crafty-4/app/classes/minecraft/mc_ping.py

from app.classes.shared.helpers import Helpers
import struct
import socket
import base64
import json
import sys
import os
import logging.config
from app.classes.shared.console import console

logger = logging.getLogger(__name__)


class Server:
    def __init__(self, data):
        self.description = data.get('description')
        # print(self.description)
        if isinstance(self.description, dict):

            # cat server
            if "translate" in self.description:
                self.description = self.description['translate']

            # waterfall / bungee
            elif 'extra' in self.description:
                lines = []

                description = self.description
                if 'extra' in description.keys():
                    for e in description['extra']:
                        #Conversion format code needed only for Java Version
                        lines.append(get_code_format("reset"))
                        if "bold" in e.keys():
                            lines.append(get_code_format("bold"))
                        if "italic" in e.keys():
                            lines.append(get_code_format("italic"))
                        if "underlined" in e.keys():
                            lines.append(get_code_format("underlined"))
                        if "strikethrough" in e.keys():
                            lines.append(get_code_format("strikethrough"))
                        if "obfuscated" in e.keys():
                            lines.append(get_code_format("obfuscated"))
                        if "color" in e.keys():
                            lines.append(get_code_format(e['color']))                        
                        #Then append the text
                        if "text" in e.keys():
                            if e['text'] == '\n':
                                lines.append("§§")
                            else:
                                lines.append(e['text'])

                total_text = " ".join(lines)
                self.description = total_text

            # normal MC
            else:
                self.description = self.description['text']

        self.icon = base64.b64decode(data.get('favicon', '')[22:])
        self.players = Players(data['players']).report()
        self.version = data['version']['name']
        self.protocol = data['version']['protocol']


class Players(list):
    def __init__(self, data):
        super().__init__(Player(x) for x in data.get('sample', []))
        self.max = data['max']
        self.online = data['online']

    def report(self):
        players = []

        for x in self:
            players.append(str(x))

        r_data = {
            'online': self.online,
            'max': self.max,
            'players': players
        }

        return json.dumps(r_data)


class Player:
    def __init__(self, data):
        self.id = data['id']
        self.name = data['name']

    def __str__(self):
        return self.name

def get_code_format(format_name):
    root_dir = os.path.abspath(os.path.curdir)
    format_file = os.path.join(root_dir, 'app', 'config', 'motd_format.json')
    try:
        with open(format_file, "r", encoding='utf-8') as f:
            data = json.load(f)

        if format_name in data.keys():
            return data.get(format_name)
        else:
            logger.error("Format MOTD Error: format name {} does not exist".format(format_name))
            console.error("Format MOTD Error: format name {} does not exist".format(format_name))
            return ""

    except Exception as e:
        logger.critical("Config File Error: Unable to read {} due to {}".format(format_file, e))
        console.critical("Config File Error: Unable to read {} due to {}".format(format_file, e))

    return ""


# For the rest of requests see wiki.vg/Protocol
def ping(ip, port):
    def read_var_int():
        i = 0
        j = 0
        while True:
            k = sock.recv(1)
            if not k:
                return 0
            k = k[0]
            i |= (k & 0x7f) << (j * 7)
            j += 1
            if j > 5:
                raise ValueError('var_int too big')
            if not (k & 0x80):
                return i

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try:
        sock.connect((ip, port))

    except socket.error as err:
        pass
        return False

    try:
        host = ip.encode('utf-8')
        data = b''  # wiki.vg/Server_List_Ping
        data += b'\x00'  # packet ID
        data += b'\x04'  # protocol variant
        data += struct.pack('>b', len(host)) + host
        data += struct.pack('>H', port)
        data += b'\x01'  # next state
        data = struct.pack('>b', len(data)) + data
        sock.sendall(data + b'\x01\x00')  # handshake + status ping
        length = read_var_int()  # full packet length
        if length < 10:
            if length < 0:
                return False
            else:
                return False

        sock.recv(1)  # packet type, 0 for pings
        length = read_var_int()  # string length
        data = b''
        while len(data) != length:
            chunk = sock.recv(length - len(data))
            if not chunk:
                return False

            data += chunk
        logger.debug("Server reports this data on ping: {}".format(data))
        return Server(json.loads(data))
    finally:
        sock.close()