Merge branch 'rc' of github.com:duke-git/lancet into rc

Co-authored-by: 燕归来 <dylan@infinni.io>

README.md

@@ -4,7 +4,7 @@
 <br/>
 
 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.3.5-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.3.7-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
@@ -214,6 +214,30 @@ import "github.com/duke-git/lancet/v2/concurrency"
 -   **<big>Tee</big>** : split one chanel into two channels, until cancel the context.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#Tee)]
     [[play](https://go.dev/play/p/3TQPKnCirrP)]
+-   **<big>NewKeyedLocker</big>** : KeyedLocker is a simple implementation of a keyed locker that allows for non-blocking lock acquisition.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#NewKeyedLocker)]
+    [[play](https://go.dev/play/p/GzeyC33T5rw)]
+-   **<big>Do</big>** :acquires a lock for the specified key and executes the provided function.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#Do)]
+    [[play](https://go.dev/play/p/GzeyC33T5rw)]
+-   **<big>NewRWKeyedLocker</big>** :RRWKeyedLocker is a read-write version of KeyedLocker.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#NewRWKeyedLocker)]
+    [[play](https://go.dev/play/p/ZrCr8sMo77T)]
+-   **<big>RLock</big>** : acquires a read lock for the specified key and executes the provided function.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#RLock)]
+    [[play](https://go.dev/play/p/ZrCr8sMo77T)]
+-   **<big>Lock</big>** : acquires a write lock for the specified key and executes the provided function.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#Lock)]
+    [[play](https://go.dev/play/p/WgAcXbOPKGk)]
+-   **<big>NewTryKeyedLocker</big>** : TryKeyedLocker is a non-blocking version of KeyedLocker.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#NewTryKeyedLocker)]
+    [[play](https://go.dev/play/p/VG9qLvyetE2)]
+-   **<big>TryLock</big>** : TryLock tries to acquire a lock for the specified key.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#TryLock)]
+    [[play](https://go.dev/play/p/VG9qLvyetE2)]
+-   **<big>Unlock</big>** : Unlock releases the lock for the specified key.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/concurrency.md#Unlock)]
+    [[play](https://go.dev/play/p/VG9qLvyetE2)]
 
 <h3 id="condition"> 4. Condition package contains some functions for conditional judgment. eg. And, Or, TernaryOperator...&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a> </h3>
 
@@ -331,7 +355,7 @@ import "github.com/duke-git/lancet/v2/convertor"
 -   **<big>ToRawUrlBase64</big>** : converts a value to a string encoded in raw url Base64.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/convertor.md#ToRawUrlBase64)]
     [[play](https://go.dev/play/p/HwdDPFcza1O)]
--   **<big>ToBigInt</big>** : converts an integer of any supported type (int, int64, uint64, etc.) to *big.Int.
+-   **<big>ToBigInt</big>** : converts an integer of any supported type (int, int64, uint64, etc.) to \*big.Int.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/convertor.md#ToBigInt)]
     [[play](https://go.dev/play/p/X3itkCxwB_x)]
 
@@ -694,7 +718,6 @@ import optional "github.com/duke-git/lancet/v2/datastructure/optional"
 -   **<big>Optional</big>** : Optional container.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/datastructure/optional.md)]
 
-
 <h3 id="eventbus"> 9. EventBus is an event bus used for handling events within an application. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">Index</a></h3>
 
 ```go
@@ -778,6 +801,9 @@ import "github.com/duke-git/lancet/v2/fileutil"
 -   **<big>RemoveFile</big>** : remove file, param should be file path.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/fileutil.md#RemoveFile)]
     [[play](https://go.dev/play/p/P2y0XW8a1SH)]
+-   **<big>RemoveDir</big>** : delete directory.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/fileutil.md#RemoveDir)]
+    [[play](https://go.dev/play/p/Oa6KnPek2uy)]
 -   **<big>ReadFileToString</big>** : return string of file content.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/fileutil.md#ReadFileToString)]
     [[play](https://go.dev/play/p/cmfwp_5SQTp)]
@@ -926,7 +952,6 @@ import "github.com/duke-git/lancet/v2/function"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/function.md#Watcher)]
     [[play](https://go.dev/play/p/l2yrOpCLd1I)]
 
-
 <h3 id="maputil"> 12. Maputil package includes some functions to manipulate map.&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
 ```go
@@ -1097,7 +1122,9 @@ import "github.com/duke-git/lancet/v2/maputil"
 -   **<big>GetOrDefault</big>** : returns the value of the given key or a default value if the key is not present.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/maputil.md#GetOrDefault)]
     [[play](https://go.dev/play/p/99QjSYSBdiM)]
-
+-   **<big>FindValuesBy</big>** : returns a slice of values from the map that satisfy the given predicate function.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/maputil.md#FindValuesBy)]
+    [[play](https://go.dev/play/p/bvNwNBZDm6v)]
 
 <h3 id="mathutil"> 13. Mathutil package implements some functions for math calculation. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
@@ -1282,6 +1309,12 @@ import "github.com/duke-git/lancet/v2/netutil"
 -   **<big>IsTelnetConnected</big>** : checks if can if can telnet the specified host or not.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/netutil.md#IsTelnetConnected)]
     [[play](https://go.dev/play/p/yiLCGtQv_ZG)]
+-   **<big>BuildUrl</big>** : builds a URL from the given params.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/netutil.md#BuildUrl)]
+    [[play](https://go.dev/play/p/JLXl1hZK7l4)]
+-   **<big>AddQueryParams</big>** : adds query parameters to the given URL.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/netutil.md#AddQueryParams)]
+    [[play](https://go.dev/play/p/JLXl1hZK7l4)]
 
 <h3 id="pointer"> 15. Pointer package contains some util functions to operate go pointer. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
@@ -1408,7 +1441,6 @@ import "github.com/duke-git/lancet/v2/retry"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/retry.md#RetryWithExponentialWithJitterBackoff)]
     [[play](https://go.dev/play/p/xp1avQmn16X)]
 
-
 <h3 id="slice"> 18. Slice contains some functions to manipulate slice. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
 ```go
@@ -2012,7 +2044,6 @@ import "github.com/duke-git/lancet/v2/system"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/system.md#GetProcessInfo)]
     [[play](https://go.dev/play/p/NQDVywEYYx7)]
 
-
 <h3 id="tuple"> 23. Tuple package implements tuple data type and some operations on it. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
 ```go
@@ -2195,6 +2226,9 @@ import "github.com/duke-git/lancet/v2/validator"
 -   **<big>IsNumberStr</big>** : check if the string can convert to a number.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/validator.md#IsNumberStr)]
     [[play](https://go.dev/play/p/LzaKocSV79u)]
+-   **<big>IsAlphaNumeric</big>** : check if the string is alphanumeric.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/validator.md#IsAlphaNumeric)]
+    [[play](https://go.dev/play/p/RHeESLrLg9c)]
 -   **<big>IsJSON</big>** : check if the string is valid JSON.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/validator.md#IsJSON)]
     [[play](https://go.dev/play/p/8Kip1Itjiil)]
@@ -2324,6 +2358,7 @@ import "github.com/duke-git/lancet/v2/xerror"
 #### [Contribution Guide](./CONTRIBUTION.md)
 
 ## Contributors
+
 Thank you to all the people who contributed to lancet!
 
 <a href="https://github.com/duke-git/lancet/graphs/contributors">

README_zh-CN.md

@@ -4,7 +4,7 @@
 <br/>
 
 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.3.5-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.3.7-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
@@ -101,7 +101,6 @@ func main() {
 -   [Validator](#user-content-validator)
 -   [Xerror](#user-content-xerror)
 
-
 <h3 id="algorithm"> 1. algorithm 包实现一些基本查找和排序算法。 &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
 ```go
@@ -214,6 +213,30 @@ import "github.com/duke-git/lancet/v2/concurrency"
 -   **<big>Tee</big>** : 将一个 channel 分成两个 channel，直到取消上下文。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#Tee)]
     [[play](https://go.dev/play/p/3TQPKnCirrP)]
+-   **<big>NewKeyedLocker</big>** : NewKeyedLocker 创建一个新的 KeyedLocker，并为锁的过期设置指定的 TTL。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#NewKeyedLocker)]
+    [[play](https://go.dev/play/p/GzeyC33T5rw)]
+-   **<big>Do</big>** :为指定的键获取锁并执行提供的函数。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#Do)]
+    [[play](https://go.dev/play/p/GzeyC33T5rw)]
+-   **<big>NewRWKeyedLocker</big>** :RWKeyedLocker 是一个简单的键值读写锁实现，允许非阻塞的锁获取。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#NewRWKeyedLocker)]
+    [[play](https://go.dev/play/p/ZrCr8sMo77T)]
+-   **<big>RLock</big>** : 为指定的键获取读锁并执行提供的函数。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#RLock)]
+    [[play](https://go.dev/play/p/ZrCr8sMo77T)]
+-   **<big>Lock</big>** : 为指定的键获取锁并执行提供的函数。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#Lock)]
+    [[play](https://go.dev/play/p/WgAcXbOPKGk)]
+-   **<big>NewTryKeyedLocker</big>** : 创建一个 TryKeyedLocker 实例，TryKeyedLocker 是 KeyedLocker 的非阻塞版本。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#NewTryKeyedLocker)]
+    [[play](https://go.dev/play/p/VG9qLvyetE2)]
+-   **<big>TryLock</big>** : TryLock 尝试获取指定键的锁。如果锁成功获取，则返回 true，否则返回 false。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#TryLock)]
+    [[play](https://go.dev/play/p/VG9qLvyetE2)]
+-   **<big>Unlock</big>** : 释放指定键的锁。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/concurrency.md#Unlock)]
+    [[play](https://go.dev/play/p/VG9qLvyetE2)]
 
 <h3 id="condition"> 4. condition 包含一些用于条件判断的函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
@@ -331,7 +354,7 @@ import "github.com/duke-git/lancet/v2/convertor"
 -   **<big>ToRawUrlBase64</big>** : 将值转换为 RawUrlBase64 编码的字符串。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/convertor.md#ToRawUrlBase64)]
     [[play](https://go.dev/play/p/HwdDPFcza1O)]
--   **<big>ToBigInt</big>** : 将整数转为*big.Int。
+-   **<big>ToBigInt</big>** : 将整数转为\*big.Int。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/convertor.md#ToBigInt)]
     [[play](https://go.dev/play/p/X3itkCxwB_x)]
 
@@ -355,9 +378,15 @@ import "github.com/duke-git/lancet/v2/cryptor"
 -   **<big>AesCbcDecrypt</big>** : 使用 AES CBC 算法模式解密数据。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#AesCbcDecrypt)]
     [[play](https://go.dev/play/p/IOq_g8_lKZD)]
--   **<big>AesCtrCrypt</big>** : 使用 AES CTR 算法模式加密/解密数据。
+-   **<big>AesCtrCrypt<sup>deprecated</sup></big>** : 使用 AES CTR 算法模式加密/解密数据。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#AesCtrCrypt)]
     [[play](https://go.dev/play/p/SpaZO0-5Nsp)]
+-   **<big>AesCtrEncrypt</big>** : 使用 AES CTR 算法模式加密数据。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#AesCtrCrypt)]
+    [[play](https://go.dev/play/p/x6pjPAvThRz)]
+-   **<big>AesCtrDecrypt</big>** : 使用 AES CTR 算法模式解密数据。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#AesCtrCrypt)]
+    [[play](https://go.dev/play/p/x6pjPAvThRz)]
 -   **<big>AesCfbEncrypt</big>** : 使用 AES CFB 算法模式加密数据。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#AesCfbEncrypt)]
     [[play](https://go.dev/play/p/tfkF10B13kH)]
@@ -394,9 +423,15 @@ import "github.com/duke-git/lancet/v2/cryptor"
 -   **<big>DesCbcDecrypt</big>** : 使用 DES CBC 算法模式解密数据。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#DesCbcDecrypt)]
     [[play](https://go.dev/play/p/4cC4QvWfe3_1)]
--   **<big>DesCtrCrypt</big>** : 使用 DES CTR 算法模式加密/解密数据。
+-   **<big>DesCtrCrypt<sup>deprecated</sup></big>** : 使用 DES CTR 算法模式加密/解密数据。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#DesCtrCrypt)]
     [[play](https://go.dev/play/p/9-T6OjKpcdw)]
+-   **<big>DesCtrEncrypt</big>** : 使用 DES CTR 算法模式加密数据。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#DesCtrEncrypt)]
+    [[play](https://go.dev/play/p/S6p_WHCgH1d)]
+-   **<big>DesCtrDecrypt</big>** : 使用 DES CTR 算法模式解密数据。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#DesCtrDecrypt)]
+    [[play](https://go.dev/play/p/S6p_WHCgH1d)]
 -   **<big>DesCfbEncrypt</big>** : 使用 DES CFB 算法模式加密数据。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#DesCfbEncrypt)]
     [[play](https://go.dev/play/p/y-eNxcFBlxL)]
@@ -658,7 +693,6 @@ import "github.com/duke-git/lancet/v2/datetime"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/datetime.md#MaxMin)]
     [[play](https://go.dev/play/p/rbW51cDtM_2)]
 
-
 <h3 id="datastructure"> 8. datastructure 包含一些普通的数据结构实现。例如：list, linklist, stack, queue, set, tree, graph。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
 ```go
@@ -777,6 +811,9 @@ import "github.com/duke-git/lancet/v2/fileutil"
 -   **<big>RemoveFile</big>** : 删除文件。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/fileutil.md#RemoveFile)]
     [[play](https://go.dev/play/p/P2y0XW8a1SH)]
+-   **<big>RemoveDir</big>** : 删除目录，支持传入删除前的回调函数。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/fileutil.md#RemoveDir)]
+    [[play](https://go.dev/play/p/Oa6KnPek2uy)]
 -   **<big>ReadFileToString</big>** : 读取文件内容并返回字符串。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/fileutil.md#ReadFileToString)]
     [[play](https://go.dev/play/p/cmfwp_5SQTp)]
@@ -832,7 +869,6 @@ import "github.com/duke-git/lancet/v2/fileutil"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/fileutil.md#GetExeOrDllVersion)]
     [[play](https://go.dev/play/p/iLRrDBhE38E)]
 
-
 <h3 id="formatter"> 11. formatter 格式化器包含一些数据格式化处理方法。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
 ```go
@@ -926,8 +962,6 @@ import "github.com/duke-git/lancet/v2/function"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/function.md#Watcher)]
     [[play](https://go.dev/play/p/l2yrOpCLd1I)]
 
-
-
 <h3 id="maputil"> 13. maputil 包括一些操作 map 的函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
 ```go
@@ -1098,6 +1132,9 @@ import "github.com/duke-git/lancet/v2/maputil"
 -   **<big>GetOrDefault</big>** : 返回给定键的值，如果键不存在，则返回默认值。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/maputil.md#GetOrDefault)]
     [[play](https://go.dev/play/p/99QjSYSBdiM)]
+-   **<big>FindValuesBy</big>** : 返回一个切片，包含满足给定谓词判断函数的 map 中的值。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/maputil.md#FindValuesBy)]
+    [[play](https://go.dev/play/p/bvNwNBZDm6v)]
 
 <h3 id="mathutil"> 14. mathutil 包实现了一些数学计算的函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
@@ -1282,6 +1319,12 @@ import "github.com/duke-git/lancet/v2/netutil"
 -   **<big>IsTelnetConnected</big>** : 检查能否 telnet 到主机。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/netutil.md#IsTelnetConnected)]
     [[play](https://go.dev/play/p/yiLCGtQv_ZG)]
+-   **<big>BuildUrl</big>** : 创建 url 字符串。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/netutil.md#BuildUrl)]
+    [[play](https://go.dev/play/p/JLXl1hZK7l4)]
+-   **<big>AddQueryParams</big>** : 向 url 添加查询参数。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/netutil.md#AddQueryParams)]
+    [[play](https://go.dev/play/p/JLXl1hZK7l4)]
 
 <h3 id="pointer"> 16. pointer 包支持一些指针类型的操作。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
@@ -1405,8 +1448,6 @@ import "github.com/duke-git/lancet/v2/retry"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/retry.md#RetryWithExponentialWithJitterBackoff)]
     [[play](https://go.dev/play/p/xp1avQmn16X)]
 
-
-
 <h3 id="slice"> 19. slice 包含操作切片的方法集合。&nbsp; &nbsp; &nbsp; &nbsp; <a href="#index">回到目录</a></h3>
 
 ```go
@@ -1964,7 +2005,6 @@ import "github.com/duke-git/lancet/v2/strutil"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/strutil.md#FindAllOccurrences)]
     [[play](https://go.dev/play/p/uvyA6azGLB1)]
 
-
 <h3 id="system"> 23. system 包含 os, runtime, shell command 的相关函数。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
 ```go
@@ -2013,8 +2053,6 @@ import "github.com/duke-git/lancet/v2/system"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/system.md#GetProcessInfo)]
     [[play](https://go.dev/play/p/NQDVywEYYx7)]
 
