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import os,sys,logging
import signal,time, atexit
from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
import xmlrpclib,sqlite3
import bb.server.xmlrpc
import prserv
import prserv.db
if sys.hexversion < 0x020600F0:
print("Sorry, python 2.6 or later is required.")
sys.exit(1)
class Handler(SimpleXMLRPCRequestHandler):
def _dispatch(self,method,params):
try:
value=self.server.funcs[method](*params)
except:
import traceback
traceback.print_exc()
raise
return value
class PRServer(SimpleXMLRPCServer):
pidfile="/tmp/PRServer.pid"
def __init__(self, dbfile, logfile, interface, daemon=True):
''' constructor '''
SimpleXMLRPCServer.__init__(self, interface,
requestHandler=SimpleXMLRPCRequestHandler,
logRequests=False, allow_none=True)
self.dbfile=dbfile
self.daemon=daemon
self.logfile=logfile
self.host, self.port = self.socket.getsockname()
self.db=prserv.db.PRData(dbfile)
self.table=self.db["PRMAIN"]
self.register_function(self.getPR, "getPR")
self.register_function(self.quit, "quit")
self.register_function(self.ping, "ping")
self.register_introspection_functions()
def ping(self):
return not self.quit
def getPR(self, version, checksum):
try:
return self.table.getValue(version,checksum)
except prserv.NotFoundError:
logging.error("can not find value for (%s, %s)",version,checksum)
return None
except sqlite3.Error as exc:
logging.error(str(exc))
return None
def quit(self):
self.quit=True
return
def _serve_forever(self):
self.quit = False
self.timeout = 0.5
while not self.quit:
self.handle_request()
logging.info("PRServer: stopping...")
self.server_close()
return
def start(self):
if self.daemon is True:
logging.info("PRServer: starting daemon...")
self.daemonize()
else:
logging.info("PRServer: starting...")
self._serve_forever()
def delpid(self):
os.remove(PRServer.pidfile)
def daemonize(self):
"""
See Advanced Programming in the UNIX, Sec 13.3
"""
os.umask(0)
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError as e:
sys.stderr.write("1st fork failed: %d %s\n" % (e.errno, e.strerror))
sys.exit(1)
os.setsid()
"""
fork again to make sure the daemon is not session leader,
which prevents it from acquiring controlling terminal
"""
try:
pid = os.fork()
if pid > 0: #parent
sys.exit(0)
except OSError as e:
sys.stderr.write("2nd fork failed: %d %s\n" % (e.errno, e.strerror))
sys.exit(1)
os.chdir("/")
sys.stdout.flush()
sys.stderr.flush()
si = file('/dev/null', 'r')
so = file(self.logfile, 'a+')
se = so
os.dup2(si.fileno(),sys.stdin.fileno())
os.dup2(so.fileno(),sys.stdout.fileno())
os.dup2(se.fileno(),sys.stderr.fileno())
# write pidfile
atexit.register(self.delpid)
pid = str(os.getpid())
pf = file(PRServer.pidfile, 'w+')
pf.write("%s\n" % pid)
pf.write("%s\n" % self.host)
pf.write("%s\n" % self.port)
pf.close()
self._serve_forever()
class PRServerConnection():
def __init__(self, host, port):
self.connection = bb.server.xmlrpc._create_server(host, port)
self.host = host
self.port = port
def terminate(self):
# Don't wait for server indefinitely
import socket
socket.setdefaulttimeout(2)
try:
self.connection.quit()
except:
pass
def getPR(self, version, checksum):
return self.connection.getPR(version, checksum)
def ping(self):
return self.connection.ping()
def start_daemon(options):
try:
pf = file(PRServer.pidfile,'r')
pid = int(pf.readline().strip())
pf.close()
except IOError:
pid = None
if pid:
sys.stderr.write("pidfile %s already exist. Daemon already running?\n"
% PRServer.pidfile)
sys.exit(1)
server = PRServer(options.dbfile, interface=(options.host, options.port),
logfile=os.path.abspath(options.logfile))
server.start()
def stop_daemon():
try:
pf = file(PRServer.pidfile,'r')
pid = int(pf.readline().strip())
host = pf.readline().strip()
port = int(pf.readline().strip())
pf.close()
except IOError:
pid = None
if not pid:
sys.stderr.write("pidfile %s does not exist. Daemon not running?\n"
% PRServer.pidfile)
sys.exit(1)
PRServerConnection(host,port).terminate()
time.sleep(0.5)
try:
while 1:
os.kill(pid,signal.SIGTERM)
time.sleep(0.1)
except OSError as err:
err = str(err)
if err.find("No such process") > 0:
if os.path.exists(PRServer.pidfile):
os.remove(PRServer.pidfile)
else:
print err
sys.exit(1)
|
