..

src/NSExt/Extensions/ByteExtensions.cs

@@ -24,3 +24,5 @@ public static class ByteExtensions
         return e.GetString(me);
     }
 }
+
+

src/NSExt/Extensions/CharExtensions.cs

@@ -0,0 +1,26 @@
+namespace NSExt.Extensions;
+
+public static class CharExtensions
+{
+    /// <summary>
+    ///     是否数字或大小写字母
+    /// </summary>
+    /// <param name="me"></param>
+    /// <returns></returns>
+    public static bool IsAsciiLetterOrDigit(this char me)
+    {
+        return (((uint)me - 'A') & ~0x20) < 26 || (uint)me - '0' < 10;
+    }
+
+    /// <summary>
+    ///     是否base64字符
+    /// </summary>
+    /// <param name="me"></param>
+    /// <returns></returns>
+    public static bool IsBase64Character(this char me)
+    {
+        return IsAsciiLetterOrDigit(me) || me is '+' or '/' or '=';
+    }
+}
+
+

src/NSExt/Extensions/DateTimeExtensions.cs

@@ -43,19 +43,6 @@ public static class DateTimeExtensions
     }
 
 
-    // ReSharper disable once InconsistentNaming
-    public static string yyyyMM(this DateTime me)
-    {
-        return me.ToString("yyyyMM");
-    }
-
-    // ReSharper disable once InconsistentNaming
-    public static string yyyyMMdd(this DateTime me)
-    {
-        return me.ToString("yyyyMMdd");
-    }
-
-
     // ReSharper disable once InconsistentNaming
     public static string yyyy_MM(this DateTime me)
     {
@@ -86,4 +73,17 @@ public static class DateTimeExtensions
     {
         return me.ToString("yyyy-MM-dd HH:mm:ss.fff");
     }
+
+
+    // ReSharper disable once InconsistentNaming
+    public static string yyyyMM(this DateTime me)
+    {
+        return me.ToString("yyyyMM");
+    }
+
+    // ReSharper disable once InconsistentNaming
+    public static string yyyyMMdd(this DateTime me)
+    {
+        return me.ToString("yyyyMMdd");
+    }
 }

src/NSExt/Extensions/DbCommandExtensions.cs

@@ -27,3 +27,4 @@ public static class DbCommandExtensions
         return sql;
     }
 }
+

src/NSExt/Extensions/DecimalExtensions.cs

@@ -14,3 +14,5 @@ public static class DecimalExtensions
         return dec;
     }
 }
+
+

src/NSExt/Extensions/EnumExtensions.cs

@@ -15,3 +15,5 @@ public static class EnumExtensions
         return (attrs.Length != 0 ? attrs[0].Description : Enum.GetName(t, e)) ?? "";
     }
 }
+
+

src/NSExt/Extensions/EnumerableExtensions.cs

@@ -24,3 +24,5 @@ public static class EnumerableExtensions
         return me is null || !me.Any();
     }
 }
+
+

src/NSExt/Extensions/GenericExtensions.cs

@@ -41,3 +41,5 @@ public static class GenericExtensions
         return me.Equals(compare) ? ret : me;
     }
 }
+
+

src/NSExt/Extensions/IntExtensions.cs

@@ -24,8 +24,15 @@ public static class IntExtensions
         return new Random(Guid.NewGuid().GetHashCode()).Next(me[0], me[1]);
     }
 
+    /// <summary>
+    ///     转换成ipv4
+    /// </summary>
+    /// <param name="me"></param>
+    /// <returns></returns>
     public static string ToIpV4(this int me)
     {
         return string.Join(".", BitConverter.GetBytes(me).Reverse());
     }
 }
+
+

src/NSExt/Extensions/LoggerExtensions.cs

@@ -64,3 +64,5 @@ public static class LoggerExtensions
         me.LogWarning(CallerInfoMessage(message, callerName, callerFilePath, callerLineNumber));
     }
 }
+
+

src/NSExt/Extensions/LongExtensions.cs

@@ -25,3 +25,6 @@ public static class LongExtensions
         return new DateTime(1970, 1, 1).AddMilliseconds(msFrom1970).ToLocalTime();
     }
 }
+
+
+

src/NSExt/Extensions/ObjectExtensions.cs

@@ -31,3 +31,6 @@ public static class ObjectExtensions
                                            });
     }
 }
+
+
+

src/NSExt/Extensions/StringExtensions.cs

@@ -7,6 +7,21 @@ namespace NSExt.Extensions;
 
