...

42 files changed, 895 insertions, 1549 deletions

diff --git a/ErrorResponseCodeGenerator/ErrorResponseCodeGenerator.csproj b/ErrorResponseCodeGenerator/ErrorResponseCodeGenerator.csproj
new file mode 100644
index 00000000..e77a1ba3
--- /dev/null
+++ b/ErrorResponseCodeGenerator/ErrorResponseCodeGenerator.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">

+

+  <PropertyGroup>

+    <OutputType>Exe</OutputType>

+    <TargetFramework>netcoreapp3.1</TargetFramework>

+  </PropertyGroup>

+

+  <ItemGroup>

+    <ProjectReference Include="..\Timeline.ErrorCodes\Timeline.ErrorCodes.csproj" />

+  </ItemGroup>

+

+</Project>

diff --git a/ErrorResponseCodeGenerator/Program.cs b/ErrorResponseCodeGenerator/Program.cs
new file mode 100644
index 00000000..cf021927
--- /dev/null
+++ b/ErrorResponseCodeGenerator/Program.cs
@@ -0,0 +1,62 @@
+using System;

+using System.Linq;

+using System.Reflection;

+

+namespace ErrorResponseCodeGenerator

+{

+    class Program

+    {

+        static void Main(string[] args)

+        {

+            var code = "";

+

+            void RecursiveAddErrorCode(Type type, bool root)

+            {

+                code += $@"

+        public static class {(root ? "ErrorResponse" : type.Name)}

+        {{

+";

+

+                foreach (var field in type.GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy)

+                    .Where(fi => fi.IsLiteral && !fi.IsInitOnly && fi.FieldType == typeof(int)))

+                {

+                    var path = type.FullName.Replace("+", ".").Replace("Timeline.Models.Http.ErrorCodes.", "") + "." + field.Name;

+

+                    code += $@"

+            public static CommonResponse {field.Name}(params object?[] formatArgs)

+            {{

+                return new CommonResponse({"ErrorCodes." + path}, string.Format({path.Replace(".", "_")}, formatArgs));

+            }}

+

+            public static CommonResponse CustomMessage_{field.Name}(string message, params object?[] formatArgs)

+            {{

+                return new CommonResponse({"ErrorCodes." + path}, string.Format(message, formatArgs));

+            }}

+";

+                }

+

+                foreach (var nestedType in type.GetNestedTypes())

+                {

+                    RecursiveAddErrorCode(nestedType, false);

+                }

+

+                code += @"

+        }

+";

+            }

+

+            RecursiveAddErrorCode(typeof(Timeline.Models.Http.ErrorCodes), true);

+

+            code = @"

+using static Timeline.Resources.Messages;

+

+namespace Timeline.Models.Http

+{

+$

+}

+".Replace("$", code);

+

+            Console.WriteLine(code);

+        }

+    }

+}

diff --git a/Timeline.ErrorCodes/ErrorCodes.cs b/Timeline.ErrorCodes/ErrorCodes.cs
new file mode 100644
index 00000000..730f42e0
--- /dev/null
+++ b/Timeline.ErrorCodes/ErrorCodes.cs
@@ -0,0 +1,65 @@
+namespace Timeline.Models.Http

+{

+    /// <summary>

+    /// All error code constants.

+    /// </summary>

+    /// <remarks>

+    /// Format: 1bbbccdd

+    /// </remarks>

+    public static class ErrorCodes

+    {

+        public static class Common

+        {

+            public const int InvalidModel = 1_000_0001;

+            public const int Forbid = 1_000_0002;

+

+            public static class Header

+            {

+                public const int IfNonMatch_BadFormat = 1_000_01_01;

+                public const int ContentType_Missing = 1_000_02_01;

+                public const int ContentLength_Missing = 1_000_03_01;

+                public const int ContentLength_Zero = 1_000_03_02;

+            }

+

+            public static class Content

+            {

+                public const int TooBig = 1_000_11_01;

+                public const int UnmatchedLength_Smaller = 1_000_11_02;

+                public const int UnmatchedLength_Bigger = 1_000_11_03;

+            }

+        }

+

+        public static class UserCommon

+        {

+            public const int NotExist = 1_001_0001;

+        }

+

+        public static class TokenController

+        {

+            public const int Create_BadCredential = 1_101_01_01;

+            public const int Verify_BadFormat = 1_101_02_01;

+            public const int Verify_UserNotExist = 1_101_02_02;

+            public const int Verify_OldVersion = 1_101_02_03;

+            public const int Verify_TimeExpired = 1_101_02_04;

+        }

+

+        public static class UserController

+        {

+            public const int ChangeUsername_Conflict = 1_102_01_01;

+            public const int ChangePassword_BadOldPassword = 1_102_02_01;

+        }

+

+        public static class UserAvatar

+        {

+            public const int BadFormat_CantDecode = 1_103_00_01;

+            public const int BadFormat_UnmatchedFormat = 1_103_00_02;

+            public const int BadFormat_BadSize = 1_103_00_03;

+        }

+

+        public static class TimelineController

+        {

+            public const int PostOperationDelete_NotExist = 1_104_01_01;

+        }

+    }

+}

+

diff --git a/Timeline.ErrorCodes/Timeline.ErrorCodes.csproj b/Timeline.ErrorCodes/Timeline.ErrorCodes.csproj
new file mode 100644
index 00000000..01ca2568
--- /dev/null
+++ b/Timeline.ErrorCodes/Timeline.ErrorCodes.csproj
@@ -0,0 +1,7 @@
+<Project Sdk="Microsoft.NET.Sdk">

+

+  <PropertyGroup>

+    <TargetFramework>netcoreapp3.1</TargetFramework>

+  </PropertyGroup>

+

+</Project>

diff --git a/Timeline.Tests/Controllers/TokenControllerTest.cs b/Timeline.Tests/Controllers/TokenControllerTest.cs
index 238fc237..371884bb 100644
--- a/Timeline.Tests/Controllers/TokenControllerTest.cs
+++ b/Timeline.Tests/Controllers/TokenControllerTest.cs
@@ -10,7 +10,7 @@ using Timeline.Models.Http;
 using Timeline.Services;

 using Timeline.Tests.Helpers;

 using Xunit;

-using static Timeline.ErrorCodes.Http.Token;

+using static Timeline.ErrorCodes.Token;

 

 namespace Timeline.Tests.Controllers

 {

@@ -98,7 +98,7 @@ namespace Timeline.Tests.Controllers
 

         public static IEnumerable<object[]> Verify_BadRequest_Data()

         {

-            yield return new object[] { new JwtVerifyException(JwtVerifyException.ErrorCodes.Expired), Verify.Expired };

+            yield return new object[] { new JwtVerifyException(JwtVerifyException.ErrorCodes.Expired), Verify.TimeExpired };

             yield return new object[] { new JwtVerifyException(JwtVerifyException.ErrorCodes.IdClaimBadFormat), Verify.BadFormat };

             yield return new object[] { new JwtVerifyException(JwtVerifyException.ErrorCodes.OldVersion), Verify.OldVersion };

             yield return new object[] { new UserNotExistException(), Verify.UserNotExist };

diff --git a/Timeline.Tests/Controllers/UserControllerTest.cs b/Timeline.Tests/Controllers/UserControllerTest.cs
index a5ca7a2b..7a6541fb 100644
--- a/Timeline.Tests/Controllers/UserControllerTest.cs
+++ b/Timeline.Tests/Controllers/UserControllerTest.cs
@@ -13,7 +13,8 @@ using Timeline.Models.Http;
 using Timeline.Services;

 using Timeline.Tests.Helpers;

 using Xunit;

-using static Timeline.ErrorCodes.Http.User;

+using static Timeline.ErrorCodes.User;

+using static Timeline.ErrorCodes.UserCommon;

 

 namespace Timeline.Tests.Controllers

 {

@@ -61,7 +62,7 @@ namespace Timeline.Tests.Controllers
             var action = await _controller.Get(username);

             action.Result.Should().BeAssignableTo<NotFoundObjectResult>()

                 .Which.Value.Should().BeAssignableTo<CommonResponse>()

-                .Which.Code.Should().Be(Get.NotExist);

+                .Which.Code.Should().Be(UserNotExist);

         }

 

         [Theory]

@@ -114,7 +115,7 @@ namespace Timeline.Tests.Controllers
             }, username);

             action.Should().BeAssignableTo<NotFoundObjectResult>()

                 .Which.Value.Should().BeAssignableTo<CommonResponse>()

-                .Which.Code.Should().Be(Patch.NotExist);

+                .Which.Code.Should().Be(UserNotExist);

         }

 

         [Fact]

@@ -154,8 +155,8 @@ namespace Timeline.Tests.Controllers
         }

 

         [Theory]

-        [InlineData(typeof(UserNotExistException), Op.ChangeUsername.NotExist)]

-        [InlineData(typeof(UsernameConfictException), Op.ChangeUsername.AlreadyExist)]

+        [InlineData(typeof(UserNotExistException), UserNotExist)]

+        [InlineData(typeof(UsernameConfictException), ChangeUsername_Conflict)]

         public async Task Op_ChangeUsername_Failure(Type exceptionType, int code)

         {

             const string oldUsername = "aaa";

@@ -212,7 +213,7 @@ namespace Timeline.Tests.Controllers
             var action = await _controller.ChangePassword(new ChangePasswordRequest { OldPassword = oldPassword, NewPassword = newPassword });

             action.Should().BeAssignableTo<BadRequestObjectResult>()

                 .Which.Value.Should().BeAssignableTo<CommonResponse>()

-                .Which.Code.Should().Be(Op.ChangePassword.BadOldPassword);

+                .Which.Code.Should().Be(ChangePassword_BadOldPassword);

         }

     }

 }

diff --git a/Timeline.sln b/Timeline.sln
index 055989e9..0e01871a 100644
--- a/Timeline.sln
+++ b/Timeline.sln
@@ -1,10 +1,14 @@
 Microsoft Visual Studio Solution File, Format Version 12.00

-# Visual Studio 15

-VisualStudioVersion = 15.0.28307.271

+# Visual Studio Version 16

+VisualStudioVersion = 16.0.29709.97

 MinimumVisualStudioVersion = 10.0.40219.1

 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Timeline", "Timeline\Timeline.csproj", "{A34D323C-5233-4754-B14F-4819CE9C27CA}"

 EndProject

-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Timeline.Tests", "Timeline.Tests\Timeline.Tests.csproj", "{3D76D578-37BC-43C2-97BF-9C6DD3825F10}"

+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Timeline.Tests", "Timeline.Tests\Timeline.Tests.csproj", "{3D76D578-37BC-43C2-97BF-9C6DD3825F10}"

+EndProject

+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ErrorResponseCodeGenerator", "ErrorResponseCodeGenerator\ErrorResponseCodeGenerator.csproj", "{F325F802-75DE-4527-A299-F668281B0E4D}"

+EndProject

+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Timeline.ErrorCodes", "Timeline.ErrorCodes\Timeline.ErrorCodes.csproj", "{1044E3B0-1010-47CA-956E-B6E8FE87055B}"

 EndProject

 Global

 	GlobalSection(SolutionConfigurationPlatforms) = preSolution

@@ -20,6 +24,14 @@ Global
 		{3D76D578-37BC-43C2-97BF-9C6DD3825F10}.Debug|Any CPU.Build.0 = Debug|Any CPU

 		{3D76D578-37BC-43C2-97BF-9C6DD3825F10}.Release|Any CPU.ActiveCfg = Release|Any CPU

 		{3D76D578-37BC-43C2-97BF-9C6DD3825F10}.Release|Any CPU.Build.0 = Release|Any CPU

+		{F325F802-75DE-4527-A299-F668281B0E4D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

+		{F325F802-75DE-4527-A299-F668281B0E4D}.Debug|Any CPU.Build.0 = Debug|Any CPU

+		{F325F802-75DE-4527-A299-F668281B0E4D}.Release|Any CPU.ActiveCfg = Release|Any CPU

+		{F325F802-75DE-4527-A299-F668281B0E4D}.Release|Any CPU.Build.0 = Release|Any CPU

+		{1044E3B0-1010-47CA-956E-B6E8FE87055B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU

+		{1044E3B0-1010-47CA-956E-B6E8FE87055B}.Debug|Any CPU.Build.0 = Debug|Any CPU

+		{1044E3B0-1010-47CA-956E-B6E8FE87055B}.Release|Any CPU.ActiveCfg = Release|Any CPU

+		{1044E3B0-1010-47CA-956E-B6E8FE87055B}.Release|Any CPU.Build.0 = Release|Any CPU

 	EndGlobalSection

 	GlobalSection(SolutionProperties) = preSolution

 		HideSolutionNode = FALSE

diff --git a/Timeline/Controllers/PersonalTimelineController.cs b/Timeline/Controllers/PersonalTimelineController.cs
index c864ed39..e1e3aba0 100644
--- a/Timeline/Controllers/PersonalTimelineController.cs
+++ b/Timeline/Controllers/PersonalTimelineController.cs
@@ -12,24 +12,7 @@ using Timeline.Models.Http;
 using Timeline.Models.Validation;

 using Timeline.Services;

 using static Timeline.Resources.Controllers.TimelineController;

-

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static class Timeline // ccc = 004

-            {

-                public const int PostListGetForbid = 10040101;

-                public const int PostOperationCreateForbid = 10040102;

-                public const int PostOperationDeleteForbid = 10040103;

-                public const int PostOperationDeleteNotExist = 10040201;

-                public const int ChangeMemberUserNotExist = 10040301;

-            }

-        }

-    }

-}

+using static Timeline.Resources.Messages;

 

 namespace Timeline.Controllers

 {

@@ -80,8 +63,7 @@ namespace Timeline.Controllers
         {

             if (!IsAdmin() && !await _service.HasReadPermission(username, GetAuthUsername()))

             {

-                return StatusCode(StatusCodes.Status403Forbidden,

-                    new CommonResponse(ErrorCodes.Http.Timeline.PostListGetForbid, MessagePostListGetForbid));

+                return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());

             }

 

             return await _service.GetPosts(username);

@@ -94,8 +76,7 @@ namespace Timeline.Controllers
         {

             if (!IsAdmin() && !await _service.IsMemberOf(username, GetAuthUsername()!))

