chore: polish random_util (#192)

Signed-off-by: ZhangJian He <shoothzj@gmail.com>

go.mod

@@ -5,6 +5,7 @@ go 1.20
 require (
 	github.com/libgox/addr v0.2.0
 	github.com/libgox/gocollections v0.0.0-20241024144716-59fe0afe6953
+	github.com/libgox/unicodex v0.0.1
 	github.com/prometheus/client_golang v1.20.5
 	github.com/stretchr/testify v1.9.0
 	golang.org/x/exp v0.0.0-20240823005443-9b4947da3948

go.sum

@@ -16,6 +16,8 @@ github.com/libgox/addr v0.2.0 h1:he4Vv7lzcGy/1qNpjJufEWRql0S23Ki/j0XpTDMDu3s=
 github.com/libgox/addr v0.2.0/go.mod h1:j0hEfpRqTZy4BsstS9Egsn1U0JmNdj/VkbF2VBmJlFw=
 github.com/libgox/gocollections v0.0.0-20241024144716-59fe0afe6953 h1:qnlK5i5xCbMjQLqFa6JfNn3r7mtRMwMtuqJjyhgAYK8=
 github.com/libgox/gocollections v0.0.0-20241024144716-59fe0afe6953/go.mod h1:Y4udpR8lStv1f67hVWbMCrcTyTvf98bFFsu/ZXvAvZ0=
+github.com/libgox/unicodex v0.0.1 h1:yUuZWMVXC5N9dcYgIc3aO7+2M5jN+XVatrU08Y5fC4k=
+github.com/libgox/unicodex v0.0.1/go.mod h1:RaB9wNp/oOS0Ew5+Wml7WePjztZ3njXiNid08KOmgjs=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=

opengemini/random_util.go

@@ -17,21 +17,21 @@ package opengemini
 import (
 	"crypto/rand"
 	"math/big"
-)
 
-const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	"github.com/libgox/unicodex/letter"
+)
 
 func RandBytes(n int64) []byte {
 	if n <= 0 {
 		return []byte{}
 	}
 	b := make([]byte, n)
 	for i := range b {
-		index, err := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
+		index, err := rand.Int(rand.Reader, big.NewInt(int64(letter.EnglishCount)))
 		if err != nil {
 			panic(err)
 		}
-		b[i] = letters[index.Int64()]
+		b[i] = letter.EnglishLetters[index.Int64()]
 	}
 	return b
 }