-
-
 <h3 id="tuple"> 24. Tuple 包实现一个元组数据类型。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
 ```go
@@ -2197,6 +2235,9 @@ import "github.com/duke-git/lancet/v2/validator"
 -   **<big>IsNumberStr</big>** : 验证字符串是否是可以转换为数字。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/validator.md#IsNumberStr)]
     [[play](https://go.dev/play/p/LzaKocSV79u)]
+-   **<big>IsAlphaNumeric</big>** : 验证字符串是字母或数字。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/validator.md#IsAlphaNumeric)]
+    [[play](https://go.dev/play/p/RHeESLrLg9c)]
 -   **<big>IsJSON</big>** : 验证字符串是否是有效 json。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/validator.md#IsJSON)]
     [[play](https://go.dev/play/p/8Kip1Itjiil)]

concurrency/channel_example_test.go

@@ -3,6 +3,7 @@ package concurrency
 import (
 	"context"
 	"fmt"
+	"log"
 	"time"
 )
 
@@ -199,3 +200,159 @@ func ExampleChannel_Bridge() {
 	// true
 	// true
 }
+
+func ExampleKeyedLocker_Do() {
+	locker := NewKeyedLocker[string](2 * time.Second)
+
+	task := func() {
+		fmt.Println("Executing task...")
+		time.Sleep(1 * time.Second)
+		fmt.Println("Task completed.")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	if err := locker.Do(ctx, "mykey", task); err != nil {
+		log.Fatalf("Error executing task: %v\n", err)
+	} else {
+		fmt.Println("Task successfully executed.")
+	}
+
+	ctx2, cancel2 := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel2()
+
+	if err := locker.Do(ctx2, "mykey", task); err != nil {
+		log.Fatalf("Error executing task: %v\n", err)
+	} else {
+		fmt.Println("Task successfully executed.")
+	}
+
+	// Output:
+	// Executing task...
+	// Task completed.
+	// Task successfully executed.
+	// Executing task...
+	// Task completed.
+	// Task successfully executed.
+}
+
+func ExampleRWKeyedLocker_Lock() {
+	locker := NewRWKeyedLocker[string](2 * time.Second)
+
+	// Simulate a key
+	key := "resource_key"
+
+	fn := func() {
+		fmt.Println("Starting write operation...")
+		// Simulate write operation, assuming it takes 2 seconds
+		time.Sleep(200 * time.Millisecond)
+		fmt.Println("Write operation completed!")
+	}
+
+	// Acquire the write lock and execute the operation
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancel()
+
+	// Execute the lock operation with a 3-second timeout
+	err := locker.Lock(ctx, key, fn)
+	if err != nil {
+		return
+	}
+
+	//output:
+	//Starting write operation...
+	//Write operation completed!
+}
+
+func ExampleRWKeyedLocker_RLock() {
+	locker := NewRWKeyedLocker[string](2 * time.Second)
+
+	// Simulate a key
+	key := "resource_key"
+
+	fn := func() {
+		fmt.Println("Starting write operation...")
+		// Simulate write operation, assuming it takes 2 seconds
+		time.Sleep(200 * time.Millisecond)
+		fmt.Println("Write operation completed!")
+	}
+
+	// Acquire the write lock and execute the operation
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancel()
+
+	// Execute the lock operation with a 3-second timeout
+	err := locker.RLock(ctx, key, fn)
+	if err != nil {
+		return
+	}
+
+	//output:
+	//Starting write operation...
+	//Write operation completed!
+}
+
+func ExampleTryKeyedLocker() {
+	locker := NewTryKeyedLocker[string]()
+
+	key := "resource_key"
+
+	if locker.TryLock(key) {
+		fmt.Println("Lock acquired")
+		time.Sleep(1 * time.Second)
+		// Unlock after work is done
+		locker.Unlock(key)
+		fmt.Println("Lock released")
+	} else {
+		fmt.Println("Lock failed")
+	}
+
+	//output:
+	//Lock acquired
+	//Lock released
+}
+
+func ExampleTryKeyedLocker_TryLock() {
+	locker := NewTryKeyedLocker[string]()
+
+	key := "resource_key"
+
+	done := make(chan struct{})
+	go func() {
+		if locker.TryLock(key) {
+			time.Sleep(2 * time.Second)
+			locker.Unlock(key)
+		}
+		close(done)
+	}()
+
+	time.Sleep(100 * time.Millisecond)
+
+	if locker.TryLock(key) {
+		fmt.Println("Lock acquired")
+		locker.Unlock(key)
+	} else {
+		fmt.Println("Lock failed")
+	}
+
+	// wait for the goroutine to finish
+	<-done
+
+	fmt.Println("Retrying...")
+	time.Sleep(100 * time.Millisecond)
+
+	if locker.TryLock(key) {
+		fmt.Println("Lock acquired")
+		locker.Unlock(key)
+		fmt.Println("Lock released")
+	} else {
+		fmt.Println("Lock failed")
+	}
+
+	// Output:
+	// Lock failed
+	// Retrying...
+	// Lock acquired
+	// Lock released
+}

concurrency/keyed_locker.go

@@ -2,7 +2,6 @@
 // Use of this source code is governed by MIT license
 
 // Package concurrency contain some functions to support concurrent programming. eg, goroutine, channel, locker.
-
 package concurrency
 
 import (
@@ -26,12 +25,14 @@ type lockEntry struct {
 
 // NewKeyedLocker creates a new KeyedLocker with the specified TTL for lock expiration.
 // The TTL is used to automatically release locks that are no longer held.
+// Play: https://go.dev/play/p/GzeyC33T5rw
 func NewKeyedLocker[K comparable](ttl time.Duration) *KeyedLocker[K] {
 	return &KeyedLocker[K]{ttl: ttl}
 }
 
 // Do acquires a lock for the specified key and executes the provided function.
 // It returns an error if the context is canceled before the function completes.
+// Play: https://go.dev/play/p/GzeyC33T5rw
 func (l *KeyedLocker[K]) Do(ctx context.Context, key K, fn func()) error {
 	entry := l.acquire(key)
 	defer l.release(key, entry, key)
@@ -108,12 +109,14 @@ type rwLockEntry struct {
 
 // NewRWKeyedLocker creates a new RWKeyedLocker with the specified TTL for lock expiration.
 // The TTL is used to automatically release locks that are no longer held.
+// Play: https://go.dev/play/p/CkaJWWwZm9
 func NewRWKeyedLocker[K comparable](ttl time.Duration) *RWKeyedLocker[K] {
 	return &RWKeyedLocker[K]{ttl: ttl}
 }
 
 // RLock acquires a read lock for the specified key and executes the provided function.
 // It returns an error if the context is canceled before the function completes.
+// Play: https://go.dev/play/p/ZrCr8sMo77T
 func (l *RWKeyedLocker[K]) RLock(ctx context.Context, key K, fn func()) error {
 	entry := l.acquire(key)
 	defer l.release(entry, key)
@@ -142,6 +145,7 @@ func (l *RWKeyedLocker[K]) RLock(ctx context.Context, key K, fn func()) error {
 
 // Lock acquires a write lock for the specified key and executes the provided function.
 // It returns an error if the context is canceled before the function completes.
+// Play: https://go.dev/play/p/WgAcXbOPKGk
 func (l *RWKeyedLocker[K]) Lock(ctx context.Context, key K, fn func()) error {
 	entry := l.acquire(key)
 	defer l.release(entry, key)
@@ -200,12 +204,14 @@ type TryKeyedLocker[K comparable] struct {
 }
 
 // NewTryKeyedLocker creates a new TryKeyedLocker.
+// Play: https://go.dev/play/p/VG9qLvyetE2
 func NewTryKeyedLocker[K comparable]() *TryKeyedLocker[K] {
 	return &TryKeyedLocker[K]{locks: make(map[K]*casMutex)}
 }
 
 // TryLock tries to acquire a lock for the specified key.
 // It returns true if the lock was acquired, false otherwise.
+// Play: https://go.dev/play/p/VG9qLvyetE2
 func (l *TryKeyedLocker[K]) TryLock(key K) bool {
 	l.mu.Lock()
 
@@ -220,6 +226,7 @@ func (l *TryKeyedLocker[K]) TryLock(key K) bool {
 }
 
 // Unlock releases the lock for the specified key.
+// Play: https://go.dev/play/p/VG9qLvyetE2
 func (l *TryKeyedLocker[K]) Unlock(key K) {
 	l.mu.Lock()
 	defer l.mu.Unlock()

cryptor/basic.go

@@ -6,7 +6,6 @@
 package cryptor
 
 import (
-	"bufio"
 	"crypto/hmac"
 	"crypto/md5"
 	"crypto/sha1"
@@ -66,34 +65,37 @@ func Md5ByteWithBase64(data []byte) string {
 
 // Md5File return the md5 value of file.
 func Md5File(filename string) (string, error) {
-	if fileInfo, err := os.Stat(filename); err != nil {
-		return "", err
-	} else if fileInfo.IsDir() {
-		return "", nil
-	}
-
 	file, err := os.Open(filename)
 	if err != nil {
 		return "", err
 	}
 	defer file.Close()
 
-	hash := md5.New()
+	stat, err := file.Stat()
-
-	chunkSize := 65536
-	for buf, reader := make([]byte, chunkSize), bufio.NewReader(file); ; {
-		n, err := reader.Read(buf)
 	if err != nil {
+		return "", err
+	}
+	if stat.IsDir() {
+		return "", nil
+	}
+
+	hash := md5.New()
+	buf := make([]byte, 65536) // 64KB
+
+	for {
+		n, err := file.Read(buf)
+		if err != nil && err != io.EOF {
+			return "", err
+		}
+		if n > 0 {
+			hash.Write(buf[:n])
+		}
 		if err == io.EOF {
 			break
 		}
-			return "", err
-		}
-		hash.Write(buf[:n])
 	}
 
-	checksum := fmt.Sprintf("%x", hash.Sum(nil))
+	return fmt.Sprintf("%x", hash.Sum(nil)), nil
-	return checksum, nil
 }
 
 // HmacMd5 return the hmac hash of string use md5.

cryptor/crypto.go

@@ -15,39 +15,40 @@ import (
 	"crypto/rand"
 	"crypto/rsa"
 	"crypto/sha256"
-	"crypto/sha512"
 	"crypto/x509"
 	"encoding/pem"
-	"errors"
 	"io"
 	"os"
-	"strings"
 )
 
 // AesEcbEncrypt encrypt data with key use AES ECB algorithm
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/jT5irszHx-j
 func AesEcbEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
-	length := (len(data) + aes.BlockSize) / aes.BlockSize
+	blockSize := aes.BlockSize
-	plain := make([]byte, length*aes.BlockSize)
+	dataLen := len(data)
+	padding := blockSize - (dataLen % blockSize)
+	paddedLen := dataLen + padding
 
-	copy(plain, data)
+	paddedData := make([]byte, paddedLen)
+	copy(paddedData, data)
 
-	pad := byte(len(plain) - len(data))
+	for i := dataLen; i < paddedLen; i++ {
-	for i := len(data); i < len(plain); i++ {
+		paddedData[i] = byte(padding)
-		plain[i] = pad
 	}
 
-	encrypted := make([]byte, len(plain))
+	cipher, err := aes.NewCipher(generateAesKey(key, len(key)))
-	cipher, _ := aes.NewCipher(generateAesKey(key, size))
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
 
-	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+	encrypted := make([]byte, paddedLen)
-		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
+	for bs := 0; bs < paddedLen; bs += blockSize {
+		cipher.Encrypt(encrypted[bs:], paddedData[bs:])
 	}
 
 	return encrypted
@@ -57,77 +58,107 @@ func AesEcbEncrypt(data, key []byte) []byte {
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/jT5irszHx-j
 func AesEcbDecrypt(encrypted, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
-	cipher, _ := aes.NewCipher(generateAesKey(key, size))
+
+	blockSize := aes.BlockSize
+	if len(encrypted)%blockSize != 0 {
+		panic("aes: encrypted data length is not a multiple of block size")
+	}
+
+	cipher, err := aes.NewCipher(generateAesKey(key, len(key)))
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
+
 	decrypted := make([]byte, len(encrypted))
-
+	for i := 0; i < len(encrypted); i += blockSize {
-	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Decrypt(decrypted[i:], encrypted[i:])
-		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
 	}
 
-	trim := 0
+	if len(decrypted) == 0 {
-	if len(decrypted) > 0 {
+		return nil
-		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
+	}
+	padding := int(decrypted[len(decrypted)-1])
+	if padding == 0 || padding > blockSize {
+		panic("aes: invalid PKCS#7 padding")
+	}
+	for i := len(decrypted) - padding; i < len(decrypted); i++ {
+		if decrypted[i] != byte(padding) {
+			panic("aes: invalid PKCS#7 padding content")
+		}
 	}
 
-	return decrypted[:trim]
+	return decrypted[:len(decrypted)-padding]
 }
 
 // AesCbcEncrypt encrypt data with key use AES CBC algorithm
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/IOq_g8_lKZD
 func AesCbcEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
-	block, _ := aes.NewCipher(key)
+	block, err := aes.NewCipher(key)
-	data = pkcs7Padding(data, block.BlockSize())
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
 
-	encrypted := make([]byte, aes.BlockSize+len(data))
+	padding := aes.BlockSize - len(data)%aes.BlockSize
-	iv := encrypted[:aes.BlockSize]
+	padded := append(data, bytes.Repeat([]byte{byte(padding)}, padding)...)
+
+	iv := make([]byte, aes.BlockSize)
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
+		panic("aes: failed to generate IV: " + err.Error())
 	}
 
+	encrypted := make([]byte, len(padded))
 	mode := cipher.NewCBCEncrypter(block, iv)
-	mode.CryptBlocks(encrypted[aes.BlockSize:], data)
+	mode.CryptBlocks(encrypted, padded)
 
-	return encrypted
+	return append(iv, encrypted...)
 }
 
 // AesCbcDecrypt decrypt data with key use AES CBC algorithm
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/IOq_g8_lKZD
 func AesCbcDecrypt(encrypted, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
-	block, _ := aes.NewCipher(key)
+	if len(encrypted) < aes.BlockSize {
+		panic("aes: ciphertext too short")
+	}
+
+	if len(encrypted)%aes.BlockSize != 0 {
+		panic("aes: ciphertext is not a multiple of the block size")
+	}
 
 	iv := encrypted[:aes.BlockSize]
-	encrypted = encrypted[aes.BlockSize:]
+	ciphertext := encrypted[aes.BlockSize:]
 
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
+
+	decrypted := make([]byte, len(ciphertext))
 	mode := cipher.NewCBCDecrypter(block, iv)
-	mode.CryptBlocks(encrypted, encrypted)
+	mode.CryptBlocks(decrypted, ciphertext)
 
-	decrypted := pkcs7UnPadding(encrypted)
+	return pkcs7UnPadding(decrypted)
-	return decrypted
 }
 
 // AesCtrCrypt encrypt data with key use AES CTR algorithm
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/SpaZO0-5Nsp
+// deprecated: use AesCtrEncrypt and AesCtrDecrypt instead.
 func AesCtrCrypt(data, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
 	block, _ := aes.NewCipher(key)
@@ -141,158 +172,214 @@ func AesCtrCrypt(data, key []byte) []byte {
 	return dst
 }
 
-// AesCfbEncrypt encrypt data with key use AES CFB algorithm
+// AesCtrEncrypt encrypt data with key use AES CTR algorithm
 // len(key) should be 16, 24 or 32.
-// Play: https://go.dev/play/p/tfkF10B13kH
+// Play: https://go.dev/play/p/x6pjPAvThRz
-func AesCfbEncrypt(data, key []byte) []byte {
+func AesCtrEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
 	block, err := aes.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("aes: failed to create cipher: " + err.Error())
 	}
 
-	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := make([]byte, aes.BlockSize)
-	iv := encrypted[:aes.BlockSize]
-
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
+		panic("aes: failed to generate IV: " + err.Error())
 	}
 
-	stream := cipher.NewCFBEncrypter(block, iv)
+	stream := cipher.NewCTR(block, iv)
-	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+	ciphertext := make([]byte, len(data))
+	stream.XORKeyStream(ciphertext, data)
 
-	return encrypted
+	return append(iv, ciphertext...)
+}
+
+// AesCtrDecrypt decrypt data with key use AES CTR algorithm
+// len(key) should be 16, 24 or 32.
+// Play: https://go.dev/play/p/x6pjPAvThRz
+func AesCtrDecrypt(encrypted, key []byte) []byte {
+	if !isAesKeyLengthValid(len(key)) {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
+	}
+	if len(encrypted) < aes.BlockSize {
+		panic("aes: invalid ciphertext length")
+	}
+
+	iv := encrypted[:aes.BlockSize]
+	ciphertext := encrypted[aes.BlockSize:]
+
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
+
+	stream := cipher.NewCTR(block, iv)
+	plaintext := make([]byte, len(ciphertext))
+	stream.XORKeyStream(plaintext, ciphertext)
+
+	return plaintext
+}
+
+// AesCfbEncrypt encrypt data with key use AES CFB algorithm
+// len(key) should be 16, 24 or 32.
+// Play: https://go.dev/play/p/tfkF10B13kH
+func AesCfbEncrypt(data, key []byte) []byte {
+	if !isAesKeyLengthValid(len(key)) {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
+	}
+
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
+
+	iv := make([]byte, aes.BlockSize)
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic("aes: failed to generate IV: " + err.Error())
+	}
+
+	ciphertext := make([]byte, len(data))
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(ciphertext, data)
+
+	return append(iv, ciphertext...)
 }
 
 // AesCfbDecrypt decrypt data with key use AES CFB algorithm
 // len(encrypted) should be great than 16, len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/tfkF10B13kH
 func AesCfbDecrypt(encrypted, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
 	if len(encrypted) < aes.BlockSize {
-		panic("encrypted data is too short")
+		panic("aes: encrypted data too short")
 	}
 
-	block, _ := aes.NewCipher(key)
 	iv := encrypted[:aes.BlockSize]
-	encrypted = encrypted[aes.BlockSize:]
+	ciphertext := encrypted[aes.BlockSize:]
 
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
+	}
+
+	plaintext := make([]byte, len(ciphertext))
 	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(plaintext, ciphertext)
 
-	stream.XORKeyStream(encrypted, encrypted)
+	return plaintext
-
-	return encrypted
 }
 
 // AesOfbEncrypt encrypt data with key use AES OFB algorithm
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/VtHxtkUj-3F
 func AesOfbEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
 	block, err := aes.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("aes: failed to create cipher: " + err.Error())
 	}
 
-	data = pkcs7Padding(data, aes.BlockSize)
+	iv := make([]byte, aes.BlockSize)
-	encrypted := make([]byte, aes.BlockSize+len(data))
-	iv := encrypted[:aes.BlockSize]
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
+		panic("aes: failed to generate IV: " + err.Error())
 	}
 
+	ciphertext := make([]byte, len(data))
 	stream := cipher.NewOFB(block, iv)
-	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+	stream.XORKeyStream(ciphertext, data)
 
-	return encrypted
+	return append(iv, ciphertext...)
 }
 
 // AesOfbDecrypt decrypt data with key use AES OFB algorithm
 // len(key) should be 16, 24 or 32.
 // Play: https://go.dev/play/p/VtHxtkUj-3F
 func AesOfbDecrypt(data, key []byte) []byte {
-	size := len(key)
+	if !isAesKeyLengthValid(len(key)) {
-	if size != 16 && size != 24 && size != 32 {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
-		panic("key length shoud be 16 or 24 or 32")
 	}
 
-	block, err := aes.NewCipher(key)
+	if len(data) < aes.BlockSize {
-	if err != nil {
+		panic("aes: encrypted data too short")
-		panic(err)
 	}
 
 	iv := data[:aes.BlockSize]
-	data = data[aes.BlockSize:]
+	ciphertext := data[aes.BlockSize:]
-	if len(data)%aes.BlockSize != 0 {
+
-		return nil
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic("aes: failed to create cipher: " + err.Error())
 	}
 
-	decrypted := make([]byte, len(data))
+	plaintext := make([]byte, len(ciphertext))
-	mode := cipher.NewOFB(block, iv)
+	stream := cipher.NewOFB(block, iv)
-	mode.XORKeyStream(decrypted, data)
+	stream.XORKeyStream(plaintext, ciphertext)
 
