Re: [gmime-devel] Help appreciated adding attachments to outgoing mails

[Jeffrey Stedfast <fejj gnome org>]

On 8/11/2013 12:18 PM, Steve Kemp wrote:
> ..
>
>    Having tried that I suspect something is going wrong, as the
>   resulting message is clearly bogus:
>
> --
> Subject: testing 3
> From: Steve Kemp <steve steve org uk>
> Content-Type: text/plain; charset=UTF-8
> MIME-Version: 1.0
> Content-Type: multipart/mixed; boundary="=-6d8Cd3fBeYCB69lh/Amd"
>
> --=-6d8Cd3fBeYCB69lh/Amd
>
> ontent-Type: text/plain; charset=UTF-8
> MIME-Versio
> --=-6d8Cd3fBeYCB69lh/Amd
> Content-Type: application/octet-stream; name=fstab
> Content-Disposition: attachment; filename=fstab
> Content-Transfer-Encoding: base64
>
> IyAvZXRjL2ZzdGFiOiBzdGF0aWMgZmlsZSBzeXN0ZW0gaW5mb3JtYXRpb24uCiMKIyBVc2UgJ2Js
> --
>
>    Note the weird "ontent-Type" and the version not being quite right.

Are you by any chance writing the message into the same filename as you 
parsed the simple message from?

That could explain this because, by default, for streams that are 
seekable like GMimeStreamFs, the GMimeParser will keep the content on 
disk and only load it on demand (i.e. when you go to write it out 
somewhere). If you write to the same file on disk, then it'll be reading 
and writing from the same file which could easily produce garbled output 
like the above.

You can solve this in 2 ways:

1. g_mime_parser_set_persist_stream (parser, FALSE);
2. write to a temp file and then use rename() to rename it back to the 
original filename.


If not, then it might be a bug in GMime... I'll have to investigate.


Jeff