+
−#!/usr/bin/env 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
+
−"""
+
−
+
−__version__ = "0.2.1"
+
−
+
−import BaseHTTPServer, select, socket, SocketServer, urlparse, os
+
−
+
−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
+
−        allowed = getattr(self, 'allowed_clients', None)
+
−        if allowed is not None and ip not in allowed:
+
−            self.raw_requestline = self.rfile.readline()
+
−            if self.parse_request():
+
−                self.send_error(403)
+
−        else:
+
−            self.__base_handle()
+
−
+
−    def log_request(self, code='-', size='-'):
+
−        xheaders = [h for h in self.headers.items() if h[0].startswith('x-')]
+
−        self.log_message('"%s" %s %s%s',
+
−                         self.requestline, str(code), str(size),
+
−                         ''.join([' %s:%s' % h for h in sorted(xheaders)]))
+
−
+
−    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
+
−        print "\t" "connect to %s:%d" % host_port
+
−        try: soc.connect(host_port)
+
−        except socket.error, arg:
+
−            try: msg = arg[1]
+
−            except (IndexError, TypeError): 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:
+
−            print "\t" "bye"
+
−            soc.close()
+
−            self.connection.close()
+
−
+
−    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:
+
−            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)
+
−        finally:
+
−            print "\t" "bye"
+
−            soc.close()
+
−            self.connection.close()
+
−
+
−    def _read_write(self, soc, max_idling=20):
+
−        iw = [self.connection, soc]
+
−        ow = []
+
−        count = 0
+
−        while True:
+
−            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:
+
−                        out.send(data)
+
−                        count = 0
+
−            else:
+
−                print "\t" "idle", count
+
−            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):
+
−    def __init__(self, *args, **kwargs):
+
−        BaseHTTPServer.HTTPServer.__init__(self, *args, **kwargs)
+
−        a = open("proxy.pid", "w")
+
−        a.write(str(os.getpid()) + "\n")
+
−        a.close()
+
−
+
−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)