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modelcontextprotocol--pytho…/examples/servers/simple-resource/mcp_simple_resource/server.py
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

92 lines
2.6 KiB
Python

from urllib.parse import urlparse
import anyio
import click
import mcp_types as types
from mcp.server import Server, ServerRequestContext
SAMPLE_RESOURCES = {
"greeting": {
"content": "Hello! This is a sample text resource.",
"title": "Welcome Message",
},
"help": {
"content": "This server provides a few sample text resources for testing.",
"title": "Help Documentation",
},
"about": {
"content": "This is the simple-resource MCP server implementation.",
"title": "About This Server",
},
}
async def handle_list_resources(
ctx: ServerRequestContext, params: types.PaginatedRequestParams | None
) -> types.ListResourcesResult:
return types.ListResourcesResult(
resources=[
types.Resource(
uri=f"file:///{name}.txt",
name=name,
title=SAMPLE_RESOURCES[name]["title"],
description=f"A sample text resource named {name}",
mime_type="text/plain",
)
for name in SAMPLE_RESOURCES.keys()
]
)
async def handle_read_resource(
ctx: ServerRequestContext, params: types.ReadResourceRequestParams
) -> types.ReadResourceResult:
parsed = urlparse(str(params.uri))
if not parsed.path:
raise ValueError(f"Invalid resource path: {params.uri}")
name = parsed.path.replace(".txt", "").lstrip("/")
if name not in SAMPLE_RESOURCES:
raise ValueError(f"Unknown resource: {params.uri}")
return types.ReadResourceResult(
contents=[
types.TextResourceContents(
uri=str(params.uri),
text=SAMPLE_RESOURCES[name]["content"],
mime_type="text/plain",
)
]
)
@click.command()
@click.option("--port", default=8000, help="Port to listen on for HTTP")
@click.option(
"--transport",
type=click.Choice(["stdio", "streamable-http"]),
default="stdio",
help="Transport type",
)
def main(port: int, transport: str) -> int:
app = Server(
"mcp-simple-resource",
on_list_resources=handle_list_resources,
on_read_resource=handle_read_resource,
)
if transport == "streamable-http":
import uvicorn
uvicorn.run(app.streamable_http_app(), host="127.0.0.1", port=port)
else:
from mcp.server.stdio import stdio_server
async def arun():
async with stdio_server() as streams:
await app.run(streams[0], streams[1], app.create_initialization_options())
anyio.run(arun)
return 0