Migrate to LevelDB

Signed-off-by: Yuan Si <do4suki@gmail.com>

database/utils.go

@@ -0,0 +1,18 @@
+package database
+
+import "fmt"
+
+func MatchTokenUid(token, uid string) bool {
+	// ret := LevelDb.List()
+	// for k, v := range ret {
+	// 	fmt.Println(k, v)
+	// 	fmt.Println()
+	// }
+	res, err := LevelDb.Get([]byte(token))
+	if err != nil {
+		fmt.Println(err)
+		return false
+	}
+
+	return string(res) == uid
+}