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IPWorks 2022 Qt Edition

Version 22.0 [Build 8171]

MIME Class

Properties   Methods   Events   Configuration Settings   Errors  

The MIME class allows for the simple encoding and decoding of MIME structures such as message attachments, file uploads, etc.

Syntax

MIME

Remarks

The class may be used for decoding or encoding of messages. Message holds the content of the encoded message or the filename which holds the encoded data. The decoded data is provided in Parts properties.

To decode a MIME message you should first assign either the whole message (headers and body) to Message or put the message headers into the MessageHeaders property and the message body or the filename holding it into the Message property. Calling DecodeFromFile or DecodeFromString directs the class to start parsing the message: it will fill out the ContentType, ContentTypeAttr properties with message content type information, and enter information about message parts into the Parts properties, which includes: part sizes, part content types, part content type attributes, part content disposition, part content disposition attributes, part encoding, part name, part filename, part headers, or part content (part decoded string or part decoded file) for each decoded part.

Calling the DecodeFromString or DecodeFromFile to decode doesn't actually decode the message but only parses it. The real decoding is done when the part content in the Parts properties is first accessed.

To encode data into a MIME message you should first assign values for each part to either part decoded string or part decoded file in the Parts properties property, and optionally assign values to the other part attributes in the Parts properties. Assigning a value to the part decoded string or part decoded file through the Parts properties, fills out automatically the part headers into the Parts properties for the respective part. Calling EncodeToFile or EncodeToString directs the class to fill out the Message with the message body and the MessageHeaders with the headers.

The Progress event is fired as the message is parsed and the data is decoded/encoded.

Property List


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

BoundaryThe boundary separating the MIME parts. Maximum length of 80 bytes.
ContentTypeThe value of the content-type header of the message which was encoded/decoded.
ContentTypeAttrThe attributes for content-type header of the message which was encoded/decoded.
MessageContains the encoded message text or a path to a file which contains the encoded message text.
MessageHeaderCountThe number of records in the MessageHeader arrays.
MessageHeaderFieldThis property contains the name of the HTTP header (same case as it is delivered).
MessageHeaderValueThis property contains the header contents.
MessageHeadersStringString version of the MIME message headers.
PartCountThe number of records in the Part arrays.
PartContentDispositionContent disposition for each part.
PartContentDispositionAttrThe content disposition's attribute (if any) for each part.
PartContentIdContent identifier for each part.
PartContentTypeContent type for each part.
PartContentTypeAttrThe content type attribute, if any, for each part.
PartDecodedFileThe filename with the decoded data.
PartDecodedStringThis property holds the actual content of each part.
PartEncodingThis property contains the actual content encoding type for each part.
PartFilenameThis property contains the filename attribute specified in the headers of the part.
PartHeadersThis property contains the headers for each MIME part.
PartNameThis property contains the name given to a part, such as the filename.
PartSizeThis property contains the size of the DecodedFile or DecodedString .

Method List


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

ConfigSets or retrieves a configuration setting.
DecodeFromFileDecodes from file.
DecodeFromStringDecodes from string.
DecodePartDecodes the specified part.
DecodePartToFileDecodes the specified part to a file on disk.
EncodeToFileEncodes to file.
EncodeToStringEncodes to string.
ResetReset the class.
ResetDataResets the values of all headers and Part- properties.

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.

ErrorInformation about errors during data delivery.
HeaderFired every time a header is parsed.
ProgressShows the progress of decoding/encoding the input data.

Configuration Settings


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

DecodeMessageHeadersInstructs the class to automatically decode message headers.
IncludeHeadersTells the class whether to include the headers when encoding the message.
RequireVersionHeaderSpecifies whether or not the class should require the version header.
SanitizeFilenameWhether invalid characters are replaced in MIME part filenames.
TempFilePathIf set, the temporary files created during MIME decoding and encoding will be put in the path specified.
BuildInfoInformation about the product's build.
CodePageThe system code page used for Unicode to Multibyte translations.
LicenseInfoInformation about the current license.
UseInternalSecurityAPITells the class whether or not to use the system security libraries or an internal implementation.

Boundary Property (MIME Class)

The boundary separating the MIME parts. Maximum length of 80 bytes.

