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|
import socket
import threading
from urllib.parse import parse_qs, urlparse
from flask import Flask, request,render_template
import unicodedata
BLACKLIST_KEYWORDS = [
'write', 'eval', 'assert', 'read', 'exec', 'apply', 'locals', 'load_module', 'json.loads', 'urllib.request.urlopen', 'subprocess', 'threading', 'tempfile', 'run', 'yield', 'inspect', 'netrc', 'globals', 'os', 'urandom', 'register', 'breakpoint', 'environ', 'str.format_map', 'tarfile', 'traceback', 'open', 'listen', 'info_leak', 'vars', 'exec_hook',
'__import__', 'exec', 'eval', 'compile', 'open', 'input', 'raw_input', 'getattr', 'setattr', 'delattr', 'hasattr', 'globals', 'locals', 'vars', 'dir', 'help', 'license', 'copyright', 'credits', 'exit', 'quit', 'breakpoint', 'os', 'sys', 'subprocess', 'commands', 'popen', 'popen2', 'popen3', 'popen4', 'system',
'popen', 'spawn', 'fork', 'execve', 'execl', 'execle', 'execlp', 'execlpe', 'execv', 'execve', 'execvp', 'execvpe', 'startfile', 'remove', 'unlink', 'rmdir', 'mkdir', 'chdir', 'chmod', 'chown', 'rename', 'replace', 'walk', 'listdir', 'stat', 'fstat', 'lstat', 'getenv', 'putenv', 'environ', 'system',
'urandom', 'socket', 'urllib', 'urllib2', 'requests', 'http', 'ftplib', 'smtplib', 'socketserver', 'http.server', 'xmlrpc', 'jsonrpc', 'pickle', 'marshal', 'load', 'loads', 'dump', 'dumps', 'class', 'base', 'mro', '__subclasses__', '__dict__', '__globals__',
'__builtins__', '__getattribute__', '__getattr__', '__setattr__', '__delattr__', '__code__', '__closure__', '__func__', '__self__', '__module__', '__name__', '__qualname__', '__file__', '__loader__', '__spec__', '__package__', '__doc__', '__annotations__', '__kwdefaults__',
'__defaults__', '()', '[]', '{}', '.', 'lambda', 'yield', 'from', 'import', 'True.__class__', '"".__class__', '0.__class__', '().__class__', '[].__class__', '{}.__class__', 'pathlib', 'shutil', 'tempfile', 'glob', 'zipfile', 'tarfile', 'inspect', 'dis', 'types', 'imp',
'importlib', 'pkgutil', 'site', 'builtins', '__builtin__', 'main', '__main__', 'chr', 'ord', 'hex', 'oct', 'bin', 'repr', 'ascii', 'eval', 'exec', 'compile', 'memoryview', 'bytearray', 'bytes', 'str', 'int', 'float', '().__class__.__base__', '().__class__.__mro__',
'().__class__.__subclasses__', '().__class__.__init__', '().__class__.__dict__', '().__class__.__getattribute__', '().__class__.__bases__[0].__subclasses__()', 'del', 'global', 'nonlocal', 'assert', 'with', 'as', 'try', 'except', 'finally', 'raise', 'import', 'from', 'while', 'for', 'if',
'else', 'elif', 'def', 'class', 'return', 'yield', 'await', 'async', 'print', 'format', 'input', 'id', 'type', 'isinstance', 'issubclass', 'pickle.loads', 'marshal.loads', 'yaml.load', 'json.loads', 'evaljs', 'execjs', 'shell', 'run', 'call', 'check_output', 'Popen',
'check_call', 'getoutput', 'getstatusoutput', "url","config","read","sub","get",'\\x', '\\u', '\\U', '\\N', '\\', 'encode', 'decode', 'replace', 'join', 'split', 'format', 'translate', 'maketrans', 'getattr(', 'vars(', 'locals(', 'globals(', 'dir(', 'eval(', 'exec(', 'compile(', 'open(', '__import__(',
'().__', '"".__', '0.__', '().__class__(', '[].__class__(', '{}.__class__(', '_', '{', '}', '[', ']', '(', ')', '=', '<', '>', ':', ';', ',', '"', "'", '\\', '|', '`', '~', '!', '@', '#', '$', '%', '^', '&', '?',
