MessageCompressor Component

Properties   Methods   Events   Config Settings   Errors  

The MessageCompressor component compresses data and stores it in the PKCS#7 format.

Syntax

TsbxMessageCompressor

Remarks

PKCS#7 (Public Key Cryptography Standard #7) is a common format used to store encrypted and signed data. It is used by a variety of protocols, including S/MIME and CMS.

Property List

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

Method List

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

Event List

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

Config Settings

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

CompressionLevel Property (MessageCompressor Component)

Compression level to apply (1-9).

Syntax

__property int CompressionLevel = { read=FCompressionLevel, write=FSetCompressionLevel };

Default Value

6

Remarks

Use this property to specify the compression level to use, from 1 (the lightest, but quickest) to 9 (the best, but the slowest).

Data Type

Integer

FIPSMode Property (MessageCompressor Component)

Reserved.

Syntax

__property bool FIPSMode = { read=FFIPSMode, write=FSetFIPSMode };

Default Value

false

Remarks

This property is reserved for future use.

Data Type

Boolean

InputBytes Property (MessageCompressor Component)

Use this property to pass the input to component in byte array form.

Syntax

__property DynamicArray InputBytes = { read=FInputBytes, write=FSetInputBytes };

Remarks

Assign a byte array containing the data to be processed to this property.

This property is not available at design time.

Data Type

Byte Array

InputFile Property (MessageCompressor Component)

Path to the source (uncompressed) file.

Syntax

__property String InputFile = { read=FInputFile, write=FSetInputFile };

Default Value

""

Remarks

Use this property to provide the compression source.

Data Type

String

OutputBytes Property (MessageCompressor Component)

Use this property to read the output the component object has produced.

Syntax

__property DynamicArray OutputBytes = { read=FOutputBytes };

Remarks

Read the contents of this property after the operation has completed to read the produced output. This property will only be set if the OutputFile and OutputStream properties had not been assigned.

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

Data Type

Byte Array

OutputFile Property (MessageCompressor Component)

Path to the destination (compressed) file.

Syntax

__property String OutputFile = { read=FOutputFile, write=FSetOutputFile };

Default Value

""

Remarks

Use this property to specify the file where the compressed PKCS#7 message is to be saved.

Data Type

String

Compress Method (MessageCompressor Component)

Compresses input data into a PKCS7 message.

Syntax

void __fastcall Compress();

Remarks

Call this method to compress the data residing provided via InputFile (or InputStream) and save the output in OutputFile (OutputStream).

Config Method (MessageCompressor Component)

Sets or retrieves a configuration setting.

Syntax

String __fastcall Config(String ConfigurationString);

Remarks

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

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, 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.

DoAction Method (MessageCompressor Component)

Performs an additional action.

Syntax

String __fastcall DoAction(String ActionID, String ActionParams);

Remarks

DoAction is a generic method available in every component. It is used to perform an additional action introduced after the product major release. The list of actions is not fixed, and may be flexibly extended over time.

The unique identifier (case insensitive) of the action is provided in the ActionID parameter.

ActionParams contains the value of a single parameter, or a list of multiple parameters for the action in the form of PARAM1=VALUE1;PARAM2=VALUE2;....

Error Event (MessageCompressor Component)

Information about errors during PKCS#7 message encryption.

Syntax

typedef struct {
  int ErrorCode;
  String Description;
} TsbxMessageCompressorErrorEventParams;
typedef void __fastcall (__closure *TsbxMessageCompressorErrorEvent)(System::TObject* Sender, TsbxMessageCompressorErrorEventParams *e);
__property TsbxMessageCompressorErrorEvent OnError = { read=FOnError, write=FOnError };

Remarks

The event is fired in case of exceptional conditions during message processing.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Messages section.

Notification Event (MessageCompressor Component)

This event notifies the application about an underlying control flow event.

Syntax

typedef struct {
  String EventID;
  String EventParam;
} TsbxMessageCompressorNotificationEventParams;
typedef void __fastcall (__closure *TsbxMessageCompressorNotificationEvent)(System::TObject* Sender, TsbxMessageCompressorNotificationEventParams *e);
__property TsbxMessageCompressorNotificationEvent OnNotification = { read=FOnNotification, write=FOnNotification };

Remarks

The component fires this event to let the application know about some event, occurrence, or milestone in the component. For example, it may fire to report completion of the document processing. The list of events being reported is not fixed, and may be flexibly extended over time.

The unique identifier of the event is provided in the EventID parameter. EventParam contains any parameters accompanying the occurrence. Depending on the type of the component, the exact action it is performing, or the document being processed, one or both may be omitted.

Config Settings (MessageCompressor Component)

The component accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

MessageCompressor Config Settings

Base Config Settings

Trappable Errors (MessageCompressor Component)

MessageCompressor Errors

	1048577   Invalid parameter value (SB_ERROR_INVALID_PARAMETER)
	1048578   Component is configured incorrectly (SB_ERROR_INVALID_SETUP)
	1048579   Operation cannot be executed in the current state (SB_ERROR_INVALID_STATE)
	1048580   Attempt to set an invalid value to a property (SB_ERROR_INVALID_VALUE)
	1048581   Certificate does not have its private key loaded (SB_ERROR_NO_PRIVATE_KEY)
	1048581   Cancelled by the user (SB_ERROR_CANCELLED_BY_USER)