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Tiny HTTP Proxy. Usuage: python TinyHTTPProxy.py -p 11028
#!/usr/bin/python
__doc__ = """Tiny HTTP Proxy.
This module implements GET, HEAD, POST, PUT and DELETE methods
on BaseHTTPServer, and behaves as an HTTP proxy. The CONNECT
method is also implemented experimentally, but has not been
tested yet.
Any help will be greatly appreciated. SUZUKI Hisao
2009/11/23 - Modified by Mitko Haralanov
* Added very simple FTP file retrieval
* Added custom logging methods
* Added code to make this a standalone application
"""
__version__ = "0.3.1"
import BaseHTTPServer, select, socket, SocketServer, urlparse
import logging
import logging.handlers
import getopt
import sys
import os
import signal
import threading
from types import FrameType, CodeType
from time import sleep
import ftplib
DEFAULT_LOG_FILENAME = "proxy.log"
class ProxyHandler (BaseHTTPServer.BaseHTTPRequestHandler):
__base = BaseHTTPServer.BaseHTTPRequestHandler
__base_handle = __base.handle
server_version = "TinyHTTPProxy/" + __version__
rbufsize = 0 # self.rfile Be unbuffered
def handle(self):
(ip, port) = self.client_address
self.server.logger.log (logging.INFO, "Request from '%s'", ip)
if hasattr(self, 'allowed_clients') and ip not in self.allowed_clients:
self.raw_requestline = self.rfile.readline()
if self.parse_request(): self.send_error(403)
else:
self.__base_handle()
def _connect_to(self, netloc, soc):
i = netloc.find(':')
if i >= 0:
host_port = netloc[:i], int(netloc[i+1:])
else:
host_port = netloc, 80
self.server.logger.log (logging.INFO, "connect to %s:%d", host_port[0], host_port[1])
try: soc.connect(host_port)
except socket.error, arg:
try: msg = arg[1]
except: msg = arg
self.send_error(404, msg)
return 0
return 1
def do_CONNECT(self):
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
if self._connect_to(self.path, soc):
self.log_request(200)
self.wfile.write(self.protocol_version +
" 200 Connection established\r\n")
self.wfile.write("Proxy-agent: %s\r\n" % self.version_string())
self.wfile.write("\r\n")
self._read_write(soc, 300)
finally:
soc.close()
self.connection.close()
def do_GET(self):
(scm, netloc, path, params, query, fragment) = urlparse.urlparse(
self.path, 'http')
if scm not in ('http', 'ftp') or fragment or not netloc:
self.send_error(400, "bad url %s" % self.path)
return
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
if scm == 'http':
if self._connect_to(netloc, soc):
self.log_request()
soc.send("%s %s %s\r\n" % (self.command,
urlparse.urlunparse(('', '', path,
params, query,
'')),
self.request_version))
self.headers['Connection'] = 'close'
del self.headers['Proxy-Connection']
for key_val in self.headers.items():
soc.send("%s: %s\r\n" % key_val)
soc.send("\r\n")
self._read_write(soc)
elif scm == 'ftp':
# fish out user and password information
i = netloc.find ('@')
if i >= 0:
login_info, netloc = netloc[:i], netloc[i+1:]
try: user, passwd = login_info.split (':', 1)
except ValueError: user, passwd = "anonymous", None
else: user, passwd ="anonymous", None
self.log_request ()
try:
ftp = ftplib.FTP (netloc)
ftp.login (user, passwd)
if self.command == "GET":
ftp.retrbinary ("RETR %s"%path, self.connection.send)
ftp.quit ()
except Exception, e:
self.server.logger.log (logging.WARNING, "FTP Exception: %s",
e)
finally:
soc.close()
self.connection.close()
def _read_write(self, soc, max_idling=20, local=False):
iw = [self.connection, soc]
local_data = ""
ow = []
count = 0
while 1:
count += 1
(ins, _, exs) = select.select(iw, ow, iw, 1)
if exs: break
if ins:
for i in ins:
if i is soc: out = self.connection
else: out = soc
data = i.recv(8192)
if data:
if local: local_data += data
else: out.send(data)
count = 0
if count == max_idling: break
if local: return local_data
return None
do_HEAD = do_GET
do_POST = do_GET
do_PUT = do_GET
do_DELETE=do_GET
def log_message (self, format, *args):
self.server.logger.log (logging.INFO, "%s %s", self.address_string (),
format % args)
def log_error (self, format, *args):
self.server.logger.log (logging.ERROR, "%s %s", self.address_string (),
format % args)
class ThreadingHTTPServer (SocketServer.ThreadingMixIn,
BaseHTTPServer.HTTPServer):
def __init__ (self, server_address, RequestHandlerClass, logger=None):
BaseHTTPServer.HTTPServer.__init__ (self, server_address,
RequestHandlerClass)
self.logger = logger
def logSetup (filename, log_size, daemon):
logger = logging.getLogger ("TinyHTTPProxy")
logger.setLevel (logging.INFO)
if not filename:
if not daemon:
# display to the screen
handler = logging.StreamHandler ()
else:
handler = logging.handlers.RotatingFileHandler (DEFAULT_LOG_FILENAME,
maxBytes=(log_size*(1<<20)),
backupCount=5)
else:
handler = logging.handlers.RotatingFileHandler (filename,
maxBytes=(log_size*(1<<20)),
backupCount=5)
fmt = logging.Formatter ("[%(asctime)-12s.%(msecs)03d] "
"%(levelname)-8s {%(name)s %(threadName)s}"
" %(message)s",
"%Y-%m-%d %H:%M:%S")
handler.setFormatter (fmt)
logger.addHandler (handler)
return logger
def usage (msg=None):
if msg: print msg
print sys.argv[0], "[-p port] [-l logfile] [-dh] [allowed_client_name ...]]"