'\n', '\r', '\t', '\f', '\v', '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07', '\x08', '\x0b', '\x0c', '\x0e', '\x0f', '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f',
'\u200b', '\u200c', '\u200d', '\u200e', '\u200f', '\u202a', '\u202b', '\u202c', '\u202d', '\u202e', '\u2060', '\u2061', '\u2062', '\u2063', '\u2064', '\ufeff', '\\x', '\\u', '\\U', '\\N{', '0x', '0o', '0b', '%', 'f"', "f'", 'b"', "b'", 'r"', "r'", ' ', '.', '__',
'#', '--', '/*', '*/', '//', ';--', ';#', '\\v', '\\t', '\\r', '\\n', '\\b', '\\a', '\\f','ev', 'ex', 'ch', 'ge', 'b6', 'un', 'co', '__b', '__g', '__s', '__d', '__m', '__c'
]
def to_halfwidth(s): //全角字符规范化：防止全角绕过
s = unicodedata.normalize('NFKC', s)
result = []
for char in s:
code = ord(char)
if 0xFF21 <= code <= 0xFF3A:
result.append(chr(code - 0xFF21 + 0x41))
elif 0xFF41 <= code <= 0xFF5A:
result.append(chr(code - 0xFF41 + 0x61))
elif 0xFF10 <= code <= 0xFF19:
result.append(chr(code - 0xFF10 + 0x30))
elif code in {0xFF08, 0xFF5F}:
result.append('(')
elif code in {0xFF09, 0xFF60}:
result.append(')')
elif code == 0xFF3B:
result.append('[')
elif code == 0xFF3D:
result.append(']')
elif code == 0xFF5B:
result.append('{')
elif code == 0xFF5D:
result.append('}')
elif code == 0xFF01:
result.append('!')
elif code == 0xFF0C:
result.append(',')
elif code == 0xFF1B:
result.append(';')
elif code == 0xFF1A:
result.append(':')
elif code in {0x3002, 0xFF0E}:
result.append('.')
elif code == 0xFF1F:
result.append('?')
elif code == 0xFF0F:
result.append('/')
elif code == 0xFF02:
result.append('"')
elif code == 0xFF07:
result.append("'")
else:
result.append(char)
return ''.join(result)
def parse_headers(headers):
header_dict = {}
for line in headers:
if ':' in line:
key, value = line.split(':', 1)
header_dict[key.strip().lower()] = value.strip()
return header_dict
def check_params_for_secret(params):
for key, values in params.items():
for value in values:
value_normalized = to_halfwidth(value).lower()
for keyword in BLACKLIST_KEYWORDS:
if keyword in value_normalized:
return True
return False
def handle_client(client_socket):
TIMEOUT_SECONDS = 5
try:
client_socket.settimeout(TIMEOUT_SECONDS)
request_data = b""
header_end_idx = -1
while header_end_idx == -1:
chunk = client_socket.recv(4096)
if not chunk:
client_socket.close()
return
request_data += chunk
header_end_idx = request_data.find(b'\r\n\r\n')
try:
header_end_idx = request_data.find(b'\r\n\r\n')
if header_end_idx == -1:
raise ValueError("Malformed request")
header_bytes = request_data[:header_end_idx]
headers_raw = header_bytes.decode('utf-8', errors='ignore').split('\r\n')
request_line = headers_raw[0]
method, path, version = request_line.split(maxsplit=2)
except Exception:
client_socket.close()
return
headers = parse_headers(headers_raw[1:])
url_parts = urlparse(path)
query_params = parse_qs(url_parts.query)
has_secret = check_params_for_secret(query_params)
if method.upper() == 'POST':
content_length = int(headers.get('content-length', '0'))
transfer_encoding = headers.get('transfer-encoding', '').lower().strip()
body_start = header_end_idx + 4
body_data = request_data[body_start:] if len(request_data) > body_start else b''
if transfer_encoding:
body_buffer = b""
remaining_data = body_data
while True:
if b'\r\n' not in remaining_data:
more = client_socket.recv(4096)