             {

-                return StatusCode(StatusCodes.Status403Forbidden,

-                    new CommonResponse(ErrorCodes.Http.Timeline.PostOperationCreateForbid, MessagePostOperationCreateForbid));

+                return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());

             }

 

             var res = await _service.CreatePost(username, User.Identity.Name!, body.Content, body.Time);

@@ -112,16 +93,13 @@ namespace Timeline.Controllers
                 var postId = body.Id!.Value;

                 if (!IsAdmin() && !await _service.HasPostModifyPermission(username, postId, GetAuthUsername()!))

                 {

-                    return StatusCode(StatusCodes.Status403Forbidden,

-                        new CommonResponse(ErrorCodes.Http.Timeline.PostOperationDeleteForbid, MessagePostOperationCreateForbid));

+                    return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());

                 }

                 await _service.DeletePost(username, postId);

             }

             catch (TimelinePostNotExistException)

             {

-                return BadRequest(new CommonResponse(

-                    ErrorCodes.Http.Timeline.PostOperationDeleteNotExist,

-                    MessagePostOperationDeleteNotExist));

+                return BadRequest(ErrorResponse.TimelineController.PostOperationDelete_NotExist());

             }

             return Ok();

         }

@@ -151,13 +129,13 @@ namespace Timeline.Controllers
             {

                 if (e.InnerException is UsernameBadFormatException)

                 {

-                    return BadRequest(CommonResponse.InvalidModel(

-                        string.Format(CultureInfo.CurrentCulture, MessageMemberUsernameBadFormat, e.Index, e.Operation)));

+                    return BadRequest(ErrorResponse.Common.CustomMessage_InvalidModel(

+                        TimelineController_ChangeMember_UsernameBadFormat, e.Index, e.Operation));

                 }

                 else if (e.InnerException is UserNotExistException)

                 {

-                    return BadRequest(new CommonResponse(ErrorCodes.Http.Timeline.ChangeMemberUserNotExist,

-                        string.Format(CultureInfo.CurrentCulture, MessageMemberUserNotExist, e.Index, e.Operation)));

+                    return BadRequest(ErrorResponse.Common.CustomMessage_InvalidModel(

+                        TimelineController_ChangeMember_UserNotExist, e.Index, e.Operation));

                 }

 

                 _logger.LogError(e, LogUnknownTimelineMemberOperationUserException);

diff --git a/Timeline/Controllers/TokenController.cs b/Timeline/Controllers/TokenController.cs
index 01f4778f..c360a109 100644
--- a/Timeline/Controllers/TokenController.cs
+++ b/Timeline/Controllers/TokenController.cs
@@ -10,31 +10,6 @@ using Timeline.Models.Http;
 using Timeline.Services;

 using static Timeline.Resources.Controllers.TokenController;

 

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static class Token // bbb = 001

-            {

-                public static class Create // cc = 01

-                {

-                    public const int BadCredential = 10010101;

-                }

-

-                public static class Verify // cc = 02

-                {

-                    public const int BadFormat = 10010201;

-                    public const int UserNotExist = 10010202;

-                    public const int OldVersion = 10010203;

-                    public const int Expired = 10010204;

-                }

-            }

-        }

-    }

-}

-

 namespace Timeline.Controllers

 {

     [Route("token")]

@@ -87,16 +62,12 @@ namespace Timeline.Controllers
             catch (UserNotExistException e)

             {

                 LogFailure(LogUserNotExist, e);

-                return BadRequest(new CommonResponse(

-                    ErrorCodes.Http.Token.Create.BadCredential,

-                    ErrorBadCredential));

+                return BadRequest(ErrorResponse.TokenController.Create_BadCredential());

             }

             catch (BadPasswordException e)

             {

                 LogFailure(LogBadPassword, e);

-                return BadRequest(new CommonResponse(

-                    ErrorCodes.Http.Token.Create.BadCredential,

-                     ErrorBadCredential));

+                return BadRequest(ErrorResponse.TokenController.Create_BadCredential());

             }

         }

 

@@ -128,31 +99,28 @@ namespace Timeline.Controllers
                 if (e.ErrorCode == JwtVerifyException.ErrorCodes.Expired)

                 {

                     var innerException = e.InnerException as SecurityTokenExpiredException;

-                    LogFailure(LogVerifyExpire, e, ("Expires", innerException?.Expires),

+                    LogFailure(LogVerifyExpire, e, ("Expires", innerException.Expires),

                         ("Current Time", _clock.GetCurrentTime()));

-                    return BadRequest(new CommonResponse(

-                        ErrorCodes.Http.Token.Verify.Expired, ErrorVerifyExpire));

+                    return BadRequest(ErrorResponse.TokenController.Verify_TimeExpired());

                 }

                 else if (e.ErrorCode == JwtVerifyException.ErrorCodes.OldVersion)

                 {

                     var innerException = e.InnerException as JwtBadVersionException;

                     LogFailure(LogVerifyOldVersion, e,

-                        ("Token Version", innerException?.TokenVersion), ("Required Version", innerException?.RequiredVersion));

-                    return BadRequest(new CommonResponse(

-                        ErrorCodes.Http.Token.Verify.OldVersion, ErrorVerifyOldVersion));

+                        ("Token Version", innerException.TokenVersion),

+                        ("Required Version", innerException?.RequiredVersion));

+                    return BadRequest(ErrorResponse.TokenController.Verify_OldVersion());

                 }

                 else

                 {

                     LogFailure(LogVerifyBadFormat, e);

-                    return BadRequest(new CommonResponse(

-                        ErrorCodes.Http.Token.Verify.BadFormat, ErrorVerifyBadFormat));

+                    return BadRequest(ErrorResponse.TokenController.Verify_BadFormat());

                 }

             }

             catch (UserNotExistException e)

             {

                 LogFailure(LogVerifyUserNotExist, e);

-                return BadRequest(new CommonResponse(

-                    ErrorCodes.Http.Token.Verify.UserNotExist, ErrorVerifyUserNotExist));

+                return BadRequest(ErrorResponse.TokenController.Verify_UserNotExist());

             }

         }

     }

diff --git a/Timeline/Controllers/UserAvatarController.cs b/Timeline/Controllers/UserAvatarController.cs
index 7625f962..b4a6d8fd 100644
--- a/Timeline/Controllers/UserAvatarController.cs
+++ b/Timeline/Controllers/UserAvatarController.cs
@@ -14,39 +14,6 @@ using Timeline.Models.Validation;
 using Timeline.Services;

 using static Timeline.Resources.Controllers.UserAvatarController;

 

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static class UserAvatar // bbb = 003

-            {

-                public static class Get // cc = 01

-                {

-                    public const int UserNotExist = 10030101;

-                }

-

-                public static class Put // cc = 02

-                {

-                    public const int UserNotExist = 10030201;

-                    public const int Forbid = 10030202;

-                    public const int BadFormat_CantDecode = 10030203;

-                    public const int BadFormat_UnmatchedFormat = 10030204;

-                    public const int BadFormat_BadSize = 10030205;

-

-                }

-

-                public static class Delete // cc = 03

-                {

-                    public const int UserNotExist = 10030301;

-                    public const int Forbid = 10030302;

-                }

-            }

-        }

-    }

-}

-

 namespace Timeline.Controllers

 {

     [ApiController]

@@ -79,7 +46,7 @@ namespace Timeline.Controllers
                     {

                         _logger.LogInformation(Log.Format(LogGetBadIfNoneMatch,

                             ("Username", username), ("If-None-Match", value)));

-                        return BadRequest(HeaderErrorResponse.BadIfNonMatch());

+                        return BadRequest(ErrorResponse.Common.Header.IfNonMatch_BadFormat());

                     }

 

                     if (eTagList.FirstOrDefault(e => e.Equals(eTag)) != null)

@@ -99,7 +66,7 @@ namespace Timeline.Controllers
             catch (UserNotExistException e)

             {

                 _logger.LogInformation(e, Log.Format(LogGetUserNotExist, ("Username", username)));

-                return NotFound(new CommonResponse(ErrorCodes.Http.UserAvatar.Get.UserNotExist, ErrorGetUserNotExist));

+                return NotFound(ErrorResponse.UserController.ChangePassword_BadOldPassword());

             }

         }

 

@@ -111,14 +78,13 @@ namespace Timeline.Controllers
         {

             var contentLength = Request.ContentLength!.Value;

             if (contentLength > 1000 * 1000 * 10)

-                return BadRequest(ContentErrorResponse.TooBig("10MB"));

+                return BadRequest(ErrorResponse.Common.Content.TooBig("10MB"));

 

             if (!User.IsAdministrator() && User.Identity.Name != username)

             {

                 _logger.LogInformation(Log.Format(LogPutForbid,

                     ("Operator Username", User.Identity.Name), ("Username To Put Avatar", username)));

-                return StatusCode(StatusCodes.Status403Forbidden,

-                    new CommonResponse(ErrorCodes.Http.UserAvatar.Put.Forbid, ErrorPutForbid));

+                return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());

             }

 

             try

@@ -127,11 +93,11 @@ namespace Timeline.Controllers
                 var bytesRead = await Request.Body.ReadAsync(data);

 

                 if (bytesRead != contentLength)

-                    return BadRequest(ContentErrorResponse.UnmatchedLength_Smaller());

+                    return BadRequest(ErrorResponse.Common.Content.UnmatchedLength_Smaller());

 

                 var extraByte = new byte[1];

                 if (await Request.Body.ReadAsync(extraByte) != 0)

-                    return BadRequest(ContentErrorResponse.UnmatchedLength_Bigger());

+                    return BadRequest(ErrorResponse.Common.Content.UnmatchedLength_Bigger());

 

                 await _service.SetAvatar(username, new Avatar

                 {

@@ -146,24 +112,19 @@ namespace Timeline.Controllers
             catch (UserNotExistException e)

             {

                 _logger.LogInformation(e, Log.Format(LogPutUserNotExist, ("Username", username)));

-                return BadRequest(new CommonResponse(ErrorCodes.Http.UserAvatar.Put.UserNotExist, ErrorPutUserNotExist));

+                return BadRequest(ErrorResponse.UserController.ChangePassword_BadOldPassword());

             }

             catch (AvatarFormatException e)

             {

-                var (code, message) = e.Error switch

+                _logger.LogInformation(e, Log.Format(LogPutUserBadFormat, ("Username", username)));

+                return BadRequest(e.Error switch

                 {

-                    AvatarFormatException.ErrorReason.CantDecode =>

-                        (ErrorCodes.Http.UserAvatar.Put.BadFormat_CantDecode, ErrorPutBadFormatCantDecode),

-                    AvatarFormatException.ErrorReason.UnmatchedFormat =>

-                       (ErrorCodes.Http.UserAvatar.Put.BadFormat_UnmatchedFormat, ErrorPutBadFormatUnmatchedFormat),

-                    AvatarFormatException.ErrorReason.BadSize =>

-                       (ErrorCodes.Http.UserAvatar.Put.BadFormat_BadSize, ErrorPutBadFormatBadSize),

+                    AvatarFormatException.ErrorReason.CantDecode => ErrorResponse.UserAvatar.BadFormat_CantDecode(),

+                    AvatarFormatException.ErrorReason.UnmatchedFormat => ErrorResponse.UserAvatar.BadFormat_UnmatchedFormat(),

+                    AvatarFormatException.ErrorReason.BadSize => ErrorResponse.UserAvatar.BadFormat_BadSize(),

                     _ =>

                         throw new Exception(ExceptionUnknownAvatarFormatError)

-                };

-

-                _logger.LogInformation(e, Log.Format(LogPutUserBadFormat, ("Username", username)));

-                return BadRequest(new CommonResponse(code, message));

+                });

             }

         }

 

@@ -173,23 +134,20 @@ namespace Timeline.Controllers
         {

             if (!User.IsAdministrator() && User.Identity.Name != username)

             {

-                _logger.LogInformation(Log.Format(LogPutUserBadFormat,

+                _logger.LogInformation(Log.Format(LogDeleteForbid,

                     ("Operator Username", User.Identity.Name), ("Username To Delete Avatar", username)));

-                return StatusCode(StatusCodes.Status403Forbidden,

-                    new CommonResponse(ErrorCodes.Http.UserAvatar.Delete.Forbid, ErrorDeleteForbid));

+                return StatusCode(StatusCodes.Status403Forbidden, ErrorResponse.Common.Forbid());

             }

 

             try

             {

                 await _service.SetAvatar(username, null);

-

-                _logger.LogInformation(Log.Format(LogDeleteSuccess, ("Username", username)));

                 return Ok();

             }

             catch (UserNotExistException e)

             {

                 _logger.LogInformation(e, Log.Format(LogDeleteNotExist, ("Username", username)));

-                return BadRequest(new CommonResponse(ErrorCodes.Http.UserAvatar.Delete.UserNotExist, ErrorDeleteUserNotExist));

+                return BadRequest(ErrorResponse.UserCommon.NotExist());

             }

         }

     }

diff --git a/Timeline/Controllers/UserController.cs b/Timeline/Controllers/UserController.cs
index 0d950cd7..956865dc 100644
--- a/Timeline/Controllers/UserController.cs
+++ b/Timeline/Controllers/UserController.cs
@@ -1,7 +1,7 @@
 using Microsoft.AspNetCore.Authorization;

 using Microsoft.AspNetCore.Mvc;

 using Microsoft.Extensions.Logging;

-using System.Globalization;

+using System;

 using System.Threading.Tasks;

 using Timeline.Auth;

 using Timeline.Helpers;

@@ -11,43 +11,6 @@ using Timeline.Models.Validation;
 using Timeline.Services;

 using static Timeline.Resources.Controllers.UserController;

 

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static class User // bbb = 002

