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#!/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
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:
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 = "+"
self.host_port = netloc[:i], int(netloc[i+1:])
else:
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 = "+"
self.host_port = netloc, 80
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 shorten_zkey(self):
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.split(" ")) > 0):
return 'a href="http://'+lines.split(" ")[-1].rstrip()
else:
return to_repl
def replace_and_shorten(self, to_repl):
return lambda mo: test_re(self, 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)
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