60 lines
2.2 KiB
C#
60 lines
2.2 KiB
C#
using Microsoft.AspNetCore.Connections;
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using System.Collections.Concurrent;
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using System.Net;
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using System.Threading.Channels;
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namespace ModelContextProtocol.AspNetCore.Tests.Utils;
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public sealed class KestrelInMemoryTransport : IConnectionListenerFactory
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{
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// socket accept queues keyed by listen port.
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private readonly ConcurrentDictionary<int, Channel<ConnectionContext>> _acceptQueues = [];
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public KestrelInMemoryConnection CreateConnection(EndPoint endpoint)
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{
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var connection = new KestrelInMemoryConnection();
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if (!GetAcceptQueue(endpoint).Writer.TryWrite(connection))
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{
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throw new IOException("The KestrelInMemoryTransport has been shut down.");
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};
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return connection;
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}
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public ValueTask<IConnectionListener> BindAsync(EndPoint endpoint, CancellationToken cancellationToken = default) =>
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new(new KestrelInMemoryListener(endpoint, GetAcceptQueue(endpoint)));
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private Channel<ConnectionContext> GetAcceptQueue(EndPoint endpoint) =>
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_acceptQueues.GetOrAdd(GetEndpointPort(endpoint), _ => Channel.CreateUnbounded<ConnectionContext>());
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private static int GetEndpointPort(EndPoint endpoint) =>
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endpoint switch
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{
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DnsEndPoint dnsEndpoint => dnsEndpoint.Port,
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IPEndPoint ipEndpoint => ipEndpoint.Port,
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_ => throw new InvalidOperationException($"Unexpected endpoint type: '{endpoint.GetType()}'"),
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};
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private sealed class KestrelInMemoryListener(EndPoint endpoint, Channel<ConnectionContext> acceptQueue) : IConnectionListener
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{
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public EndPoint EndPoint => endpoint;
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public async ValueTask<ConnectionContext?> AcceptAsync(CancellationToken cancellationToken = default)
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{
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await foreach (var item in acceptQueue.Reader.ReadAllAsync(cancellationToken))
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{
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return item;
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}
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return null;
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}
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public ValueTask UnbindAsync(CancellationToken cancellationToken = default)
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{
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acceptQueue.Writer.TryComplete();
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return default;
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}
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public ValueTask DisposeAsync() => UnbindAsync(CancellationToken.None);
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}
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}
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