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when logging email addresses with IDNA domain and/or special characters or utf8 in localpart, log both native utf8 form and form with escape localpart and ascii-only domain

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the idea is to make it clear from the logging if non-ascii characters are used.

this is implemented by making mlog recognize if a field value that will be
logged has a LogString method. if so, that value is logged. dns.Domain,
smtp.Address, smtp.Localpart, smtp.Path now have a LogString method.

some explicit calls to String have been replaced to LogString, and some %q
formatting have been replaced with %s, because the escaped localpart would
already have double quotes, and double doublequotes aren't easy to read.
This commit is contained in:
Mechiel Lukkien
2023-03-09 20:18:34 +01:00
parent eb26e9b921
commit 5742ed1537
12 changed files with 93 additions and 18 deletions
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2
ctl.go
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@ -397,7 +397,7 @@ func servectlcmd(ctx context.Context, log *mlog.Log, ctl *ctl, xcmd *string, shu
if qm.LastAttempt != nil {
lastAttempt = time.Since(*qm.LastAttempt).Round(time.Second).String()
}
fmt.Fprintf(xw, "%5d %s from:%s@%s to:%s@%s next %s last %s error %q\n", qm.ID, qm.Queued.Format(time.RFC3339), qm.SenderLocalpart, qm.SenderDomain, qm.RecipientLocalpart, qm.RecipientDomain, -time.Since(qm.NextAttempt).Round(time.Second), lastAttempt, qm.LastError)
fmt.Fprintf(xw, "%5d %s from:%s to:%s next %s last %s error %q\n", qm.ID, qm.Queued.Format(time.RFC3339), qm.Sender().LogString(), qm.Recipient().LogString(), -time.Since(qm.NextAttempt).Round(time.Second), lastAttempt, qm.LastError)
}
if len(qmsgs) == 0 {
fmt.Fprint(xw, "(empty)\n")