fix: fix dns regex matcher

* fix: 修改 README_zh-CN.md datetime 重复 IsLeapYear问题

* fix: 修改 README_zh-CN.md 18. slice 回到目录

* fix(validator): [IsChineseIdNum] fix 身份证效验 新增 省份、生日、效验码效验，修改ContainLower/IsNumber 注释错误

* fix(validator): [IsChineseIdNum] fix 修改测试

---------

Co-authored-by: dengjiaxiang <19181730103@189.cn>
Co-authored-by: dengrandpa <dengrandpapa@outlook.com>

README.md

@@ -21,7 +21,7 @@
 
 ## <a href="https://www.golancet.cn/en/" target="_blank"> Website</a> | [简体中文](./README_zh-CN.md)
 
-## Feature
+## Features
 
 -   👏 Comprehensive, efficient and reusable.
 -   💪 600+ go util functions, support string, slice, datetime, net, crypt...
@@ -453,10 +453,14 @@ import "github.com/duke-git/lancet/v2/cryptor"
     [[play](https://go.dev/play/p/uef0q1fz53I)]
 -   **<big>GenerateRsaKeyPair</big>** : creates rsa private and public key.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/cryptor.md#GenerateRsaKeyPair)]
+    [[play](https://go.dev/play/p/sSVmkfENKMz)]
 -   **<big>RsaEncryptOAEP</big>** : encrypts the given data with RSA-OAEP.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/cryptor.md#RsaEncryptOAEP)]
+    [[play](https://go.dev/play/p/sSVmkfENKMz)]
 -   **<big>RsaDecryptOAEP</big>** : decrypts the data with RSA-OAEP
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/cryptor.md#RsaDecryptOAEP)]
+    [[play](https://go.dev/play/p/sSVmkfENKMz)]
+
 
 <h3 id="datetime"> 7. Datetime package supports date and time format and compare. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
@@ -1553,6 +1557,7 @@ import "github.com/duke-git/lancet/v2/strutil"
     [[play](https://go.dev/play/p/6zXRH_c0Qd3)]
 -   **<big>IsNotBlank</big>** : checks if a string is not whitespace or not empty.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/strutil.md#IsNotBlank)]
+    [[play](https://go.dev/play/p/e_oJW0RAquA)]
 -   **<big>HasPrefixAny</big>** : checks if a string starts with any of an array of specified strings.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/strutil.md#HasPrefixAny)]
     [[play](https://go.dev/play/p/8UUTl2C5slo)]

README_zh-CN.md

@@ -453,10 +453,14 @@ import "github.com/duke-git/lancet/v2/cryptor"
     [[play](https://go.dev/play/p/uef0q1fz53I)]
 -   **<big>GenerateRsaKeyPair</big>** : 创建rsa公钥私钥和key。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#GenerateRsaKeyPair)]
+    [[play](https://go.dev/play/p/sSVmkfENKMz)]
 -   **<big>RsaEncryptOAEP</big>** : rsa OAEP加密。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#RsaEncryptOAEP)]
+    [[play](https://go.dev/play/p/sSVmkfENKMz)]
 -   **<big>RsaDecryptOAEP</big>** : rsa OAEP解密。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/cryptor.md#RsaDecryptOAEP)]
+    [[play](https://go.dev/play/p/sSVmkfENKMz)]
+
 
 <h3 id="datetime"> 7. datetime 日期时间处理包，格式化日期，比较日期。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
@@ -568,9 +572,6 @@ import "github.com/duke-git/lancet/v2/datetime"
 -   **<big>IsLeapYear</big>** :验证是否是闰年。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/datetime.md#IsLeapYear)]
     [[play](https://go.dev/play/p/xS1eS2ejGew)]
--   **<big>IsLeapYear</big>** : check if param `year` is leap year or not.
-    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/datetime.md#IsLeapYear)]
-    [[play](https://go.dev/play/p/xS1eS2ejGew)]
 -   **<big>BetweenSeconds</big>** : 返回两个时间的间隔秒数。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/datetime.md#BetweenSeconds)]
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/datetime.md#BetweenSeconds)]
@@ -1122,7 +1123,7 @@ import "github.com/duke-git/lancet/v2/retry"
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/retry.md#RetryTimes)]
     [[play](https://go.dev/play/p/ssfVeU2SwLO)]
 
