746 lines
20 KiB
Go
746 lines
20 KiB
Go
// Copyright (c) 2024 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package imapsmtpserver
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import (
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"context"
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"fmt"
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"net"
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"path/filepath"
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"github.com/ProtonMail/gluon"
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"github.com/ProtonMail/gluon/async"
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"github.com/ProtonMail/gluon/connector"
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"github.com/ProtonMail/gluon/imap"
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"github.com/ProtonMail/gluon/logging"
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"github.com/ProtonMail/gluon/reporter"
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"github.com/ProtonMail/proton-bridge/v3/internal/events"
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"github.com/ProtonMail/proton-bridge/v3/internal/services/imapservice"
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bridgesmtp "github.com/ProtonMail/proton-bridge/v3/internal/services/smtp"
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"github.com/ProtonMail/proton-bridge/v3/internal/services/syncservice"
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"github.com/ProtonMail/proton-bridge/v3/pkg/cpc"
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"github.com/emersion/go-smtp"
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"github.com/sirupsen/logrus"
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)
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// Service manages the IMAP & SMTP servers and their listeners.
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type Service struct {
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requests *cpc.CPC
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imapServer *gluon.Server
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imapListener net.Listener
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smtpServer *smtp.Server
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smtpListener net.Listener
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smtpAccounts *bridgesmtp.Accounts
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smtpSettings SMTPSettingsProvider
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imapSettings IMAPSettingsProvider
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eventPublisher events.EventPublisher
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panicHandler async.PanicHandler
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reporter reporter.Reporter
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loadedUserCount int
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log *logrus.Entry
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tasks *async.Group
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uidValidityGenerator imap.UIDValidityGenerator
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telemetry Telemetry
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}
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func NewService(
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ctx context.Context,
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smtpSettings SMTPSettingsProvider,
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imapSettings IMAPSettingsProvider,
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eventPublisher events.EventPublisher,
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panicHandler async.PanicHandler,
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reporter reporter.Reporter,
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uidValidityGenerator imap.UIDValidityGenerator,
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telemetry Telemetry,
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) *Service {
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return &Service{
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requests: cpc.NewCPC(),
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smtpAccounts: bridgesmtp.NewAccounts(),
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panicHandler: panicHandler,
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reporter: reporter,
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smtpSettings: smtpSettings,
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imapSettings: imapSettings,
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eventPublisher: eventPublisher,
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log: logrus.WithField("service", "server-manager"),
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tasks: async.NewGroup(ctx, panicHandler),
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uidValidityGenerator: uidValidityGenerator,
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telemetry: telemetry,
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}
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}
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func (sm *Service) Init(ctx context.Context, group *async.Group, subscription events.Subscription) error {
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imapServer, err := sm.createIMAPServer(ctx)
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if err != nil {
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return err
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}
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smtpServer := sm.createSMTPServer()
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sm.imapServer = imapServer
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sm.smtpServer = smtpServer
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group.Once(func(ctx context.Context) {
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logging.DoAnnotated(ctx, func(ctx context.Context) {
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sm.run(ctx, subscription)
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}, logging.Labels{
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"service": "server-manager",
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})
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})
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return nil
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}
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func (sm *Service) CloseServers(ctx context.Context) error {
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defer sm.requests.Close()
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_, err := sm.requests.Send(ctx, &smRequestClose{})
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return err
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}
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func (sm *Service) RestartIMAP(ctx context.Context) error {
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_, err := sm.requests.Send(ctx, &smRequestRestartIMAP{})
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return err
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}
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func (sm *Service) RestartSMTP(ctx context.Context) error {
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_, err := sm.requests.Send(ctx, &smRequestRestartSMTP{})
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return err
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}
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func (sm *Service) AddIMAPUser(
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ctx context.Context,
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connector connector.Connector,
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addrID string,
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idProvider imapservice.GluonIDProvider,
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syncStateProvider syncservice.StateProvider,
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) error {
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_, err := sm.requests.Send(ctx, &smRequestAddIMAPUser{
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connector: connector,
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addrID: addrID,
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idProvider: idProvider,
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syncStateProvider: syncStateProvider,
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})
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return err
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}
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func (sm *Service) SetGluonDir(ctx context.Context, gluonDir string) error {
