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fix: fetch at most 100 existing messages even if EXISTS was not received

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According to RFC 3501, EXISTS must always be sent in response to SELECT.
But if the server does not send it for some reason,
async-imap uses the default value, so we will essentially fetch `1:*`
and downloading all messages may take a long time.
This commit is contained in:
link2xt
2023-05-08 10:59:15 +00:00
parent 2701c135db
commit c7a250da31
1 changed files with 2 additions and 2 deletions
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4
src/imap.rs
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@@ -1324,8 +1324,8 @@ impl Imap {
// Fetch last DC_FETCH_EXISTING_MSGS_COUNT (100) messages.
// Sequence numbers are sequential. If there are 1000 messages in the inbox,
// we can fetch the sequence numbers 900-1000 and get the last 100 messages.
let first = cmp::max(1, exists - DC_FETCH_EXISTING_MSGS_COUNT);
let set = format!("{first}:*");
let first = cmp::max(1, exists - DC_FETCH_EXISTING_MSGS_COUNT + 1);
let set = format!("{first}:{exists}");
let mut list = session
.fetch(&set, PREFETCH_FLAGS)
.await