func (s *Session) handleSelect(r *Request) (*Request, error) {
if len(r.Resp.Array) != 2 {
r.Response.Resp = redis.NewError([]byte("ERR wrong number of arguments for 'SELECT' command"))
return r, nil
}
if db, err := strconv.Atoi(string(r.Resp.Array[1].Value)); err != nil {
r.Response.Resp = redis.NewError([]byte("ERR invalid DB index"))
return r, nil
} else if db != 0 {
r.Response.Resp = redis.NewError([]byte("ERR invalid DB index, only accept DB 0"))
return r, nil
} else {
r.Response.Resp = redis.NewString([]byte("OK"))
return r, nil
}
}
func (s *Session) handlePing(r *Request) (*Request, error) {
if len(r.Resp.Array) != 1 {
r.Response.Resp = redis.NewError([]byte("ERR wrong number of arguments for 'PING' command"))
return r, nil
}
r.Response.Resp = redis.NewString([]byte("PONG"))
return r, nil
}
func (s *Session) handleAuth(r *Request) (*Request, error) {
if len(r.Resp.Array) != 2 {
r.Response.Resp = redis.NewError([]byte("ERR wrong number of arguments for 'AUTH' command"))
return r, nil
}
if s.auth == "" {
r.Response.Resp = redis.NewError([]byte("ERR Client sent AUTH, but no password is set"))
return r, nil
}
if s.auth != string(r.Resp.Array[1].Value) {
s.authorized = false
r.Response.Resp = redis.NewError([]byte("ERR invalid password"))
return r, nil
} else {
s.authorized = true
r.Response.Resp = redis.NewString([]byte("OK"))
return r, nil
}
}
func (s *Session) handleRequest(resp *redis.Resp, d Dispatcher) (*Request, error) {
opstr, err := getOpStr(resp)
if err != nil {
return nil, err
}
if isNotAllowed(opstr) {
return nil, errors.New(fmt.Sprintf("command <%s> is not allowed", opstr))
}
usnow := microseconds()
s.LastOpUnix = usnow / 1e6
s.Ops++
r := &Request{
OpStr: opstr,
Start: usnow,
Resp: resp,
Wait: &sync.WaitGroup{},
Failed: &s.failed,
}
if opstr == "QUIT" {
return s.handleQuit(r)
}
if opstr == "AUTH" {
return s.handleAuth(r)
}
if !s.authorized {
if s.auth != "" {
r.Response.Resp = redis.NewError([]byte("NOAUTH Authentication required."))
return r, nil
}
s.authorized = true
}
switch opstr {
case "SELECT":
return s.handleSelect(r)
case "PING":
return s.handlePing(r)
case "MGET":
return s.handleRequestMGet(r, d)
case "MSET":
return s.handleRequestMSet(r, d)
case "DEL":
return s.handleRequestMDel(r, d)
}
return r, d.Dispatch(r)
}
func (s *Session) handleRequestMSet(r *Request, d Dispatcher) (*Request, error) {
nblks := len(r.Resp.Array) - 1
if nblks <= 2 {
return r, d.Dispatch(r)
}
if nblks%2 != 0 {
r.Response.Resp = redis.NewError([]byte("ERR wrong number of arguments for 'MSET' command"))
return r, nil
}
var sub = make([]*Request, nblks/2)
for i := 0; i < len(sub); i++ {
sub[i] = &Request{
OpStr: r.OpStr,
Start: r.Start,
Resp: redis.NewArray([]*redis.Resp{
r.Resp.Array[0],
r.Resp.Array[i*2+1],
r.Resp.Array[i*2+2],
}),
Wait: r.Wait,
Failed: r.Failed,
}
if err := d.Dispatch(sub[i]); err != nil {
return nil, err
}
}
r.Coalesce = func() error {
for _, x := range sub {
if err := x.Response.Err; err != nil {
return err
}
resp := x.Response.Resp
if resp == nil {
return ErrRespIsRequired
}
if !resp.IsString() {
return errors.New(fmt.Sprintf("bad mset resp: %s value.len = %d", resp.Type, len(resp.Value)))
}
r.Response.Resp = resp
}
return nil
}
return r, nil
}