✨ add redis ttl

exemples/redis-cache/docker-compose.redis.yml

@@ -59,7 +59,7 @@ services:
       - "traefik.http.middlewares.crowdsec2.plugin.bouncer.enabled=true"
       # crowdseclapikey must be uniq to the middleware attached to the service
       - "traefik.http.middlewares.crowdsec2.plugin.bouncer.crowdseclapikey=44c36dac5c4140af9f06f397508e82c7"
-      - "traefik.http.middlewares.crowdsec2.plugin.bouncer.rediscacheenabled=false"
+      - "traefik.http.middlewares.crowdsec2.plugin.bouncer.rediscacheenabled=true"
 
 
   crowdsec:

pkg/cache/cache.go

@@ -20,7 +20,6 @@ var redis simpleredis.SimpleRedis
 
 var redisEnabled = false
 
-
 func getDecisionLocalCache(clientIP string) (bool, error) {
 	banned, isCached := cache.Get(clientIP)
 	bannedString, isValid := banned.(string)
@@ -30,29 +29,28 @@ func getDecisionLocalCache(clientIP string) (bool, error) {
 	return false, fmt.Errorf("no cache data")
 }
 
-func SetDecisionLocalCache(clientIP string, value string, duration int64) {
+func setDecisionLocalCache(clientIP string, value string, duration int64) {
 	cache.Set(clientIP, value, duration)
 }
 
-func DeleteDecisionLocalCache(clientIP string) {
+func deleteDecisionLocalCache(clientIP string) {
 	cache.Del(clientIP)
 }
 
 func getDecisionRedisCache(clientIP string) (bool, error) {
-	banned, err := redis.Do("GET", clientIP, nil)
+	banned, err := redis.Get(clientIP)
 	bannedString := string(banned)
-	logger.Info(fmt.Sprintf("%v banned", bannedString))
 	if err == nil && len(bannedString) > 0 {
 		return bannedString == cacheBannedValue, nil
 	}
 	return false, fmt.Errorf("no cache data")
 }
 
-func SetDecisionRedisCache(clientIP string, value string, duration int64) {
+func setDecisionRedisCache(clientIP string, value string, duration int64) {
-	redis.Do("SET", clientIP, []byte(value))
+	redis.Set(clientIP, []byte(value), duration)
 }
 
-func DeleteDecisionRedisCache(clientIP string) {
+func deleteDecisionRedisCache(clientIP string) {
 	// err := rdb.Del(ctx, clientIP).Err()
 	// if err != nil {
 	// 	logger.Info("Error, could not delete in redis cache IP")
@@ -60,15 +58,14 @@ func DeleteDecisionRedisCache(clientIP string) {
 	// errors are not handled
 }
 
-
-
 func DeleteDecision(clientIP string) {
 	if redisEnabled {
-		DeleteDecisionRedisCache(clientIP)
+		deleteDecisionRedisCache(clientIP)
 	} else {
-		DeleteDecisionLocalCache(clientIP)
+		deleteDecisionLocalCache(clientIP)
 	}
 }
+
 // GetDecision check in the cache if the IP has the banned / not banned value.
 // Otherwise return with an error to add the IP in cache if we are on.
 func GetDecision(clientIP string) (bool, error) {
@@ -88,14 +85,14 @@ func SetDecision(clientIP string, isBanned bool, duration int64) {
 		value = cacheNoBannedValue
 	}
 	if redisEnabled {
-		SetDecisionRedisCache(clientIP, value, duration)
+		setDecisionRedisCache(clientIP, value, duration)
 	} else {
-		SetDecisionLocalCache(clientIP, value, duration)
+		setDecisionLocalCache(clientIP, value, duration)
 	}
 }
 
 func InitRedisClient(host string, password string) {
-	logger.Debug("connect to redis")
 	redisEnabled = true
 	redis.Init(host)
+	logger.Debug("connect to redis")
 }

pkg/redis/redis.go

@@ -2,21 +2,19 @@ package simpleredis
 
 import (
 	"fmt"
-	"log"
 	"net"
 	"strconv"
 	"strings"
 	"time"
 
 	"github.com/tehnerd/goUtils/netutils"
-
-	logger "github.com/maxlerebourg/crowdsec-bouncer-traefik-plugin/pkg/logger"
 )
 
 type RedisCmd struct {
 	Command  string
 	Name     string
 	Data     []byte
+	Duration int64
 	Error    error
 }
 
