fMultipartBoundary
BString fMultipartBoundary;
fMultipartBoundary(other.fMultipartBoundary)
result << "--" << fMultipartBoundary << "--\r\n";
return fMultipartBoundary;
result << fMultipartBoundary << "--\r\n";
contentLength += fMultipartBoundary.Length() + 6;
fMultipartBoundary = "----------------------------";
fMultipartBoundary << (char)(rand() % 10 + '0');
result << "--" << fMultipartBoundary << "\r\n";