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_, err := sm.requests.Send(ctx, &smRequestSetGluonDir{
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dir: gluonDir,
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})
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return err
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}
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func (sm *Service) RemoveIMAPUser(ctx context.Context, deleteData bool, provider imapservice.GluonIDProvider, addrID ...string) error {
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_, err := sm.requests.Send(ctx, &smRequestRemoveIMAPUser{
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withData: deleteData,
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addrID: addrID,
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idProvider: provider,
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})
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return err
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}
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func (sm *Service) AddSMTPAccount(ctx context.Context, service *bridgesmtp.Service) error {
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_, err := sm.requests.Send(ctx, &smRequestAddSMTPAccount{account: service})
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return err
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}
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func (sm *Service) RemoveSMTPAccount(ctx context.Context, service *bridgesmtp.Service) error {
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_, err := sm.requests.Send(ctx, &smRequestRemoveSMTPAccount{account: service})
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return err
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}
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func (sm *Service) run(ctx context.Context, subscription events.Subscription) {
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eventSub := subscription.Add()
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defer subscription.Remove(eventSub)
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for {
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select {
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case <-ctx.Done():
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sm.handleClose(ctx)
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return
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case evt := <-eventSub.GetChannel():
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switch evt.(type) {
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case events.ConnStatusDown:
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sm.log.Info("Server Manager, network down stopping listeners")
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if err := sm.closeSMTPServer(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to close SMTP server")
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}
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if err := sm.stopIMAPListener(ctx); err != nil {
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sm.log.WithError(err)
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}
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case events.ConnStatusUp:
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sm.log.Info("Server Manager, network up starting listeners")
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sm.handleLoadedUserCountChange(ctx)
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}
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case request, ok := <-sm.requests.ReceiveCh():
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if !ok {
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return
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}
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switch r := request.Value().(type) {
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case *smRequestClose:
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sm.handleClose(ctx)
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request.Reply(ctx, nil, nil)
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return
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case *smRequestRestartSMTP:
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err := sm.restartSMTP(ctx)
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request.Reply(ctx, nil, err)
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case *smRequestRestartIMAP:
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err := sm.restartIMAP(ctx)
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request.Reply(ctx, nil, err)
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case *smRequestAddIMAPUser:
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err := sm.handleAddIMAPUser(ctx, r.connector, r.addrID, r.idProvider, r.syncStateProvider)
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request.Reply(ctx, nil, err)
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if err == nil {
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sm.handleLoadedUserCountChange(ctx)
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}
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case *smRequestRemoveIMAPUser:
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err := sm.handleRemoveIMAPUser(ctx, r.withData, r.idProvider, r.addrID...)
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request.Reply(ctx, nil, err)
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if err == nil {
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sm.handleLoadedUserCountChange(ctx)
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}
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case *smRequestSetGluonDir:
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err := sm.handleSetGluonDir(ctx, r.dir)
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request.Reply(ctx, nil, err)
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case *smRequestAddSMTPAccount:
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sm.log.WithField("user", r.account.UserID()).Debug("Adding SMTP Account")
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sm.smtpAccounts.AddAccount(r.account)
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request.Reply(ctx, nil, nil)
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case *smRequestRemoveSMTPAccount:
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sm.log.WithField("user", r.account.UserID()).Debug("Removing SMTP Account")
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sm.smtpAccounts.RemoveAccount(r.account)
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request.Reply(ctx, nil, nil)
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}
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}
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}
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}
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func (sm *Service) handleLoadedUserCountChange(ctx context.Context) {
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sm.log.Infof("Validating Listener State %v", sm.loadedUserCount)
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if sm.shouldStartServers() {
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if sm.imapListener == nil {
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if err := sm.serveIMAP(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to start IMAP server")
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}
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}
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if sm.smtpListener == nil {
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if err := sm.restartSMTP(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to start SMTP server")
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}
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}
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} else {
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if sm.imapListener != nil {
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if err := sm.stopIMAPListener(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to stop IMAP server")
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}
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}
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if sm.smtpListener != nil {
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if err := sm.closeSMTPServer(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to stop SMTP server")
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}
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}
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}
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}
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func (sm *Service) handleClose(ctx context.Context) {
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// Close the IMAP server.
