feat: 0.1.2

1. login page && auth required
  2. file dir cleanup

internal/pkg/tool/random.go

@@ -0,0 +1,54 @@
+package tool
+
+import (
+	"crypto/rand"
+	"math/big"
+)
+
+var (
+	letters   = []byte("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	letterNum = []byte("0123456789")
+	letterLow = []byte("abcdefghijklmnopqrstuvwxyz")
+	letterCap = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	letterSyb = []byte("!@#$%^&*()_+-=")
+)
+
+func RandomInt(max int64) int64 {
+	num, _ := rand.Int(rand.Reader, big.NewInt(max))
+	return num.Int64()
+}
+
+func RandomString(length int) string {
+	result := make([]byte, length)
+	for i := 0; i < length; i++ {
+		num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letters))))
+		result[i] = letters[num.Int64()]
+	}
+	return string(result)
+}
+
+func RandomPassword(length int, withSymbol bool) string {
+	result := make([]byte, length)
+	kind := 3
+	if withSymbol {
+		kind++
+	}
+
+	for i := 0; i < length; i++ {
+		switch i % kind {
+		case 0:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterNum))))
+			result[i] = letterNum[num.Int64()]
+		case 1:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterLow))))
+			result[i] = letterLow[num.Int64()]
+		case 2:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterCap))))
+			result[i] = letterCap[num.Int64()]
+		case 3:
+			num, _ := rand.Int(rand.Reader, big.NewInt(int64(len(letterSyb))))
+			result[i] = letterSyb[num.Int64()]
+		}
+	}
+	return string(result)
+}