backend/IM_API/Hubs/ChatHub.cs

@@ -0,0 +1,27 @@
+using IM_API.Interface.Services;
+using Microsoft.AspNetCore.SignalR;
+using System.Security.Claims;
+
+namespace IM_API.Hubs
+{
+    public class ChatHub:Hub
+    {
+        private IJWTService _JWTService;
+        public ChatHub(IJWTService jWTService)
+        {
+            _JWTService = jWTService;
+        }
+
+        public override Task OnConnectedAsync()
+        {
+            var userIdStr = Context.User.FindFirstValue(ClaimTypes.NameIdentifier);
+            int userId = int.Parse(userIdStr);
+            Console.WriteLine(userId);
+            return base.OnConnectedAsync();
+        }
+        public async Task SendMessage(string user,string message)
+        {
+            await Clients.Caller.SendAsync("ReceiveMessage", "qwfqwfqw","test");
+        }
+    }
+}

backend/IM_API/IM_API.csproj

@@ -13,6 +13,7 @@
     <PackageReference Include="AutoMapper" Version="12.0.1" />
     <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="12.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="8.0.21" />
+    <PackageReference Include="Microsoft.AspNetCore.SignalR" Version="1.2.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.21">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

backend/IM_API/Program.cs

@@ -1,5 +1,6 @@
 
 using IM_API.Configs;
+using IM_API.Hubs;
 using IM_API.Models;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.EntityFrameworkCore;
@@ -42,7 +43,6 @@ namespace IM_API
                     policy.AllowAnyHeader()
                     .AllowAnyMethod()
                     .AllowAnyHeader()
-                    .AllowAnyOrigin()
                     .AllowAnyOrigin();
                 });
             });
@@ -104,6 +104,8 @@ namespace IM_API
 
             var app = builder.Build();
 
+            app.UseCors();
+
             // Configure the HTTP request pipeline.
             if (app.Environment.IsDevelopment())
             {
@@ -120,6 +122,8 @@ namespace IM_API
 
             app.MapControllers();
 
+            app.MapHub<ChatHub>("/chat").RequireCors();
+
             app.Run();
         }
     }

backend/SignalRTest/.vs/SignalRTest/v17/DocumentLayout.backup.json

@@ -0,0 +1,57 @@
+{
+  "Version": 1,
+  "WorkspaceRootPath": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\",
+  "Documents": [
+    {
+      "AbsoluteMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}|Form",
+      "RelativeMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|solutionrelative:form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}|Form"
+    },
+    {
+      "AbsoluteMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|c:\\users\\nanxun\\documents\\im\\backend\\signalrtest\\form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}",
+      "RelativeMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|solutionrelative:form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}"
+    }
+  ],
+  "DocumentGroupContainers": [
+    {
+      "Orientation": 0,
+      "VerticalTabListWidth": 256,
+      "DocumentGroups": [
+        {
+          "DockedWidth": 200,
+          "SelectedChildIndex": 1,
+          "Children": [
+            {
+              "$type": "Bookmark",
+              "Name": "ST:0:0:{1c4feeaa-4718-4aa9-859d-94ce25d182ba}"
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 0,
+              "Title": "Form1.cs [\u8BBE\u8BA1]",
+              "DocumentMoniker": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs",
+              "RelativeDocumentMoniker": "Form1.cs",
+              "ToolTip": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs [\u8BBE\u8BA1]",
+              "RelativeToolTip": "Form1.cs [\u8BBE\u8BA1]",
+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000738|",
+              "WhenOpened": "2025-12-06T07:30:28.584Z",
+              "EditorCaption": " [\u8BBE\u8BA1]"
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 1,
+              "Title": "Form1.cs",
+              "DocumentMoniker": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs",
+              "RelativeDocumentMoniker": "Form1.cs",
+              "ToolTip": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs",
+              "RelativeToolTip": "Form1.cs",
+              "ViewState": "AgIAAA4AAAAAAAAAAAAuwBQAAAAJAAAAAAAAAA==",
+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000738|",
+              "WhenOpened": "2025-12-06T07:28:32.613Z",
+              "EditorCaption": ""
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}

