PyProxy/PyProxy.py at master · OffensivePython/PyProxy · GitHub

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#!/usr/bin/env python
#=========================================================#
# [+] Title: Simple Asynchronous HTTP Proxy #
# [+] Script: pyproxy.py #
# [+] Website: http://www.pythonforpentesting.com #
# [+] Twitter: @OffensivePython #
#=========================================================#

importsocket
importselect
importsys
importre

server=socket.socket()
internal= [] # Internal connections (browser)
pipe= {} # dst_socket:src_socket

# CONSTANTS
MAXSIZE=65535
# Unresolved/HTTPS domain
error_header= (
b"HTTP/1.1 404 Not Found\r\n"
b"Connection: Close\r\n\r\n"
 )
# Usage
usage= (
"usage: pyproxy.py port\r\n"
"Port should be in range 0-65535\r\n"
"e.g: pyproxy.py 8080"
 )

defrecvall(sock):
data=b""
whileTrue:
r, w, e=select.select([sock], [], [], 0.5)
ifr:
chunk=sock.recv(MAXSIZE)
ifchunk:
data+=chunk
else:
break
else:
break
returndata

defaccept_connection(sock):
connection, address=sock.accept()
internal.append(connection)

defget_request_info(request):
method=re.match(b"([A-Z]+?) ", request)
ifmethod:
req=re.match(b"(.*?)\r\n", request).group(1).decode()
method=method.group(1).decode()
ifmethod=="CONNECT":
address=re.search(b"CONNECT (.*?):(.*?) HTTP", request)
host, port=address.group(1).decode(), int(address.group(2).decode())
else:
host=re.search(b"Host: (.*?)\r\n", request).group(1).decode()
port=80
try:
host=socket.gethostbyname(host)
exceptsocket.gaierror:
host="UNRESOLVED"
else:
method=None
host=None
port=None
returnmethod, host, port, req


defconnecto(host, port):
sock=socket.socket()
try:
sock.connect((host, port))
exceptsocket.error:
sock.close()
sock=None
returnsock

defforward_requests(socklist):
r, w, e=select.select(socklist, [], socklist)
forsrcinr:
ifsrc==server:
accept_connection(src)
else:
request=recvall(src)
ifrequest:
method, host, port, req=get_request_info(request)
ifhost=="UNRESOLVED"ormethod=="CONNECT":
src.send(error_header)
internal.remove(src)
src.close()
elifhost:
print("[+]", req)
dst=connecto(host, port)
dst.send(request)
pipe[dst] =src
else:
internal.remove(src)
fordstinpipe:
ifpipe[dst]==src:
delpipe[dst]
dst.close()
break
src.close()

defforward_responses(socklist):
ifsocklist:
r, w, e=select.select(socklist, [], [], 1)
fordstinr:
src=pipe[dst]
response=recvall(dst)
ifresponse:
src.send(response)
internal.remove(src)
delpipe[dst]
src.close()
dst.close()

defcleanup():
forcininternal:
c.close()
forpinpipe:
p.close()

defmain():
args=sys.argv
iflen(args)==2:
try:
port=int(args[1])
ifport>MAXSIZE:
raiseValueError("Port should be in range(65535)")
exceptValueErroraserr:
print(err)
sys.exit()
else:
print(usage)
sys.exit()
print("[+] PyProxy Listening on port %d"%port)
server.bind(("", port))
server.listen(5)
internal.append(server)
try:
whileTrue:
forward_requests(internal)
forward_responses(list(pipe.keys()))
exceptKeyboardInterrupt:
print("[+] Exiting")
cleanup()
sys.exit()

if__name__=="__main__":
main()