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Add logging support

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A server can send structured logging messages to the client.
https://modelcontextprotocol.io/specification/2025-06-18/server/utilities/logging#logging

Logging was specified in the 2024-11-05 specification, but since it was not supported in ruby-sdk, I implemented it.
https://modelcontextprotocol.io/specification/2024-11-05/server/utilities/logging

I also made it possible to output a simple notification message in the examples.
This commit is contained in:
dak2 2025-08-04 10:15:32 +09:00
commit afa2fb4077
1 changed files with 434 additions and 7 deletions
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1
examples/streamable_http_server.rb
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@ -107,6 +107,7 @@ app = proc do |env|
mcp_logger.error("Response error: #{parsed_response["error"]["message"]}")
elsif parsed_response["accepted"]
# Response was sent via SSE
server.notify_log_message(data: { details: "Response accepted and sent via SSE" }, level: "info")
sse_logger.info("Response sent via SSE stream")
else
mcp_logger.info("Response: success (id: #{parsed_response["id"]})")