95 lines
3 KiB
Python
95 lines
3 KiB
Python
import anyio
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import click
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import mcp.types as types
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from mcp.server.lowlevel import Server
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from mcp.server.lowlevel.helper_types import ReadResourceContents
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from starlette.requests import Request
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SAMPLE_RESOURCES = {
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"greeting": {
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"content": "Hello! This is a sample text resource.",
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"title": "Welcome Message",
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},
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"help": {
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"content": "This server provides a few sample text resources for testing.",
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"title": "Help Documentation",
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},
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"about": {
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"content": "This is the simple-resource MCP server implementation.",
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"title": "About This Server",
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},
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}
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@click.command()
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@click.option("--port", default=8000, help="Port to listen on for SSE")
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@click.option(
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"--transport",
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type=click.Choice(["stdio", "sse"]),
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default="stdio",
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help="Transport type",
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)
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def main(port: int, transport: str) -> int:
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app = Server("mcp-simple-resource")
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@app.list_resources()
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async def list_resources() -> list[types.Resource]:
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return [
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types.Resource(
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uri=f"file:///{name}.txt",
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name=name,
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title=SAMPLE_RESOURCES[name]["title"],
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description=f"A sample text resource named {name}",
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mime_type="text/plain",
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)
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for name in SAMPLE_RESOURCES.keys()
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]
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@app.read_resource()
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async def read_resource(uri: str):
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from urllib.parse import urlparse
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parsed = urlparse(uri)
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if not parsed.path:
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raise ValueError(f"Invalid resource path: {uri}")
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name = parsed.path.replace(".txt", "").lstrip("/")
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if name not in SAMPLE_RESOURCES:
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raise ValueError(f"Unknown resource: {uri}")
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return [ReadResourceContents(content=SAMPLE_RESOURCES[name]["content"], mime_type="text/plain")]
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if transport == "sse":
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from mcp.server.sse import SseServerTransport
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from starlette.applications import Starlette
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from starlette.responses import Response
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from starlette.routing import Mount, Route
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sse = SseServerTransport("/messages/")
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async def handle_sse(request: Request):
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async with sse.connect_sse(request.scope, request.receive, request._send) as streams: # type: ignore[reportPrivateUsage]
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await app.run(streams[0], streams[1], app.create_initialization_options())
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return Response()
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starlette_app = Starlette(
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debug=True,
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routes=[
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Route("/sse", endpoint=handle_sse, methods=["GET"]),
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Mount("/messages/", app=sse.handle_post_message),
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],
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)
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import uvicorn
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uvicorn.run(starlette_app, host="127.0.0.1", port=port)
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else:
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from mcp.server.stdio import stdio_server
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async def arun():
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async with stdio_server() as streams:
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await app.run(streams[0], streams[1], app.create_initialization_options())
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anyio.run(arun)
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return 0
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