-            {

-                public static class Get // cc = 01

-                {

-                    public const int NotExist = 10020101; // dd = 01

-                }

-

-                public static class Patch // cc = 03

-                {

-                    public const int NotExist = 10020301; // dd = 01

-                }

-

-                public static class Op // cc = 1x

-                {

-                    public static class ChangeUsername // cc = 11

-                    {

-                        public const int NotExist = 10021101; // dd = 01

-                        public const int AlreadyExist = 10021102; // dd = 02

-                    }

-

-                    public static class ChangePassword // cc = 12

-                    {

-                        public const int BadOldPassword = 10021201; // dd = 01

-                    }

-                }

-

-            }

-        }

-    }

-}

-

 namespace Timeline.Controllers

 {

     [ApiController]

@@ -76,7 +39,7 @@ namespace Timeline.Controllers
             if (user == null)

             {

                 _logger.LogInformation(Log.Format(LogGetUserNotExist, ("Username", username)));

-                return NotFound(new CommonResponse(ErrorCodes.Http.User.Get.NotExist, ErrorGetUserNotExist));

+                return NotFound(ErrorResponse.UserCommon.NotExist());

             }

             return Ok(user);

         }

@@ -88,13 +51,11 @@ namespace Timeline.Controllers
             switch (result)

             {

                 case PutResult.Create:

-                    _logger.LogInformation(Log.Format(LogPutCreate, ("Username", username)));

                     return CreatedAtAction("Get", new { username }, CommonPutResponse.Create());

                 case PutResult.Modify:

-                    _logger.LogInformation(Log.Format(LogPutModify, ("Username", username)));

                     return Ok(CommonPutResponse.Modify());

                 default:

-                    throw new InvalidBranchException();

+                    throw new Exception(ExceptionUnknownPutResult);

             }

         }

 

@@ -109,7 +70,7 @@ namespace Timeline.Controllers
             catch (UserNotExistException e)

             {

                 _logger.LogInformation(e, Log.Format(LogPatchUserNotExist, ("Username", username)));

-                return NotFound(new CommonResponse(ErrorCodes.Http.User.Patch.NotExist, ErrorPatchUserNotExist));

+                return NotFound(ErrorResponse.UserCommon.NotExist());

             }

         }

 

@@ -119,12 +80,10 @@ namespace Timeline.Controllers
             try

             {

                 await _userService.DeleteUser(username);

-                _logger.LogInformation(Log.Format(LogDeleteDelete, ("Username", username)));

                 return Ok(CommonDeleteResponse.Delete());

             }

-            catch (UserNotExistException e)

+            catch (UserNotExistException)

             {

-                _logger.LogInformation(e, Log.Format(LogDeleteNotExist, ("Username", username)));

                 return Ok(CommonDeleteResponse.NotExist());

             }

         }

@@ -135,22 +94,19 @@ namespace Timeline.Controllers
             try

             {

                 await _userService.ChangeUsername(request.OldUsername, request.NewUsername);

-                _logger.LogInformation(Log.Format(LogChangeUsernameSuccess,

-                    ("Old Username", request.OldUsername), ("New Username", request.NewUsername)));

                 return Ok();

             }

             catch (UserNotExistException e)

             {

                 _logger.LogInformation(e, Log.Format(LogChangeUsernameNotExist,

                     ("Old Username", request.OldUsername), ("New Username", request.NewUsername)));

-                return BadRequest(new CommonResponse(ErrorCodes.Http.User.Op.ChangeUsername.NotExist,

-                    string.Format(CultureInfo.CurrentCulture, ErrorChangeUsernameNotExist, request.OldUsername)));

+                return BadRequest(ErrorResponse.UserCommon.NotExist());

             }

             catch (UsernameConfictException e)

             {

-                _logger.LogInformation(e, Log.Format(LogChangeUsernameAlreadyExist,

+                _logger.LogInformation(e, Log.Format(LogChangeUsernameConflict,

                     ("Old Username", request.OldUsername), ("New Username", request.NewUsername)));

-                return BadRequest(new CommonResponse(ErrorCodes.Http.User.Op.ChangeUsername.AlreadyExist, ErrorChangeUsernameAlreadyExist));

+                return BadRequest(ErrorResponse.UserController.ChangeUsername_Conflict());

             }

             // there is no need to catch bad format exception because it is already checked in model validation.

         }

@@ -161,15 +117,13 @@ namespace Timeline.Controllers
             try

             {

                 await _userService.ChangePassword(User.Identity.Name!, request.OldPassword, request.NewPassword);

-                _logger.LogInformation(Log.Format(LogChangePasswordSuccess, ("Username", User.Identity.Name)));

                 return Ok();

             }

             catch (BadPasswordException e)

             {

                 _logger.LogInformation(e, Log.Format(LogChangePasswordBadPassword,

                     ("Username", User.Identity.Name), ("Old Password", request.OldPassword)));

-                return BadRequest(new CommonResponse(ErrorCodes.Http.User.Op.ChangePassword.BadOldPassword,

-                    ErrorChangePasswordBadPassword));

+                return BadRequest(ErrorResponse.UserController.ChangePassword_BadOldPassword());

             }

             // User can't be non-existent or the token is bad. 

         }

diff --git a/Timeline/ErrorCodes.cs b/Timeline/ErrorCodes.cs
deleted file mode 100644
index c246953b..00000000
--- a/Timeline/ErrorCodes.cs
+++ /dev/null
@@ -1,35 +0,0 @@
-namespace Timeline

-{

-    /// <summary>

-    /// All error code constants.

-    /// </summary>

-    /// <remarks>

-    /// Scheme:

-    /// abbbccdd

-    /// </remarks>

-    public static partial class ErrorCodes

-    {

-        public static partial class Http // a = 1 

-        {

-            public static class Common // bbb = 000

-            {

-                public const int InvalidModel = 10000000;

-

-                public static class Header // cc = 0x

-                {

-                    public static class IfNonMatch // cc = 01

-                    {

-                        public const int BadFormat = 10000101;

-                    }

-                }

-

-                public static class Content // cc = 11

-                {

-                    public const int TooBig = 10001101;

-                    public const int UnmatchedLength_Smaller = 10001102;

-                    public const int UnmatchedLength_Bigger = 10001103;

-                }

-            }

-        }

-    }

-}

diff --git a/Timeline/Filters/Header.cs b/Timeline/Filters/Header.cs
index f5fb16aa..843a619d 100644
--- a/Timeline/Filters/Header.cs
+++ b/Timeline/Filters/Header.cs
@@ -1,72 +1,23 @@
 using Microsoft.AspNetCore.Mvc;

 using Microsoft.AspNetCore.Mvc.Filters;

 using Timeline.Models.Http;

-using static Timeline.Resources.Filters;

-

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static partial class Filter // bxx = 1xx

-            {

-                public static partial class Header // bbb = 100

-                {

-                    public static class ContentType // cc = 01

-                    {

-                        public const int Missing = 11000101; // dd = 01

-                    }

-

-                    public static class ContentLength // cc = 02

-                    {

-                        public const int Missing = 11000201; // dd = 01

-                        public const int Zero = 11000202; // dd = 02

-                    }

-                }

-            }

-

-        }

-    }

-}

 

 namespace Timeline.Filters

 {

     public class RequireContentTypeAttribute : ActionFilterAttribute

     {

-        internal static CommonResponse CreateResponse()

-        {

-            return new CommonResponse(

-                ErrorCodes.Http.Filter.Header.ContentType.Missing,

-                MessageHeaderContentTypeMissing);

-        }

-

         [System.Diagnostics.CodeAnalysis.SuppressMessage("Design", "CA1062:Validate arguments of public methods")]

         public override void OnActionExecuting(ActionExecutingContext context)

         {

             if (context.HttpContext.Request.ContentType == null)

             {

-                context.Result = new BadRequestObjectResult(CreateResponse());

+                context.Result = new BadRequestObjectResult(ErrorResponse.Common.Header.ContentType_Missing());

             }

         }

     }

 

     public class RequireContentLengthAttribute : ActionFilterAttribute

     {

-        internal static CommonResponse CreateMissingResponse()

-        {

-            return new CommonResponse(

-                ErrorCodes.Http.Filter.Header.ContentLength.Missing,

-                MessageHeaderContentLengthMissing);

-        }

-

-        internal static CommonResponse CreateZeroResponse()

-        {

-            return new CommonResponse(

-                ErrorCodes.Http.Filter.Header.ContentLength.Zero,

-                MessageHeaderContentLengthZero);

-        }

-

         public RequireContentLengthAttribute()

         : this(true)

         {

@@ -85,13 +36,13 @@ namespace Timeline.Filters
         {

             if (context.HttpContext.Request.ContentLength == null)

             {

-                context.Result = new BadRequestObjectResult(CreateMissingResponse());

+                context.Result = new BadRequestObjectResult(ErrorResponse.Common.Header.ContentLength_Missing());

                 return;

             }

 

             if (RequireNonZero && context.HttpContext.Request.ContentLength.Value == 0)

             {

-                context.Result = new BadRequestObjectResult(CreateZeroResponse());

+                context.Result = new BadRequestObjectResult(ErrorResponse.Common.Header.ContentLength_Zero());

                 return;

             }

         }

diff --git a/Timeline/Filters/Timeline.cs b/Timeline/Filters/Timeline.cs
index 7859d409..bc142db0 100644
--- a/Timeline/Filters/Timeline.cs
+++ b/Timeline/Filters/Timeline.cs
@@ -2,25 +2,6 @@
 using Microsoft.AspNetCore.Mvc.Filters;

 using Timeline.Models.Http;

 using Timeline.Services;

-using static Timeline.Resources.Filters;

-

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static partial class Filter // bxx = 1xx

-            {

-                public static class Timeline // bbb = 102

-                {

-                    public const int UserNotExist = 11020101;

-                    public const int NameNotExist = 11020102;

-                }

-            }

-        }

-    }

-}

 

 namespace Timeline.Filters

 {

@@ -33,13 +14,11 @@ namespace Timeline.Filters
             {

                 if (e.InnerException is UserNotExistException)

                 {

-                    context.Result = new BadRequestObjectResult(

-                        new CommonResponse(ErrorCodes.Http.Filter.Timeline.UserNotExist, MessageTimelineNotExistUser));

+                    context.Result = new BadRequestObjectResult(ErrorResponse.UserCommon.NotExist());

                 }

                 else

                 {

-                    context.Result = new BadRequestObjectResult(

-                        new CommonResponse(ErrorCodes.Http.Filter.Timeline.NameNotExist, MessageTimelineNotExist));

+                    throw new System.NotImplementedException();

                 }

             }

         }

diff --git a/Timeline/Filters/User.cs b/Timeline/Filters/User.cs
index 16c76750..12ed6155 100644
--- a/Timeline/Filters/User.cs
+++ b/Timeline/Filters/User.cs
@@ -9,25 +9,6 @@ using Timeline.Models.Http;
 using Timeline.Services;

 using static Timeline.Resources.Filters;

 

-namespace Timeline

-{

-    public static partial class ErrorCodes

-    {

-        public static partial class Http

-        {

-            public static partial class Filter // bxx = 1xx

-            {

-                public static class User // bbb = 101

-                {

-                    public const int NotExist = 11010101;

-

-                    public const int NotSelfOrAdminForbid = 11010201;

-                }

-            }

-        }

-    }

-}

-

 namespace Timeline.Filters

 {

     public class SelfOrAdminAttribute : ActionFilterAttribute

@@ -51,8 +32,7 @@ namespace Timeline.Filters
                 {

                     if (!user.IsAdministrator() && user.Identity.Name != username)

                     {

-                        context.Result = new ObjectResult(

-                            new CommonResponse(ErrorCodes.Http.Filter.User.NotSelfOrAdminForbid, MessageSelfOrAdminForbid))

+                        context.Result = new ObjectResult(ErrorResponse.Common.Forbid())

                         { StatusCode = StatusCodes.Status403Forbidden };

                     }

                 }

@@ -76,7 +56,7 @@ namespace Timeline.Filters
         {

             if (context.Exception is UserNotExistException)

             {

-                var body = new CommonResponse(ErrorCodes.Http.Filter.User.NotExist, MessageUserNotExist);

+                var body = ErrorResponse.UserCommon.NotExist();

 

                 if (context.HttpContext.Request.Method == "GET")

                     context.Result = new NotFoundObjectResult(body);

diff --git a/Timeline/Helpers/InvalidModelResponseFactory.cs b/Timeline/Helpers/InvalidModelResponseFactory.cs
index 643c99ac..71ee44a9 100644
--- a/Timeline/Helpers/InvalidModelResponseFactory.cs
+++ b/Timeline/Helpers/InvalidModelResponseFactory.cs
@@ -20,7 +20,7 @@ namespace Timeline.Helpers
                     messageBuilder.AppendLine(error.ErrorMessage);

                 }

 

-            return new BadRequestObjectResult(CommonResponse.InvalidModel(messageBuilder.ToString()));

+            return new BadRequestObjectResult(ErrorResponse.Common.CustomMessage_InvalidModel(messageBuilder.ToString()));

         }

     }

 }

diff --git a/Timeline/InvalidBranchException.cs b/Timeline/InvalidBranchException.cs
deleted file mode 100644
index 32937c5d..00000000
--- a/Timeline/InvalidBranchException.cs
+++ /dev/null
@@ -1,16 +0,0 @@
-using System;

-

-namespace Timeline

-{

-

-    [Serializable]

-    public class InvalidBranchException : Exception

-    {

-        public InvalidBranchException() : base(Resources.Common.ExceptionInvalidBranch) { }

-        public InvalidBranchException(string message) : base(message) { }

-        public InvalidBranchException(string message, Exception inner) : base(message, inner) { }

-        protected InvalidBranchException(

-          System.Runtime.Serialization.SerializationInfo info,

-          System.Runtime.Serialization.StreamingContext context) : base(info, context) { }

-    }

-}

diff --git a/Timeline/Models/Http/Common.cs b/Timeline/Models/Http/Common.cs
index d1e95397..a9fc8a79 100644
--- a/Timeline/Models/Http/Common.cs
+++ b/Timeline/Models/Http/Common.cs
@@ -1,15 +1,9 @@
-using System.Globalization;

 using static Timeline.Resources.Models.Http.Common;

