiated. Upon successful termination of the request, this property is set to the corresponding address. If the search is not successful, the class fails with an error.

Data Type

String

FirewallPassword Property (S3 Class)

This property contains a password if authentication is to be used when connecting through the firewall.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetFirewallPassword();
int SetFirewallPassword(const char* lpszFirewallPassword);

Unicode (Windows)
LPWSTR GetFirewallPassword();
INT SetFirewallPassword(LPCWSTR lpszFirewallPassword);

char* cloudstorage_s3_getfirewallpassword(void* lpObj);
int cloudstorage_s3_setfirewallpassword(void* lpObj, const char* lpszFirewallPassword);

QString GetFirewallPassword();
int SetFirewallPassword(QString qsFirewallPassword);

Default Value

""

Remarks

This property contains a password if authentication is to be used when connecting through the firewall. If FirewallHost is specified, the FirewallUser and FirewallPassword properties are used to connect and authenticate to the given firewall. If the authentication fails, the class fails with an error.

Data Type

String

FirewallPort Property (S3 Class)

This property contains the transmission control protocol (TCP) port for the firewall Host .

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetFirewallPort();
int SetFirewallPort(int iFirewallPort);

Unicode (Windows)
INT GetFirewallPort();
INT SetFirewallPort(INT iFirewallPort);

int cloudstorage_s3_getfirewallport(void* lpObj);
int cloudstorage_s3_setfirewallport(void* lpObj, int iFirewallPort);

int GetFirewallPort();
int SetFirewallPort(int iFirewallPort);

Default Value

0

Remarks

This property contains the transmission control protocol (TCP) port for the firewall FirewallHost. See the description of the FirewallHost property for details.

Note: This property is set automatically when FirewallType is set to a valid value. See the description of the FirewallType property for details.

Data Type

Integer

FirewallUser Property (S3 Class)

This property contains a user name if authentication is to be used connecting through a firewall.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetFirewallUser();
int SetFirewallUser(const char* lpszFirewallUser);

Unicode (Windows)
LPWSTR GetFirewallUser();
INT SetFirewallUser(LPCWSTR lpszFirewallUser);

char* cloudstorage_s3_getfirewalluser(void* lpObj);
int cloudstorage_s3_setfirewalluser(void* lpObj, const char* lpszFirewallUser);

QString GetFirewallUser();
int SetFirewallUser(QString qsFirewallUser);

Default Value

""

Remarks

This property contains a user name if authentication is to be used connecting through a firewall. If the FirewallHost is specified, this property and FirewallPassword properties are used to connect and authenticate to the given Firewall. If the authentication fails, the class fails with an error.

Data Type

String

FollowRedirects Property (S3 Class)

This property determines what happens when the server issues a redirect.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetFollowRedirects();
int SetFollowRedirects(int iFollowRedirects);

Unicode (Windows)
INT GetFollowRedirects();
INT SetFollowRedirects(INT iFollowRedirects);

FR_NEVER(0), 
FR_ALWAYS(1), 
FR_SAME_SCHEME(2)

int cloudstorage_s3_getfollowredirects(void* lpObj);
int cloudstorage_s3_setfollowredirects(void* lpObj, int iFollowRedirects);

int GetFollowRedirects();
int SetFollowRedirects(int iFollowRedirects);

Default Value

0

Remarks

This property specifies how the class should behave when the server returns a redirect response (e.g., "Object Moved"). Valid values are as follows:

Data Type

Integer

Idle Property (S3 Class)

The current status of the class.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetIdle();

Unicode (Windows)
BOOL GetIdle();

int cloudstorage_s3_getidle(void* lpObj);

bool GetIdle();

Default Value

TRUE

Remarks

Idle will be False if the component is currently busy (communicating and/or waiting for an answer), and True at all other times.

This property is read-only.

Data Type

Boolean

LocalFile Property (S3 Class)

This property includes the location of the local file.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetLocalFile();
wchar_t* GetLocalFile_W(); // Windows only
int SetLocalFile(const char* lpszLocalFile);
int SetLocalFile(const wchar_t* lpszLocalFile); // Windows only

Unicode (Windows)
LPWSTR GetLocalFile();
INT SetLocalFile(LPCWSTR lpszLocalFile);

char* cloudstorage_s3_getlocalfile(void* lpObj);
wchar_t* cloudstorage_s3_getlocalfile_W(void* lpObj); // Windows only
int cloudstorage_s3_setlocalfile(void* lpObj, const char* lpszLocalFile);
int cloudstorage_s3_setlocalfile(void* lpObj, const wchar_t* lpszLocalFile); // Windows only

QString GetLocalFile();
int SetLocalFile(QString qsLocalFile);

Default Value

""

Remarks

This property specifies the location of a file on a disk. This is used as the source file when calling CreateObject or UploadPart; and as the destination file when calling GetObject.

Note: Setting this property to a nonempty value will discard any streams set using SetDownloadStream and SetUploadStream. Similarly, passing a non-null value to either of the aforementioned methods will clear this property.

Data Type

String

LocalHost Property (S3 Class)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetLocalHost();
int SetLocalHost(const char* lpszLocalHost);

Unicode (Windows)
LPWSTR GetLocalHost();
INT SetLocalHost(LPCWSTR lpszLocalHost);

char* cloudstorage_s3_getlocalhost(void* lpObj);
int cloudstorage_s3_setlocalhost(void* lpObj, const char* lpszLocalHost);

QString GetLocalHost();
int SetLocalHost(QString qsLocalHost);

Default Value

""

Remarks

The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface.

If the class is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

Data Type

String

MetadataCount Property (S3 Class)

The number of records in the Metadata arrays.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetMetadataCount();
int SetMetadataCount(int iMetadataCount);

Unicode (Windows)
INT GetMetadataCount();
INT SetMetadataCount(INT iMetadataCount);

int cloudstorage_s3_getmetadatacount(void* lpObj);
int cloudstorage_s3_setmetadatacount(void* lpObj, int iMetadataCount);

int GetMetadataCount();
int SetMetadataCount(int iMetadataCount);

Default Value

0

Remarks

This property controls the size of the following arrays:

• MetadataName
• MetadataValue

The array indices start at 0 and end at MetadataCount - 1.

This property is not available at design time.

Data Type

Integer

MetadataName Property (S3 Class)

The property contains the name of the metadata item.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetMetadataName(int iMetadataIndex);
int SetMetadataName(int iMetadataIndex, const char* lpszMetadataName);

Unicode (Windows)
LPWSTR GetMetadataName(INT iMetadataIndex);
INT SetMetadataName(INT iMetadataIndex, LPCWSTR lpszMetadataName);

char* cloudstorage_s3_getmetadataname(void* lpObj, int metadataindex);
int cloudstorage_s3_setmetadataname(void* lpObj, int metadataindex, const char* lpszMetadataName);

QString GetMetadataName(int iMetadataIndex);
int SetMetadataName(int iMetadataIndex, QString qsMetadataName);

Default Value

""

Remarks

The property contains the name of the metadata item.

This property specifies the name of the metadata item. The server stores metadata names in lowercase.

Note: The class will automatically prepend the service-appropriate prefix (e.g., x-amz-meta-, x-goog-meta-) to this value when submitting metadata items to the server and will automatically strip that prefix from this value when this property is populated.

The MetadataIndex parameter specifies the index of the item in the array. The size of the array is controlled by the MetadataCount property.

This property is not available at design time.

Data Type

String

MetadataValue Property (S3 Class)

This property contains the value of the metadata item.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetMetadataValue(int iMetadataIndex);
int SetMetadataValue(int iMetadataIndex, const char* lpszMetadataValue);

Unicode (Windows)
LPWSTR GetMetadataValue(INT iMetadataIndex);
INT SetMetadataValue(INT iMetadataIndex, LPCWSTR lpszMetadataValue);

char* cloudstorage_s3_getmetadatavalue(void* lpObj, int metadataindex);
int cloudstorage_s3_setmetadatavalue(void* lpObj, int metadataindex, const char* lpszMetadataValue);

QString GetMetadataValue(int iMetadataIndex);
int SetMetadataValue(int iMetadataIndex, QString qsMetadataValue);

Default Value

""

Remarks

This property contains the value of the metadata item.

This property specifies the value of the metadata item.

The MetadataIndex parameter specifies the index of the item in the array. The size of the array is controlled by the MetadataCount property.

This property is not available at design time.

