0d0c48a468
Implement sending middleware. Sending middleware is useful for adding tracing, progress tokens, and so on. Change-Id: I0acab2550f0212d549c4adbcf1ebf425a9486df6 Reviewed-on: https://go-review.googlesource.com/c/tools/+/676355 Reviewed-by: Sam Thanawalla <samthanawalla@google.com> Reviewed-by: Robert Findley <rfindley@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
29 lines
841 B
Go
29 lines
841 B
Go
// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
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// Use of this source code is governed by an MIT-style
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// license that can be found in the LICENSE file.
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package mcp_test
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import (
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"context"
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"sync/atomic"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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var nextProgressToken atomic.Int64
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// This middleware function adds a progress token to every outgoing request
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// from the client.
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func Example_progressMiddleware() {
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c := mcp.NewClient("test", "v1", nil)
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c.AddSendingMiddleware(addProgressToken[*mcp.ClientSession])
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_ = c
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}
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func addProgressToken[S mcp.Session](h mcp.MethodHandler[S]) mcp.MethodHandler[S] {
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return func(ctx context.Context, s S, method string, params mcp.Params) (result mcp.Result, err error) {
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params.GetMeta().ProgressToken = nextProgressToken.Add(1)
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return h(ctx, s, method, params)
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}
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}
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