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Automatically fall back from Streamable HTTP to SSE on the client by default (#456)

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Stephen Halter 2025-05-28 11:06:58 -07:00 • committed by GitHub
commit 317f468807
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1 changed files with 489 additions and 49 deletions
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10
src/ModelContextProtocol/Client/StreamClientSessionTransport.cs
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@ -17,7 +17,7 @@ internal class StreamClientSessionTransport : TransportBase
/// Initializes a new instance of the <see cref="StreamClientSessionTransport"/> class.
/// </summary>
/// <param name="serverInput">
/// The text writer connected to the server's input stream.
/// The text writer connected to the server's input stream.
/// Messages written to this writer will be sent to the server.
/// </param>
/// <param name="serverOutput">
@ -41,17 +41,17 @@ internal class StreamClientSessionTransport : TransportBase
_serverOutput = serverOutput;
_serverInput = serverInput;
SetConnected();
// Start reading messages in the background. We use the rarer pattern of new Task + Start
// in order to ensure that the body of the task will always see _readTask initialized.
// It is then able to reliably null it out on completion.
var readTask = new Task<Task>(
thisRef => ((StreamClientSessionTransport)thisRef!).ReadMessagesAsync(_shutdownCts.Token),
thisRef => ((StreamClientSessionTransport)thisRef!).ReadMessagesAsync(_shutdownCts.Token),
this,
TaskCreationOptions.DenyChildAttach);
_readTask = readTask.Unwrap();
readTask.Start();
SetConnected();
}
/// <inheritdoc/>
@ -80,7 +80,7 @@ internal class StreamClientSessionTransport : TransportBase
}
/// <inheritdoc/>
public override ValueTask DisposeAsync() =>
public override ValueTask DisposeAsync() =>
CleanupAsync(cancellationToken: CancellationToken.None);
private async Task ReadMessagesAsync(CancellationToken cancellationToken)