116 lines
4.5 KiB
Python
Executable File
116 lines
4.5 KiB
Python
Executable File
from signal import SIGUSR1
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from secrets import token_urlsafe
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import subprocess, re, os
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#c++ -o proxy proxy.cpp
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class Filter:
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def __init__(self, regex, is_case_sensitive=True, is_blacklist=True, c_to_s=False, s_to_c=False, blocked_packets=0, code=None):
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self.regex = regex
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self.is_case_sensitive = is_case_sensitive
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self.is_blacklist = is_blacklist
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if c_to_s == s_to_c: c_to_s = s_to_c = True # (False, False) == (True, True)
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self.c_to_s = c_to_s
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self.s_to_c = s_to_c
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self.blocked = blocked_packets
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self.code = code
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def compile(self):
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if isinstance(self.regex, str): self.regex = self.regex.encode()
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if not isinstance(self.regex, bytes): raise Exception("Invalid Regex Paramether")
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re.compile(self.regex) # raise re.error if is invalid!
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case_sensitive = "1" if self.is_case_sensitive else "0"
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if self.c_to_s:
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yield case_sensitive + "C" + self.regex.hex() if self.is_blacklist else case_sensitive + "c"+ self.regex.hex()
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if self.s_to_c:
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yield case_sensitive + "S" + self.regex.hex() if self.is_blacklist else case_sensitive + "s"+ self.regex.hex()
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class Proxy:
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def __init__(self, internal_port, public_port, callback_blocked_update=None, filters=None, public_host="0.0.0.0", internal_host="127.0.0.1"):
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self.public_host = public_host
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self.public_port = public_port
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self.internal_host = internal_host
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self.internal_port = internal_port
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self.filters = set(filters) if filters else set([])
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self.process = None
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self.callback_blocked_update = callback_blocked_update
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self.config_file_path = None
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while self.config_file_path is None:
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config_file_path = os.path.join("/tmp/" + token_urlsafe(16))
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if not os.path.exists(config_file_path):
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self.config_file_path = config_file_path
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def start(self, in_pause=False):
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if self.process is None:
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filter_map = self.compile_filters()
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filters_codes = list(filter_map.keys()) if not in_pause else []
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proxy_binary_path = os.path.join(os.path.dirname(os.path.abspath(__file__)),"./proxy")
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self.__write_config(filters_codes)
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self.process = subprocess.Popen(
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[proxy_binary_path, str(self.public_host), str(self.public_port), str(self.internal_host), str(self.internal_port), self.config_file_path],
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stdout=subprocess.PIPE, universal_newlines=True
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)
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for stdout_line in iter(self.process.stdout.readline, ""):
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if stdout_line.startswith("BLOCKED"):
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regex_id = stdout_line.split()[1]
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filter_map[regex_id].blocked+=1
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if self.callback_blocked_update: self.callback_blocked_update(filter_map[regex_id])
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self.process.stdout.close()
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return self.process.wait()
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def stop(self):
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if self.process:
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self.process.terminate()
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try:
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self.process.wait(timeout=3)
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return True
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except Exception:
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self.process.kill()
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return False
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finally:
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self.process = None
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return True
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def restart(self, in_pause=False):
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status = self.stop()
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self.start(in_pause=in_pause)
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return status
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def __write_config(self, filters_codes):
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with open(self.config_file_path,'w') as config_file:
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for line in filters_codes:
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config_file.write(line + '\n')
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def reload(self):
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if self.isactive():
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filter_map = self.compile_filters()
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filters_codes = list(filter_map.keys())
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self.__write_config(filters_codes)
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self.trigger_reload_config()
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def isactive(self):
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return True if self.process else False
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def trigger_reload_config(self):
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self.process.send_signal(SIGUSR1)
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def pause(self):
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if self.isactive():
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self.__write_config([])
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self.trigger_reload_config()
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else:
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self.start(in_pause=True)
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def compile_filters(self):
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res = {}
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for filter_obj in self.filters:
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try:
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raw_filters = filter_obj.compile()
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for filter in raw_filters:
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res[filter] = filter_obj
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except Exception: pass
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return res
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