mirror of
https://github.com/mjl-/mox.git
synced 2024-12-26 16:33:47 +03:00
953 lines
19 KiB
Go
953 lines
19 KiB
Go
package imapserver
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net/textproto"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/mjl-/mox/mlog"
|
|
)
|
|
|
|
var (
|
|
listWildcards = "%*"
|
|
char = charRange('\x01', '\x7f')
|
|
ctl = charRange('\x01', '\x19')
|
|
atomChar = charRemove(char, "(){ "+listWildcards+ctl)
|
|
respSpecials = atomChar + "]"
|
|
astringChar = atomChar + respSpecials
|
|
)
|
|
|
|
func charRange(first, last rune) string {
|
|
r := ""
|
|
c := first
|
|
r += string(c)
|
|
for c < last {
|
|
c++
|
|
r += string(c)
|
|
}
|
|
return r
|
|
}
|
|
|
|
func charRemove(s, remove string) string {
|
|
r := ""
|
|
next:
|
|
for _, c := range s {
|
|
for _, x := range remove {
|
|
if c == x {
|
|
continue next
|
|
}
|
|
}
|
|
r += string(c)
|
|
}
|
|
return r
|
|
}
|
|
|
|
type parser struct {
|
|
// Orig is the line in original casing, and upper in upper casing. We often match
|
|
// against upper for easy case insensitive handling as IMAP requires, but sometimes
|
|
// return from orig to keep the original case.
|
|
orig string
|
|
upper string
|
|
o int // Current offset in parsing.
|
|
contexts []string // What we're parsing, for error messages.
|
|
conn *conn
|
|
}
|
|
|
|
// toUpper upper cases bytes that are a-z. strings.ToUpper does too much. and
|
|
// would replace invalid bytes with unicode replacement characters, which would
|
|
// break our requirement that offsets into the original and upper case strings
|
|
// point to the same character.
|
|
func toUpper(s string) string {
|
|
r := []byte(s)
|
|
for i, c := range r {
|
|
if c >= 'a' && c <= 'z' {
|
|
r[i] = c - 0x20
|
|
}
|
|
}
|
|
return string(r)
|
|
}
|
|
|
|
func newParser(s string, conn *conn) *parser {
|
|
return &parser{s, toUpper(s), 0, nil, conn}
|
|
}
|
|
|
|
func (p *parser) xerrorf(format string, args ...any) {
|
|
var err error
|
|
errmsg := fmt.Sprintf(format, args...)
|
|
remaining := fmt.Sprintf("remaining %q", p.orig[p.o:])
|
|
if len(p.contexts) > 0 {
|
|
remaining += ", context " + strings.Join(p.contexts, ",")
|
|
}
|
|
remaining = " (" + remaining + ")"
|
|
if p.conn.account != nil {
|
|
errmsg += remaining
|
|
err = errors.New(errmsg)
|
|
} else {
|
|
err = errors.New(errmsg + remaining)
|
|
}
|
|
panic(syntaxError{"", "", errmsg, err})
|
|
}
|
|
|
|
func (p *parser) context(s string) func() {
|
|
p.contexts = append(p.contexts, s)
|
|
return func() {
|
|
p.contexts = p.contexts[:len(p.contexts)-1]
|
|
}
|
|
}
|
|
|
|
func (p *parser) empty() bool {
|
|
return p.o == len(p.upper)
|
|
}
|
|
|
|
func (p *parser) xempty() {
|
|
if !p.empty() {
|
|
p.xerrorf("leftover data")
|
|
}
|
|
}
|
|
|
|
func (p *parser) hasPrefix(s string) bool {
|
|
return strings.HasPrefix(p.upper[p.o:], s)
|
|
}
|
|
|
|
func (p *parser) take(s string) bool {
|
|
if !p.hasPrefix(s) {
|
|
return false
|
|
}
|
|
p.o += len(s)
|
|
return true
|
|
}
|
|
|
|
func (p *parser) xtake(s string) {
|
|
if !p.take(s) {
|
|
p.xerrorf("expected %q", s)
|
|
}
|
|
}
|
|
|
|
func (p *parser) xnonempty() {
|
|
if p.empty() {
|
|