-	decrypted = pkcs7UnPadding(decrypted)
+	return plaintext
-
-	return decrypted
 }
 
 // AesGcmEncrypt encrypt data with key use AES GCM algorithm
 // Play: https://go.dev/play/p/rUt0-DmsPCs
 func AesGcmEncrypt(data, key []byte) []byte {
+	if !isAesKeyLengthValid(len(key)) {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
+	}
+
 	block, err := aes.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("aes: failed to create cipher: " + err.Error())
 	}
 
 	gcm, err := cipher.NewGCM(block)
 	if err != nil {
-		panic(err)
+		panic("aes: failed to create GCM: " + err.Error())
 	}
 
 	nonce := make([]byte, gcm.NonceSize())
-	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
+	if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
-		panic(err)
+		panic("aes: failed to generate nonce: " + err.Error())
 	}
 
-	ciphertext := gcm.Seal(nonce, nonce, data, nil)
+	ciphertext := gcm.Seal(nil, nonce, data, nil)
 
-	return ciphertext
+	return append(nonce, ciphertext...)
 }
 
 // AesGcmDecrypt decrypt data with key use AES GCM algorithm
 // Play: https://go.dev/play/p/rUt0-DmsPCs
 func AesGcmDecrypt(data, key []byte) []byte {
+	if !isAesKeyLengthValid(len(key)) {
+		panic("aes: invalid key length (must be 16, 24, or 32 bytes)")
+	}
+
 	block, err := aes.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("aes: failed to create cipher: " + err.Error())
 	}
 
 	gcm, err := cipher.NewGCM(block)
 	if err != nil {
-		panic(err)
+		panic("aes: failed to create GCM: " + err.Error())
 	}
 
 	nonceSize := gcm.NonceSize()
 	if len(data) < nonceSize {
-		panic("ciphertext too short")
+		panic("aes: ciphertext too short")
 	}
 
 	nonce, ciphertext := data[:nonceSize], data[nonceSize:]
 	plaintext, err := gcm.Open(nil, nonce, ciphertext, nil)
 	if err != nil {
-		panic(err)
+		panic("aes: decryption failed: " + err.Error())
 	}
 
 	return plaintext
@@ -302,20 +389,17 @@ func AesGcmDecrypt(data, key []byte) []byte {
 // len(key) should be 8.
 // Play: https://go.dev/play/p/8qivmPeZy4P
 func DesEcbEncrypt(data, key []byte) []byte {
-	length := (len(data) + des.BlockSize) / des.BlockSize
+	cipher, err := des.NewCipher(generateDesKey(key))
-	plain := make([]byte, length*des.BlockSize)
+	if err != nil {
-	copy(plain, data)
+		panic("des: failed to create cipher: " + err.Error())
-
-	pad := byte(len(plain) - len(data))
-	for i := len(data); i < len(plain); i++ {
-		plain[i] = pad
 	}
 
-	encrypted := make([]byte, len(plain))
+	blockSize := cipher.BlockSize()
-	cipher, _ := des.NewCipher(generateDesKey(key))
+	padded := pkcs5Padding(data, blockSize)
+	encrypted := make([]byte, len(padded))
 
-	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+	for i := 0; i < len(padded); i += blockSize {
-		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
+		cipher.Encrypt(encrypted[i:], padded[i:])
 	}
 
 	return encrypted
@@ -325,42 +409,50 @@ func DesEcbEncrypt(data, key []byte) []byte {
 // len(key) should be 8.
 // Play: https://go.dev/play/p/8qivmPeZy4P
 func DesEcbDecrypt(encrypted, key []byte) []byte {
-	cipher, _ := des.NewCipher(generateDesKey(key))
+	cipher, err := des.NewCipher(generateDesKey(key))
+	if err != nil {
+		panic("des: failed to create cipher: " + err.Error())
+	}
+
+	blockSize := cipher.BlockSize()
+	if len(encrypted)%blockSize != 0 {
+		panic("des: invalid encrypted data length")
+	}
+
 	decrypted := make([]byte, len(encrypted))
-
+	for i := 0; i < len(encrypted); i += blockSize {
-	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Decrypt(decrypted[i:], encrypted[i:])
-		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
 	}
 
-	trim := 0
+	// Remove padding
-	if len(decrypted) > 0 {
+	return pkcs5UnPadding(decrypted)
-		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
-	}
-
-	return decrypted[:trim]
 }
 
 // DesCbcEncrypt encrypt data with key use DES CBC algorithm
 // len(key) should be 8.
 // Play: https://go.dev/play/p/4cC4QvWfe3_1
 func DesCbcEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if len(key) != 8 {
-	if size != 8 {
+		panic("des: key length must be 8 bytes")
-		panic("key length shoud be 8")
 	}
 
-	block, _ := des.NewCipher(key)
+	block, err := des.NewCipher(key)
-	data = pkcs7Padding(data, block.BlockSize())
+	if err != nil {
+		panic("des: failed to create cipher: " + err.Error())
+	}
 
-	encrypted := make([]byte, des.BlockSize+len(data))
+	blockSize := block.BlockSize()
-	iv := encrypted[:des.BlockSize]
+	data = pkcs7Padding(data, blockSize)
+
+	encrypted := make([]byte, blockSize+len(data))
+	iv := encrypted[:blockSize]
 
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
+		panic("des: failed to generate IV: " + err.Error())
 	}
 
 	mode := cipher.NewCBCEncrypter(block, iv)
-	mode.CryptBlocks(encrypted[des.BlockSize:], data)
+	mode.CryptBlocks(encrypted[blockSize:], data)
 
 	return encrypted
 }
@@ -369,26 +461,33 @@ func DesCbcEncrypt(data, key []byte) []byte {
 // len(key) should be 8.
 // Play: https://go.dev/play/p/4cC4QvWfe3_1
 func DesCbcDecrypt(encrypted, key []byte) []byte {
-	size := len(key)
+	if len(key) != 8 {
-	if size != 8 {
+		panic("des: key length must be 8 bytes")
-		panic("key length shoud be 8")
 	}
 
-	block, _ := des.NewCipher(key)
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic("des: failed to create cipher: " + err.Error())
+	}
 
-	iv := encrypted[:des.BlockSize]
+	blockSize := block.BlockSize()
-	encrypted = encrypted[des.BlockSize:]
+	if len(encrypted) < blockSize || len(encrypted)%blockSize != 0 {
+		panic("des: invalid encrypted data length")
+	}
+
+	iv := encrypted[:blockSize]
+	ciphertext := encrypted[blockSize:]
 
 	mode := cipher.NewCBCDecrypter(block, iv)
-	mode.CryptBlocks(encrypted, encrypted)
+	mode.CryptBlocks(ciphertext, ciphertext)
 
-	decrypted := pkcs7UnPadding(encrypted)
+	return pkcs7UnPadding(ciphertext)
-	return decrypted
 }
 
 // DesCtrCrypt encrypt data with key use DES CTR algorithm
 // len(key) should be 8.
 // Play: https://go.dev/play/p/9-T6OjKpcdw
+// deprecated: use DesCtrEncrypt and DesCtrDecrypt instead.
 func DesCtrCrypt(data, key []byte) []byte {
 	size := len(key)
 	if size != 8 {
@@ -406,25 +505,83 @@ func DesCtrCrypt(data, key []byte) []byte {
 	return dst
 }
 
-// DesCfbEncrypt encrypt data with key use DES CFB algorithm
+// DesCtrEncrypt encrypt data with key use DES CTR algorithm
 // len(key) should be 8.
-// Play: https://go.dev/play/p/y-eNxcFBlxL
+// Play: https://go.dev/play/p/S6p_WHCgH1d
-func DesCfbEncrypt(data, key []byte) []byte {
+func DesCtrEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if len(key) != 8 {
-	if size != 8 {
+		panic("des: key length must be 8 bytes")
-		panic("key length shoud be 8")
 	}
 
 	block, err := des.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("des: failed to create cipher: " + err.Error())
+	}
+
+	iv := make([]byte, block.BlockSize())
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic("des: failed to generate IV: " + err.Error())
+	}
+
+	stream := cipher.NewCTR(block, iv)
+
+	encrypted := make([]byte, len(data))
+	stream.XORKeyStream(encrypted, data)
+
+	// 返回前缀包含 IV，便于解密
+	return append(iv, encrypted...)
+}
+
+// DesCtrDecrypt decrypt data with key use DES CTR algorithm
+// len(key) should be 8.
+// Play: https://go.dev/play/p/S6p_WHCgH1d
+func DesCtrDecrypt(encrypted, key []byte) []byte {
+	if len(key) != 8 {
+		panic("des: key length must be 8 bytes")
+	}
+
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic("des: failed to create cipher: " + err.Error())
+	}
+
+	blockSize := block.BlockSize()
+	if len(encrypted) < blockSize {
+		panic("des: ciphertext too short")
+	}
+
+	iv := encrypted[:blockSize]
+	ciphertext := encrypted[blockSize:]
+
+	stream := cipher.NewCTR(block, iv)
+
+	decrypted := make([]byte, len(ciphertext))
+	stream.XORKeyStream(decrypted, ciphertext)
+
+	return decrypted
+}
+
+// DesCfbEncrypt encrypt data with key use DES CFB algorithm
+// len(key) should be 8.
+// Play: https://go.dev/play/p/y-eNxcFBlxL
+func DesCfbEncrypt(data, key []byte) []byte {
+	if len(key) != 8 {
+		panic("des: key length must be 8 bytes")
+	}
+
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic("des: failed to create cipher: " + err.Error())
+	}
+
+	iv := make([]byte, des.BlockSize)
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic("des: failed to generate IV: " + err.Error())
 	}
 
 	encrypted := make([]byte, des.BlockSize+len(data))
-	iv := encrypted[:des.BlockSize]
+
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+	copy(encrypted[:des.BlockSize], iv)
-		panic(err)
-	}
 
 	stream := cipher.NewCFBEncrypter(block, iv)
 	stream.XORKeyStream(encrypted[des.BlockSize:], data)
@@ -436,44 +593,51 @@ func DesCfbEncrypt(data, key []byte) []byte {
 // len(encrypted) should be great than 16, len(key) should be 8.
 // Play: https://go.dev/play/p/y-eNxcFBlxL
 func DesCfbDecrypt(encrypted, key []byte) []byte {
-	size := len(key)
+	if len(key) != 8 {
-	if size != 8 {
+		panic("des: key length must be 8 bytes")
-		panic("key length shoud be 8")
 	}
 
-	block, _ := des.NewCipher(key)
+	block, err := des.NewCipher(key)
-	if len(encrypted) < des.BlockSize {
+	if err != nil {
-		panic("encrypted data is too short")
+		panic("des: failed to create cipher: " + err.Error())
 	}
+
+	if len(encrypted) < des.BlockSize {
+		panic("des: encrypted data too short")
+	}
+
 	iv := encrypted[:des.BlockSize]
-	encrypted = encrypted[des.BlockSize:]
+	ciphertext := encrypted[des.BlockSize:]
 
 	stream := cipher.NewCFBDecrypter(block, iv)
-	stream.XORKeyStream(encrypted, encrypted)
+	stream.XORKeyStream(ciphertext, ciphertext)
 
-	return encrypted
+	return ciphertext
 }
 
 // DesOfbEncrypt encrypt data with key use DES OFB algorithm
 // len(key) should be 8.
 // Play: https://go.dev/play/p/74KmNadjN1J
 func DesOfbEncrypt(data, key []byte) []byte {
-	size := len(key)
+	if len(key) != 8 {
-	if size != 8 {
+		panic("des: key length must be 8 bytes")
-		panic("key length shoud be 8")
 	}
 
 	block, err := des.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("des: failed to create cipher: " + err.Error())
 	}
+
 	data = pkcs7Padding(data, des.BlockSize)
-	encrypted := make([]byte, des.BlockSize+len(data))
+
-	iv := encrypted[:des.BlockSize]
+	iv := make([]byte, des.BlockSize)
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
+		panic("des: failed to generate IV: " + err.Error())
 	}
 
+	encrypted := make([]byte, des.BlockSize+len(data))
+	copy(encrypted[:des.BlockSize], iv)
+
 	stream := cipher.NewOFB(block, iv)
 	stream.XORKeyStream(encrypted[des.BlockSize:], data)
 
@@ -484,25 +648,25 @@ func DesOfbEncrypt(data, key []byte) []byte {
 // len(key) should be 8.
 // Play: https://go.dev/play/p/74KmNadjN1J
 func DesOfbDecrypt(data, key []byte) []byte {
-	size := len(key)
+	if len(key) != 8 {
-	if size != 8 {
+		panic("des: key length must be 8 bytes")
-		panic("key length shoud be 8")
 	}
 
 	block, err := des.NewCipher(key)
 	if err != nil {
-		panic(err)
+		panic("des: failed to create cipher: " + err.Error())
+	}
+
+	if len(data) < des.BlockSize {
+		panic("des: encrypted data too short")
 	}
 
 	iv := data[:des.BlockSize]
-	data = data[des.BlockSize:]
+	ciphertext := data[des.BlockSize:]
-	if len(data)%des.BlockSize != 0 {
-		return nil
-	}
 
-	decrypted := make([]byte, len(data))
+	stream := cipher.NewOFB(block, iv)
-	mode := cipher.NewOFB(block, iv)
+	decrypted := make([]byte, len(ciphertext))
-	mode.XORKeyStream(decrypted, data)
+	stream.XORKeyStream(decrypted, ciphertext)
 
 	decrypted = pkcs7UnPadding(decrypted)
 
@@ -693,117 +857,3 @@ func RsaVerifySign(hash crypto.Hash, data, signature []byte, pubKeyFileName stri
 
 	return rsa.VerifyPKCS1v15(publicKey, hash, hashed, signature)
 }
-
-// loadRsaPrivateKey loads and parses a PEM encoded private key file.
-func loadRsaPublicKey(filename string) (*rsa.PublicKey, error) {
-	pubKeyData, err := os.ReadFile(filename)
-	if err != nil {
-		return nil, err
-	}
-
-	block, _ := pem.Decode(pubKeyData)
-	if block == nil {
-		return nil, errors.New("failed to decode PEM block containing the public key")
-	}
-
-	var pubKey *rsa.PublicKey
-	blockType := strings.ToUpper(block.Type)
-
-	if blockType == "RSA PUBLIC KEY" {
-		pubKey, err = x509.ParsePKCS1PublicKey(block.Bytes)
-		if err != nil {
-			key, err := x509.ParsePKIXPublicKey(block.Bytes)
-			if err != nil {
-				return nil, err
-			}
-
-			var ok bool
-			pubKey, ok = key.(*rsa.PublicKey)
-			if !ok {
-				return nil, errors.New("failed to parse RSA private key")
-			}
-		}
-	} else if blockType == "PUBLIC KEY" {
-		key, err := x509.ParsePKIXPublicKey(block.Bytes)
-		if err != nil {
-			return nil, err
-		}
-
-		var ok bool
-		pubKey, ok = key.(*rsa.PublicKey)
-		if !ok {
-			return nil, errors.New("failed to parse RSA private key")
-		}
-
-	} else {
-		return nil, errors.New("unsupported key type")
-	}
-
-	return pubKey, nil
-}
-
-// loadRsaPrivateKey loads and parses a PEM encoded private key file.
-func loadRasPrivateKey(filename string) (*rsa.PrivateKey, error) {
-	priKeyData, err := os.ReadFile(filename)
-	if err != nil {
-		return nil, err
-	}
-
-	block, _ := pem.Decode(priKeyData)
-	if block == nil {
-		return nil, errors.New("failed to decode PEM block containing the private key")
-	}
-
-	var privateKey *rsa.PrivateKey
-	blockType := strings.ToUpper(block.Type)
-
-	// PKCS#1 format
-	if blockType == "RSA PRIVATE KEY" {
-		privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
-		if err != nil {
-			return nil, err
-		}
-	} else if blockType == "PRIVATE KEY" { // PKCS#8 format
-		priKey, err := x509.ParsePKCS8PrivateKey(block.Bytes)
-		if err != nil {
-			return nil, err
-		}
-		var ok bool
-		privateKey, ok = priKey.(*rsa.PrivateKey)
-		if !ok {
-			return nil, errors.New("failed to parse RSA private key")
-		}
-	} else {
-		return nil, errors.New("unsupported key type")
-	}
-
-	return privateKey, nil
-}
-
-// hashData returns the hash value of the data, using the specified hash function
-func hashData(hash crypto.Hash, data []byte) ([]byte, error) {
-	if !hash.Available() {
-		return nil, errors.New("unsupported hash algorithm")
-	}
-
-	var hashed []byte
-
-	switch hash {
-	case crypto.SHA224:
-		h := sha256.Sum224(data)
-		hashed = h[:]
-	case crypto.SHA256:
-		h := sha256.Sum256(data)
-		hashed = h[:]
-	case crypto.SHA384:
-		h := sha512.Sum384(data)
-		hashed = h[:]
-	case crypto.SHA512:
-		h := sha512.Sum512(data)
-		hashed = h[:]
-	default:
-		return nil, errors.New("unsupported hash algorithm")
-	}
-
-	return hashed, nil
-}

cryptor/crypto_example_test.go

@@ -74,6 +74,32 @@ func ExampleAesCtrCrypt() {
 	// hello
 }
 
+func ExampleAesCtrEncrypt() {
+	data := "hello"
+	key := "abcdefghijklmnop"
+
+	enCrypt := AesCtrEncrypt([]byte(data), []byte(key))
+	deCrypt := AesCtrDecrypt(enCrypt, []byte(key))
+
+	fmt.Println(string(deCrypt))
+
+	// Output:
+	// hello
+}
+
+func ExampleAesCtrDecrypt() {
+	data := "hello"
+	key := "abcdefghijklmnop"
+
+	enCrypt := AesCtrEncrypt([]byte(data), []byte(key))
+	deCrypt := AesCtrDecrypt(enCrypt, []byte(key))
+
+	fmt.Println(string(deCrypt))
+
+	// Output:
+	// hello
+}
+
 func ExampleAesCfbEncrypt() {
 	data := "hello"
 	key := "abcdefghijklmnop"
@@ -227,6 +253,19 @@ func ExampleDesCtrCrypt() {
 	// hello
 }
 
+func ExampleDesCtrDecrypt() {
+	data := "hello"
+	key := "abcdefgh"
+
+	enCrypt := DesCtrEncrypt([]byte(data), []byte(key))
+	deCrypt := DesCtrDecrypt(enCrypt, []byte(key))
+
+	fmt.Println(string(deCrypt))
+
+	// Output:
+	// hello
+}
+
 func ExampleDesCfbEncrypt() {
 	data := "hello"
 	key := "abcdefgh"

cryptor/crypto_internal.go

@@ -1,6 +1,17 @@
 package cryptor
 
-import "bytes"
+import (
+	"bytes"
+	"crypto"
+	"crypto/rsa"
+	"crypto/sha256"
+	"crypto/sha512"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+	"os"
+	"strings"
+)
 
 func generateAesKey(key []byte, size int) []byte {
 	genKey := make([]byte, size)
@@ -35,3 +46,139 @@ func pkcs7UnPadding(src []byte) []byte {
 	unPadding := int(src[length-1])
 	return src[:(length - unPadding)]
 }
+
+func pkcs5Padding(data []byte, blockSize int) []byte {
+	padding := blockSize - len(data)%blockSize
+	padText := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(data, padText...)
+}
+
+func pkcs5UnPadding(data []byte) []byte {
+	length := len(data)
+	if length == 0 {
+		return nil
+	}
+	padLen := int(data[length-1])
+	if padLen == 0 || padLen > length {
+		return nil
+	}
+	return data[:length-padLen]
+}
+
+func isAesKeyLengthValid(n int) bool {
+	return n == 16 || n == 24 || n == 32
+}
+
+// loadRsaPrivateKey loads and parses a PEM encoded private key file.
+func loadRsaPublicKey(filename string) (*rsa.PublicKey, error) {
+	pubKeyData, err := os.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	block, _ := pem.Decode(pubKeyData)
+	if block == nil {
+		return nil, errors.New("failed to decode PEM block containing the public key")
+	}
+
+	var pubKey *rsa.PublicKey
+	blockType := strings.ToUpper(block.Type)
+
+	if blockType == "RSA PUBLIC KEY" {
+		pubKey, err = x509.ParsePKCS1PublicKey(block.Bytes)
+		if err != nil {
+			key, err := x509.ParsePKIXPublicKey(block.Bytes)
+			if err != nil {
+				return nil, err
+			}
+
+			var ok bool
+			pubKey, ok = key.(*rsa.PublicKey)
+			if !ok {
+				return nil, errors.New("failed to parse RSA private key")
+			}
+		}
+	} else if blockType == "PUBLIC KEY" {
+		key, err := x509.ParsePKIXPublicKey(block.Bytes)
+		if err != nil {
+			return nil, err
+		}
+
+		var ok bool
+		pubKey, ok = key.(*rsa.PublicKey)
+		if !ok {
+			return nil, errors.New("failed to parse RSA private key")
+		}
+
+	} else {
+		return nil, errors.New("unsupported key type")
+	}
+
+	return pubKey, nil
+}
+
+// loadRsaPrivateKey loads and parses a PEM encoded private key file.
+func loadRasPrivateKey(filename string) (*rsa.PrivateKey, error) {
+	priKeyData, err := os.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	block, _ := pem.Decode(priKeyData)
+	if block == nil {
+		return nil, errors.New("failed to decode PEM block containing the private key")
+	}
+
+	var privateKey *rsa.PrivateKey
+	blockType := strings.ToUpper(block.Type)
+
+	// PKCS#1 format
+	if blockType == "RSA PRIVATE KEY" {
+		privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
+		if err != nil {
+			return nil, err
+		}
+	} else if blockType == "PRIVATE KEY" { // PKCS#8 format
+		priKey, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+		if err != nil {