backend/SignalRTest/.vs/SignalRTest/v17/DocumentLayout.json

@@ -0,0 +1,57 @@
+{
+  "Version": 1,
+  "WorkspaceRootPath": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\",
+  "Documents": [
+    {
+      "AbsoluteMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}|Form",
+      "RelativeMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|solutionrelative:form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}|Form"
+    },
+    {
+      "AbsoluteMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|c:\\users\\nanxun\\documents\\im\\backend\\signalrtest\\form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}",
+      "RelativeMoniker": "D:0:0:{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}|SignalRTest.csproj|solutionrelative:form1.cs||{A6C744A8-0E4A-4FC6-886A-064283054674}"
+    }
+  ],
+  "DocumentGroupContainers": [
+    {
+      "Orientation": 0,
+      "VerticalTabListWidth": 256,
+      "DocumentGroups": [
+        {
+          "DockedWidth": 200,
+          "SelectedChildIndex": 1,
+          "Children": [
+            {
+              "$type": "Bookmark",
+              "Name": "ST:0:0:{1c4feeaa-4718-4aa9-859d-94ce25d182ba}"
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 0,
+              "Title": "Form1.cs [\u8BBE\u8BA1]",
+              "DocumentMoniker": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs",
+              "RelativeDocumentMoniker": "Form1.cs",
+              "ToolTip": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs [\u8BBE\u8BA1]",
+              "RelativeToolTip": "Form1.cs [\u8BBE\u8BA1]",
+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000738|",
+              "WhenOpened": "2025-12-06T07:30:28.584Z",
+              "EditorCaption": " [\u8BBE\u8BA1]"
+            },
+            {
+              "$type": "Document",
+              "DocumentIndex": 1,
+              "Title": "Form1.cs",
+              "DocumentMoniker": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs",
+              "RelativeDocumentMoniker": "Form1.cs",
+              "ToolTip": "C:\\Users\\nanxun\\Documents\\IM\\backend\\SignalRTest\\Form1.cs",
+              "RelativeToolTip": "Form1.cs",
+              "ViewState": "AgIAAA4AAAAAAAAAAAAuwBQAAAAJAAAAAAAAAA==",
+              "Icon": "ae27a6b0-e345-4288-96df-5eaf394ee369.000738|",
+              "WhenOpened": "2025-12-06T07:28:32.613Z",
+              "EditorCaption": ""
+            }
+          ]
+        }
+      ]
+    }
+  ]
+}