Syntax

QString GetBoundary();
int SetBoundary(QString qsBoundary);

Default Value

""

Remarks

This property contains the boundary separating the MIME parts and has a maximum length of 80 bytes. The class will automatically generate a random boundary value during encoding if no value is given. During decoding this property is filled with the boundary from the actual MIME message.

The class will truncate any string longer than 80 bytes if assigned to Boundary.

Data Type

String

ContentType Property (MIME Class)

The value of the content-type header of the message which was encoded/decoded.

Syntax

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

Default Value

""

Remarks

This property contains the value of the content-type header of the message which was encoded/decoded. The class filters it out from the MessageHeaders. It shows the user about the type of the parts and their relation to each other.

The content-type attributes such as filename, boundary, charset etc are held in this property.

Data Type

String

ContentTypeAttr Property (MIME Class)

The attributes for content-type header of the message which was encoded/decoded.

Syntax

QString GetContentTypeAttr();
int SetContentTypeAttr(QString qsContentTypeAttr);

Default Value

""

Remarks

This property contains content-type attributes such as "filename", "boundary", "charset", etc.

Data Type

String

Message Property (MIME Class)

Contains the encoded message text or a path to a file which contains the encoded message text.

Syntax

QByteArray GetMessage();
int SetMessage(QByteArray qbaMessage);

Default Value

""

Remarks

This property contains the encoded message text or a path to a file which contains the encoded message text. The class fills out this property with the message body and MessageHeaders during encoding. The user may assign both the headers and the body to this property and leave MessageHeaders empty before decoding.

This property is not available at design time.

Data Type

Byte Array

MessageHeaderCount Property (MIME Class)

The number of records in the MessageHeader arrays.

Syntax

int GetMessageHeaderCount();
int SetMessageHeaderCount(int iMessageHeaderCount);

Default Value

0

Remarks

This property controls the size of the following arrays:

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

This property is not available at design time.

Data Type

Integer

MessageHeaderField Property (MIME Class)

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

Syntax

QString GetMessageHeaderField(int iMessageHeaderIndex);
int SetMessageHeaderField(int iMessageHeaderIndex, QString qsMessageHeaderField);

Default Value

""

Remarks

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

The MessageHeaderIndex parameter specifies the index of the item in the array. The size of the array is controlled by the MessageHeaderCount property.

This property is not available at design time.

Data Type

String

MessageHeaderValue Property (MIME Class)

This property contains the header contents.

Syntax

QString GetMessageHeaderValue(int iMessageHeaderIndex);
int SetMessageHeaderValue(int iMessageHeaderIndex, QString qsMessageHeaderValue);

Default Value

""

Remarks

This property contains the Header contents.

The MessageHeaderIndex parameter specifies the index of the item in the array. The size of the array is controlled by the MessageHeaderCount property.

This property is not available at design time.

Data Type

String

MessageHeadersString Property (MIME Class)

String version of the MIME message headers.

Syntax

QString GetMessageHeadersString();
int SetMessageHeadersString(QString qsMessageHeadersString);

Default Value

""

Remarks

The component fills out MessageHeadersString upon encoding. The user should use them as additional headers when emailing the Message.

This property contains a string version of the MIME message headers. During decoding, if this property is empty the class will try to find the headers in the beginning of the Message and will fill out this property accordingly.

Data Type

String

PartCount Property (MIME Class)

The number of records in the Part arrays.

Syntax

int GetPartCount();
int SetPartCount(int iPartCount);

Default Value

0

Remarks

This property controls the size of the following arrays:

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

This property is not available at design time.

Data Type

Integer

PartContentDisposition Property (MIME Class)

Content disposition for each part.

Syntax

QString GetPartContentDisposition(int iPartIdx);
int SetPartContentDisposition(int iPartIdx, QString qsPartContentDisposition);

Default Value

""

Remarks

Content disposition for each part.

The value in this property is used in the Content-Disposition header. Typical values include "form-data", "attachment" etc. The class fills it out each time the PartDecodedFile is changed. Changing the PartContentDisposition recalculates the PartHeaders as well.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartContentDispositionAttr Property (MIME Class)

The content disposition's attribute (if any) for each part.

Syntax

QString GetPartContentDispositionAttr(int iPartIdx);
int SetPartContentDispositionAttr(int iPartIdx, QString qsPartContentDispositionAttr);

Default Value

""

Remarks

The content disposition's attribute (if any) for each part.

