# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# Issues:
+# - There is no easy way of stopping a running daemon.
+
+
# Todo list:
-# - Setup some option parsing so the daemon can take optional command line
-# arguments.
+# - Use a pid file to make stopping a running daemon easy.
+# - add {start|stop|restart} command line arguments to make the cookie_daemon
+# functionally similar to the daemons found in /etc/init.d/ (in gentoo)
+# or /etc/rc.d/ (in arch).
+# - Add option to create a throwaway cookie jar in /tmp and delete it upon
+# closing the daemon.
import cookielib
import socket
import time
import atexit
+from traceback import print_exc
from signal import signal, SIGTERM
+from optparse import OptionParser
try:
import cStringIO as StringIO
# ::: Default configuration section ::::::::::::::::::::::::::::::::::::::::::
# ============================================================================
+
# Location of the uzbl cache directory.
if 'XDG_CACHE_HOME' in os.environ.keys() and os.environ['XDG_CACHE_HOME']:
cache_dir = os.path.join(os.environ['XDG_CACHE_HOME'], 'uzbl/')
else:
data_dir = os.path.join(os.environ['HOME'], '.local/share/uzbl/')
-# Create cache dir and data dir if they are missing.
-for path in [data_dir, cache_dir]:
- if not os.path.exists(path):
- os.makedirs(path)
-
# Default config
-cookie_socket = os.path.join(cache_dir, 'cookie_daemon_socket')
-cookie_jar = os.path.join(data_dir, 'cookies.txt')
+config = {
+
+ # Default cookie jar and daemon socket locations.
+ 'cookie_socket': os.path.join(cache_dir, 'cookie_daemon_socket'),
+ 'cookie_jar': os.path.join(data_dir, 'cookies.txt'),
-# Time out after x seconds of inactivity (set to 0 for never time out).
-# Set to 0 by default until talk_to_socket is doing the spawning.
-daemon_timeout = 0
+ # Time out after x seconds of inactivity (set to 0 for never time out).
+ # Set to 0 by default until talk_to_socket is doing the spawning.
+ 'daemon_timeout': 0,
-# Enable/disable daemonizing the process (useful when debugging).
-# Set to False by default until talk_to_socket is doing the spawning.
-daemon_mode = False
+ # Tell process to daemonise
+ 'daemon_mode': True,
+
+ # Set true to print helpful debugging messages to the terminal.
+ 'verbose': False,
+
+} # End of config dictionary.
-# Set true to print helpful debugging messages to the terminal.
-verbose = True
# ============================================================================
# ::: End of configuration section :::::::::::::::::::::::::::::::::::::::::::
_scriptname = os.path.basename(sys.argv[0])
def echo(msg):
- if verbose:
+ if config['verbose']:
print "%s: %s" % (_scriptname, msg)
+def mkbasedir(filepath):
+ '''Create base directory of filepath if it doesn't exist.'''
+
+ dirname = os.path.dirname(filepath)
+ if not os.path.exists(dirname):
+ echo("creating dirs: %r" % dirname)
+ os.makedirs(dirname)
+
+
class CookieMonster:
'''The uzbl cookie daemon class.'''
- def __init__(self, cookie_socket, cookie_jar, daemon_timeout,\
- daemon_mode):
+ def __init__(self):
+ '''Initialise class variables.'''
- self.cookie_socket = os.path.expandvars(cookie_socket)
self.server_socket = None
- self.cookie_jar = os.path.expandvars(cookie_jar)
- self.daemon_mode = daemon_mode
self.jar = None
- self.daemon_timeout = daemon_timeout
self.last_request = time.time()
+ self._running = False
+
-
def run(self):
'''Start the daemon.'''
-
+
# Check if another daemon is running. The reclaim_socket function will
- # exit if another daemon is detected listening on the cookie socket
- # and remove the abandoned socket if there isnt.
- if os.path.exists(self.cookie_socket):
+ # exit if another daemon is detected listening on the cookie socket
+ # and remove the abandoned socket if there isnt.
+ if os.path.exists(config['cookie_socket']):
self.reclaim_socket()
# Daemonize process.
- if self.daemon_mode:
+ if config['daemon_mode']:
echo("entering daemon mode.")
self.daemonize()
-
- # Register a function to cleanup on exit.
+
+ # Register a function to cleanup on exit.
atexit.register(self.quit)
# Make SIGTERM act orderly.
signal(SIGTERM, lambda signum, stack_frame: sys.exit(1))
-
- # Create cookie daemon socket.
- self.create_socket()
-
+
# Create cookie jar object from file.
self.open_cookie_jar()
-
- try:
- # Listen for incoming cookie puts/gets.
