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Add server-side Streamable HTTP transport support (#330)

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- Changes IJsonRpcMessage to an abstract base class so RelatedTransport will always be available
- Streamable HTTP supports multiple concurrent HTTP request with their own indpendent SSE response streams
- RelatedTransport indicates the source or destination of the JsonRpcMessage

- Changes the default RequestId to a JSON number for better compatibility with MCP servers in the wild
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Stephen Halter 2025-04-18 17:07:23 -07:00 • committed by GitHub
commit 7dcba357d4
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1 changed files with 1637 additions and 395 deletions
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8
tests/ModelContextProtocol.Tests/Client/McpClientFactoryTests.cs
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@ -106,11 +106,11 @@ public class McpClientFactoryTests
private class NopTransport : ITransport, IClientTransport
{
private readonly Channel<IJsonRpcMessage> _channel = Channel.CreateUnbounded<IJsonRpcMessage>();
private readonly Channel<JsonRpcMessage> _channel = Channel.CreateUnbounded<JsonRpcMessage>();
public bool IsConnected => true;
public ChannelReader<IJsonRpcMessage> MessageReader => _channel.Reader;
public ChannelReader<JsonRpcMessage> MessageReader => _channel.Reader;
public Task<ITransport> ConnectAsync(CancellationToken cancellationToken = default) => Task.FromResult<ITransport>(this);
@ -118,7 +118,7 @@ public class McpClientFactoryTests
public string Name => "Test Nop Transport";
public virtual Task SendMessageAsync(IJsonRpcMessage message, CancellationToken cancellationToken = default)
public virtual Task SendMessageAsync(JsonRpcMessage message, CancellationToken cancellationToken = default)
{
switch (message)
{
@ -148,7 +148,7 @@ public class McpClientFactoryTests
{
public const string ExpectedMessage = "Something failed";
public override Task SendMessageAsync(IJsonRpcMessage message, CancellationToken cancellationToken = default)
public override Task SendMessageAsync(JsonRpcMessage message, CancellationToken cancellationToken = default)
{
throw new InvalidOperationException(ExpectedMessage);
}