backend/SignalRTest/Form1.Designer.cs

@@ -0,0 +1,206 @@
+namespace SignalRTest
+{
+    partial class Form1
+    {
+        /// <summary>
+        ///  Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        ///  Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        ///  Required method for Designer support - do not modify
+        ///  the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            components = new System.ComponentModel.Container();
+            button1 = new Button();
+            button2 = new Button();
+            txtUrl = new TextBox();
+            TokenTxt = new TextBox();
+            UrlLab = new Label();
+            label2 = new Label();
+            Historylab = new RichTextBox();
+            label3 = new Label();
+            MethodTxt = new TextBox();
+            label4 = new Label();
+            SendMsg = new Button();
+            ParamsTxt = new TextBox();
+            label5 = new Label();
+            toolTip1 = new ToolTip(components);
+            SuspendLayout();
+            // 
+            // button1
+            // 
+            button1.Location = new Point(143, 294);
+            button1.Name = "button1";
+            button1.Size = new Size(94, 29);
+            button1.TabIndex = 0;
+            button1.Text = "连接";
+            button1.UseVisualStyleBackColor = true;
+            button1.Click += button1_Click;
+            // 
+            // button2
+            // 
+            button2.Location = new Point(278, 294);
+            button2.Name = "button2";
+            button2.Size = new Size(94, 29);
+            button2.TabIndex = 1;
+            button2.Text = "断开连接";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += button2_Click;
+            // 
+            // txtUrl
+            // 
+            txtUrl.Location = new Point(112, 39);
+            txtUrl.Name = "txtUrl";
+            txtUrl.Size = new Size(303, 27);
+            txtUrl.TabIndex = 2;
+            txtUrl.Text = "http://localhost:5202/chat";
+            // 
+            // TokenTxt
+            // 
+            TokenTxt.Location = new Point(553, 39);
+            TokenTxt.Name = "TokenTxt";
+            TokenTxt.Size = new Size(125, 27);
+            TokenTxt.TabIndex = 3;
+            // 
+            // UrlLab
+            // 
+            UrlLab.AutoSize = true;
+            UrlLab.Location = new Point(31, 42);
+            UrlLab.Name = "UrlLab";
+            UrlLab.Size = new Size(38, 20);
+            UrlLab.TabIndex = 4;
+            UrlLab.Text = "URL";
+            // 
+            // label2
+            // 
+            label2.AutoSize = true;
+            label2.Location = new Point(475, 42);
+            label2.Name = "label2";
+            label2.Size = new Size(69, 20);
+            label2.TabIndex = 5;
+            label2.Text = "登录凭证";
+            // 
+            // Historylab
+            // 
+            Historylab.Location = new Point(112, 85);
+            Historylab.Name = "Historylab";
+            Historylab.Size = new Size(303, 188);
+            Historylab.TabIndex = 6;
+            Historylab.Text = "";
+            // 
+            // label3
+            // 
+            label3.AutoSize = true;
+            label3.Location = new Point(16, 165);
+            label3.Name = "label3";
+            label3.Size = new Size(69, 20);
+            label3.TabIndex = 7;
+            label3.Text = "消息历史";
+            // 
+            // MethodTxt
+            // 
+            MethodTxt.Location = new Point(553, 182);
+            MethodTxt.Name = "MethodTxt";
+            MethodTxt.Size = new Size(125, 27);
+            MethodTxt.TabIndex = 8;
+            toolTip1.SetToolTip(MethodTxt, "后端hub内对应方法名，大小写敏感");
+            // 
+            // label4
+            // 
+            label4.AutoSize = true;
+            label4.Location = new Point(475, 182);
+            label4.Name = "label4";
+            label4.Size = new Size(39, 20);
+            label4.TabIndex = 9;
+            label4.Text = "方法";
+            toolTip1.SetToolTip(label4, "后端hub内对应方法名，大小写敏感");
+            // 
+            // SendMsg
+            // 
+            SendMsg.Location = new Point(705, 244);
+            SendMsg.Name = "SendMsg";
+            SendMsg.Size = new Size(94, 29);
+            SendMsg.TabIndex = 10;
+            SendMsg.Text = "发送";
+            SendMsg.UseVisualStyleBackColor = true;
+            SendMsg.Click += SendMsg_Click;
+            // 
+            // ParamsTxt
+            // 
+            ParamsTxt.Location = new Point(553, 246);
+            ParamsTxt.Name = "ParamsTxt";
+            ParamsTxt.Size = new Size(125, 27);
+            ParamsTxt.TabIndex = 11;
+            toolTip1.SetToolTip(ParamsTxt, "hub方法对应参数，请使用以下格式:[参数1,参数2,参数3,...]");
+            // 
+            // label5
+            // 
+            label5.AutoSize = true;
+            label5.Location = new Point(475, 253);
+            label5.Name = "label5";
+            label5.Size = new Size(39, 20);
+            label5.TabIndex = 12;
+            label5.Text = "参数";
+            toolTip1.SetToolTip(label5, "hub方法对应参数，请使用以下格式:[参数1,参数2,参数3,...]");
+            // 
+            // Form1
+            // 
+            AutoScaleDimensions = new SizeF(9F, 20F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(label5);
+            Controls.Add(ParamsTxt);
+            Controls.Add(SendMsg);
+            Controls.Add(label4);
+            Controls.Add(MethodTxt);
+            Controls.Add(label3);
+            Controls.Add(Historylab);
+            Controls.Add(label2);
+            Controls.Add(UrlLab);
+            Controls.Add(TokenTxt);
+            Controls.Add(txtUrl);
+            Controls.Add(button2);
+            Controls.Add(button1);
+            Name = "Form1";
+            Text = "SignalR调试工具";
+            Load += Form1_Load;
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Button button1;
+        private Button button2;
+        private TextBox txtUrl;
+        private TextBox TokenTxt;
+        private Label UrlLab;
+        private Label label2;
+        private RichTextBox Historylab;
+        private Label label3;
+        private TextBox MethodTxt;
+        private Label label4;
+        private Button SendMsg;
+        private TextBox ParamsTxt;
+        private Label label5;
+        private ToolTip toolTip1;
+    }
+}