Data Type

String

ObjectData Property (S3 Class)

This property includes the data that were downloaded or that should be uploaded.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetObjectData(char* &lpObjectData, int &lenObjectData);
int SetObjectData(const char* lpObjectData, int lenObjectData);

Unicode (Windows)
INT GetObjectData(LPSTR &lpObjectData, INT &lenObjectData);
INT SetObjectData(LPCSTR lpObjectData, INT lenObjectData);

int cloudstorage_s3_getobjectdata(void* lpObj, char** lpObjectData, int* lenObjectData);
int cloudstorage_s3_setobjectdata(void* lpObj, const char* lpObjectData, int lenObjectData);

QByteArray GetObjectData();
int SetObjectData(QByteArray qbaObjectData);

Default Value

""

Remarks

This property is populated with object data after calling GetObject if SetDownloadStream and LocalFile are not set.

This property also can be set before calling CreateObject or UploadPart; its data will be uploaded if SetUploadStream and LocalFile are not set.

This property is not available at design time.

Data Type

Binary String

ObjectDelimiter Property (S3 Class)

This property includes the delimiter string to use when listing objects.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectDelimiter();
int SetObjectDelimiter(const char* lpszObjectDelimiter);

Unicode (Windows)
LPWSTR GetObjectDelimiter();
INT SetObjectDelimiter(LPCWSTR lpszObjectDelimiter);

char* cloudstorage_s3_getobjectdelimiter(void* lpObj);
int cloudstorage_s3_setobjectdelimiter(void* lpObj, const char* lpszObjectDelimiter);

QString GetObjectDelimiter();
int SetObjectDelimiter(QString qsObjectDelimiter);

Default Value

""

Remarks

If this property is nonempty when ListObjects or ListVersions is called, any objects (or object versions) whose names contain the same string between the specified ObjectPrefix and the first occurrence of the specified delimiter that follow will be rolled up into a common prefix element, which is returned in place of the individual objects.

The PrefixList event will fire once for each common prefix returned. If the StorePrefixList configuration setting is enabled, the class also will populate the PrefixCount and Prefix[i] configuration settings.

Object Hierarchy Traversal

By using the ObjectDelimiter and ObjectPrefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of objects (or object versions) as if it were a filesystem. For example, assume that objects with the following names exist within a bucket:

• MyCompany/
• MyCompany/Department1/
• MyCompany/Department2/
• MyCompany/Department2/EmployeeA
• MyCompany/Department2/EmployeeB

With ObjectDelimiter set to /, we can set ObjectPrefix to successively "deeper" values before calling ListObjects or ListVersions for the following effect:

This property is not available at design time.

Data Type

String

ObjectMarker Property (S3 Class)

This property includes a marker indicating what page of objects to return next.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectMarker();
int SetObjectMarker(const char* lpszObjectMarker);

Unicode (Windows)
LPWSTR GetObjectMarker();
INT SetObjectMarker(LPCWSTR lpszObjectMarker);

char* cloudstorage_s3_getobjectmarker(void* lpObj);
int cloudstorage_s3_setobjectmarker(void* lpObj, const char* lpszObjectMarker);

QString GetObjectMarker();
int SetObjectMarker(QString qsObjectMarker);

Default Value

""

Remarks

This property will be populated when ListObjects is called if the results are paged and there are more pages. To list all objects, continue to call ListObjects until this property returns an empty string.

Refer to ListObjects for more information.

Note: This property is cleared any time ServiceProvider changes; marker values are valid only when used with the provider that generated them.

This property is not available at design time.

Data Type

String

ObjectPrefix Property (S3 Class)

This property includes a prefix used to restrict the results returned when listing objects.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectPrefix();
int SetObjectPrefix(const char* lpszObjectPrefix);

Unicode (Windows)
LPWSTR GetObjectPrefix();
INT SetObjectPrefix(LPCWSTR lpszObjectPrefix);

char* cloudstorage_s3_getobjectprefix(void* lpObj);
int cloudstorage_s3_setobjectprefix(void* lpObj, const char* lpszObjectPrefix);

QString GetObjectPrefix();
int SetObjectPrefix(QString qsObjectPrefix);

Default Value

""

Remarks

This property, if nonempty, is used to restrict the results returned by ListObjects (or ListVersions) to only those objects (or object versions) whose names begin with the given value.

Object Hierarchy Traversal

By using the ObjectDelimiter and ObjectPrefix properties in tandem, applications can effectively "traverse" a virtual hierarchy of objects (or object versions) as if it were a filesystem. For example, assume that objects with the following names exist within a bucket:

• MyCompany/
• MyCompany/Department1/
• MyCompany/Department2/
• MyCompany/Department2/EmployeeA
• MyCompany/Department2/EmployeeB

With ObjectDelimiter set to /, we can set ObjectPrefix to successively "deeper" values before calling ListObjects or ListVersions for the following effect:

This property is not available at design time.

Data Type

String

ObjectsCount Property (S3 Class)

The number of records in the Objects arrays.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetObjectsCount();

Unicode (Windows)
INT GetObjectsCount();

int cloudstorage_s3_getobjectscount(void* lpObj);

int GetObjectsCount();

Default Value

0

Remarks

This property controls the size of the following arrays:

• ObjectsDeleted
• ObjectsETag
• ObjectsLastModified
• ObjectsLatestVersion
• ObjectsName
• ObjectsOwnerDisplayName
• ObjectsOwnerId
• ObjectsSize
• ObjectsStorageClass
• ObjectsUploadId
• ObjectsVersionId

The array indices start at 0 and end at ObjectsCount - 1.

This property is read-only and not available at design time.

Data Type

Integer

ObjectsDeleted Property (S3 Class)

This property specifies whether this object version is a delete marker.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetObjectsDeleted(int iObjectsIndex);

Unicode (Windows)
BOOL GetObjectsDeleted(INT iObjectsIndex);

int cloudstorage_s3_getobjectsdeleted(void* lpObj, int objectsindex);

bool GetObjectsDeleted(int iObjectsIndex);

Default Value

FALSE

Remarks

This property specifies whether this object version is a delete marker.

This property indicates whether this object version is a delete marker. Delete markers are created when an object in a versioning-enabled bucket is "deleted" (i.e., instead of actually deleting any data); refer to DeleteObject for more information.

This is applicable only when ListVersions is called, or when GetObjectInfo is called while VersionId is nonempty.; false in all other cases.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

Boolean

ObjectsETag Property (S3 Class)

This property contains the ETag of the object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsETag(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsETag(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsetag(void* lpObj, int objectsindex);

QString GetObjectsETag(int iObjectsIndex);

Default Value

""

Remarks

This property contains the ETag of the object.

This property reflects the ETag of the object.

An object's ETag is an MD5 hash of its contents, and as such, it can be used to determine whether its contents have been modified.

This is not applicable when ListMultipartUploads is called.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsLastModified Property (S3 Class)

This property contains the last modified time of the object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsLastModified(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsLastModified(INT iObjectsIndex);

char* cloudstorage_s3_getobjectslastmodified(void* lpObj, int objectsindex);

QString GetObjectsLastModified(int iObjectsIndex);

Default Value

""

Remarks

This property contains the last modified time of the object.

This property reflects the last modified time of the object.

This is not applicable when ListMultipartUploads is called.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsLatestVersion Property (S3 Class)

This property specifies whether this is the latest object version.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetObjectsLatestVersion(int iObjectsIndex);

Unicode (Windows)
BOOL GetObjectsLatestVersion(INT iObjectsIndex);

int cloudstorage_s3_getobjectslatestversion(void* lpObj, int objectsindex);

bool GetObjectsLatestVersion(int iObjectsIndex);

Default Value

TRUE

Remarks

This property specifies whether this is the latest object version.

This property indicates whether this object version is the latest version available.

This is applicable only when ListVersions is called.; true in all other cases.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

Boolean

ObjectsName Property (S3 Class)

This property contains the name (key) of the object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsName(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsName(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsname(void* lpObj, int objectsindex);

QString GetObjectsName(int iObjectsIndex);

Default Value

""

Remarks

This property contains the name (key) of the object.

This property reflects the name (key) of the object.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsOwnerDisplayName Property (S3 Class)

This property contains the display name of the object's owner.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsOwnerDisplayName(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsOwnerDisplayName(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsownerdisplayname(void* lpObj, int objectsindex);

QString GetObjectsOwnerDisplayName(int iObjectsIndex);

Default Value

""

Remarks

This property contains the display name of the object's owner.

This property reflects the display name of the object's owner.

This is not applicable when GetObjectInfo is called.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsOwnerId Property (S3 Class)

This property contains the Id of the object's owner.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsOwnerId(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsOwnerId(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsownerid(void* lpObj, int objectsindex);

QString GetObjectsOwnerId(int iObjectsIndex);

Default Value

""

Remarks

This property contains the Id of the object's owner.

