overflow_discovery/service/matcher/redis/protected/redisProtected.go

package protected

import (
	"git.loafle.net/overflow/overflow_discovery/service/matcher"
)

const (
	COMPARE_STR_1 = "-"
	COMPARE_STR_2 = "DENIED"
)

type RedisProtectedMatcher struct {
	matcher.Matchers
}

func (r *RedisProtectedMatcher) ServiceName() string {
	return "Redis:Protected"
}

func (r *RedisProtectedMatcher) IsPrePacket() bool {
	return true
}

func (r *RedisProtectedMatcher) HasResponse(index int) bool {
	return true
}

func (r *RedisProtectedMatcher) IsError(info matcher.MatchInfo, index int, packet *matcher.Packet) bool {
	return false
}

func (r *RedisProtectedMatcher) Match(info matcher.MatchInfo, index int, packet *matcher.Packet) bool {

	if packet == nil {
		return false
	}

	switch index {
	case 0:
		str := string(packet.Buffer[:packet.Len])

		if str == "" {
			return false
		}
		if len(str) <= 0 {
			return false
		}

		firstCompare := str[0:1]
		seconcdCompare := str[1 : len(COMPARE_STR_2)+1]

		if firstCompare != COMPARE_STR_1 {
			return false
		}
		if seconcdCompare != COMPARE_STR_2 {
			return false
		}

		return true
	}

	return false

}

func NewMatcher() matcher.Matcher {
	m := &RedisProtectedMatcher{}

	return m
}