 

 namespace Timeline.Models.Http

 {

     public class CommonResponse

     {

-        internal static CommonResponse InvalidModel(string message)

-        {

-            return new CommonResponse(ErrorCodes.Http.Common.InvalidModel, message);

-        }

-

         public CommonResponse()

         {

 

@@ -25,33 +19,6 @@ namespace Timeline.Models.Http
         public string? Message { get; set; }

     }

 

-    internal static class HeaderErrorResponse

-    {

-        internal static CommonResponse BadIfNonMatch()

-        {

-            return new CommonResponse(ErrorCodes.Http.Common.Header.IfNonMatch.BadFormat, MessageHeaderIfNonMatchBad);

-        }

-    }

-

-    internal static class ContentErrorResponse

-    {

-        internal static CommonResponse TooBig(string maxLength)

-        {

-            return new CommonResponse(ErrorCodes.Http.Common.Content.TooBig,

-                string.Format(CultureInfo.CurrentCulture, MessageContentTooBig, maxLength));

-        }

-

-        internal static CommonResponse UnmatchedLength_Smaller()

-        {

-            return new CommonResponse(ErrorCodes.Http.Common.Content.UnmatchedLength_Smaller, MessageContentUnmatchedLengthSmaller);

-        }

-        internal static CommonResponse UnmatchedLength_Bigger()

-        {

-            return new CommonResponse(ErrorCodes.Http.Common.Content.UnmatchedLength_Bigger, MessageContentUnmatchedLengthBigger);

-        }

-    }

-

-

     public class CommonDataResponse<T> : CommonResponse

     {

         public CommonDataResponse()

diff --git a/Timeline/Models/Http/ErrorResponse.cs b/Timeline/Models/Http/ErrorResponse.cs
new file mode 100644
index 00000000..6a53e0c3
--- /dev/null
+++ b/Timeline/Models/Http/ErrorResponse.cs
@@ -0,0 +1,261 @@
+using static Timeline.Resources.Messages;

+

+namespace Timeline.Models.Http

+{

+

+    public static class ErrorResponse

+    {

+

+        public static class Common

+        {

+

+            public static CommonResponse InvalidModel(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.Common.InvalidModel, string.Format(Common_InvalidModel, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_InvalidModel(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.Common.InvalidModel, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse Forbid(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.Common.Forbid, string.Format(Common_Forbid, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_Forbid(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.Common.Forbid, string.Format(message, formatArgs));

+            }

+

+            public static class Header

+            {

+

+                public static CommonResponse IfNonMatch_BadFormat(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.IfNonMatch_BadFormat, string.Format(Common_Header_IfNonMatch_BadFormat, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_IfNonMatch_BadFormat(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.IfNonMatch_BadFormat, string.Format(message, formatArgs));

+                }

+

+                public static CommonResponse ContentType_Missing(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.ContentType_Missing, string.Format(Common_Header_ContentType_Missing, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_ContentType_Missing(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.ContentType_Missing, string.Format(message, formatArgs));

+                }

+

+                public static CommonResponse ContentLength_Missing(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.ContentLength_Missing, string.Format(Common_Header_ContentLength_Missing, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_ContentLength_Missing(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.ContentLength_Missing, string.Format(message, formatArgs));

+                }

+

+                public static CommonResponse ContentLength_Zero(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.ContentLength_Zero, string.Format(Common_Header_ContentLength_Zero, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_ContentLength_Zero(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Header.ContentLength_Zero, string.Format(message, formatArgs));

+                }

+

+            }

+

+            public static class Content

+            {

+

+                public static CommonResponse TooBig(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Content.TooBig, string.Format(Common_Content_TooBig, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_TooBig(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Content.TooBig, string.Format(message, formatArgs));

+                }

+

+                public static CommonResponse UnmatchedLength_Smaller(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Content.UnmatchedLength_Smaller, string.Format(Common_Content_UnmatchedLength_Smaller, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_UnmatchedLength_Smaller(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Content.UnmatchedLength_Smaller, string.Format(message, formatArgs));

+                }

+

+                public static CommonResponse UnmatchedLength_Bigger(params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Content.UnmatchedLength_Bigger, string.Format(Common_Content_UnmatchedLength_Bigger, formatArgs));

+                }

+

+                public static CommonResponse CustomMessage_UnmatchedLength_Bigger(string message, params object?[] formatArgs)

+                {

+                    return new CommonResponse(ErrorCodes.Common.Content.UnmatchedLength_Bigger, string.Format(message, formatArgs));

+                }

+

+            }

+

+        }

+

+        public static class UserCommon

+        {

+

+            public static CommonResponse NotExist(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserCommon.NotExist, string.Format(UserCommon_NotExist, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_NotExist(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserCommon.NotExist, string.Format(message, formatArgs));

+            }

+

+        }

+

+        public static class TokenController

+        {

+

+            public static CommonResponse Create_BadCredential(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Create_BadCredential, string.Format(TokenController_Create_BadCredential, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_Create_BadCredential(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Create_BadCredential, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse Verify_BadFormat(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_BadFormat, string.Format(TokenController_Verify_BadFormat, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_Verify_BadFormat(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_BadFormat, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse Verify_UserNotExist(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_UserNotExist, string.Format(TokenController_Verify_UserNotExist, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_Verify_UserNotExist(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_UserNotExist, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse Verify_OldVersion(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_OldVersion, string.Format(TokenController_Verify_OldVersion, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_Verify_OldVersion(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_OldVersion, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse Verify_TimeExpired(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_TimeExpired, string.Format(TokenController_Verify_TimeExpired, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_Verify_TimeExpired(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TokenController.Verify_TimeExpired, string.Format(message, formatArgs));

+            }

+

+        }

+

+        public static class UserController

+        {

+

+            public static CommonResponse ChangeUsername_Conflict(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserController.ChangeUsername_Conflict, string.Format(UserController_ChangeUsername_Conflict, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_ChangeUsername_Conflict(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserController.ChangeUsername_Conflict, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse ChangePassword_BadOldPassword(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserController.ChangePassword_BadOldPassword, string.Format(UserController_ChangePassword_BadOldPassword, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_ChangePassword_BadOldPassword(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserController.ChangePassword_BadOldPassword, string.Format(message, formatArgs));

+            }

+

+        }

+

+        public static class UserAvatar

+        {

+

+            public static CommonResponse BadFormat_CantDecode(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserAvatar.BadFormat_CantDecode, string.Format(UserAvatar_BadFormat_CantDecode, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_BadFormat_CantDecode(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserAvatar.BadFormat_CantDecode, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse BadFormat_UnmatchedFormat(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserAvatar.BadFormat_UnmatchedFormat, string.Format(UserAvatar_BadFormat_UnmatchedFormat, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_BadFormat_UnmatchedFormat(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserAvatar.BadFormat_UnmatchedFormat, string.Format(message, formatArgs));

+            }

+

+            public static CommonResponse BadFormat_BadSize(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserAvatar.BadFormat_BadSize, string.Format(UserAvatar_BadFormat_BadSize, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_BadFormat_BadSize(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.UserAvatar.BadFormat_BadSize, string.Format(message, formatArgs));

+            }

+

+        }

+

+        public static class TimelineController

+        {

+

+            public static CommonResponse PostOperationDelete_NotExist(params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TimelineController.PostOperationDelete_NotExist, string.Format(TimelineController_PostOperationDelete_NotExist, formatArgs));

+            }

+

+            public static CommonResponse CustomMessage_PostOperationDelete_NotExist(string message, params object?[] formatArgs)

+            {

+                return new CommonResponse(ErrorCodes.TimelineController.PostOperationDelete_NotExist, string.Format(message, formatArgs));

+            }

+

+        }

+

+    }

+

+}

diff --git a/Timeline/Models/Http/Timeline.cs b/Timeline/Models/Http/Timeline.cs
index 06b88ad1..3029434e 100644
--- a/Timeline/Models/Http/Timeline.cs
+++ b/Timeline/Models/Http/Timeline.cs
@@ -1,9 +1,6 @@
 using System;

 using System.Collections.Generic;

 using System.ComponentModel.DataAnnotations;

-using System.Linq;

-using System.Threading.Tasks;

-using Timeline.Entities;

 

 namespace Timeline.Models.Http

 {

diff --git a/Timeline/Resources/Common.Designer.cs b/Timeline/Resources/Common.Designer.cs
deleted file mode 100644
index 4f1c8e3f..00000000
--- a/Timeline/Resources/Common.Designer.cs
+++ /dev/null
@@ -1,72 +0,0 @@
-//------------------------------------------------------------------------------

-// <auto-generated>

-//     This code was generated by a tool.

-//     Runtime Version:4.0.30319.42000

-//

-//     Changes to this file may cause incorrect behavior and will be lost if

-//     the code is regenerated.

-// </auto-generated>

-//------------------------------------------------------------------------------

-

-namespace Timeline.Resources {

-    using System;

-    

-    

-    /// <summary>

-    ///   A strongly-typed resource class, for looking up localized strings, etc.

-    /// </summary>

-    // This class was auto-generated by the StronglyTypedResourceBuilder

-    // class via a tool like ResGen or Visual Studio.

-    // To add or remove a member, edit your .ResX file then rerun ResGen

-    // with the /str option, or rebuild your VS project.

-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]

-    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

-    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

-    internal class Common {

-        

-        private static global::System.Resources.ResourceManager resourceMan;

-        

-        private static global::System.Globalization.CultureInfo resourceCulture;

-        

-        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]

-        internal Common() {

-        }

-        

-        /// <summary>

-        ///   Returns the cached ResourceManager instance used by this class.

-        /// </summary>

-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]

-        internal static global::System.Resources.ResourceManager ResourceManager {

-            get {

-                if (object.ReferenceEquals(resourceMan, null)) {

-                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Timeline.Resources.Common", typeof(Common).Assembly);

-                    resourceMan = temp;

-                }

-                return resourceMan;

-            }

-        }

-        

-        /// <summary>

-        ///   Overrides the current thread's CurrentUICulture property for all

-        ///   resource lookups using this strongly typed resource class.

-        /// </summary>

-        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]

-        internal static global::System.Globalization.CultureInfo Culture {

-            get {

-                return resourceCulture;

-            }

-            set {

-                resourceCulture = value;

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The branch is invalid. Normally this branch is not reachable..

-        /// </summary>

-        internal static string ExceptionInvalidBranch {

-            get {

-                return ResourceManager.GetString("ExceptionInvalidBranch", resourceCulture);

-            }

-        }

-    }

-}

diff --git a/Timeline/Resources/Common.resx b/Timeline/Resources/Common.resx
deleted file mode 100644
index 8a036996..00000000
--- a/Timeline/Resources/Common.resx
+++ /dev/null
@@ -1,123 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<root>

-  <!-- 

-    Microsoft ResX Schema 

-    

-    Version 2.0

-    

-    The primary goals of this format is to allow a simple XML format 

-    that is mostly human readable. The generation and parsing of the 

-    various data types are done through the TypeConverter classes 

-    associated with the data types.

-    

-    Example:

-    

-    ... ado.net/XML headers & schema ...

-    <resheader name="resmimetype">text/microsoft-resx</resheader>

-    <resheader name="version">2.0</resheader>

-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>

-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>

-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>

-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>

-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">

-        <value>[base64 mime encoded serialized .NET Framework object]</value>

-    </data>

-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">

-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>

-        <comment>This is a comment</comment>

-    </data>

-                

-    There are any number of "resheader" rows that contain simple 

-    name/value pairs.

-    

-    Each data row contains a name, and value. The row also contains a 

-    type or mimetype. Type corresponds to a .NET class that support 

-    text/value conversion through the TypeConverter architecture. 

-    Classes that don't support this are serialized and stored with the 

-    mimetype set.

-    

-    The mimetype is used for serialized objects, and tells the 

-    ResXResourceReader how to depersist the object. This is currently not 

-    extensible. For a given mimetype the value must be set accordingly:

-    

-    Note - application/x-microsoft.net.object.binary.base64 is the format 

-    that the ResXResourceWriter will generate, however the reader can 

-    read any of the formats listed below.

-    

-    mimetype: application/x-microsoft.net.object.binary.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter

-            : and then encoded with base64 encoding.

-    

-    mimetype: application/x-microsoft.net.object.soap.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter

-            : and then encoded with base64 encoding.

-

-    mimetype: application/x-microsoft.net.object.bytearray.base64

-    value   : The object must be serialized into a byte array 

-            : using a System.ComponentModel.TypeConverter

-            : and then encoded with base64 encoding.

-    -->

-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">

-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />

-    <xsd:element name="root" msdata:IsDataSet="true">

-      <xsd:complexType>

-        <xsd:choice maxOccurs="unbounded">

-          <xsd:element name="metadata">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" />

-              </xsd:sequence>

-              <xsd:attribute name="name" use="required" type="xsd:string" />

-              <xsd:attribute name="type" type="xsd:string" />

-              <xsd:attribute name="mimetype" type="xsd:string" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="assembly">

-            <xsd:complexType>

-              <xsd:attribute name="alias" type="xsd:string" />

-              <xsd:attribute name="name" type="xsd:string" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="data">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />

-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />

-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="resheader">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" />

-            </xsd:complexType>

-          </xsd:element>

-        </xsd:choice>

-      </xsd:complexType>

-    </xsd:element>

-  </xsd:schema>

-  <resheader name="resmimetype">

-    <value>text/microsoft-resx</value>

-  </resheader>

-  <resheader name="version">

-    <value>2.0</value>

-  </resheader>

-  <resheader name="reader">

-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <resheader name="writer">

-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <data name="ExceptionInvalidBranch" xml:space="preserve">

-    <value>The branch is invalid. Normally this branch is not reachable.</value>

-  </data>

-</root>
\ No newline at end of file
diff --git a/Timeline/Resources/Controllers/TimelineController.Designer.cs b/Timeline/Resources/Controllers/TimelineController.Designer.cs
index 47c43fa2..ae6414e6 100644
--- a/Timeline/Resources/Controllers/TimelineController.Designer.cs
+++ b/Timeline/Resources/Controllers/TimelineController.Designer.cs
@@ -77,59 +77,5 @@ namespace Timeline.Resources.Controllers {
                 return ResourceManager.GetString("LogUnknownTimelineMemberOperationUserException", resourceCulture);

             }

         }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The {0}-st username to do operation {1} on is of bad format..

