Class MImURITranslator

class MImURITranslator;

Description

Translates a URI in an MHTML message into a message body part file name.

MHTML messages may contain multiple HTML body parts. Each of these body parts is able to reference another body part within the same multipart structure, or a body part within a parent multipart structure [RFC2110]. These references are called URI's.

When an MHTML message is parsed by the message engine, the HTML body of each part is stored as a binary file. This interface provides a means of finding the file name of the body part that corresponds to a given a URI.

The URI resolving process has the potential to become time consuming, therefore it is broken into two steps:

Resolve asynchronously the relative URI into an absolute URI. The message body parts are recursively searched in order to find an absolute base for the relative URI [RFC2110, RFC1808].

Once a relative URI has been resolved in to an absolute URI, then the message is searched for a body part that corresponds to it [RFC2110].

If no matching body part can be found, then the absolute URI is returned to the caller in place of the filename. This absolute URI should be used to search for the required data externally, for example by using HTTP.

Members

Defined in MImURITranslator:
FindUniversalResourceIdentifierFileHandleL(), FindUniversalResourceIdentifierL(), GetUniversalResourceIdentifierFileHandle(), GetUniversalResourceIdentifierL()

See also:

• CImEmailMessage

virtual void FindUniversalResourceIdentifierL(TMsvId aMessageId, const TDesC &rBase, const TDesC &rURI, TRequestStatus &aStatus)=0;

Description

Starts an asynchronous operation to resolve a specified URI.

Parameters

TMsvId aMessageId The ID of the body part containing the URI which is to be resolved. CImEmailMessage::FindFirstHTMLPageL() can be used to find the aMessageId parameter for the first HTML page in a message. const TDesC &rBase The base parameter from the HTML part that contains the URI to be resolved. If there is no base parameter in the HTML, then an empty descriptor should be passed in. const TDesC &rURI The URI to be resolved. TRequestStatus &aStatus Asynchronous status word

virtual HBufC *GetUniversalResourceIdentifierL(TMsvId &aLinkedEntryId, TBool &aFileFound) const=0;

Description

Gets the results after a search.

Parameters

TMsvId &aLinkedEntryId On return, the message ID of the linked body part, providing one is found. Note that you should keep a record of the returned message ID as it is required for resolving any URI's that may be found in the linked body part. TBool &aFileFound On return, true if a linked body part has been found. It is set to false otherwise.

Return value

HBufC * If successful, the filename that corresponds to the URI, or the absolute URI if no matching file can be found. If failed, NULL.

virtual void FindUniversalResourceIdentifierFileHandleL(TMsvId aMessageId, const TDesC &aBase, const TDesC &aURI, TRequestStatus &aStatus)=0;

Description

Starts an asynchronous operation to resolve a specified URI.

Parameters

TMsvId aMessageId The ID of the body part containing the URI which is to be resolved. CImEmailMessage::FindFirstHTMLPageFileHandleL() can be used to find the aMessageId parameter for the first HTML page in a message. const TDesC &aBase The base parameter from the HTML part that contains the URI to be resolved. If there is no base parameter in the HTML, then an empty descriptor should be passed in. const TDesC &aURI The URI to be resolved. TRequestStatus &aStatus Asynchronous status word

virtual TInt GetUniversalResourceIdentifierFileHandle(TMsvId &aLinkedEntryId, RFile &aFile) const=0;

Description

Gets the results after a search.

Parameters

TMsvId &aLinkedEntryId On return, the message ID of the linked body part, providing one is found. Note that you should keep a record of the returned message ID as it is required for resolving any URI's that may be found in the linked body part. RFile &aFile On return, the file handle corresponding to the URI if successful. If not successful, then this is not valid.

Return value

TInt KErrNone if successful and therefore aFile contains the filehandle that corresponds to the URI. An error code if unsuccessful and therefore aFile is not valid.