userType: external

slug: fancy-launching-pearl

type: user

role: user

content:
Read and analyze the proxy server at ~/Services/servers/ip-whitelist-proxy.py to understand:
1. What data/stats it exposes via /_proxy/status and /_proxy/whitelist endpoints
2. The JSON structure of responses
3. What metrics are tracked (requests, bytes, blocked IPs, etc.)
4. How we could extend it to support WebSocket for real-time updates to an iOS app

Return the API structure and suggestions for real-time monitoring capabilities.


type: message

role: assistant

type: text

text: I'll read and analyze the proxy server file to understand its current API structure and suggest improvements for real-time monitoring.

service_tier: standard

type: assistant


content:
     1→#!/usr/bin/env python3
     2→"""
     3→IP Whitelist Proxy Server
     4→Proxy HTTP com whitelist de IPs suportando subnets CIDR (ex: 192.168.1.0/24)
     5→
     6→Uso:
     7→    python3 ip-whitelist-proxy.py [--port 8888] [--whitelist whitelist.txt]
     8→
     9→Configuração da whitelist (um por linha):
    10→    192.168.1.0/24
    11→    10.0.0.0/8
    12→    100.75.88.8
    13→    # Comentários são ignorados
    14→"""
    15→
    16→import argparse
    17→import http.server
    18→import ipaddress
    19→import json
    20→import logging
    21→import os
    22→import socketserver
    23→import ssl
    24→import sys
    25→import threading
    26→import urllib.request
    27→import urllib.error
    28→from datetime import datetime
    29→from pathlib import Path
    30→from typing import Set, Union
    31→from http.client import HTTPResponse
    32→
    33→# Configuração de logging
    34→logging.basicConfig(
    35→    level=logging.INFO,
    36→    format='%(asctime)s | %(levelname)s | %(message)s',
    37→    datefmt='%Y-%m-%d %H:%M:%S'
    38→)
    39→logger = logging.getLogger('proxy')
    40→
    41→# Configurações padrão
    42→DEFAULT_PORT = 8888
    43→DEFAULT_WHITELIST = [
    44→    '127.0.0.1',
    45→    '::1',  # localhost IPv6
    46→    '192.168.1.0/24',
    47→    '10.0.0.0/8',
    48→    '100.64.0.0/10',  # Tailscale CGNAT range
    49→]
    50→
    51→
    52→class IPWhitelist:
    53→    """Gerencia whitelist de IPs com suporte a subnets CIDR"""
    54→
    55→    def __init__(self):
    56→        self.networks: Set[Union[ipaddress.IPv4Network, ipaddress.IPv6Network]] = set()
    57→        self.single_ips: Set[Union[ipaddress.IPv4Address, ipaddress.IPv6Address]] = set()
    58→        self._lock = threading.Lock()
    59→
    60→    def add(self, ip_or_network: str) -> bool:
    61→        """Adiciona IP ou subnet à whitelist"""
    62→        ip_or_network = ip_or_network.strip()
    63→
    64→        if not ip_or_network or ip_or_network.startswith('#'):
    65→            return False
    66→
    67→        try:
    68→            with self._lock:
    69→                if '/' in ip_or_network:
    70→                    # É uma subnet (CIDR)
    71→                    network = ipaddress.ip_network(ip_or_network, strict=False)
    72→                    self.networks.add(network)
    73→                    logger.info(f"Subnet adicionada: {network}")
    74→                else:
    75→                    # É um IP único
    76→                    ip = ipaddress.ip_address(ip_or_network)
    77→                    self.single_ips.add(ip)
    78→                    logger.info(f"IP adicionado: {ip}")
    79→                return True
    80→        except ValueError as e:
    81→            logger.warning(f"IP/subnet inválido ignorado: {ip_or_network} ({e})")
    82→            return False
    83→
    84→    def remove(self, ip_or_network: str) -> bool:
    85→        """Remove IP ou subnet da whitelist"""
    86→        try:
    87→            with self._lock:
    88→                if '/' in ip_or_network:
    89→                    network = ipaddress.ip_network(ip_or_network, strict=False)
    90→                    self.networks.discard(network)
    91→                else:
    92→                    ip = ipaddress.ip_address(ip_or_network)
    93→                    self.single_ips.discard(ip)
    94→                return True
    95→        except ValueError:
    96→            return False
    97→
    98→    def is_allowed(self, ip_str: str) -> bool:
    99→        """Verifica se um IP está na whitelist"""
   100→        try:
   101→            ip = ipaddress.ip_address(ip_str)
   102→
   103→            with self._lock:
   104→                # Verifica IPs únicos
   105→                if ip in self.single_ips:
   106→                    return True
   107→
   108→                # Verifica subnets
   109→                for network in self.networks:
   110→                    if ip in network:
   111→                        return True
   112→
   113→                return False
   114→        except ValueError:
   115→            logger.warning(f"IP inválido para verificação: {ip_str}")
   116→            return False
   117→
   118→    def load_from_file(self, filepath: str) -> int:
   119→        """Carrega whitelist de arquivo (um IP/subnet por linha)"""
   120→        count = 0
   121→        try:
   122→            with open(filepath, 'r') as f:
   123→                for line in f:
   124→                    line = line.strip()
   125→                    if line and not line.startswith('#'):
   126→                        if self.add(line):
   127→                            count += 1
   128→            logger.info(f"Carregados {count} IPs/subnets de {filepath}")
   129→        except FileNotFoundError:
   130→            logger.warning(f"Arquivo não encontrado: {filepath}")
   131→        except Exception as e:
   132→            logger.error(f"Erro ao carregar whitelist: {e}")
