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Add support for message-level filters to McpServer (#1207)

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Stephen Halter 2026-01-30 15:19:00 -08:00 • committed by GitHub
commit 7d48d3922c
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1 changed files with 1333 additions and 105 deletions
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52
src/ModelContextProtocol.Core/Server/RequestContext.cs
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@ -1,4 +1,3 @@
using System.Security.Claims;
using ModelContextProtocol.Protocol;
namespace ModelContextProtocol.Server;
@ -12,11 +11,8 @@ namespace ModelContextProtocol.Server;
/// This type is typically received as a parameter in handler delegates registered with IMcpServerBuilder,
/// and can be injected as parameters into <see cref="McpServerTool"/>s.
/// </remarks>
public sealed class RequestContext<TParams>
public sealed class RequestContext<TParams> : MessageContext
{
/// <summary>The server with which this instance is associated.</summary>
private McpServer _server;
/// <summary>
/// Initializes a new instance of the <see cref="RequestContext{TParams}"/> class with the specified server and JSON-RPC request.
/// </summary>
@ -24,48 +20,10 @@ public sealed class RequestContext<TParams>
/// <param name="jsonRpcRequest">The JSON-RPC request associated with this context.</param>
/// <exception cref="ArgumentNullException"><paramref name="server"/> or <paramref name="jsonRpcRequest"/> is <see langword="null"/>.</exception>
public RequestContext(McpServer server, JsonRpcRequest jsonRpcRequest)
: base(server, jsonRpcRequest)
{
Throw.IfNull(server);
Throw.IfNull(jsonRpcRequest);
_server = server;
JsonRpcRequest = jsonRpcRequest;
Services = server.Services;
User = jsonRpcRequest.Context?.User;
}
/// <summary>Gets or sets the server with which this instance is associated.</summary>
public McpServer Server
{
get => _server;
set
{
Throw.IfNull(value);
_server = value;
}
}
/// <summary>
/// Gets or sets a key/value collection that can be used to share data within the scope of this request.
/// </summary>
public IDictionary<string, object?> Items
{
get => field ??= new Dictionary<string, object?>();
set => field = value;
}
/// <summary>Gets or sets the services associated with this request.</summary>
/// <remarks>
/// This provider might not be the same instance stored in <see cref="McpServer.Services"/>
/// if <see cref="McpServerOptions.ScopeRequests"/> was true, in which case this
/// might be a scoped <see cref="IServiceProvider"/> derived from the server's
/// <see cref="McpServer.Services"/>.
/// </remarks>
public IServiceProvider? Services { get; set; }
/// <summary>Gets or sets the user associated with this request.</summary>
public ClaimsPrincipal? User { get; set; }
/// <summary>Gets or sets the parameters associated with this request.</summary>
public TParams? Params { get; set; }
@ -81,7 +39,11 @@ public sealed class RequestContext<TParams>
/// This property provides access to the complete JSON-RPC request that initiated this handler invocation,
/// including the method name, parameters, request ID, and associated transport and user information.
/// </remarks>
public JsonRpcRequest JsonRpcRequest { get; }
public JsonRpcRequest JsonRpcRequest
{
get => (JsonRpcRequest)JsonRpcMessage;
set => JsonRpcMessage = value;
}
/// <summary>
/// Ends the current response and enables polling for updates from the server.