Typical values for this property are the names of the form-variables while creating an HTTP post, values for filenames etc.

Setting this property recalculates the PartHeaders.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartContentId Property (MIME Class)

Content identifier for each part.

Syntax

QString GetPartContentId(int iPartIdx);
int SetPartContentId(int iPartIdx, QString qsPartContentId);

Default Value

""

Remarks

Content identifier for each part. The value of this property is used in the Content-Id header. The class fills it out each time the PartDecodedFile is changed. Changing This property recalculates the PartHeaders as well.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartContentType Property (MIME Class)

Content type for each part.

Syntax

QString GetPartContentType(int iPartIdx);
int SetPartContentType(int iPartIdx, QString qsPartContentType);

Default Value

""

Remarks

Content type for each part. The value of this property is used in the Content-Type header. Typical values include "image/gif", "text/plain" etc. The class fills it out each time the PartDecodedFile is changed. Changing This property recalculates the PartHeaders as well.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartContentTypeAttr Property (MIME Class)

The content type attribute, if any, for each part.

Syntax

QString GetPartContentTypeAttr(int iPartIdx);
int SetPartContentTypeAttr(int iPartIdx, QString qsPartContentTypeAttr);

Default Value

""

Remarks

The content type attribute, if any, for each part. Setting this recalculates the PartHeaders as well.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartDecodedFile Property (MIME Class)

The filename with the decoded data.

Syntax

QString GetPartDecodedFile(int iPartIdx);
int SetPartDecodedFile(int iPartIdx, QString qsPartDecodedFile);

Default Value

""

Remarks

The filename with the decoded data. Accessing this property for the first time after calling the DecodeFromString or DecodeFromFile method, directs the class to actually decode the part and save the data in a temporary file. The user is responsible for deleting the temporary file.

Setting a value to PartDecodedFile directs the component to calculate the file size and fill out the respective PartSize.

Note: It is recommended to use the DecodePartToFile method instead of querying this property.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartDecodedString Property (MIME Class)

This property holds the actual content of each part.

Syntax

QByteArray GetPartDecodedString(int iPartIdx);
int SetPartDecodedString(int iPartIdx, QByteArray qbaPartDecodedString);

Default Value

""

Remarks

This property holds the actual content of each part. The class decodes the actual part of Message to PartDecodedString when PartDecodedString's value is first queried.

Setting a value to PartDecodedString fills out the corresponding PartSize with the string size if the corresponding PartDecodedFile is empty.

The class checks during encoding first PartDecodedFile: if it is empty then the class uses the value of PartDecodedString.

Note: It is recommended to use the DecodePart method instead of querying this property.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

Byte Array

PartEncoding Property (MIME Class)

This property contains the actual content encoding type for each part.

Syntax

int GetPartEncoding(int iPartIdx);
int SetPartEncoding(int iPartIdx, int iPartEncoding);

Possible Values

PE_7BIT(0), 
PE_QUOTED_PRINTABLE(1),
PE_BASE_64(2),
PE_8BIT(3),
PE_BINARY(4),
PE_UUENCODE(5)

Default Value

0

Remarks

This property contains the actual content encoding type for each part. This property determines how to encode the data or how they were actually encoded in the Message as specified in the Content-Transfer-Encoding header.

Possible values for the this property are:

pe7bit (0)7 Bit data, no encoding.
peQuotedPrintable (1)Quoted-Printable encoding of (typically) text.
peBase64 (2)Base64 encoding of binary data.
pe8Bit (3)No encoding, 8 Bit characters may be contained as well.
peBinary (4)Binary data without any encoding. Similar to 3 (8 Bit encoding).
peUUEncode (5)Uuencoding of binary data.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

Integer

PartFilename Property (MIME Class)

This property contains the filename attribute specified in the headers of the part.

Syntax

QString GetPartFilename(int iPartIdx);
int SetPartFilename(int iPartIdx, QString qsPartFilename);

Default Value

""

Remarks

This property contains the filename attribute specified in the headers of the part. Changing the value of the corresponding PartDecodedFile sets automatically the PartFilename and consequently the PartHeaders.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartHeaders Property (MIME Class)

This property contains the headers for each MIME part.