backend/SignalRTest/Form1.cs

@@ -0,0 +1,143 @@
+using Microsoft.AspNetCore.SignalR.Client;
+using System.Text.Json;
+using System.Windows.Forms;
+
+namespace SignalRTest
+{
+    public partial class Form1 : Form
+    {
+        private HubConnection _connection;
+        public Form1()
+        {
+            InitializeComponent();
+        }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+
+        }
+
+        private async void button1_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _connection = new HubConnectionBuilder()
+                    .WithUrl(txtUrl.Text, options =>
+                    {
+                        options.AccessTokenProvider = () =>
+                        Task.FromResult(TokenTxt.Text);
+                    })
+                    .WithAutomaticReconnect()
+                    .Build();
+
+                _connection.On<string, string>("ReceiveMessage", (user, message) =>
+                {
+                    Historylab.Invoke(new Action(() =>
+                    {
+                        // 移动光标到文本末尾
+                        Historylab.SelectionStart = Historylab.TextLength;
+                        Historylab.SelectionLength = 0;
+
+                        Historylab.SelectionColor = Color.Green;
+                        Historylab.AppendText("接收消息：" + message + "\n");
+                    }));
+                });
+
+                _connection.Reconnecting += (ex) =>
+                {
+                    // 移动光标到文本末尾
+                    Historylab.SelectionStart = Historylab.TextLength;
+                    Historylab.SelectionLength = 0;
+
+                    Historylab.SelectionColor = Color.Blue;
+                    Historylab.AppendText("重连中..." + "\n");
+                    return System.Threading.Tasks.Task.CompletedTask;
+                };
+
+                _connection.Reconnected += (id) =>
+                {
+                    // 移动光标到文本末尾
+                    Historylab.SelectionStart = Historylab.TextLength;
+                    Historylab.SelectionLength = 0;
+
+                    Historylab.SelectionColor = Color.Blue;
+                    Historylab.AppendText("重连成功！" + "\n");
+                    return System.Threading.Tasks.Task.CompletedTask;
+                };
+
+                await _connection.StartAsync();
+                // 移动光标到文本末尾
+                Historylab.SelectionStart = Historylab.TextLength;
+                Historylab.SelectionLength = 0;
+
+                Historylab.SelectionColor = Color.Blue;
+                Historylab.AppendText("连接成功！" + "\n");
+            }
+            catch (Exception ex)
+            {
+                // 移动光标到文本末尾
+                Historylab.SelectionStart = Historylab.TextLength;
+                Historylab.SelectionLength = 0;
+
+                Historylab.SelectionColor = Color.Blue;
+                Historylab.AppendText("连接失败：" + ex.Message + "\n");
+            }
+        }
+
+        private async void button2_Click(object sender, EventArgs e)
+        {
+            if (_connection != null)
+            {
+                await _connection.StopAsync();
+                await _connection.DisposeAsync();
+                // 移动光标到文本末尾
+                Historylab.SelectionStart = Historylab.TextLength;
+                Historylab.SelectionLength = 0;
+
+                Historylab.SelectionColor = Color.Blue;
+                Historylab.AppendText("断开连接！" + "\n");
+            }
+        }
+
+        private async void SendMsg_Click(object sender, EventArgs e)
+        {
+            if (_connection == null || _connection.State != HubConnectionState.Connected)
+            {
+                // 移动光标到文本末尾
+                Historylab.SelectionStart = Historylab.TextLength;
+                Historylab.SelectionLength = 0;
+
+                Historylab.SelectionColor = Color.Blue;
+                Historylab.AppendText("请先连接！" + "\n");
+                return;
+            }
+
+            try
+            {
+                var method = MethodTxt.Text.Trim();
+                var paramText = ParamsTxt.Text.Trim();
+
+                object[] parameters = string.IsNullOrWhiteSpace(paramText)
+                    ? Array.Empty<object>()
+                    : JsonSerializer.Deserialize<object[]>(paramText);
+                // 移动光标到文本末尾
+                Historylab.SelectionStart = Historylab.TextLength;
+                Historylab.SelectionLength = 0;
+
+                Historylab.SelectionColor = Color.Red;
+                Historylab.AppendText($"Invoke: {method} {paramText}" + "\n");
+                await _connection.InvokeCoreAsync(method,parameters);
+                
+            }
+            catch (Exception ex)
+            {
+                // 移动光标到文本末尾
+                Historylab.SelectionStart = Historylab.TextLength;
+                Historylab.SelectionLength = 0;
+
+                Historylab.SelectionColor = Color.Blue;
+                Historylab.AppendText($"发送失败: {ex.Message}" + "\n");
+            }
+        }
+    }
+}