This property reflects the Id of the object's owner.

This is not applicable when GetObjectInfo is called.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsSize Property (S3 Class)

This property contains the size of the object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int64 GetObjectsSize(int iObjectsIndex);

Unicode (Windows)
LONG64 GetObjectsSize(INT iObjectsIndex);

int64 cloudstorage_s3_getobjectssize(void* lpObj, int objectsindex);

qint64 GetObjectsSize(int iObjectsIndex);

Default Value

0

Remarks

This property contains the size of the object.

This property reflects the size of the object in bytes.

This is not applicable when ListMultipartUploads is called.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

Long64

ObjectsStorageClass Property (S3 Class)

This property contains the storage class of the object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsStorageClass(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsStorageClass(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsstorageclass(void* lpObj, int objectsindex);

QString GetObjectsStorageClass(int iObjectsIndex);

Default Value

""

Remarks

This property contains the storage class of the object.

This property reflects the storage class of the object.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsUploadId Property (S3 Class)

This property contains the upload Id of the multipart upload.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsUploadId(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsUploadId(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsuploadid(void* lpObj, int objectsindex);

QString GetObjectsUploadId(int iObjectsIndex);

Default Value

""

Remarks

This property contains the upload Id of the multipart upload.

This property reflects the upload Id of the multipart upload.

It is applicable only when ListMultipartUploads is called.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

ObjectsVersionId Property (S3 Class)

This property contains the Id of the object version.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetObjectsVersionId(int iObjectsIndex);

Unicode (Windows)
LPWSTR GetObjectsVersionId(INT iObjectsIndex);

char* cloudstorage_s3_getobjectsversionid(void* lpObj, int objectsindex);

QString GetObjectsVersionId(int iObjectsIndex);

Default Value

""

Remarks

This property contains the Id of the object version.

This property reflects the Id of the object version.

Note: The string null is a valid version Id.

This is applicable only when ListVersions is called, or when GetObjectInfo is called while VersionId is nonempty.; empty in all other cases.

The ObjectsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ObjectsCount property.

This property is read-only and not available at design time.

Data Type

String

OtherHeaders Property (S3 Class)

This property includes other headers as determined by the user (optional).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetOtherHeaders();
int SetOtherHeaders(const char* lpszOtherHeaders);

Unicode (Windows)
LPWSTR GetOtherHeaders();
INT SetOtherHeaders(LPCWSTR lpszOtherHeaders);

char* cloudstorage_s3_getotherheaders(void* lpObj);
int cloudstorage_s3_setotherheaders(void* lpObj, const char* lpszOtherHeaders);

QString GetOtherHeaders();
int SetOtherHeaders(QString qsOtherHeaders);

Default Value

""

Remarks

This property can be set to a string of headers to be appended to the HTTP request headers created from other properties like ContentType and From.

The headers must follow the format Header: Value as described in the HTTP specifications. Header lines should be separated by CRLF ("\r\n") .

Use this property with caution. If this property contains invalid headers, HTTP requests may fail.

This property is useful for extending the functionality of the class beyond what is provided.

This property is not available at design time.

Data Type

String

Overwrite Property (S3 Class)

This property determines if local files are overwritten.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetOverwrite();
int SetOverwrite(int bOverwrite);

Unicode (Windows)
BOOL GetOverwrite();
INT SetOverwrite(BOOL bOverwrite);

int cloudstorage_s3_getoverwrite(void* lpObj);
int cloudstorage_s3_setoverwrite(void* lpObj, int bOverwrite);

bool GetOverwrite();
int SetOverwrite(bool bOverwrite);

Default Value

FALSE

Remarks

This property controls whether local files are overwritten when calling GetObject. It is applicable only to local files. The default value is false.

Data Type

Boolean

ParsedHeaderCount Property (S3 Class)

The number of records in the ParsedHeader arrays.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetParsedHeaderCount();

Unicode (Windows)
INT GetParsedHeaderCount();

int cloudstorage_s3_getparsedheadercount(void* lpObj);

int GetParsedHeaderCount();

Default Value

0

Remarks

This property controls the size of the following arrays:

• ParsedHeaderField
• ParsedHeaderValue

The array indices start at 0 and end at ParsedHeaderCount - 1.

This property is read-only and not available at design time.

Data Type

Integer

ParsedHeaderField Property (S3 Class)

This property contains the name of the HTTP header (this is the same case as it is delivered).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetParsedHeaderField(int iParsedHeaderIndex);

Unicode (Windows)
LPWSTR GetParsedHeaderField(INT iParsedHeaderIndex);

char* cloudstorage_s3_getparsedheaderfield(void* lpObj, int parsedheaderindex);

QString GetParsedHeaderField(int iParsedHeaderIndex);

Default Value

""

Remarks

This property contains the name of the HTTP Header (this is the same case as it is delivered).

The ParsedHeaderIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ParsedHeaderCount property.

This property is read-only and not available at design time.

Data Type

String

ParsedHeaderValue Property (S3 Class)

This property contains the header contents.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetParsedHeaderValue(int iParsedHeaderIndex);

Unicode (Windows)
LPWSTR GetParsedHeaderValue(INT iParsedHeaderIndex);

char* cloudstorage_s3_getparsedheadervalue(void* lpObj, int parsedheaderindex);

QString GetParsedHeaderValue(int iParsedHeaderIndex);

Default Value

""

Remarks

This property contains the Header contents.

The ParsedHeaderIndex parameter specifies the index of the item in the array. The size of the array is controlled by the ParsedHeaderCount property.

This property is read-only and not available at design time.

Data Type

String

PartMarker Property (S3 Class)

This property includes a marker indicating what page of parts to return next.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetPartMarker();
int SetPartMarker(const char* lpszPartMarker);

Unicode (Windows)
LPWSTR GetPartMarker();
INT SetPartMarker(LPCWSTR lpszPartMarker);

char* cloudstorage_s3_getpartmarker(void* lpObj);
int cloudstorage_s3_setpartmarker(void* lpObj, const char* lpszPartMarker);

QString GetPartMarker();
int SetPartMarker(QString qsPartMarker);

Default Value

""

Remarks

This property will be populated when ListParts is called if the results are paged and there are more pages. To list all parts, continue to call ListParts until this property returns empty string.

Refer to ListParts for more information.

Note: This property is cleared any time ServiceProvider changes; marker values are valid only when used with the provider that generated them. Also, this property is not applicable when ServiceProvider is spGoogleStorage (2). Google Cloud Storage does not support multipart uploads.

This property is not available at design time.

Data Type

String

PartsCount Property (S3 Class)

The number of records in the Parts arrays.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetPartsCount();

Unicode (Windows)
INT GetPartsCount();

int cloudstorage_s3_getpartscount(void* lpObj);

int GetPartsCount();

Default Value

0

Remarks

This property controls the size of the following arrays:

• PartsETag
• PartsLastModified
• PartsNumber
• PartsObjectName
• PartsOwnerDisplayName
• PartsOwnerId
• PartsSize

The array indices start at 0 and end at PartsCount - 1.

This property is read-only and not available at design time.

Data Type

Integer

PartsETag Property (S3 Class)

This property contains the ETag of the part.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetPartsETag(int iPartsIndex);

Unicode (Windows)
LPWSTR GetPartsETag(INT iPartsIndex);

char* cloudstorage_s3_getpartsetag(void* lpObj, int partsindex);

QString GetPartsETag(int iPartsIndex);

Default Value

""

Remarks

This property contains the ETag of the part.

This property reflects the ETag of the part.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

String

PartsLastModified Property (S3 Class)

This property contains the last modified time of the part.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetPartsLastModified(int iPartsIndex);

Unicode (Windows)
LPWSTR GetPartsLastModified(INT iPartsIndex);

char* cloudstorage_s3_getpartslastmodified(void* lpObj, int partsindex);

QString GetPartsLastModified(int iPartsIndex);

Default Value

""

Remarks

This property contains the last modified time of the part.

This property reflects the last modified time of the part.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

String

PartsObjectName Property (S3 Class)

This property contains the name (key) of the object that the part was uploaded for.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetPartsObjectName(int iPartsIndex);

Unicode (Windows)
LPWSTR GetPartsObjectName(INT iPartsIndex);

char* cloudstorage_s3_getpartsobjectname(void* lpObj, int partsindex);

QString GetPartsObjectName(int iPartsIndex);

Default Value

""

Remarks

This property contains the name (key) of the object that the part was uploaded for.