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if err := sm.closeIMAPServer(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to close IMAP server")
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}
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// Close the SMTP server.
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if err := sm.closeSMTPServer(ctx); err != nil {
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sm.log.WithError(err).Error("Failed to close SMTP server")
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}
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// Cancel and wait needs to be called here since the SMTP server does not have a way to exit
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// the task on context cancellation. Therefor we need to wait here after we issued a close request.
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sm.tasks.CancelAndWait()
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}
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func (sm *Service) handleAddIMAPUser(ctx context.Context,
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connector connector.Connector,
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addrID string,
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idProvider imapservice.GluonIDProvider,
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syncStateProvider syncservice.StateProvider,
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) error {
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// Due to the many different error exits, performer user count change at this stage rather we split the incrementing
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// of users from the logic.
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err := sm.handleAddIMAPUserImpl(ctx, connector, addrID, idProvider, syncStateProvider)
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if err == nil {
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sm.loadedUserCount++
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}
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return err
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}
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func (sm *Service) handleAddIMAPUserImpl(ctx context.Context,
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connector connector.Connector,
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addrID string,
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idProvider imapservice.GluonIDProvider,
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syncStateProvider syncservice.StateProvider,
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) error {
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if sm.imapServer == nil {
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return fmt.Errorf("no imap server instance running")
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}
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log := sm.log.WithFields(logrus.Fields{
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"addrID": addrID,
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})
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log.Info("Adding user to imap server")
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if gluonID, ok := idProvider.GetGluonID(addrID); ok {
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log.WithField("gluonID", gluonID).Info("Loading existing IMAP user")
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// Load the user, checking whether the DB was newly created.
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isNew, err := sm.imapServer.LoadUser(ctx, connector, gluonID, idProvider.GluonKey())
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if err != nil {
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return fmt.Errorf("failed to load IMAP user: %w", err)
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}
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if isNew {
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// If the DB was newly created, clear the sync status; gluon's DB was not found.
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sm.log.Warn("IMAP user DB was newly created, clearing sync status")
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// Remove the user from IMAP so we can clear the sync status.
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if err := sm.imapServer.RemoveUser(ctx, gluonID, false); err != nil {
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return fmt.Errorf("failed to remove IMAP user: %w", err)
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}
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// Clear the sync status -- we need to resync all messages.
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if err := syncStateProvider.ClearSyncStatus(ctx); err != nil {
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return fmt.Errorf("failed to clear sync status: %w", err)
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}
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// Add the user back to the IMAP server.
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if isNew, err := sm.imapServer.LoadUser(ctx, connector, gluonID, idProvider.GluonKey()); err != nil {
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return fmt.Errorf("failed to add IMAP user: %w", err)
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} else if isNew {
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panic("IMAP user should already have a database")
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}
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} else {
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status, err := syncStateProvider.GetSyncStatus(ctx)
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if err != nil {
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return fmt.Errorf("failed to get sync status: %w", err)
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}
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if !status.HasLabels {
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// Otherwise, the DB already exists -- if the labels are not yet synced, we need to re-create the DB.
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if err := sm.imapServer.RemoveUser(ctx, gluonID, true); err != nil {
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return fmt.Errorf("failed to remove old IMAP user: %w", err)
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}
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if err := idProvider.RemoveGluonID(addrID, gluonID); err != nil {
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return fmt.Errorf("failed to remove old IMAP user ID: %w", err)
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}
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gluonID, err := sm.imapServer.AddUser(ctx, connector, idProvider.GluonKey())
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if err != nil {
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return fmt.Errorf("failed to add IMAP user: %w", err)
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}
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if err := idProvider.SetGluonID(addrID, gluonID); err != nil {
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return fmt.Errorf("failed to set IMAP user ID: %w", err)
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}
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log.WithField("gluonID", gluonID).Info("Re-created IMAP user")
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}
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}
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} else {
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log.Info("Creating new IMAP user")
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// GODT-3003: Ensure previous IMAP sync state is cleared if we run into code path after vault corruption.