- self.listen()
-
- except KeyboardInterrupt:
- print
- except:
- # Clean up
+ # Creating a way to exit nested loops by setting a running flag.
+ self._running = True
+
+ while self._running:
+ # Create cookie daemon socket.
+ self.create_socket()
+
+ try:
+ # Enter main listen loop.
+ self.listen()
+
+ except KeyboardInterrupt:
+ self._running = False
+ print
+
+ except socket.error:
+ print_exc()
+
+ except:
+ # Clean up
+ self.del_socket()
+
+ # Raise exception
+ raise
+
+ # Always delete the socket before calling create again.
self.del_socket()
- # Raise exception
- raise
-
def reclaim_socket(self):
'''Check if another process (hopefully a cookie_daemon.py) is listening
- on the cookie daemon socket. If another process is found to be
- listening on the socket exit the daemon immediately and leave the
+ on the cookie daemon socket. If another process is found to be
+ listening on the socket exit the daemon immediately and leave the
socket alone. If the connect fails assume the socket has been abandoned
and delete it (to be re-created in the create socket function).'''
-
+
+ cookie_socket = config['cookie_socket']
+
try:
sock = socket.socket(socket.AF_UNIX, socket.SOCK_SEQPACKET)
- sock.connect(self.cookie_socket)
+ sock.connect(cookie_socket)
sock.close()
except socket.error:
# Failed to connect to cookie_socket so assume it has been
# abandoned by another cookie daemon process.
- echo("reclaiming abandoned cookie_socket %r." % self.cookie_socket)
- if os.path.exists(self.cookie_socket):
- os.remove(self.cookie_socket)
+ echo("reclaiming abandoned cookie_socket %r." % cookie_socket)
+ if os.path.exists(cookie_socket):
+ os.remove(cookie_socket)
- return
+ return
- echo("detected another process listening on %r." % self.cookie_socket)
+ echo("detected another process listening on %r." % cookie_socket)
echo("exiting.")
# Use os._exit() to avoid tripping the atexit cleanup function.
os._exit(1)
except OSError, e:
sys.stderr.write("fork #1 failed: %s\n" % e)
sys.exit(1)
-
+
os.chdir('/')
os.setsid()
os.umask(0)
-
+
try:
if os.fork(): os._exit(0)
except OSError, e:
sys.stderr.write("fork #2 failed: %s\n" % e)
sys.exit(1)
-
+
sys.stdout.flush()
sys.stderr.flush()
os.dup2(stdin.fileno(), sys.stdin.fileno())
os.dup2(stdout.fileno(), sys.stdout.fileno())
os.dup2(stderr.fileno(), sys.stderr.fileno())
-
+
def open_cookie_jar(self):
'''Open the cookie jar.'''
-
+
+ cookie_jar = config['cookie_jar']
+ mkbasedir(cookie_jar)
+
# Create cookie jar object from file.
- self.jar = cookielib.MozillaCookieJar(self.cookie_jar)
+ self.jar = cookielib.MozillaCookieJar(cookie_jar)
try:
# Attempt to load cookies from the cookie jar.
self.jar.load(ignore_discard=True)
- # Ensure restrictive permissions are set on the cookie jar
- # to prevent other users on the system from hi-jacking your
+ # Ensure restrictive permissions are set on the cookie jar
+ # to prevent other users on the system from hi-jacking your
# authenticated sessions simply by copying your cookie jar.
- os.chmod(self.cookie_jar, 0600)
+ os.chmod(cookie_jar, 0600)
except:
pass
def create_socket(self):
'''Create AF_UNIX socket for interprocess uzbl instance <-> cookie
daemon communication.'''
-
+
+ cookie_socket = config['cookie_socket']
+ mkbasedir(cookie_socket)
+
self.server_socket = socket.socket(socket.AF_UNIX,\
socket.SOCK_SEQPACKET)
- if os.path.exists(self.cookie_socket):
+ if os.path.exists(cookie_socket):
# Accounting for super-rare super-fast racetrack condition.
self.reclaim_socket()
-
- self.server_socket.bind(self.cookie_socket)
-
+
+ self.server_socket.bind(cookie_socket)
+
# Set restrictive permissions on the cookie socket to prevent other
- # users on the system from data-mining your cookies.
- os.chmod(self.cookie_socket, 0600)
+ # users on the system from data-mining your cookies.
+ os.chmod(cookie_socket, 0600)
def listen(self):
'''Listen for incoming cookie PUT and GET requests.'''
