package utils import ( "github.com/TeaOSLab/EdgeNode/internal/re" "github.com/TeaOSLab/EdgeNode/internal/ttlcache" "github.com/cespare/xxhash" "strconv" "time" ) var cache = ttlcache.NewCache[int8]() // MatchStringCache 正则表达式匹配字符串,并缓存结果 func MatchStringCache(regex *re.Regexp, s string) bool { if regex == nil { return false } // 如果长度超过4096,大概率是不能重用的 if len(s) > 4096 { return regex.MatchString(s) } var hash = xxhash.Sum64String(s) var key = regex.IdString() + "@" + strconv.FormatUint(hash, 10) var item = cache.Read(key) if item != nil { return item.Value == 1 } var b = regex.MatchString(s) if b { cache.Write(key, 1, time.Now().Unix()+1800) } else { cache.Write(key, 0, time.Now().Unix()+1800) } return b } // MatchBytesCache 正则表达式匹配字节slice,并缓存结果 func MatchBytesCache(regex *re.Regexp, byteSlice []byte) bool { if regex == nil { return false } // 如果长度超过4096,大概率是不能重用的 if len(byteSlice) > 4096 { return regex.Match(byteSlice) } var hash = xxhash.Sum64(byteSlice) var key = regex.IdString() + "@" + strconv.FormatUint(hash, 10) var item = cache.Read(key) if item != nil { return item.Value == 1 } if item != nil { return item.Value == 1 } var b = regex.Match(byteSlice) if b { cache.Write(key, 1, time.Now().Unix()+1800) } else { cache.Write(key, 0, time.Now().Unix()+1800) } return b }