90 lines
No EOL
3.4 KiB
C#
90 lines
No EOL
3.4 KiB
C#
using AspNetCoreMcpPerSessionTools.Tools;
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using ModelContextProtocol.Server;
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using System.Collections.Concurrent;
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using System.Reflection;
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var builder = WebApplication.CreateBuilder(args);
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// Create and populate the tool dictionary at startup
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var toolDictionary = new ConcurrentDictionary<string, McpServerTool[]>();
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PopulateToolDictionary(toolDictionary);
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// Register all MCP server tools - they will be filtered per session based on route
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builder.Services.AddMcpServer()
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.WithHttpTransport(options =>
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{
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// This sample demonstrates per-session tool filtering, which requires stateful mode.
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// Set Stateless = false explicitly for forward compatibility in case the default changes.
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options.Stateless = false;
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// Configure per-session options to filter tools based on route category
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options.ConfigureSessionOptions = async (httpContext, mcpOptions, cancellationToken) =>
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{
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// Determine tool category from route parameters
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var toolCategory = httpContext.Request.RouteValues["toolCategory"]?.ToString()?.ToLower() ?? "all";
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// Get pre-populated tools for the requested category
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if (toolDictionary.TryGetValue(toolCategory, out var tools))
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{
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mcpOptions.Capabilities = new();
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mcpOptions.Capabilities.Tools = new();
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var toolCollection = mcpOptions.ToolCollection = [];
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foreach (var tool in tools)
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{
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toolCollection.Add(tool);
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}
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}
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};
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});
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var app = builder.Build();
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// Map MCP with route parameter for tool category filtering
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app.MapMcp("/{toolCategory?}");
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app.Run();
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// Helper method to populate the tool dictionary at startup
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static void PopulateToolDictionary(ConcurrentDictionary<string, McpServerTool[]> toolDictionary)
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{
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// Get tools for each category
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var clockTools = GetToolsForType<ClockTool>();
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var calculatorTools = GetToolsForType<CalculatorTool>();
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var userInfoTools = GetToolsForType<UserInfoTool>();
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McpServerTool[] allTools = [.. clockTools,
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.. calculatorTools,
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.. userInfoTools];
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// Populate the dictionary with tools for each category
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toolDictionary.TryAdd("clock", clockTools);
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toolDictionary.TryAdd("calculator", calculatorTools);
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toolDictionary.TryAdd("userinfo", userInfoTools);
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toolDictionary.TryAdd("all", allTools);
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}
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// Helper method to get tools for a specific type using reflection
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static McpServerTool[] GetToolsForType<[System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembers(
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System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.PublicMethods)] T>()
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{
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var tools = new List<McpServerTool>();
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var toolType = typeof(T);
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var methods = toolType.GetMethods(BindingFlags.Public | BindingFlags.Static)
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.Where(m => m.GetCustomAttributes(typeof(McpServerToolAttribute), false).Any());
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foreach (var method in methods)
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{
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try
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{
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var tool = McpServerTool.Create(method, target: null, new McpServerToolCreateOptions());
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tools.Add(tool);
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}
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catch (Exception ex)
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{
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// Log error but continue with other tools
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Console.WriteLine($"Failed to add tool {toolType.Name}.{method.Name}: {ex.Message}");
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}
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}
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return [.. tools];
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} |