go-sdk/internal/readme/client/client.go
Robert Findley dae88535ba
mcp: support stateless streamable sessions (#277)
Support stateless streamable sessions by adding a GetSessionID function
to StreamableHTTPOptions. If GetSessionID returns "", the session is
stateless, and no validation is performed. This is implemented by
providing the session a trivial initialization state.

To implement this, some parts of #232 (distributed sessions) are copied
over, since they add an API for creating an already-initialized session.

In total, the following new API is added:
- StreamableHTTPOptions.GetSessionID
- ServerSessionOptions (a new parameter to Server.Connect)
- ServerSessionState
- ClientSessionOptions (a new parameter to Client.Connect, for symmetry)

For #10
2025-08-11 16:43:46 -04:00

47 lines
1 KiB
Go

// Copyright 2025 The Go MCP SDK Authors. All rights reserved.
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// !+
package main
import (
"context"
"log"
"os/exec"
"github.com/modelcontextprotocol/go-sdk/mcp"
)
func main() {
ctx := context.Background()
// Create a new client, with no features.
client := mcp.NewClient(&mcp.Implementation{Name: "mcp-client", Version: "v1.0.0"}, nil)
// Connect to a server over stdin/stdout
transport := mcp.NewCommandTransport(exec.Command("myserver"))
session, err := client.Connect(ctx, transport, nil)
if err != nil {
log.Fatal(err)
}
defer session.Close()
// Call a tool on the server.
params := &mcp.CallToolParams{
Name: "greet",
Arguments: map[string]any{"name": "you"},
}
res, err := session.CallTool(ctx, params)
if err != nil {
log.Fatalf("CallTool failed: %v", err)
}
if res.IsError {
log.Fatal("tool failed")
}
for _, c := range res.Content {
log.Print(c.(*mcp.TextContent).Text)
}
}
//!-