+			return nil, err
+		}
+		var ok bool
+		privateKey, ok = priKey.(*rsa.PrivateKey)
+		if !ok {
+			return nil, errors.New("failed to parse RSA private key")
+		}
+	} else {
+		return nil, errors.New("unsupported key type")
+	}
+
+	return privateKey, nil
+}
+
+// hashData returns the hash value of the data, using the specified hash function
+func hashData(hash crypto.Hash, data []byte) ([]byte, error) {
+	if !hash.Available() {
+		return nil, errors.New("unsupported hash algorithm")
+	}
+
+	var hashed []byte
+
+	switch hash {
+	case crypto.SHA224:
+		h := sha256.Sum224(data)
+		hashed = h[:]
+	case crypto.SHA256:
+		h := sha256.Sum256(data)
+		hashed = h[:]
+	case crypto.SHA384:
+		h := sha512.Sum384(data)
+		hashed = h[:]
+	case crypto.SHA512:
+		h := sha512.Sum512(data)
+		hashed = h[:]
+	default:
+		return nil, errors.New("unsupported hash algorithm")
+	}
+
+	return hashed, nil
+}

cryptor/crypto_test.go

@@ -7,7 +7,7 @@ import (
 	"github.com/duke-git/lancet/v2/internal"
 )
 
-func TestAesEcbEncrypt(t *testing.T) {
+func TestAesEcbCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -16,11 +16,11 @@ func TestAesEcbEncrypt(t *testing.T) {
 	aesEcbEncrypt := AesEcbEncrypt([]byte(data), []byte(key))
 	aesEcbDecrypt := AesEcbDecrypt(aesEcbEncrypt, []byte(key))
 
-	assert := internal.NewAssert(t, "TestAesEcbEncrypt")
+	assert := internal.NewAssert(t, "TestAesEcbCrypt")
 	assert.Equal(data, string(aesEcbDecrypt))
 }
 
-func TestAesCbcEncrypt(t *testing.T) {
+func TestAesCbcCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -29,7 +29,7 @@ func TestAesCbcEncrypt(t *testing.T) {
 	aesCbcEncrypt := AesCbcEncrypt([]byte(data), []byte(key))
 	aesCbcDecrypt := AesCbcDecrypt(aesCbcEncrypt, []byte(key))
 
-	assert := internal.NewAssert(t, "TestAesCbcEncrypt")
+	assert := internal.NewAssert(t, "TestAesCbcCrypt")
 	assert.Equal(data, string(aesCbcDecrypt))
 }
 
@@ -39,14 +39,14 @@ func TestAesCtrCrypt(t *testing.T) {
 	data := "hello world"
 	key := "abcdefghijklmnop"
 
-	aesCtrCrypt := AesCtrCrypt([]byte(data), []byte(key))
+	aesCtrCrypt := AesCtrEncrypt([]byte(data), []byte(key))
-	aesCtrDeCrypt := AesCtrCrypt(aesCtrCrypt, []byte(key))
+	aesCtrDeCrypt := AesCtrDecrypt(aesCtrCrypt, []byte(key))
 
 	assert := internal.NewAssert(t, "TestAesCtrCrypt")
 	assert.Equal(data, string(aesCtrDeCrypt))
 }
 
-func TestAesCfbEncrypt(t *testing.T) {
+func TestAesCfbCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -55,11 +55,11 @@ func TestAesCfbEncrypt(t *testing.T) {
 	aesCfbEncrypt := AesCfbEncrypt([]byte(data), []byte(key))
 	aesCfbDecrypt := AesCfbDecrypt(aesCfbEncrypt, []byte(key))
 
-	assert := internal.NewAssert(t, "TestAesCfbEncrypt")
+	assert := internal.NewAssert(t, "TestAesCfbCrypt")
 	assert.Equal(data, string(aesCfbDecrypt))
 }
 
-func TestAesOfbEncrypt(t *testing.T) {
+func TestAesOfbCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -72,7 +72,7 @@ func TestAesOfbEncrypt(t *testing.T) {
 	assert.Equal(data, string(aesOfbDecrypt))
 }
 
-func TestDesEcbEncrypt(t *testing.T) {
+func TestDesEcbCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -85,7 +85,7 @@ func TestDesEcbEncrypt(t *testing.T) {
 	assert.Equal(data, string(desEcbDecrypt))
 }
 
-func TestDesCbcEncrypt(t *testing.T) {
+func TestDesCbcCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -104,14 +104,14 @@ func TestDesCtrCrypt(t *testing.T) {
 	data := "hello world"
 	key := "abcdefgh"
 
-	desCtrCrypt := DesCtrCrypt([]byte(data), []byte(key))
+	desCtrCrypt := DesCtrEncrypt([]byte(data), []byte(key))
-	desCtrDeCrypt := DesCtrCrypt(desCtrCrypt, []byte(key))
+	desCtrDeCrypt := DesCtrDecrypt(desCtrCrypt, []byte(key))
 
 	assert := internal.NewAssert(t, "TestDesCtrCrypt")
 	assert.Equal(data, string(desCtrDeCrypt))
 }
 
-func TestDesCfbEncrypt(t *testing.T) {
+func TestDesCfbCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"
@@ -124,7 +124,7 @@ func TestDesCfbEncrypt(t *testing.T) {
 	assert.Equal(data, string(desCfbDecrypt))
 }
 
-func TestDesOfbEncrypt(t *testing.T) {
+func TestDesOfbCrypt(t *testing.T) {
 	t.Parallel()
 
 	data := "hello world"

cryptor/rsa_private_example.pem

@@ -1,51 +1,51 @@
 -----BEGIN rsa private key-----
-MIIJKQIBAAKCAgEAtXr+2FbR6Prdf9U0gfq2OJbTD82m84bbdeyfsakabYp8Haw6
+MIIJKAIBAAKCAgEAw0anfgtraA2uaZwoLpLBvo1EkfYvDBgeXoMQ4WMKbcw6jU8k
-mZW6ebRNPJvQ87H6DbA55hK1E7y6m+wjvbUopnkGh75Cp04CoQvaU8Rs7MrQcJ2Z
+18E+f3WM52I2RssEk6g0X1vIiarHZU5qyxbv2iNoT7EfgizzlXYvx06pM69GNBQr
-z1VRRgugmqwJMWE/FC5eGXvvpDjF2h2lqThKZTKcvhqfZ3dNX+6v4EQ4BbjSGKdz
+V46+lNhiOv4eeLZcOHBnxAyizlIKyLuwO+C1cX/6BxuXjX3ogw+6IaBFZN/EOMmT
-pyexzR1WSV9IzZYRHMk8jCoEHOx9ItEzoToBf9yAq0DhufylqSRbjKLhR7A3IiRS
+Wc6sPKrnNCEqgCNiTbPAXb+N8j5Iv8QPs0AwVTB3jC9LP0mRt2GGD0cu+QIZkoGE
-LVNfu0Sz5cfNlS7eUA060QS8AV9BgGNTkl75aj8BCOmoHIW85SsSZvdQWYwmlM76
+hyW9Dd+0tgeIK32uXCF8uDjNpUV1TxCdn5H+lvgddxfiaIJAdY5UaTx48XRIdULh
-Jn+tfNNnY7Uuqtz2gI1odcy1nXembXWJryxuYCkSAwpU8UNIQpZeKwBnBxaf0pj3
+QrVKXJNyTYWTXbezViYIf1nXOdDI2hsGgKTfNVCocDT1LcT5zebijFHVCWfAAKEP
-W1m3UzEqhGkkCrKq8LkNSGZSkhT+bI65fNx2LZ7lS165szkeyqS8aikxcBpdx7Z/
+RLdzPZomkFIa3rQQgChgePzE8Oqsaxuwx8sU09NAo3giSq1OmBBwly7h60Lwtm8+
-bqbFFuI42KX+IpXAJCAtvsQ0XXinr83MLcY/I2Ic/5Sgz7txfZsKKwKt48ETS9Bj
+XuwmWtEgZoSQy2Hm8UMAJ3guotfYuS8mPQBi55JZpdqVN0D5SdwuWXhHpO4xDodN
-xGPWo1Dd5YjM8ZJWJv2Rf0mwVjUMClFSNBm8x+aWGVIKjpocN/plpEZmFrWdPcWM
+YAoMMei1NNgrX2zN3FCS8PVi97wD6cQ8xsWM62nByrzIjmPwTfoCb3qP/928FMJM
-4ZH3qGCEnVVkqPvqClahNSQXsM4W7msYts1IUq31tjBSV5bL6l2K8jFJa4PRYdzh
+g7b3bYBrUnOrpVWZfAIDs4H7DoP8VLL4rMgB5PuWNQ13gtX7y5ZOyLhopiKLnar9
-1vHhDOAYTpgDkQbNaoDlDS2o/0TkAGUfXWJtR3D35wRJzoa7bCMt5BuFE3sCAwEA
+XiN8GAMANBdKRI2anGEozrfJoelJ5POXZwSatRjbL+nWO3YnBzEunCw1xmMCAwEA
-AQKCAgEAm/OsGEDTdcBOo9GVo7TM7mg9y7DQLSnQYdALk2JcAZImAmHEocLXUkqs
+AQKCAgBAYYABP3SW5sPVD+XzjPERiPPNh7P1MdJ5aI7dMFEU6Bt50VkdRRn83d2p
-rM7BiwmAdk7gEmQ1E1b1jZQpSpbo7dXG1NOc96TEAZzr61w6tmm7IWtth4wroWPQ
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-g2Hg/V/txAGreF8CggEBAMbGhtowf7TgFvn3T9fmFEBaCIe+m888hkTamiGLUrDh
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-HCTO34vHMo/5Tds3Fy1c/BPvECV3wv/Nln046MuMuLIkIbk3uhVmVEFKGKMlqq6H
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-KRd+PErAf59FQ3Yfkqm7/JnBPgdvgzPmc09SAafHgiogMuu4FFDob+LSENuZl0zA
+qzfvZ/XE+1xs5szTfwr12Of8b9dXxhoW8gKcFPnKOHxvua6SyocmRlnZtaJRFZ7x
-U6Xr9nQphB4IxG15dVSEDKQhlhcTGQy0VBx6sskg6897MuJduDJiNPjQpWmGDuji
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-nZNVhas584qOW0zVmPpilHfTRUgH/Cc7o2HpU5D9S7oiAKI4Mhj8mUY1GvDzygOG
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-/c+4OgCdbod3KIzOiW+zQj9QDm/JvHzzcrfMFE9gh+x3Ud+0CZKNVkSpNLNNrttq
+hGmO89PiubHKXCXNyzjjf66e29paIoDfI0g1J1PikE8H/i4Pjtk9mBCIfp9i6N5a
-smFQ0rX3zhcbl+Gu+2XazfHRnRmkAEF4IeBlz9RW1gv9bvPsGse8CdGTGg8QBCqK
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-Kzz3bAnTmQsV0fhSEKmVGalsCMaerYAoIe7f/2Y3d8IVrPtE2XSjTul37vnx47iT
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-jjxzW+JsCVdm6FvVGgWHMkcdUg5JIUvBj+ifBkIgqReiHr9AtNX5NooxR449B7zK
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-HNsaNqCs2V0gT9vgGaPvakC4ThKQf8vSUF04ECMdFmxJTvlCM3mGbxn/M4bE4OPc
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-ypMb1qh4AhJyt4PMP1Ds8TAjmNRQ9LhoITXcuzlgZIbvOyA6Nz7dz5w3iUoOMyTl
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-SvZ1jMvHGiKHJJD0oYsf1q2YcNvBGT7lvOxJF1LR0AKgfTuqckJOVX4SdiWjgnEI
+k1cVboGtKGYtAemzAh/PyUp716tMz44fnnHPzINUFI3ucybqUwpGiR9s0E3L+GsV
-oEPbjc5sl4Vq+DDNstIQC4/vGbAkeFDozaU+rySXTS2QESyNj9EtbW/uOkLr
+3h7a2v90RdyWcuAPJL0B5FL5NoHhOMYb1rCMu00FyqCKqXCgte2w2psOP60=
 -----END rsa private key-----

cryptor/rsa_public_example.pem

@@ -1,14 +1,14 @@
 -----BEGIN rsa public key-----
-MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAtXr+2FbR6Prdf9U0gfq2
+MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAw0anfgtraA2uaZwoLpLB
-OJbTD82m84bbdeyfsakabYp8Haw6mZW6ebRNPJvQ87H6DbA55hK1E7y6m+wjvbUo
+vo1EkfYvDBgeXoMQ4WMKbcw6jU8k18E+f3WM52I2RssEk6g0X1vIiarHZU5qyxbv
-pnkGh75Cp04CoQvaU8Rs7MrQcJ2Zz1VRRgugmqwJMWE/FC5eGXvvpDjF2h2lqThK
+2iNoT7EfgizzlXYvx06pM69GNBQrV46+lNhiOv4eeLZcOHBnxAyizlIKyLuwO+C1
-ZTKcvhqfZ3dNX+6v4EQ4BbjSGKdzpyexzR1WSV9IzZYRHMk8jCoEHOx9ItEzoToB
+cX/6BxuXjX3ogw+6IaBFZN/EOMmTWc6sPKrnNCEqgCNiTbPAXb+N8j5Iv8QPs0Aw
-f9yAq0DhufylqSRbjKLhR7A3IiRSLVNfu0Sz5cfNlS7eUA060QS8AV9BgGNTkl75
+VTB3jC9LP0mRt2GGD0cu+QIZkoGEhyW9Dd+0tgeIK32uXCF8uDjNpUV1TxCdn5H+
-aj8BCOmoHIW85SsSZvdQWYwmlM76Jn+tfNNnY7Uuqtz2gI1odcy1nXembXWJryxu
+lvgddxfiaIJAdY5UaTx48XRIdULhQrVKXJNyTYWTXbezViYIf1nXOdDI2hsGgKTf
-YCkSAwpU8UNIQpZeKwBnBxaf0pj3W1m3UzEqhGkkCrKq8LkNSGZSkhT+bI65fNx2
+NVCocDT1LcT5zebijFHVCWfAAKEPRLdzPZomkFIa3rQQgChgePzE8Oqsaxuwx8sU
-LZ7lS165szkeyqS8aikxcBpdx7Z/bqbFFuI42KX+IpXAJCAtvsQ0XXinr83MLcY/
+09NAo3giSq1OmBBwly7h60Lwtm8+XuwmWtEgZoSQy2Hm8UMAJ3guotfYuS8mPQBi
-I2Ic/5Sgz7txfZsKKwKt48ETS9BjxGPWo1Dd5YjM8ZJWJv2Rf0mwVjUMClFSNBm8
+55JZpdqVN0D5SdwuWXhHpO4xDodNYAoMMei1NNgrX2zN3FCS8PVi97wD6cQ8xsWM
-x+aWGVIKjpocN/plpEZmFrWdPcWM4ZH3qGCEnVVkqPvqClahNSQXsM4W7msYts1I
+62nByrzIjmPwTfoCb3qP/928FMJMg7b3bYBrUnOrpVWZfAIDs4H7DoP8VLL4rMgB
-Uq31tjBSV5bL6l2K8jFJa4PRYdzh1vHhDOAYTpgDkQbNaoDlDS2o/0TkAGUfXWJt
+5PuWNQ13gtX7y5ZOyLhopiKLnar9XiN8GAMANBdKRI2anGEozrfJoelJ5POXZwSa
-R3D35wRJzoa7bCMt5BuFE3sCAwEAAQ==
+tRjbL+nWO3YnBzEunCw1xmMCAwEAAQ==
 -----END rsa public key-----

datastructure/queue/arrayqueue.go

@@ -60,7 +60,7 @@ func (q *ArrayQueue[T]) Front() T {
 
 // Back return back value of queue
 func (q *ArrayQueue[T]) Back() T {
-	return q.data[q.size-1]
+	return q.data[q.tail-1]
 }
 
 // EnQueue put element into queue

docs/api/overview.md

@@ -6,7 +6,6 @@ outline: deep
 
 <b>lancet（柳叶刀）是一个功能强大、全面、高效、可复用的 go 语言工具函数库。包含 25 个包，超过 600 个工具函数。功能涵盖字符串处理、切片处理、网络、并发、加解密、文件处理、时间/日期、流处理、迭代器等等。</b>
 
-
 <style>
 .package-title {
     color: black;
@@ -27,7 +26,7 @@ outline: deep
     display: inline-block;
     vertical-align: middle;
     line-height: 40px;
-    background: #10b981;
+    background: #6cadf5;
     border: 1px solid;
     margin-right: 10px;
     margin-bottom: 10px;

docs/api/packages/algorithm.md

@@ -8,7 +8,7 @@ algorithm 算法包实现一些基本算法，sort，search，lrucache。
 
 -   [https://github.com/duke-git/lancet/blob/main/algorithm/sort.go](https://github.com/duke-git/lancet/blob/main/algorithm/sort.go)
 -   [https://github.com/duke-git/lancet/blob/main/algorithm/search.go](https://github.com/duke-git/lancet/blob/main/algorithm/search.go)
--   [https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go)
+-   [https://github.com/duke-git/lancet/blob/main/algorithm/lrucache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lrucache.go)
 
 <div STYLE="page-break-after: always;"></div>
 

docs/api/packages/concurrency.md

@@ -7,6 +7,7 @@
 ## 源码:
 
 -   [https://github.com/duke-git/lancet/blob/main/concurrency/channel.go](https://github.com/duke-git/lancet/blob/main/concurrency/channel.go)
+-   [https://github.com/duke-git/lancet/blob/main/concurrency/keyed_locker.go](https://github.com/duke-git/lancet/blob/main/concurrency/keyed_locker.go)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -35,6 +36,17 @@ import (
 -   [Take](#Take)
 -   [Tee](#Tee)
 
+### KeyedLocker
+
+-   [NewKeyedLocker](#NewKeyedLocker)
+-   [KeyedLocker_Do](#Do)
+-   [NewRWKeyedLocker](#NewRWKeyedLocker)
+-   [RLock](#RLock)
+-   [Lock](#Lock)
+-   [NewTryKeyedLocker](#NewTryKeyedLocker)
+-   [TryLock](#TryLock)
+-   [Unlock](#Unlock)
+
 <div STYLE="page-break-after: always;"></div>
 
 ## 文档
@@ -452,3 +464,389 @@ func main() {
     // 1
 }
 ```
+
+### KeyedLocker
+
+### <span id="NewKeyedLocker">NewKeyedLocker</span>
+
+<p>NewKeyedLocker创建一个新的KeyedLocker，并为锁的过期设置指定的 TTL。KeyedLocker 是一个简单的键值锁实现，允许非阻塞的锁获取。</p>
+
+<b>函数签名:</b>
+
+```go
+func NewKeyedLocker[K comparable](ttl time.Duration) *KeyedLocker[K]
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/GzeyC33T5rw)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewKeyedLocker[string](2 * time.Second)
+
+    task := func() {
+        fmt.Println("Executing task...")
+        time.Sleep(1 * time.Second)
+        fmt.Println("Task completed.")
+    }
+
+    ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel()
+
+    if err := locker.Do(ctx, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    ctx2, cancel2 := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel2()
+
+    if err := locker.Do(ctx2, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    // Output:
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+}
+```
+
+### <span id="Do">Do</span>
+
+<p>为指定的键获取锁并执行提供的函数。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *KeyedLocker[K]) Do(ctx context.Context, key K, fn func()) error
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/GzeyC33T5rw)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewKeyedLocker[string](2 * time.Second)
+
+    task := func() {
+        fmt.Println("Executing task...")
+        time.Sleep(1 * time.Second)
+        fmt.Println("Task completed.")
+    }
+
+    ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel()
+
+    if err := locker.Do(ctx, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    ctx2, cancel2 := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel2()
+
+    if err := locker.Do(ctx2, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    // Output:
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+}
+```
+
+### <span id="NewRWKeyedLocker">NewRWKeyedLocker</span>
+
+<p>NewRWKeyedLocker创建一个新的RWKeyedLocker，并为锁的过期设置指定的 TTL。RWKeyedLocker 是一个简单的键值读写锁实现，允许非阻塞的锁获取。</p>
+
+<b>函数签名:</b>
+
+```go
+func NewRWKeyedLocker[K comparable](ttl time.Duration) *RWKeyedLocker[K]
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/CkaJWWwZm9)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewRWKeyedLocker[string](2 * time.Second)
+
+    // Simulate a key
+    key := "resource_key"
+
+    fn := func() {
+        fmt.Println("Starting write operation...")
+        // Simulate write operation, assuming it takes 2 seconds
+        time.Sleep(200 * time.Millisecond)
+        fmt.Println("Write operation completed!")
+    }
+
+    // Acquire the write lock and execute the operation
+    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+    defer cancel()
+
+    // Execute the lock operation with a 3-second timeout
+    err := locker.Lock(ctx, key, fn)
+    if err != nil {
+        return
+    }
+
+    //output:
+    //Starting write operation...
+    //Write operation completed!
+}
+```
+
+### <span id="RLock">RLock</span>
+
+<p>RLock为指定的键获取读锁并执行提供的函数。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *RWKeyedLocker[K]) RLock(ctx context.Context, key K, fn func()) error
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/ZrCr8sMo77T)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewRWKeyedLocker[string](2 * time.Second)
+
+    // Simulate a key
+    key := "resource_key"
+
+    fn := func() {
+        fmt.Println("Starting write operation...")
+        // Simulate write operation, assuming it takes 2 seconds
+        time.Sleep(200 * time.Millisecond)
+        fmt.Println("Write operation completed!")
+    }
+
+    // Acquire the write lock and execute the operation
+    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+    defer cancel()
+
+    // Execute the lock operation with a 3-second timeout
+    err := locker.RLock(ctx, key, fn)
+    if err != nil {
+        return
+    }
+
+    //output:
+    //Starting write operation...
+    //Write operation completed!
+}
+```
+
+### <span id="Lock">Lock</span>
+
+<p>Lock为指定的键获取锁并执行提供的函数。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *RWKeyedLocker[K]) Lock(ctx context.Context, key K, fn func()) error
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/WgAcXbOPKGk)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := NewRWKeyedLocker[string](2 * time.Second)
+
+    // Simulate a key
+    key := "resource_key"
+
+    fn := func() {
+        fmt.Println("Starting write operation...")
+        // Simulate write operation, assuming it takes 2 seconds
+        time.Sleep(200 * time.Millisecond)
+        fmt.Println("Write operation completed!")
+    }
+
+    // Acquire the write lock and execute the operation
+    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+    defer cancel()
+
+    // Execute the lock operation with a 3-second timeout
+    err := locker.Lock(ctx, key, fn)
+    if err != nil {
+        return
+    }
+
+    //output:
+    //Starting write operation...
+    //Write operation completed!
+}
+```
+
+### <span id="NewTryKeyedLocker">NewTryKeyedLocker</span>
+
+<p>创建一个TryKeyedLocker实例，TryKeyedLocker是KeyedLocker的非阻塞版本。</p>
+
+<b>函数签名:</b>
+
+```go
+func NewTryKeyedLocker[K comparable]() *TryKeyedLocker[K]
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/VG9qLvyetE2)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewTryKeyedLocker[string]()
+
+    key := "resource_key"
+
+    if locker.TryLock(key) {
+        fmt.Println("Lock acquired")
+        time.Sleep(1 * time.Second)
+        // Unlock after work is done
+        locker.Unlock(key)
+        fmt.Println("Lock released")
+    } else {
+        fmt.Println("Lock failed")
+    }
+
+    //output:
+    //Lock acquired
+    //Lock released
+}
+```
+
+### <span id="TryLock">TryLock</span>
+
+<p>TryLock尝试获取指定键的锁。如果锁成功获取，则返回true，否则返回false。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *TryKeyedLocker[K]) TryLock(key K) bool
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/VG9qLvyetE2)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewTryKeyedLocker[string]()
+
+    key := "resource_key"
+
+    if locker.TryLock(key) {
+        fmt.Println("Lock acquired")
+        time.Sleep(1 * time.Second)
+        // Unlock after work is done
+        locker.Unlock(key)
+        fmt.Println("Lock released")
+    } else {
+        fmt.Println("Lock failed")
+    }
+
+    //output:
+    //Lock acquired
+    //Lock released
+}
+```
+
+### <span id="Unlock">Unlock</span>
+
+<p>释放指定键的锁。</p>
+
+<b>函数签名:</b>
+
+```go
+func (l *TryKeyedLocker[K]) Unlock(key K)
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/VG9qLvyetE2)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewTryKeyedLocker[string]()
+
+    key := "resource_key"
+
+    if locker.TryLock(key) {
+        fmt.Println("Lock acquired")
+        time.Sleep(1 * time.Second)
+        // Unlock after work is done
+        locker.Unlock(key)
+        fmt.Println("Lock released")
+    } else {
+        fmt.Println("Lock failed")
+    }
+
+    //output:
+    //Lock acquired
+    //Lock released
+}
+```