-<h3 id="slice"> 18. slice 包含操作切片的方法集合。&nbsp; &nbsp; &nbsp; &nbsp; [回到目录](#index)
+<h3 id="slice"> 18. 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
 import "github.com/duke-git/lancet/v2/slice"
@@ -1560,6 +1561,7 @@ import "github.com/duke-git/lancet/v2/strutil"
     [[play](https://go.dev/play/p/6zXRH_c0Qd3)]
 -   **<big>IsNotBlank</big>** : 检查字符串是否不为空。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/strutil.md#IsNotBlank)]
+    [[play](https://go.dev/play/p/e_oJW0RAquA)]
 -   **<big>HasPrefixAny</big>** : 检查字符串是否以指定字符串数组中的任何一个开头。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/strutil.md#HasPrefixAny)]
     [[play](https://go.dev/play/p/8UUTl2C5slo)]

compare/compare_internal.go

@@ -70,7 +70,7 @@ func compareRefValue(operator string, leftObj, rightObj any, kind reflect.Kind)
 
 			switch operator {
 			case equal:
-				if bytes.Compare(bytesObj1, bytesObj2) == 0 {
+				if bytes.Equal(bytesObj1, bytesObj2) {
 					return true
 				}
 			case lessThan:

cryptor/crypto.go

@@ -508,14 +508,14 @@ func RsaDecrypt(data []byte, privateKeyFileName string) []byte {
 }
 
 // GenerateRsaKeyPair create rsa private and public key.
-// Play: todo
+// Play: https://go.dev/play/p/sSVmkfENKMz
 func GenerateRsaKeyPair(keySize int) (*rsa.PrivateKey, *rsa.PublicKey) {
 	privateKey, _ := rsa.GenerateKey(rand.Reader, keySize)
 	return privateKey, &privateKey.PublicKey
 }
 
 // RsaEncryptOAEP encrypts the given data with RSA-OAEP.
-// Play: todo
+// Play: https://go.dev/play/p/sSVmkfENKMz
 func RsaEncryptOAEP(data []byte, label []byte, key rsa.PublicKey) ([]byte, error) {
 	encryptedBytes, err := rsa.EncryptOAEP(sha256.New(), rand.Reader, &key, data, label)
 	if err != nil {
@@ -526,7 +526,7 @@ func RsaEncryptOAEP(data []byte, label []byte, key rsa.PublicKey) ([]byte, error
 }
 
 // RsaDecryptOAEP decrypts the data with RSA-OAEP.
-// Play: todo
+// Play: https://go.dev/play/p/sSVmkfENKMz
 func RsaDecryptOAEP(ciphertext []byte, label []byte, key rsa.PrivateKey) ([]byte, error) {
 	decryptedBytes, err := rsa.DecryptOAEP(sha256.New(), rand.Reader, &key, ciphertext, label)
 	if err != nil {

docs/api/packages/cryptor.md

@@ -1437,7 +1437,7 @@ func main() {
 func GenerateRsaKeyPair(keySize int) (*rsa.PrivateKey, *rsa.PublicKey)
 ```
 
-<b>示例:></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/sSVmkfENKMz)</span></b>
 
 ```go
 package main
@@ -1462,7 +1462,7 @@ func main() {
 func RsaEncryptOAEP(data []byte, label []byte, key rsa.PublicKey) ([]byte, error)
 ```
 
-<b>示例:></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/sSVmkfENKMz)</span></b>
 
 ```go
 package main
@@ -1505,7 +1505,7 @@ func main() {
 func RsaDecryptOAEP(ciphertext []byte, label []byte, key rsa.PrivateKey) ([]byte, error)
 ```
 
-<b>示例:></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/sSVmkfENKMz)</span></b>
 