   133→        return count
   134→
   135→    def load_from_list(self, items: list) -> int:
   136→        """Carrega whitelist de uma lista"""
   137→        count = 0
   138→        for item in items:
   139→            if self.add(item):
   140→                count += 1
   141→        return count
   142→
   143→    def get_all(self) -> dict:
   144→        """Retorna todos os IPs e subnets"""
   145→        with self._lock:
   146→            return {
   147→                'single_ips': [str(ip) for ip in self.single_ips],
   148→                'networks': [str(net) for net in self.networks],
   149→                'total': len(self.single_ips) + len(self.networks)
   150→            }
   151→
   152→    def __len__(self):
   153→        with self._lock:
   154→            return len(self.single_ips) + len(self.networks)
   155→
   156→
   157→class ProxyHandler(http.server.BaseHTTPRequestHandler):
   158→    """Handler HTTP com whitelist de IPs"""
   159→
   160→    whitelist: IPWhitelist = None
   161→    stats = {
   162→        'requests_total': 0,
   163→        'requests_allowed': 0,
   164→        'requests_blocked': 0,
   165→        'bytes_transferred': 0,
   166→        'start_time': None
   167→    }
   168→    stats_lock = threading.Lock()
   169→
   170→    def log_message(self, format, *args):
   171→        """Override para usar nosso logger"""
   172→        client_ip = self.client_address[0]
   173→        logger.info(f"{client_ip} - {format % args}")
   174→
   175→    def check_whitelist(self) -> bool:
   176→        """Verifica se o cliente está na whitelist"""
   177→        client_ip = self.client_address[0]
   178→
   179→        if self.whitelist and not self.whitelist.is_allowed(client_ip):
   180→            self.send_error_response(403, f"IP {client_ip} não autorizado")
   181→            with self.stats_lock:
   182→                self.stats['requests_blocked'] += 1
   183→            logger.warning(f"BLOQUEADO: {client_ip}")
   184→            return False
   185→
   186→        with self.stats_lock:
   187→            self.stats['requests_allowed'] += 1
   188→        return True
   189→
   190→    def send_error_response(self, code: int, message: str):
   191→        """Envia resposta de erro JSON"""
   192→        self.send_response(code)
   193→        self.send_header('Content-Type', 'application/json')
   194→        self.send_header('Access-Control-Allow-Origin', '*')
   195→        self.end_headers()
   196→
   197→        response = json.dumps({
   198→            'error': True,
   199→            'code': code,
   200→            'message': message,
   201→            'timestamp': datetime.now().isoformat()
   202→        })
   203→        self.wfile.write(response.encode())
   204→
   205→    def proxy_request(self, method: str):
   206→        """Faz proxy da requisição"""
   207→        with self.stats_lock:
   208→            self.stats['requests_total'] += 1
   209→
   210→        if not self.check_whitelist():
   211→            return
   212→
   213→        # Endpoints especiais de gerenciamento
   214→        if self.path == '/_proxy/status':
   215→            self.handle_status()
   216→            return
   217→        elif self.path == '/_proxy/whitelist':
   218→            self.handle_whitelist_list()
   219→            return
   220→        elif self.path.startswith('/_proxy/'):
   221→            self.send_error_response(404, "Endpoint não encontrado")
   222→            return
   223→
   224→        # Extrai URL alvo
   225→        target_url = self.path
   226→        if not target_url.startswith(('http://', 'https://')):
   227→            self.send_error_response(400, "URL deve começar com http:// ou https://")
   228→            return
   229→
   230→        try:
   231→            # Prepara headers (remove hop-by-hop headers)
   232→            headers = {}
   233→            hop_by_hop = {'connection', 'keep-alive', 'proxy-authenticate',
   234→                         'proxy-authorization', 'te', 'trailers',
   235→                         'transfer-encoding', 'upgrade', 'host'}
   236→
   237→            for key, value in self.headers.items():
   238→                if key.lower() not in hop_by_hop:
   239→                    headers[key] = value
   240→
   241→            # Adiciona X-Forwarded-For
   242→            client_ip = self.client_address[0]
   243→            existing_xff = headers.get('X-Forwarded-For', '')
   244→            headers['X-Forwarded-For'] = f"{existing_xff}, {client_ip}".lstrip(', ')
   245→
   246→            # Lê body se houver
   247→            content_length = self.headers.get('Content-Length')
   248→            body = None
   249→            if content_length:
   250→                body = self.rfile.read(int(content_length))
   251→
   252→            # Faz a requisição
   253→            req = urllib.request.Request(
   254→                target_url,
   255→                data=body,
   256→                headers=headers,
   257→                method=method
   258→            )
   259→
   260→            # Configura timeout e SSL
   261→            context = ssl.create_default_context()
   262→            context.check_hostname = False
   263→            context.verify_mode = ssl.CERT_NONE
   264→
   265→            with urllib.request.urlopen(req, timeout=30, context=context) as response:
   266→                # Envia resposta
   267→                self.send_response(response.status)
   268→
   269→                # Copia headers (exceto hop-by-hop)
   270→                for key, value in response.headers.items():
   271→                    if key.lower() not in hop_by_hop:
   272→                        self.send_header(key, value)
   273→
