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feat(imap): use CAPABILITY response code if LOGIN command returns it

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This saves one round trip during connection establishment
if the server returns capabilities in the LOGIN command response already.
This commit is contained in:
link2xt
2026-07-16 19:53:24 +00:00
committed by l
parent 17b32a17f5
commit aadd11a771
2 changed files with 47 additions and 12 deletions
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23
src/imap.rs
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@@ -387,19 +387,28 @@ impl Imap {
user: imap_user.into(),
access_token: token,
};
client.authenticate("XOAUTH2", auth).await
client
.authenticate("XOAUTH2", auth)
.await
.map(|session| (session, None))
} else {
info!(context, "Logging into IMAP server with LOGIN.");
client.login(imap_user, imap_pw).await
};
match login_res {
Ok(mut session) => {
let capabilities = match determine_capabilities(&mut session).await {
Ok(capabilities) => capabilities,
Err(err) => {
warn!(context, "Failed to determine capabilities: {err:#}.");
continue 'candidate;
Ok((mut session, login_capabilities_opt)) => {
let capabilities = if let Some(login_capabilities) = login_capabilities_opt {
login_capabilities
} else {
// OK response did not contain the CAPABILITY response code.
// Request capabilities explicitly.
match determine_capabilities(&mut session).await {
Ok(capabilities) => capabilities,
Err(err) => {
warn!(context, "Failed to determine capabilities: {err:#}.");
continue 'candidate;
}
}
};
let resync_request_sender = self.resync_request_sender.clone();