Syntax

QString GetPartHeaders(int iPartIdx);
int SetPartHeaders(int iPartIdx, QString qsPartHeaders);

Default Value

""

Remarks

This property contains the headers for each MIME part. The class fills out this property each time any of the other corresponding Part- properties is changed. If additional headers are needed, they should be appended after all the other corresponding Part- properties are set.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartName Property (MIME Class)

This property contains the name given to a part, such as the filename.

Syntax

QString GetPartName(int iPartIdx);
int SetPartName(int iPartIdx, QString qsPartName);

Default Value

""

Remarks

This property contains the name given to a part, such as the filename. Changing the value of PartDecodedFile sets automatically the corresponding PartName and consequently the PartHeaders.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

This property is not available at design time.

Data Type

String

PartSize Property (MIME Class)

This property contains the size of the DecodedFile or DecodedString .

Syntax

int GetPartSize(int iPartIdx);

Default Value

0

Remarks

This property contains the size of the PartDecodedFile or PartDecodedString. If a non empty value is assigned to PartDecodedFile, then class fills out the corresponding PartSize with the file size or an error occurs if the file doesn't exist.

If the PartDecodedFile is empty and a value is assigned to PartDecodedString, then the corresponding PartSize will be equal to the string's size.

During decoding, this property is filled with the size of that part.

The PartIdx parameter specifies the index of the item in the array. The size of the array is controlled by the PartCount property.

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

Data Type

Integer

Config Method (MIME Class)

Sets or retrieves a configuration setting.

Syntax

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

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.

DecodeFromFile Method (MIME Class)

Decodes from file.

Syntax

int DecodeFromFile();

Remarks

This method decodes the data file given in Message and optionally MessageHeaders and fills out the Parts properties for each decoded part.

Example (Decoding From File)

MIMEControl.Message = "C:\filename.txt" MIMEControl.DecodeFromFile

Here, C:\filename.txt must contain the MIME headers and body. If not, the MessageHeaders property must also be set to the appropriate MIME headers.

Error Handling

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.)

DecodeFromString Method (MIME Class)

Decodes from string.

Syntax

int DecodeFromString();

Remarks

This method decodes from string. Same as DecodeFromFile, but now the Message denotes the real encoded message rather than a filename.

This method decodes the data given in Message and optionally MessageHeaders and fills out the Parts properties.

Example (Decoding Mail Message)

MIMEControl.MessageHeadersString = MailControl.MessageHeaders MIMEControl.Message = MailControl.MessageText MIMEControl.DecodeFromString

Error Handling

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.)

DecodePart Method (MIME Class)

Decodes the specified part.

Syntax

QByteArray DecodePart(int iindex);

Remarks

This method decodes the part specified by Index and returns the decoded part data.

DecodeFromString or DecodeFromFile must be called before calling this method. Calling this method will return the decoded bytes, and in addition the PartDecodedString property will be populated with the string representation of the decoded data.

For instance: mime.MessageHeadersString = myMessageHeaders; mime.Message = myMessageBody; mime.DecodeFromString(); byte[] myPartContent = await mime.DecodePart(0);

Error Handling

This method returns a Binary 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.

DecodePartToFile Method (MIME Class)

Decodes the specified part to a file on disk.

Syntax

QString DecodePartToFile(int iindex);

Remarks

This method decodes the part specified by Index to a temporary file. The full path to the temporary file is returned by this method. The user is responsible for deleting the temporary file.

DecodeFromString or DecodeFromFile must be called before calling this method.

Error Handling

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.

EncodeToFile Method (MIME Class)

Encodes to file.

Syntax

int EncodeToFile();

Remarks

This method encodes the data given in Parts properties (either decoded file or decoded string) into a MIME message at Message and MessageHeaders using the values optionally given in Parts properties. To encode several objects into a MIME envelope, the user should first clear any old values left in the Parts properties.

The class will check for each item in Parts properties (first decoded file and then the decoded string) for the data to encode.

The encoded message will be saved in the file pointed to by Message; the message headers will be held by MessageHeaders.

Example (Encoding Data)

MIMEControl.ResetData() MIMEControl.PartCount = 2 MIMEControl.PartDecodedString(0) = "This is plain text data" MIMEControl.PartEncoding(0) = peQuotedPrintable MIMEControl.PartContentType(0) = "text/plain" MIMEControl.PartDecodedFile(1) = "C:\filename.txt" MIMEControl.Message = "temp.tmp" MIMEControl.EncodeToFile()

Error Handling

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.)