This property reflects the name (key) of the object that the part was uploaded for.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

String

PartsOwnerDisplayName Property (S3 Class)

This property contains the display name of the part's owner.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetPartsOwnerDisplayName(int iPartsIndex);

Unicode (Windows)
LPWSTR GetPartsOwnerDisplayName(INT iPartsIndex);

char* cloudstorage_s3_getpartsownerdisplayname(void* lpObj, int partsindex);

QString GetPartsOwnerDisplayName(int iPartsIndex);

Default Value

""

Remarks

This property contains the display name of the part's owner.

This property reflects the display name of the part's owner.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

String

PartsOwnerId Property (S3 Class)

This property contains the Id of the part's owner.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetPartsOwnerId(int iPartsIndex);

Unicode (Windows)
LPWSTR GetPartsOwnerId(INT iPartsIndex);

char* cloudstorage_s3_getpartsownerid(void* lpObj, int partsindex);

QString GetPartsOwnerId(int iPartsIndex);

Default Value

""

Remarks

This property contains the Id of the part's owner.

This property reflects the Id of the part's owner.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

String

PartsNumber Property (S3 Class)

This property contains the number of the part.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetPartsNumber(int iPartsIndex);

Unicode (Windows)
INT GetPartsNumber(INT iPartsIndex);

int cloudstorage_s3_getpartsnumber(void* lpObj, int partsindex);

int GetPartsNumber(int iPartsIndex);

Default Value

0

Remarks

This property contains the number of the part.

This property reflects the number of the part.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

Integer

PartsSize Property (S3 Class)

This property contains the size of the part.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int64 GetPartsSize(int iPartsIndex);

Unicode (Windows)
LONG64 GetPartsSize(INT iPartsIndex);

int64 cloudstorage_s3_getpartssize(void* lpObj, int partsindex);

qint64 GetPartsSize(int iPartsIndex);

Default Value

0

Remarks

This property contains the size of the part.

This property reflects the size of the part in bytes.

The PartsIndex parameter specifies the index of the item in the array. The size of the array is controlled by the PartsCount property.

This property is read-only and not available at design time.

Data Type

Long64

ProxyAuthScheme Property (S3 Class)

This property is used to tell the class which type of authorization to perform when connecting to the proxy.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetProxyAuthScheme();
int SetProxyAuthScheme(int iProxyAuthScheme);

Unicode (Windows)
INT GetProxyAuthScheme();
INT SetProxyAuthScheme(INT iProxyAuthScheme);

AUTH_BASIC(0), 
AUTH_DIGEST(1), 
AUTH_PROPRIETARY(2), 
AUTH_NONE(3), 
AUTH_NTLM(4), 
AUTH_NEGOTIATE(5)

int cloudstorage_s3_getproxyauthscheme(void* lpObj);
int cloudstorage_s3_setproxyauthscheme(void* lpObj, int iProxyAuthScheme);

int GetProxyAuthScheme();
int SetProxyAuthScheme(int iProxyAuthScheme);

Default Value

0

Remarks

This property is used to tell the class which type of authorization to perform when connecting to the proxy. This is used only when the ProxyUser and ProxyPassword properties are set.

ProxyAuthScheme should be set to authNone (3) when no authentication is expected.

By default, ProxyAuthScheme is authBasic (0), and if the ProxyUser and ProxyPassword properties are set, the component will attempt basic authentication.

If ProxyAuthScheme is set to authDigest (1), digest authentication will be attempted instead.

If ProxyAuthScheme is set to authProprietary (2), then the authorization token will not be generated by the class. Look at the configuration file for the class being used to find more information about manually setting this token.

If ProxyAuthScheme is set to authNtlm (4), NTLM authentication will be used.

For security reasons, setting this property will clear the values of ProxyUser and ProxyPassword.

Data Type

Integer

ProxyAutoDetect Property (S3 Class)

This property tells the class whether or not to automatically detect and use proxy system settings, if available.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetProxyAutoDetect();
int SetProxyAutoDetect(int bProxyAutoDetect);

Unicode (Windows)
BOOL GetProxyAutoDetect();
INT SetProxyAutoDetect(BOOL bProxyAutoDetect);

int cloudstorage_s3_getproxyautodetect(void* lpObj);
int cloudstorage_s3_setproxyautodetect(void* lpObj, int bProxyAutoDetect);

bool GetProxyAutoDetect();
int SetProxyAutoDetect(bool bProxyAutoDetect);

Default Value

FALSE

Remarks

This property tells the class whether or not to automatically detect and use proxy system settings, if available. The default value is false.

Data Type

Boolean

ProxyPassword Property (S3 Class)

This property contains a password if authentication is to be used for the proxy.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetProxyPassword();
int SetProxyPassword(const char* lpszProxyPassword);

Unicode (Windows)
LPWSTR GetProxyPassword();
INT SetProxyPassword(LPCWSTR lpszProxyPassword);

char* cloudstorage_s3_getproxypassword(void* lpObj);
int cloudstorage_s3_setproxypassword(void* lpObj, const char* lpszProxyPassword);

QString GetProxyPassword();
int SetProxyPassword(QString qsProxyPassword);

Default Value

""

Remarks

This property contains a password if authentication is to be used for the proxy.

If ProxyAuthScheme is set to Basic Authentication, the ProxyUser and ProxyPassword are Base64 encoded and the proxy authentication token will be generated in the form Basic [encoded-user-password].

If ProxyAuthScheme is set to Digest Authentication, the ProxyUser and ProxyPassword properties are used to respond to the Digest Authentication challenge from the server.

If ProxyAuthScheme is set to NTLM Authentication, the ProxyUser and ProxyPassword properties are used to authenticate through NTLM negotiation.

Data Type

String

ProxyPort Property (S3 Class)

This property contains the Transmission Control Protocol (TCP) port for the proxy Server (default 80).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetProxyPort();
int SetProxyPort(int iProxyPort);

Unicode (Windows)
INT GetProxyPort();
INT SetProxyPort(INT iProxyPort);

int cloudstorage_s3_getproxyport(void* lpObj);
int cloudstorage_s3_setproxyport(void* lpObj, int iProxyPort);

int GetProxyPort();
int SetProxyPort(int iProxyPort);

Default Value

80

Remarks

This property contains the Transmission Control Protocol (TCP) port for the proxy ProxyServer (default 80). See the description of the ProxyServer property for details.

Data Type

Integer

ProxyServer Property (S3 Class)

If a proxy Server is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetProxyServer();
int SetProxyServer(const char* lpszProxyServer);

Unicode (Windows)
LPWSTR GetProxyServer();
INT SetProxyServer(LPCWSTR lpszProxyServer);

char* cloudstorage_s3_getproxyserver(void* lpObj);
int cloudstorage_s3_setproxyserver(void* lpObj, const char* lpszProxyServer);

QString GetProxyServer();
int SetProxyServer(QString qsProxyServer);

Default Value

""

Remarks

If a proxy ProxyServer is given, then the HTTP request is sent to the proxy instead of the server otherwise specified.

If the ProxyServer property is set to a domain name, a DNS request is initiated. Upon successful termination of the request, the ProxyServer property is set to the corresponding address. If the search is not successful, an error is returned.

Data Type

String

ProxySSL Property (S3 Class)

This property determines when to use a Secure Sockets Layer (SSL) for the connection to the proxy.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetProxySSL();
int SetProxySSL(int iProxySSL);

Unicode (Windows)
INT GetProxySSL();
INT SetProxySSL(INT iProxySSL);

PS_AUTOMATIC(0), 
PS_ALWAYS(1), 
PS_NEVER(2), 
PS_TUNNEL(3)

int cloudstorage_s3_getproxyssl(void* lpObj);
int cloudstorage_s3_setproxyssl(void* lpObj, int iProxySSL);

int GetProxySSL();
int SetProxySSL(int iProxySSL);

Default Value

0

Remarks

This property determines when to use a Secure Sockets Layer (SSL) for the connection to the proxy. The applicable values are as follows:

Data Type

Integer

ProxyUser Property (S3 Class)

This property contains a user name, if authentication is to be used for the proxy.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetProxyUser();
int SetProxyUser(const char* lpszProxyUser);

Unicode (Windows)
LPWSTR GetProxyUser();
INT SetProxyUser(LPCWSTR lpszProxyUser);

char* cloudstorage_s3_getproxyuser(void* lpObj);
int cloudstorage_s3_setproxyuser(void* lpObj, const char* lpszProxyUser);

QString GetProxyUser();
int SetProxyUser(QString qsProxyUser);

Default Value

""

Remarks

This property contains a user name, if authentication is to be used for the proxy.

If ProxyAuthScheme is set to Basic Authentication, the ProxyUser and ProxyPassword are Base64 encoded and the proxy authentication token will be generated in the form Basic [encoded-user-password].