-        /// </summary>

-        internal static string MessageMemberUsernameBadFormat {

-            get {

-                return ResourceManager.GetString("MessageMemberUsernameBadFormat", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The {0}-st user to do operation {1} on does not exist..

-        /// </summary>

-        internal static string MessageMemberUserNotExist {

-            get {

-                return ResourceManager.GetString("MessageMemberUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to You have no permission to read posts of the timeline..

-        /// </summary>

-        internal static string MessagePostListGetForbid {

-            get {

-                return ResourceManager.GetString("MessagePostListGetForbid", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to You have no permission to create posts in the timeline..

-        /// </summary>

-        internal static string MessagePostOperationCreateForbid {

-            get {

-                return ResourceManager.GetString("MessagePostOperationCreateForbid", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to You have no permission to delete posts in the timeline..

-        /// </summary>

-        internal static string MessagePostOperationDeleteForbid {

-            get {

-                return ResourceManager.GetString("MessagePostOperationDeleteForbid", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The post to delete does not exist..

-        /// </summary>

-        internal static string MessagePostOperationDeleteNotExist {

-            get {

-                return ResourceManager.GetString("MessagePostOperationDeleteNotExist", resourceCulture);

-            }

-        }

     }

 }

diff --git a/Timeline/Resources/Controllers/TimelineController.resx b/Timeline/Resources/Controllers/TimelineController.resx
index 0cf7e881..4cf3d6fb 100644
--- a/Timeline/Resources/Controllers/TimelineController.resx
+++ b/Timeline/Resources/Controllers/TimelineController.resx
@@ -123,22 +123,4 @@
   <data name="LogUnknownTimelineMemberOperationUserException" xml:space="preserve">

     <value>An unknown TimelineMemberOperationUserException is thrown. Can't recognize its inner exception. It is rethrown.</value>

   </data>

-  <data name="MessageMemberUsernameBadFormat" xml:space="preserve">

-    <value>The {0}-st username to do operation {1} on is of bad format.</value>

-  </data>

-  <data name="MessageMemberUserNotExist" xml:space="preserve">

-    <value>The {0}-st user to do operation {1} on does not exist.</value>

-  </data>

-  <data name="MessagePostListGetForbid" xml:space="preserve">

-    <value>You have no permission to read posts of the timeline.</value>

-  </data>

-  <data name="MessagePostOperationCreateForbid" xml:space="preserve">

-    <value>You have no permission to create posts in the timeline.</value>

-  </data>

-  <data name="MessagePostOperationDeleteForbid" xml:space="preserve">

-    <value>You have no permission to delete posts in the timeline.</value>

-  </data>

-  <data name="MessagePostOperationDeleteNotExist" xml:space="preserve">

-    <value>The post to delete does not exist.</value>

-  </data>

 </root>
\ No newline at end of file
diff --git a/Timeline/Resources/Controllers/TimelineController.zh.resx b/Timeline/Resources/Controllers/TimelineController.zh.resx
deleted file mode 100644
index 170ab4cd..00000000
--- a/Timeline/Resources/Controllers/TimelineController.zh.resx
+++ /dev/null
@@ -1,138 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<root>

-  <!-- 

-    Microsoft ResX Schema 

-    

-    Version 2.0

-    

-    The primary goals of this format is to allow a simple XML format 

-    that is mostly human readable. The generation and parsing of the 

-    various data types are done through the TypeConverter classes 

-    associated with the data types.

-    

-    Example:

-    

-    ... ado.net/XML headers & schema ...

-    <resheader name="resmimetype">text/microsoft-resx</resheader>

-    <resheader name="version">2.0</resheader>

-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>

-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>

-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>

-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>

-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">

-        <value>[base64 mime encoded serialized .NET Framework object]</value>

-    </data>

-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">

-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>

-        <comment>This is a comment</comment>

-    </data>

-                

-    There are any number of "resheader" rows that contain simple 

-    name/value pairs.

-    

-    Each data row contains a name, and value. The row also contains a 

-    type or mimetype. Type corresponds to a .NET class that support 

-    text/value conversion through the TypeConverter architecture. 

-    Classes that don't support this are serialized and stored with the 

-    mimetype set.

-    

-    The mimetype is used for serialized objects, and tells the 

-    ResXResourceReader how to depersist the object. This is currently not 

-    extensible. For a given mimetype the value must be set accordingly:

-    

-    Note - application/x-microsoft.net.object.binary.base64 is the format 

-    that the ResXResourceWriter will generate, however the reader can 

-    read any of the formats listed below.

-    

-    mimetype: application/x-microsoft.net.object.binary.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter

-            : and then encoded with base64 encoding.

-    

-    mimetype: application/x-microsoft.net.object.soap.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter

-            : and then encoded with base64 encoding.

-

-    mimetype: application/x-microsoft.net.object.bytearray.base64

-    value   : The object must be serialized into a byte array 

-            : using a System.ComponentModel.TypeConverter

-            : and then encoded with base64 encoding.

-    -->

-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">

-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />

-    <xsd:element name="root" msdata:IsDataSet="true">

-      <xsd:complexType>

-        <xsd:choice maxOccurs="unbounded">

-          <xsd:element name="metadata">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" />

-              </xsd:sequence>

-              <xsd:attribute name="name" use="required" type="xsd:string" />

-              <xsd:attribute name="type" type="xsd:string" />

-              <xsd:attribute name="mimetype" type="xsd:string" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="assembly">

-            <xsd:complexType>

-              <xsd:attribute name="alias" type="xsd:string" />

-              <xsd:attribute name="name" type="xsd:string" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="data">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />

-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />

-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="resheader">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" />

-            </xsd:complexType>

-          </xsd:element>

-        </xsd:choice>

-      </xsd:complexType>

-    </xsd:element>

-  </xsd:schema>

-  <resheader name="resmimetype">

-    <value>text/microsoft-resx</value>

-  </resheader>

-  <resheader name="version">

-    <value>2.0</value>

-  </resheader>

-  <resheader name="reader">

-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <resheader name="writer">

-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <data name="MessageMemberUsernameBadFormat" xml:space="preserve">

-    <value>第{0}个做{1}操作的用户名格式错误。</value>

-  </data>

-  <data name="MessageMemberUserNotExist" xml:space="preserve">

-    <value>第{0}个做{1}操作的用户不存在。</value>

-  </data>

-  <data name="MessagePostListGetForbid" xml:space="preserve">

-    <value>你没有权限读取这个时间线消息。</value>

-  </data>

-  <data name="MessagePostOperationCreateForbid" xml:space="preserve">

-    <value>你没有权限在这个时间线中创建消息。</value>

-  </data>

-  <data name="MessagePostOperationDeleteForbid" xml:space="preserve">

-    <value>你没有权限在这个时间线中删除消息。</value>

-  </data>

-  <data name="MessagePostOperationDeleteNotExist" xml:space="preserve">

-    <value>要删除的消息不存在。</value>

-  </data>

-</root>
\ No newline at end of file
diff --git a/Timeline/Resources/Controllers/TokenController.Designer.cs b/Timeline/Resources/Controllers/TokenController.Designer.cs
index 22e6a8be..a7c2864b 100644
--- a/Timeline/Resources/Controllers/TokenController.Designer.cs
+++ b/Timeline/Resources/Controllers/TokenController.Designer.cs
@@ -61,51 +61,6 @@ namespace Timeline.Resources.Controllers {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to Username or password is invalid..

-        /// </summary>

-        internal static string ErrorBadCredential {

-            get {

-                return ResourceManager.GetString("ErrorBadCredential", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The token is of bad format. It might not be created by the server..

-        /// </summary>

-        internal static string ErrorVerifyBadFormat {

-            get {

-                return ResourceManager.GetString("ErrorVerifyBadFormat", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The token is expired..

-        /// </summary>

-        internal static string ErrorVerifyExpire {

-            get {

-                return ResourceManager.GetString("ErrorVerifyExpire", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Token has an old version. User might have update some info..

-        /// </summary>

-        internal static string ErrorVerifyOldVersion {

-            get {

-                return ResourceManager.GetString("ErrorVerifyOldVersion", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to User does not exist. Administrator might have deleted this user..

-        /// </summary>

-        internal static string ErrorVerifyUserNotExist {

-            get {

-                return ResourceManager.GetString("ErrorVerifyUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

         ///   Looks up a localized string similar to The password is wrong..

         /// </summary>

         internal static string LogBadPassword {

diff --git a/Timeline/Resources/Controllers/TokenController.resx b/Timeline/Resources/Controllers/TokenController.resx
index 42e1ff92..683d6cc9 100644
--- a/Timeline/Resources/Controllers/TokenController.resx
+++ b/Timeline/Resources/Controllers/TokenController.resx
@@ -117,21 +117,6 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="ErrorBadCredential" xml:space="preserve">

-    <value>Username or password is invalid.</value>

-  </data>

-  <data name="ErrorVerifyBadFormat" xml:space="preserve">

-    <value>The token is of bad format. It might not be created by the server.</value>

-  </data>

-  <data name="ErrorVerifyExpire" xml:space="preserve">

-    <value>The token is expired.</value>

-  </data>

-  <data name="ErrorVerifyOldVersion" xml:space="preserve">

-    <value>Token has an old version. User might have update some info.</value>

-  </data>

-  <data name="ErrorVerifyUserNotExist" xml:space="preserve">

-    <value>User does not exist. Administrator might have deleted this user.</value>

-  </data>

   <data name="LogBadPassword" xml:space="preserve">

     <value>The password is wrong.</value>

   </data>

diff --git a/Timeline/Resources/Controllers/UserAvatarController.Designer.cs b/Timeline/Resources/Controllers/UserAvatarController.Designer.cs
index 1dacb19f..e6eeb1e8 100644
--- a/Timeline/Resources/Controllers/UserAvatarController.Designer.cs
+++ b/Timeline/Resources/Controllers/UserAvatarController.Designer.cs
@@ -61,78 +61,6 @@ namespace Timeline.Resources.Controllers {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to Normal user can&apos;t delete other&apos;s avatar..

-        /// </summary>

-        internal static string ErrorDeleteForbid {

-            get {

-                return ResourceManager.GetString("ErrorDeleteForbid", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to User does not exist..

-        /// </summary>

-        internal static string ErrorDeleteUserNotExist {

-            get {

-                return ResourceManager.GetString("ErrorDeleteUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to User does not exist..

-        /// </summary>

-        internal static string ErrorGetUserNotExist {

-            get {

-                return ResourceManager.GetString("ErrorGetUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Image is not a square..

-        /// </summary>

-        internal static string ErrorPutBadFormatBadSize {

-            get {

-                return ResourceManager.GetString("ErrorPutBadFormatBadSize", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Decoding image failed..

-        /// </summary>

-        internal static string ErrorPutBadFormatCantDecode {

-            get {

-                return ResourceManager.GetString("ErrorPutBadFormatCantDecode", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Image format is not the one in header..

-        /// </summary>

-        internal static string ErrorPutBadFormatUnmatchedFormat {

-            get {

-                return ResourceManager.GetString("ErrorPutBadFormatUnmatchedFormat", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Normal user can&apos;t change other&apos;s avatar..

-        /// </summary>

-        internal static string ErrorPutForbid {

-            get {

-                return ResourceManager.GetString("ErrorPutForbid", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to User does not exist..

-        /// </summary>

-        internal static string ErrorPutUserNotExist {

-            get {

-                return ResourceManager.GetString("ErrorPutUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

         ///   Looks up a localized string similar to Unknown AvatarDataException.ErrorReason value..

         /// </summary>

         internal static string ExceptionUnknownAvatarFormatError {

diff --git a/Timeline/Resources/Controllers/UserAvatarController.resx b/Timeline/Resources/Controllers/UserAvatarController.resx
index 3f444b04..58860c83 100644
--- a/Timeline/Resources/Controllers/UserAvatarController.resx
+++ b/Timeline/Resources/Controllers/UserAvatarController.resx
@@ -117,30 +117,6 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="ErrorDeleteForbid" xml:space="preserve">

-    <value>Normal user can't delete other's avatar.</value>

-  </data>

-  <data name="ErrorDeleteUserNotExist" xml:space="preserve">

-    <value>User does not exist.</value>

-  </data>

-  <data name="ErrorGetUserNotExist" xml:space="preserve">

-    <value>User does not exist.</value>

-  </data>

-  <data name="ErrorPutBadFormatBadSize" xml:space="preserve">

-    <value>Image is not a square.</value>

-  </data>

-  <data name="ErrorPutBadFormatCantDecode" xml:space="preserve">

-    <value>Decoding image failed.</value>

-  </data>

-  <data name="ErrorPutBadFormatUnmatchedFormat" xml:space="preserve">

-    <value>Image format is not the one in header.</value>

-  </data>

-  <data name="ErrorPutForbid" xml:space="preserve">

-    <value>Normal user can't change other's avatar.</value>

-  </data>

-  <data name="ErrorPutUserNotExist" xml:space="preserve">

-    <value>User does not exist.</value>

-  </data>

   <data name="ExceptionUnknownAvatarFormatError" xml:space="preserve">

     <value>Unknown AvatarDataException.ErrorReason value.</value>

   </data>

diff --git a/Timeline/Resources/Controllers/UserController.Designer.cs b/Timeline/Resources/Controllers/UserController.Designer.cs
index 0c9ac0d7..c8067614 100644
--- a/Timeline/Resources/Controllers/UserController.Designer.cs
+++ b/Timeline/Resources/Controllers/UserController.Designer.cs
@@ -61,56 +61,11 @@ namespace Timeline.Resources.Controllers {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to Old password is wrong..