@@ -27,26 +25,17 @@ type SimpleRedis struct {
 	redisCmd       RedisCmd
 }
 
-func GenRedisArray(params ...[]byte) []byte {
+func genRedisArray(params ...[]byte) []byte {
-	CRLF := "\r\n"
 	MSG := ""
 	for cntr := 0; cntr < len(params); cntr++ {
 		MSG = strings.Join([]string{MSG, string(params[cntr])}, " ")
 	}
 	MSG = strings.Trim(MSG, " ")
-	MSG = strings.Join([]string{MSG, CRLF}, "")
+	MSG = strings.Join([]string{MSG, "\r\n"}, "")
 	return []byte(MSG)
 }
 
-func RedisSet(name string, data []byte) []byte {
+func parseResponse(response []byte, dataBuf []byte, Len *int) ([]byte, []byte, error) {
-	return GenRedisArray([]byte("SET"), []byte(name), data)
-}
-
-func RedisGet(name string) []byte {
-	return GenRedisArray([]byte("GET"), []byte(name))
-}
-
-func ParseRedisResponse(response []byte, dataBuf []byte, Len *int) ([]byte, []byte, error) {
 	dataBuf = append(dataBuf, response...)
 	lenCRLF := 2
 	if *Len != 0 {
@@ -116,7 +105,7 @@ func ParseRedisResponse(response []byte, dataBuf []byte, Len *int) ([]byte, []by
 	return nil, dataBuf, nil
 }
 
-func RedisContext(hostnamePort string, redisCmdWrite, redisCmdRead chan RedisCmd) {
+func initContext(hostnamePort string, redisCmdWrite, redisCmdRead chan RedisCmd) {
 	tcpRemoteAddress, err := net.ResolveTCPAddr("tcp", hostnamePort)
 	if err != nil {
 		panic("cant resolve remote redis address")
@@ -131,23 +120,23 @@ func RedisContext(hostnamePort string, redisCmdWrite, redisCmdRead chan RedisCmd
 	<-readChan
 	dataBuf := make([]byte, 0)
 	dataLen := 0
-	for true {
+	for {
 		select {
 		case cmd := <-redisCmdWrite:
 			switch cmd.Command {
 			case "SET":
-				data := RedisSet(cmd.Name, cmd.Data)
+				data := genRedisArray([]byte("SET"), []byte(cmd.Name), cmd.Data, []byte("EX"), []byte(fmt.Sprintf("%v", cmd.Duration)))
 				writeChan <- data
 			case "GET":
-				data := RedisGet(cmd.Name)
+				data := genRedisArray([]byte("GET"), []byte(cmd.Name))
 				writeChan <- data
 			}
 		case response := <-readChan:
-			data, dataBuf, err := ParseRedisResponse(response, dataBuf, &dataLen)
+			data, dataBuf, err := parseResponse(response, dataBuf, &dataLen)
 			if dataLen != 0 {
 				for data == nil {
 					response = <-readChan
-					data, dataBuf, err = ParseRedisResponse(response, dataBuf, &dataLen)
+					data, dataBuf, err = parseResponse(response, dataBuf, &dataLen)
 				}
 			}
 			if err != nil {
@@ -182,13 +171,13 @@ func (sr *SimpleRedis) Init(redisHost string) {
 	sr.redisHost = redisHost
 	sr.redisChanWrite = make(chan RedisCmd)
 	sr.redisChanRead = make(chan RedisCmd)
-	go RedisContext(sr.redisHost, sr.redisChanWrite, sr.redisChanRead)
+	go initContext(sr.redisHost, sr.redisChanWrite, sr.redisChanRead)
 }
 
-func (sr *SimpleRedis) Do(cmd, name string, data []byte) ([]byte, error) {
+func (sr *SimpleRedis) Get(name string) ([]byte, error) {
-	sr.redisCmd.Command = cmd
+	sr.redisCmd.Command = "GET"
 	sr.redisCmd.Name = name
-	sr.redisCmd.Data = data
+	sr.redisCmd.Data = nil
 	sr.redisChanWrite <- sr.redisCmd
 	resp := <-sr.redisChanRead
 	if resp.Error != nil {
@@ -196,3 +185,16 @@ func (sr *SimpleRedis) Do(cmd, name string, data []byte) ([]byte, error) {
 	}
 	return resp.Data, nil
 }
+
+func (sr *SimpleRedis) Set(name string, data []byte, duration int64) error {
+	sr.redisCmd.Command = "SET"
+	sr.redisCmd.Name = name
+	sr.redisCmd.Data = data
+	sr.redisCmd.Duration = duration
+	sr.redisChanWrite <- sr.redisCmd
+	resp := <-sr.redisChanRead
+	if resp.Error != nil {
+		return resp.Error
+	}
+	return nil
+}