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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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3 changed files with 166 additions and 21 deletions
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1
tests/ModelContextProtocol.Tests/Client/McpClientFactoryTests.cs
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@ -109,6 +109,7 @@ public class McpClientFactoryTests
private readonly Channel<JsonRpcMessage> _channel = Channel.CreateUnbounded<JsonRpcMessage>();
public bool IsConnected => true;
public string? SessionId => null;
public ChannelReader<JsonRpcMessage> MessageReader => _channel.Reader;

18
tests/ModelContextProtocol.Tests/ClientIntegrationTests.cs
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@ -54,6 +54,8 @@ public partial class ClientIntegrationTests : LoggedTest, IClassFixture<ClientIn
Assert.NotNull(client.ServerInfo);
if (clientId != "everything") // Note: Comment the below assertion back when the everything server is updated to provide instructions
Assert.NotNull(client.ServerInstructions);
Assert.Null(client.SessionId);
}
[Theory]
@ -94,6 +96,22 @@ public partial class ClientIntegrationTests : LoggedTest, IClassFixture<ClientIn
Assert.Equal("Echo: Hello MCP!", textContent.Text);
}
[Fact]
public async Task CallTool_Stdio_EchoSessionId_ReturnsNull()
{
// arrange
// act
await using var client = await _fixture.CreateClientAsync("test_server");
var result = await client.CallToolAsync("echoSessionId", cancellationToken: TestContext.Current.CancellationToken);
// assert
Assert.NotNull(result);
Assert.False(result.IsError);
var textContent = Assert.Single(result.Content, c => c.Type == "text");
Assert.Null(textContent.Text);
}
[Theory]
[MemberData(nameof(GetClients))]
public async Task CallTool_Stdio_ViaAIFunction_EchoServer(string clientId)

1
tests/ModelContextProtocol.Tests/Server/McpServerTests.cs
View file

@ -650,6 +650,7 @@ public class McpServerTests : LoggedTest
public ValueTask DisposeAsync() => default;
public string? SessionId => throw new NotImplementedException();
public Implementation? ClientInfo => throw new NotImplementedException();
public IServiceProvider? Services => throw new NotImplementedException();
public LoggingLevel? LoggingLevel => throw new NotImplementedException();