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Improve tool handling (#28)

Browse source 
* Improve tool handling

* Rework stuff with new hosting options

* Update readme

* Fix build

* Try run client tests

* Fix build

* Fix issues on linux

* Try to run testserver on linux

* Fix test issue

* Fix code smells
This commit is contained in:
Toni Wenzel 2025-03-07 16:48:55 +01:00 • committed by GitHub
commit ec9bdfcf5d
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1 changed files with 1036 additions and 235 deletions
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52
tests/mcpdotnet.TestServer/Program.cs
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@ -5,7 +5,7 @@ using McpDotNet.Server;
using Microsoft.Extensions.Logging;
using Serilog;
internal class Program
internal static class Program
{
private static ILoggerFactory CreateLoggerFactory()
{
@ -17,7 +17,6 @@ internal class Program
outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level:u3}] {Message:lj}{NewLine}{Exception}")
.CreateLogger();
var logsPath = Path.Combine(AppContext.BaseDirectory, "testserver.log");
return LoggerFactory.Create(builder =>
{
builder.AddSerilog();
@ -26,7 +25,7 @@ internal class Program
private static async Task Main(string[] args)
{
Console.WriteLine("Starting server...");
Log.Logger.Information("Starting server...");
McpServerOptions options = new McpServerOptions()
{
@ -40,11 +39,12 @@ internal class Program
ProtocolVersion = "2024-11-05",
ServerInstructions = "This is a test server with only stub functionality",
};
var loggerFactory = CreateLoggerFactory();
McpServerFactory factory = new McpServerFactory(new StdioServerTransport("TestServer", loggerFactory), options, loggerFactory);
IMcpServer server = factory.CreateServer();
Console.WriteLine("Server object created, registering handlers.");
Log.Logger.Information("Server object created, registering handlers.");
#region Helped method
static CreateMessageRequestParams CreateRequestSamplingParams(string context, string uri, int maxTokens = 100)
@ -69,6 +69,7 @@ internal class Program
#endregion
#region Tools
server.ListToolsHandler = (request, cancellationToken) =>
{
return Task.FromResult(new ListToolsResult()
@ -108,22 +109,22 @@ internal class Program
server.CallToolHandler = async (request, cancellationToken) =>
{
if (request?.Name == "echo")
if (request.Params?.Name == "echo")
{
if (request.Arguments is null || !request.Arguments.TryGetValue("message", out var message))
if (request.Params?.Arguments is null || !request.Params.Arguments.TryGetValue("message", out var message))
{
throw new McpServerException("Missing required argument 'message'");
}
return new CallToolResponse()
{
Content = [new Content() { Text = "Echo: " + message.ToString(), Type = "text" }]
Content = [new Content() { Text = "Echo: " + message?.ToString(), Type = "text" }]
};
}
else if (request?.Name == "sampleLLM")
else if (request.Params?.Name == "sampleLLM")
{
if (request.Arguments is null ||
!request.Arguments.TryGetValue("prompt", out var prompt) ||
!request.Arguments.TryGetValue("maxTokens", out var maxTokens))
if (request.Params?.Arguments is null ||
!request.Params.Arguments.TryGetValue("prompt", out var prompt) ||
!request.Params.Arguments.TryGetValue("maxTokens", out var maxTokens))
{
throw new McpServerException("Missing required arguments 'prompt' and 'maxTokens'");
}
@ -137,7 +138,7 @@ internal class Program
}
else
{
throw new McpServerException($"Unknown tool: {request?.Name}");
throw new McpServerException($"Unknown tool: {request.Params?.Name}");
}
};
#endregion
@ -186,12 +187,12 @@ internal class Program
server.ListResourcesHandler = (request, cancellationToken) =>
{
int startIndex = 0;
if (request is null) request = new();
if (request.Cursor is not null)
request ??= new(server, new());
if (request.Params?.Cursor is not null)
{
try
{
var startIndexAsString = Encoding.UTF8.GetString(Convert.FromBase64String(request.Cursor));
var startIndexAsString = Encoding.UTF8.GetString(Convert.FromBase64String(request.Params.Cursor));
startIndex = Convert.ToInt32(startIndexAsString);
}
catch
@ -216,12 +217,11 @@ internal class Program
server.ReadResourceHandler = (request, cancellationToken) =>
{
if (request?.Uri is null)
if (request.Params?.Uri is null)
{
throw new McpServerException("Missing required argument 'uri'");
}
ResourceContents contents = resourceContents.FirstOrDefault(r => r.Uri == request.Uri)
ResourceContents contents = resourceContents.FirstOrDefault(r => r.Uri == request.Params.Uri)
?? throw new McpServerException("Resource not found");
return Task.FromResult(new ReadResourceResult()
@ -268,8 +268,8 @@ internal class Program
server.GetPromptHandler = (request, cancellationToken) =>
{
List<PromptMessage> messages = [];
if (request?.Name == "simple_prompt")
List<PromptMessage> messages = new();
if (request.Params?.Name == "simple_prompt")
{
messages.Add(new PromptMessage()
{
@ -281,10 +281,10 @@ internal class Program
}
});
}
else if (request?.Name == "complex_prompt")
else if (request.Params?.Name == "complex_prompt")
{
string temperature = request.Arguments?["temperature"]?.ToString() ?? "unknown";
string style = request.Arguments?["style"]?.ToString() ?? "unknown";
string temperature = request.Params.Arguments?["temperature"]?.ToString() ?? "unknown";
string style = request.Params.Arguments?["style"]?.ToString() ?? "unknown";
messages.Add(new PromptMessage()
{
Role = Role.User,
@ -316,7 +316,7 @@ internal class Program
}
else
{
throw new McpServerException($"Unknown prompt: {request?.Name}");
throw new McpServerException($"Unknown prompt: {request.Params?.Name}");
}
return Task.FromResult(new GetPromptResult()
@ -329,11 +329,11 @@ internal class Program
#region Sampling
#endregion
Console.WriteLine("Server initialized.");
Log.Logger.Information("Server initialized.");
await server.StartAsync();
Console.WriteLine("Server started.");
Log.Logger.Information("Server started.");
// Run until process is stopped by the client (parent process)
while (true)