   274→                self.send_header('Access-Control-Allow-Origin', '*')
   275→                self.end_headers()
   276→
   277→                # Copia body
   278→                data = response.read()
   279→                self.wfile.write(data)
   280→
   281→                with self.stats_lock:
   282→                    self.stats['bytes_transferred'] += len(data)
   283→
   284→                logger.info(f"PROXY: {method} {target_url} -> {response.status}")
   285→
   286→        except urllib.error.HTTPError as e:
   287→            self.send_response(e.code)
   288→            self.send_header('Content-Type', 'text/plain')
   289→            self.end_headers()
   290→            self.wfile.write(f"Erro upstream: {e.code} {e.reason}".encode())
   291→            logger.error(f"HTTP Error: {target_url} -> {e.code}")
   292→
   293→        except urllib.error.URLError as e:
   294→            self.send_error_response(502, f"Erro de conexão: {e.reason}")
   295→            logger.error(f"URL Error: {target_url} -> {e.reason}")
   296→
   297→        except Exception as e:
   298→            self.send_error_response(500, f"Erro interno: {str(e)}")
   299→            logger.exception(f"Erro ao fazer proxy: {e}")
   300→
   301→    def handle_status(self):
   302→        """Retorna status do proxy"""
   303→        with self.stats_lock:
   304→            uptime = 0
   305→            if self.stats['start_time']:
   306→                uptime = (datetime.now() - self.stats['start_time']).total_seconds()
   307→
   308→            status = {
   309→                'status': 'running',
   310→                'uptime_seconds': int(uptime),
   311→                'requests': {
   312→                    'total': self.stats['requests_total'],
   313→                    'allowed': self.stats['requests_allowed'],
   314→                    'blocked': self.stats['requests_blocked']
   315→                },
   316→                'bytes_transferred': self.stats['bytes_transferred'],
   317→                'whitelist_count': len(self.whitelist) if self.whitelist else 0
   318→            }
   319→
   320→        self.send_response(200)
   321→        self.send_header('Content-Type', 'application/json')
   322→        self.end_headers()
   323→        self.wfile.write(json.dumps(status, indent=2).encode())
   324→
   325→    def handle_whitelist_list(self):
   326→        """Lista whitelist atual"""
   327→        if not self.check_whitelist():
   328→            return
   329→
   330→        data = self.whitelist.get_all() if self.whitelist else {}
   331→
   332→        self.send_response(200)
   333→        self.send_header('Content-Type', 'application/json')
   334→        self.end_headers()
   335→        self.wfile.write(json.dumps(data, indent=2).encode())
   336→
   337→    # Handlers para cada método HTTP
   338→    def do_GET(self):
   339→        self.proxy_request('GET')
   340→
   341→    def do_POST(self):
   342→        self.proxy_request('POST')
   343→
   344→    def do_PUT(self):
   345→        self.proxy_request('PUT')
   346→
   347→    def do_DELETE(self):
   348→        self.proxy_request('DELETE')
   349→
   350→    def do_PATCH(self):
   351→        self.proxy_request('PATCH')
   352→
   353→    def do_HEAD(self):
   354→        self.proxy_request('HEAD')
   355→
   356→    def do_OPTIONS(self):
   357→        """CORS preflight"""
   358→        self.send_response(200)
   359→        self.send_header('Access-Control-Allow-Origin', '*')
   360→        self.send_header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS')
   361→        self.send_header('Access-Control-Allow-Headers', '*')
   362→        self.send_header('Access-Control-Max-Age', '86400')
   363→        self.end_headers()
   364→
   365→    def do_CONNECT(self):
   366→        """HTTPS tunneling (CONNECT method)"""
   367→        with self.stats_lock:
   368→            self.stats['requests_total'] += 1
   369→
   370→        if not self.check_whitelist():
   371→            return
   372→
   373→        # Parse host:port
   374→        try:
   375→            if ':' in self.path:
   376→                host, port = self.path.split(':')
   377→                port = int(port)
   378→            else:
   379→                host = self.path
   380→                port = 443
   381→        except ValueError:
   382→            self.send_error_response(400, "Formato inválido para CONNECT")
   383→            return
   384→
   385→        try:
   386→            import socket
   387→
   388→            # Conecta ao servidor destino
   389→            remote_socket = socket.create_connection((host, port), timeout=30)
   390→
   391→            # Envia 200 Connection Established
   392→            self.send_response(200, 'Connection Established')
   393→            self.end_headers()
   394→
   395→            # Faz tunnel bidirecional
   396→            self.connection.setblocking(False)
   397→            remote_socket.setblocking(False)
   398→
   399→            import select
   400→
   401→            sockets = [self.connection, remote_socket]
   402→            timeout = 60
   403→
   404→            while True:
   405→                readable, _, exceptional = select.select(sockets, [], sockets, timeout)
   406→
   407→                if exceptional:
   408→                    break
   409→
   410→                if not readable:
   411→                    break  # timeout
   412→
   413→                for sock in readable:
   414→                    try:
   415→                        data = sock.recv(8192)
   416→                        if not data:
   417→                            raise ConnectionError("Connection closed")
   418→
   419→                        if sock is self.connection:
   420→                            remote_socket.sendall(data)
   421→                        else:
   422→                            self.connection.sendall(data)
   423→
   424→                        with self.stats_lock:
   425→                            self.stats['bytes_transferred'] += len(data)
   426→
   427→                    except (BlockingIOError, ssl.SSLWantReadError):
   428→                        continue
   429→                    except Exception:
   430→                        break
   431→
   432→            remote_socket.close()
   433→            logger.info(f"TUNNEL: {host}:{port} closed")
   434→
   435→        except Exception as e:
   436→            self.send_error_response(502, f"Erro ao criar tunnel: {e}")
   437→            logger.error(f"CONNECT error: {host}:{port} -> {e}")
   438→
   439→
   440→class ThreadedHTTPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
   441→    """HTTP Server com suporte a threads"""
   442→    daemon_threads = True
   443→    allow_reuse_address = True
   444→
   445→
   446→def main():
   447→    parser = argparse.ArgumentParser(
   448→        description='Proxy HTTP com whitelist de IPs',
   449→        formatter_class=argparse.RawDescriptionHelpFormatter,
   450→        epilog="""
   451→Exemplos:
   452→    python3 ip-whitelist-proxy.py
   453→    python3 ip-whitelist-proxy.py --port 3128
   454→    python3 ip-whitelist-proxy.py --whitelist /path/to/whitelist.txt
   455→    python3 ip-whitelist-proxy.py --add-ip 203.0.113.50 --add-ip 198.51.100.0/24
   456→
   457→Formato do arquivo whitelist (um por linha):
   458→    192.168.1.0/24
   459→    10.0.0.0/8
   460→    100.75.88.8
   461→    # Comentários são ignorados
   462→
   463→Uso do proxy:
   464→    curl -x http://localhost:8888 http://example.com
   465→    curl --proxy http://localhost:8888 https://api.example.com/data
   466→
   467→Endpoints de gerenciamento:
   468→    http://localhost:8888/_proxy/status     - Status do proxy
   469→    http://localhost:8888/_proxy/whitelist  - Lista whitelist
   470→        """
   471→    )
   472→
   473→    parser.add_argument('-p', '--port', type=int, default=DEFAULT_PORT,
   474→                       help=f'Porta do proxy (default: {DEFAULT_PORT})')
   475→    parser.add_argument('-w', '--whitelist', type=str,
   476→                       help='Arquivo com whitelist de IPs')
   477→    parser.add_argument('--add-ip', action='append', dest='extra_ips',
   478→                       help='IPs/subnets adicionais (pode repetir)')
   479→    parser.add_argument('--no-defaults', action='store_true',
   480→                       help='Não carregar whitelist padrão')
   481→    parser.add_argument('-v', '--verbose', action='store_true',
   482→                       help='Modo verbose (debug)')
   483→
   484→    args = parser.parse_args()
   485→
   486→    if args.verbose:
   487→        logger.setLevel(logging.DEBUG)
   488→
   489→    # Inicializa whitelist
   490→    whitelist = IPWhitelist()
   491→
   492→    # Carrega defaults
   493→    if not args.no_defaults:
   494→        whitelist.load_from_list(DEFAULT_WHITELIST)
   495→        logger.info(f"Whitelist padrão carregada: {len(DEFAULT_WHITELIST)} entradas")
   496→
   497→    # Carrega de arquivo
   498→    if args.whitelist:
   499→        whitelist.load_from_file(args.whitelist)
   500→
   501→    # Adiciona IPs extras da linha de comando
   502→    if args.extra_ips:
   503→        for ip in args.extra_ips:
   504→            whitelist.add(ip)
   505→
   506→    # Configura handler
   507→    ProxyHandler.whitelist = whitelist
   508→    ProxyHandler.stats['start_time'] = datetime.now()
   509→
   510→    # Inicia servidor
   511→    server_address = ('0.0.0.0', args.port)
   512→    httpd = ThreadedHTTPServer(server_address, ProxyHandler)
   513→
   514→    print(f"""
   515→╔══════════════════════════════════════════════════════════════╗
   516→║              IP WHITELIST PROXY SERVER                       ║
   517→╠══════════════════════════════════════════════════════════════╣
   518→║  Porta:     {args.port:<48}║
   519→║  Whitelist: {len(whitelist)} IPs/subnets{' ' * (38 - len(str(len(whitelist))))}║
   520→║  Bind:      0.0.0.0 (todas interfaces)                       ║
   521→╠══════════════════════════════════════════════════════════════╣
   522→║  Status:    http://localhost:{args.port}/_proxy/status{' ' * (24 - len(str(args.port)))}║
   523→║  Whitelist: http://localhost:{args.port}/_proxy/whitelist{' ' * (21 - len(str(args.port)))}║
   524→╚══════════════════════════════════════════════════════════════╝
   525→
   526→Uso: curl -x http://localhost:{args.port} http://example.com
   527→     curl --proxy http://localhost:{args.port} https://api.example.com
   528→
   529→Ctrl+C para parar
   530→""")
   531→
   532→    # Mostra whitelist atual
   533→    wl_data = whitelist.get_all()
   534→    if wl_data['single_ips']:
   535→        print(f"IPs únicos: {', '.join(wl_data['single_ips'])}")
   536→    if wl_data['networks']:
   537→        print(f"Subnets:    {', '.join(wl_data['networks'])}")
   538→    print()
   539→
   540→    try:
   541→        httpd.serve_forever()
   542→    except KeyboardInterrupt:
   543→        print("\n\nEncerrando proxy...")
   544→        httpd.shutdown()
   545→
   546→        # Mostra estatísticas finais
   547→        stats = ProxyHandler.stats
   548→        print(f"""
   549→Estatísticas finais:
   550→  Requisições totais:  {stats['requests_total']}
   551→  Permitidas:          {stats['requests_allowed']}
   552→  Bloqueadas:          {stats['requests_blocked']}
   553→  Bytes transferidos:  {stats['bytes_transferred']:,}
   554→""")
   555→
   556→
   557→if __name__ == '__main__':
   558→    main()
   559→

