6e03217c83Handlers and client/server methods take a single request argument combining the session and params. This slightly simplifies the signature for handlers, since there is no longer an often-ignored session argument. But more importantly, it opens the door to adding more information in requests, such as auth info and HTTP request headers. For #243.
74 lines
2 KiB
Go
74 lines
2 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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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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type SayHiParams struct {
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Name string `json:"name"`
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}
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func SayHi(ctx context.Context, req *mcp.ServerRequest[*mcp.CallToolParamsFor[SayHiParams]]) (*mcp.CallToolResultFor[any], error) {
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return &mcp.CallToolResultFor[any]{
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Content: []mcp.Content{
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&mcp.TextContent{Text: "Hi " + req.Params.Arguments.Name},
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},
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}, nil
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}
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func ExampleServer() {
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ctx := context.Background()
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clientTransport, serverTransport := mcp.NewInMemoryTransports()
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server := mcp.NewServer(&mcp.Implementation{Name: "greeter", Version: "v0.0.1"}, nil)
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mcp.AddTool(server, &mcp.Tool{Name: "greet", Description: "say hi"}, SayHi)
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serverSession, err := server.Connect(ctx, serverTransport, nil)
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if err != nil {
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log.Fatal(err)
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}
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client := mcp.NewClient(&mcp.Implementation{Name: "client"}, nil)
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clientSession, err := client.Connect(ctx, clientTransport, nil)
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if err != nil {
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log.Fatal(err)
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}
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res, err := clientSession.CallTool(ctx, &mcp.CallToolParams{
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Name: "greet",
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Arguments: map[string]any{"name": "user"},
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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].(*mcp.TextContent).Text)
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clientSession.Close()
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serverSession.Wait()
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// Output: Hi user
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}
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// createSessions creates and connects an in-memory client and server session for testing purposes.
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func createSessions(ctx context.Context) (*mcp.ClientSession, *mcp.ServerSession, *mcp.Server) {
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server := mcp.NewServer(testImpl, nil)
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client := mcp.NewClient(testImpl, nil)
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serverTransport, clientTransport := mcp.NewInMemoryTransports()
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serverSession, err := server.Connect(ctx, serverTransport, nil)
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if err != nil {
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log.Fatal(err)
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}
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clientSession, err := client.Connect(ctx, clientTransport, nil)
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if err != nil {
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log.Fatal(err)
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}
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return clientSession, serverSession, server
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}
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