backend/SignalRTest/Form1.resx

@@ -0,0 +1,123 @@
+<?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>
+  <metadata name="toolTip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
+</root>

backend/SignalRTest/Program.cs

@@ -0,0 +1,17 @@
+namespace SignalRTest
+{
+    internal static class Program
+    {
+        /// <summary>
+        ///  The main entry point for the application.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            // To customize application configuration such as set high DPI settings or default font,
+            // see https://aka.ms/applicationconfiguration.
+            ApplicationConfiguration.Initialize();
+            Application.Run(new Form1());
+        }
+    }
+}

backend/SignalRTest/Properties/PublishProfiles/FolderProfile.pubxml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- https://go.microsoft.com/fwlink/?LinkID=208121. -->
+<Project>
+  <PropertyGroup>
+    <Configuration>Release</Configuration>
+    <Platform>Any CPU</Platform>
+    <PublishDir>bin\Release\net8.0-windows\publish\win-x64\</PublishDir>
+    <PublishProtocol>FileSystem</PublishProtocol>
+    <_TargetId>Folder</_TargetId>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <SelfContained>true</SelfContained>
+    <PublishSingleFile>true</PublishSingleFile>
+    <PublishReadyToRun>false</PublishReadyToRun>
+  </PropertyGroup>
+</Project>

backend/SignalRTest/Properties/PublishProfiles/FolderProfile.pubxml.user

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- https://go.microsoft.com/fwlink/?LinkID=208121. -->
+<Project>
+  <PropertyGroup>
+    <History>True|2025-12-06T11:34:00.2606316Z||;True|2025-12-06T19:25:07.4627450+08:00||;</History>
+    <LastFailureDetails />
+  </PropertyGroup>
+</Project>

backend/SignalRTest/SignalRTest.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.SignalR.Client" Version="10.0.0" />
+  </ItemGroup>
+
+</Project>

backend/SignalRTest/SignalRTest.csproj.user

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <_LastSelectedProfileId>C:\Users\nanxun\Documents\IM\backend\SignalRTest\Properties\PublishProfiles\FolderProfile.pubxml</_LastSelectedProfileId>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Update="Form1.cs">
+      <SubType>Form</SubType>
+    </Compile>
+  </ItemGroup>
+</Project>

