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https://github.com/TeaOSLab/EdgeNode.git
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优化WAF正则表达式缓存时间
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@@ -3,21 +3,34 @@ package utils
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import (
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"github.com/TeaOSLab/EdgeNode/internal/re"
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"github.com/TeaOSLab/EdgeNode/internal/ttlcache"
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"github.com/TeaOSLab/EdgeNode/internal/utils/fasttime"
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"github.com/cespare/xxhash"
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"strconv"
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"time"
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)
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var cache = ttlcache.NewCache[int8]()
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const (
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maxCacheDataSize = 1024
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)
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type CacheLife = int64
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const (
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CacheDisabled CacheLife = 0
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CacheShortLife CacheLife = 600
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CacheMiddleLife CacheLife = 1800
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CacheLongLife CacheLife = 7200
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)
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// MatchStringCache 正则表达式匹配字符串,并缓存结果
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func MatchStringCache(regex *re.Regexp, s string) bool {
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func MatchStringCache(regex *re.Regexp, s string, cacheLife CacheLife) bool {
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if regex == nil {
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return false
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}
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// 如果长度超过4096,大概率是不能重用的
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if len(s) > 4096 {
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// 如果长度超过一定数量,大概率是不能重用的
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if cacheLife <= 0 || len(s) > maxCacheDataSize {
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return regex.MatchString(s)
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}
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@@ -29,21 +42,21 @@ func MatchStringCache(regex *re.Regexp, s string) bool {
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}
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var b = regex.MatchString(s)
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if b {
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cache.Write(key, 1, time.Now().Unix()+1800)
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cache.Write(key, 1, fasttime.Now().Unix()+cacheLife)
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} else {
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cache.Write(key, 0, time.Now().Unix()+1800)
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cache.Write(key, 0, fasttime.Now().Unix()+cacheLife)
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}
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return b
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}
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// MatchBytesCache 正则表达式匹配字节slice,并缓存结果
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func MatchBytesCache(regex *re.Regexp, byteSlice []byte) bool {
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func MatchBytesCache(regex *re.Regexp, byteSlice []byte, cacheLife CacheLife) bool {
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if regex == nil {
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return false
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}
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// 如果长度超过4096,大概率是不能重用的
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if len(byteSlice) > 4096 {
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// 如果长度超过一定数量,大概率是不能重用的
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if cacheLife <= 0 || len(byteSlice) > maxCacheDataSize {
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return regex.Match(byteSlice)
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}
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@@ -58,9 +71,9 @@ func MatchBytesCache(regex *re.Regexp, byteSlice []byte) bool {
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}
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var b = regex.Match(byteSlice)
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if b {
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cache.Write(key, 1, time.Now().Unix()+1800)
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cache.Write(key, 1, fasttime.Now().Unix()+cacheLife)
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} else {
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cache.Write(key, 0, time.Now().Unix()+1800)
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cache.Write(key, 0, fasttime.Now().Unix()+cacheLife)
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}
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return b
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}
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