 ```go
 package main

docs/api/packages/fileutil.md

@@ -843,7 +843,7 @@ func main() {
 
 ### <span id="ReadFile">ReadFile</span>
 
-<p>读取文件或者URL</p>
+<p>读取文件或者URL。</p>
 
 <b>函数签名:</b>
 
@@ -851,7 +851,7 @@ func main() {
 func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error) 
 ```
 
-<b>示例:<span style="float:right;display:inline-block;"></span></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/uNep3Tr8fqF)</span></b>
 
 ```go
 package main
@@ -862,19 +862,19 @@ import (
 )
 
 func main() {
-   reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
-	if err != nil {
-		return
-	}
-	defer fn()
+    reader, fn, err := fileutil.ReadFile("https://httpbin.org/robots.txt")
+    if err != nil {
+        return
+    }
+    defer fn()
 
-	dat, err := io.ReadAll(reader)
-	if err != nil {
-		return
-	}
-	fmt.Println(string(dat))
-	// Output:
-	// User-agent: *
-	// Disallow: /deny
+    dat, err := io.ReadAll(reader)
+    if err != nil {
+        return
+    }
+    fmt.Println(string(dat))
+    // Output:
+    // User-agent: *
+    // Disallow: /deny
 }
 ```

docs/api/packages/slice.md

@@ -2488,4 +2488,35 @@ func main() {
 	// [[2 4] [1 3 5]]
 	// [[1 2] [3 4] [5]]
 }
+```
+
+
+### <span id="Random">Random</span>
+
+<p>随机返回切片中元素以及下标, 当切片长度为0时返回下标-1</p>
+
+<b>函数签名:</b>
+
+```go
+func Random[T any](slice []T) (val T, idx int)
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](TODO)</span></b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	nums := []int{1, 2, 3, 4, 5}
+
+	val, idx := slice.Random(nums)
+	if idx >= 0 && idx < len(nums) && slice.Contain(nums, val) {
+		fmt.Println("okk")
+	}
+	// Output:
+	// okk
+}
 ```

docs/api/packages/strutil.md

@@ -1080,13 +1080,13 @@ func main() {
 
 <p>Checks if a string is not whitespace or not empty.</p>
 
-<b>Signature:</b>
+<b>函数签名:</b>
 
 ```go
 func IsNotBlank(str string) bool
 ```
 
-<b>Example:</b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/e_oJW0RAquA)</span></b>
 
 ```go
 import (
@@ -1095,11 +1095,11 @@ import (
 )
 
 func main() {
-    result1 := IsNotBlank("")
-    result2 := IsNotBlank("	")
-    result3 := IsNotBlank("\t\v\f\n")
-    result4 := IsNotBlank(" 中文")
-    result5 := IsNotBlank(" 	world	")
+    result1 := strutil.IsNotBlank("")
+    result2 := strutil.IsNotBlank("	")
+    result3 := strutil.IsNotBlank("\t\v\f\n")
+    result4 := strutil.IsNotBlank(" 中文")
+    result5 := strutil.IsNotBlank(" 	world	")
     
     fmt.Println(result1)
     fmt.Println(result2)

docs/en/api/packages/cryptor.md

@@ -1437,7 +1437,7 @@ func main() {
 func GenerateRsaKeyPair(keySize int) (*rsa.PrivateKey, *rsa.PublicKey)
 ```
 
-<b>Example:></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/sSVmkfENKMz)</span></b>
 
 ```go
 package main
@@ -1462,7 +1462,7 @@ func main() {
 func RsaEncryptOAEP(data []byte, label []byte, key rsa.PublicKey) ([]byte, error)
 ```
 
-<b>Example:></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/sSVmkfENKMz)</span></b>
 
 ```go
 package main
@@ -1505,7 +1505,7 @@ func main() {
 func RsaDecryptOAEP(ciphertext []byte, label []byte, key rsa.PrivateKey) ([]byte, error)
 ```
 