 public static class StringExtensions
 {
+    /// <summary>
+    ///     MD5 hmac编码
+    /// </summary>
+    /// <param name="me">字符串</param>
+    /// <param name="key">密钥</param>
+    /// <param name="e">字符串使用的编码</param>
+    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
+    private static string Md5Hmac(this string me, string key, Encoding e)
+    {
+        using var md5Hmac = new HMACMD5(e.GetBytes(key));
+        return BitConverter.ToString(md5Hmac.ComputeHash(e.GetBytes(me)))
+                           .Replace("-", string.Empty)
+                           .ToLower(CultureInfo.CurrentCulture);
+    }
+
     /// <summary>
     ///     base64编码
     /// </summary>
@@ -80,18 +95,6 @@ public static class StringExtensions
         return System.DateTime.ParseExact(me, format, CultureInfo.CurrentCulture);
     }
 
-
-    /// <summary>
-    ///     将字符串转换成日期对象
-    /// </summary>
-    /// <param name="me">待转换字符串</param>
-    /// <param name="def">转换失败时返回的日期对象</param>
-    /// <returns>转换后的日期对象</returns>
-    public static DateTime DateTimeTry(this string me, DateTime def)
-    {
-        return !System.DateTime.TryParse(me, out var ret) ? def : ret;
-    }
-
     /// <summary>
     ///     将字符串转换成日期对象
     /// </summary>
@@ -106,6 +109,18 @@ public static class StringExtensions
                    : ret;
     }
 
+
+    /// <summary>
+    ///     将字符串转换成日期对象
+    /// </summary>
+    /// <param name="me">待转换字符串</param>
+    /// <param name="def">转换失败时返回的日期对象</param>
+    /// <returns>转换后的日期对象</returns>
+    public static DateTime DateTimeTry(this string me, DateTime def)
+    {
+        return !System.DateTime.TryParse(me, out var ret) ? def : ret;
+    }
+
     /// <summary>
     ///     string to decimal
     /// </summary>
@@ -186,6 +201,22 @@ public static class StringExtensions
         return e.GetBytes(me);
     }
 
+    /// <summary>
+    ///     对一个字符串进行sha1 hash运算
+    /// </summary>
+    /// <param name="me">对一个字符串进行sha1 hash运算</param>
+    /// <param name="secret">密钥</param>
+    /// <param name="e">使用的编码</param>
+    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
+    public static string HmacSha1(this string me, string secret, Encoding e)
+    {
+        using var hmacSha1 = new HMACSHA1(e.GetBytes(secret));
+
+        return BitConverter.ToString(hmacSha1.ComputeHash(e.GetBytes(me)))
+                           .Replace("-", string.Empty)
+                           .ToLower(CultureInfo.CurrentCulture);
+    }
+
     /// <summary>
     ///     解码html编码
     /// </summary>
@@ -240,6 +271,35 @@ public static class StringExtensions
         return !long.TryParse(me, out var ret) ? def : ret;
     }
 
+    /// <summary>
+    ///     ipv4格式转int32格式
+    /// </summary>
+    /// <param name="me"></param>
+    /// <returns></returns>
+    public static int IpV4ToInt32(this string me)
+    {
+        return BitConverter.ToInt32(me.Split('.').Select(byte.Parse).Reverse().ToArray(), 0);
+    }
+
+
+    /// <summary>
+    ///     是否base64字符串
+    /// </summary>
+    /// <param name="me">字符串</param>
+    /// <returns></returns>
+    public static bool IsBase64String(this string me)
+    {
+        // 一个合法的Base64，有着以下特征：
+        // 字符串的长度为4的整数倍。
+        // 字符串的符号取值只能在A -Z, a -z, 0 -9, +, /, =共计65个字符中，且 = 如果出现就必须在结尾出现。
+        if (!me.All(x => x.IsBase64Character())) return false;
+        if (me.Length % 4 != 0) return false;
+        var firstEqualSignPos = me.IndexOf('=');
+        if (firstEqualSignPos < 0) return true;
+        var lastEqualSignPos = me.LastIndexOf('=');
+        return lastEqualSignPos == me.Length - 1 && me[firstEqualSignPos..lastEqualSignPos].All(x => x == '=');
+    }
+
 
     /// <summary>
     ///     将一个json字符串反序列化成为jObject对象
@@ -251,6 +311,11 @@ public static class StringExtensions
         return Newtonsoft.Json.Linq.JObject.Parse(me);
     }
 
+    /// <summary>
+    ///     中文姓名打马赛克
+    /// </summary>
+    /// <param name="me"></param>
+    /// <returns></returns>
     public static string MaskChineseName(this string me)
     {
         if (me.Length == 2) return "*" + me[1..];
@@ -269,37 +334,6 @@ public static class StringExtensions
     }
 