<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>

content:
#!/usr/bin/env python3
"""
IP Whitelist Proxy Server
Proxy HTTP com whitelist de IPs suportando subnets CIDR (ex: 192.168.1.0/24)

Uso:
    python3 ip-whitelist-proxy.py [--port 8888] [--whitelist whitelist.txt]

Configuração da whitelist (um por linha):
    192.168.1.0/24
    10.0.0.0/8
    100.75.88.8
    # Comentários são ignorados
"""

import argparse
import http.server
import ipaddress
import json
import logging
import os
import socketserver
import ssl
import sys
import threading
import urllib.request
import urllib.error
from datetime import datetime
from pathlib import Path
from typing import Set, Union
from http.client import HTTPResponse

# Configuração de logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s | %(levelname)s | %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S'
)
logger = logging.getLogger('proxy')

# Configurações padrão
DEFAULT_PORT = 8888
DEFAULT_WHITELIST = [
    '127.0.0.1',
    '::1',  # localhost IPv6
    '192.168.1.0/24',
    '10.0.0.0/8',
    '100.64.0.0/10',  # Tailscale CGNAT range
]

class IPWhitelist:
    """Gerencia whitelist de IPs com suporte a subnets CIDR"""

    def __init__(self):
        self.networks: Set[Union[ipaddress.IPv4Network, ipaddress.IPv6Network]] = set()
        self.single_ips: Set[Union[ipaddress.IPv4Address, ipaddress.IPv6Address]] = set()
        self._lock = threading.Lock()

    def add(self, ip_or_network: str) -> bool:
        """Adiciona IP ou subnet à whitelist"""
        ip_or_network = ip_or_network.strip()

        if not ip_or_network or ip_or_network.startswith('#'):
            return False

        try:
            with self._lock:
                if '/' in ip_or_network:
                    # É uma subnet (CIDR)
                    network = ipaddress.ip_network(ip_or_network, strict=False)
                    self.networks.add(network)
                    logger.info(f"Subnet adicionada: {network}")
                else:
                    # É um IP único
                    ip = ipaddress.ip_address(ip_or_network)
                    self.single_ips.add(ip)
                    logger.info(f"IP adicionado: {ip}")
                return True
        except ValueError as e:
            logger.warning(f"IP/subnet inválido ignorado: {ip_or_network} ({e})")
            return False

    def remove(self, ip_or_network: str) -> bool:
        """Remove IP ou subnet da whitelist"""
        try:
            with self._lock:
                if '/' in ip_or_network:
                    network = ipaddress.ip_network(ip_or_network, strict=False)
                    self.networks.discard(network)
                else:
                    ip = ipaddress.ip_address(ip_or_network)
                    self.single_ips.discard(ip)
                return True
        except ValueError:
            return False

    def is_allowed(self, ip_str: str) -> bool:
        """Verifica se um IP está na whitelist"""
        try:
            ip = ipaddress.ip_address(ip_str)

            with self._lock:
                # Verifica IPs únicos
                if ip in self.single_ips:
                    return True

                # Verifica subnets
                for network in self.networks:
                    if ip in network:
                        return True

                return False
        except ValueError:
            logger.warning(f"IP inválido para verificação: {ip_str}")
            return False

    def load_from_file(self, filepath: str) -> int:
        """Carrega whitelist de arquivo (um IP/subnet por linha)"""
        count = 0
        try:
            with open(filepath, 'r') as f:
                for line in f:
                    line = line.strip()
                    if line and not line.startswith('#'):
                        if self.add(line):
                            count += 1
            logger.info(f"Carregados {count} IPs/subnets de {filepath}")
        except FileNotFoundError:
            logger.warning(f"Arquivo não encontrado: {filepath}")
        except Exception as e:
            logger.error(f"Erro ao carregar whitelist: {e}")
        return count

    def load_from_list(self, items: list) -> int:
        """Carrega whitelist de uma lista"""
        count = 0
        for item in items:
            if self.add(item):
                count += 1
        return count

    def get_all(self) -> dict:
        """Retorna todos os IPs e subnets"""
        with self._lock:
            return {
                'single_ips': [str(ip) for ip in self.single_ips],
                'networks': [str(net) for net in self.networks],
                'total': len(self.single_ips) + len(self.networks)
            }

    def __len__(self):
        with self._lock:
            return len(self.single_ips) + len(self.networks)

class ProxyHandler(http.server.BaseHTTPRequestHandler):
    """Handler HTTP com whitelist de IPs"""

    whitelist: IPWhitelist = None
    stats = {
        'requests_total': 0,
        'requests_allowed': 0,
        'requests_blocked': 0,
        'bytes_transferred': 0,
        'start_time': None
    }
    stats_lock = threading.Lock()

    def log_message(self, format, *args):
        """Override para usar nosso logger"""
        client_ip = self.client_address[0]
        logger.info(f"{client_ip} - {format % args}")

    def check_whitelist(self) -> bool:
        """Verifica se o cliente está na whitelist"""
        client_ip = self.client_address[0]

        if self.whitelist and not self.whitelist.is_allowed(client_ip):
            self.send_error_response(403, f"IP {client_ip} não autorizado")
            with self.stats_lock:
                self.stats['requests_blocked'] += 1
            logger.warning(f"BLOQUEADO: {client_ip}")
            return False

        with self.stats_lock:
            self.stats['requests_allowed'] += 1
        return True

    def send_error_response(self, code: int, message: str):
        """Envia resposta de erro JSON"""
        self.send_response(code)
        self.send_header('Content-Type', 'application/json')
        self.send_header('Access-Control-Allow-Origin', '*')
        self.end_headers()

        response = json.dumps({
            'error': True,
            'code': code,
            'message': message,
            'timestamp': datetime.now().isoformat()
        })
        self.wfile.write(response.encode())

    def proxy_request(self, method: str):
        """Faz proxy da requisição"""
        with self.stats_lock:
            self.stats['requests_total'] += 1

        if not self.check_whitelist():
            return

        # Endpoints especiais de gerenciamento
        if self.path == '/_proxy/status':
            self.handle_status()
            return
        elif self.path == '/_proxy/whitelist':
            self.handle_whitelist_list()
            return
        elif self.path.startswith('/_proxy/'):
            self.send_error_response(404, "Endpoint não encontrado")
            return

