mirror of
https://github.com/1Panel-dev/MaxKB.git
synced 2025-12-26 10:12:51 +00:00
247 lines
11 KiB
Python
247 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 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 tempfile
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import pwd
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import resource
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import getpass
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import random
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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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_enable_sandbox = bool(CONFIG.get('SANDBOX', 0))
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_run_user = 'sandbox' if _enable_sandbox else getpass.getuser()
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_sandbox_path = CONFIG.get("SANDBOX_HOME", '/opt/maxkb-app/sandbox') if _enable_sandbox else os.path.join(PROJECT_DIR, 'data', 'sandbox')
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_process_limit_timeout_seconds = int(CONFIG.get("SANDBOX_PYTHON_PROCESS_LIMIT_TIMEOUT_SECONDS", '3600'))
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_process_limit_cpu_cores = min(max(int(CONFIG.get("SANDBOX_PYTHON_PROCESS_LIMIT_CPU_CORES", '1')), 1), len(os.sched_getaffinity(0))) if sys.platform.startswith("linux") else os.cpu_count() # 只支持linux，window和mac不支持
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_process_limit_mem_mb = int(CONFIG.get("SANDBOX_PYTHON_PROCESS_LIMIT_MEM_MB", '256'))
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class ToolExecutor:
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def __init__(self):
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pass
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@staticmethod
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def init_sandbox_dir():
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if not _enable_sandbox:
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# 不启用sandbox就不初始化目录
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return
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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.info("Init sandbox dir.")
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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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os.system("chmod g+rwx /tmp")
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# 初始化sandbox配置文件
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sandbox_lib_path = os.path.dirname(f'{_sandbox_path}/lib/sandbox.so')
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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_path}")
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try:
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init_sandbox_dir()
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except Exception as e:
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maxkb_logger.error(f'Exception: {e}', exc_info=True)
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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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action_function = f'({function_name !a}, locals_v.get({function_name !a}))' if function_name else 'locals_v.popitem()'
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python_paths = CONFIG.get_sandbox_python_package_paths().split(',')
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set_run_user = f'os.setgid({pwd.getpwnam(_run_user).pw_gid});os.setuid({pwd.getpwnam(_run_user).pw_uid});' if _enable_sandbox else ''
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_exec_code = f"""
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try:
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import os, sys, json
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from contextlib import redirect_stdout
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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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{set_run_user}
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os.environ.clear()
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with redirect_stdout(open(os.devnull, 'w')):
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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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globals_v.update(locals_v)
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exec_result=f(**keywords)
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sys.stdout.write("\\n{_id}:")
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json.dump({{'code':200,'msg':'success','data':exec_result}}, sys.stdout, default=str)
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except Exception as e:
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if isinstance(e, MemoryError): e = Exception("Cannot allocate more memory: exceeded the limit of {_process_limit_mem_mb} MB.")
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sys.stdout.write("\\n{_id}:")
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json.dump({{'code':500,'msg':str(e),'data':None}}, sys.stdout, default=str)
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sys.stdout.flush()
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"""
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maxkb_logger.debug(f"Sandbox execute code: {_exec_code}")
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with tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=True) as f:
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f.write(_exec_code)
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f.flush()
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subprocess_result = self._exec(f.name)
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if subprocess_result.returncode != 0:
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raise Exception(subprocess_result.stderr or subprocess_result.stdout or "Unknown exception occurred")
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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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maxkb_logger.error("\n".join(lines))
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raise Exception("No result found.")
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result = json.loads(result_line[-1].split(":", 1)[1])
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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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set_run_user = f'os.setgid({pwd.getpwnam(_run_user).pw_gid});os.setuid({pwd.getpwnam(_run_user).pw_uid});' if _enable_sandbox else ''
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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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{set_run_user}
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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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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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'cwd': _sandbox_path,
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'env': {
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'LD_PRELOAD': f'{_sandbox_path}/lib/sandbox.so',
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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(self, execute_file):
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kwargs = {'cwd': BASE_DIR, 'env': {
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'LD_PRELOAD': f'{_sandbox_path}/lib/sandbox.so',
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}}
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try:
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subprocess_result = subprocess.run(
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[sys.executable, execute_file],
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timeout=_process_limit_timeout_seconds,
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text=True,
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capture_output=True,
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**kwargs,
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preexec_fn=(lambda: None if (not _enable_sandbox or not sys.platform.startswith("linux")) else (
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resource.setrlimit(resource.RLIMIT_AS, (_process_limit_mem_mb * 1024 * 1024,) * 2),
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os.sched_setaffinity(0, set(random.sample(list(os.sched_getaffinity(0)), _process_limit_cpu_cores)))
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))
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)
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return subprocess_result
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except subprocess.TimeoutExpired:
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raise Exception(_(f"Process execution timed out after {_process_limit_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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