[imp] Attachment sizes and linked attachments

[Otto Stolz]

Hi,

Jan Schneider schrieb:
> the attachment size limits are applied no matter  
> if the attachments are sent with the message or as linked attachments.  
...
> Now, wouldn't it make sense to not use the same limits, or maybe even  
> not use any limits at all, if you send files as linked attachments?  

It would certainly make sense to provide separate size limits
for attachments and linked attachments. Normally, the size limit
for linked attachments would be much larger than the limit for
RFC-822 attachments.



As we had already a "File Transfer" service (akin to Imp's linked
attachments) in place, I had to modify imp/templates/compose/compose.inc
to adapt it to our situation (no linked attachments, rather a link
to our service). One reason not to allow linked attachments were
storage, and backup, considerations: Imp's upload drectory can be
kept small, and temporary (e. g. a RAM disk), when no linked attachments
need to be kept for days, or even weeks.

For sites like ours, some configurable backend, or hook interfaces,
for the linked attachments would come handy. It would be nice to exploit
Imp's user interface for the linked attachments (including a note on
the URL, in the message being composed), but still use some external
service for the actual storage (and later retrieval) of the files being
linked. I had not yet the time to think about the details of this
proposition, hence I haven't filed a formal enhancement request. Any
ideas?

Best wishes,
   Otto Stolz