        # Extrai URL alvo
        target_url = self.path
        if not target_url.startswith(('http://', 'https://')):
            self.send_error_response(400, "URL deve começar com http:// ou https://")
            return

        try:
            # Prepara headers (remove hop-by-hop headers)
            headers = {}
            hop_by_hop = {'connection', 'keep-alive', 'proxy-authenticate',
                         'proxy-authorization', 'te', 'trailers',
                         'transfer-encoding', 'upgrade', 'host'}

            for key, value in self.headers.items():
                if key.lower() not in hop_by_hop:
                    headers[key] = value

            # Adiciona X-Forwarded-For
            client_ip = self.client_address[0]
            existing_xff = headers.get('X-Forwarded-For', '')
            headers['X-Forwarded-For'] = f"{existing_xff}, {client_ip}".lstrip(', ')

            # Lê body se houver
            content_length = self.headers.get('Content-Length')
            body = None
            if content_length:
                body = self.rfile.read(int(content_length))

            # Faz a requisição
            req = urllib.request.Request(
                target_url,
                data=body,
                headers=headers,
                method=method
            )

            # Configura timeout e SSL
            context = ssl.create_default_context()
            context.check_hostname = False
            context.verify_mode = ssl.CERT_NONE

            with urllib.request.urlopen(req, timeout=30, context=context) as response:
                # Envia resposta
                self.send_response(response.status)

                # Copia headers (exceto hop-by-hop)
                for key, value in response.headers.items():
                    if key.lower() not in hop_by_hop:
                        self.send_header(key, value)

                self.send_header('Access-Control-Allow-Origin', '*')
                self.end_headers()

                # Copia body
                data = response.read()
                self.wfile.write(data)

                with self.stats_lock:
                    self.stats['bytes_transferred'] += len(data)

                logger.info(f"PROXY: {method} {target_url} -> {response.status}")

        except urllib.error.HTTPError as e:
            self.send_response(e.code)
            self.send_header('Content-Type', 'text/plain')
            self.end_headers()
            self.wfile.write(f"Erro upstream: {e.code} {e.reason}".encode())
            logger.error(f"HTTP Error: {target_url} -> {e.code}")

        except urllib.error.URLError as e:
            self.send_error_response(502, f"Erro de conexão: {e.reason}")
            logger.error(f"URL Error: {target_url} -> {e.reason}")

        except Exception as e:
            self.send_error_response(500, f"Erro interno: {str(e)}")
            logger.exception(f"Erro ao fazer proxy: {e}")

    def handle_status(self):
        """Retorna status do proxy"""
        with self.stats_lock:
            uptime = 0
            if self.stats['start_time']:
                uptime = (datetime.now() - self.stats['start_time']).total_seconds()

            status = {
                'status': 'running',
                'uptime_seconds': int(uptime),
                'requests': {
                    'total': self.stats['requests_total'],
                    'allowed': self.stats['requests_allowed'],
                    'blocked': self.stats['requests_blocked']
                },
                'bytes_transferred': self.stats['bytes_transferred'],
                'whitelist_count': len(self.whitelist) if self.whitelist else 0
            }

        self.send_response(200)
        self.send_header('Content-Type', 'application/json')
        self.end_headers()
        self.wfile.write(json.dumps(status, indent=2).encode())

    def handle_whitelist_list(self):
        """Lista whitelist atual"""
        if not self.check_whitelist():
            return

        data = self.whitelist.get_all() if self.whitelist else {}

        self.send_response(200)
        self.send_header('Content-Type', 'application/json')
        self.end_headers()
        self.wfile.write(json.dumps(data, indent=2).encode())

    # Handlers para cada método HTTP
    def do_GET(self):
        self.proxy_request('GET')

    def do_POST(self):
        self.proxy_request('POST')

    def do_PUT(self):
        self.proxy_request('PUT')

    def do_DELETE(self):
        self.proxy_request('DELETE')

    def do_PATCH(self):
        self.proxy_request('PATCH')

    def do_HEAD(self):
        self.proxy_request('HEAD')

    def do_OPTIONS(self):
        """CORS preflight"""
        self.send_response(200)
        self.send_header('Access-Control-Allow-Origin', '*')
        self.send_header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS')
        self.send_header('Access-Control-Allow-Headers', '*')
        self.send_header('Access-Control-Max-Age', '86400')
        self.end_headers()

    def do_CONNECT(self):
        """HTTPS tunneling (CONNECT method)"""
        with self.stats_lock:
            self.stats['requests_total'] += 1

        if not self.check_whitelist():
            return

        # Parse host:port
        try:
            if ':' in self.path:
                host, port = self.path.split(':')
                port = int(port)
            else:
                host = self.path
                port = 443
        except ValueError:
            self.send_error_response(400, "Formato inválido para CONNECT")
            return

        try:
            import socket

            # Conecta ao servidor destino
            remote_socket = socket.create_connection((host, port), timeout=30)

            # Envia 200 Connection Established
            self.send_response(200, 'Connection Established')
            self.end_headers()

            # Faz tunnel bidirecional
            self.connection.setblocking(False)
            remote_socket.setblocking(False)

            import select

            sockets = [self.connection, remote_socket]
            timeout = 60

            while True:
                readable, _, exceptional = select.select(sockets, [], sockets, timeout)

                if exceptional:
                    break

                if not readable:
                    break  # timeout

                for sock in readable:
                    try:
                        data = sock.recv(8192)
                        if not data:
                            raise ConnectionError("Connection closed")

                        if sock is self.connection:
                            remote_socket.sendall(data)
                        else:
                            self.connection.sendall(data)