p.xerrorf("unexpected end")
|
|
}
|
|
}
|
|
|
|
func (p *parser) xtakeall() string {
|
|
r := p.orig[p.o:]
|
|
p.o = len(p.orig)
|
|
return r
|
|
}
|
|
|
|
func (p *parser) xtake1n(n int, what string) string {
|
|
if n == 0 {
|
|
p.xerrorf("expected chars from %s", what)
|
|
}
|
|
return p.xtaken(n)
|
|
}
|
|
|
|
func (p *parser) xtake1fn(fn func(i int, c rune) bool) string {
|
|
i := 0
|
|
s := ""
|
|
for _, c := range p.upper[p.o:] {
|
|
if !fn(i, c) {
|
|
break
|
|
}
|
|
s += string(c)
|
|
i++
|
|
}
|
|
if s == "" {
|
|
p.xerrorf("expected at least one character")
|
|
}
|
|
p.o += len(s)
|
|
return s
|
|
}
|
|
|
|
func (p *parser) xtakechars(s string, what string) string {
|
|
p.xnonempty()
|
|
for i, c := range p.orig[p.o:] {
|
|
if !contains(s, c) {
|
|
return p.xtake1n(i, what)
|
|
}
|
|
}
|
|
return p.xtakeall()
|
|
}
|
|
|
|
func (p *parser) xtaken(n int) string {
|
|
if p.o+n > len(p.orig) {
|
|
p.xerrorf("not enough data")
|
|
}
|
|
r := p.orig[p.o : p.o+n]
|
|
p.o += n
|
|
return r
|
|
}
|
|
|
|
func (p *parser) peekn(n int) (string, bool) {
|
|
if len(p.upper[p.o:]) < n {
|
|
return "", false
|
|
}
|
|
return p.upper[p.o : p.o+n], true
|
|
}
|
|
|
|
func (p *parser) space() bool {
|
|
return p.take(" ")
|
|
}
|
|
|
|
func (p *parser) xspace() {
|
|
if !p.space() {
|
|
p.xerrorf("expected space")
|
|
}
|
|
}
|
|
|
|
func (p *parser) digits() string {
|
|
var n int
|
|
for _, c := range p.upper[p.o:] {
|
|
if c >= '0' && c <= '9' {
|
|
n++
|
|
}
|
|
}
|
|
if n == 0 {
|
|
return ""
|
|
}
|
|
s := p.upper[p.o : p.o+n]
|
|
p.o += n
|
|
return s
|
|
}
|
|
|
|
func (p *parser) nznumber() (uint32, bool) {
|
|
o := p.o
|
|
for o < len(p.upper) && p.upper[o] >= '0' && p.upper[o] <= '9' {
|
|
o++
|
|
}
|
|
if o == p.o {
|
|
return 0, false
|
|
}
|
|
if n, err := strconv.ParseUint(p.upper[p.o:o], 10, 32); err != nil {
|
|
return 0, false
|
|
} else if n == 0 {
|
|
return 0, false
|
|
} else {
|
|
p.o = o
|
|
return uint32(n), true
|
|
}
|
|
}
|
|
|
|
func (p *parser) xnznumber() uint32 {
|
|
n, ok := p.nznumber()
|
|
if !ok {
|
|
p.xerrorf("expected non-zero number")
|
|
}
|
|
return n
|
|
}
|
|
|
|
func (p *parser) number() (uint32, bool) {
|
|
o := p.o
|
|
for o < len(p.upper) && p.upper[o] >= '0' && p.upper[o] <= '9' {
|
|
o++
|
|
}
|
|
if o == p.o {
|
|
return 0, false
|
|
}
|
|
n, err := strconv.ParseUint(p.upper[p.o:o], 10, 32)
|
|
if err != nil {
|
|
return 0, false
|
|
}
|
|
p.o = o
|
|
return uint32(n), true
|
|
}
|
|
|
|
func (p *parser) xnumber() uint32 {
|
|
n, ok := p.number()
|
|
if !ok {
|
|
p.xerrorf("expected number")
|
|
}
|
|
return n
|
|
}
|
|
|
|
func (p *parser) xnumber64() int64 {
|
|
s := p.digits()
|
|
if s == "" {
|
|
p.xerrorf("expected number64")
|
|
}
|
|
v, err := strconv.ParseInt(s, 10, 64)
|
|
if err != nil {
|
|
p.xerrorf("parsing number64 %q: %v", s, err)
|
|
}
|
|
return v
|
|
}
|
|
|
|
// l should be a list of uppercase words, the first match is returned
|
|
func (p *parser) takelist(l ...string) (string, bool) {
|
|
for _, w := range l {
|
|
if p.take(w) {
|
|
return w, true
|
|
}
|
|
}
|
|
return "", false
|
|
}
|
|
|
|
func (p *parser) xtakelist(l ...string) string {
|
|
w, ok := p.takelist(l...)
