artemis/titles/diva/index.py

from twisted.web.http import Request
import yaml
import logging, coloredlogs
from logging.handlers import TimedRotatingFileHandler
import zlib
import json
import base64

from titles.diva.handlers.base import *
from core.config import CoreConfig
from titles.diva.config import DivaConfig
from titles.diva.base import DivaBase

class DivaServlet():
    def __init__(self, core_cfg: CoreConfig, cfg_dir: str) -> None:
        self.core_cfg = core_cfg
        self.game_cfg = DivaConfig()
        self.game_cfg.update(yaml.safe_load(open(f"{cfg_dir}/diva.yaml")))

        self.base = DivaBase(core_cfg, self.game_cfg)

        self.logger = logging.getLogger("diva")
        log_fmt_str = "[%(asctime)s] Diva | %(levelname)s | %(message)s"
        log_fmt = logging.Formatter(log_fmt_str)
        fileHandler = TimedRotatingFileHandler("{0}/{1}.log".format(self.core_cfg.server.log_dir, "diva"), encoding='utf8',
            when="d", backupCount=10)

        fileHandler.setFormatter(log_fmt)
        
        consoleHandler = logging.StreamHandler()
        consoleHandler.setFormatter(log_fmt)

        self.logger.addHandler(fileHandler)
        self.logger.addHandler(consoleHandler)
        
        self.logger.setLevel(self.game_cfg.server.loglevel)
        coloredlogs.install(level=self.game_cfg.server.loglevel, logger=self.logger, fmt=log_fmt_str)
    
    def render_POST(self, req: Request, version: int, url_path: str) -> bytes:
        req_raw = req.content.getvalue()
        url_header = req.getAllHeaders()
        req.responseHeaders.addRawHeader(b"content-type", b"text/plain")

        if "THIS_STRING_SEPARATES" in str(url_header):
            binary_request = req_raw.splitlines()
            binary_cmd_decoded = binary_request[3].decode("utf-8")
            self.logger.debug(f"Binary request {binary_request}")
            
            req_cls = BaseBinaryRequest(binary_cmd_decoded)

        else:
            json_string = json.dumps(req_raw.decode("utf-8")) #Take the response and decode as UTF-8 and dump
            b64string = json_string.replace(r'\n', '\n') # Remove all \n and separate them as new lines
            gz_string = base64.b64decode(b64string) # Decompressing the base64 string
            
            try:
                url_data = zlib.decompress( gz_string ).decode("utf-8", errors="replace") # Decompressing the gzip
            except zlib.error as e:
                self.logger.error(f"Failed to defalte! {e} -> {gz_string}")
                return "stat=0"
            
            try:
                req_cls = BaseRequest(url_data)
            except DivaRequestParseException as e:
                self.logger.error(e)
                return b""
            
            self.logger.debug(f"Request: {req_cls.raw_dict}\nHeaders: {url_header}")
        
        handler_str = f"handle_{req_cls.cmd}_request"

        if not hasattr(self.base, handler_str):
            self.logger.warn(f"Unhandled cmd {req_cls.cmd}")
            return BaseResponse(req_cls.cmd, req_cls.req_id).make().encode()
        
        handler = getattr(self.base, handler_str)
        return handler(req_cls.raw).encode(errors="ignore")