release: 0.6.0: Delivery detail page, DNS badge, machine metrics, wide layout

A page per delivery (`/deliveries/{id}`), reached from the *Details* link on
Added:
  - A page per delivery (`/deliveries/{id}`), reached from the *Details* link on
  - A **DNS** badge in the domain list, one per row, carrying the same
  - Machine metrics on the status page: a **Machine** card reporting the
  - An index of the current page's own sections in the navigation column, for the
Changed:
  - Every panel page is laid out in one column of the same width, so moving
  - The mark's small-size variant — the tab icon and the `SP` initials it
  - The stamp's `SELF-HOSTED SMTP RELAY` line is set at 11.5/0.15 instead of
  - The delivery log lists what identifies a message and nothing else: time,
  - Subjects are decoded for display as well as on the way in, so the rows the
  … (4 more in CHANGELOG)

Full detail: CHANGELOG.md (0.6.0).

internal/milter/milter.go

@@ -14,7 +14,6 @@ package milter
 import (
 	"context"
 	"log"
-	"mime"
 	"net"
 	"net/textproto"
 	"strings"
@@ -22,6 +21,7 @@ import (
 
 	"github.com/emersion/go-milter"
 
+	"github.com/mixeme/selfpost/internal/mailhdr"
 	"github.com/mixeme/selfpost/internal/store"
 )
 
@@ -101,35 +101,11 @@ func (s *session) RcptTo(rcpt string, m *milter.Modifier) (milter.Response, erro
 // Header captures the Subject. Only the first Subject header is kept.
 func (s *session) Header(name, value string, m *milter.Modifier) (milter.Response, error) {
 	if s.subject == "" && textproto.CanonicalMIMEHeaderKey(name) == "Subject" {
-		s.subject = decodeSubject(value)
+		s.subject = mailhdr.DecodeSubject(value)
 	}
 	return milter.RespContinue, nil
 }
 
-// subjectMaxRunes caps what the journal keeps of a subject. A Subject header
-// may legally run to hundreds of characters; the log only needs enough to
-// recognise the message, and the panel shows one row per recipient.
-const subjectMaxRunes = 200
-
-// decodeSubject turns the raw Subject header into display text. Anything
-// non-ASCII arrives as RFC 2047 encoded-words (=?utf-8?Q?=D0=9F…?=), which the
-// panel would otherwise show verbatim: unreadable, and — being one unbreakable
-// run — wide enough to push the send-log table out of its card. Go's decoder
-// covers the UTF-8 and ASCII charsets senders use in practice; for anything
-// else (windows-1251, koi8-r) it fails and the raw header is kept, which is no
-// worse than before. Truncation is applied after decoding so the cap counts
-// characters of the subject, not bytes of its encoding.
-func decodeSubject(v string) string {
-	if dec, err := (&mime.WordDecoder{}).DecodeHeader(v); err == nil {
-		v = dec
-	}
-	v = strings.TrimSpace(v)
-	if r := []rune(v); len(r) > subjectMaxRunes {
-		v = string(r[:subjectMaxRunes]) + "…"
-	}
-	return v
-}
-
 // Body fires at end-of-message, when the queue-id macro {i} is set and the
 // message is about to be committed to the queue. This is where the "queued"
 // rows are written. We accept (this milter is done) without ever rejecting.