backend/SignalRTest/SignalRTest.sln

@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36408.4 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SignalRTest", "SignalRTest.csproj", "{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{266B86EE-17CF-4DD4-84C8-8CE3E2640A70}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {2D41DBBA-147E-49F2-A781-E7CD9E85666F}
+	EndGlobalSection
+EndGlobal

backend/SignalRTest/bin/Debug/net8.0-windows/SignalRTest.deps.json

@@ -0,0 +1,419 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v8.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v8.0": {
+      "SignalRTest/1.0.0": {
+        "dependencies": {
+          "Microsoft.AspNetCore.SignalR.Client": "10.0.0"
+        },
+        "runtime": {
+          "SignalRTest.dll": {}
+        }
+      },
+      "Microsoft.AspNetCore.Connections.Abstractions/10.0.0": {
+        "dependencies": {
+          "Microsoft.Bcl.AsyncInterfaces": "10.0.0",
+          "Microsoft.Extensions.Features": "10.0.0",
+          "System.IO.Pipelines": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.1/Microsoft.AspNetCore.Connections.Abstractions.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.AspNetCore.Http.Connections.Client/10.0.0": {
+        "dependencies": {
+          "Microsoft.AspNetCore.Http.Connections.Common": "10.0.0",
+          "Microsoft.Extensions.Logging.Abstractions": "10.0.0",
+          "Microsoft.Extensions.Options": "10.0.0",
+          "System.Net.ServerSentEvents": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.1/Microsoft.AspNetCore.Http.Connections.Client.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.AspNetCore.Http.Connections.Common/10.0.0": {
+        "dependencies": {
+          "Microsoft.AspNetCore.Connections.Abstractions": "10.0.0",
+          "System.Text.Json": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.0/Microsoft.AspNetCore.Http.Connections.Common.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.AspNetCore.SignalR.Client/10.0.0": {
+        "dependencies": {
+          "Microsoft.AspNetCore.Http.Connections.Client": "10.0.0",
+          "Microsoft.AspNetCore.SignalR.Client.Core": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.0/Microsoft.AspNetCore.SignalR.Client.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.AspNetCore.SignalR.Client.Core/10.0.0": {
+        "dependencies": {
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+          "Microsoft.AspNetCore.SignalR.Protocols.Json": "10.0.0",
+          "Microsoft.Bcl.TimeProvider": "10.0.0",
+          "Microsoft.Extensions.DependencyInjection": "10.0.0",
+          "Microsoft.Extensions.Logging": "10.0.0",
+          "System.Threading.Channels": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.1/Microsoft.AspNetCore.SignalR.Client.Core.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.AspNetCore.SignalR.Common/10.0.0": {
+        "dependencies": {
+          "Microsoft.AspNetCore.Connections.Abstractions": "10.0.0",
+          "Microsoft.Extensions.Options": "10.0.0",
+          "System.Text.Json": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.0/Microsoft.AspNetCore.SignalR.Common.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.AspNetCore.SignalR.Protocols.Json/10.0.0": {
+        "dependencies": {
+          "Microsoft.AspNetCore.SignalR.Common": "10.0.0"
+        },
+        "runtime": {
+          "lib/netstandard2.0/Microsoft.AspNetCore.SignalR.Protocols.Json.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.Bcl.AsyncInterfaces/10.0.0": {
+        "runtime": {
+          "lib/netstandard2.1/Microsoft.Bcl.AsyncInterfaces.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.Bcl.TimeProvider/10.0.0": {
+        "runtime": {
+          "lib/net8.0/Microsoft.Bcl.TimeProvider.dll": {
+            "assemblyVersion": "10.0.0.0",
+            "fileVersion": "10.0.25.52411"
+          }
+        }
+      },
+      "Microsoft.Extensions.DependencyInjection/10.0.0": {
+        "dependencies": {
+          "Microsoft.Extensions.DependencyInjection.Abstractions": "10.0.0"
+        },
+        "runtime": {
+          "lib/net8.0/Microsoft.Extensions.DependencyInjection.dll": {
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+            "fileVersion": "10.0.25.52411"
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+        }
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backend/SignalRTest/bin/Debug/net8.0-windows/SignalRTest.runtimeconfig.json