|
|
if !ok {
|
|
p.xerrorf("expected one of %s", strings.Join(l, ","))
|
|
}
|
|
return w
|
|
}
|
|
|
|
func (p *parser) xstring() (r string) {
|
|
if p.take(`"`) {
|
|
esc := false
|
|
r := ""
|
|
for i, c := range p.orig[p.o:] {
|
|
if c == '\\' {
|
|
esc = true
|
|
} else if c == '\x00' || c == '\r' || c == '\n' {
|
|
p.xerrorf("invalid nul, cr or lf in string")
|
|
} else if esc {
|
|
if c == '\\' || c == '"' {
|
|
r += string(c)
|
|
esc = false
|
|
} else {
|
|
p.xerrorf("invalid escape char %c", c)
|
|
}
|
|
} else if c == '"' {
|
|
p.o += i + 1
|
|
return r
|
|
} else {
|
|
r += string(c)
|
|
}
|
|
}
|
|
p.xerrorf("missing closing dquote in string")
|
|
}
|
|
size, sync := p.xliteralSize(100*1024, false)
|
|
s := p.conn.xreadliteral(size, sync)
|
|
line := p.conn.readline(false)
|
|
p.orig, p.upper, p.o = line, toUpper(line), 0
|
|
return s
|
|
}
|
|
|
|
func (p *parser) xnil() {
|
|
p.xtake("NIL")
|
|
}
|
|
|
|
// Returns NIL as empty string.
|
|
func (p *parser) xnilString() string {
|
|
if p.take("NIL") {
|
|
return ""
|
|
}
|
|
return p.xstring()
|
|
}
|
|
|
|
func (p *parser) xastring() string {
|
|
if p.hasPrefix(`"`) || p.hasPrefix("{") || p.hasPrefix("~{") {
|
|
return p.xstring()
|
|
}
|
|
return p.xtakechars(astringChar, "astring")
|
|
}
|
|
|
|
func contains(s string, c rune) bool {
|
|
for _, x := range s {
|
|
if x == c {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (p *parser) xtag() string {
|
|
p.xnonempty()
|
|
for i, c := range p.orig[p.o:] {
|
|
if c == '+' || !contains(astringChar, c) {
|
|
return p.xtake1n(i, "tag")
|
|
}
|
|
}
|
|
return p.xtakeall()
|
|
}
|
|
|
|
func (p *parser) xcommand() string {
|
|
for i, c := range p.upper[p.o:] {
|
|
if !(c >= 'A' && c <= 'Z' || c == ' ' && p.upper[p.o:p.o+i] == "UID") {
|
|
return p.xtake1n(i, "command")
|
|
}
|
|
}
|
|
return p.xtakeall()
|
|
}
|
|
|
|
func (p *parser) remainder() string {
|
|
return p.orig[p.o:]
|
|
}
|
|
|
|
func (p *parser) xflag() string {
|
|
return p.xtakelist(`\`, "$") + p.xatom()
|
|
}
|
|
|
|
func (p *parser) xflagList() (l []string) {
|
|
p.xtake("(")
|
|
if !p.hasPrefix(")") {
|
|
l = append(l, p.xflag())
|
|
}
|
|
for !p.take(")") {
|
|
p.xspace()
|
|
l = append(l, p.xflag())
|
|
}
|
|
return
|
|
}
|
|
|
|
func (p *parser) xatom() string {
|
|
return p.xtakechars(atomChar, "atom")
|
|
}
|
|
|
|
func (p *parser) xmailbox() string {
|
|
s := p.xastring()
|
|
// UTF-7 is deprecated in IMAP4rev2. IMAP4rev1 does not fully forbid
|
|
// UTF-8 returned in mailbox names. We'll do our best by attempting to
|
|
// decode utf-7. But if that doesn't work, we'll just use the original
|
|
// string.