+        ///   Looks up a localized string similar to Unknown PutResult..

         /// </summary>

-        internal static string ErrorChangePasswordBadPassword {

+        internal static string ExceptionUnknownPutResult {

             get {

-                return ResourceManager.GetString("ErrorChangePasswordBadPassword", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The new username {0} already exists..

-        /// </summary>

-        internal static string ErrorChangeUsernameAlreadyExist {

-            get {

-                return ResourceManager.GetString("ErrorChangeUsernameAlreadyExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The old username {0} does not exist..

-        /// </summary>

-        internal static string ErrorChangeUsernameNotExist {

-            get {

-                return ResourceManager.GetString("ErrorChangeUsernameNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The user does not exist..

-        /// </summary>

-        internal static string ErrorGetUserNotExist {

-            get {

-                return ResourceManager.GetString("ErrorGetUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Can&apos;t patch a user that does not exist..

-        /// </summary>

-        internal static string ErrorPatchUserNotExist {

-            get {

-                return ResourceManager.GetString("ErrorPatchUserNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Username is of bad format..

-        /// </summary>

-        internal static string ErrorPutBadUsername {

-            get {

-                return ResourceManager.GetString("ErrorPutBadUsername", resourceCulture);

+                return ResourceManager.GetString("ExceptionUnknownPutResult", resourceCulture);

             }

         }

         

@@ -124,20 +79,11 @@ namespace Timeline.Resources.Controllers {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to A user has changed password..

-        /// </summary>

-        internal static string LogChangePasswordSuccess {

-            get {

-                return ResourceManager.GetString("LogChangePasswordSuccess", resourceCulture);

-            }

-        }

-        

-        /// <summary>

         ///   Looks up a localized string similar to Attempt to change a user&apos;s username to a existent one failed..

         /// </summary>

-        internal static string LogChangeUsernameAlreadyExist {

+        internal static string LogChangeUsernameConflict {

             get {

-                return ResourceManager.GetString("LogChangeUsernameAlreadyExist", resourceCulture);

+                return ResourceManager.GetString("LogChangeUsernameConflict", resourceCulture);

             }

         }

         

@@ -151,33 +97,6 @@ namespace Timeline.Resources.Controllers {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to A user has changed username..

-        /// </summary>

-        internal static string LogChangeUsernameSuccess {

-            get {

-                return ResourceManager.GetString("LogChangeUsernameSuccess", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to A user has been deleted..

-        /// </summary>

-        internal static string LogDeleteDelete {

-            get {

-                return ResourceManager.GetString("LogDeleteDelete", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Attempt to delete a user that does not exist..

-        /// </summary>

-        internal static string LogDeleteNotExist {

-            get {

-                return ResourceManager.GetString("LogDeleteNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

         ///   Looks up a localized string similar to Attempt to retrieve info of a user that does not exist failed..

         /// </summary>

         internal static string LogGetUserNotExist {

@@ -194,32 +113,5 @@ namespace Timeline.Resources.Controllers {
                 return ResourceManager.GetString("LogPatchUserNotExist", resourceCulture);

             }

         }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Attempt to create a user with bad username failed..

-        /// </summary>

-        internal static string LogPutBadUsername {

-            get {

-                return ResourceManager.GetString("LogPutBadUsername", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to A user has been created..

-        /// </summary>

-        internal static string LogPutCreate {

-            get {

-                return ResourceManager.GetString("LogPutCreate", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to A user has been modified..

-        /// </summary>

-        internal static string LogPutModify {

-            get {

-                return ResourceManager.GetString("LogPutModify", resourceCulture);

-            }

-        }

     }

 }

diff --git a/Timeline/Resources/Controllers/UserController.resx b/Timeline/Resources/Controllers/UserController.resx
index 50aa13d6..0bdf4845 100644
--- a/Timeline/Resources/Controllers/UserController.resx
+++ b/Timeline/Resources/Controllers/UserController.resx
@@ -117,58 +117,22 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="ErrorChangePasswordBadPassword" xml:space="preserve">

-    <value>Old password is wrong.</value>

-  </data>

-  <data name="ErrorChangeUsernameAlreadyExist" xml:space="preserve">

-    <value>The new username {0} already exists.</value>

-  </data>

-  <data name="ErrorChangeUsernameNotExist" xml:space="preserve">

-    <value>The old username {0} does not exist.</value>

-  </data>

-  <data name="ErrorGetUserNotExist" xml:space="preserve">

-    <value>The user does not exist.</value>

-  </data>

-  <data name="ErrorPatchUserNotExist" xml:space="preserve">

-    <value>Can't patch a user that does not exist.</value>

-  </data>

-  <data name="ErrorPutBadUsername" xml:space="preserve">

-    <value>Username is of bad format.</value>

+  <data name="ExceptionUnknownPutResult" xml:space="preserve">

+    <value>Unknown PutResult.</value>

   </data>

   <data name="LogChangePasswordBadPassword" xml:space="preserve">

     <value>Attempt to change password with wrong old password failed.</value>

   </data>

-  <data name="LogChangePasswordSuccess" xml:space="preserve">

-    <value>A user has changed password.</value>

-  </data>

-  <data name="LogChangeUsernameAlreadyExist" xml:space="preserve">

+  <data name="LogChangeUsernameConflict" xml:space="preserve">

     <value>Attempt to change a user's username to a existent one failed.</value>

   </data>

   <data name="LogChangeUsernameNotExist" xml:space="preserve">

     <value>Attempt to change a username of a user that does not exist failed.</value>

   </data>

-  <data name="LogChangeUsernameSuccess" xml:space="preserve">

-    <value>A user has changed username.</value>

-  </data>

-  <data name="LogDeleteDelete" xml:space="preserve">

-    <value>A user has been deleted.</value>

-  </data>

-  <data name="LogDeleteNotExist" xml:space="preserve">

-    <value>Attempt to delete a user that does not exist.</value>

-  </data>

   <data name="LogGetUserNotExist" xml:space="preserve">

     <value>Attempt to retrieve info of a user that does not exist failed.</value>

   </data>

   <data name="LogPatchUserNotExist" xml:space="preserve">

     <value>Attempt to patch a user that does not exist failed.</value>

   </data>

-  <data name="LogPutBadUsername" xml:space="preserve">

-    <value>Attempt to create a user with bad username failed.</value>

-  </data>

-  <data name="LogPutCreate" xml:space="preserve">

-    <value>A user has been created.</value>

-  </data>

-  <data name="LogPutModify" xml:space="preserve">

-    <value>A user has been modified.</value>

-  </data>

 </root>
\ No newline at end of file
diff --git a/Timeline/Resources/Controllers/UserController.zh.resx b/Timeline/Resources/Controllers/UserController.zh.resx
deleted file mode 100644
index 3556083e..00000000
--- a/Timeline/Resources/Controllers/UserController.zh.resx
+++ /dev/null
@@ -1,138 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<root>

-  <!-- 

-    Microsoft ResX Schema 

-    

-    Version 2.0

-    

-    The primary goals of this format is to allow a simple XML format 

-    that is mostly human readable. The generation and parsing of the 

-    various data types are done through the TypeConverter classes 

-    associated with the data types.

-    

-    Example:

-    

-    ... ado.net/XML headers & schema ...

-    <resheader name="resmimetype">text/microsoft-resx</resheader>

-    <resheader name="version">2.0</resheader>

-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>

-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>

-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>

-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>

-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">

-        <value>[base64 mime encoded serialized .NET Framework object]</value>

-    </data>

-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">

-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>

-        <comment>This is a comment</comment>

-    </data>

-                

-    There are any number of "resheader" rows that contain simple 

-    name/value pairs.

-    

-    Each data row contains a name, and value. The row also contains a 

-    type or mimetype. Type corresponds to a .NET class that support 

-    text/value conversion through the TypeConverter architecture. 

-    Classes that don't support this are serialized and stored with the 

-    mimetype set.

-    

-    The mimetype is used for serialized objects, and tells the 

-    ResXResourceReader how to depersist the object. This is currently not 

-    extensible. For a given mimetype the value must be set accordingly:

-    

-    Note - application/x-microsoft.net.object.binary.base64 is the format 

-    that the ResXResourceWriter will generate, however the reader can 

-    read any of the formats listed below.

-    

-    mimetype: application/x-microsoft.net.object.binary.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter

-            : and then encoded with base64 encoding.

-    

-    mimetype: application/x-microsoft.net.object.soap.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter

-            : and then encoded with base64 encoding.

-

-    mimetype: application/x-microsoft.net.object.bytearray.base64

-    value   : The object must be serialized into a byte array 

-            : using a System.ComponentModel.TypeConverter

-            : and then encoded with base64 encoding.

-    -->

-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">

-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />

-    <xsd:element name="root" msdata:IsDataSet="true">

-      <xsd:complexType>

-        <xsd:choice maxOccurs="unbounded">

-          <xsd:element name="metadata">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" />

-              </xsd:sequence>

-              <xsd:attribute name="name" use="required" type="xsd:string" />

-              <xsd:attribute name="type" type="xsd:string" />

-              <xsd:attribute name="mimetype" type="xsd:string" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="assembly">

-            <xsd:complexType>

-              <xsd:attribute name="alias" type="xsd:string" />

-              <xsd:attribute name="name" type="xsd:string" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="data">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />

-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />

-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="resheader">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" />

-            </xsd:complexType>

-          </xsd:element>

-        </xsd:choice>

-      </xsd:complexType>

-    </xsd:element>

-  </xsd:schema>

-  <resheader name="resmimetype">

-    <value>text/microsoft-resx</value>

-  </resheader>

-  <resheader name="version">

-    <value>2.0</value>

-  </resheader>

-  <resheader name="reader">

-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <resheader name="writer">

-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <data name="ErrorChangePasswordBadPassword" xml:space="preserve">

-    <value>旧密码错误。</value>

-  </data>

-  <data name="ErrorChangeUsernameAlreadyExist" xml:space="preserve">

-    <value>新用户名{0}已经存在。</value>

-  </data>

-  <data name="ErrorChangeUsernameNotExist" xml:space="preserve">

-    <value>旧用户名{0}不存在。</value>

-  </data>

-  <data name="ErrorGetUserNotExist" xml:space="preserve">

-    <value>用户不存在。</value>

-  </data>

-  <data name="ErrorPatchUserNotExist" xml:space="preserve">

-    <value>不能修改一个不存在的用户。</value>

-  </data>

-  <data name="ErrorPutBadUsername" xml:space="preserve">

-    <value>用户名格式错误。</value>

-  </data>

-</root>
\ No newline at end of file
diff --git a/Timeline/Resources/Filters.Designer.cs b/Timeline/Resources/Filters.Designer.cs
index 5576190d..dedfe498 100644
--- a/Timeline/Resources/Filters.Designer.cs
+++ b/Timeline/Resources/Filters.Designer.cs
@@ -86,68 +86,5 @@ namespace Timeline.Resources {
                 return ResourceManager.GetString("LogSelfOrAdminUsernameNotString", resourceCulture);

             }

         }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Header Content-Length is missing or of bad format..

-        /// </summary>

-        internal static string MessageHeaderContentLengthMissing {

-            get {

-                return ResourceManager.GetString("MessageHeaderContentLengthMissing", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Header Content-Length must not be 0..

-        /// </summary>

-        internal static string MessageHeaderContentLengthZero {

-            get {

-                return ResourceManager.GetString("MessageHeaderContentLengthZero", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Header Content-Type is required..

-        /// </summary>

-        internal static string MessageHeaderContentTypeMissing {

-            get {

-                return ResourceManager.GetString("MessageHeaderContentTypeMissing", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to You can&apos;t access the resource unless you are the owner or administrator..

-        /// </summary>

-        internal static string MessageSelfOrAdminForbid {

-            get {

-                return ResourceManager.GetString("MessageSelfOrAdminForbid", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The requested timeline does not exist..

-        /// </summary>

-        internal static string MessageTimelineNotExist {

-            get {

-                return ResourceManager.GetString("MessageTimelineNotExist", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The requested personal timeline does not exist because the user does not exist..

-        /// </summary>

-        internal static string MessageTimelineNotExistUser {

-            get {

-                return ResourceManager.GetString("MessageTimelineNotExistUser", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to The user does not exist..

-        /// </summary>

-        internal static string MessageUserNotExist {

-            get {

-                return ResourceManager.GetString("MessageUserNotExist", resourceCulture);

-            }

-        }

     }

 }

diff --git a/Timeline/Resources/Filters.resx b/Timeline/Resources/Filters.resx
index 7bfbc703..22620889 100644
--- a/Timeline/Resources/Filters.resx
+++ b/Timeline/Resources/Filters.resx
@@ -126,25 +126,4 @@
   <data name="LogSelfOrAdminUsernameNotString" xml:space="preserve">

     <value>You apply a SelfOrAdminAttribute on an action, found a model named username, but it is not string.</value>

   </data>

-  <data name="MessageHeaderContentLengthMissing" xml:space="preserve">

-    <value>Header Content-Length is missing or of bad format.</value>

-  </data>

-  <data name="MessageHeaderContentLengthZero" xml:space="preserve">

-    <value>Header Content-Length must not be 0.</value>

-  </data>

-  <data name="MessageHeaderContentTypeMissing" xml:space="preserve">

-    <value>Header Content-Type is required.</value>

-  </data>

-  <data name="MessageSelfOrAdminForbid" xml:space="preserve">

-    <value>You can't access the resource unless you are the owner or administrator.</value>

-  </data>

-  <data name="MessageTimelineNotExist" xml:space="preserve">

-    <value>The requested timeline does not exist.</value>

-  </data>

-  <data name="MessageTimelineNotExistUser" xml:space="preserve">

-    <value>The requested personal timeline does not exist because the user does not exist.</value>

-  </data>

-  <data name="MessageUserNotExist" xml:space="preserve">

-    <value>The user does not exist.</value>

-  </data>

 </root>
\ No newline at end of file
diff --git a/Timeline/Resources/Filters.zh.resx b/Timeline/Resources/Filters.zh.resx
deleted file mode 100644
index 36aac788..00000000
--- a/Timeline/Resources/Filters.zh.resx
+++ /dev/null
@@ -1,141 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>

-<root>

-  <!-- 

-    Microsoft ResX Schema 

-    

-    Version 2.0

-    

-    The primary goals of this format is to allow a simple XML format 

-    that is mostly human readable. The generation and parsing of the 

-    various data types are done through the TypeConverter classes 

-    associated with the data types.