EncodeToString Method (MIME Class)

Encodes to string.

Syntax

int EncodeToString();

Remarks

This method encodes to string. Same as EncodeToFile but the encoded data is held in the Message property rather than saved to a file.

This method encodes the data given in Parts properties into a MIME message. The Message gets stored in Message and MessageHeaders using the values optionally given in Parts properties. To encode several objects into a MIME envelope, the user should first clear any old values left in the Parts properties by calling ResetData.

The class will check each item in Parts properties (first decoded file and then decoded string) for the data to encode.

The encoded message will be stored in the Message property; the message headers will be held by MessageHeaders.

Example (Encoding Data)

MIMEControl.ResetData() MIMEControl.PartCount = 2 MIMEControl.PartDecodedString(0) = "This is plain text data" MIMEControl.PartEncoding(0) = peQuotedPrintable MIMEControl.PartContentType(0) = "text/plain" MIMEControl.PartDecodedFile(1) = "C:\filename.txt" MIMEControl.EncodeToString()

Error Handling

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.)

Reset Method (MIME Class)

Reset the class.

Syntax

int Reset();

Remarks

This method will reset the class's properties to their default values.

Error Handling

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.)

ResetData Method (MIME Class)

Resets the values of all headers and Part- properties.

Syntax

int ResetData();

Remarks

This method resets the values of all headers and Part- properties. It is an easy way to reset the class's properties before starting to populate the Part- properties with new values.

Error Handling

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.)

Error Event (MIME Class)

Information about errors during data delivery.

Syntax

class MIMEErrorEventParams {
public:
  int ErrorCode();

  const QString &Description();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Error(MIMEErrorEventParams *e);
// Or, subclass MIME and override this emitter function. virtual int FireError(MIMEErrorEventParams *e) {...}

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the class fails with an error.

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 Error Codes section.

Header Event (MIME Class)

Fired every time a header is parsed.

Syntax

class MIMEHeaderEventParams {
public:
  int PartIndex();

  const QString &Field();

  const QByteArray &Value();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Header(MIMEHeaderEventParams *e);
// Or, subclass MIME and override this emitter function. virtual int FireHeader(MIMEHeaderEventParams *e) {...}

Remarks

The PartIndex parameter contains the index of the part containing the current header. If the header is from the MIME body, this value will be -1. The Field parameter contains the name of the MIME header. The Value parameter contains the header contents. The Header event is fired when a header is parsed, which occurs for each header of the Message when DecodeFromFile, DecodeFromString, or DecodeFromStream is called.

Progress Event (MIME Class)

Shows the progress of decoding/encoding the input data.

Syntax

class MIMEProgressEventParams {
public:
  int PercentDone();

  int EventRetVal();
  void SetEventRetVal(int iRetVal);
};
// To handle, connect one or more slots to this signal. void Progress(MIMEProgressEventParams *e);
// Or, subclass MIME and override this emitter function. virtual int FireProgress(MIMEProgressEventParams *e) {...}

Remarks

The Progress allows the user to visualize the progress of processing the input data.

The PercentDone parameter shows what percentage of the input has been read.

Configuration Settings (MIME Class)

The class 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 class, access to these internal properties is provided through the Config method.

MIME Configuration Settings

DecodeMessageHeaders:   Instructs the component to automatically decode message headers.

Message headers that have been Quoted-Printable or Base-64 encoded are automatically decoded when this configuration setting is True. The default value of this setting is False.

IncludeHeaders:   Tells the class whether to include the headers when encoding the message.

If true, the class will include the headers when EncodeToFile or EncodeToString are called. If false, only the message will be encoded.

The default value for IncludeHeaders is false.

RequireVersionHeader:   Specifies whether or not the class should require the version header.

If true, the class will require that the "MIME-Version" header be included in the MessageHeaders. If the header is not present during decoding, the component fails with an error. This config is false by default.

SanitizeFilename:   Whether invalid characters are replaced in MIME part filenames.

If True, the class will replace invalid characters with an underscore when decoding the MIME message. This applies to the filename held in the PartFilename property. When True the following characters are considered invalid:

  • \
  • /
  • "
  • :
  • ?
  • *
  • <
  • >
  • |
Any characters with ASCII values between 0-31 are also considered invalid. The default value is False.
TempFilePath:   If set, the temporary files created during MIME decoding and encoding will be put in the path specified.