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if err := syncStateProvider.ClearSyncStatus(ctx); err != nil {
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return fmt.Errorf("failed to reset sync status: %w", err)
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}
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gluonID, err := sm.imapServer.AddUser(ctx, connector, idProvider.GluonKey())
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if err != nil {
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return fmt.Errorf("failed to add IMAP user: %w", err)
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}
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if err := idProvider.SetGluonID(addrID, gluonID); err != nil {
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return fmt.Errorf("failed to set IMAP user ID: %w", err)
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}
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log.WithField("gluonID", gluonID).Info("Created new IMAP user")
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}
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return nil
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}
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func (sm *Service) handleRemoveIMAPUser(ctx context.Context, withData bool, idProvider imapservice.GluonIDProvider, addrIDs ...string) error {
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if sm.imapServer == nil {
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return fmt.Errorf("no imap server instance running")
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}
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sm.log.WithFields(logrus.Fields{
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"withData": withData,
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"addresses": addrIDs,
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}).Debug("Removing IMAP user")
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for _, addrID := range addrIDs {
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gluonID, ok := idProvider.GetGluonID(addrID)
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if !ok {
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sm.log.Warnf("Could not find Gluon ID for addrID %v", addrID)
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continue
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}
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if err := sm.imapServer.RemoveUser(ctx, gluonID, withData); err != nil {
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return fmt.Errorf("failed to remove IMAP user: %w", err)
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}
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if withData {
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if err := idProvider.RemoveGluonID(addrID, gluonID); err != nil {
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return fmt.Errorf("failed to remove IMAP user ID: %w", err)
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}
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}
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sm.loadedUserCount--
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}
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return nil
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}
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func (sm *Service) createIMAPServer(ctx context.Context) (*gluon.Server, error) {
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gluonDataDir, err := sm.imapSettings.DataDirectory()
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if err != nil {
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return nil, fmt.Errorf("failed to get Gluon Database directory: %w", err)
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}
|
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server, err := newIMAPServer(
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sm.imapSettings.CacheDirectory(),
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gluonDataDir,
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sm.imapSettings.Version(),
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sm.imapSettings.TLSConfig(),
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sm.reporter,
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sm.imapSettings.LogClient(),
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sm.imapSettings.LogServer(),
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sm.imapSettings.EventPublisher(),
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sm.tasks,
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sm.uidValidityGenerator,
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sm.panicHandler,
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)
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if err == nil {
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sm.eventPublisher.PublishEvent(ctx, events.IMAPServerCreated{})
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}
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return server, err
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}
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|
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func (sm *Service) createSMTPServer() *smtp.Server {
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return newSMTPServer(sm.smtpAccounts, sm.smtpSettings)
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}
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func (sm *Service) closeSMTPServer(ctx context.Context) error {
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// We close the listener ourselves even though it's also closed by smtpServer.Close().
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// This is because smtpServer.Serve() is called in a separate goroutine and might be executed
|
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// after we've already closed the server. However, go-smtp has a bug; it blocks on the listener
|
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// even after the server has been closed. So we close the listener ourselves to unblock it.
