mirror of
https://github.com/1Panel-dev/MaxKB.git
synced 2025-12-26 18:32:48 +00:00
274 lines
11 KiB
Python
274 lines
11 KiB
Python
# coding=utf-8
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import ast
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import base64
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import gzip
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import io
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import json
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import os
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import socket
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import subprocess
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import sys
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import signal
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import time
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import uuid_utils.compat as uuid
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from common.utils.logger import maxkb_logger
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from django.utils.translation import gettext_lazy as _
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from maxkb.const import BASE_DIR, CONFIG
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from maxkb.const import PROJECT_DIR
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from textwrap import dedent
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python_directory = sys.executable
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class ToolExecutor:
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def __init__(self, sandbox=False):
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self.sandbox = sandbox
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if sandbox:
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self.sandbox_path = CONFIG.get("SANDBOX_HOME", '/opt/maxkb-app/sandbox')
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self.user = 'sandbox'
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else:
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self.sandbox_path = os.path.join(PROJECT_DIR, 'data', 'sandbox')
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self.user = None
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self.sandbox_so_path = f'{self.sandbox_path}/lib/sandbox.so'
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self.process_timeout_seconds = int(CONFIG.get("SANDBOX_PYTHON_PROCESS_TIMEOUT_SECONDS", '3600'))
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try:
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self._init_dir()
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except Exception as e:
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# 本机忽略异常，容器内不忽略
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maxkb_logger.error(f'Exception: {e}', exc_info=True)
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if self.sandbox:
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raise e
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def _init_dir(self):
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try:
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# 只初始化一次
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fd = os.open(os.path.join(PROJECT_DIR, 'tmp', 'tool_executor_init_dir.lock'),
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os.O_CREAT | os.O_EXCL | os.O_WRONLY)
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os.close(fd)
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except FileExistsError:
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# 文件已存在 → 已初始化过
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return
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maxkb_logger.debug("init dir")
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if self.sandbox:
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try:
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os.system("chmod -R g-rwx /dev/shm /dev/mqueue")
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os.system("chmod o-rwx /run/postgresql")
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except Exception as e:
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maxkb_logger.warning(f'Exception: {e}', exc_info=True)
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pass
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if CONFIG.get("SANDBOX_TMP_DIR_ENABLED", '0') == "1":
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tmp_dir_path = os.path.join(self.sandbox_path, 'tmp')
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os.makedirs(tmp_dir_path, 0o700, exist_ok=True)
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os.system(f"chown -R {self.user}:root {tmp_dir_path}")
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# 初始化sandbox配置文件
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sandbox_lib_path = os.path.dirname(self.sandbox_so_path)
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sandbox_conf_file_path = f'{sandbox_lib_path}/.sandbox.conf'
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if os.path.exists(sandbox_conf_file_path):
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os.remove(sandbox_conf_file_path)
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allow_subprocess = CONFIG.get("SANDBOX_PYTHON_ALLOW_SUBPROCESS", '0')
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banned_hosts = CONFIG.get("SANDBOX_PYTHON_BANNED_HOSTS", '').strip()
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if banned_hosts:
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hostname = socket.gethostname()
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local_ip = socket.gethostbyname(hostname)
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banned_hosts = f"{banned_hosts},{hostname},{local_ip}"
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with open(sandbox_conf_file_path, "w") as f:
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f.write(f"SANDBOX_PYTHON_BANNED_HOSTS={banned_hosts}\n")
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f.write(f"SANDBOX_PYTHON_ALLOW_SUBPROCESS={allow_subprocess}\n")
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os.system(f"chmod -R 550 {sandbox_lib_path}")
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def exec_code(self, code_str, keywords, function_name=None):
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_id = str(uuid.uuid7())
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success = '{"code":200,"msg":"成功","data":exec_result}'
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err = '{"code":500,"msg":str(e),"data":None}'
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action_function = f'({function_name !a}, locals_v.get({function_name !a}))' if function_name else 'locals_v.popitem()'
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result_path = f'{self.sandbox_path}/result/{_id}.result'
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python_paths = CONFIG.get_sandbox_python_package_paths().split(',')
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_exec_code = f"""
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try:
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import os, sys, json, base64, builtins
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path_to_exclude = ['/opt/py3/lib/python3.11/site-packages', '/opt/maxkb-app/apps']
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sys.path = [p for p in sys.path if p not in path_to_exclude]
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sys.path += {python_paths}
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locals_v={'{}'}
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keywords={keywords}
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globals_v={'{}'}
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os.environ.clear()
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exec({dedent(code_str)!a}, globals_v, locals_v)
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f_name, f = {action_function}
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for local in locals_v:
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globals_v[local] = locals_v[local]
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exec_result=f(**keywords)
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builtins.print("\\n{_id}:"+base64.b64encode(json.dumps({success}, default=str).encode()).decode())
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except Exception as e:
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builtins.print("\\n{_id}:"+base64.b64encode(json.dumps({err}, default=str).encode()).decode())
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"""
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if self.sandbox:
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subprocess_result = self._exec_sandbox(_exec_code)
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else:
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subprocess_result = self._exec(_exec_code)
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if subprocess_result.returncode == 1:
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raise Exception(subprocess_result.stderr)
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lines = subprocess_result.stdout.splitlines()
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result_line = [line for line in lines if line.startswith(_id)]
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if not result_line:
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raise Exception("No result found.")
