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Add Trace-level logging for JSON-RPC payloads in transports (#1191)

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Copilot 2026-01-29 11:26:33 -08:00 • committed by GitHub
commit ee8c485d41
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1 changed files with 90 additions and 2 deletions
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16
src/ModelContextProtocol.Core/Protocol/TransportBase.cs
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@ -1,6 +1,7 @@
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using System.Diagnostics;
using System.Text.Json;
using System.Threading.Channels;
namespace ModelContextProtocol.Protocol;
@ -166,6 +167,21 @@ public abstract partial class TransportBase : ITransport
[LoggerMessage(Level = LogLevel.Error, Message = "{EndpointName} transport send failed for message ID '{MessageId}'.")]
private protected partial void LogTransportSendFailed(string endpointName, string messageId, Exception exception);
[LoggerMessage(Level = LogLevel.Trace, Message = "{EndpointName} transport sending message. Message: '{Message}'.")]
private protected partial void LogTransportSendingMessageSensitive(string endpointName, string message);
/// <summary>
/// Logs a sending message at Trace level if trace logging is enabled.
/// </summary>
/// <param name="message">The JSON-RPC message to log.</param>
private protected void LogTransportSendingMessageSensitive(JsonRpcMessage message)
{
if (_logger.IsEnabled(LogLevel.Trace))
{
LogTransportSendingMessageSensitive(Name, JsonSerializer.Serialize(message, McpJsonUtilities.JsonContext.Default.JsonRpcMessage));
}
}
[LoggerMessage(Level = LogLevel.Information, Message = "{EndpointName} transport reading messages.")]
private protected partial void LogTransportEnteringReadMessagesLoop(string endpointName);