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Pass session id's to MCP endpoints. (#466)

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* Pass session id's to MCP endpoints.

* Update src/ModelContextProtocol/Client/McpClient.cs

Co-authored-by: Stephen Halter <halter73@gmail.com>

* Update src/ModelContextProtocol.AspNetCore/StreamableHttpHandler.cs

Co-authored-by: Stephen Halter <halter73@gmail.com>

* Make init callback asynchronous.

* Address feedback.

---------

Co-authored-by: Stephen Halter <halter73@gmail.com>
This commit is contained in:
Eirik Tsarpalis 2025-06-12 16:56:57 +02:00 • committed by GitHub
commit d7d9eab3f8
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1 changed files with 166 additions and 21 deletions
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6
src/ModelContextProtocol.Core/Server/SseResponseStreamTransport.cs
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@ -23,7 +23,8 @@ namespace ModelContextProtocol.Server;
/// These messages should be passed to <see cref="OnMessageReceivedAsync(JsonRpcMessage, CancellationToken)"/>.
/// Defaults to "/message".
/// </param>
public sealed class SseResponseStreamTransport(Stream sseResponseStream, string? messageEndpoint = "/message") : ITransport
/// <param name="sessionId">The identifier corresponding to the current MCP session.</param>
public sealed class SseResponseStreamTransport(Stream sseResponseStream, string? messageEndpoint = "/message", string? sessionId = null) : ITransport
{
private readonly SseWriter _sseWriter = new(messageEndpoint);
private readonly Channel<JsonRpcMessage> _incomingChannel = Channel.CreateBounded<JsonRpcMessage>(new BoundedChannelOptions(1)
@ -49,6 +50,9 @@ public sealed class SseResponseStreamTransport(Stream sseResponseStream, string?
/// <inheritdoc/>
public ChannelReader<JsonRpcMessage> MessageReader => _incomingChannel.Reader;
/// <inheritdoc/>
public string? SessionId { get; } = sessionId;
/// <inheritdoc/>
public async ValueTask DisposeAsync()
{