If ProxyAuthScheme is set to Digest Authentication, the ProxyUser and ProxyPassword properties are used to respond to the Digest Authentication challenge from the server.

If ProxyAuthScheme is set to NTLM Authentication, the ProxyUser and ProxyPassword properties are used to authenticate through NTLM negotiation.

Data Type

String

QueryParamCount Property (S3 Class)

The number of records in the QueryParam arrays.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetQueryParamCount();
int SetQueryParamCount(int iQueryParamCount);

Unicode (Windows)
INT GetQueryParamCount();
INT SetQueryParamCount(INT iQueryParamCount);

int cloudstorage_s3_getqueryparamcount(void* lpObj);
int cloudstorage_s3_setqueryparamcount(void* lpObj, int iQueryParamCount);

int GetQueryParamCount();
int SetQueryParamCount(int iQueryParamCount);

Default Value

0

Remarks

This property controls the size of the following arrays:

• QueryParamName
• QueryParamValue

The array indices start at 0 and end at QueryParamCount - 1.

This property is not available at design time.

Data Type

Integer

QueryParamName Property (S3 Class)

This property specifies the name of the query parameter.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetQueryParamName(int iQueryParamIndex);
int SetQueryParamName(int iQueryParamIndex, const char* lpszQueryParamName);

Unicode (Windows)
LPWSTR GetQueryParamName(INT iQueryParamIndex);
INT SetQueryParamName(INT iQueryParamIndex, LPCWSTR lpszQueryParamName);

char* cloudstorage_s3_getqueryparamname(void* lpObj, int queryparamindex);
int cloudstorage_s3_setqueryparamname(void* lpObj, int queryparamindex, const char* lpszQueryParamName);

QString GetQueryParamName(int iQueryParamIndex);
int SetQueryParamName(int iQueryParamIndex, QString qsQueryParamName);

Default Value

""

Remarks

This property specifies the name of the query parameter.

This property specifies the name of the query parameter.

The QueryParamIndex parameter specifies the index of the item in the array. The size of the array is controlled by the QueryParamCount property.

This property is not available at design time.

Data Type

String

QueryParamValue Property (S3 Class)

This property contains the value of the query parameter.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetQueryParamValue(int iQueryParamIndex);
int SetQueryParamValue(int iQueryParamIndex, const char* lpszQueryParamValue);

Unicode (Windows)
LPWSTR GetQueryParamValue(INT iQueryParamIndex);
INT SetQueryParamValue(INT iQueryParamIndex, LPCWSTR lpszQueryParamValue);

char* cloudstorage_s3_getqueryparamvalue(void* lpObj, int queryparamindex);
int cloudstorage_s3_setqueryparamvalue(void* lpObj, int queryparamindex, const char* lpszQueryParamValue);

QString GetQueryParamValue(int iQueryParamIndex);
int SetQueryParamValue(int iQueryParamIndex, QString qsQueryParamValue);

Default Value

""

Remarks

This property contains the value of the query parameter.

This property specifies the value of the query parameter. The class will automatically URL encode this value when sending the request.

The QueryParamIndex parameter specifies the index of the item in the array. The size of the array is controlled by the QueryParamCount property.

This property is not available at design time.

Data Type

String

Range Property (S3 Class)

This property includes the range of bytes to request.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetRange();
int SetRange(const char* lpszRange);

Unicode (Windows)
LPWSTR GetRange();
INT SetRange(LPCWSTR lpszRange);

char* cloudstorage_s3_getrange(void* lpObj);
int cloudstorage_s3_setrange(void* lpObj, const char* lpszRange);

QString GetRange();
int SetRange(QString qsRange);

Default Value

""

Remarks

This property specifies the range of bytes to request from the server. If this property is nonempty when a GetObject request is being constructed, a header like Range: bytes=Range will be added to the request, with Range substituted with the specified value.

Following are the two valid formats for this property's value:

• StartByte-
• StartByte-EndByte

Note: If the StartByte property is greater than zero when GetObject is called (i.e., when a download is being resumed), and this property is nonempty, the class will automatically advance the StartByte value in the specified range by StartByte bytes when sending the Range header to the server. This ensures that the previously downloaded data at the start of the specified range are not downloaded again when the download is resumed.

This property is not available at design time.

Data Type

String

Region Property (S3 Class)

This property includes the region the class will make requests against.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetRegion();
int SetRegion(const char* lpszRegion);

Unicode (Windows)
LPWSTR GetRegion();
INT SetRegion(LPCWSTR lpszRegion);

char* cloudstorage_s3_getregion(void* lpObj);
int cloudstorage_s3_setregion(void* lpObj, const char* lpszRegion);

QString GetRegion();
int SetRegion(QString qsRegion);

Default Value

"us-east-1"

Remarks

This property controls which region the class will make requests against; it should be changed to create or access resources in other regions.

Each service provider has a different default region, and the class will automatically set this property to the selected service provider's default region anytime ServiceProvider changes. The custom service provider's "default region" is an empty string (i.e., setting ServiceProvider to spCustom (255) will clear this property).

Note: When the custom service provider is selected, the class uses the base URL specified by the ServiceProviderURL configuration setting to generate request URLs. If the base URL contains a %region% token, the class will replace it with this property's value any time it generates a request URL. Refer to the ServiceProviderURL setting's documentation for more information.

Amazon S3 Regions

Alibaba Cloud Object Storage Regions

Backblaze B2 Regions

All Backblaze B2 region strings take the form us-west-###, where ### is a three-digit number. By default, the class uses us-west-000.

To determine the exact region string, log into the Backblaze B2 web console and refer to the "S3 Endpoint" value, which corresponds to the application keypair that will be used for authentication; this endpoint value will include the region string.

Note: The master application key for a Backblaze B2 account cannot be used with Backblaze's S3-compatible API; create a nonmaster application key if necessary.

Cloudflare R2 Regions

By default, the class uses auto. This is the only valid value for this service provider.

Digital Ocean Spaces Regions

Google Cloud Storage Regions

Huawei Cloud Object Storage Regions

IBM Cloud Object Storage Regions

Note: Optionally, private. or direct. may be prepended to any of the values above; refer to IBM Cloud's Object Storage documentation for information on regions and endpoints.

Linode Object Storage Regions

Important: Each "region" supported by Linode's Object Storage service is actually a completely standalone storage cluster. These clusters do not interact with each other in any way, which causes the following nonstandard behaviors:

• Bucket names may be reused in each region (however, they must still be "globally" unique within each region).
• The ListBuckets method will return only those buckets located in the currently selected region; there is no way to retrieve a list of all regions' buckets.
• Similarly, the BucketExists and GetBucketLocation methods consider only those buckets located in the currently selected region.
• The CopyObject method cannot be used to copy objects to a bucket in another region.

Oracle Cloud Object Storage Regions

Wasabi Regions

The class will always convert this property's value to lowercase. If this property is cleared, the class will reset it to the default value for the currently selected ServiceProvider.

Data Type

String

SecretKey Property (S3 Class)

This property includes the secret key to use for authentication.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetSecretKey();
int SetSecretKey(const char* lpszSecretKey);

Unicode (Windows)
LPWSTR GetSecretKey();
INT SetSecretKey(LPCWSTR lpszSecretKey);

char* cloudstorage_s3_getsecretkey(void* lpObj);
int cloudstorage_s3_setsecretkey(void* lpObj, const char* lpszSecretKey);

QString GetSecretKey();
int SetSecretKey(QString qsSecretKey);

Default Value

""

Remarks

This property specifies the secret key that should be used for authentication. Both this property and AccessKey must be set before attempting any operations that connect to the server.

Data Type

String

ServiceProvider Property (S3 Class)

This property includes the S3 service provider to use.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetServiceProvider();
int SetServiceProvider(int iServiceProvider);

Unicode (Windows)
INT GetServiceProvider();
INT SetServiceProvider(INT iServiceProvider);

SP_AMAZON_S3(0), 
SP_DIGITAL_OCEAN(1), 
SP_GOOGLE_STORAGE(2), 
SP_WASABI(3), 
SP_BACKBLAZE_B2(4), 
SP_HUAWEI(5), 
SP_ALIBABA(6), 
SP_IBM(7), 
SP_ORACLE(8), 
SP_LINODE(9), 
SP_CLOUDFLARE_R2(10), 
SP_SEAGATE_LYVE_CLOUD(11), 
SP_OORT_DSS(12), 
SP_CUSTOM(255)

int cloudstorage_s3_getserviceprovider(void* lpObj);
int cloudstorage_s3_setserviceprovider(void* lpObj, int iServiceProvider);

int GetServiceProvider();
int SetServiceProvider(int iServiceProvider);

Default Value

0

Remarks

This property specifies the S3 service provider that the class should use. Possible values are as follows:

Note: The following providers require additional configuration before requests can be made:

• spOracle (8): An Object Storage Namespace must be specified using the OracleNamespace configuration setting.
• spCloudflareR2 (10): An Account ID must be specified using the CloudflareAccountID configuration setting.
• spCustom (255): A base URL must be specified using the ServiceProviderURL configuration setting.