|
|
// ../rfc/3501:964
|
|
if !p.conn.enabled[capIMAP4rev2] {
|
|
ns, err := utf7decode(s)
|
|
if err != nil {
|
|
p.conn.log.Infox("decoding utf7 or mailbox name", err, mlog.Field("name", s))
|
|
} else {
|
|
s = ns
|
|
}
|
|
}
|
|
return s
|
|
}
|
|
|
|
// ../rfc/9051:6605
|
|
func (p *parser) xlistMailbox() string {
|
|
if p.hasPrefix(`"`) || p.hasPrefix("{") {
|
|
return p.xstring()
|
|
}
|
|
return p.xtakechars(atomChar+listWildcards+respSpecials, "list-char")
|
|
}
|
|
|
|
// ../rfc/9051:6707 ../rfc/9051:6848 ../rfc/5258:1095 ../rfc/5258:1169 ../rfc/5258:1196
|
|
func (p *parser) xmboxOrPat() ([]string, bool) {
|
|
if !p.take("(") {
|
|
return []string{p.xlistMailbox()}, false
|
|
}
|
|
l := []string{p.xlistMailbox()}
|
|
for !p.take(")") {
|
|
p.xspace()
|
|
l = append(l, p.xlistMailbox())
|
|
}
|
|
return l, true
|
|
}
|
|
|
|
// ../rfc/9051:7056
|
|
// RECENT only in ../rfc/3501:5047
|
|
// APPENDLIMIT is from ../rfc/7889:252
|
|
func (p *parser) xstatusAtt() string {
|
|
return p.xtakelist("MESSAGES", "UIDNEXT", "UIDVALIDITY", "UNSEEN", "DELETED", "SIZE", "RECENT", "APPENDLIMIT")
|
|
}
|
|
|
|
// ../rfc/9051:7133 ../rfc/9051:7034
|
|
func (p *parser) xnumSet() (r numSet) {
|
|
defer p.context("numSet")()
|
|
if p.take("$") {
|
|
return numSet{searchResult: true}
|
|
}
|
|
r.ranges = append(r.ranges, p.xnumRange())
|
|
for p.take(",") {
|
|
r.ranges = append(r.ranges, p.xnumRange())
|
|
}
|
|
return r
|
|
}
|
|
|
|
// parse numRange, which can be just a setNumber.
|
|
func (p *parser) xnumRange() (r numRange) {
|
|
if p.take("*") {
|
|
r.first.star = true
|
|
} else {
|
|
r.first.number = p.xnznumber()
|
|
}
|
|
if p.take(":") {
|
|
r.last = &setNumber{}
|
|
if p.take("*") {
|
|
r.last.star = true
|
|
} else {
|
|
r.last.number = p.xnznumber()
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// ../rfc/9051:6989 ../rfc/3501:4977
|
|
func (p *parser) xsectionMsgtext() (r *sectionMsgtext) {
|
|
defer p.context("sectionMsgtext")()
|
|
msgtextWords := []string{"HEADER.FIELDS.NOT", "HEADER.FIELDS", "HEADER", "TEXT"}
|
|
w := p.xtakelist(msgtextWords...)
