Fixed WebAPI

Upgraded to .NET8.0
Fixed logging (removed Console replaced with Ilogger)
Fixed warnings (Null Strings, etc).

The application now returns data from the back-end chat services.

LLama.WebAPI/LLama.WebAPI.csproj

@@ -1,25 +1,27 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
-  <Import Project="..\LLama\LLamaSharp.Runtime.targets" />
-  <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.VisualStudio.Validation" Version="17.8.8" />
-    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\LLama\LLamaSharp.csproj" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <Content Update="Properties\launchSettings.json">
-      <ExcludeFromSingleFile>true</ExcludeFromSingleFile>
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
-    </Content>
-  </ItemGroup>
-</Project>
+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <Import Project="..\LLama\LLamaSharp.Runtime.targets" />
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <InvariantGlobalization>true</InvariantGlobalization>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.VisualStudio.Validation" Version="17.8.8" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.0" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\LLama\LLamaSharp.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Update="Properties\launchSettings.json">
+      <ExcludeFromSingleFile>true</ExcludeFromSingleFile>
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
+    </Content>
+  </ItemGroup>
+</Project>

LLama.WebAPI/Models/SendMessageInput.cs

@@ -2,15 +2,15 @@
 
 public class SendMessageInput
 {
-    public string Text { get; set; }
+    public string Text { get; set; } = "";
 }
 
 public class HistoryInput
 {
-    public List<HistoryItem> Messages { get; set; }
+    public List<HistoryItem> Messages { get; set; } = [];
     public class HistoryItem
     {
-        public string Role { get; set; }
-        public string Content { get; set; }
+        public string Role { get; set; } = "User";
+        public string Content { get; set; } = "";
     }
 }

LLama.WebAPI/Program.cs

@@ -1,28 +1,32 @@
-using LLama.WebAPI.Services;
-
-var builder = WebApplication.CreateBuilder(args);
-
-// Add services to the container.
-
-builder.Services.AddControllers();
-// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
-builder.Services.AddEndpointsApiExplorer();
-builder.Services.AddSwaggerGen();
-
-builder.Services.AddSingleton<StatefulChatService>();
-builder.Services.AddScoped<StatelessChatService>();
-
-var app = builder.Build();
-
-// Configure the HTTP request pipeline.
-if (app.Environment.IsDevelopment())
-{
-    app.UseSwagger();
-    app.UseSwaggerUI();
-}
-
-app.UseAuthorization();
-
-app.MapControllers();
-
-app.Run();
+using LLama.WebAPI.Services;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+builder.Services.AddSingleton<StatefulChatService>();
+builder.Services.AddScoped<StatelessChatService>();
+
+var app = builder.Build();
+app.UseRouting();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseAuthorization();
+
+app.UseEndpoints(endpoints =>
+{
+    _ = endpoints.MapControllers();
+});
+
+app.Run();

LLama.WebAPI/Services/StatefulChatService.cs

@@ -9,13 +9,14 @@ public class StatefulChatService : IDisposable
 {
     private readonly ChatSession _session;
     private readonly LLamaContext _context;
+    private readonly ILogger<StatefulChatService> _logger;
     private bool _continue = false;
 
     private const string SystemPrompt = "Transcript of a dialog, where the User interacts with an Assistant. Assistant is helpful, kind, honest, good at writing, and never fails to answer the User's requests immediately and with precision.";
 
-    public StatefulChatService(IConfiguration configuration)
+    public StatefulChatService(IConfiguration configuration, ILogger<StatefulChatService> logger)
     {
-        var @params = new Common.ModelParams(configuration["ModelPath"])
+        var @params = new Common.ModelParams(configuration["ModelPath"]!)
         {
             ContextSize = 512,
         };
@@ -23,6 +24,7 @@ public class StatefulChatService : IDisposable
         // todo: share weights from a central service
         using var weights = LLamaWeights.LoadFromFile(@params);
 
+        _logger = logger;
         _context = new LLamaContext(weights, @params);
 
         _session = new ChatSession(new InteractiveExecutor(_context));
@@ -36,16 +38,13 @@ public class StatefulChatService : IDisposable
 
     public async Task<string> Send(SendMessageInput input)
     {
+
         if (!_continue)
         {
-            Console.Write(SystemPrompt);
+            _logger.LogInformation("Prompt: {text}", SystemPrompt);
             _continue = true;
         }
-
-        Console.ForegroundColor = ConsoleColor.Green;
-        Console.Write(input.Text);
-
-        Console.ForegroundColor = ConsoleColor.White;
+        _logger.LogInformation("Input: {text}", input.Text);
         var outputs = _session.ChatAsync(
             new Common.ChatHistory.Message(Common.AuthorRole.User, input.Text),
             new Common.InferenceParams()
@@ -57,7 +56,7 @@ public class StatefulChatService : IDisposable
         var result = "";
         await foreach (var output in outputs)
         {
-            Console.Write(output);
+            _logger.LogInformation("Message: {output}", output);
             result += output;
         }
 
@@ -68,16 +67,14 @@ public class StatefulChatService : IDisposable
     {
         if (!_continue)
         {
-            Console.Write(SystemPrompt);
+            _logger.LogInformation(SystemPrompt);
             _continue = true;
         }
 
-        Console.ForegroundColor = ConsoleColor.Green;
-        Console.Write(input.Text);
+        _logger.LogInformation(input.Text);
 
-        Console.ForegroundColor = ConsoleColor.White;
         var outputs = _session.ChatAsync(
-            new Common.ChatHistory.Message(Common.AuthorRole.User, input.Text)
+            new Common.ChatHistory.Message(Common.AuthorRole.User, input.Text!)
             , new Common.InferenceParams()
             {
                 RepeatPenalty = 1.0f,
@@ -86,7 +83,7 @@ public class StatefulChatService : IDisposable
 
         await foreach (var output in outputs)
         {
-            Console.Write(output);
+            _logger.LogInformation(output);
             yield return output;
         }
     }

LLama.WebAPI/Services/StatelessChatService.cs

@@ -12,7 +12,7 @@ namespace LLama.WebAPI.Services
 
         public StatelessChatService(IConfiguration configuration)
         {
-            var @params = new Common.ModelParams(configuration["ModelPath"])
+            var @params = new Common.ModelParams(configuration["ModelPath"]!)
             {
                 ContextSize = 512,
             };

LLama.WebAPI/appsettings.Development.json

@@ -1,8 +1,8 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  }
-}
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}