feat: migrate lua script to lua file (#4069)

core/limit/periodlimit.go

@@ -2,6 +2,7 @@ package limit
 
 import (
 	"context"
+	_ "embed"
 	"errors"
 	"strconv"
 	"time"
@@ -28,20 +29,10 @@ var (
 	// ErrUnknownCode is an error that represents unknown status code.
 	ErrUnknownCode = errors.New("unknown status code")
 
-	// to be compatible with aliyun redis, we cannot use `local key = KEYS[1]` to reuse the key
-	periodScript = redis.NewScript(`local limit = tonumber(ARGV[1])
-local window = tonumber(ARGV[2])
-local current = redis.call("INCRBY", KEYS[1], 1)
-if current == 1 then
-    redis.call("expire", KEYS[1], window)
-end
-if current < limit then
-    return 1
-elseif current == limit then
-    return 2
-else
-    return 0
-end`)
+	//go:embed periodscript.lua
+	periodScript string
+
+	scriptPeriod = redis.NewScript(periodScript)
 )
 
 type (
@@ -82,7 +73,7 @@ func (h *PeriodLimit) Take(key string) (int, error) {
 
 // TakeCtx requests a permit with context, it returns the permit state.
 func (h *PeriodLimit) TakeCtx(ctx context.Context, key string) (int, error) {
-	resp, err := h.limitStore.ScriptRunCtx(ctx, periodScript, []string{h.keyPrefix + key}, []string{
+	resp, err := h.limitStore.ScriptRunCtx(ctx, scriptPeriod, []string{h.keyPrefix + key}, []string{
 		strconv.Itoa(h.quota),
 		strconv.Itoa(h.calcExpireSeconds()),
 	})