|
|
r = §ionMsgtext{s: w}
|
|
if strings.HasPrefix(w, "HEADER.FIELDS") {
|
|
p.xspace()
|
|
p.xtake("(")
|
|
r.headers = append(r.headers, textproto.CanonicalMIMEHeaderKey(p.xastring()))
|
|
for {
|
|
if p.take(")") {
|
|
break
|
|
}
|
|
p.xspace()
|
|
r.headers = append(r.headers, textproto.CanonicalMIMEHeaderKey(p.xastring()))
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// ../rfc/9051:6999 ../rfc/3501:4991
|
|
func (p *parser) xsectionSpec() (r *sectionSpec) {
|
|
defer p.context("parseSectionSpec")()
|
|
|
|
n, ok := p.nznumber()
|
|
if !ok {
|
|
return §ionSpec{msgtext: p.xsectionMsgtext()}
|
|
}
|
|
defer p.context("part...")()
|
|
pt := §ionPart{}
|
|
pt.part = append(pt.part, n)
|
|
for {
|
|
if !p.take(".") {
|
|
break
|
|
}
|
|
if n, ok := p.nznumber(); ok {
|
|
pt.part = append(pt.part, n)
|
|
continue
|
|
}
|
|
if p.take("MIME") {
|
|
pt.text = §ionText{mime: true}
|
|
break
|
|
}
|
|
pt.text = §ionText{msgtext: p.xsectionMsgtext()}
|
|
break
|
|
}
|
|
return §ionSpec{part: pt}
|
|
}
|
|
|
|
// ../rfc/9051:6985 ../rfc/3501:4975
|
|
func (p *parser) xsection() *sectionSpec {
|
|
defer p.context("parseSection")()
|
|
p.xtake("[")
|
|
if p.take("]") {
|
|
return §ionSpec{}
|
|
}
|
|
r := p.xsectionSpec()
|
|
p.xtake("]")
|
|
return r
|
|
}
|
|
|
|
// ../rfc/9051:6841
|
|
func (p *parser) xpartial() *partial {
|
|
p.xtake("<")
|
|
offset := p.xnumber()
|
|
p.xtake(".")
|
|
count := p.xnznumber()
|
|
p.xtake(">")
|
|
return &partial{offset, count}
|
|
}
|
|
|
|
// ../rfc/9051:6987
|
|
func (p *parser) xsectionBinary() (r []uint32) {
|
|
p.xtake("[")
|
|
if p.take("]") {
|
|
return nil
|
|
}
|
|
r = append(r, p.xnznumber())
|
|
for {
|
|
if !p.take(".") {
|
|
break
|
|
}
|
|
r = append(r, p.xnznumber())
|
|
}
|
|
p.xtake("]")
|
|
return r
|
|
}
|
|
|
|
// ../rfc/9051:6557 ../rfc/3501:4751
|
|
func (p *parser) xfetchAtt() (r fetchAtt) {
|
|
defer p.context("fetchAtt")()
|
|
words := []string{
|
|
"ENVELOPE", "FLAGS", "INTERNALDATE", "RFC822.SIZE", "BODYSTRUCTURE", "UID", "BODY.PEEK", "BODY", "BINARY.PEEK", "BINARY.SIZE", "BINARY",
|
|
"RFC822.HEADER", "RFC822.TEXT", "RFC822", // older IMAP
|
|
}
|
|
f := p.xtakelist(words...)