|
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|
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if sm.smtpListener != nil {
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sm.log.Info("Closing SMTP Listener")
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if err := sm.smtpListener.Close(); err != nil {
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return fmt.Errorf("failed to close SMTP listener: %w", err)
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}
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|
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sm.smtpListener = nil
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}
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|
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if sm.smtpServer != nil {
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sm.log.Info("Closing SMTP server")
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if err := sm.smtpServer.Close(); err != nil {
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sm.log.WithError(err).Debug("Failed to close SMTP server (expected -- we close the listener ourselves)")
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}
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sm.smtpServer = nil
|
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|
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sm.eventPublisher.PublishEvent(ctx, events.SMTPServerStopped{})
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}
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return nil
|
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}
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|
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func (sm *Service) closeIMAPServer(ctx context.Context) error {
|
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if sm.imapListener != nil {
|
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sm.log.Info("Closing IMAP Listener")
|
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|
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if err := sm.imapListener.Close(); err != nil {
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return fmt.Errorf("failed to close IMAP listener: %w", err)
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}
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|
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sm.imapListener = nil
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|
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sm.eventPublisher.PublishEvent(ctx, events.IMAPServerStopped{})
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}
|
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|
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if sm.imapServer != nil {
|
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sm.log.Info("Closing IMAP server")
|
|
if err := sm.imapServer.Close(ctx); err != nil {
|
|
return fmt.Errorf("failed to close IMAP server: %w", err)
|
|
}
|
|
|
|
sm.imapServer = nil
|
|
|
|
sm.eventPublisher.PublishEvent(ctx, events.IMAPServerClosed{})
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) restartIMAP(ctx context.Context) error {
|
|
sm.log.Info("Restarting IMAP server")
|
|
|
|
if sm.imapListener != nil {
|
|
if err := sm.imapListener.Close(); err != nil {
|
|
return fmt.Errorf("failed to close IMAP listener: %w", err)
|
|
}
|
|
|
|
sm.imapListener = nil
|
|
|
|
sm.eventPublisher.PublishEvent(ctx, events.IMAPServerStopped{})
|
|
}
|
|
|
|
if sm.shouldStartServers() {
|
|
return sm.serveIMAP(ctx)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) restartSMTP(ctx context.Context) error {
|
|
sm.log.Info("Restarting SMTP server")
|
|
|
|
if err := sm.closeSMTPServer(ctx); err != nil {
|
|
return fmt.Errorf("failed to close SMTP: %w", err)
|
|
}
|
|
|
|
sm.eventPublisher.PublishEvent(ctx, events.SMTPServerStopped{})
|
|
|
|
sm.smtpServer = newSMTPServer(sm.smtpAccounts, sm.smtpSettings)
|
|
|
|
if sm.shouldStartServers() {
|
|
return sm.serveSMTP(ctx)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) serveSMTP(ctx context.Context) error {
|
|
port, err := func() (int, error) {
|
|
sm.log.WithFields(logrus.Fields{
|
|
"port": sm.smtpSettings.Port(),
|
|
"ssl": sm.smtpSettings.UseSSL(),
|
|
}).Info("Starting SMTP server")
|
|
|
|
smtpListener, err := newListener(sm.smtpSettings.Port(), sm.smtpSettings.UseSSL(), sm.smtpSettings.TLSConfig())