Changing this property will automatically result in the following actions:

• Set the Region property to the default region for the provider (empty string for spCustom (255)).
• Reset the UseSSL property to true.
• Reset the StartByte property to 0.
• Clear the ObjectMarker, PartMarker, and VersionMarker properties, as well as the StorageClass and ResumableUploadState configuration settings.

This property is not available at design time.

Data Type

Integer

SSLAcceptServerCertEncoded Property (S3 Class)

This is the certificate (PEM/base64 encoded).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSSLAcceptServerCertEncoded(char* &lpSSLAcceptServerCertEncoded, int &lenSSLAcceptServerCertEncoded);
int SetSSLAcceptServerCertEncoded(const char* lpSSLAcceptServerCertEncoded, int lenSSLAcceptServerCertEncoded);

Unicode (Windows)
INT GetSSLAcceptServerCertEncoded(LPSTR &lpSSLAcceptServerCertEncoded, INT &lenSSLAcceptServerCertEncoded);
INT SetSSLAcceptServerCertEncoded(LPCSTR lpSSLAcceptServerCertEncoded, INT lenSSLAcceptServerCertEncoded);

int cloudstorage_s3_getsslacceptservercertencoded(void* lpObj, char** lpSSLAcceptServerCertEncoded, int* lenSSLAcceptServerCertEncoded);
int cloudstorage_s3_setsslacceptservercertencoded(void* lpObj, const char* lpSSLAcceptServerCertEncoded, int lenSSLAcceptServerCertEncoded);

QByteArray GetSSLAcceptServerCertEncoded();
int SetSSLAcceptServerCertEncoded(QByteArray qbaSSLAcceptServerCertEncoded);

Default Value

""

Remarks

This is the certificate (PEM/base64 encoded). This property is used to assign a specific certificate. The SSLAcceptServerCertStore and SSLAcceptServerCertSubject properties also may be used to specify a certificate.

When SSLAcceptServerCertEncoded is set, a search is initiated in the current SSLAcceptServerCertStore for the private key of the certificate. If the key is found, SSLAcceptServerCertSubject is updated to reflect the full subject of the selected certificate; otherwise, SSLAcceptServerCertSubject is set to an empty string.

This property is not available at design time.

Data Type

Binary String

SSLCertEncoded Property (S3 Class)

This is the certificate (PEM/base64 encoded).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSSLCertEncoded(char* &lpSSLCertEncoded, int &lenSSLCertEncoded);
int SetSSLCertEncoded(const char* lpSSLCertEncoded, int lenSSLCertEncoded);

Unicode (Windows)
INT GetSSLCertEncoded(LPSTR &lpSSLCertEncoded, INT &lenSSLCertEncoded);
INT SetSSLCertEncoded(LPCSTR lpSSLCertEncoded, INT lenSSLCertEncoded);

int cloudstorage_s3_getsslcertencoded(void* lpObj, char** lpSSLCertEncoded, int* lenSSLCertEncoded);
int cloudstorage_s3_setsslcertencoded(void* lpObj, const char* lpSSLCertEncoded, int lenSSLCertEncoded);

QByteArray GetSSLCertEncoded();
int SetSSLCertEncoded(QByteArray qbaSSLCertEncoded);

Default Value

""

Remarks

This is the certificate (PEM/base64 encoded). This property is used to assign a specific certificate. The SSLCertStore and SSLCertSubject properties also may be used to specify a certificate.

When SSLCertEncoded is set, a search is initiated in the current SSLCertStore for the private key of the certificate. If the key is found, SSLCertSubject is updated to reflect the full subject of the selected certificate; otherwise, SSLCertSubject is set to an empty string.

This property is not available at design time.

Data Type

Binary String

SSLCertStore Property (S3 Class)

This is the name of the certificate store for the client certificate.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSSLCertStore(char* &lpSSLCertStore, int &lenSSLCertStore);
int SetSSLCertStore(const char* lpSSLCertStore, int lenSSLCertStore);

Unicode (Windows)
INT GetSSLCertStore(LPSTR &lpSSLCertStore, INT &lenSSLCertStore);
INT SetSSLCertStore(LPCSTR lpSSLCertStore, INT lenSSLCertStore);

int cloudstorage_s3_getsslcertstore(void* lpObj, char** lpSSLCertStore, int* lenSSLCertStore);
int cloudstorage_s3_setsslcertstore(void* lpObj, const char* lpSSLCertStore, int lenSSLCertStore);

QByteArray GetSSLCertStore();
int SetSSLCertStore(QByteArray qbaSSLCertStore);

Default Value

"MY"

Remarks

This is the name of the certificate store for the client certificate.

The SSLCertStoreType property denotes the type of the certificate store specified by SSLCertStore. If the store is password protected, specify the password in SSLCertStorePassword.

SSLCertStore is used in conjunction with the SSLCertSubject property to specify client certificates. If SSLCertStore has a value, and SSLCertSubject or SSLCertEncoded is set, a search for a certificate is initiated. Please see the SSLCertSubject property for details.

Designations of certificate stores are platform-dependent.

The following are designations of the most common User and Machine certificate stores in Windows:

When the certificate store type is PFXFile, this property must be set to the name of the file. When the type is PFXBlob, the property must be set to the binary contents of a PFX file (i.e. PKCS12 certificate store).

Data Type

Binary String

SSLCertStorePassword Property (S3 Class)

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetSSLCertStorePassword();
int SetSSLCertStorePassword(const char* lpszSSLCertStorePassword);

Unicode (Windows)
LPWSTR GetSSLCertStorePassword();
INT SetSSLCertStorePassword(LPCWSTR lpszSSLCertStorePassword);

char* cloudstorage_s3_getsslcertstorepassword(void* lpObj);
int cloudstorage_s3_setsslcertstorepassword(void* lpObj, const char* lpszSSLCertStorePassword);

QString GetSSLCertStorePassword();
int SetSSLCertStorePassword(QString qsSSLCertStorePassword);

Default Value

""

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Data Type

String

SSLCertStoreType Property (S3 Class)

This is the type of certificate store for this certificate.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSSLCertStoreType();
int SetSSLCertStoreType(int iSSLCertStoreType);

Unicode (Windows)
INT GetSSLCertStoreType();
INT SetSSLCertStoreType(INT iSSLCertStoreType);

CST_USER(0), 
CST_MACHINE(1), 
CST_PFXFILE(2), 
CST_PFXBLOB(3), 
CST_JKSFILE(4), 
CST_JKSBLOB(5), 
CST_PEMKEY_FILE(6), 
CST_PEMKEY_BLOB(7), 
CST_PUBLIC_KEY_FILE(8), 
CST_PUBLIC_KEY_BLOB(9), 
CST_SSHPUBLIC_KEY_BLOB(10), 
CST_P7BFILE(11), 
CST_P7BBLOB(12), 
CST_SSHPUBLIC_KEY_FILE(13), 
CST_PPKFILE(14), 
CST_PPKBLOB(15), 
CST_XMLFILE(16), 
CST_XMLBLOB(17), 
CST_JWKFILE(18), 
CST_JWKBLOB(19), 
CST_SECURITY_KEY(20), 
CST_BCFKSFILE(21), 
CST_BCFKSBLOB(22), 
CST_PKCS11(23), 
CST_AUTO(99)

int cloudstorage_s3_getsslcertstoretype(void* lpObj);
int cloudstorage_s3_setsslcertstoretype(void* lpObj, int iSSLCertStoreType);

int GetSSLCertStoreType();
int SetSSLCertStoreType(int iSSLCertStoreType);

Default Value

0

Remarks

This is the type of certificate store for this certificate.

The class supports both public and private keys in a variety of formats. When the cstAuto value is used the class will automatically determine the type. This property can take one of the following values:

Data Type

Integer

SSLCertSubject Property (S3 Class)

This is the subject of the certificate used for client authentication.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetSSLCertSubject();
int SetSSLCertSubject(const char* lpszSSLCertSubject);

Unicode (Windows)
LPWSTR GetSSLCertSubject();
INT SetSSLCertSubject(LPCWSTR lpszSSLCertSubject);

char* cloudstorage_s3_getsslcertsubject(void* lpObj);
int cloudstorage_s3_setsslcertsubject(void* lpObj, const char* lpszSSLCertSubject);

QString GetSSLCertSubject();
int SetSSLCertSubject(QString qsSSLCertSubject);

Default Value

""

Remarks

This is the subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma separated list of distinguished name fields and values. For instance "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are displayed below.