|
|
r.peek = strings.HasSuffix(f, ".PEEK")
|
|
r.field = strings.TrimSuffix(f, ".PEEK")
|
|
|
|
switch r.field {
|
|
case "BODY":
|
|
if p.hasPrefix("[") {
|
|
r.section = p.xsection()
|
|
if p.hasPrefix("<") {
|
|
r.partial = p.xpartial()
|
|
}
|
|
}
|
|
case "BINARY":
|
|
r.sectionBinary = p.xsectionBinary()
|
|
if p.hasPrefix("<") {
|
|
r.partial = p.xpartial()
|
|
}
|
|
case "BINARY.SIZE":
|
|
r.sectionBinary = p.xsectionBinary()
|
|
}
|
|
return
|
|
}
|
|
|
|
// ../rfc/9051:6553 ../rfc/3501:4748
|
|
func (p *parser) xfetchAtts() []fetchAtt {
|
|
defer p.context("fetchAtts")()
|
|
|
|
fields := func(l ...string) []fetchAtt {
|
|
r := make([]fetchAtt, len(l))
|
|
for i, s := range l {
|
|
r[i] = fetchAtt{field: s}
|
|
}
|
|
return r
|
|
}
|
|
|
|
if w, ok := p.takelist("ALL", "FAST", "FULL"); ok {
|
|
switch w {
|
|
case "ALL":
|
|
return fields("FLAGS", "INTERNALDATE", "RFC822.SIZE", "ENVELOPE")
|
|
case "FAST":
|
|
return fields("FLAGS", "INTERNALDATE", "RFC822.SIZE")
|
|
case "FULL":
|
|
return fields("FLAGS", "INTERNALDATE", "RFC822.SIZE", "ENVELOPE", "BODY")
|
|
}
|
|
panic("missing case")
|
|
}
|
|
|
|
if !p.hasPrefix("(") {
|
|
return []fetchAtt{p.xfetchAtt()}
|
|
}
|
|
|
|
l := []fetchAtt{}
|
|
p.xtake("(")
|
|
for {
|
|
l = append(l, p.xfetchAtt())
|
|
if !p.take(" ") {
|
|
break
|
|
}
|
|
}
|
|
p.xtake(")")
|
|
return l
|
|
}
|
|
|
|
func xint(p *parser, s string) int {
|
|
v, err := strconv.ParseInt(s, 10, 32)
|
|
if err != nil {
|
|
p.xerrorf("bad int %q: %v", s, err)
|
|
}
|
|
return int(v)
|
|
}
|
|
|
|
func (p *parser) digit() (string, bool) {
|
|
if p.empty() {
|
|
return "", false
|
|
}
|
|
c := p.orig[p.o]
|
|
if c < '0' || c > '9' {
|
|
return "", false
|
|
}
|
|
s := p.orig[p.o : p.o+1]
|
|
p.o++
|
|
return s, true
|
|
}
|
|
|
|
func (p *parser) xdigit() string {
|
|
s, ok := p.digit()
|
|
if !ok {
|
|
p.xerrorf("expected digit")
|
|
}
|
|
return s
|
|
}
|
|
|
|
// ../rfc/9051:6492 ../rfc/3501:4695
|
|
func (p *parser) xdateDayFixed() int {
|
|
if p.take(" ") {
|
|
return xint(p, p.xdigit())
|
|
}
|
|
return xint(p, p.xdigit()+p.xdigit())
|
|
}
|
|
|
|
var months = []string{"jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"}
|
|
|
|
// ../rfc/9051:6495 ../rfc/3501:4698
|
|
func (p *parser) xdateMonth() time.Month {
|
|
s := strings.ToLower(p.xtaken(3))
|
|
for i, m := range months {
|
|
if m == s {
|
|
return time.Month(1 + i)
|
|
}
|
|
}
|
|
p.xerrorf("unknown month %q", s)
|
|
return 0
|
|
}
|
|
|
|
// ../rfc/9051:7120 ../rfc/3501:5067
|
|
func (p *parser) xtime() (int, int, int) {
|
|
h := xint(p, p.xtaken(2))
|
|
p.xtake(":")
|
|
m := xint(p, p.xtaken(2))
|
|
p.xtake(":")
|
|
s := xint(p, p.xtaken(2))
|
|
return h, m, s
|
|
}
|
|
|
|
// ../rfc/9051:7159 ../rfc/3501:5083
|
|
func (p *parser) xzone() (string, int) {
|
|
sign := p.xtakelist("+", "-")
|
|
s := p.xtaken(4)
|
|
v := xint(p, s)
|
|
seconds := (v/100)*3600 + (v%100)*60
|
|
if sign[0] == '-' {
|
|
seconds = -seconds
|
|
}
|
|
return sign + s, seconds
|
|
}
|
|
|
|
// ../rfc/9051:6502 ../rfc/3501:4713
|
|
func (p *parser) xdateTime() time.Time {
|
|
// DQUOTE date-day-fixed "-" date-month "-" date-year SP time SP zone DQUOTE
|
|
p.xtake(`"`)
|
|
day := p.xdateDayFixed()
|
|
p.xtake("-")
|
|
month := p.xdateMonth()
|
|
p.xtake("-")
|
|
year := xint(p, p.xtaken(4))
|
|
p.xspace()
|
|
hours, minutes, seconds := p.xtime()
|
|
p.xspace()
|
|
name, zoneSeconds := p.xzone()
|
|
p.xtake(`"`)
|
|
loc := time.FixedZone(name, zoneSeconds)
|
|
return time.Date(year, month, day, hours, minutes, seconds, 0, loc)
|
|
}
|
|
|
|
// ../rfc/9051:6655 ../rfc/7888:330 ../rfc/3501:4801
|
|
func (p *parser) xliteralSize(maxSize int64, lit8 bool) (size int64, sync bool) {
|
|
// todo: enforce that we get non-binary when ~ isn't present?
