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Local MCP Client for Overgrowth - connects to local MCP server
"""
import subprocess
import json
import sys
import logging
import uuid
from typing import Dict, List, Any, Optional
from pathlib import Path
# Configure logging
logger = logging.getLogger(__name__)
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
# Import API monitor for tracking
try:
from agent.api_monitor import monitor
except ImportError:
logger.warning("API monitor not available - tracking disabled")
monitor = None
# Path to local MCP server
# In production (HuggingFace Space), use relative path
# In dev, use absolute path
import os
if os.path.exists("/home/gpaasch/overgrowth-mcp-server/server.py"):
MCP_SERVER_PATH = Path("/home/gpaasch/overgrowth-mcp-server/server.py")
VENV_PYTHON = Path("/home/gpaasch/overgrowth-mcp-server/venv/bin/python")
elif os.path.exists("mcp-server/server.py"):
# Running from overgrowth directory
MCP_SERVER_PATH = Path("mcp-server/server.py")
# Try to use the overgrowth-mcp-server venv if it exists
if os.path.exists("/home/gpaasch/overgrowth-mcp-server/venv/bin/python"):
VENV_PYTHON = Path("/home/gpaasch/overgrowth-mcp-server/venv/bin/python")
else:
VENV_PYTHON = Path("/usr/local/bin/python3") # Fallback
else:
# HuggingFace Space - use bundled MCP server
MCP_SERVER_PATH = Path(__file__).parent.parent / "mcp-server" / "server.py"
VENV_PYTHON = Path("/usr/local/bin/python3") # Use system python in Space
class LocalMCPClient:
"""Client for local Overgrowth MCP server via stdio"""
def __init__(self):
self.server_path = MCP_SERVER_PATH
self.python_path = VENV_PYTHON if VENV_PYTHON.exists() else sys.executable
self._request_id = 0
def _get_request_id(self) -> int:
"""Get next request ID"""
self._request_id += 1
return self._request_id
def call_tool(self, tool_name: str, arguments: Dict[str, Any]) -> Dict[str, Any]:
"""
Call a tool on the MCP server
Args:
tool_name: Name of the tool to call
arguments: Tool arguments
Returns:
Tool response data
"""
call_id = str(uuid.uuid4())
if monitor:
monitor.start_call(call_id, "gns3", "local-mcp", tool_name, arguments=arguments)
try:
# Initialize request
init_request = {
"jsonrpc": "2.0",
"id": self._get_request_id(),
"method": "initialize",
"params": {
"protocolVersion": "2024-11-05",
"capabilities": {},
"clientInfo": {
"name": "overgrowth-gradio-client",
"version": "0.1.0"
}
}
}
# Tool call request
tool_request = {
"jsonrpc": "2.0",
"id": self._get_request_id(),
"method": "tools/call",
"params": {
"name": tool_name,
"arguments": arguments
}
}
# Prepare input (init + tool call)
input_data = json.dumps(init_request) + "\n" + json.dumps(tool_request) + "\n"
logger.info(f"Calling MCP tool: {tool_name} with server at {self.server_path}")
logger.debug(f"Using python: {self.python_path}")
# Run server process
result = subprocess.run(
[str(self.python_path), str(self.server_path)],
input=input_data,
capture_output=True,
text=True,
timeout=60 # Increased timeout for network operations
)
logger.debug(f"MCP server exit code: {result.returncode}")
if result.stderr:
logger.debug(f"MCP server stderr: {result.stderr[:500]}")
# Parse responses
lines = result.stdout.strip().split('\n')
# Look for JSON-RPC responses
for line in lines:
if not line.strip() or line.startswith('INFO:') or line.startswith('WARNING:'):
continue
try:
response = json.loads(line)
# Check if it's a tool response
if response.get('id') == tool_request['id']:
if 'error' in response:
error_msg = response['error']
logger.error(f"MCP tool {tool_name} failed: {error_msg}")
if monitor:
monitor.complete_call(call_id, success=False, error_message=str(error_msg))
raise Exception(f"MCP Error: {error_msg}")
# Extract text content from result
result_data = response.get('result', {})
content = result_data.get('content', [])
if content and len(content) > 0:
logger.info(f"MCP tool {tool_name} completed successfully")
