MIME and Internationalized Messages
The MIME package supports the creation of messages in character sets beyond just US-ASCII. When combined with the Internationalization Module of SourcePro Core, they provide a complete solution for creating MIME messages for other character sets.
Example 33 illustrates the use of MIME with the Internationalization Module.
NOTE >> The following example uses classes from the Internationalization Module of SourcePro Core. For more information on the Internationalization Module, refer to the
Internationalization Module User’s Guide and
SourcePro C++ API Reference Guide.
Example 33 – Using MIME with the Internationalization Module
// Create the subject and body of the MIME message.
RWCString subject("Hello World");
RWCString body("This is the message body.");
// Create strings representing the charsets we're
// working in.
RWCString origCharset("US-ASCII");
RWCString newCharset("UTF-16");
// Create a string representing the transfer encoding.
RWCString transferEncoding("base64");
// Create unicode converts for converting to and from
// RWUStrings.
RWUToUnicodeConverter toUnicode(origCharset);
RWUFromUnicodeConverter fromUnicode(newCharset);
// Convert our original strings in RWUStrings.
RWUString uSubject(subject, toUnicode);
RWUString uBody(body, toUnicode);
// Convert the ustrings to RWCString buffers of the
// appropriate encoding.
RWCString nSubject = uSubject.toBytes(fromUnicode);
RWCString nBody = uBody.toBytes(fromUnicode);
// Construct a MIME Subject header.
nSubject = RWMimeUtils::headerEncode(nSubject, newCharset, "B");
RWMimeGenericHeader subjectHeader("Subject", nSubject);
// Construct a MIME Part, with an appropriate content type.
RWMimePart message(RWMimeTextType("plain", newCharset));
// Associate the headers with the MIME part.
message.insertHeader(subjectHeader);
message.insertHeader(RWMimeVersionHeader());
message.insertHeader(RWMimeContentTransferEncodingHeader(transferEncoding));
// Associate the body with the MIME part.
nBody = RWMimeUtils::encode(nBody, transferEncoding);
message.setBody(nBody);
cout << message.asString() << endl;