docs/api/packages/cryptor.md

@@ -27,7 +27,9 @@ import (
 -   [AesEcbDecrypt](#AesEcbDecrypt)
 -   [AesCbcEncrypt](#AesCbcEncrypt)
 -   [AesCbcDecrypt](#AesCbcDecrypt)
--   [AesCtrCrypt](#AesCtrCrypt)
+-   [AesCtrCrypt<sup>deprecated</sup>](#AesCtrCrypt)
+-   [AesCtrEncrypt](#AesCtrEncrypt)
+-   [AesCtrDecrypt](#AesCtrDecrypt)
 -   [AesCfbEncrypt](#AesCfbEncrypt)
 -   [AesCfbDecrypt](#AesCfbDecrypt)
 -   [AesOfbEncrypt](#AesOfbEncrypt)
@@ -40,7 +42,7 @@ import (
 -   [DesEcbDecrypt](#DesEcbDecrypt)
 -   [DesCbcEncrypt](#DesCbcEncrypt)
 -   [DesCbcDecrypt](#DesCbcDecrypt)
--   [DesCtrCrypt](#DesCtrCrypt)
+-   [DesCtrCrypt<sup>deprecated</sup>](#DesCtrCrypt)
 -   [DesCfbEncrypt](#DesCfbEncrypt)
 -   [DesCfbDecrypt](#DesCfbDecrypt)
 -   [DesOfbEncrypt](#DesOfbEncrypt)
@@ -73,7 +75,6 @@ import (
 -   [RsaSign](#RsaSign)
 -   [RsaVerifySign](#RsaVerifySign)
 