if monitor:
monitor.complete_call(call_id, success=True)
return {
'success': True,
'text': content[0].get('text', ''),
'raw': result_data
}
logger.info(f"MCP tool {tool_name} completed (no text content)")
if monitor:
monitor.complete_call(call_id, success=True)
return {
'success': True,
'raw': result_data
}
except json.JSONDecodeError as e:
logger.debug(f"Skipping non-JSON line: {line[:100]}")
continue
# If we get here, no valid response found
logger.error(f"No valid response from MCP server for tool {tool_name}")
logger.error(f"stdout: {result.stdout[:1000]}")
if monitor:
monitor.complete_call(call_id, success=False, error_message="No valid response from MCP server")
raise Exception(f"No valid response from MCP server. stdout: {result.stdout[:500]}, stderr: {result.stderr[:500]}")
except subprocess.TimeoutExpired:
logger.error(f"MCP server call to {tool_name} timed out after 60 seconds")
if monitor:
monitor.complete_call(call_id, success=False, error_message="Timeout after 60s")
raise Exception(f"MCP server call to {tool_name} timed out - this may indicate GNS3 server is unreachable or slow")
except Exception as e:
logger.error(f"Failed to call MCP tool {tool_name}: {str(e)}")
if monitor:
monitor.complete_call(call_id, success=False, error_message=str(e))
raise Exception(f"Failed to call MCP tool {tool_name}: {str(e)}")
def get_topology(self, project_name: str = "overgrowth") -> Dict[str, Any]:
"""Get GNS3 topology information"""
result = self.call_tool("get_topology", {"project_name": project_name})
if result.get('success'):
# Parse JSON from text response
text = result.get('text', '{}')
return json.loads(text)
raise Exception("Failed to get topology")
def get_projects(self) -> List[Dict[str, Any]]:
"""Get list of GNS3 projects"""
result = self.call_tool("get_projects", {})
if result.get('success'):
text = result.get('text', '[]')
return json.loads(text)
return []
def start_device(self, project_name: str, device_name: str) -> bool:
"""Start a network device"""
result = self.call_tool("start_device", {
"project_name": project_name,
"device_name": device_name
})
return result.get('success', False)
def stop_device(self, project_name: str, device_name: str) -> bool:
"""Stop a network device"""
result = self.call_tool("stop_device", {
"project_name": project_name,
"device_name": device_name
})
return result.get('success', False)
def get_device_config(self, host: str, username: str = "admin", port: int = 22) -> str:
"""Get device running configuration via SSH"""
result = self.call_tool("get_device_config", {
"host": host,
"username": username,
"port": port
})
if result.get('success'):
return result.get('text', '')
raise Exception(f"Failed to get config from {host}")
def configure_device(self, host: str, commands: List[str],
username: str = "admin", port: int = 22) -> str:
"""Send configuration commands to device"""
result = self.call_tool("configure_device", {
"host": host,
"commands": commands,
"username": username,
"port": port
})
if result.get('success'):
return result.get('text', '')
raise Exception(f"Failed to configure {host}")
def backup_config(self, host: str, device_name: str, username: str = "admin") -> str:
"""Backup device configuration"""
# Prefer the updated tool name, fall back to the older alias for compatibility.
try:
result = self.call_tool("backup_device_config", {
"host": host,
"device_name": device_name,
"username": username
})
except Exception:
result = self.call_tool("backup_config", {
"host": host,
"device_name": device_name,
"username": username
})
if result.get('success'):
return result.get('text', '')
raise Exception(f"Failed to backup {device_name}")
# Singleton instance
_client = None
def get_mcp_client() -> LocalMCPClient:
"""Get or create MCP client singleton"""
global _client
if _client is None:
_client = LocalMCPClient()
return _client
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