diff options
| -rw-r--r-- | lib/format/format.go | 20 | ||||
| -rw-r--r-- | worker/lib/parse.go | 73 |
2 files changed, 67 insertions, 26 deletions
diff --git a/lib/format/format.go b/lib/format/format.go index 5f45e58..cc46da8 100644 --- a/lib/format/format.go +++ b/lib/format/format.go @@ -5,6 +5,7 @@ import ( "fmt" gomail "net/mail" "strings" + "time" "unicode" "git.sr.ht/~sircmpwn/aerc/models" @@ -111,13 +112,21 @@ func ParseMessageFormat( retval = append(retval, 'd') args = append(args, number) case 'd': + date := msg.Envelope.Date + if date.IsZero() { + date = msg.InternalDate + } retval = append(retval, 's') args = append(args, - msg.InternalDate.Format(timestampformat)) + dummyIfZeroDate(date, timestampformat)) case 'D': + date := msg.Envelope.Date + if date.IsZero() { + date = msg.InternalDate + } retval = append(retval, 's') args = append(args, - msg.InternalDate.Local().Format(timestampformat)) + dummyIfZeroDate(date, timestampformat)) case 'f': if msg.Envelope == nil { return "", nil, @@ -335,3 +344,10 @@ handle_end_error: return "", nil, errors.New("reached end of string while parsing message format") } + +func dummyIfZeroDate(date time.Time, format string) string { + if date.IsZero() { + return strings.Repeat("?", len(format)) + } + return date.Format(format) +} diff --git a/worker/lib/parse.go b/worker/lib/parse.go index a14a6d3..58327c9 100644 --- a/worker/lib/parse.go +++ b/worker/lib/parse.go @@ -102,11 +102,9 @@ func ParseEntityStructure(e *message.Entity) (*models.BodyStructure, error) { return &body, nil } +var DateParseError = errors.New("date parsing failed") + func parseEnvelope(h *mail.Header) (*models.Envelope, error) { - date, err := parseDate(h) - if err != nil { - return nil, fmt.Errorf("could not parse date header: %v", err) - } from, err := parseAddressList(h, "from") if err != nil { return nil, fmt.Errorf("could not read from address: %v", err) @@ -135,6 +133,12 @@ func parseEnvelope(h *mail.Header) (*models.Envelope, error) { if err != nil { return nil, fmt.Errorf("could not read message id: %v", err) } + date, err := parseDate(h) + if err != nil { + // still return a valid struct plus a sentinel date parsing error + // if only the date parsing failed + err = fmt.Errorf("%w: %v", DateParseError, err) + } return &models.Envelope{ Date: date, Subject: subj, @@ -144,28 +148,24 @@ func parseEnvelope(h *mail.Header) (*models.Envelope, error) { To: to, Cc: cc, Bcc: bcc, - }, nil + }, err } -// parseDate extends the built-in date parser with additional layouts which are -// non-conforming but appear in the wild. +// parseDate tries to parse the date from the Date header with non std formats +// if this fails it tries to parse the received header as well func parseDate(h *mail.Header) (time.Time, error) { - t, parseErr := h.Date() - if parseErr == nil { + t, err := h.Date() + if err == nil { return t, nil } text, err := h.Text("date") - if err != nil { - return time.Time{}, errors.New("no date header") - } - // sometimes, no error occurs but the date is empty. In this case, guess time from received header field - if text == "" { - guess, err := h.Text("received") - if err != nil { - return time.Time{}, errors.New("no received header") + // sometimes, no error occurs but the date is empty. + // In this case, guess time from received header field + if err != nil || text == "" { + t, err := parseReceivedHeader(h) + if err == nil { + return t, nil } - t, _ := time.Parse(time.RFC1123Z, dateRe.FindString(guess)) - return t, nil } layouts := []string{ // X-Mailer: EarthLink Zoo Mail 1.0 @@ -176,7 +176,21 @@ func parseDate(h *mail.Header) (time.Time, error) { return t, nil } } - return time.Time{}, fmt.Errorf("unrecognized date format: %s", text) + // still no success, try the received header as a last resort + t, err = parseReceivedHeader(h) + if err != nil { + return time.Time{}, fmt.Errorf("unrecognized date format: %s", text) + } + return t, nil +} + +func parseReceivedHeader(h *mail.Header) (time.Time, error) { + guess, err := h.Text("received") + if err != nil { + return time.Time{}, fmt.Errorf("received header not parseable: %v", + err) + } + return time.Parse(time.RFC1123Z, dateRe.FindString(guess)) } func parseAddressList(h *mail.Header, key string) ([]*models.Address, error) { @@ -231,9 +245,20 @@ func MessageInfo(raw RawMessage) (*models.MessageInfo, error) { if err != nil { return nil, fmt.Errorf("could not get structure: %v", err) } - env, err := parseEnvelope(&mail.Header{msg.Header}) - if err != nil { - return nil, fmt.Errorf("could not get envelope: %v", err) + h := &mail.Header{msg.Header} + env, err := parseEnvelope(h) + if err != nil && !errors.Is(err, DateParseError) { + return nil, fmt.Errorf("could not parse envelope: %v", err) + // if only the date parsing failed we still get the rest of the + // envelop structure in a valid state. + // Date parsing errors are fairly common and it's better to be + // slightly off than to not be able to read the mails at all + // hence we continue here + } + recDate, _ := parseReceivedHeader(h) + if recDate.IsZero() { + // better than nothing, if incorrect + recDate = env.Date } flags, err := raw.ModelFlags() if err != nil { @@ -248,7 +273,7 @@ func MessageInfo(raw RawMessage) (*models.MessageInfo, error) { Envelope: env, Flags: flags, Labels: labels, - InternalDate: env.Date, + InternalDate: recDate, RFC822Headers: &mail.Header{msg.Header}, Size: 0, Uid: raw.UID(), |