-<b>Example:></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/sSVmkfENKMz)</span></b>
 
 ```go
 package main

docs/en/api/packages/fileutil.md

@@ -843,7 +843,7 @@ func main() {
 
 ### <span id="ReadFile">ReadFile</span>
 
-<p>Read File/URL</p>
+<p>Read File or URL.</p>
 
 <b>Signature:</b>
 
@@ -851,7 +851,7 @@ func main() {
 func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error) 
 ```
 
-<b>Example:<span style="float:right;display:inline-block;"> </span></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/uNep3Tr8fqF)</span></b>
 
 ```go
 package main
@@ -862,19 +862,19 @@ import (
 )
 
 func main() {
-   reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
-	if err != nil {
-		return
-	}
-	defer fn()
+    reader, fn, err := fileutil.ReadFile("https://httpbin.org/robots.txt")
+    if err != nil {
+        return
+    }
+    defer fn()
 
-	dat, err := io.ReadAll(reader)
-	if err != nil {
-		return
-	}
-	fmt.Println(string(dat))
-	// Output:
-	// User-agent: *
-	// Disallow: /deny
+    dat, err := io.ReadAll(reader)
+    if err != nil {
+        return
+    }
+    fmt.Println(string(dat))
+    // Output:
+    // User-agent: *
+    // Disallow: /deny
 }
 ```

docs/en/api/packages/slice.md

@@ -2486,4 +2486,34 @@ func main() {
 	// [[2 4] [1 3 5]]
 	// [[1 2] [3 4] [5]]
 }
+```
+
+### <span id="Random">Random</span>
+
+<p>Random get a random item of slice, return idx=-1 when slice is empty. </p>
+
+<b>Signature:</b>
+
+```go
+func Random[T any](slice []T) (val T, idx int)
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](TODO)</span></b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/slice"
+)
+
+func main() {
+	nums := []int{1, 2, 3, 4, 5}
+
+	val, idx := slice.Random(nums)
+	if idx >= 0 && idx < len(nums) && slice.Contain(nums, val) {
+		fmt.Println("okk")
+	}
+	// Output:
+	// okk
+}
 ```

docs/en/api/packages/strutil.md

@@ -1087,7 +1087,7 @@ func main() {
 func IsNotBlank(str string) bool
 ```
 