The TempFilePath property sets the path at which the temporary files will be created.

Base Configuration Settings

BuildInfo:   Information about the product's build.

When queried, this setting will return a string containing information about the product's build.

CodePage:   The system code page used for Unicode to Multibyte translations.

The default code page is Unicode UTF-8 (65001).

The following is a list of valid code page identifiers:

IdentifierName
037IBM EBCDIC - U.S./Canada
437OEM - United States
500IBM EBCDIC - International
708Arabic - ASMO 708
709Arabic - ASMO 449+, BCON V4
710Arabic - Transparent Arabic
720Arabic - Transparent ASMO
737OEM - Greek (formerly 437G)
775OEM - Baltic
850OEM - Multilingual Latin I
852OEM - Latin II
855OEM - Cyrillic (primarily Russian)
857OEM - Turkish
858OEM - Multilingual Latin I + Euro symbol
860OEM - Portuguese
861OEM - Icelandic
862OEM - Hebrew
863OEM - Canadian-French
864OEM - Arabic
865OEM - Nordic
866OEM - Russian
869OEM - Modern Greek
870IBM EBCDIC - Multilingual/ROECE (Latin-2)
874ANSI/OEM - Thai (same as 28605, ISO 8859-15)
875IBM EBCDIC - Modern Greek
932ANSI/OEM - Japanese, Shift-JIS
936ANSI/OEM - Simplified Chinese (PRC, Singapore)
949ANSI/OEM - Korean (Unified Hangul Code)
950ANSI/OEM - Traditional Chinese (Taiwan; Hong Kong SAR, PRC)
1026IBM EBCDIC - Turkish (Latin-5)
1047IBM EBCDIC - Latin 1/Open System
1140IBM EBCDIC - U.S./Canada (037 + Euro symbol)
1141IBM EBCDIC - Germany (20273 + Euro symbol)
1142IBM EBCDIC - Denmark/Norway (20277 + Euro symbol)
1143IBM EBCDIC - Finland/Sweden (20278 + Euro symbol)
1144IBM EBCDIC - Italy (20280 + Euro symbol)
1145IBM EBCDIC - Latin America/Spain (20284 + Euro symbol)
1146IBM EBCDIC - United Kingdom (20285 + Euro symbol)
1147IBM EBCDIC - France (20297 + Euro symbol)
1148IBM EBCDIC - International (500 + Euro symbol)
1149IBM EBCDIC - Icelandic (20871 + Euro symbol)
1200Unicode UCS-2 Little-Endian (BMP of ISO 10646)
1201Unicode UCS-2 Big-Endian
1250ANSI - Central European
1251ANSI - Cyrillic
1252ANSI - Latin I
1253ANSI - Greek
1254ANSI - Turkish
1255ANSI - Hebrew
1256ANSI - Arabic
1257ANSI - Baltic
1258ANSI/OEM - Vietnamese
1361Korean (Johab)
10000MAC - Roman
10001MAC - Japanese
10002MAC - Traditional Chinese (Big5)
10003MAC - Korean
10004MAC - Arabic
10005MAC - Hebrew
10006MAC - Greek I
10007MAC - Cyrillic
10008MAC - Simplified Chinese (GB 2312)
10010MAC - Romania
10017MAC - Ukraine
10021MAC - Thai
10029MAC - Latin II
10079MAC - Icelandic
10081MAC - Turkish
10082MAC - Croatia
12000Unicode UCS-4 Little-Endian
12001Unicode UCS-4 Big-Endian
20000CNS - Taiwan
20001TCA - Taiwan
20002Eten - Taiwan
20003IBM5550 - Taiwan
20004TeleText - Taiwan
20005Wang - Taiwan
20105IA5 IRV International Alphabet No. 5 (7-bit)
20106IA5 German (7-bit)
20107IA5 Swedish (7-bit)
20108IA5 Norwegian (7-bit)
20127US-ASCII (7-bit)
20261T.61
20269ISO 6937 Non-Spacing Accent
20273IBM EBCDIC - Germany
20277IBM EBCDIC - Denmark/Norway
20278IBM EBCDIC - Finland/Sweden
20280IBM EBCDIC - Italy
20284IBM EBCDIC - Latin America/Spain
20285IBM EBCDIC - United Kingdom
20290IBM EBCDIC - Japanese Katakana Extended
20297IBM EBCDIC - France
20420IBM EBCDIC - Arabic
20423IBM EBCDIC - Greek
20424IBM EBCDIC - Hebrew
20833IBM EBCDIC - Korean Extended
20838IBM EBCDIC - Thai
20866Russian - KOI8-R
20871IBM EBCDIC - Icelandic
20880IBM EBCDIC - Cyrillic (Russian)
20905IBM EBCDIC - Turkish
20924IBM EBCDIC - Latin-1/Open System (1047 + Euro symbol)
20932JIS X 0208-1990 & 0121-1990
20936Simplified Chinese (GB2312)
21025IBM EBCDIC - Cyrillic (Serbian, Bulgarian)
21027Extended Alpha Lowercase
21866Ukrainian (KOI8-U)
28591ISO 8859-1 Latin I
28592ISO 8859-2 Central Europe
28593ISO 8859-3 Latin 3
28594ISO 8859-4 Baltic
28595ISO 8859-5 Cyrillic
28596ISO 8859-6 Arabic
28597ISO 8859-7 Greek
28598ISO 8859-8 Hebrew
28599ISO 8859-9 Latin 5
28605ISO 8859-15 Latin 9
29001Europa 3
38598ISO 8859-8 Hebrew
50220ISO 2022 Japanese with no halfwidth Katakana
50221ISO 2022 Japanese with halfwidth Katakana
50222ISO 2022 Japanese JIS X 0201-1989
50225ISO 2022 Korean
50227ISO 2022 Simplified Chinese
50229ISO 2022 Traditional Chinese
50930Japanese (Katakana) Extended
50931US/Canada and Japanese
50933Korean Extended and Korean
50935Simplified Chinese Extended and Simplified Chinese
50936Simplified Chinese
50937US/Canada and Traditional Chinese
50939Japanese (Latin) Extended and Japanese
51932EUC - Japanese
51936EUC - Simplified Chinese
51949EUC - Korean
51950EUC - Traditional Chinese
52936HZ-GB2312 Simplified Chinese
54936Windows XP: GB18030 Simplified Chinese (4 Byte)
57002ISCII Devanagari
57003ISCII Bengali
57004ISCII Tamil
57005ISCII Telugu
57006ISCII Assamese
57007ISCII Oriya
57008ISCII Kannada
57009ISCII Malayalam
57010ISCII Gujarati
57011ISCII Punjabi
65000Unicode UTF-7
65001Unicode UTF-8

