#!/usr/bin/python """ Copyright (c) 2001 SUZUKI Hisao Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ __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 """ __version__ = "0.2.1" import BaseHTTPServer, select, socket, SocketServer, urlparse, re, string, os, sys class ProxyHandler (BaseHTTPServer.BaseHTTPRequestHandler): __base = BaseHTTPServer.BaseHTTPRequestHandler __base_handle = __base.handle server_version = "TinyHTTPProxy/" + __version__ rbufsize = 0 # self.rfile Be unbuffered host_port = () def handle(self): (ip, port) = self.client_address 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(':') to_replace = "" if i >= 0: self.host_port = netloc[:i], int(netloc[i+1:]) if (re.match("(\w+\.)*gnunet$", self.host_port[0])): print 'calling gnunet-gns -a '+netloc[:i] auth = os.popen("gnunet-gns -a "+netloc[:i]) lines = auth.readlines() if (len(lines) > 0): print 'result: '+lines[0].split(" ")[-1].rstrip() to_replace = lines[0].split(" ")[-1].rstrip() else: to_replace = "+" else: self.host_port = netloc, 80 if (re.match("(\w+\.)*gnunet$", self.host_port[0])): print 'calling gnunet-gns -a '+netloc auth = os.popen("gnunet-gns -a "+netloc) lines = auth.readlines() if (len(lines) > 0): print 'result: '+lines[0].split(" ")[-1].rstrip() to_replace = lines[0].split(" ")[-1].rstrip() else: to_replace = "+" print "\t" "connect to %s:%d" % self.host_port try: soc.connect(self.host_port) except socket.error, arg: try: msg = arg[1] except: msg = arg self.send_error(404, msg) return (0, 0) return (1, to_replace) def do_CONNECT(self): soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: res, to_repl = self._connect_to(self.path, soc) if res: 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, to_repl, 300) finally: print "\t" "bye" soc.close() self.connection.close() def test_re2(self, mo): short = os.popen("gnunet-gns -s"+string.replace(mo.group(1), 'a href="http://', "")) lines = short.readlines() if (len(lines) < 1): return mo.group(1) elif (len(lines[0].split(" ")) > 0): return 'a href="http://'+lines[0].split(" ")[-1].rstrip() else: return mo.group(1) def shorten_zkey(self): return lambda mo: self.test_re2(mo) #return lambda mo: 'a href="http://'+os.popen("gnunet-gns -s"+string.replace(mo.group(1), 'a href="http://', "")).readlines()[0].split(" ")[-1].rstrip() def test_re(self, to_repl, mo): short = os.popen("gnunet-gns -s "+string.replace(mo.group(1)+to_repl, 'a href="http://', "")) lines = short.readlines() if (len(lines) < 1): return to_repl elif (len(lines[0].split(" ")) > 0): return 'a href="http://'+lines[0].split(" ")[-1].rstrip() else: return to_repl def replace_and_shorten(self, to_repl): return lambda mo: self.test_re(to_repl, mo) # return lambda mo: 'a href="http://'+os.popen("gnunet-gns -s "+string.replace(mo.group(1)+to_repl, 'a href="http://', "")).readlines()[0].split(" ")[-1].rstrip() #full = string.replace(mo.group(1)+to_repl, 'a href="http://', "") #print 'calling gnunet-gns -s '+full #s = os.popen("gnunet-gns -s "+full) #lines = s.readlines() #print 'short: '+lines[0].split(" ")[-1].rstrip() #return 'a href="'+lines[0].split(" ")[-1].rstrip() def do_GET(self): (scm, netloc, path, params, query, fragment) = urlparse.urlparse( self.path, 'http') if scm != 'http' 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: res, to_repl = self._connect_to(netloc, soc) if res: self.log_request() soc.send("%s %s %s\r\n" % ( self.command, urlparse.urlunparse(('', '', path, params, query, '')), self.request_version)) if (re.match("(\w+\.)*gnunet$", self.headers['Host'])): leho = os.popen("gnunet-gns -t LEHO -u "+self.headers['Host']).readlines() if (len(leho) < 2): print "Legacy hostname lookup failed!" elif (len(leho) == 1): print "Legacy hostname not present!" else: newhost = leho[1].split(" ")[-1].rstrip() print "Changing Host: "+self.headers['Host']+" to "+newhost self.headers['Host'] = newhost self.headers['Connection'] = 'close' del self.headers['Proxy-Connection'] del self.headers['Accept-Encoding'] for key_val in self.headers.items(): soc.send("%s: %s\r\n" % key_val) soc.send("\r\n") self._read_write(soc, to_repl) finally: print "\t" "bye" soc.close() self.connection.close() def _read_write(self, soc, to_repl="", max_idling=20): iw = [self.connection, soc] ow = [] count = 0 msg = '' while 1: count += 1 (ins, _, exs) = select.select(iw, ow, iw, 3) if exs: break if ins: for i in ins: if i is soc: out = self.connection else: out = soc data = i.recv(8192) if data: #try: data = re.sub(r'\nAccept-Ranges: \w+', r'', data) data = re.sub('(a href="http://(\w+\.)*zkey)', self.shorten_zkey(), data) if (re.match("(\w+\.)*gnunet$", self.host_port[0])): arr = self.host_port[0].split('.') arr.pop(0) data = re.sub('(a href="http://(\w+\.)*)(\+)', self.replace_and_shorten(to_repl), data) out.send(data) count = 0 #except: # print "GNS exception:", sys.exc_info()[0] else: print "\t" "idle", count print msg if count == max_idling: break do_HEAD = do_GET do_POST = do_GET do_PUT = do_GET do_DELETE=do_GET class ThreadingHTTPServer (SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer): pass if __name__ == '__main__': from sys import argv if argv[1:] and argv[1] in ('-h', '--help'): print argv[0], "[port [allowed_client_name ...]]" else: if argv[2:]: allowed = [] for name in argv[2:]: client = socket.gethostbyname(name) allowed.append(client) print "Accept: %s (%s)" % (client, name) ProxyHandler.allowed_clients = allowed del argv[2:] else: print "Any clients will be served..." BaseHTTPServer.test(ProxyHandler, ThreadingHTTPServer)