wehub-resource-sync
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101 lines
2.9 KiB
Python
101 lines
2.9 KiB
Python
# Copyright 2026 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import asyncio
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import json
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import os
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from pathlib import Path
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import sys
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from mcp.server.fastmcp import FastMCP
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# Create an MCP server with a name
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mcp = FastMCP("Filesystem Server", host="localhost", port=3000)
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# Add a tool to read file contents
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@mcp.tool(description="Read contents of a file")
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def read_file(filepath: str) -> str:
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"""Read and return the contents of a file."""
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with open(filepath, "r") as f:
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return f.read()
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# Add a tool to list directory contents
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@mcp.tool(description="List contents of a directory")
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def list_directory(dirpath: str) -> list:
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"""List all files and directories in the given directory."""
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return os.listdir(dirpath)
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# Add a tool to get current working directory
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@mcp.tool(description="Get current working directory")
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def get_cwd() -> str:
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"""Return the current working directory."""
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return str(Path.cwd())
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# Add a resource for testing with JSON data
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@mcp.resource(
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name="sample_data",
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uri="file:///sample_data.json",
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mime_type="application/json",
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)
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def sample_data() -> str:
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data = {
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"users": [
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{"id": 1, "name": "Alice", "role": "admin"},
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{"id": 2, "name": "Bob", "role": "user"},
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{"id": 3, "name": "Charlie", "role": "user"},
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],
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"settings": {"theme": "dark", "notifications": True},
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}
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return json.dumps(data, indent=2)
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# Graceful shutdown handler
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async def shutdown(signal, loop):
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"""Cleanup tasks tied to the service's shutdown."""
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print(f"\nReceived exit signal {signal.name}...")
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# Get all running tasks
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tasks = [t for t in asyncio.all_tasks() if t is not asyncio.current_task()]
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# Cancel all tasks
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for task in tasks:
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task.cancel()
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print(f"Cancelling {len(tasks)} outstanding tasks")
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await asyncio.gather(*tasks, return_exceptions=True)
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# Stop the loop
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loop.stop()
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print("Shutdown complete!")
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# Main entry point with graceful shutdown handling
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if __name__ == "__main__":
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try:
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# The MCP run function ultimately uses asyncio.run() internally
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mcp.run(transport="streamable-http")
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except KeyboardInterrupt:
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print("\nServer shutting down gracefully...")
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# The asyncio event loop has already been stopped by the KeyboardInterrupt
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print("Server has been shut down.")
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except Exception as e:
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print(f"Unexpected error: {e}")
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sys.exit(1)
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finally:
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print("Thank you for using the Filesystem MCP Server!")
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