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Add ModelContextProtocol.Core package (#428)

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Stephen Halter 2025-06-02 15:16:45 -07:00 • committed by GitHub
commit 703b0fe50b
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87
src/ModelContextProtocol/Server/StdioServerTransport.cs
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@ -1,87 +0,0 @@
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using ModelContextProtocol.Protocol;
namespace ModelContextProtocol.Server;
/// <summary>
/// Provides an <see cref="ITransport"/> implemented via "stdio" (standard input/output).
/// </summary>
public sealed class StdioServerTransport : StreamServerTransport
{
/// <summary>
/// Initializes a new instance of the <see cref="StdioServerTransport"/> class.
/// </summary>
/// <param name="serverOptions">The server options.</param>
/// <param name="loggerFactory">Optional logger factory used for logging employed by the transport.</param>
/// <exception cref="ArgumentNullException"><paramref name="serverOptions"/> is <see langword="null"/>.</exception>
public StdioServerTransport(IOptions<McpServerOptions> serverOptions, ILoggerFactory? loggerFactory = null)
: this(serverOptions?.Value!, loggerFactory: loggerFactory)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="StdioServerTransport"/> class.
/// </summary>
/// <param name="serverOptions">The server options.</param>
/// <param name="loggerFactory">Optional logger factory used for logging employed by the transport.</param>
/// <exception cref="ArgumentNullException"><paramref name="serverOptions"/> is <see langword="null"/> or contains a null name.</exception>
public StdioServerTransport(McpServerOptions serverOptions, ILoggerFactory? loggerFactory = null)
: this(GetServerName(serverOptions), loggerFactory: loggerFactory)
{
}
/// <summary>
/// Initializes a new instance of the <see cref="StdioServerTransport"/> class.
/// </summary>
/// <param name="serverName">The name of the server.</param>
/// <param name="loggerFactory">Optional logger factory used for logging employed by the transport.</param>
/// <exception cref="ArgumentNullException"><paramref name="serverName"/> is <see langword="null"/>.</exception>
public StdioServerTransport(string serverName, ILoggerFactory? loggerFactory = null)
: base(new CancellableStdinStream(Console.OpenStandardInput()),
new BufferedStream(Console.OpenStandardOutput()),
serverName ?? throw new ArgumentNullException(nameof(serverName)),
loggerFactory)
{
}
private static string GetServerName(McpServerOptions serverOptions)
{
Throw.IfNull(serverOptions);
return serverOptions.ServerInfo?.Name ?? McpServer.DefaultImplementation.Name;
}
// Neither WindowsConsoleStream nor UnixConsoleStream respect CancellationTokens or cancel any I/O on Dispose.
// WindowsConsoleStream will return an EOS on Ctrl-C, but that is not the only reason the shutdownToken may fire.
private sealed class CancellableStdinStream(Stream stdinStream) : Stream
{
public override bool CanRead => true;
public override bool CanSeek => false;
public override bool CanWrite => false;
public override Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
=> stdinStream.ReadAsync(buffer, offset, count, cancellationToken).WaitAsync(cancellationToken);
#if NET
public override ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken cancellationToken = default)
{
ValueTask<int> vt = stdinStream.ReadAsync(buffer, cancellationToken);
return vt.IsCompletedSuccessfully ? vt : new(vt.AsTask().WaitAsync(cancellationToken));
}
#endif
// The McpServer shouldn't call flush on the stdin Stream, but it doesn't need to throw just in case.
public override void Flush() { }
public override long Length => throw new NotSupportedException();
public override long Position { get => throw new NotSupportedException(); set => throw new NotSupportedException(); }
public override int Read(byte[] buffer, int offset, int count) => throw new NotSupportedException();
public override long Seek(long offset, SeekOrigin origin) => throw new NotSupportedException();
public override void SetLength(long value) => throw new NotSupportedException();
public override void Write(byte[] buffer, int offset, int count) => throw new NotSupportedException();
}
}