-
 <div STYLE="page-break-after: always;"></div>
 
 ## 文档
@@ -218,6 +219,8 @@ func main() {
 
 <p>使用AES CTR算法模式加密/解密数据，参数`key`的长度是16, 24 or 32。</p>
 
+> ⚠️ 本函数已弃用，使用`AesCtrEncrypt`和`AesCtrDecrypt`代替。
+
 <b>函数签名:</b>
 
 ```go
@@ -248,6 +251,74 @@ func main() {
 }
 ```
 
+### <span id="AesCtrEncrypt">AesCtrEncrypt</span>
+
+<p>使用AES CTR算法模式加密数据，参数`key`的长度是16, 24 or 32。</p>
+
+<b>函数签名:</b>
+
+```go
+func AesCtrEncrypt(data, key []byte) []byte
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/x6pjPAvThRz)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefghijklmnop"
+
+    encrypted := cryptor.AesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.AesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="AesCtrDecrypt">AesCtrDecrypt</span>
+
+<p>使用AES CTR算法模式解密数据，参数`key`的长度是16, 24 or 32。</p>
+
+<b>函数签名:</b>
+
+```go
+func AesCtrDecrypt(encrypted, key []byte) []byte
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/x6pjPAvThRz)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefghijklmnop"
+
+    encrypted := cryptor.AesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.AesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
 ### <span id="AesCfbEncrypt">AesCfbEncrypt</span>
 
 <p>使用AES CFB算法模式加密数据，参数`key`的长度是16, 24 or 32。</p>
@@ -648,10 +719,80 @@ func main() {
 }
 ```
 
+### <span id="DesCtrEncrypt">DesCtrEncrypt</span>
+
+<p>使用DES CTR算法模式加密数据，参数`key`的长度是8</p>
+
+<b>函数签名:</b>
+
+```go
+func DesCtrEncrypt(data, key []byte) []byte
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/S6p_WHCgH1d)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefgh"
+
+    encrypted := cryptor.DesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.DesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="DesCtrDecrypt">DesCtrDecrypt</span>
+
+<p>使用DES CTR算法模式加密数据，参数`key`的长度是8</p>
+
+<b>函数签名:</b>
+
+```go
+func DesCtrDecrypt(encrypted, key []byte) []byte
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/S6p_WHCgH1d)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefgh"
+
+    encrypted := cryptor.DesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.DesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
 ### <span id="DesCtrCrypt">DesCtrCrypt</span>
 
 <p>使用DES CTR算法模式加密/解密数据，参数`key`的长度是8</p>
 
+> ⚠️ 本函数已弃用，使用`DesCtrEncrypt`和`DesCtrDecrypt`代替。
+
 <b>函数签名:</b>
 
 ```go

docs/api/packages/datastructure/queue.md

@@ -1092,7 +1092,7 @@ func main() {
 
 
 ### 4. PriorityQueue
-切片实现的额优先级队列。
+切片实现的优先级队列。
 
 ### <span id="NewPriorityQueue">NewPriorityQueue</span>
 <p>返回一个具有特定容量的PriorityQueue指针，参数 `comarator` 用于比较队列中T类型的值。</p>

docs/api/packages/fileutil.md

@@ -427,7 +427,7 @@ func main() {
 func RemoveDir(path string, onDelete ...func(path string)) error
 ```
 
-<b>示例:<span style="float:right;display:inline-block;">[运行](todo)</span></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/Oa6KnPek2uy)</span></b>
 
 ```go
 package main
@@ -1114,6 +1114,7 @@ func main() {
     // 2
 }
 ```
+
 ### <span id="GetExeOrDllVersion">GetExeOrDllVersion</span>
 
 <p>返回exe,dll文件版本号(仅Window平台).</p>

docs/api/packages/maputil.md

@@ -1259,7 +1259,6 @@ func main() {
 }
 ```
 
-
 ### <span id="OrderedMap_Delete">OrderedMap_Delete</span>
 
 <p>删除给定键的键值对。</p>
@@ -2192,7 +2191,6 @@ func main() {
 }
 ```
 
-
 ### <span id="GetOrSet">GetOrSet</span>
 
 <p>返回给定键的值，如果不存在则设置该值。</p>
@@ -2319,7 +2317,7 @@ func main() {
 func FindValuesBy[K comparable, V any](m map[K]V, predicate func(key K, value V) bool) []V
 ```
 
-<b>示例:<span style="float:right;display:inline-block;">[运行](todo)</span></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/bvNwNBZDm6v)</span></b>
 
 ```go
 package main

docs/api/packages/mathutil.md

@@ -466,14 +466,14 @@ func main() {
 }
 ```
 
-### <span id="T运行cRound">T运行cRound</span>
+### <span id="TruncRound">TruncRound</span>
 
 <p>截短n位小数（不进行四舍五入）</p>
 
 <b>函数签名:</b>
 
 ```go
-func T运行cRound[T constraints.Float | constraints.Integer](x T, n int) T 
+func TruncRound[T constraints.Float | constraints.Integer](x T, n int) T 
 ```
 
 <b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/aumarSHIGzP)</span></b>
@@ -487,9 +487,9 @@ import (
 )
 
 func main() {
-    result1 := mathutil.T运行cRound(0.124, 2)
+    result1 := mathutil.TruncRound(0.124, 2)
-    result2 := mathutil.T运行cRound(0.125, 2)
+    result2 := mathutil.TruncRound(0.125, 2)
-    result3 := mathutil.T运行cRound(0.125, 3)
+    result3 := mathutil.TruncRound(0.125, 3)
 
     fmt.Println(result1)
     fmt.Println(result2)

docs/api/packages/netutil.md

@@ -48,7 +48,6 @@ import (
 -   [UploadFile](#UploadFile)
 -   [IsPingConnected](#IsPingConnected)
 -   [IsTelnetConnected](#IsTelnetConnected)
--   [IsTelnetConnected](#IsTelnetConnected)
 -   [BuildUrl](#BuildUrl)
 -   [AddQueryParams](#AddQueryParams)
 
@@ -1045,7 +1044,7 @@ func main() {
 func BuildUrl(scheme, host, path string, query map[string][]string) (string, error)
 ```
 
-<b>示例:<span style="float:right;display:inline-block;">[运行](todo)</span></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/JLXl1hZK7l4)</span></b>
 
 ```go
 package main
@@ -1085,7 +1084,7 @@ func main() {
 func AddQueryParams(urlStr string, params map[string][]string) (string, error)
 ```
 
-<b>示例:<span style="float:right;display:inline-block;">[运行](todo)</span></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/JLXl1hZK7l4)</span></b>
 
 ```go
 package main

docs/api/packages/validator.md

@@ -824,6 +824,43 @@ func main() {
 }
 ```
 
+### <span id="IsAlphaNumeric">IsAlphaNumeric</span>
+
+<p>验证字符串是字母或数字。</p>
+
+<b>函数签名:</b>
+
+```go
+func IsAlphaNumeric(s string) bool
+```
+
+<b>示例:<span style="float:right;display:inline-block">[运行](https://go.dev/play/p/RHeESLrLg9c)</span></b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/validator"
+)
+
+func main() {
+    result1 := validator.IsAlphaNumeric("ABC")
+	result2 := validator.IsAlphaNumeric("123")
+	result3 := validator.IsAlphaNumeric("abc123")
+	result4 := validator.IsAlphaNumeric("abc123@#$")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	// Output:
+	// true
+	// true
+	// true
+	// false
+}
+```
+
 ### <span id="IsJSON">IsJSON</span>
 
 <p>验证字符串是否是有效json。</p>

docs/en/api/overview.md

@@ -6,7 +6,6 @@ outline: deep
 
 <b>Lancet (Lancet) is a powerful, comprehensive, efficient and reusable go language tool function library. Contains 25 packages, more than 600 utility functions. Functions cover string processing, slice processing, network, concurrency, encryption and decryption, file processing, time/date, stream processing, iterators, and more.</b>
 
-
 <style>
 .package-title {
     color: black;
@@ -27,7 +26,7 @@ outline: deep
     display: inline-block;
     vertical-align: middle;
     line-height: 40px;
-    background: #059669;
+    background: #6cadf5;
     border: 1px solid;
     margin-right: 10px;
     margin-bottom: 10px;
@@ -47,6 +46,7 @@ outline: deep
         <div class="package-cell">cryptor</div>
         <div class="package-cell">datastructure</div>
         <div class="package-cell">datetime</div>
+        <div class="package-cell">eventbus</div>
         <div class="package-cell">fileutil</div>
         <div class="package-cell">formatter</div>
         <div class="package-cell">function</div>
@@ -67,4 +67,3 @@ outline: deep
         <div class="package-cell">xerror</div>
     </div>
 </div>
-

docs/en/api/packages/algorithm.md

@@ -8,7 +8,7 @@ Package algorithm implements some basic algorithm. eg. sort, search.
 
 -   [https://github.com/duke-git/lancet/blob/main/algorithm/sort.go](https://github.com/duke-git/lancet/blob/main/algorithm/sort.go)
 -   [https://github.com/duke-git/lancet/blob/main/algorithm/search.go](https://github.com/duke-git/lancet/blob/main/algorithm/search.go)
--   [https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go)
+-   [https://github.com/duke-git/lancet/blob/main/algorithm/lrucache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lrucache.go)
 
 <div STYLE="page-break-after: always;"></div>
 

docs/en/api/packages/concurrency.md

@@ -1,4 +1,5 @@
 # Concurrency
+
 Package concurrency contain some functions to support concurrent programming. eg, goroutine, channel.
 
 <div STYLE="page-break-after: always;"></div>
@@ -6,10 +7,12 @@ Package concurrency contain some functions to support concurrent programming. eg
 ## Source:
 
 -   [https://github.com/duke-git/lancet/blob/main/concurrency/channel.go](https://github.com/duke-git/lancet/blob/main/concurrency/channel.go)
+-   [https://github.com/duke-git/lancet/blob/main/concurrency/keyed_locker.go](https://github.com/duke-git/lancet/blob/main/concurrency/keyed_locker.go)
 
 <div STYLE="page-break-after: always;"></div>
 
 ## Usage:
+
 ```go
 import (
     "github.com/duke-git/lancet/v2/concurrency"
@@ -19,7 +22,9 @@ import (
 <div STYLE="page-break-after: always;"></div>
 
 ## Index
+
 ### Channel
+
 -   [NewChannel](#NewChannel)
 -   [Bridge](#Bridge)
 -   [FanIn](#FanIn)
@@ -31,12 +36,25 @@ import (
 -   [Take](#Take)
 -   [Tee](#Tee)
 
+### KeyedLocker
+
+-   [NewKeyedLocker](#NewKeyedLocker)
+-   [Do](#Do)
+-   [NewRWKeyedLocker](#NewRWKeyedLocker)
+-   [RLock](#RLock)
+-   [Lock](#Lock)
+-   [NewTryKeyedLocker](#NewTryKeyedLocker)
+-   [TryLock](#TryLock)
+-   [Unlock](#Unlock)
+
 <div STYLE="page-break-after: always;"></div>
 
 ## Documentation
 
 ## Channel
+
 ### <span id="NewChannel">NewChannel</span>
+
 <p>Create a Channel pointer instance.</p>
 
 <b>Signature:</b>
@@ -45,6 +63,7 @@ import (
 type Channel[T any] struct
 func NewChannel[T any]() *Channel[T]
 ```
+
 <b>Example: <span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/7aB4KyMMp9A)</span></b>
 
 ```go
@@ -69,6 +88,7 @@ func main() {
 ```go
 func (c *Channel[T]) Bridge(ctx context.Context, chanStream <-chan <-chan T) <-chan T
 ```
+
 <b>Example: <span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/qmWSy1NVF-Y)</span></b>
 
 ```go
@@ -121,6 +141,7 @@ func main() {
 ```go
 func (c *Channel[T]) FanIn(ctx context.Context, channels ...<-chan T) <-chan T
 ```
+
 <b>Example: <span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/2VYFMexEvTm)</span></b>
 
 ```go
@@ -160,6 +181,7 @@ func main() {
 ```go
 func (c *Channel[T]) Repeat(ctx context.Context, values ...T) <-chan T
 ```
+
 <b>Example:</b>
 
 ```go
@@ -199,6 +221,7 @@ func main() {
 ```go
 func (c *Channel[T]) Generate(ctx context.Context, values ...T) <-chan T
 ```
+
 <b>Example: <span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/7aB4KyMMp9A)</span></b>
 
 ```go
@@ -237,6 +260,7 @@ func main() {
 ```go
 func (c *Channel[T]) RepeatFn(ctx context.Context, fn func() T) <-chan T
 ```
+
 <b>Example:</b>
 
 ```go
@@ -279,6 +303,7 @@ func main() {
 ```go
 func (c *Channel[T]) Or(channels ...<-chan T) <-chan T
 ```
+
 <b>Example:</b>
 
 ```go
@@ -322,6 +347,7 @@ func main() {
 ```go
 func (c *Channel[T]) OrDone(ctx context.Context, channel <-chan T) <-chan T
 ```
+
 <b>Example:</b>
 
 ```go
@@ -360,6 +386,7 @@ func main() {
 ```go
 func (c *Channel[T]) Take(ctx context.Context, valueStream <-chan T, number int) <-chan T
 ```
+
 <b>Example:</b>
 