If a field value contains a comma it must be quoted.

Data Type

String

SSLProvider Property (S3 Class)

This specifies the SSL/TLS implementation to use.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSSLProvider();
int SetSSLProvider(int iSSLProvider);

Unicode (Windows)
INT GetSSLProvider();
INT SetSSLProvider(INT iSSLProvider);

SSLP_AUTOMATIC(0), 
SSLP_PLATFORM(1), 
SSLP_INTERNAL(2)

int cloudstorage_s3_getsslprovider(void* lpObj);
int cloudstorage_s3_setsslprovider(void* lpObj, int iSSLProvider);

int GetSSLProvider();
int SetSSLProvider(int iSSLProvider);

Default Value

0

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic) the class will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are:

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected, on Windows the class will use the platform implementation. On Linux/macOS the class will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols the internal implementation is used on all platforms.

Data Type

Integer

SSLServerCertEncoded Property (S3 Class)

This is the certificate (PEM/base64 encoded).

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetSSLServerCertEncoded(char* &lpSSLServerCertEncoded, int &lenSSLServerCertEncoded);

Unicode (Windows)
INT GetSSLServerCertEncoded(LPSTR &lpSSLServerCertEncoded, INT &lenSSLServerCertEncoded);

int cloudstorage_s3_getsslservercertencoded(void* lpObj, char** lpSSLServerCertEncoded, int* lenSSLServerCertEncoded);

QByteArray GetSSLServerCertEncoded();

Default Value

""

Remarks

This is the certificate (PEM/base64 encoded). This property is used to assign a specific certificate. The SSLServerCertStore and SSLServerCertSubject properties also may be used to specify a certificate.

When SSLServerCertEncoded is set, a search is initiated in the current SSLServerCertStore for the private key of the certificate. If the key is found, SSLServerCertSubject is updated to reflect the full subject of the selected certificate; otherwise, SSLServerCertSubject is set to an empty string.

This property is read-only and not available at design time.

Data Type

Binary String

StartByte Property (S3 Class)

This property includes the byte offset from which to resume the upload or download.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int64 GetStartByte();
int SetStartByte(int64 lStartByte);

Unicode (Windows)
LONG64 GetStartByte();
INT SetStartByte(LONG64 lStartByte);

int64 cloudstorage_s3_getstartbyte(void* lpObj);
int cloudstorage_s3_setstartbyte(void* lpObj, int64 lStartByte);

qint64 GetStartByte();
int SetStartByte(qint64 lStartByte);

Default Value

0

Remarks

This property specifies the byte offset from which to resume an automatic multipart upload initiated by CreateObject, or a download initiated by GetObject. Refer to those methods' documentation for more information about resuming uploads and downloads.

When uploading from a stream, the class will always seek forward in the stream if the value of StartByte is greater than 0 when CreateObject is called. Keep this in mind when resuming interrupted object uploads.

Note: This property is automatically reset to 0 anytime ServiceProvider changes.

This property is not available at design time.

Data Type

Long64

Timeout Property (S3 Class)

A timeout for the class.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetTimeout();
int SetTimeout(int iTimeout);

Unicode (Windows)
INT GetTimeout();
INT SetTimeout(INT iTimeout);

int cloudstorage_s3_gettimeout(void* lpObj);
int cloudstorage_s3_settimeout(void* lpObj, int iTimeout);

int GetTimeout();
int SetTimeout(int iTimeout);

Default Value

60

Remarks

If the Timeout property is set to 0, all operations will run uninterrupted until successful completion or an error condition is encountered.

If Timeout is set to a positive value, the class will wait for the operation to complete before returning control.

The class will use DoEvents to enter an efficient wait loop during any potential waiting period, making sure that all system events are processed immediately as they arrive. This ensures that the host application does not "freeze" and remains responsive.

If Timeout expires, and the operation is not yet complete, the class fails with an error.

Please note that by default, all timeouts are inactivity timeouts, i.e. the timeout period is extended by Timeout seconds when any amount of data is successfully sent or received.

The default value for the Timeout property is 60 seconds.

Data Type

Integer

UseSSL Property (S3 Class)

This method includes whether to use SSL/TLS when connecting.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetUseSSL();
int SetUseSSL(int bUseSSL);

Unicode (Windows)
BOOL GetUseSSL();
INT SetUseSSL(BOOL bUseSSL);

int cloudstorage_s3_getusessl(void* lpObj);
int cloudstorage_s3_setusessl(void* lpObj, int bUseSSL);

bool GetUseSSL();
int SetUseSSL(bool bUseSSL);

Default Value

TRUE

Remarks

This property specifies whether the class should use Secure Sockets Layer/Transport Layer Security (SSL/TLS) when connecting.

Note: This property is automatically reset to true any time ServiceProvider changes. The class will ignore any attempts to change this property if one of the following providers is selected, because they require SSL/TLS to be used:

• spDigitalOcean (1)
• spBackblazeB2 (4)
• spOracle (8)
• spSeagateLyveCloud (11)

This property is not available at design time.

Data Type

Boolean

UseVirtualHosting Property (S3 Class)

This property determines which URL style to use when making requests.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetUseVirtualHosting();
int SetUseVirtualHosting(int bUseVirtualHosting);

Unicode (Windows)
BOOL GetUseVirtualHosting();
INT SetUseVirtualHosting(BOOL bUseVirtualHosting);

int cloudstorage_s3_getusevirtualhosting(void* lpObj);
int cloudstorage_s3_setusevirtualhosting(void* lpObj, int bUseVirtualHosting);

bool GetUseVirtualHosting();
int SetUseVirtualHosting(bool bUseVirtualHosting);

Default Value

TRUE

Remarks

If true (default), virtual-hosted-style URLs will be used to make requests: http://yourbucket.s3.amazonaws.com/yourobject.

Note: Hosted-style URLs impose more bucket name restrictions because of DNS server naming restrictions. Refer to Amazon's documentation for more information.

If false, path-style URLs will be used to make requests: http://s3.amazonaws.com/yourbucket/yourobject.

Note: When using the spAmazonS3 (0) service provider, keep in mind that Amazon has publicly announced that buckets created after September 30, 2020, will only support virtual-hosted-style URLs. Buckets created on or before September 30, 2020, will continue to support both URL styles.

Note: This property is ignored when ServiceProvider is set to one of the following:

• spAlibaba (6) Alibaba does not support path-style URLs, only virtual-hosted-style URLs.
• spOracle (8) Oracle Cloud Object Storage does not support virtual-hosted-style URLs, only path-style URLs.
• spOortDSS (12) Oort DSS does not support virtual-hosted-style URLs, only path-style URLs.

This property is not available at design time.

Data Type

Boolean

VersionId Property (S3 Class)

This property includes the object version to make requests against.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetVersionId();
int SetVersionId(const char* lpszVersionId);

Unicode (Windows)
LPWSTR GetVersionId();
INT SetVersionId(LPCWSTR lpszVersionId);

char* cloudstorage_s3_getversionid(void* lpObj);
int cloudstorage_s3_setversionid(void* lpObj, const char* lpszVersionId);

QString GetVersionId();
int SetVersionId(QString qsVersionId);

Default Value

""

Remarks

This property can be set to the Id of a specific object version before calling the following methods to make requests against the specified object version instead of the base object; refer to each one's documentation for more information:

• CopyObject (to copy from a specific object version)
• DeleteObject
• GetLink (to build a link for a specific object version)
• GetObject
• GetObjectInfo
• SendCustomRequest
• UpdateObjectACL

Refer to Amazon's Versioning documentation for more information about versioning.

This property is not available at design time.

Data Type

String

VersioningEnabled Property (S3 Class)

This property includes controls whether versioning is enabled for the currently selected bucket.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int GetVersioningEnabled();
int SetVersioningEnabled(int bVersioningEnabled);

Unicode (Windows)
BOOL GetVersioningEnabled();
INT SetVersioningEnabled(BOOL bVersioningEnabled);

int cloudstorage_s3_getversioningenabled(void* lpObj);
int cloudstorage_s3_setversioningenabled(void* lpObj, int bVersioningEnabled);

bool GetVersioningEnabled();
int SetVersioningEnabled(bool bVersioningEnabled);

Default Value

FALSE

Remarks

This property can be used to query and control whether the bucket currently selected by Bucket has versioning enabled.