- while True:
- # This line tells the socket how many pending incoming connections
- # to enqueue. I haven't had any broken pipe errors so far while
+ echo("listening on %r" % config['cookie_socket'])
+
+ while self._running:
+ # This line tells the socket how many pending incoming connections
+ # to enqueue. I haven't had any broken pipe errors so far while
# using the non-obvious value of 1 under heavy load conditions.
self.server_socket.listen(1)
-
+
if bool(select.select([self.server_socket],[],[],1)[0]):
client_socket, _ = self.server_socket.accept()
self.handle_request(client_socket)
self.last_request = time.time()
client_socket.close()
-
- if self.daemon_timeout:
+
+ if config['daemon_timeout']:
idle = time.time() - self.last_request
- if idle > self.daemon_timeout: break
-
+ if idle > config['daemon_timeout']:
+ self._running = False
+
def handle_request(self, client_socket):
'''Connection made, now to serve a cookie PUT or GET request.'''
-
+
# Receive cookie request from client.
data = client_socket.recv(8192)
if not data: return
# Cookie argument list in packet is null separated.
argv = data.split("\0")
+ # Catch the EXIT command sent to kill the daemon.
+ if len(argv) == 1 and argv[0].strip() == "EXIT":
+ self._running = False
+ return None
+
# Determine whether or not to print cookie data to terminal.
- print_cookie = (verbose and not self.daemon_mode)
+ print_cookie = (config['verbose'] and not config['daemon_mode'])
if print_cookie: print ' '.join(argv[:4])
-
+
action = argv[0]
-
+
uri = urllib2.urlparse.ParseResult(
scheme=argv[1],
netloc=argv[2],
params='',
query='',
fragment='').geturl()
-
+
req = urllib2.Request(uri)
if action == "GET":
res = urllib2.addinfourl(StringIO.StringIO(), hdr,\
req.get_full_url())
self.jar.extract_cookies(res,req)
- self.jar.save(ignore_discard=True)
+ self.jar.save(ignore_discard=True)
if print_cookie: print
-
+
def quit(self, *args):
'''Called on exit to make sure all loose ends are tied up.'''
-
+
# Only one loose end so far.
self.del_socket()
os._exit(0)
-
+
def del_socket(self):
- '''Remove the cookie_socket file on exit. In a way the cookie_socket
+ '''Remove the cookie_socket file on exit. In a way the cookie_socket
is the daemons pid file equivalent.'''
-
+
if self.server_socket:
- self.server_socket.close()
+ try:
+ self.server_socket.close()
+
+ except:
+ pass
+
+ self.server_socket = None
- if os.path.exists(self.cookie_socket):
- os.remove(self.cookie_socket)
+ cookie_socket = config['cookie_socket']
+ if os.path.exists(cookie_socket):
+ echo("deleting socket %r" % cookie_socket)
+ os.remove(cookie_socket)
if __name__ == "__main__":
-
- CookieMonster(cookie_socket, cookie_jar, daemon_timeout,\
- daemon_mode).run()
+
+ parser = OptionParser()
+ parser.add_option('-n', '--no-daemon', dest='no_daemon',\
+ action='store_true', help="don't daemonise the process.")
+
+ parser.add_option('-v', '--verbose', dest="verbose",\
+ action='store_true', help="print verbose output.")
+
+ parser.add_option('-t', '--daemon-timeout', dest='daemon_timeout',\
+ action="store", metavar="SECONDS", help="shutdown the daemon after x "\
+ "seconds inactivity. WARNING: Do not use this when launching the "\
+ "cookie daemon manually.")
+
+ parser.add_option('-s', '--cookie-socket', dest="cookie_socket",\
+ metavar="SOCKET", help="manually specify the socket location.")
+
+ parser.add_option('-j', '--cookie-jar', dest='cookie_jar',\
+ metavar="FILE", help="manually specify the cookie jar location.")
+
+ (options, args) = parser.parse_args()
+
+ if options.verbose:
+ config['verbose'] = True
+ echo("verbose mode on.")
+
+ if options.no_daemon:
+ echo("daemon mode off")
+ config['daemon_mode'] = False
+
+ if options.cookie_socket:
+ echo("using cookie_socket %r" % options.cookie_socket)
+ config['cookie_socket'] = options.cookie_socket
+
+ if options.cookie_jar:
+ echo("using cookie_jar %r" % options.cookie_jar)
+ config['cookie_jar'] = options.cookie_jar
+
+ if options.daemon_timeout:
+ try:
+ config['daemon_timeout'] = int(options.daemon_timeout)
+ echo("set timeout to %d seconds." % config['daemon_timeout'])
+
+ except ValueError:
+ config['verbose'] = True
+ echo("fatal error: expected int argument for --daemon-timeout")
+ sys.exit(1)
+
+ for key in ['cookie_socket', 'cookie_jar']:
+ config[key] = os.path.expandvars(config[key])
+
+ CookieMonster().run()
projects / uzbl-mobile / blobdiff