3da831b0c9* mcp: move to 2025-06-18 schema Add types and fields for the latest MCP schema. The main challenge here was dealing with the presence of _meta fields on many types, like Tool, Prompt and Resource. - Distinguish between the _meta field of a request's params, which includes a progress token, from the _meta field on other types, which is simply a map. - Redefine GetMeta to return a pointer to the map. We wanted to avoid that, but I don't see a clean way to do so. An alternative would be to have GetMeta return a map, and SetMeta to set it. - Provide GetProgressToken for requests only (not notifications or other types). - Still to do: deal with the meta and annotation fields of ContentBlock, which are currently duplicated for Resource and ResourceContents. * Meta and progress token redesign
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
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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"fmt"
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"log"
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"net/http"
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"net/http/httptest"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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type AddParams struct {
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X, Y int
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}
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func Add(ctx context.Context, cc *mcp.ServerSession, params *mcp.CallToolParamsFor[AddParams]) (*mcp.CallToolResultFor[any], error) {
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return &mcp.CallToolResultFor[any]{
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Content: []*mcp.ContentBlock{mcp.NewTextContent(fmt.Sprintf("%d", params.Arguments.X+params.Arguments.Y))},
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}, nil
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}
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func ExampleSSEHandler() {
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server := mcp.NewServer("adder", "v0.0.1", nil)
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server.AddTools(mcp.NewServerTool("add", "add two numbers", Add))
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handler := mcp.NewSSEHandler(func(*http.Request) *mcp.Server { return server })
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httpServer := httptest.NewServer(handler)
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defer httpServer.Close()
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ctx := context.Background()
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transport := mcp.NewSSEClientTransport(httpServer.URL, nil)
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client := mcp.NewClient("test", "v1.0.0", nil)
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cs, err := client.Connect(ctx, transport)
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if err != nil {
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log.Fatal(err)
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}
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defer cs.Close()
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res, err := cs.CallTool(ctx, &mcp.CallToolParams{
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Name: "add",
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Arguments: map[string]any{"x": 1, "y": 2},
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})
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println(res.Content[0].Text)
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// Output: 3
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}
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