Note: If Bucket is empty, or refers to a bucket that does not exist, this property will always return false when queried, and any attempts to set it will fail. This behavior also occurs if the currently selected service provider does not support versioning at all.

Refer to Amazon's Versioning documentation for more information about versioning.

Note: When ServiceProvider is spBackblazeB2 (4), this property will always return true (assuming Bucket is nonempty), and any attempt to change it will fail; Backblaze B2 buckets are always versioned.

This property is not available at design time.

Data Type

Boolean

VersionMarker Property (S3 Class)

This property includes a marker indicating what page of object versions to return next.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* GetVersionMarker();
int SetVersionMarker(const char* lpszVersionMarker);

Unicode (Windows)
LPWSTR GetVersionMarker();
INT SetVersionMarker(LPCWSTR lpszVersionMarker);

char* cloudstorage_s3_getversionmarker(void* lpObj);
int cloudstorage_s3_setversionmarker(void* lpObj, const char* lpszVersionMarker);

QString GetVersionMarker();
int SetVersionMarker(QString qsVersionMarker);

Default Value

""

Remarks

This property will be populated when ListVersions is called if the results are paged and there are more pages. To list all object versions, continue to call ListVersions until this property returns empty string.

Refer to ListVersions for more information.

Note: This property is cleared any time ServiceProvider changes; marker values are valid only when used with the provider that generated them.

This property is not available at design time.

Data Type

String

AbortMultipartUpload Method (S3 Class)

This method aborts a multipart upload.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int AbortMultipartUpload(const char* lpszObjectName, const char* lpszUploadId);

Unicode (Windows)
INT AbortMultipartUpload(LPCWSTR lpszObjectName, LPCWSTR lpszUploadId);

int cloudstorage_s3_abortmultipartupload(void* lpObj, const char* lpszObjectName, const char* lpszUploadId);

int AbortMultipartUpload(const QString& qsObjectName, const QString& qsUploadId);

Remarks

This method aborts the multipart upload of the object named ObjectName specified by UploadId.

When this method is called, all parts that have been uploaded for the multipart upload are deleted from the server.

Note: If any part of the upload is currently in progress, it may be necessary to call this method again after the upload is complete.

If this method is called successfully, the specified UploadId will no longer be valid.

Note: This method is not supported when ServiceProvider is spGoogleStorage (2). Google Cloud Storage does not support multipart uploads.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

AddMetadata Method (S3 Class)

Adds a metadata item to the Metadata properties.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int AddMetadata(const char* lpszName, const char* lpszValue);

Unicode (Windows)
INT AddMetadata(LPCWSTR lpszName, LPCWSTR lpszValue);

int cloudstorage_s3_addmetadata(void* lpObj, const char* lpszName, const char* lpszValue);

int AddMetadata(const QString& qsName, const QString& qsValue);

Remarks

This method adds a metadata item to the Metadata* properties. Name specifies the name of the item, and Value specifies the value of the item. The server stores metadata names in lowercase.

If Name begins with a service-specific metadata (e.g., x-amz-meta-, x-goog-meta-), it will be stripped off. The class will take care of prepending it when sending metadata to the server.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

AddQueryParam Method (S3 Class)

This method adds a query parameter to the QueryParams properties.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int AddQueryParam(const char* lpszName, const char* lpszValue);

Unicode (Windows)
INT AddQueryParam(LPCWSTR lpszName, LPCWSTR lpszValue);

int cloudstorage_s3_addqueryparam(void* lpObj, const char* lpszName, const char* lpszValue);

int AddQueryParam(const QString& qsName, const QString& qsValue);

Remarks

This method is used to add a query parameter to the QueryaParam* properties. Name specifies the name of the parameter, and Value specifies the value of the parameter.

All specified Values will be URL encoded by the class automatically. Consult the service documentation for details on the available parameters.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

AppendObject Method (S3 Class)

This method appends data to the end of the existing object specified by ObjectName .

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int AppendObject(const char* lpszObjectName);

Unicode (Windows)
INT AppendObject(LPCWSTR lpszObjectName);

int cloudstorage_s3_appendobject(void* lpObj, const char* lpszObjectName);

int AppendObject(const QString& qsObjectName);

Remarks

The data to upload are taken from either the stream set using SetUploadStream or ObjectData (whichever data are found first, when checked in that order).

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

BucketExists Method (S3 Class)

This method checks whether the bucket exists.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int BucketExists();

Unicode (Windows)
INT BucketExists();

int cloudstorage_s3_bucketexists(void* lpObj);

bool BucketExists();

Remarks

This method checks whether the bucket specified by Bucket exists, returning true if so or false if not.

Note: When ServiceProvider is spLinode (9), this method considers only buckets located in the currently selected Region. Refer to the Linode section of the Region property's documentation for more information.

Error Handling (C++)

This method returns a Boolean value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

CheckVersioningEnabled Method (S3 Class)

This method checks whether versioning is enabled for the currently selected bucket.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int CheckVersioningEnabled();

Unicode (Windows)
INT CheckVersioningEnabled();

int cloudstorage_s3_checkversioningenabled(void* lpObj);

bool CheckVersioningEnabled();

Remarks

This method can be used to check whether the bucket currently selected by Bucket has versioning enabled.

Note: If Bucket is empty, or refers to a bucket that does not exist, this property will always return false when queried, and any attempts to set it will fail. This behavior also occurs if the currently selected service provider does not support versioning at all.

Refer to Amazon's Versioning documentation for more information about versioning.

Note: When ServiceProvider is spBackblazeB2 (4), this property will always return true (assuming Bucket is nonempty), and any attempt to change it will fail; Backblaze B2 buckets are always versioned.

Error Handling (C++)

This method returns a Boolean value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

CompleteMultipartUpload Method (S3 Class)

This method completes a multipart upload by assembling previously uploaded parts.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int CompleteMultipartUpload(const char* lpszObjectName, const char* lpszUploadId);

Unicode (Windows)
INT CompleteMultipartUpload(LPCWSTR lpszObjectName, LPCWSTR lpszUploadId);

int cloudstorage_s3_completemultipartupload(void* lpObj, const char* lpszObjectName, const char* lpszUploadId);

int CompleteMultipartUpload(const QString& qsObjectName, const QString& qsUploadId);

Remarks

This method completes the multipart upload specified by UploadId. The server will assemble all of the parts that have been uploaded into an object named ObjectName.

Note: This method automatically calls ListParts internally to obtain the information needed to complete the multipart upload. This process does not alter the Parts* properties, nor does it cause the PartList event to fire. The spCloudflareR2 (10) ServiceProvider does not support the ListParts S3 operation; thus, when that provider is selected, this method instead relies on the part information contained in the PartInfo[i] configuration setting.

Note: This method is not supported when ServiceProvider is spGoogleStorage (2). Google Cloud Storage does not support multipart uploads.

Error Handling (C++)

This method returns a result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message. (Note: This method's result code can also be obtained by calling the GetLastErrorCode() method after it returns.)

Config Method (S3 Class)

Sets or retrieves a configuration setting.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
char* Config(const char* lpszConfigurationString);

Unicode (Windows)
LPWSTR Config(LPCWSTR lpszConfigurationString);

char* cloudstorage_s3_config(void* lpObj, const char* lpszConfigurationString);

QString Config(const QString& qsConfigurationString);

Remarks

Config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Error Handling (C++)

This method returns a String value; after it returns, call the GetLastErrorCode() method to obtain its result code; 0 indicates success, while a non-zero error code indicates that this method encountered an error during its execution. If an error occurs, the GetLastError() method can be called to retrieve the associated error message.

CopyObject Method (S3 Class)

This method copies an object.

Syntax

• C++
• C
• Qt

ANSI (Cross Platform)
int CopyObject(const char* lpszSrcObjectName, const char* lpszDestBucket, const char* lpszDestObjectName);

Unicode (Windows)
INT CopyObject(LPCWSTR lpszSrcObjectName, LPCWSTR lpszDestBucket, LPCWSTR lpszDestObjectName);

int cloudstorage_s3_copyobject(void* lpObj, const char* lpszSrcObjectName, const char* lpszDestBucket, const char* lpszDestObjectName);

int CopyObject(const QString& qsSrcObjectName, const QString& qsDestBucket, const QString& qsDestObjectName);

Remarks

This method copies the object specified by SrcObjectName (in the bucket currently selected by Bucket) to the object specified by DestObjectName in DestBucket. If DestBucket is empty, the bucket specified by Bucket is used as the destination bucket.

If the VersionId property is nonempty, the specified version of the source object will be used as the copy source. In this case, DestObjectName may be the same as SrcObjectName to "promote" the version, copying its contents back to the base object.