-    

-    Example:

-    

-    ... ado.net/XML headers & schema ...

-    <resheader name="resmimetype">text/microsoft-resx</resheader>

-    <resheader name="version">2.0</resheader>

-    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>

-    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>

-    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>

-    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>

-    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">

-        <value>[base64 mime encoded serialized .NET Framework object]</value>

-    </data>

-    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">

-        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>

-        <comment>This is a comment</comment>

-    </data>

-                

-    There are any number of "resheader" rows that contain simple 

-    name/value pairs.

-    

-    Each data row contains a name, and value. The row also contains a 

-    type or mimetype. Type corresponds to a .NET class that support 

-    text/value conversion through the TypeConverter architecture. 

-    Classes that don't support this are serialized and stored with the 

-    mimetype set.

-    

-    The mimetype is used for serialized objects, and tells the 

-    ResXResourceReader how to depersist the object. This is currently not 

-    extensible. For a given mimetype the value must be set accordingly:

-    

-    Note - application/x-microsoft.net.object.binary.base64 is the format 

-    that the ResXResourceWriter will generate, however the reader can 

-    read any of the formats listed below.

-    

-    mimetype: application/x-microsoft.net.object.binary.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter

-            : and then encoded with base64 encoding.

-    

-    mimetype: application/x-microsoft.net.object.soap.base64

-    value   : The object must be serialized with 

-            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter

-            : and then encoded with base64 encoding.

-

-    mimetype: application/x-microsoft.net.object.bytearray.base64

-    value   : The object must be serialized into a byte array 

-            : using a System.ComponentModel.TypeConverter

-            : and then encoded with base64 encoding.

-    -->

-  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">

-    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />

-    <xsd:element name="root" msdata:IsDataSet="true">

-      <xsd:complexType>

-        <xsd:choice maxOccurs="unbounded">

-          <xsd:element name="metadata">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" />

-              </xsd:sequence>

-              <xsd:attribute name="name" use="required" type="xsd:string" />

-              <xsd:attribute name="type" type="xsd:string" />

-              <xsd:attribute name="mimetype" type="xsd:string" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="assembly">

-            <xsd:complexType>

-              <xsd:attribute name="alias" type="xsd:string" />

-              <xsd:attribute name="name" type="xsd:string" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="data">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />

-              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />

-              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />

-              <xsd:attribute ref="xml:space" />

-            </xsd:complexType>

-          </xsd:element>

-          <xsd:element name="resheader">

-            <xsd:complexType>

-              <xsd:sequence>

-                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />

-              </xsd:sequence>

-              <xsd:attribute name="name" type="xsd:string" use="required" />

-            </xsd:complexType>

-          </xsd:element>

-        </xsd:choice>

-      </xsd:complexType>

-    </xsd:element>

-  </xsd:schema>

-  <resheader name="resmimetype">

-    <value>text/microsoft-resx</value>

-  </resheader>

-  <resheader name="version">

-    <value>2.0</value>

-  </resheader>

-  <resheader name="reader">

-    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <resheader name="writer">

-    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

-  </resheader>

-  <data name="MessageHeaderContentLengthMissing" xml:space="preserve">

-    <value>请求头Content-Length缺失或者格式不对。</value>

-  </data>

-  <data name="MessageHeaderContentLengthZero" xml:space="preserve">

-    <value>请求头Content-Length不能为0。</value>

-  </data>

-  <data name="MessageHeaderContentTypeMissing" xml:space="preserve">

-    <value>缺少必需的请求头Content-Type。</value>

-  </data>

-  <data name="MessageSelfOrAdminForbid" xml:space="preserve">

-    <value>你无权访问该资源除非你是资源的拥有者或者管理员。</value>

-  </data>

-  <data name="MessageTimelineNotExist" xml:space="preserve">

-    <value>请求的时间线不存在。</value>

-  </data>

-  <data name="MessageTimelineNotExistUser" xml:space="preserve">

-    <value>请求的个人时间线不存在因为该用户不存在。</value>

-  </data>

-  <data name="MessageUserNotExist" xml:space="preserve">

-    <value>用户不存在。</value>

-  </data>

-</root>
\ No newline at end of file
diff --git a/Timeline/Resources/Messages.Designer.cs b/Timeline/Resources/Messages.Designer.cs
new file mode 100644
index 00000000..8c13374f
--- /dev/null
+++ b/Timeline/Resources/Messages.Designer.cs
@@ -0,0 +1,270 @@
+//------------------------------------------------------------------------------

+// <auto-generated>

+//     This code was generated by a tool.

+//     Runtime Version:4.0.30319.42000

+//

+//     Changes to this file may cause incorrect behavior and will be lost if

+//     the code is regenerated.

+// </auto-generated>

+//------------------------------------------------------------------------------

+

+namespace Timeline.Resources {

+    using System;

+    

+    

+    /// <summary>

+    ///   A strongly-typed resource class, for looking up localized strings, etc.

+    /// </summary>

+    // This class was auto-generated by the StronglyTypedResourceBuilder

+    // class via a tool like ResGen or Visual Studio.

+    // To add or remove a member, edit your .ResX file then rerun ResGen

+    // with the /str option, or rebuild your VS project.

+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "16.0.0.0")]

+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]

+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]

+    internal class Messages {

+        

+        private static global::System.Resources.ResourceManager resourceMan;

+        

+        private static global::System.Globalization.CultureInfo resourceCulture;

+        

+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]

+        internal Messages() {

+        }

+        

+        /// <summary>

+        ///   Returns the cached ResourceManager instance used by this class.

+        /// </summary>

+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]

+        internal static global::System.Resources.ResourceManager ResourceManager {

+            get {

+                if (object.ReferenceEquals(resourceMan, null)) {

+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("Timeline.Resources.Messages", typeof(Messages).Assembly);

+                    resourceMan = temp;

+                }

+                return resourceMan;

+            }

+        }

+        

+        /// <summary>

+        ///   Overrides the current thread's CurrentUICulture property for all

+        ///   resource lookups using this strongly typed resource class.

+        /// </summary>

+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]

+        internal static global::System.Globalization.CultureInfo Culture {

+            get {

+                return resourceCulture;

+            }

+            set {

+                resourceCulture = value;

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Body is too big. It can&apos;t be bigger than {0}..

+        /// </summary>

+        internal static string Common_Content_TooBig {

+            get {

+                return ResourceManager.GetString("Common_Content_TooBig", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Actual body length is bigger than it in header..

+        /// </summary>

+        internal static string Common_Content_UnmatchedLength_Bigger {

+            get {

+                return ResourceManager.GetString("Common_Content_UnmatchedLength_Bigger", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Actual body length is smaller than it in header..

+        /// </summary>

+        internal static string Common_Content_UnmatchedLength_Smaller {

+            get {

+                return ResourceManager.GetString("Common_Content_UnmatchedLength_Smaller", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to You have no permission to do the operation..

+        /// </summary>

+        internal static string Common_Forbid {

+            get {

+                return ResourceManager.GetString("Common_Forbid", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Header Content-Length is missing or of bad format..

+        /// </summary>

+        internal static string Common_Header_ContentLength_Missing {

+            get {

+                return ResourceManager.GetString("Common_Header_ContentLength_Missing", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Header Content-Length must not be 0..

+        /// </summary>

+        internal static string Common_Header_ContentLength_Zero {

+            get {

+                return ResourceManager.GetString("Common_Header_ContentLength_Zero", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Header Content-Type is missing..

+        /// </summary>

+        internal static string Common_Header_ContentType_Missing {

+            get {

+                return ResourceManager.GetString("Common_Header_ContentType_Missing", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Header If-Non-Match is of bad format..

+        /// </summary>

+        internal static string Common_Header_IfNonMatch_BadFormat {

+            get {

+                return ResourceManager.GetString("Common_Header_IfNonMatch_BadFormat", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Model is of bad format..

+        /// </summary>

+        internal static string Common_InvalidModel {

+            get {

+                return ResourceManager.GetString("Common_InvalidModel", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The {0}-st username to do operation {1} on is of bad format..

+        /// </summary>

+        internal static string TimelineController_ChangeMember_UsernameBadFormat {

+            get {

+                return ResourceManager.GetString("TimelineController_ChangeMember_UsernameBadFormat", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The {0}-st user to do operation {1} on does not exist..

+        /// </summary>

+        internal static string TimelineController_ChangeMember_UserNotExist {

+            get {

+                return ResourceManager.GetString("TimelineController_ChangeMember_UserNotExist", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The post to delete does not exist..

+        /// </summary>

+        internal static string TimelineController_PostOperationDelete_NotExist {

+            get {

+                return ResourceManager.GetString("TimelineController_PostOperationDelete_NotExist", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Username or password is invalid..

+        /// </summary>

+        internal static string TokenController_Create_BadCredential {

+            get {

+                return ResourceManager.GetString("TokenController_Create_BadCredential", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The token is of bad format. It might not be created by the server..

+        /// </summary>

+        internal static string TokenController_Verify_BadFormat {

+            get {

+                return ResourceManager.GetString("TokenController_Verify_BadFormat", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Token has an old version. User might have update some info..

+        /// </summary>

+        internal static string TokenController_Verify_OldVersion {

+            get {

+                return ResourceManager.GetString("TokenController_Verify_OldVersion", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The token is expired..

+        /// </summary>

+        internal static string TokenController_Verify_TimeExpired {

+            get {

+                return ResourceManager.GetString("TokenController_Verify_TimeExpired", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to User does not exist. Administrator might have deleted this user..

+        /// </summary>

+        internal static string TokenController_Verify_UserNotExist {

+            get {

+                return ResourceManager.GetString("TokenController_Verify_UserNotExist", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Image is not a square..

+        /// </summary>

+        internal static string UserAvatar_BadFormat_BadSize {

+            get {

+                return ResourceManager.GetString("UserAvatar_BadFormat_BadSize", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Image decode failed..

+        /// </summary>

+        internal static string UserAvatar_BadFormat_CantDecode {

+            get {

+                return ResourceManager.GetString("UserAvatar_BadFormat_CantDecode", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Image format does not match the one in header..

+        /// </summary>

+        internal static string UserAvatar_BadFormat_UnmatchedFormat {

+            get {

+                return ResourceManager.GetString("UserAvatar_BadFormat_UnmatchedFormat", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The user to operate on does not exist..

+        /// </summary>

+        internal static string UserCommon_NotExist {

+            get {

+                return ResourceManager.GetString("UserCommon_NotExist", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to Old password is wrong..

+        /// </summary>

+        internal static string UserController_ChangePassword_BadOldPassword {

+            get {

+                return ResourceManager.GetString("UserController_ChangePassword_BadOldPassword", resourceCulture);

+            }

+        }

+        

+        /// <summary>

+        ///   Looks up a localized string similar to The new username already exists..

+        /// </summary>

+        internal static string UserController_ChangeUsername_Conflict {

+            get {

+                return ResourceManager.GetString("UserController_ChangeUsername_Conflict", resourceCulture);

+            }

+        }

+    }

+}

diff --git a/Timeline/Resources/Controllers/UserAvatarController.zh.resx b/Timeline/Resources/Messages.resx
index 94de1606..c5228ed5 100644
--- a/Timeline/Resources/Controllers/UserAvatarController.zh.resx
+++ b/Timeline/Resources/Messages.resx
@@ -117,28 +117,73 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="ErrorDeleteForbid" xml:space="preserve">

-    <value>普通用户不能删除其他用户的头像。</value>

+  <data name="Common_Content_TooBig" xml:space="preserve">

+    <value>Body is too big. It can't be bigger than {0}.</value>

   </data>

-  <data name="ErrorDeleteUserNotExist" xml:space="preserve">

-    <value>用户不存在。</value>

+  <data name="Common_Content_UnmatchedLength_Bigger" xml:space="preserve">

+    <value>Actual body length is bigger than it in header.</value>

   </data>

-  <data name="ErrorGetUserNotExist" xml:space="preserve">

-    <value>用户不存在。</value>

+  <data name="Common_Content_UnmatchedLength_Smaller" xml:space="preserve">

+    <value>Actual body length is smaller than it in header.</value>

   </data>

-  <data name="ErrorPutBadFormatBadSize" xml:space="preserve">

-    <value>图片不是正方形。</value>

+  <data name="Common_Forbid" xml:space="preserve">

+    <value>You have no permission to do the operation.</value>

   </data>

-  <data name="ErrorPutBadFormatCantDecode" xml:space="preserve">

-    <value>解码图片失败。</value>

+  <data name="Common_Header_ContentLength_Missing" xml:space="preserve">

+    <value>Header Content-Length is missing or of bad format.</value>

   </data>

-  <data name="ErrorPutBadFormatUnmatchedFormat" xml:space="preserve">

-    <value>图片格式与请求头中指示的不一样。</value>

+  <data name="Common_Header_ContentLength_Zero" xml:space="preserve">

+    <value>Header Content-Length must not be 0.</value>

   </data>

-  <data name="ErrorPutForbid" xml:space="preserve">

-    <value>普通用户不能修改其他用户的头像。</value>

+  <data name="Common_Header_ContentType_Missing" xml:space="preserve">

+    <value>Header Content-Type is missing.</value>

   </data>

-  <data name="ErrorPutUserNotExist" xml:space="preserve">

-    <value>用户不存在。</value>

+  <data name="Common_Header_IfNonMatch_BadFormat" xml:space="preserve">

+    <value>Header If-Non-Match is of bad format.</value>

+  </data>

+  <data name="Common_InvalidModel" xml:space="preserve">

+    <value>Model is of bad format.</value>

+  </data>

+  <data name="TimelineController_ChangeMember_UsernameBadFormat" xml:space="preserve">