 
-    /// <summary>
-    ///     对一个字符串进行sha1 hash运算
-    /// </summary>
-    /// <param name="me">字符串</param>
-    /// <param name="e">字符串使用的编码</param>
-    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
-    public static string Sha1(this string me, Encoding e)
-    {
-        using var sha1 = SHA1.Create();
-        return BitConverter.ToString(sha1.ComputeHash(e.GetBytes(me)))
-                           .Replace("-", string.Empty)
-                           .ToLower(CultureInfo.CurrentCulture);
-    }
-
-    /// <summary>
-    ///     对一个字符串进行sha1 hash运算
-    /// </summary>
-    /// <param name="me">对一个字符串进行sha1 hash运算</param>
-    /// <param name="secret">密钥</param>
-    /// <param name="e">使用的编码</param>
-    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
-    public static string HmacSha1(this string me, string secret, Encoding e)
-    {
-        using var hmacSha1 = new HMACSHA1(e.GetBytes(secret));
-
-        return BitConverter.ToString(hmacSha1.ComputeHash(e.GetBytes(me)))
-                           .Replace("-", string.Empty)
-                           .ToLower(CultureInfo.CurrentCulture);
-    }
-
-
     /// <summary>
     ///     对一个字符串进行md5hash运算
     /// </summary>
@@ -314,22 +348,6 @@ public static class StringExtensions
                            .ToLower(CultureInfo.CurrentCulture);
     }
 
-
-    /// <summary>
-    ///     MD5 hmac编码
-    /// </summary>
-    /// <param name="me">字符串</param>
-    /// <param name="key">密钥</param>
-    /// <param name="e">字符串使用的编码</param>
-    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
-    private static string Md5Hmac(this string me, string key, Encoding e)
-    {
-        using var md5Hmac = new HMACMD5(e.GetBytes(key));
-        return BitConverter.ToString(md5Hmac.ComputeHash(e.GetBytes(me)))
-                           .Replace("-", string.Empty)
-                           .ToLower(CultureInfo.CurrentCulture);
-    }
-
     /// <summary>
     ///     判断字符串是否为null或不存在子元素（如果为集合对象）；如果为空，返回指定的默认值，否则返回字符串本身
     /// </summary>
@@ -341,6 +359,17 @@ public static class StringExtensions
         return me.AsEnumerable().NullOrEmpty() ? defVal : me;
     }
 
+
+    /// <summary>
+    ///     null或空白字符
+    /// </summary>
+    /// <param name="me"></param>
+    /// <returns></returns>
+    public static bool NullOrWhiteSpace(this string me)
+    {
+        return string.IsNullOrWhiteSpace(me);
+    }
+
     /// <summary>
     ///     反序列化一个文件获得指定类型的数据对象
     /// </summary>
@@ -382,6 +411,21 @@ public static class StringExtensions
     }
 
 
+    /// <summary>
+    ///     对一个字符串进行sha1 hash运算
+    /// </summary>
+    /// <param name="me">字符串</param>
+    /// <param name="e">字符串使用的编码</param>
+    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
+    public static string Sha1(this string me, Encoding e)
+    {
+        using var sha1 = SHA1.Create();
+        return BitConverter.ToString(sha1.ComputeHash(e.GetBytes(me)))
+                           .Replace("-", string.Empty)
+                           .ToLower(CultureInfo.CurrentCulture);
+    }
+
+
     /// <summary>
     ///     截取指定长度的字符串，代替substring
     /// </summary>
@@ -427,15 +471,5 @@ public static class StringExtensions
     {
         return Uri.UnescapeDataString(me);
     }
-
-    public static int IpV4ToInt32(this string me)
-    {
-        return BitConverter.ToInt32(me.Split('.').Select(byte.Parse).Reverse().ToArray(), 0);
-    }
-
-
-    public static bool NullOrWhiteSpace(this string me)
-    {
-        return string.IsNullOrWhiteSpace(me);
-    }
 }
+

src/NSExt/Extensions/UriExtensions.cs

@@ -12,3 +12,6 @@ public static class UriExtensions
         return "//" + me.Authority + me.PathAndQuery;
     }
 }
+
+
+

src/NSExt/NSExt.csproj

@@ -8,8 +8,8 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0-rc.2.22472.3" />
+        <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0-rc.2.22472.3"/>
-        <PackageReference Include="Newtonsoft.Json" Version="13.0.2-beta2" />
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.2-beta2"/>
     </ItemGroup>