@@ -0,0 +1,19 @@
+{
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+    "frameworks": [
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+}

backend/SignalRTest/bin/Release/net8.0-windows/SignalRTest.deps.json

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+      "sha512": "sha512-0KdBK+h7G13PuOSC2R/DalAoFMvdYMznvGRuICtkdcUMXgl/gYXsG6z4yUvTxHSMACorWgHCU1Faq0KUHU6yAQ==",
+      "path": "system.diagnostics.diagnosticsource/10.0.0",
+      "hashPath": "system.diagnostics.diagnosticsource.10.0.0.nupkg.sha512"
+    },
+    "System.IO.Pipelines/10.0.0": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-M1eb3nfXntaRJPrrMVM9EFS8I1bDTnt0uvUS6QP/SicZf/ZZjydMD5NiXxfmwW/uQwaMDP/yX2P+zQN1NBHChg==",
+      "path": "system.io.pipelines/10.0.0",
+      "hashPath": "system.io.pipelines.10.0.0.nupkg.sha512"
+    },
+    "System.Net.ServerSentEvents/10.0.0": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-zRH5XXZfenw7bgn8BT+q6XH1Sp75kSQM5m7Ee4WzZhMu2syGawcsqdlfFa2u/+skXr/u2ufp9F6M9lgkKkfZZg==",
+      "path": "system.net.serversentevents/10.0.0",
+      "hashPath": "system.net.serversentevents.10.0.0.nupkg.sha512"
+    },
+    "System.Text.Encodings.Web/10.0.0": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-257hh1ep1Gqm1Lm0ulxf7vVBVMJuGN6EL4xSWjpi46DffXzm1058IiWsfSC06zSm7SniN+Tb5160UnXsSa8rRg==",
+      "path": "system.text.encodings.web/10.0.0",
+      "hashPath": "system.text.encodings.web.10.0.0.nupkg.sha512"
+    },
+    "System.Text.Json/10.0.0": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-1Dpjwq9peG/Wt5BNbrzIhTpclfOSqBWZsUO28vVr59yQlkvL5jLBWfpfzRmJ1OY+6DciaY0DUcltyzs4fuZHjw==",
+      "path": "system.text.json/10.0.0",
+      "hashPath": "system.text.json.10.0.0.nupkg.sha512"
+    },
+    "System.Threading.Channels/10.0.0": {
+      "type": "package",
+      "serviceable": true,
+      "sha512": "sha512-fwRdkJpKisUEVNaEdsL5w5EwidzuVw0BOTfzDvYB1Yg8sq1pqNfUZxBOVFgSj6i6tNhpT3HP8BEDXf1+kFkTDA==",
+      "path": "system.threading.channels/10.0.0",
+      "hashPath": "system.threading.channels.10.0.0.nupkg.sha512"
+    }
+  }
+}

backend/SignalRTest/bin/Release/net8.0-windows/SignalRTest.runtimeconfig.json

@@ -0,0 +1,20 @@
+{
+  "runtimeOptions": {
+    "tfm": "net8.0",
+    "frameworks": [
+      {
+        "name": "Microsoft.NETCore.App",
+        "version": "8.0.0"
+      },
+      {
+        "name": "Microsoft.WindowsDesktop.App",
+        "version": "8.0.0"
+      }
+    ],
+    "configProperties": {
+      "System.Reflection.Metadata.MetadataUpdater.IsSupported": false,
+      "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": true,
+      "CSWINRT_USE_WINDOWS_UI_XAML_PROJECTIONS": false
+    }
+  }
+}