79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
// Copyright (c) 2025-2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package mcputils
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import (
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"context"
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"fmt"
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"time"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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"go.gearno.de/kit/log"
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)
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func LoggingMiddleware(logger *log.Logger) func(mcp.MethodHandler) mcp.MethodHandler {
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return func(next mcp.MethodHandler) mcp.MethodHandler {
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return func(ctx context.Context, method string, req mcp.Request) (mcp.Result, error) {
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logger.InfoCtx(
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ctx,
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fmt.Sprintf("mcp %q method started", method),
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log.String("method", method),
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log.Bool("has_params", req.GetParams() != nil),
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)
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if ctr, ok := req.(*mcp.CallToolRequest); ok {
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logger.InfoCtx(
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ctx,
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fmt.Sprintf("calling %q tool", ctr.Params.Name),
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log.String("tool_name", ctr.Params.Name),
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)
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}
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start := time.Now()
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result, err := next(ctx, method, req)
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duration := time.Since(start)
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if err != nil {
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logger.ErrorCtx(
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ctx,
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fmt.Sprintf("mcp %q method failed", method),
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log.String("method", method),
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log.Int64("duration_ms", duration.Milliseconds()),
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log.Error(err),
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)
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} else {
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logger.InfoCtx(
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ctx,
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fmt.Sprintf("mcp %q method completed", method),
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log.String("method", method),
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log.Int64("duration_ms", duration.Milliseconds()),
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log.Bool("has_result", result != nil),
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)
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if ctr, ok := result.(*mcp.CallToolResult); ok {
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logger.InfoCtx(
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ctx,
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"tool call result",
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log.Bool("is_error", ctr.IsError),
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)
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}
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}
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return result, err
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}
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}
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}
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