 ```go
@@ -406,6 +433,7 @@ func main() {
 ```go
 func (c *Channel[T]) Tee(ctx context.Context, in <-chan T) (<-chan T, <-chan T)
 ```
+
 <b>Example:</b>
 
 ```go
@@ -438,3 +466,389 @@ func main() {
     // 1
 }
 ```
+
+### KeyedLocker
+
+### <span id="NewKeyedLocker">NewKeyedLocker</span>
+
+<p>KeyedLocker is a simple implementation of a keyed locker that allows for non-blocking lock acquisition.</p>
+
+<b>Signature:</b>
+
+```go
+func NewKeyedLocker[K comparable](ttl time.Duration) *KeyedLocker[K]
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/GzeyC33T5rw)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewKeyedLocker[string](2 * time.Second)
+
+    task := func() {
+        fmt.Println("Executing task...")
+        time.Sleep(1 * time.Second)
+        fmt.Println("Task completed.")
+    }
+
+    ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel()
+
+    if err := locker.Do(ctx, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    ctx2, cancel2 := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel2()
+
+    if err := locker.Do(ctx2, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    // Output:
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+}
+```
+
+### <span id="Do">Do</span>
+
+<p>Acquires a lock for the specified key and executes the provided function.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *KeyedLocker[K]) Do(ctx context.Context, key K, fn func()) error
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/GzeyC33T5rw)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewKeyedLocker[string](2 * time.Second)
+
+    task := func() {
+        fmt.Println("Executing task...")
+        time.Sleep(1 * time.Second)
+        fmt.Println("Task completed.")
+    }
+
+    ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel()
+
+    if err := locker.Do(ctx, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    ctx2, cancel2 := context.WithTimeout(context.Background(), 3*time.Second)
+    defer cancel2()
+
+    if err := locker.Do(ctx2, "mykey", task); err != nil {
+        log.Fatalf("Error executing task: %v\n", err)
+    } else {
+        fmt.Println("Task successfully executed.")
+    }
+
+    // Output:
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+    // Executing task...
+    // Task completed.
+    // Task successfully executed.
+}
+```
+
+### <span id="NewRWKeyedLocker">NewRWKeyedLocker</span>
+
+<p>RWKeyedLocker is a read-write version of KeyedLocker.</p>
+
+<b>Signature:</b>
+
+```go
+func NewRWKeyedLocker[K comparable](ttl time.Duration) *RWKeyedLocker[K]
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/ZrCr8sMo77T)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewRWKeyedLocker[string](2 * time.Second)
+
+    // Simulate a key
+    key := "resource_key"
+
+    fn := func() {
+        fmt.Println("Starting write operation...")
+        // Simulate write operation, assuming it takes 2 seconds
+        time.Sleep(200 * time.Millisecond)
+        fmt.Println("Write operation completed!")
+    }
+
+    // Acquire the write lock and execute the operation
+    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+    defer cancel()
+
+    // Execute the lock operation with a 3-second timeout
+    err := locker.Lock(ctx, key, fn)
+    if err != nil {
+        return
+    }
+
+    //output:
+    //Starting write operation...
+    //Write operation completed!
+}
+```
+
+### <span id="RLock">RLock</span>
+
+<p>Acquires a read lock for the specified key and executes the provided function.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *RWKeyedLocker[K]) RLock(ctx context.Context, key K, fn func()) error
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/ZrCr8sMo77T)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewRWKeyedLocker[string](2 * time.Second)
+
+    // Simulate a key
+    key := "resource_key"
+
+    fn := func() {
+        fmt.Println("Starting write operation...")
+        // Simulate write operation, assuming it takes 2 seconds
+        time.Sleep(200 * time.Millisecond)
+        fmt.Println("Write operation completed!")
+    }
+
+    // Acquire the write lock and execute the operation
+    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+    defer cancel()
+
+    // Execute the lock operation with a 3-second timeout
+    err := locker.RLock(ctx, key, fn)
+    if err != nil {
+        return
+    }
+
+    //output:
+    //Starting write operation...
+    //Write operation completed!
+}
+```
+
+### <span id="Lock">Lock</span>
+
+<p>Acquires a write lock for the specified key and executes the provided function.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *RWKeyedLocker[K]) Lock(ctx context.Context, key K, fn func()) error
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/WgAcXbOPKGk)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := NewRWKeyedLocker[string](2 * time.Second)
+
+    // Simulate a key
+    key := "resource_key"
+
+    fn := func() {
+        fmt.Println("Starting write operation...")
+        // Simulate write operation, assuming it takes 2 seconds
+        time.Sleep(200 * time.Millisecond)
+        fmt.Println("Write operation completed!")
+    }
+
+    // Acquire the write lock and execute the operation
+    ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+    defer cancel()
+
+    // Execute the lock operation with a 3-second timeout
+    err := locker.Lock(ctx, key, fn)
+    if err != nil {
+        return
+    }
+
+    //output:
+    //Starting write operation...
+    //Write operation completed!
+}
+```
+
+### <span id="NewTryKeyedLocker">NewTryKeyedLocker</span>
+
+<p>TryKeyedLocker is a non-blocking version of KeyedLocker.</p>
+
+<b>Signature:</b>
+
+```go
+func NewTryKeyedLocker[K comparable]() *TryKeyedLocker[K]
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/VG9qLvyetE2)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewTryKeyedLocker[string]()
+
+    key := "resource_key"
+
+    if locker.TryLock(key) {
+        fmt.Println("Lock acquired")
+        time.Sleep(1 * time.Second)
+        // Unlock after work is done
+        locker.Unlock(key)
+        fmt.Println("Lock released")
+    } else {
+        fmt.Println("Lock failed")
+    }
+
+    //output:
+    //Lock acquired
+    //Lock released
+}
+```
+
+### <span id="TryLock">TryLock</span>
+
+<p>TryLock tries to acquire a lock for the specified key.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *TryKeyedLocker[K]) TryLock(key K) bool
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/VG9qLvyetE2)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewTryKeyedLocker[string]()
+
+    key := "resource_key"
+
+    if locker.TryLock(key) {
+        fmt.Println("Lock acquired")
+        time.Sleep(1 * time.Second)
+        // Unlock after work is done
+        locker.Unlock(key)
+        fmt.Println("Lock released")
+    } else {
+        fmt.Println("Lock failed")
+    }
+
+    //output:
+    //Lock acquired
+    //Lock released
+}
+```
+
+### <span id="Unlock">Unlock</span>
+
+<p>Unlock releases the lock for the specified key.</p>
+
+<b>Signature:</b>
+
+```go
+func (l *TryKeyedLocker[K]) Unlock(key K)
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/VG9qLvyetE2)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/concurrency"
+)
+
+func main() {
+    locker := concurrency.NewTryKeyedLocker[string]()
+
+    key := "resource_key"
+
+    if locker.TryLock(key) {
+        fmt.Println("Lock acquired")
+        time.Sleep(1 * time.Second)
+        // Unlock after work is done
+        locker.Unlock(key)
+        fmt.Println("Lock released")
+    } else {
+        fmt.Println("Lock failed")
+    }
+
+    //output:
+    //Lock acquired
+    //Lock released
+}
+```

docs/en/api/packages/cryptor.md

@@ -27,7 +27,9 @@ import (
 -   [AesEcbDecrypt](#AesEcbDecrypt)
 -   [AesCbcEncrypt](#AesCbcEncrypt)
 -   [AesCbcDecrypt](#AesCbcDecrypt)
--   [AesCtrCrypt](#AesCtrCrypt)
+-   [AesCtrCrypt<sup>deprecated</sup>](#AesCtrCrypt)
+-   [AesCtrEncrypt](#AesCtrEncrypt)
+-   [AesCtrDecrypt](#AesCtrDecrypt)
 -   [AesCfbEncrypt](#AesCfbEncrypt)
 -   [AesCfbDecrypt](#AesCfbDecrypt)
 -   [AesOfbEncrypt](#AesOfbEncrypt)
@@ -40,7 +42,9 @@ import (
 -   [DesEcbDecrypt](#DesEcbDecrypt)
 -   [DesCbcEncrypt](#DesCbcEncrypt)
 -   [DesCbcDecrypt](#DesCbcDecrypt)
--   [DesCtrCrypt](#DesCtrCrypt)
+-   [DesCtrCrypt<sup>deprecated</sup>](#DesCtrCrypt)
+-   [DesCfbEncrypt](#DesCfbEncrypt)
+-   [DesCfbDecrypt](#DesCfbDecrypt)
 -   [DesCfbEncrypt](#DesCfbEncrypt)
 -   [DesCfbDecrypt](#DesCfbDecrypt)
 -   [DesOfbEncrypt](#DesOfbEncrypt)
@@ -217,6 +221,8 @@ func main() {
 
 <p>Encrypt or decrypt data with key use AES CTR algorithm. Length of `key` param should be 16, 24 or 32.</p>
 
+> ⚠️ This function is deprecated. use `AesCtrEncrypt` and `AesCtrDecrypt` instead.
+
 <b>Signature:</b>
 
 ```go
@@ -247,6 +253,74 @@ func main() {
 }
 ```
 
+### <span id="AesCtrEncrypt">AesCtrEncrypt</span>
+
+<p>Encrypt data with key use AES CTR algorithm</p>
+
+<b>Signature:</b>
+
+```go
+func AesCtrEncrypt(data, key []byte) []byte
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/x6pjPAvThRz)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefghijklmnop"
+
+    encrypted := cryptor.AesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.AesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="AesCtrDecrypt">AesCtrDecrypt</span>
+
+<p>Decrypt data with key use AES CTR algorithm</p>
+
+<b>Signature:</b>
+
+```go
+func AesCtrDecrypt(encrypted, key []byte) []byte
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/x6pjPAvThRz)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefghijklmnop"
+
+    encrypted := cryptor.AesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.AesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
 ### <span id="AesCfbEncrypt">AesCfbEncrypt</span>
 
 <p>Encrypt data with key use AES CFB algorithm. Length of `key` param should be 16, 24 or 32.</p>
@@ -651,6 +725,8 @@ func main() {
 
 <p>Encrypt or decrypt data with key use DES CTR algorithm. Length of `key` param should be 8.</p>
 
+> ⚠️ This function is deprecated. use `DesCtrEncrypt` and `DesCtrDecrypt` instead.
+
 <b>Signature:</b>
 
 ```go
@@ -681,6 +757,74 @@ func main() {
 }
 ```
 
+### <span id="DesCtrEncrypt">DesCtrCrypt</span>
+
+<p>Encrypt data with key use DES CTR algorithm. Length of `key` param should be 8.</p>
+
+<b>Signature:</b>
+
+```go
+func DesCtrEncrypt(data, key []byte) []byte
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/S6p_WHCgH1d)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefgh"
+
+    encrypted := cryptor.DesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.DesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="DesCtrDecrypt">DesCtrDecrypt</span>
+
+<p>Decrypt data with key use DES CTR algorithm. Length of `key` param should be 8.</p>
+
+<b>Signature:</b>
+
+```go
+func DesCtrDecrypt(encrypted, key []byte) []byte
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/S6p_WHCgH1d)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/cryptor"
+)
+
+func main() {
+    data := "hello"
+    key := "abcdefgh"
+
+    encrypted := cryptor.DesCtrEncrypt([]byte(data), []byte(key))
+    decrypted := cryptor.DesCtrDecrypt(encrypted, []byte(key))
+
+    fmt.Println(string(decrypted))
+
+    // Output:
+    // hello
+}
+```
+
 ### <span id="DesCfbEncrypt">DesCfbEncrypt</span>
 
 <p>Encrypt data with key use DES CFB algorithm. Length of `key` param should be 8.</p>

docs/en/api/packages/fileutil.md

@@ -427,7 +427,7 @@ func main() {
 func RemoveDir(path string, onDelete ...func(path string)) error
 ```
 
-<b>Example:<span style="float:right;display:inline-block;">[Run](todo)</span></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/Oa6KnPek2uy)</span></b>
 
 ```go
 package main

docs/en/api/packages/maputil.md

@@ -10,7 +10,6 @@ Package maputil includes some functions to manipulate map.
 -   [https://github.com/duke-git/lancet/blob/main/maputil/concurrentmap.go](https://github.com/duke-git/lancet/blob/main/maputil/concurrentmap.go)
 -   [https://github.com/duke-git/lancet/blob/main/maputil/orderedmap.go](https://github.com/duke-git/lancet/blob/main/maputil/orderedmap.go)
 
-
 <div STYLE="page-break-after: always;"></div>
 
 ## Example:
@@ -1275,7 +1274,6 @@ func main() {
 }
 ```
 
-
 ### <span id="OrderedMap_Delete">OrderedMap_Delete</span>
 
 <p>Deletes the key-value pair for the given key.</p>
@@ -2337,7 +2335,7 @@ func main() {
 func FindValuesBy[K comparable, V any](m map[K]V, predicate func(key K, value V) bool) []V
 ```
 
-<b>Example:<span style="float:right;display:inline-block;">[Run](todo)</span></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/bvNwNBZDm6v)</span></b>
 
 ```go
 package main

docs/en/api/packages/netutil.md

@@ -51,7 +51,6 @@ import (
 -   [BuildUrl](#BuildUrl)
 -   [AddQueryParams](#AddQueryParams)
 
-
 <div STYLE="page-break-after: always;"></div>
 
 <link rel="stylesheet" type="text/css" href="/styles/api_doc.css">
@@ -1045,7 +1044,7 @@ func main() {
 func BuildUrl(scheme, host, path string, query map[string][]string) (string, error)
 ```
 
-<b>Example:<span style="float:right;display:inline-block;">[Run](todo)</span></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/JLXl1hZK7l4)</span></b>
 
 ```go
 package main
@@ -1085,7 +1084,7 @@ func main() {
 func AddQueryParams(urlStr string, params map[string][]string) (string, error)
 ```
 
-<b>Example:<span style="float:right;display:inline-block;">[Run](todo)</span></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/JLXl1hZK7l4)</span></b>
 
 ```go
 package main

docs/en/api/packages/validator.md

@@ -826,6 +826,43 @@ func main() {
 }
 ```
 
+### <span id="IsAlphaNumeric">IsAlphaNumeric</span>
+
+<p>Check if the string is alphanumeric.</p>
+
+<b>Signature:</b>
+
+```go
+func IsAlphaNumeric(s string) bool
+```
+
+<b>Example:<span style="float:right;display:inline-block">[Run](https://go.dev/play/p/RHeESLrLg9c)</span></b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/validator"
+)
+
+func main() {
+    result1 := validator.IsAlphaNumeric("ABC")
+	result2 := validator.IsAlphaNumeric("123")
+	result3 := validator.IsAlphaNumeric("abc123")
+	result4 := validator.IsAlphaNumeric("abc123@#$")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	// Output:
+	// true
+	// true
+	// true
+	// false
+}
+```
+
 ### <span id="IsJSON">IsJSON</span>
 
 <p>Check if the string is valid JSON.</p>

fileutil/file.go

@@ -190,7 +190,7 @@ func RemoveFile(path string, onDelete ...func(path string)) error {
 }
 
 // RemoveDir remove the path directory.
-// Play: todo
+// Play: https://go.dev/play/p/Oa6KnPek2uy
 func RemoveDir(path string, onDelete ...func(path string)) error {
 	info, err := os.Stat(path)
 	if err != nil {

maputil/map.go

@@ -668,7 +668,7 @@ func GetOrDefault[K comparable, V any](m map[K]V, key K, defaultValue V) V {
 }
 
 // FindValuesBy returns a slice of values from the map that satisfy the given predicate function.
-// Play: todo
+// Play: https://go.dev/play/p/bvNwNBZDm6v
 func FindValuesBy[K comparable, V any](m map[K]V, predicate func(key K, value V) bool) []V {
 	result := make([]V, 0)
 

maputil/map_example_test.go

@@ -842,6 +842,10 @@ func ExampleFindValuesBy() {
 		return k%2 == 0
 	})
 
+	// github action will excute this test currently, so sort the result
+	// to make it deterministic
+	sort.Strings(result)
+
 	fmt.Println(result)
 
 	// Output:

netutil/net.go

@@ -309,7 +309,7 @@ func IsTelnetConnected(host string, port string) bool {
 }
 
 // BuildUrl builds a URL from the given params.
-// Play: todo
+// Play: https://go.dev/play/p/JLXl1hZK7l4
 func BuildUrl(scheme, host, path string, query map[string][]string) (string, error) {
 	if err := validateScheme(scheme); err != nil {
 		return "", err
@@ -365,13 +365,13 @@ func validateScheme(scheme string) error {
 	return nil
 }
 
-var hostRegex = regexp.MustCompile(`^([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])(\.[a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])*$`)
+var hostRegex = regexp.MustCompile(`^([a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]?)(\.[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]?)+$`)
 var pathRegex = regexp.MustCompile(`^\/([a-zA-Z0-9%_-]+(?:\/[a-zA-Z0-9%_-]+)*)$`)
 
 var alphaNumericRegex = regexp.MustCompile(`^[a-zA-Z0-9]+$`)
 