if not more:
break
remaining_data += more
continue
size_line, rest = remaining_data.split(b'\r\n', 1)
try:
chunk_size = int(size_line.strip(), 16)
except ValueError:
break
if chunk_size == 0:
if rest.startswith(b'\r\n'):
break
else:
while len(rest) < 2:
more = client_socket.recv(4096)
if not more:
break
rest += more
if rest.startswith(b'\r\n'):
break
else:
break
needed = chunk_size + 2
while len(rest) < needed:
more = client_socket.recv(min(4096, needed - len(rest)))
if not more:
break
rest += more
chunk_data = rest[:chunk_size]
body_buffer += chunk_data
remaining_data = rest[chunk_size + 2:]
body_str = body_buffer.decode('utf-8', errors='ignore')
post_params = parse_qs(body_str)
has_secret = has_secret or check_params_for_secret(post_params)
elif content_length > 0:
while len(body_data) < content_length:
chunk = client_socket.recv(min(4096, content_length - len(body_data)))
if not chunk:
break
body_data += chunk
try:
body_str = body_data.decode('utf-8', errors='ignore')
post_params = parse_qs(body_str)
has_secret = has_secret or check_params_for_secret(post_params)
except Exception:
pass
if has_secret:
response = (
"HTTP/1.1 403 Forbidden\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n"
"\r\n"
"We are all just trying our best to live"
)
client_socket.send(response.encode())
client_socket.close()
return
try:
backend_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
backend_socket.settimeout(TIMEOUT_SECONDS)
backend_socket.connect(('localhost', 3001)) # 连接到Flask后端
backend_socket.sendall(request_data) # 转发原始请求
while True:
response_chunk = backend_socket.recv(4096)
if not response_chunk:
break
client_socket.sendall(response_chunk)
backend_socket.close()
except socket.timeout:
response = (
"HTTP/1.1 504 Gateway Timeout\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n"
"\r\n"
"Did not respond in time"
)
client_socket.send(response.encode())
client_socket.close()
return
except Exception:
pass
client_socket.close()
except socket.timeout:
try:
response = (
"HTTP/1.1 408 Request Timeout\r\n"
"Content-Type: text/plain\r\n"
"Connection: close\r\n"
"\r\n"
"timeout"
)
client_socket.send(response.encode())
except:
pass
finally:
client_socket.close()
return
except Exception:
try:
client_socket.close()
except:
pass
def start_flask_server():
app = Flask(__name__)
@app.route('/calc', methods=['POST'])
def index():
try:
exp = request.form.get('calc')
if(exp!=None):
result = eval(exp)
return str(result)
else:
return "no num to calc"
except:
return "I'm just a calc, I could not process this"
@app.route('/', methods=['GET'])
def home():
return render_template('index.html')
import logging
log = logging.getLogger('werkzeug')
log.setLevel(logging.ERROR)
app.run(host='127.0.0.1', port=3001, debug=False)
def main():
flask_thread = threading.Thread(target=start_flask_server, daemon=True)
flask_thread.start()
import time
time.sleep(1)
proxy_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
proxy_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
proxy_socket.bind(('0.0.0.0', 8000))
proxy_socket.listen(5)
while True:
client_socket, addr = proxy_socket.accept()
client_handler = threading.Thread(target=handle_client, args=(client_socket,))
client_handler.start()
if __name__ == "__main__":
main()
|
得到5a:fa:fe:00:f9:bd，去掉冒号转10进制，得到100034049800637
