wehub-resource-sync
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51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
"""One lowlevel Server factory that serves both the 2025 handshake era and the 2026 stateless era."""
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from typing import Any
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import mcp_types as types
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from mcp_types.version import MODERN_PROTOCOL_VERSIONS
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from mcp.server.context import ServerRequestContext
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from mcp.server.lowlevel import Server
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from stories._hosting import run_server_from_args
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GREET_INPUT_SCHEMA: dict[str, Any] = {
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"type": "object",
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"properties": {"name": {"type": "string"}},
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"required": ["name"],
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}
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def build_server() -> Server[Any]:
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async def list_tools(
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ctx: ServerRequestContext[Any], params: types.PaginatedRequestParams | None
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) -> types.ListToolsResult:
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return types.ListToolsResult(
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tools=[
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types.Tool(
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name="greet",
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description="Greet the caller and report which protocol era served the request.",
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input_schema=GREET_INPUT_SCHEMA,
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),
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]
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)
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async def call_tool(ctx: ServerRequestContext[Any], params: types.CallToolRequestParams) -> types.CallToolResult:
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assert params.name == "greet" and params.arguments is not None
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era = "modern" if ctx.protocol_version in MODERN_PROTOCOL_VERSIONS else "legacy"
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text = f"Hello, {params.arguments['name']}! (served on the {era} era at {ctx.protocol_version})"
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return types.CallToolResult(content=[types.TextContent(text=text)])
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# The same factory serves both eras with no configuration. Which era a request is
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# on is decided by the entry point / transport, never by the server.
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return Server(
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"dual-era-example",
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instructions="A small dual-era demo server.",
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on_list_tools=list_tools,
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on_call_tool=call_tool,
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)
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if __name__ == "__main__":
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run_server_from_args(build_server)
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