|
|
if lit8 {
|
|
p.take("~")
|
|
}
|
|
p.xtake("{")
|
|
size = p.xnumber64()
|
|
if maxSize > 0 && size > maxSize {
|
|
// ../rfc/7888:249
|
|
line := fmt.Sprintf("* BYE [ALERT] Max literal size %d is larger than allowed %d in this context", size, maxSize)
|
|
err := errors.New("literal too big")
|
|
panic(syntaxError{line, "TOOBIG", err.Error(), err})
|
|
}
|
|
|
|
sync = !p.take("+")
|
|
p.xtake("}")
|
|
p.xempty()
|
|
return size, sync
|
|
}
|
|
|
|
var searchKeyWords = []string{
|
|
"ALL", "ANSWERED", "BCC",
|
|
"BEFORE", "BODY",
|
|
"CC", "DELETED", "FLAGGED",
|
|
"FROM", "KEYWORD",
|
|
"NEW", "OLD", "ON", "RECENT", "SEEN",
|
|
"SINCE", "SUBJECT",
|
|
"TEXT", "TO",
|
|
"UNANSWERED", "UNDELETED", "UNFLAGGED",
|
|
"UNKEYWORD", "UNSEEN",
|
|
"DRAFT", "HEADER",
|
|
"LARGER", "NOT",
|
|
"OR",
|
|
"SENTBEFORE", "SENTON",
|
|
"SENTSINCE", "SMALLER",
|
|
"UID", "UNDRAFT",
|
|
}
|
|
|
|
// ../rfc/9051:6923 ../rfc/3501:4957
|
|
// differences: rfc 9051 removes NEW, OLD, RECENT and makes SMALLER and LARGER number64 instead of number.
|
|
func (p *parser) xsearchKey() *searchKey {
|
|
if p.take("(") {
|
|
sk := p.xsearchKey()
|
|
l := []searchKey{*sk}
|
|
for !p.take(")") {
|
|
p.xspace()
|
|
l = append(l, *p.xsearchKey())
|
|
}
|
|
return &searchKey{searchKeys: l}
|
|
}
|
|
|
|
w, ok := p.takelist(searchKeyWords...)
|
|
if !ok {
|
|
seqs := p.xnumSet()
|
|
return &searchKey{seqSet: &seqs}
|
|
}
|
|
|
|
sk := &searchKey{op: w}
|
|
switch sk.op {
|
|
case "ALL":
|
|
case "ANSWERED":
|
|
case "BCC":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "BEFORE":
|
|
p.xspace()
|
|
sk.date = p.xdate()
|
|
case "BODY":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "CC":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "DELETED":
|
|
case "FLAGGED":
|
|
case "FROM":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "KEYWORD":
|
|
p.xspace()
|
|
sk.atom = p.xatom()
|
|
case "NEW":
|
|
case "OLD":
|
|
case "ON":
|
|
p.xspace()
|
|
sk.date = p.xdate()
|
|
case "RECENT":
|
|
case "SEEN":
|
|
case "SINCE":
|
|
p.xspace()
|
|
sk.date = p.xdate()
|
|
case "SUBJECT":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "TEXT":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "TO":
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "UNANSWERED":
|
|
case "UNDELETED":
|
|
case "UNFLAGGED":
|
|
case "UNKEYWORD":
|
|
p.xspace()
|
|
sk.atom = p.xatom()
|
|
case "UNSEEN":
|
|
case "DRAFT":
|
|
case "HEADER":
|
|
p.xspace()
|
|
sk.headerField = p.xastring()
|
|
p.xspace()
|
|
sk.astring = p.xastring()
|
|