print
print " -p - Port to bind to"
print " -l - Path to logfile. If not specified, STDOUT is used"
print " -d - Run in the background"
print
def handler (signo, frame):
while frame and isinstance (frame, FrameType):
if frame.f_code and isinstance (frame.f_code, CodeType):
if "run_event" in frame.f_code.co_varnames:
frame.f_locals["run_event"].set ()
return
frame = frame.f_back
def daemonize (logger):
class DevNull (object):
def __init__ (self): self.fd = os.open ("/dev/null", os.O_WRONLY)
def write (self, *args, **kwargs): return 0
def read (self, *args, **kwargs): return 0
def fileno (self): return self.fd
def close (self): os.close (self.fd)
class ErrorLog:
def __init__ (self, obj): self.obj = obj
def write (self, string): self.obj.log (logging.ERROR, string)
def read (self, *args, **kwargs): return 0
def close (self): pass
if os.fork () != 0:
## allow the child pid to instanciate the server
## class
sleep (1)
sys.exit (0)
os.setsid ()
fd = os.open ('/dev/null', os.O_RDONLY)
if fd != 0:
os.dup2 (fd, 0)
os.close (fd)
null = DevNull ()
log = ErrorLog (logger)
sys.stdout = null
sys.stderr = log
sys.stdin = null
fd = os.open ('/dev/null', os.O_WRONLY)
#if fd != 1: os.dup2 (fd, 1)
os.dup2 (sys.stdout.fileno (), 1)
if fd != 2: os.dup2 (fd, 2)
if fd not in (1, 2): os.close (fd)
def main ():
logfile = None
daemon = False
max_log_size = 20
port = 8000
allowed = []
run_event = threading.Event ()
local_hostname = socket.gethostname ()
try: opts, args = getopt.getopt (sys.argv[1:], "l:dhp:", [])
except getopt.GetoptError, e:
usage (str (e))
return 1
for opt, value in opts:
if opt == "-p": port = int (value)
if opt == "-l": logfile = value
if opt == "-d": daemon = not daemon
if opt == "-h":
usage ()
return 0
# setup the log file
logger = logSetup (logfile, max_log_size, daemon)
if daemon:
daemonize (logger)
signal.signal (signal.SIGINT, handler)
if args:
allowed = []
for name in args:
client = socket.gethostbyname(name)
allowed.append(client)
logger.log (logging.INFO, "Accept: %s (%s)" % (client, name))
ProxyHandler.allowed_clients = allowed
else:
logger.log (logging.INFO, "Any clients will be served...")
server_address = (socket.gethostbyname (local_hostname), port)
ProxyHandler.protocol = "HTTP/1.0"
httpd = ThreadingHTTPServer (server_address, ProxyHandler, logger)
sa = httpd.socket.getsockname ()
print "Servering HTTP on", sa[0], "port", sa[1]
req_count = 0
while not run_event.isSet ():
try:
httpd.handle_request ()
req_count += 1
if req_count == 1000:
logger.log (logging.INFO, "Number of active threads: %s",
threading.activeCount ())
req_count = 0
except select.error, e:
if e[0] == 4 and run_event.isSet (): pass
else:
logger.log (logging.CRITICAL, "Errno: %d - %s", e[0], e[1])
logger.log (logging.INFO, "Server shutdown")
return 0
if __name__ == '__main__':
sys.exit (main ())
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