The following is a list of valid code page identifiers for Mac OS only:

IdentifierName
1ASCII
2NEXTSTEP
3JapaneseEUC
4UTF8
5ISOLatin1
6Symbol
7NonLossyASCII
8ShiftJIS
9ISOLatin2
10Unicode
11WindowsCP1251
12WindowsCP1252
13WindowsCP1253
14WindowsCP1254
15WindowsCP1250
21ISO2022JP
30MacOSRoman
10UTF16String
0x90000100UTF16BigEndian
0x94000100UTF16LittleEndian
0x8c000100UTF32String
0x98000100UTF32BigEndian
0x9c000100UTF32LittleEndian
65536Proprietary

LicenseInfo:   Information about the current license.

When queried, this setting will return a string containing information about the license this instance of a class is using. It will return the following information:

  • Product: The product the license is for.
  • Product Key: The key the license was generated from.
  • License Source: Where the license was found (e.g., RuntimeLicense, License File).
  • License Type: The type of license installed (e.g., Royalty Free, Single Server).
UseInternalSecurityAPI:   Tells the class whether or not to use the system security libraries or an internal implementation.

By default the class will use the system security libraries to perform cryptographic functions. Setting this to True tells the class to use the internal implementation instead of using the system's security API.

Trappable Errors (MIME Class)

MIME Errors

3   Can't create the file for write (illegal name or disk is write-protected).
4   Can't open the file for read (doesn't exist?).
5   Can't read from file.
6   Can't write to file (disk full?).
280   Invalid Part Index.
281   Unknown MIME type.
282   No MIME-boundary found.
283   No file given.
284   The class is busy.
285   Could not create a temporary file to decode the data.
286   Can't read Message file.
287   No header separator found.
289   No separator found.
290   Input stream must have seeking enabled.

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IPWorks 2022 Qt Edition - Version 22.0 [Build 8171]