                        with self.stats_lock:
                            self.stats['bytes_transferred'] += len(data)

                    except (BlockingIOError, ssl.SSLWantReadError):
                        continue
                    except Exception:
                        break

            remote_socket.close()
            logger.info(f"TUNNEL: {host}:{port} closed")

        except Exception as e:
            self.send_error_response(502, f"Erro ao criar tunnel: {e}")
            logger.error(f"CONNECT error: {host}:{port} -> {e}")

class ThreadedHTTPServer(socketserver.ThreadingMixIn, http.server.HTTPServer):
    """HTTP Server com suporte a threads"""
    daemon_threads = True
    allow_reuse_address = True

def main():
    parser = argparse.ArgumentParser(
        description='Proxy HTTP com whitelist de IPs',
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
Exemplos:
    python3 ip-whitelist-proxy.py
    python3 ip-whitelist-proxy.py --port 3128
    python3 ip-whitelist-proxy.py --whitelist /path/to/whitelist.txt
    python3 ip-whitelist-proxy.py --add-ip 203.0.113.50 --add-ip 198.51.100.0/24

Formato do arquivo whitelist (um por linha):
    192.168.1.0/24
    10.0.0.0/8
    100.75.88.8
    # Comentários são ignorados

Uso do proxy:
    curl -x http://localhost:8888 http://example.com
    curl --proxy http://localhost:8888 https://api.example.com/data

Endpoints de gerenciamento:
    http://localhost:8888/_proxy/status     - Status do proxy
    http://localhost:8888/_proxy/whitelist  - Lista whitelist
        """
    )

    parser.add_argument('-p', '--port', type=int, default=DEFAULT_PORT,
                       help=f'Porta do proxy (default: {DEFAULT_PORT})')
    parser.add_argument('-w', '--whitelist', type=str,
                       help='Arquivo com whitelist de IPs')
    parser.add_argument('--add-ip', action='append', dest='extra_ips',
                       help='IPs/subnets adicionais (pode repetir)')
    parser.add_argument('--no-defaults', action='store_true',
                       help='Não carregar whitelist padrão')
    parser.add_argument('-v', '--verbose', action='store_true',
                       help='Modo verbose (debug)')

    args = parser.parse_args()

    if args.verbose:
        logger.setLevel(logging.DEBUG)

    # Inicializa whitelist
    whitelist = IPWhitelist()

    # Carrega defaults
    if not args.no_defaults:
        whitelist.load_from_list(DEFAULT_WHITELIST)
        logger.info(f"Whitelist padrão carregada: {len(DEFAULT_WHITELIST)} entradas")

    # Carrega de arquivo
    if args.whitelist:
        whitelist.load_from_file(args.whitelist)

    # Adiciona IPs extras da linha de comando
    if args.extra_ips:
        for ip in args.extra_ips:
            whitelist.add(ip)

    # Configura handler
    ProxyHandler.whitelist = whitelist
    ProxyHandler.stats['start_time'] = datetime.now()

    # Inicia servidor
    server_address = ('0.0.0.0', args.port)
    httpd = ThreadedHTTPServer(server_address, ProxyHandler)

    print(f"""
╔══════════════════════════════════════════════════════════════╗
║              IP WHITELIST PROXY SERVER                       ║
╠══════════════════════════════════════════════════════════════╣
║  Porta:     {args.port:<48}║
║  Whitelist: {len(whitelist)} IPs/subnets{' ' * (38 - len(str(len(whitelist))))}║
║  Bind:      0.0.0.0 (todas interfaces)                       ║
╠══════════════════════════════════════════════════════════════╣
║  Status:    http://localhost:{args.port}/_proxy/status{' ' * (24 - len(str(args.port)))}║
║  Whitelist: http://localhost:{args.port}/_proxy/whitelist{' ' * (21 - len(str(args.port)))}║
╚══════════════════════════════════════════════════════════════╝

Uso: curl -x http://localhost:{args.port} http://example.com
     curl --proxy http://localhost:{args.port} https://api.example.com

Ctrl+C para parar
""")

    # Mostra whitelist atual
    wl_data = whitelist.get_all()
    if wl_data['single_ips']:
        print(f"IPs únicos: {', '.join(wl_data['single_ips'])}")
    if wl_data['networks']:
        print(f"Subnets:    {', '.join(wl_data['networks'])}")
    print()

    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        print("\n\nEncerrando proxy...")
        httpd.shutdown()

        # Mostra estatísticas finais
        stats = ProxyHandler.stats
        print(f"""
Estatísticas finais:
  Requisições totais:  {stats['requests_total']}
  Permitidas:          {stats['requests_allowed']}
  Bloqueadas:          {stats['requests_blocked']}
  Bytes transferidos:  {stats['bytes_transferred']:,}
""")

if __name__ == '__main__':
    main()


text:
Perfect! I've analyzed the proxy server. Here's a comprehensive breakdown of the API structure and suggestions for real-time monitoring:

## Current API Structure

### 1. Status Endpoint: `/_proxy/status`

**Response JSON Structure:**
```json
{
  "status": "running",
  "uptime_seconds": 3600,
  "requests": {
    "total": 150,
    "allowed": 145,
    "blocked": 5
  },
  "bytes_transferred": 5242880,
  "whitelist_count": 8
}
```

**Metrics Tracked:**
- `uptime_seconds` - Seconds since server start
- `requests.total` - All requests attempted
- `requests.allowed` - Whitelisted client requests
- `requests.blocked` - Blocked (non-whitelisted) requests
- `bytes_transferred` - Total data proxied through (all methods: GET, POST, PUT, DELETE, PATCH, HEAD, CONNECT)
- `whitelist_count` - Number of IPs/subnets in whitelist

### 2. Whitelist Endpoint: `/_proxy/whitelist`

**Response JSON Structure:**
```json
{
  "single_ips": ["127.0.0.1", "::1", "100.75.88.8"],
  "networks": ["192.168.1.0/24", "10.0.0.0/8", "100.64.0.0/10"],
  "total": 6
}
```