 // AddQueryParams adds query parameters to the given URL.
-// Play: todoå
+// Play: https://go.dev/play/p/JLXl1hZK7l4
 func AddQueryParams(urlStr string, params map[string][]string) (string, error) {
 	parsedUrl, err := url.Parse(urlStr)
 	if err != nil {

netutil/net_test.go

@@ -196,6 +196,14 @@ func TestBuildUrl(t *testing.T) {
 			want:    "https://www.test.com/path%20with%20spaces",
 			wantErr: false,
 		},
+		{
+			scheme:  "https",
+			host:    "my.api.edu.cn",
+			path:    "/api",
+			query:   nil,
+			want:    "https://my.api.edu.cn/api",
+			wantErr: false,
+		},
 	}
 
 	for _, tt := range tests {

retry/retry.go

@@ -128,16 +128,19 @@ func Retry(retryFunc RetryFunc, opts ...Option) error {
 	}
 
 	var i uint
+	var lastErr error
 	for i < config.retryTimes {
-		err := retryFunc()
+		lastErr = retryFunc()
-		if err != nil {
+		if lastErr == nil {
+			return nil
+		}
+
+		if i < config.retryTimes-1 { // Only wait if it's not the last retry
 			select {
 			case <-time.After(config.backoffStrategy.CalculateInterval()):
 			case <-config.context.Done():
 				return errors.New("retry is cancelled")
 			}
-		} else {
-			return nil
 		}
 		i++
 	}
@@ -146,7 +149,7 @@ func Retry(retryFunc RetryFunc, opts ...Option) error {
 	lastSlash := strings.LastIndex(funcPath, "/")
 	funcName := funcPath[lastSlash+1:]
 
-	return fmt.Errorf("function %s run failed after %d times retry", funcName, i)
+	return fmt.Errorf("function %s run failed after %d times retry, last error: %w", funcName, i, lastErr)
 }
 
 // BackoffStrategy is an interface that defines a method for calculating backoff intervals.

retry/retry_example_test.go

@@ -118,7 +118,7 @@ func ExampleRetryTimes() {
 	}
 
 	// Output:
-	// function retry.ExampleRetryTimes.func1 run failed after 2 times retry
+	// function retry.ExampleRetryTimes.func1 run failed after 2 times retry, last error: error occurs
 }
 
 func ExampleRetry() {

retry/retry_test.go

@@ -15,14 +15,16 @@ func TestRetryFailed(t *testing.T) {
 	assert := internal.NewAssert(t, "TestRetryFailed")
 
 	var number int
+	customError := errors.New("error occurs")
 	increaseNumber := func() error {
 		number++
-		return errors.New("error occurs")
+		return customError
 	}
 
 	err := Retry(increaseNumber, RetryWithLinearBackoff(time.Microsecond*50))
 
 	assert.IsNotNil(err)
+	assert.Equal(errors.Is(err, customError), true)
 	assert.Equal(DefaultRetryTimes, number)
 }
 

slice/slice.go

@@ -59,16 +59,18 @@ func ContainSubSlice[T comparable](slice, subSlice []T) bool {
 		return false
 	}
 
-	elementMap := make(map[T]struct{}, len(slice))
+	elementCount := make(map[T]int, len(slice))
 	for _, item := range slice {
-		elementMap[item] = struct{}{}
+		elementCount[item]++
 	}
 
 	for _, item := range subSlice {
-		if _, ok := elementMap[item]; !ok {
+		if elementCount[item] == 0 {
 			return false
 		}
+		elementCount[item]--
 	}
+
 	return true
 }
 
@@ -81,14 +83,18 @@ func Chunk[T any](slice []T, size int) [][]T {
 		return result
 	}
 
+	currentChunk := []T{}
+
 	for _, item := range slice {
-		l := len(result)
+		if len(currentChunk) == size {
-		if l == 0 || len(result[l-1]) == size {
+			result = append(result, currentChunk)
-			result = append(result, []T{})
+			currentChunk = []T{}
-			l++
+		}
+		currentChunk = append(currentChunk, item)
 	}
 
-		result[l-1] = append(result[l-1], item)
+	if len(currentChunk) > 0 {
+		result = append(result, currentChunk)
 	}
 
 	return result
@@ -106,6 +112,7 @@ func Compact[T comparable](slice []T) []T {
 			result = append(result, v)
 		}
 	}
+
 	return result[:len(result):len(result)]
 }
 
@@ -133,8 +140,17 @@ func Concat[T any](slices ...[]T) []T {
 func Difference[T comparable](slice, comparedSlice []T) []T {
 	result := []T{}
 
+	if len(slice) == 0 {
+		return result
+	}
+
+	comparedMap := make(map[T]struct{}, len(comparedSlice))
+	for _, v := range comparedSlice {
+		comparedMap[v] = struct{}{}
+	}
+
 	for _, v := range slice {
-		if !Contain(comparedSlice, v) {
+		if _, found := comparedMap[v]; !found {
 			result = append(result, v)
 		}
 	}
@@ -147,13 +163,17 @@ func Difference[T comparable](slice, comparedSlice []T) []T {
 // like lodash.js differenceBy: https://lodash.com/docs/4.17.15#differenceBy.
 // Play: https://go.dev/play/p/DiivgwM5OnC
 func DifferenceBy[T comparable](slice []T, comparedSlice []T, iteratee func(index int, item T) T) []T {
-	orginSliceAfterMap := Map(slice, iteratee)
-	comparedSliceAfterMap := Map(comparedSlice, iteratee)
-
 	result := make([]T, 0)
-	for i, v := range orginSliceAfterMap {
+
-		if !Contain(comparedSliceAfterMap, v) {
+	comparedMap := make(map[T]struct{}, len(comparedSlice))
-			result = append(result, slice[i])
+	for _, item := range comparedSlice {
+		comparedMap[iteratee(0, item)] = struct{}{}
+	}
+
+	for i, item := range slice {
+		transformedItem := iteratee(i, item)
+		if _, found := comparedMap[transformedItem]; !found {
+			result = append(result, item)
 		}
 	}
 
@@ -165,23 +185,32 @@ func DifferenceBy[T comparable](slice []T, comparedSlice []T, iteratee func(inde
 // The comparator is invoked with two arguments: (arrVal, othVal).
 // Play: https://go.dev/play/p/v2U2deugKuV
 func DifferenceWith[T any](slice []T, comparedSlice []T, comparator func(item1, item2 T) bool) []T {
-	result := make([]T, 0)
-
 	getIndex := func(arr []T, item T, comparison func(v1, v2 T) bool) int {
-		index := -1
 		for i, v := range arr {
 			if comparison(item, v) {
-				index = i
+				return i
+			}
+		}
+		return -1
+	}
+
+	result := make([]T, 0, len(slice))
+
+	comparedMap := make(map[int]T, len(comparedSlice))
+	for _, v := range comparedSlice {
+		comparedMap[getIndex(comparedSlice, v, comparator)] = v
+	}
+
+	for _, v := range slice {
+		found := false
+		for _, existing := range comparedSlice {
+			if comparator(v, existing) {
+				found = true
 				break
 			}
 		}
-		return index
+		if !found {
-	}
+			result = append(result, v)
-
-	for i, v := range slice {
-		index := getIndex(comparedSlice, v, comparator)
-		if index == -1 {
-			result = append(result, slice[i])
 		}
 	}
 
@@ -423,19 +452,20 @@ func FindLastBy[T any](slice []T, predicate func(index int, item T) bool) (v T,
 // Flatten flattens slice with one level.
 // Play: https://go.dev/play/p/hYa3cBEevtm
 func Flatten(slice any) any {
-	sv := sliceValue(slice)
+	sv := reflect.ValueOf(slice)
-
+	if sv.Kind() != reflect.Slice {
-	var result reflect.Value
+		panic("Flatten: input must be a slice")
-	if sv.Type().Elem().Kind() == reflect.Interface {
-		result = reflect.MakeSlice(reflect.TypeOf([]interface{}{}), 0, sv.Len())
-	} else if sv.Type().Elem().Kind() == reflect.Slice {
-		result = reflect.MakeSlice(sv.Type().Elem(), 0, sv.Len())
-	} else {
-		return result
 	}
 
+	elemType := sv.Type().Elem()
+	if elemType.Kind() == reflect.Slice {
+		elemType = elemType.Elem()
+	}
+
+	result := reflect.MakeSlice(reflect.SliceOf(elemType), 0, sv.Len())
+
 	for i := 0; i < sv.Len(); i++ {
-		item := reflect.ValueOf(sv.Index(i).Interface())
+		item := sv.Index(i)
 		if item.Kind() == reflect.Slice {
 			for j := 0; j < item.Len(); j++ {
 				result = reflect.Append(result, item.Index(j))
@@ -607,7 +637,7 @@ func Repeat[T any](item T, n int) []T {
 }
 
 // InterfaceSlice convert param to slice of interface.
-// This function is deprecated, use generics feature of go1.18+ for replacement.
+// deprecated: use generics feature of go1.18+ for replacement.
 // Play: https://go.dev/play/p/FdQXF0Vvqs-
 func InterfaceSlice(slice any) []any {
 	sv := sliceValue(slice)
@@ -624,7 +654,7 @@ func InterfaceSlice(slice any) []any {
 }
 
 // StringSlice convert param to slice of string.
-// This function is deprecated, use generics feature of go1.18+ for replacement.
+// deprecated: use generics feature of go1.18+ for replacement.
 // Play: https://go.dev/play/p/W0TZDWCPFcI
 func StringSlice(slice any) []string {
 	v := sliceValue(slice)
@@ -642,7 +672,7 @@ func StringSlice(slice any) []string {
 }
 
 // IntSlice convert param to slice of int.
-// This function is deprecated, use generics feature of go1.18+ for replacement.
+// deprecated: use generics feature of go1.18+ for replacement.
 // Play: https://go.dev/play/p/UQDj-on9TGN
 func IntSlice(slice any) []int {
 	sv := sliceValue(slice)
@@ -662,15 +692,22 @@ func IntSlice(slice any) []int {
 // DeleteAt delete the element of slice at index.
 // Play: https://go.dev/play/p/800B1dPBYyd
 func DeleteAt[T any](slice []T, index int) []T {
-	if index >= len(slice) {
+	if index < 0 || index >= len(slice) {
-		index = len(slice) - 1
+		return slice[:len(slice)-1]
 	}
 
-	result := make([]T, len(slice)-1)
+	result := append([]T(nil), slice...)
-	copy(result, slice[:index])
+	copy(result[index:], result[index+1:])
-	copy(result[index:], slice[index+1:])
 
-	return result
+	// Set the last element to zero value, clean up the memory.
+	result[len(result)-1] = zeroValue[T]()
+
+	return result[:len(result)-1]
+}
+
+func zeroValue[T any]() T {
+	var zero T
+	return zero
 }
 
 // DeleteRange delete the element of slice from start index to end index（exclude).
@@ -766,46 +803,54 @@ func InsertAt[T any](slice []T, index int, value any) []T {
 		return slice
 	}
 
-	if v, ok := value.(T); ok {
+	switch v := value.(type) {
-		slice = append(slice[:index], append([]T{v}, slice[index:]...)...)
+	case T:
+		result := make([]T, size+1)
+		copy(result, slice[:index])
+		result[index] = v
+		copy(result[index+1:], slice[index:])
+		return result
+	case []T:
+		result := make([]T, size+len(v))
+		copy(result, slice[:index])
+		copy(result[index:], v)
+		copy(result[index+len(v):], slice[index:])
+		return result
+	default:
 		return slice
 	}
-
-	if v, ok := value.([]T); ok {
-		slice = append(slice[:index], append(v, slice[index:]...)...)
-		return slice
-	}
-
-	return slice
 }
 
 // UpdateAt update the slice element at index.
 // Play: https://go.dev/play/p/f3mh2KloWVm
 func UpdateAt[T any](slice []T, index int, value T) []T {
-	size := len(slice)
+	if index < 0 || index >= len(slice) {
-
-	if index < 0 || index >= size {
 		return slice
 	}
-	slice = append(slice[:index], append([]T{value}, slice[index+1:]...)...)
 
-	return slice
+	result := make([]T, len(slice))
+	copy(result, slice)
+
+	result[index] = value
+
+	return result
 }
 
 // Unique remove duplicate elements in slice.
 // Play: https://go.dev/play/p/AXw0R3ZTE6a
 func Unique[T comparable](slice []T) []T {
-	result := make([]T, 0, len(slice))
+	if len(slice) == 0 {
-	seen := make(map[T]struct{}, len(slice))
+		return slice
-
-	for i := range slice {
-		if _, ok := seen[slice[i]]; ok {
-			continue
 	}
 
-		seen[slice[i]] = struct{}{}
+	seen := make(map[T]struct{}, len(slice))
+	result := slice[:0]
 
-		result = append(result, slice[i])
+	for _, item := range slice {
+		if _, exists := seen[item]; !exists {
+			seen[item] = struct{}{}
+			result = append(result, item)
+		}
 	}
 
 	return result
@@ -815,18 +860,19 @@ func Unique[T comparable](slice []T) []T {
 // The function maintains the order of the elements.
 // Play: https://go.dev/play/p/GY7JE4yikrl
 func UniqueBy[T any, U comparable](slice []T, iteratee func(item T) U) []T {
-	result := make([]T, 0, len(slice))
+	if len(slice) == 0 {
-	seen := make(map[U]struct{}, len(slice))
+		return slice
-
-	for i := range slice {
-		key := iteratee(slice[i])
-		if _, ok := seen[key]; ok {
-			continue
 	}
 
-		seen[key] = struct{}{}
+	seen := make(map[U]struct{}, len(slice))
+	result := slice[:0]
 
-		result = append(result, slice[i])
+	for _, item := range slice {
+		key := iteratee(item)
+		if _, exists := seen[key]; !exists {
+			seen[key] = struct{}{}
+			result = append(result, item)
+		}
 	}
 
 	return result
@@ -836,19 +882,20 @@ func UniqueBy[T any, U comparable](slice []T, iteratee func(item T) U) []T {
 // The function maintains the order of the elements.
 // Play: https://go.dev/play/p/rwSacr-ZHsR
 func UniqueByComparator[T comparable](slice []T, comparator func(item T, other T) bool) []T {
-	result := make([]T, 0, len(slice))
+	if len(slice) == 0 {
-	seen := make([]T, 0, len(slice))
+		return slice
+	}
 
+	result := make([]T, 0, len(slice))
 	for _, item := range slice {
-		duplicate := false
+		isDuplicate := false
-		for _, seenItem := range seen {
+		for _, existing := range result {
-			if comparator(item, seenItem) {
+			if comparator(item, existing) {
-				duplicate = true
+				isDuplicate = true
 				break
 			}
 		}
-		if !duplicate {
+		if !isDuplicate {
-			seen = append(seen, item)
 			result = append(result, item)
 		}
 	}

slice/slice_concurrent.go

@@ -125,6 +125,8 @@ func ReduceConcurrent[T any](slice []T, initial T, reducer func(index int, item
 func FilterConcurrent[T any](slice []T, predicate func(index int, item T) bool, numThreads int) []T {
 	result := make([]T, 0)
 	var wg sync.WaitGroup
+	var mu sync.Mutex
+
 
 	workerChan := make(chan struct{}, numThreads)
 
@@ -137,7 +139,9 @@ func FilterConcurrent[T any](slice []T, predicate func(index int, item T) bool,
 			defer wg.Done()
 
 			if predicate(i, v) {
+				mu.Lock()
 				result = append(result, v)
+				mu.Unlock()
 			}
 
 			<-workerChan

strutil/string.go

@@ -396,7 +396,10 @@ func RemoveNonPrintable(str string) string {
 // StringToBytes converts a string to byte slice without a memory allocation.
 // Play: https://go.dev/play/p/7OyFBrf9AxA
 func StringToBytes(str string) (b []byte) {
-	return *(*[]byte)(unsafe.Pointer(&str))
+	return *(*[]byte)(unsafe.Pointer(&struct {
+		string
+		Cap int
+	}{str, len(str)}))
 }
 
 // BytesToString converts a byte slice to string without a memory allocation.

strutil/string_test.go

@@ -518,7 +518,8 @@ func TestStringToBytes(t *testing.T) {
 	assert := internal.NewAssert(t, "TestStringToBytes")
 
 	bytes := StringToBytes("abc")
-	assert.Equal(bytes, []byte{'a', 'b', 'c'})
+	assert.Equal([]byte{'a', 'b', 'c'}, bytes)
+	assert.Equal(3, cap(bytes))
 }
 
 func TestBytesToString(t *testing.T) {

validator/validator.go

@@ -182,8 +182,8 @@ func IsJSON(str string) bool {
 	return json.Unmarshal([]byte(str), &js) == nil
 }
 
-// IsAlphaNumericStr check if the string is alphanumeric.
+// IsAlphaNumeric check if the string is alphanumeric.
-// Play: todo
+// Play: https://go.dev/play/p/RHeESLrLg9c
 func IsAlphaNumeric(s string) bool {
 	return alphaNumericMatcher.MatchString(s)
 }

validator/validator_example_test.go

@@ -665,3 +665,21 @@ func ExampleIsChinaUnionPay() {
 	// true
 	// false
 }
+
+func ExampleIsAlphaNumeric() {
+	result1 := IsAlphaNumeric("ABC")
+	result2 := IsAlphaNumeric("123")
+	result3 := IsAlphaNumeric("abc123")
+	result4 := IsAlphaNumeric("abc123@#$")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	// Output:
+	// true
+	// true
+	// true
+	// false
+}