+    <value>The {0}-st username to do operation {1} on is of bad format.</value>

+  </data>

+  <data name="TimelineController_ChangeMember_UserNotExist" xml:space="preserve">

+    <value>The {0}-st user to do operation {1} on does not exist.</value>

+  </data>

+  <data name="TimelineController_PostOperationDelete_NotExist" xml:space="preserve">

+    <value>The post to delete does not exist.</value>

+  </data>

+  <data name="TokenController_Create_BadCredential" xml:space="preserve">

+    <value>Username or password is invalid.</value>

+  </data>

+  <data name="TokenController_Verify_BadFormat" xml:space="preserve">

+    <value>The token is of bad format. It might not be created by the server.</value>

+  </data>

+  <data name="TokenController_Verify_OldVersion" xml:space="preserve">

+    <value>Token has an old version. User might have update some info.</value>

+  </data>

+  <data name="TokenController_Verify_TimeExpired" xml:space="preserve">

+    <value>The token is expired.</value>

+  </data>

+  <data name="TokenController_Verify_UserNotExist" xml:space="preserve">

+    <value>User does not exist. Administrator might have deleted this user.</value>

+  </data>

+  <data name="UserAvatar_BadFormat_BadSize" xml:space="preserve">

+    <value>Image is not a square.</value>

+  </data>

+  <data name="UserAvatar_BadFormat_CantDecode" xml:space="preserve">

+    <value>Image decode failed.</value>

+  </data>

+  <data name="UserAvatar_BadFormat_UnmatchedFormat" xml:space="preserve">

+    <value>Image format does not match the one in header.</value>

+  </data>

+  <data name="UserCommon_NotExist" xml:space="preserve">

+    <value>The user to operate on does not exist.</value>

+  </data>

+  <data name="UserController_ChangePassword_BadOldPassword" xml:space="preserve">

+    <value>Old password is wrong.</value>

+  </data>

+  <data name="UserController_ChangeUsername_Conflict" xml:space="preserve">

+    <value>The new username already exists.</value>

   </data>

 </root>
\ No newline at end of file
diff --git a/Timeline/Resources/Controllers/TokenController.zh.resx b/Timeline/Resources/Messages.zh.resx
index 51e0f25b..6e52befd 100644
--- a/Timeline/Resources/Controllers/TokenController.zh.resx
+++ b/Timeline/Resources/Messages.zh.resx
@@ -117,19 +117,73 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="ErrorBadCredential" xml:space="preserve">

+  <data name="Common_Content_TooBig" xml:space="preserve">

+    <value>请求体太大。它不能超过{0}.</value>

+  </data>

+  <data name="Common_Content_UnmatchedLength_Bigger" xml:space="preserve">

+    <value>实际的请求体长度比头中指示的大。</value>

+  </data>

+  <data name="Common_Content_UnmatchedLength_Smaller" xml:space="preserve">

+    <value>实际的请求体长度比头中指示的小。</value>

+  </data>

+  <data name="Common_Forbid" xml:space="preserve">

+    <value>你没有权限做此操作。</value>

+  </data>

+  <data name="Common_Header_ContentLength_Missing" xml:space="preserve">

+    <value>请求头Content-Length缺失或者格式不对。</value>

+  </data>

+  <data name="Common_Header_ContentLength_Zero" xml:space="preserve">

+    <value>请求头Content-Length不能为0。</value>

+  </data>

+  <data name="Common_Header_ContentType_Missing" xml:space="preserve">

+    <value>请求头Content-Type缺失。</value>

+  </data>

+  <data name="Common_Header_IfNonMatch_BadFormat" xml:space="preserve">

+    <value>请求头If-Non-Match格式不对。</value>

+  </data>

+  <data name="Common_InvalidModel" xml:space="preserve">

+    <value>请求模型格式不对。</value>

+  </data>

+  <data name="TimelineController_ChangeMember_UsernameBadFormat" xml:space="preserve">

+    <value>第{0}个做{1}操作的用户名格式错误。</value>

+  </data>

+  <data name="TimelineController_ChangeMember_UserNotExist" xml:space="preserve">

+    <value>第{0}个做{1}操作的用户不存在。</value>

+  </data>

+  <data name="TimelineController_PostOperationDelete_NotExist" xml:space="preserve">

+    <value>要删除的消息不存在。</value>

+  </data>

+  <data name="TokenController_Create_BadCredential" xml:space="preserve">

     <value>用户名或密码错误。</value>

   </data>

-  <data name="ErrorVerifyBadFormat" xml:space="preserve">

+  <data name="TokenController_Verify_BadFormat" xml:space="preserve">

     <value>符号格式错误。这个符号可能不是这个服务器创建的。</value>

   </data>

-  <data name="ErrorVerifyExpire" xml:space="preserve">

-    <value>符号过期了。</value>

-  </data>

-  <data name="ErrorVerifyOldVersion" xml:space="preserve">

+  <data name="TokenController_Verify_OldVersion" xml:space="preserve">

     <value>符号是一个旧版本。用户可能已经更新了信息。</value>

   </data>

-  <data name="ErrorVerifyUserNotExist" xml:space="preserve">

+  <data name="TokenController_Verify_TimeExpired" xml:space="preserve">

+    <value>符号过期了。</value>

+  </data>

+  <data name="TokenController_Verify_UserNotExist" xml:space="preserve">

     <value>用户不存在。管理员可能已经删除了这个用户。</value>

   </data>

+  <data name="UserAvatar_BadFormat_BadSize" xml:space="preserve">

+    <value>图片不是正方形。</value>

+  </data>

+  <data name="UserAvatar_BadFormat_CantDecode" xml:space="preserve">

+    <value>解码图片失败。</value>

+  </data>

+  <data name="UserAvatar_BadFormat_UnmatchedFormat" xml:space="preserve">

+    <value>图片格式与请求头中指示的不一样。</value>

+  </data>

+  <data name="UserCommon_NotExist" xml:space="preserve">

+    <value>要操作的用户不存在。</value>

+  </data>

+  <data name="UserController_ChangePassword_BadOldPassword" xml:space="preserve">

+    <value>旧密码错误。</value>

+  </data>

+  <data name="UserController_ChangeUsername_Conflict" xml:space="preserve">

+    <value>新用户名已经存在。</value>

+  </data>

 </root>
\ No newline at end of file
diff --git a/Timeline/Resources/Models/Http/Common.Designer.cs b/Timeline/Resources/Models/Http/Common.Designer.cs
index 4eebd2bc..5165463e 100644
--- a/Timeline/Resources/Models/Http/Common.Designer.cs
+++ b/Timeline/Resources/Models/Http/Common.Designer.cs
@@ -61,33 +61,6 @@ namespace Timeline.Resources.Models.Http {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to Body is too big. It can&apos;t be bigger than {0}..

-        /// </summary>

-        internal static string MessageContentTooBig {

-            get {

-                return ResourceManager.GetString("MessageContentTooBig", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Actual body length is bigger than it in header..

-        /// </summary>

-        internal static string MessageContentUnmatchedLengthBigger {

-            get {

-                return ResourceManager.GetString("MessageContentUnmatchedLengthBigger", resourceCulture);

-            }

-        }

-        

-        /// <summary>

-        ///   Looks up a localized string similar to Actual body length is smaller than it in header..

-        /// </summary>

-        internal static string MessageContentUnmatchedLengthSmaller {

-            get {

-                return ResourceManager.GetString("MessageContentUnmatchedLengthSmaller", resourceCulture);

-            }

-        }

-        

-        /// <summary>

         ///   Looks up a localized string similar to An existent item is deleted..

         /// </summary>

         internal static string MessageDeleteDelete {

@@ -106,15 +79,6 @@ namespace Timeline.Resources.Models.Http {
         }

         

         /// <summary>

-        ///   Looks up a localized string similar to Header If-Non-Match is of bad format..

-        /// </summary>

-        internal static string MessageHeaderIfNonMatchBad {

-            get {

-                return ResourceManager.GetString("MessageHeaderIfNonMatchBad", resourceCulture);

-            }

-        }

-        

-        /// <summary>

         ///   Looks up a localized string similar to A new item is created..

         /// </summary>

         internal static string MessagePutCreate {

diff --git a/Timeline/Resources/Models/Http/Common.resx b/Timeline/Resources/Models/Http/Common.resx
index 540c6c58..85ec4d32 100644
--- a/Timeline/Resources/Models/Http/Common.resx
+++ b/Timeline/Resources/Models/Http/Common.resx
@@ -117,24 +117,12 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="MessageContentTooBig" xml:space="preserve">

-    <value>Body is too big. It can't be bigger than {0}.</value>

-  </data>

-  <data name="MessageContentUnmatchedLengthBigger" xml:space="preserve">

-    <value>Actual body length is bigger than it in header.</value>

-  </data>

-  <data name="MessageContentUnmatchedLengthSmaller" xml:space="preserve">

-    <value>Actual body length is smaller than it in header.</value>

-  </data>

   <data name="MessageDeleteDelete" xml:space="preserve">

     <value>An existent item is deleted.</value>

   </data>

   <data name="MessageDeleteNotExist" xml:space="preserve">

     <value>The item does not exist, so nothing is changed.</value>

   </data>

-  <data name="MessageHeaderIfNonMatchBad" xml:space="preserve">

-    <value>Header If-Non-Match is of bad format.</value>

-  </data>

   <data name="MessagePutCreate" xml:space="preserve">

     <value>A new item is created.</value>

   </data>

diff --git a/Timeline/Resources/Models/Http/Common.zh.resx b/Timeline/Resources/Models/Http/Common.zh.resx
index 467916a2..de74ac3b 100644
--- a/Timeline/Resources/Models/Http/Common.zh.resx
+++ b/Timeline/Resources/Models/Http/Common.zh.resx
@@ -117,24 +117,12 @@
   <resheader name="writer">

     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>

   </resheader>

-  <data name="MessageContentTooBig" xml:space="preserve">

-    <value>请求体太大。它不能超过{0}.</value>

-  </data>

-  <data name="MessageContentUnmatchedLengthBigger" xml:space="preserve">

-    <value>实际的请求体长度比头中指示的大。</value>

-  </data>

-  <data name="MessageContentUnmatchedLengthSmaller" xml:space="preserve">

-    <value>实际的请求体长度比头中指示的小。</value>

-  </data>

   <data name="MessageDeleteDelete" xml:space="preserve">

     <value>删除了一个项目。</value>

   </data>

   <data name="MessageDeleteNotExist" xml:space="preserve">

     <value>要删除的项目不存在，什么都没有修改。</value>

   </data>

-  <data name="MessageHeaderIfNonMatchBad" xml:space="preserve">

-    <value>请求头If-Non-Match格式不对。</value>

-  </data>

   <data name="MessagePutCreate" xml:space="preserve">

     <value>创建了一个新项目。</value>

   </data>

diff --git a/Timeline/Timeline.csproj b/Timeline/Timeline.csproj
index 681f49cb..27897177 100644
--- a/Timeline/Timeline.csproj
+++ b/Timeline/Timeline.csproj
@@ -33,16 +33,15 @@
     </ItemGroup>

 

     <ItemGroup>

+      <ProjectReference Include="..\Timeline.ErrorCodes\Timeline.ErrorCodes.csproj" />

+    </ItemGroup>

+

+    <ItemGroup>

         <Compile Update="Resources\Authentication\AuthHandler.Designer.cs">

             <DesignTime>True</DesignTime>

             <AutoGen>True</AutoGen>

             <DependentUpon>AuthHandler.resx</DependentUpon>

         </Compile>

-        <Compile Update="Resources\Common.Designer.cs">

-            <DesignTime>True</DesignTime>

-            <AutoGen>True</AutoGen>

-            <DependentUpon>Common.resx</DependentUpon>

-        </Compile>

         <Compile Update="Resources\Controllers\Testing\TestingI18nController.Designer.cs">

             <DesignTime>True</DesignTime>

             <AutoGen>True</AutoGen>

@@ -73,6 +72,11 @@
             <AutoGen>True</AutoGen>

             <DependentUpon>Filters.resx</DependentUpon>

         </Compile>

+        <Compile Update="Resources\Messages.Designer.cs">

+          <DesignTime>True</DesignTime>

+          <AutoGen>True</AutoGen>

+          <DependentUpon>Messages.resx</DependentUpon>

+        </Compile>

         <Compile Update="Resources\Models\Http\Common.Designer.cs">

             <DesignTime>True</DesignTime>

             <AutoGen>True</AutoGen>

@@ -115,10 +119,6 @@
             <Generator>ResXFileCodeGenerator</Generator>

             <LastGenOutput>AuthHandler.Designer.cs</LastGenOutput>

         </EmbeddedResource>

-        <EmbeddedResource Update="Resources\Common.resx">

-            <Generator>ResXFileCodeGenerator</Generator>

-            <LastGenOutput>Common.Designer.cs</LastGenOutput>

-        </EmbeddedResource>

         <EmbeddedResource Update="Resources\Controllers\Testing\TestingI18nController.resx">

             <Generator>ResXFileCodeGenerator</Generator>

             <LastGenOutput>TestingI18nController.Designer.cs</LastGenOutput>

@@ -144,6 +144,10 @@
             <Generator>ResXFileCodeGenerator</Generator>

             <LastGenOutput>Filters.Designer.cs</LastGenOutput>

         </EmbeddedResource>

+        <EmbeddedResource Update="Resources\Messages.resx">

+          <Generator>ResXFileCodeGenerator</Generator>

+          <LastGenOutput>Messages.Designer.cs</LastGenOutput>

+        </EmbeddedResource>

         <EmbeddedResource Update="Resources\Models\Http\Common.resx">

             <Generator>ResXFileCodeGenerator</Generator>

             <LastGenOutput>Common.Designer.cs</LastGenOutput>