Re: [gmime-devel] modifying a single header of a message on-disk

[Gaute Hope <eg gaute vetsj com>]

Excerpts from Gaute Hope's message of October 29, 2014 15:59:
> Are there any examples on how to modify a single header of an existing
> message without risking ending up with an inconsistent message? What
> would be the best way to go about it?

I spoke too soon, this seems to do the trick. Although, it seems like
gmime cleans up the message (a diff between the result and the original
does not just contain the modified header).


 GMimeStream * f = g_mime_stream_file_new_for_path (path.c_str(),
     "r");
 GMimeParser * parser = g_mime_parser_new_with_stream (f);
 GMimeMessage * message = g_mime_parser_construct_message (parser);
 g_mime_object_set_header (GMIME_OBJECT(message), "HeaderName", "headervalue");

 GMimeStream * out = g_mime_stream_file_new_for_path ("/tmp/testmsg", "w");
 g_mime_object_write_to_stream (GMIME_OBJECT(message), out);

 g_mime_stream_flush (out);
 g_mime_stream_close (out);

 g_object_unref (message);
 g_object_unref (parser);
 g_mime_stream_close (f);