Email class: add attachment from string

[eluser]Arjen van Bochoven[/eluser]
Maybe a feature request item:

I found it is not possible sending email atttachments that are not files. I want to send a .csv file that is generated from form data. I found it somewhat clunky to generate an intermediary file to get the attachment to be sent. It would be nice if the CI email class would accept a string or array as attachment.

Something like:

Code:

$this->email->addstringattachment( string, filename )

It is hard to subclass Email.php to add this feature because fetching file attachments is hardcoded into _build_message().

Anyone solved this?