-<b>Example:</b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/e_oJW0RAquA)</span></b>
 
 ```go
 import (
@@ -1096,11 +1096,11 @@ import (
 )
 
 func main() {
-    result1 := IsNotBlank("")
-    result2 := IsNotBlank("	")
-    result3 := IsNotBlank("\t\v\f\n")
-    result4 := IsNotBlank(" 中文")
-    result5 := IsNotBlank(" 	world	")
+    result1 := strutil.IsNotBlank("")
+    result2 := strutil.IsNotBlank("	")
+    result3 := strutil.IsNotBlank("\t\v\f\n")
+    result4 := strutil.IsNotBlank(" 中文")
+    result5 := strutil.IsNotBlank(" 	world	")
     
     fmt.Println(result1)
     fmt.Println(result2)

fileutil/file.go

@@ -627,7 +627,7 @@ func WriteBytesToFile(filepath string, content []byte) error {
 }
 
 // ReadFile get file reader by a url or a local file
-// Play: todo
+// Play: https://go.dev/play/p/uNep3Tr8fqF
 func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error) {
 	switch {
 	case validator.IsUrl(path):

netutil/http.go

@@ -14,6 +14,7 @@ package netutil
 
 import (
 	"bytes"
+	"context"
 	"crypto/tls"
 	"encoding/json"
 	"errors"
@@ -110,22 +111,23 @@ type HttpClientConfig struct {
 	Verbose          bool
 }
 
-// defaultHttpClientConfig defalut client config
+// defaultHttpClientConfig defalut client config.
 var defaultHttpClientConfig = &HttpClientConfig{
 	Compressed:       false,
 	HandshakeTimeout: 20 * time.Second,
 	ResponseTimeout:  40 * time.Second,
 }
 
-// HttpClient is used for sending http request
+// HttpClient is used for sending http request.
 type HttpClient struct {
 	*http.Client
 	TLS     *tls.Config
 	Request *http.Request
 	Config  HttpClientConfig
+	Context context.Context
 }
 
-// NewHttpClient make a HttpClient instance
+// NewHttpClient make a HttpClient instance.
 func NewHttpClient() *HttpClient {
 	client := &HttpClient{
 		Client: &http.Client{
@@ -141,7 +143,7 @@ func NewHttpClient() *HttpClient {
 	return client
 }
 
-// NewHttpClientWithConfig make a HttpClient instance with pass config
+// NewHttpClientWithConfig make a HttpClient instance with pass config.
 func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient {
 	if config == nil {
 		config = defaultHttpClientConfig
@@ -176,6 +178,11 @@ func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, err
 	rawUrl := request.RawURL
 
 	req, err := http.NewRequest(request.Method, rawUrl, bytes.NewBuffer(request.Body))
+
+	if client.Context != nil {
+		req, err = http.NewRequestWithContext(client.Context, request.Method, rawUrl, bytes.NewBuffer(request.Body))
+	}
+
 	if err != nil {
 		return nil, err
 	}

slice/slice.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/duke-git/lancet/v2/random"
 	"golang.org/x/exp/constraints"
 )
 
@@ -1229,3 +1230,14 @@ func Partition[T any](slice []T, predicates ...func(item T) bool) [][]T {
 
 	return result
 }
+
+// Random get a random item of slice, return idx=-1 when slice is empty
+// Play: todo
+func Random[T any](slice []T) (val T, idx int) {
+	if len(slice) == 0 {
+		return val, -1
+	}
+
+	idx = random.RandInt(0, len(slice))
+	return slice[idx], idx
+}

slice/slice_example_test.go

@@ -1063,3 +1063,14 @@ func ExamplePartition() {
 	// [[2 4] [1 3 5]]
 	// [[1 2] [3 4] [5]]
 }
+
+func ExampleRandom() {
+	nums := []int{1, 2, 3, 4, 5}
+
+	val, idx := Random(nums)
+	if idx >= 0 && idx < len(nums) && Contain(nums, val) {
+		fmt.Println("okk")
+	}
+	// Output:
+	// okk
+}

slice/slice_test.go

@@ -1185,3 +1185,28 @@ func TestPartition(t *testing.T) {
 	assert.Equal([][]int{{2, 4}, {1, 3, 5}}, Partition([]int{1, 2, 3, 4, 5}, func(n int) bool { return n%2 == 0 }))
 	assert.Equal([][]int{{1, 2}, {3, 4}, {5}}, Partition([]int{1, 2, 3, 4, 5}, func(n int) bool { return n == 1 || n == 2 }, func(n int) bool { return n == 2 || n == 3 || n == 4 }))
