4 # Simple socket policy file server for Flash
6 # Usage: flashpolicyd.py [--port=N] --file=FILE
9 # Requires Python 2.5 or later
11 from __future__ import with_statement
24 """Daemonize the current process."""
31 devnull = os.open(os.devnull, os.O_RDWR)
33 # xxx fixme - this is just to make sure that nothing gets stupidly lost -
35 crashlog = os.open('/var/log/sfa_flashpolicy.log', os.O_RDWR | os.O_APPEND | os.O_CREAT, 0644)
40 class policy_server(object):
42 def __init__(self, port, path):
45 self.policy = self.read_policy(path)
46 self.log('Listening on port %d\n' % port)
48 self.sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
49 except AttributeError:
50 # AttributeError catches Python built without IPv6
51 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
53 # socket.error catches OS with IPv6 disabled
54 self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
55 self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
56 self.sock.bind(('', port))
59 def read_policy(self, path):
60 with open(path, 'rb') as f:
61 policy = f.read(10001)
62 if len(policy) > 10000:
63 raise exceptions.RuntimeError('File probably too large to be a policy file',
65 if 'cross-domain-policy' not in policy:
66 raise exceptions.RuntimeError('Not a valid policy file',
73 thread.start_new_thread(self.handle, self.sock.accept())
74 except socket.error as e:
75 self.log('Error accepting connection: %s' % e[1])
77 def handle(self, conn, addr):
78 addrstr = '%s:%s' % (addr[0], addr[1])
80 self.log('Connection from %s' % addrstr)
81 with contextlib.closing(conn):
82 # It's possible that we won't get the entire request in
83 # a single recv, but very unlikely.
84 request = conn.recv(1024).strip()
85 # if request != '<policy-file-request/>\0':
86 # self.log('Unrecognized request from %s: %s' % (addrstr, request))
88 self.log('Valid request received from %s' % addrstr)
89 conn.sendall(self.policy)
90 self.log('Sent policy file to %s' % addrstr)
91 except socket.error as e:
92 self.log('Error handling connection from %s: %s' % (addrstr, e[1]))
93 except Exception as e:
94 self.log('Error handling connection from %s: %s' % (addrstr, e[1]))
97 print >>sys.stderr, str
101 parser = optparse.OptionParser(usage='%prog [--port=PORT] --file=FILE',
102 version='%prog ' + str(VERSION))
103 parser.add_option('-p', '--port', dest='port', type=int, default=843,
104 help='listen on port PORT', metavar='PORT')
105 parser.add_option('-f', '--file', dest='path',
106 help='server policy file FILE', metavar='FILE')
107 parser.add_option("-d", "--daemon", dest="daemon", action="store_true",
108 help="Run as daemon.", default=False)
109 opts, args = parser.parse_args()
111 parser.error('No arguments are needed. See help.')
113 parser.error('File must be specified. See help.')
118 policy_server(opts.port, opts.path).run()
119 except Exception as e:
120 print >> sys.stderr, e
122 except KeyboardInterrupt:
125 if __name__ == '__main__':