**Data Exposed:**
- Individual IPs in whitelist
- CIDR subnet ranges
- Total count of entries

---

## Suggestions for Real-Time WebSocket Monitoring (iOS App Integration)

### Architecture: WebSocket Event Stream

**Proposed New Endpoint:** `/_proxy/stream` (WebSocket)

#### 1. **Event Types to Stream**

```python
# Connection established
{
  "type": "connected",
  "timestamp": "2024-12-26T15:30:45.123Z",
  "server_id": "proxy-1"
}

# Request event (all requests, before whitelist check)
{
  "type": "request",
  "timestamp": "2024-12-26T15:30:46.234Z",
  "method": "GET",
  "client_ip": "192.168.1.100",
  "target_url": "https://api.example.com/data",
  "status": "allowed",  # "allowed", "blocked", "error"
  "http_status": 200,   # null if blocked
  "bytes": 1024,
  "latency_ms": 245,
  "user_agent": "Mozilla/5.0..."
}

# Blocked request
{
  "type": "request",
  "timestamp": "2024-12-26T15:30:47.456Z",
  "client_ip": "203.0.113.50",
  "target_url": null,
  "status": "blocked",
  "reason": "IP not in whitelist",
  "http_status": 403
}

# Stats update (periodic)
{
  "type": "stats",
  "timestamp": "2024-12-26T15:30:50.000Z",
  "uptime_seconds": 3605,
  "requests": {
    "total": 152,
    "allowed": 147,
    "blocked": 5
  },
  "bytes_transferred": 5300000,
  "requests_per_minute": 3.2,
  "avg_latency_ms": 250,
  "top_clients": [
    {"ip": "192.168.1.100", "requests": 45},
    {"ip": "192.168.1.200", "requests": 32}
  ]
}

# Whitelist change
{
  "type": "whitelist_change",
  "timestamp": "2024-12-26T15:31:00.000Z",
  "action": "add",  # "add", "remove"
  "target": "203.0.113.100",
  "total_count": 9
}

# Alert (threshold exceeded)
{
  "type": "alert",
  "timestamp": "2024-12-26T15:31:05.000Z",
  "severity": "warning",  # "info", "warning", "error"
  "message": "High blocking rate detected",
  "details": {
    "blocked_rate": 0.15,  # 15% of requests
    "blocked_per_minute": 5,
    "top_blocked_ip": "203.0.113.50"
  }
}
```

#### 2. **Implementation Strategy for Extended Proxy**

**Add to ProxyHandler class:**

```python
# Track per-request metrics
request_history = []  # Circular buffer of last 1000 requests
top_clients_cache = {}  # {ip: request_count}
websocket_clients = set()  # Active WebSocket connections

# Methods to add:
def record_request(self, client_ip, method, url, status, http_code, bytes_tx, latency):
    event = {
        "type": "request",
        "timestamp": datetime.now().isoformat(),
        "method": method,
        "client_ip": client_ip,
        "target_url": url,
        "status": status,
        "http_status": http_code,
        "bytes": bytes_tx,
        "latency_ms": latency
    }
    request_history.append(event)
    if len(request_history) > 1000:
        request_history.pop(0)
    broadcast_to_websockets(event)

def get_request_history(self, limit=100, client_ip=None):
    # Filter request history

def calculate_stats_extended(self):
    # Calculate rolling metrics: req/min, avg latency, top clients
```

#### 3. **iOS App Integration Points**

**What the iOS app could display:**

1. **Live Dashboard**
   - Real-time request counter (updating as events arrive)
   - Allowed vs. Blocked gauge
   - Request rate (req/min)
   - Average latency sparkline
   - Bytes transferred (total and rate)

2. **Request Log Stream**
   - Scrollable list of recent requests
   - Color coding: green (allowed), red (blocked)
   - Filter by IP, method, status
   - Search by domain

3. **Alerts Panel**
   - High blocking rate threshold
   - Specific IPs being heavily blocked
   - High latency detection
   - Whitelist changes

4. **Analytics View**
   - Top client IPs (bar chart)
   - Request methods distribution (pie chart)
   - Latency histogram
   - Hourly traffic trends

#### 4. **WebSocket Handler Pseudocode**

```python
def do_WEBSOCKET(self):
    """Upgrade to WebSocket on /_proxy/stream"""
    if self.path != '/_proxy/stream':
        self.send_error_response(404, "Not found")
        return

    if not self.check_whitelist():
        return

    # Use websockets library to upgrade connection
    try:
        ws = upgrade_connection(self)
        websocket_clients.add(ws)

        # Send initial state
        ws.send(json.dumps({
            "type": "connected",
            "stats": get_current_stats()
        }))

        # Keep connection alive, send periodic stats
        while ws.connected:
            time.sleep(5)
            ws.send(json.dumps({
                "type": "stats",
                "data": calculate_stats_extended()
            }))
    finally:
        websocket_clients.discard(ws)
```

#### 5. **Performance Considerations**

- **Circular buffer** for request history (avoid unbounded memory growth)
- **Periodic stats** updates (every 5-10 seconds) instead of per-request
- **Configurable detail level** - lite mode (stats only) vs verbose (all requests)
- **Client IP aggregation** - group requests by IP to reduce message volume
- **Backpressure handling** - slow WebSocket clients don't block proxy requests

---

## Summary

The proxy currently exposes minimal metrics via two REST endpoints. To support real-time iOS monitoring, add:

1. **WebSocket endpoint** (`/_proxy/stream`) for live events
2. **Per-request tracking** with latency, bytes, and method info
3. **Aggregate metrics** - request rate, avg latency, top clients
4. **Alert system** for threshold violations
5. **Request history buffer** for detailed analytics

This would provide a complete monitoring solution for iOS apps to track proxy health and security in real-time.