 }
+
+func TestRandom(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestRandom")
+
+	var arr []int
+	var val, idx int
+
+	_, idx = Random(arr)
+	assert.Equal(-1, idx)
+
+	arr = []int{}
+	_, idx = Random(arr)
+	assert.Equal(-1, idx)
+
+	arr = []int{1}
+	val, idx = Random(arr)
+	assert.Equal(0, idx)
+	assert.Equal(arr[idx], val)
+
+	arr = []int{1, 2, 3}
+	val, idx = Random(arr)
+	assert.Greater(len(arr), idx)
+	assert.Equal(arr[idx], val)
+}

strutil/string.go

@@ -409,6 +409,7 @@ func IsBlank(str string) bool {
 }
 
 // IsNotBlank checks if a string is not whitespace, not empty.
+// Play: https://go.dev/play/p/e_oJW0RAquA
 func IsNotBlank(str string) bool {
 	return !IsBlank(str)
 }

strutil/string_internal.go

@@ -32,8 +32,10 @@ func splitIntoStrings(s string, upperCase bool) []string {
 
 	for i := 0; i < len(runes)-1; i++ {
 		if isUpper(runes[i][0]) && isLower(runes[i+1][0]) {
-			runes[i+1] = append([]rune{runes[i][len(runes[i])-1]}, runes[i+1]...)
-			runes[i] = runes[i][:len(runes[i])-1]
+			length := len(runes[i]) - 1
+			temp := runes[i][length]
+			runes[i+1] = append([]rune{temp}, runes[i+1]...)
+			runes[i] = runes[i][:length]
 		}
 	}
 

validator/validator.go

@@ -6,12 +6,14 @@ package validator
 
 import (
 	"encoding/json"
+	"fmt"
 	"net"
 	"net/url"
 	"reflect"
 	"regexp"
 	"strconv"
 	"strings"
+	"time"
 	"unicode"
 )
 
@@ -21,10 +23,10 @@ var (
 	numberRegexMatcher     *regexp.Regexp = regexp.MustCompile(`\d`)
 	intStrMatcher          *regexp.Regexp = regexp.MustCompile(`^[\+-]?\d+$`)
 	urlMatcher             *regexp.Regexp = regexp.MustCompile(`^((ftp|http|https?):\/\/)?(\S+(:\S*)?@)?((([1-9]\d?|1\d\d|2[01]\d|22[0-3])(\.(1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.([0-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(([a-zA-Z0-9]+([-\.][a-zA-Z0-9]+)*)|((www\.)?))?(([a-z\x{00a1}-\x{ffff}0-9]+-?-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.([a-z\x{00a1}-\x{ffff}]{2,}))?))(:(\d{1,5}))?((\/|\?|#)[^\s]*)?$`)
-	dnsMatcher             *regexp.Regexp = regexp.MustCompile(`^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$`)
+	dnsMatcher             *regexp.Regexp = regexp.MustCompile(`^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$`)
 	emailMatcher           *regexp.Regexp = regexp.MustCompile(`\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*`)
 	chineseMobileMatcher   *regexp.Regexp = regexp.MustCompile(`^1(?:3\d|4[4-9]|5[0-35-9]|6[67]|7[013-8]|8\d|9\d)\d{8}$`)
-	chineseIdMatcher       *regexp.Regexp = regexp.MustCompile(`^[1-9]\d{5}(18|19|20|21|22)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$`)
+	chineseIdMatcher       *regexp.Regexp = regexp.MustCompile(`^(\d{17})([0-9]|X|x)$`)
 	chineseMatcher         *regexp.Regexp = regexp.MustCompile("[\u4e00-\u9fa5]")
 	chinesePhoneMatcher    *regexp.Regexp = regexp.MustCompile(`\d{3}-\d{8}|\d{4}-\d{7}|\d{4}-\d{8}`)
 	creditCardMatcher      *regexp.Regexp = regexp.MustCompile(`^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\\d{3})\\d{11}|6[27][0-9]{14})$`)
@@ -39,6 +41,52 @@ var (
 	chinaUnionPay          *regexp.Regexp = regexp.MustCompile(`^62[0-9]{14,17}$`)
 )
 
+var (
+	// Identity card formula
+	factor = [17]int{7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2}
+	// ID verification bit
+	verifyStr = [11]string{"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"}
+	// Starting year of ID card
+	birthStartYear = 1900
+	// Province code
+	provinceKv = map[string]struct{}{
+		"11": {},
+		"12": {},
+		"13": {},
+		"14": {},
+		"15": {},
+		"21": {},
+		"22": {},
+		"23": {},
+		"31": {},
+		"32": {},
