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5b20cba50a
we don't want external software to include internal details like mlog. slog.Logger is/will be the standard. we still have mlog for its helper functions, and its handler that logs in concise logfmt used by mox. packages that are not meant for reuse still pass around mlog.Log for convenience. we use golang.org/x/exp/slog because we also support the previous Go toolchain version. with the next Go release, we'll switch to the builtin slog.
74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package smtpserver
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"fmt"
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"io"
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"os"
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"golang.org/x/exp/slog"
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"github.com/mjl-/bstore"
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"github.com/mjl-/mox/message"
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"github.com/mjl-/mox/mlog"
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"github.com/mjl-/mox/moxio"
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"github.com/mjl-/mox/store"
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)
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// rejectPresent returns whether the message is already present in the rejects mailbox.
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func rejectPresent(log mlog.Log, acc *store.Account, rejectsMailbox string, m *store.Message, f *os.File) (present bool, msgID string, hash []byte, rerr error) {
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if p, err := message.Parse(log.Logger, false, store.FileMsgReader(m.MsgPrefix, f)); err != nil {
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log.Infox("parsing reject message for message-id", err)
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} else if header, err := p.Header(); err != nil {
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log.Infox("parsing reject message header for message-id", err)
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} else {
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msgID, _, err = message.MessageIDCanonical(header.Get("Message-Id"))
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if err != nil {
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log.Debugx("parsing message-id for reject", err, slog.String("messageid", header.Get("Message-Id")))
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}
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}
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// We must not read MsgPrefix, it will likely change for subsequent deliveries.
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h := sha256.New()
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if _, err := io.Copy(h, &moxio.AtReader{R: f}); err != nil {
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log.Infox("copying reject message to hash", err)
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} else {
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hash = h.Sum(nil)
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}
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if msgID == "" && len(hash) == 0 {
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return false, "", nil, fmt.Errorf("no message-id or hash for determining reject message presence")
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}
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var exists bool
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var err error
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acc.WithRLock(func() {
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err = acc.DB.Read(context.TODO(), func(tx *bstore.Tx) error {
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mbq := bstore.QueryTx[store.Mailbox](tx)
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mbq.FilterNonzero(store.Mailbox{Name: rejectsMailbox})
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mb, err := mbq.Get()
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if err == bstore.ErrAbsent {
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return nil
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}
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if err != nil {
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return fmt.Errorf("looking for rejects mailbox: %w", err)
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}
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q := bstore.QueryTx[store.Message](tx)
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q.FilterNonzero(store.Message{MailboxID: mb.ID})
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q.FilterEqual("Expunged", false)
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q.FilterFn(func(m store.Message) bool {
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return msgID != "" && m.MessageID == msgID || len(hash) > 0 && bytes.Equal(m.MessageHash, hash)
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})
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exists, err = q.Exists()
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return err
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})
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})
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if err != nil {
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return false, "", nil, fmt.Errorf("querying for presence of reject message: %w", err)
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}
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return exists, msgID, hash, nil
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}
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