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add rfc 4155 about mbox files, and cross-reference in the import/export code for mbox files

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This commit is contained in:
Mechiel Lukkien
2025-03-23 13:59:09 +01:00
parent a68a9d8a48
commit 88ec5c6fbe
3 changed files with 10 additions and 2 deletions
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6
store/export.go
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@ -400,6 +400,7 @@ func exportMailbox(log mlog.Log, tx *bstore.Tx, accountDir string, mailboxID int
if m.MailFrom != "" {
mailfrom = m.MailFrom
}
// ../rfc/4155:80
if _, err := fmt.Fprintf(mboxwriter, "From %s %s\n", mailfrom, m.Received.Format(time.ANSIC)); err != nil {
return fmt.Errorf("write message line to mbox temp file: %v", err)
}
@ -450,6 +451,8 @@ func exportMailbox(log mlog.Log, tx *bstore.Tx, accountDir string, mailboxID int
}
}
// ../rfc/4155:365 todo: rewrite messages to be 7-bit. still useful nowadays?
header := true
r := bufio.NewReader(mr)
for {
@ -458,6 +461,7 @@ func exportMailbox(log mlog.Log, tx *bstore.Tx, accountDir string, mailboxID int
return fmt.Errorf("reading message: %v", rerr)
}
if len(line) > 0 {
// ../rfc/4155:354
if bytes.HasSuffix(line, []byte("\r\n")) {
line = line[:len(line)-1]
line[len(line)-1] = '\n'
@ -473,6 +477,7 @@ func exportMailbox(log mlog.Log, tx *bstore.Tx, accountDir string, mailboxID int
continue
}
}
// ../rfc/4155:119
if bytes.HasPrefix(bytes.TrimLeft(line, ">"), []byte("From ")) {
if _, err := fmt.Fprint(mboxwriter, ">"); err != nil {
return fmt.Errorf("writing escaping >: %v", err)
@ -486,6 +491,7 @@ func exportMailbox(log mlog.Log, tx *bstore.Tx, accountDir string, mailboxID int
break
}
}
// ../rfc/4155:75
if _, err := fmt.Fprint(mboxwriter, "\n"); err != nil {
return fmt.Errorf("writing end of message newline: %v", err)
}