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result = json.loads(base64.b64decode(result_line[-1].split(":", 1)[1]).decode())
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if result.get('code') == 200:
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return result.get('data')
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raise Exception(result.get('msg'))
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def _generate_mcp_server_code(self, _code, params):
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# 解析代码，提取导入语句和函数定义
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try:
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tree = ast.parse(_code)
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except SyntaxError:
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return _code
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imports = []
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functions = []
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other_code = []
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for node in tree.body:
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if isinstance(node, ast.Import) or isinstance(node, ast.ImportFrom):
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imports.append(ast.unparse(node))
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elif isinstance(node, ast.FunctionDef):
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# 修改函数参数以包含 params 中的默认值
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arg_names = [arg.arg for arg in node.args.args]
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# 为参数添加默认值，确保参数顺序正确
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defaults = []
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num_defaults = 0
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# 从后往前检查哪些参数有默认值
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for i, arg_name in enumerate(arg_names):
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if arg_name in params:
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num_defaults = len(arg_names) - i
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break
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# 为有默认值的参数创建默认值列表
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if num_defaults > 0:
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for i in range(len(arg_names) - num_defaults, len(arg_names)):
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arg_name = arg_names[i]
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if arg_name in params:
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default_value = params[arg_name]
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if isinstance(default_value, str):
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defaults.append(ast.Constant(value=default_value))
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elif isinstance(default_value, (int, float, bool)):
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defaults.append(ast.Constant(value=default_value))
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elif default_value is None:
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defaults.append(ast.Constant(value=None))
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else:
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defaults.append(ast.Constant(value=str(default_value)))
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else:
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# 如果某个参数没有默认值，需要添加 None 占位
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defaults.append(ast.Constant(value=None))
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node.args.defaults = defaults
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func_code = ast.unparse(node)
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functions.append(f"@mcp.tool()\n{func_code}\n")
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else:
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other_code.append(ast.unparse(node))
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# 构建完整的 MCP 服务器代码
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code_parts = ["from mcp.server.fastmcp import FastMCP"]
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code_parts.extend(imports)
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code_parts.append(f"\nmcp = FastMCP(\"{uuid.uuid7()}\")\n")
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code_parts.extend(other_code)
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code_parts.extend(functions)
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code_parts.append("\nmcp.run(transport=\"stdio\")\n")
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return "\n".join(code_parts)
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def generate_mcp_server_code(self, code_str, params):
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python_paths = CONFIG.get_sandbox_python_package_paths().split(',')
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code = self._generate_mcp_server_code(code_str, params)
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return f"""
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import os, sys, logging
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logging.basicConfig(level=logging.WARNING)
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logging.getLogger("mcp").setLevel(logging.ERROR)
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logging.getLogger("mcp.server").setLevel(logging.ERROR)
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path_to_exclude = ['/opt/py3/lib/python3.11/site-packages', '/opt/maxkb-app/apps']
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sys.path = [p for p in sys.path if p not in path_to_exclude]
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sys.path += {python_paths}
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os.environ.clear()
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exec({dedent(code)!a})
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"""
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def get_tool_mcp_config(self, code, params):
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_code = self.generate_mcp_server_code(code, params)
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maxkb_logger.debug(f"Python code of mcp tool: {_code}")
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compressed_and_base64_encoded_code_str = base64.b64encode(gzip.compress(_code.encode())).decode()
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if self.sandbox:
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tool_config = {
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'command': 'su',
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'args': [
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'-s', sys.executable,
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'-c',
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f'import base64,gzip; exec(gzip.decompress(base64.b64decode(\'{compressed_and_base64_encoded_code_str}\')).decode())',
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self.user,
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],
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'cwd': self.sandbox_path,
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'env': {
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'LD_PRELOAD': self.sandbox_so_path,
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},
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'transport': 'stdio',
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}
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else:
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tool_config = {
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'command': sys.executable,
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'args': [
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'-c',
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f'import base64,gzip; exec(gzip.decompress(base64.b64decode(\'{compressed_and_base64_encoded_code_str}\')).decode())',
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],
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'transport': 'stdio',
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}
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return tool_config
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def _exec_sandbox(self, _code):
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kwargs = {'cwd': BASE_DIR, 'env': {
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'LD_PRELOAD': self.sandbox_so_path,
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}}
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maxkb_logger.debug(f"Sandbox execute code: {_code}")
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compressed_and_base64_encoded_code_str = base64.b64encode(gzip.compress(_code.encode())).decode()
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cmd = [
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'su', '-s', python_directory, '-c',
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f'import base64,gzip; exec(gzip.decompress(base64.b64decode(\'{compressed_and_base64_encoded_code_str}\')).decode())',
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self.user
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]
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try:
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proc = subprocess.Popen(
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cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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text=True,
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**kwargs,
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start_new_session=True
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)
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proc.wait(timeout=self.process_timeout_seconds)
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return subprocess.CompletedProcess(
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proc.args,
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proc.returncode,
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proc.stdout.read(),
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proc.stderr.read()
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)
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except subprocess.TimeoutExpired:
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pgid = os.getpgid(proc.pid)
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os.killpg(pgid, signal.SIGTERM) #温和终止
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time.sleep(1) #留出短暂时间让进程清理
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if proc.poll() is None: #如果仍未终止，强制终止
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os.killpg(pgid, signal.SIGKILL)
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proc.wait()
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raise Exception(_(f"Process execution timed out after {self.process_timeout_seconds} seconds."))
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def validate_mcp_transport(self, code_str):
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servers = json.loads(code_str)
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for server, config in servers.items():
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if config.get('transport') not in ['sse', 'streamable_http']:
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raise Exception(_('Only support transport=sse or transport=streamable_http'))
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@staticmethod
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def _exec(_code):
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return subprocess.run([python_directory, '-c', _code], text=True, capture_output=True)
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