+		"33": {},
+		"34": {},
+		"35": {},
+		"36": {},
+		"37": {},
+		"41": {},
+		"42": {},
+		"43": {},
+		"44": {},
+		"45": {},
+		"46": {},
+		"50": {},
+		"51": {},
+		"52": {},
+		"53": {},
+		"54": {},
+		"61": {},
+		"62": {},
+		"63": {},
+		"64": {},
+		"65": {},
+		//"71": {},
+		//"81": {},
+		//"82": {},
+	}
+)
+
 // IsAlpha checks if the string contains only letters (a-zA-Z).
 // Play: https://go.dev/play/p/7Q5sGOz2izQ
 func IsAlpha(str string) bool {
@@ -120,7 +168,7 @@ func ContainLetter(str string) bool {
 	return letterRegexMatcher.MatchString(str)
 }
 
-// ContainLetter check if the string contain at least one number.
+// ContainNumber check if the string contain at least one number.
 func ContainNumber(input string) bool {
 	return numberRegexMatcher.MatchString(input)
 }
@@ -228,7 +276,32 @@ func IsChineseMobile(mobileNum string) bool {
 // IsChineseIdNum check if the string is chinese id card.
 // Play: https://go.dev/play/p/d8EWhl2UGDF
 func IsChineseIdNum(id string) bool {
-	return chineseIdMatcher.MatchString(id)
+	// All characters should be numbers, and the last digit can be either x or X
+	if !chineseIdMatcher.MatchString(id) {
+		return false
+	}
+
+	// Verify province codes and complete all province codes according to GB/T2260
+	_, ok := provinceKv[id[0:2]]
+	if !ok {
+		return false
+	}
+
+	// Verify birthday, must be greater than birthStartYear and less than the current year
+	birthStr := fmt.Sprintf("%s-%s-%s", id[6:10], id[10:12], id[12:14])
+	birthday, err := time.Parse("2006-01-02", birthStr)
+	if err != nil || birthday.After(time.Now()) || birthday.Year() < birthStartYear {
+		return false
+	}
+
+	// Verification code
+	sum := 0
+	for i, c := range id[:17] {
+		v, _ := strconv.Atoi(string(c))
+		sum += v * factor[i]
+	}
+
+	return verifyStr[sum%11] == strings.ToUpper(id[17:18])
 }
 
 // ContainChinese check if the string contain mandarin chinese.
@@ -384,7 +457,7 @@ func IsGBK(data []byte) bool {
 	return true
 }
 
-// IsNumberStr check if the value is number(integer, float) or not.
+// IsNumber check if the value is number(integer, float) or not.
 // Play: https://go.dev/play/p/mdJHOAvtsvF
 func IsNumber(v any) bool {
 	return IsInt(v) || IsFloat(v)

validator/validator_example_test.go

@@ -154,7 +154,7 @@ func ExampleIsChineseMobile() {
 }
 
 func ExampleIsChineseIdNum() {
-	result1 := IsChineseIdNum("210911192105130715")
+	result1 := IsChineseIdNum("210911192105130714")
 	result2 := IsChineseIdNum("123456")
 
 	fmt.Println(result1)

validator/validator_test.go

@@ -271,7 +271,11 @@ func TestIsDns(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIsDns")
 
 	assert.Equal(true, IsDns("abc.com"))
-	assert.Equal(false, IsDns("a.b.com"))
+	assert.Equal(true, IsDns("123.cn"))
+	assert.Equal(true, IsDns("a.b.com"))
+
+	assert.Equal(false, IsDns("a.b.c"))
+	assert.Equal(false, IsDns("a@b.com"))
 	assert.Equal(false, IsDns("http://abc.com"))
 }
 
@@ -320,10 +324,13 @@ func TestIsChineseIdNum(t *testing.T) {
 
 	assert := internal.NewAssert(t, "TestIsChineseIdNum")
 
-	assert.Equal(true, IsChineseIdNum("210911192105130715"))
-	assert.Equal(true, IsChineseIdNum("21091119210513071X"))
-	assert.Equal(true, IsChineseIdNum("21091119210513071x"))
+	assert.Equal(true, IsChineseIdNum("210911192105130714"))
+	assert.Equal(true, IsChineseIdNum("11010519491231002X"))
+	assert.Equal(true, IsChineseIdNum("11010519491231002x"))
 	assert.Equal(false, IsChineseIdNum("123456"))
+	assert.Equal(false, IsChineseIdNum("990911192105130714"))
+	assert.Equal(false, IsChineseIdNum("990911189905130714"))
+	assert.Equal(false, IsChineseIdNum("210911222205130714"))
 }
 
 func TestIsCreditCard(t *testing.T) {