Current File : //opt/imunify360/venv/lib/python3.11/site-packages/defence360agent/api/server/send_message.py

import base64
import json
import os
import time
import urllib.error
import urllib.request
from abc import ABC, abstractmethod
from logging import getLogger
from typing import Optional
import asyncio

from defence360agent.api.server import (
    API,
    APIError,
    APITokenError,
    FGWSendMessgeException,
)
from defence360agent.contracts.config import Core
from defence360agent.contracts.messages import Message
from defence360agent.internals.global_scope import g
from defence360agent.internals.iaid import (
    IndependentAgentIDAPI,
    IAIDTokenError,
)
from defence360agent.utils.async_utils import AsyncIterate
from defence360agent.utils.json import ServerJSONEncoder

logger = getLogger(__name__)


class BaseSendMessageAPI(API, ABC):
    URL = "/api/v2/send-message/{method}"

    @abstractmethod
    async def _send_request(self, message_method, headers, post_data) -> dict:
        pass  # pragma: no cover

    def check_response(self, result: dict) -> None:
        if "status" not in result:
            raise APIError("unexpected server response: {!r}".format(result))
        if result["status"] != "ok":
            raise APIError("server error: {}".format(result.get("msg")))

    async def send_data(self, method: str, post_data: bytes) -> None:
        try:
            token = await IndependentAgentIDAPI.get_token()
        except IAIDTokenError as e:
            raise APITokenError(f"IAID token error occurred {e}")
        headers = {
            "Content-Type": "application/json",
            "X-Auth": token,
        }
        result = await self._send_request(method, headers, post_data)
        self.check_response(result)


class SendMessageAPI(BaseSendMessageAPI):
    _SOCKET_TIMEOUT = Core.DEFAULT_SOCKET_TIMEOUT

    def __init__(self, rpm_ver: str, base_url: str = None, executor=None):
        self._executor = executor
        self.rpm_ver = rpm_ver
        self.product_name = ""
        self.server_id = None  # type: Optional[str]
        self.license = {}  # type: dict
        if base_url:
            self.base_url = base_url
        else:
            self.base_url = self._BASE_URL

    def set_product_name(self, product_name: str) -> None:
        self.product_name = product_name

    def set_server_id(self, server_id: Optional[str]) -> None:
        self.server_id = server_id

    def set_license(self, license: dict) -> None:
        self.license = license

    async def _send_request(self, message_method, headers, post_data):
        request = urllib.request.Request(
            self.base_url + self.URL.format(method=message_method),
            data=post_data,
            headers=headers,
            method="POST",
        )
        return await self.async_request(request, executor=self._executor)

    async def send_message(self, message: Message) -> None:
        # add message handling time if it does not exist, so that
        # the server does not depend on the time it was received
        if "timestamp" not in message:
            message["timestamp"] = time.time()

        data2send = {
            "payload": message.payload,
            "rpm_ver": self.rpm_ver,
            "message_id": message.message_id,
            "server_id": self.server_id,
            "name": self.product_name,
        }
        post_data = json.dumps(data2send, cls=ServerJSONEncoder).encode()
        await self.send_data(message.method, post_data)


class FileBasedGatewayAPI(SendMessageAPI):
    async def _prepare_message(self, message, semaphore) -> dict:
        async with semaphore:
            loaded = await asyncio.to_thread(json.loads, message)
            return {
                "method": loaded["method"],
                "data": {k: v for k, v in loaded.items() if k != "method"},
            }

    async def send_messages(self, messages: list[tuple[float, bytes]]) -> None:
        max_threads = 5
        semaphore = asyncio.Semaphore(max_threads)
        tasks = [
            self._prepare_message(msg, semaphore)
            async for _, msg in AsyncIterate(messages)
        ]
        prepared_messages = await asyncio.gather(*tasks)

        dumped_messages = await asyncio.to_thread(
            json.dumps, prepared_messages
        )

        bin_file_path = os.getenv(
            "I360_MESSAGE_GATEWAY_BIN_PATH", "/usr/libexec/"
        )
        bin_file = os.path.join(bin_file_path, "imunify-message-gateway")

        command = [
            bin_file,
            "send-many",
            "--producer=i360-agent-non-resident",
        ]

        process = await asyncio.create_subprocess_exec(
            *command,
            stdin=asyncio.subprocess.PIPE,
            stdout=asyncio.subprocess.PIPE,
            stderr=asyncio.subprocess.PIPE,
        )
        b64data = base64.b64encode(dumped_messages.encode())
        stdout, stderr = await process.communicate(input=b64data)
        if g.get("DEBUG"):
            logger.info(
                "Message sent to fgw: %s %s %s", len(messages), stdout, stderr
            )

        if process.returncode != 0:
            logger.error(f"Error sending message: {stderr.decode()}")
            raise FGWSendMessgeException(
                str(f"Error sending message: {stderr.decode()}")
            )