修改部分文件结构,完善第三方登陆功能

Infrastructure/Infrastructure.csproj

@@ -84,6 +84,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Response.cs" />
     <Compile Include="SessionHelper.cs" />
+    <Compile Include="StringExtensions.cs" />
     <Compile Include="UriUtil.cs" />
   </ItemGroup>
   <ItemGroup>

Infrastructure/StringExtensions.cs

@@ -0,0 +1,31 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Infrastructure
+{
+    public static class StringExtensions
+    {
+        public static string MaxSubstring(this string origin, int maxLength)
+        {
+            return origin.Length >= maxLength ? origin.Substring(0, maxLength) : origin;
+        }
+
+        public static string ToMd5(this string origin)
+        {
+            if (string.IsNullOrWhiteSpace(origin))
+            {
+                return string.Empty;
+            }
+
+            var md5Algorithm = MD5.Create();
+            var utf8Bytes = Encoding.UTF8.GetBytes(origin);
+            var md5Hash = md5Algorithm.ComputeHash(utf8Bytes);
+            var hexString = new StringBuilder();
+            foreach (var hexByte in md5Hash)
+            {
+                hexString.Append(hexByte.ToString("x2"));
+            }
+            return hexString.ToString();
+        }
+    }
+}