package utils import ( "fmt" "github.com/TeaOSLab/EdgeNode/internal/ttlcache" "github.com/TeaOSLab/EdgeNode/internal/utils" "github.com/dchest/siphash" "github.com/iwind/TeaGo/types" "regexp" "strconv" "time" ) //var grid = grids.NewGrid(32, grids.NewLimitCountOpt(1000_0000)) var cache = ttlcache.NewCache() // 正则表达式匹配字符串,并缓存结果 func MatchStringCache(regex *regexp.Regexp, s string) bool { // 如果长度超过4096,大概率是不能重用的 if len(s) > 4096 { return regex.MatchString(s) } hash := siphash.Hash(0, 0, utils.UnsafeStringToBytes(s)) key := fmt.Sprintf("%p_", regex) + strconv.FormatUint(hash, 10) item := cache.Read(key) if item != nil { return types.Int8(item.Value) == 1 } 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 } // 正则表达式匹配字节slice,并缓存结果 func MatchBytesCache(regex *regexp.Regexp, byteSlice []byte) bool { // 如果长度超过4096,大概率是不能重用的 if len(byteSlice) > 4096 { return regex.Match(byteSlice) } hash := siphash.Hash(0, 0, byteSlice) key := fmt.Sprintf("%p_", regex) + strconv.FormatUint(hash, 10) item := cache.Read(key) if item != nil { return types.Int8(item.Value) == 1 } if item != nil { return types.Int8(item.Value) == 1 } 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 }