case "LARGER":
|
|
p.xspace()
|
|
sk.number = p.xnumber64()
|
|
case "NOT":
|
|
p.xspace()
|
|
sk.searchKey = p.xsearchKey()
|
|
case "OR":
|
|
p.xspace()
|
|
sk.searchKey = p.xsearchKey()
|
|
p.xspace()
|
|
sk.searchKey2 = p.xsearchKey()
|
|
case "SENTBEFORE":
|
|
p.xspace()
|
|
sk.date = p.xdate()
|
|
case "SENTON":
|
|
p.xspace()
|
|
sk.date = p.xdate()
|
|
case "SENTSINCE":
|
|
p.xspace()
|
|
sk.date = p.xdate()
|
|
case "SMALLER":
|
|
p.xspace()
|
|
sk.number = p.xnumber64()
|
|
case "UID":
|
|
p.xspace()
|
|
sk.uidSet = p.xnumSet()
|
|
case "UNDRAFT":
|
|
default:
|
|
p.xerrorf("missing case for op %q", sk.op)
|
|
}
|
|
return sk
|
|
}
|
|
|
|
// ../rfc/9051:6489 ../rfc/3501:4692
|
|
func (p *parser) xdateDay() int {
|
|
d := p.xdigit()
|
|
if s, ok := p.digit(); ok {
|
|
d += s
|
|
}
|
|
return xint(p, d)
|
|
}
|
|
|
|
// ../rfc/9051:6487 ../rfc/3501:4690
|
|
func (p *parser) xdate() time.Time {
|
|
dquote := p.take(`"`)
|
|
day := p.xdateDay()
|
|
p.xtake("-")
|
|
mon := p.xdateMonth()
|
|
p.xtake("-")
|
|
year := xint(p, p.xtaken(4))
|
|
if dquote {
|
|
p.take(`"`)
|
|
}
|
|
return time.Date(year, mon, day, 0, 0, 0, 0, time.UTC)
|
|
}
|
|
|
|
// ../rfc/9051:7090 ../rfc/4466:716
|
|
func (p *parser) xtaggedExtLabel() string {
|
|
return p.xtake1fn(func(i int, c rune) bool {
|
|
return c >= 'A' && c <= 'Z' || c == '-' || c == '_' || c == '.' || i > 0 && (c >= '0' && c <= '9' || c == ':')
|
|
})
|
|
}
|
|
|
|
// no return value since we don't currently use the value.
|
|
// ../rfc/9051:7111 ../rfc/4466:749
|
|
func (p *parser) xtaggedExtVal() {
|
|
if p.take("(") {
|
|
if p.take(")") {
|
|
return
|
|
}
|
|
p.xtaggedExtComp()
|
|
p.xtake(")")
|
|
} else {
|
|
p.xtaggedExtSimple()
|
|
}
|
|
}
|
|
|
|
// ../rfc/9051:7109 ../rfc/4466:747
|
|
func (p *parser) xtaggedExtSimple() {
|
|
s := p.digits()
|
|
if s == "" {
|
|
p.xnumSet()
|
|
}
|
|
|
|
// This can be a number64, or the start of a sequence-set. A sequence-set can also
|
|
// start with a number, but only an uint32. After the number we'll try to continue
|
|
// parsing as a sequence-set.
|
|
_, err := strconv.ParseInt(s, 10, 64)
|
|
if err != nil {
|
|
p.xerrorf("parsing int: %v", err)
|
|
}
|
|
|
|
if p.take(":") {
|
|
if !p.take("*") {
|
|
p.xnznumber()
|
|
}
|
|
}
|
|
for p.take(",") {
|
|
p.xnumRange()
|
|
}
|
|
}
|
|
|
|
// ../rfc/9051:7111 ../rfc/4466:735
|
|
func (p *parser) xtaggedExtComp() {
|
|
if p.take("(") {
|
|
p.xtaggedExtComp()
|
|
p.xtake(")")
|
|
return
|
|
}
|
|
p.xastring()
|
|
for p.space() {
|
|
p.xtaggedExtComp()
|
|
}
|
|
}
|