|
|
if err != nil {
|
|
return 0, fmt.Errorf("failed to create SMTP listener: %w", err)
|
|
}
|
|
|
|
sm.smtpListener = smtpListener
|
|
|
|
sm.tasks.Once(func(context.Context) {
|
|
if err := sm.smtpServer.Serve(smtpListener); err != nil {
|
|
sm.log.WithError(err).Info("SMTP server stopped")
|
|
}
|
|
})
|
|
|
|
if err := sm.smtpSettings.SetPort(getPort(smtpListener.Addr())); err != nil {
|
|
return 0, fmt.Errorf("failed to store SMTP port in vault: %w", err)
|
|
}
|
|
|
|
return getPort(smtpListener.Addr()), nil
|
|
}()
|
|
|
|
if err != nil {
|
|
sm.eventPublisher.PublishEvent(ctx, events.SMTPServerError{
|
|
Error: err,
|
|
})
|
|
|
|
return err
|
|
}
|
|
|
|
sm.eventPublisher.PublishEvent(ctx, events.SMTPServerReady{
|
|
Port: port,
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) serveIMAP(ctx context.Context) error {
|
|
port, err := func() (int, error) {
|
|
if sm.imapServer == nil {
|
|
return 0, fmt.Errorf("no IMAP server instance running")
|
|
}
|
|
|
|
sm.log.WithFields(logrus.Fields{
|
|
"port": sm.imapSettings.Port(),
|
|
"ssl": sm.imapSettings.UseSSL(),
|
|
}).Info("Starting IMAP server")
|
|
|
|
imapListener, err := newListener(sm.imapSettings.Port(), sm.imapSettings.UseSSL(), sm.imapSettings.TLSConfig())
|
|
if err != nil {
|
|
return 0, fmt.Errorf("failed to create IMAP listener: %w", err)
|
|
}
|
|
|
|
sm.imapListener = imapListener
|
|
|
|
if err := sm.imapServer.Serve(ctx, sm.imapListener); err != nil {
|
|
return 0, fmt.Errorf("failed to serve IMAP: %w", err)
|
|
}
|
|
|
|
if err := sm.imapSettings.SetPort(getPort(imapListener.Addr())); err != nil {
|
|
return 0, fmt.Errorf("failed to store IMAP port in vault: %w", err)
|
|
}
|
|
|
|
return getPort(imapListener.Addr()), nil
|
|
}()
|
|
|
|
if err != nil {
|
|
sm.eventPublisher.PublishEvent(ctx, events.IMAPServerError{
|
|
Error: err,
|
|
})
|
|
|
|
return err
|
|
}
|
|
|
|
sm.eventPublisher.PublishEvent(ctx, events.IMAPServerReady{
|
|
Port: port,
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) stopIMAPListener(ctx context.Context) error {
|
|
sm.log.Info("Stopping IMAP listener")
|
|
if sm.imapListener != nil {
|
|
if err := sm.imapListener.Close(); err != nil {
|
|
return err
|
|
}
|
|
|
|
sm.imapListener = nil
|
|
|
|
sm.eventPublisher.PublishEvent(ctx, events.IMAPServerStopped{})
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) handleSetGluonDir(ctx context.Context, newGluonDir string) error {
|
|
currentGluonDir := sm.imapSettings.CacheDirectory()
|
|
newGluonDir = filepath.Join(newGluonDir, "gluon")
|
|
if newGluonDir == currentGluonDir {
|
|
return fmt.Errorf("new gluon dir is the same as the old one")
|
|
}
|
|
|
|
if err := sm.closeIMAPServer(ctx); err != nil {
|
|
return fmt.Errorf("failed to close IMAP: %w", err)
|
|
}
|
|
|
|
sm.loadedUserCount = 0
|
|
|
|
if err := moveGluonCacheDir(sm.imapSettings, currentGluonDir, newGluonDir); err != nil {
|
|
sm.log.WithError(err).Error("failed to move GluonCacheDir")
|
|
|
|
if err := sm.imapSettings.SetCacheDirectory(currentGluonDir); err != nil {
|
|
return fmt.Errorf("failed to revert GluonCacheDir: %w", err)
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
sm.telemetry.SetCacheLocation(newGluonDir)
|
|
|
|
imapServer, err := sm.createIMAPServer(ctx)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create new IMAP server: %w", err)
|
|
}
|
|
|
|
sm.imapServer = imapServer
|
|
|
|
if sm.shouldStartServers() {
|
|
if err := sm.serveIMAP(ctx); err != nil {
|
|
return fmt.Errorf("failed to serve IMAP: %w", err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (sm *Service) shouldStartServers() bool {
|
|
return sm.loadedUserCount >= 1
|
|
}
|
|
|
|
type smRequestClose struct{}
|
|
|
|
type smRequestRestartIMAP struct{}
|
|
|
|
type smRequestRestartSMTP struct{}
|
|
|
|
type smRequestAddIMAPUser struct {
|
|
connector connector.Connector
|
|
addrID string
|
|
idProvider imapservice.GluonIDProvider
|
|
syncStateProvider syncservice.StateProvider
|
|
}
|
|
|
|
type smRequestRemoveIMAPUser struct {
|
|
withData bool
|
|
addrID []string
|
|
idProvider imapservice.GluonIDProvider
|
|
}
|
|
|
|
type smRequestSetGluonDir struct {
|
|
dir string
|
|
}
|
|
|
|
type smRequestAddSMTPAccount struct {
|
|
account *bridgesmtp.Service
|
|
}
|
|
|
|
type smRequestRemoveSMTPAccount struct {
|
|
account *bridgesmtp.Service
|
|
}
|