Since switch to async we don't have spurious "database is busy"
errors anymore. Since an error is irrecoverable in most cases,
we can skip the message. The cost of this is we may
accidentally skip a correct message if I/O fails, but
the advantage is that we are guaranteed to never confuse
irrecoverable error with recoverable one and get stuck in
infinite loop redownloading the same message over and over.
That's a bug which @Simon-Laux and probably also @hpk42 had, where one malformed incoming (Spam-) mail blocked the receiving of all emails coming after it.
The problem was that from_field_to_contact_id() returned ContactId::UNDEFINED, and then lookup_by_contact() returned Err.
* Treat multiple From addresses as if there was no From: addr
* changelog
* Don't send invalid emails through the whole receive_imf pipeline
Instead, directly create a trash entry for them.
* Don't create trash entries for randomly generated Message-Id's
* clippy
* fix typo
Co-authored-by: link2xt <link2xt@testrun.org>
Seems like consume_events() didn't work properly, i.e. in some cases it
didn't see the latest events and failed to consume them. So, the
IncomingMsg event from receiving DC_MAILINGLIST stayed in the events
channel, which made this fail:
```rust
// Check that no notification is displayed for blocked mailing list message.
while let Ok(event) = t.evtracker.try_recv() {
assert!(!matches!(event.typ, EventType::IncomingMsg { .. }));
}
```
Fix it by explicitly waiting for the first IncomingMsg event.
This way no temporary rows are created and it is easier to maintain
because UPDATE statement is right below the INSERT statement,
unlike `merge_messages` function which is easy to forget about.
* save webxdc-updates for not yet downloaded messages, that are probably webxdc instances then
* test webxdc updates received while instance is not yet downloaded
* keep msg_id on downloading messages
keeping msg_id on downloading messages
has the advantage that webxdc updates and other references to the msg_id
can be processed as usual.
if a message expands to multiple msg_id,
the last one is kept,
however, this does not affect webxdc at all.
(alternatives may be to update `msgs_status_updates`
but that seems more complicated and even less elegant,
another alternative would be to use different keys (eg. `rfc274_mid`),
but that also seems not to be much easier and would waste space as well.
also both alternatives would need adaption for other foreign keys)
* update CHANGELOG
* do not emit WebxdcStatusUpdate event in case the message is not yet downloaded
* move DELETE/UPDATE to an transaction
* make merge_msg_id() a little less confusing
* use some webxdc-update-param from placeholder
(the placeholder may be updated,
the just downloaded messages is not)
* more precise function name
* test not directly downloading status updates
* test not directly downloading mdn
