def serve(self) -> None:
"""Serve requests, synchronously (no thread or fork)."""
try:
sock = self.create_listening_socket()
if self.timeout is not None:
sock.settimeout(self.timeout)
try:
with open(STATUS_FILE, 'w') as f:
json.dump(
{
'pid': os.getpid(),
'sockname': sock.getsockname()
}, f)
f.write('\n') # I like my JSON with trailing newline
while True:
try:
conn, addr = sock.accept()
except socket.timeout:
print("Exiting due to inactivity.")
reset_global_state()
sys.exit(0)
try:
data = receive(conn)
except OSError as err:
conn.close() # Maybe the client hung up
continue
resp = {} # type: Dict[str, Any]
if 'command' not in data:
resp = {'error': "No command found in request"}
else:
command = data['command']
if not isinstance(command, str):
resp = {'error': "Command is not a string"}
else:
command = data.pop('command')
try:
resp = self.run_command(command, data)
except Exception:
# If we are crashing, report the crash to the client
tb = traceback.format_exception(
*sys.exc_info()) # type: ignore
resp = {'error': "Daemon crashed!\n" + "".join(tb)}
conn.sendall(json.dumps(resp).encode('utf8'))
raise
try:
conn.sendall(json.dumps(resp).encode('utf8'))
except OSError as err:
pass # Maybe the client hung up
conn.close()
if command == 'stop':
sock.close()
reset_global_state()
sys.exit(0)
finally:
os.unlink(STATUS_FILE)
finally:
shutil.rmtree(self.sock_directory)
exc_info = sys.exc_info()
if exc_info[0] and exc_info[0] is not SystemExit:
traceback.print_exception(*exc_info) # type: ignore
def serve(self) -> None:
"""Serve requests, synchronously (no thread or fork)."""
command = None
try:
server = IPCServer(CONNECTION_NAME, self.timeout)
with open(self.status_file, 'w') as f:
json.dump(
{
'pid': os.getpid(),
'connection_name': server.connection_name
}, f)
f.write('\n') # I like my JSON with a trailing newline
while True:
with server:
data = receive(server)
resp = {} # type: Dict[str, Any]
if 'command' not in data:
resp = {'error': "No command found in request"}
else:
command = data['command']
if not isinstance(command, str):
resp = {'error': "Command is not a string"}
else:
command = data.pop('command')
try:
resp = self.run_command(command, data)
except Exception:
# If we are crashing, report the crash to the client
tb = traceback.format_exception(
*sys.exc_info())
resp = {
'error': "Daemon crashed!\n" + "".join(tb)
}
resp.update(self._response_metadata())
server.write(json.dumps(resp).encode('utf8'))
raise
try:
resp.update(self._response_metadata())
server.write(json.dumps(resp).encode('utf8'))
except OSError:
pass # Maybe the client hung up
if command == 'stop':
reset_global_state()
sys.exit(0)
finally:
# If the final command is something other than a clean
# stop, remove the status file. (We can't just
# simplify the logic and always remove the file, since
# that could cause us to remove a future server's
# status file.)
if command != 'stop':
os.unlink(self.status_file)
try:
server.cleanup() # try to remove the socket dir on Linux
except OSError:
pass
exc_info = sys.exc_info()
if exc_info[0] and exc_info[0] is not SystemExit:
traceback.print_exception(*exc_info)
def serve(self) -> None:
"""Serve requests, synchronously (no thread or fork)."""
command = None
try:
server = IPCServer(CONNECTION_NAME, self.timeout)
with open(self.status_file, 'w') as f:
json.dump({'pid': os.getpid(), 'connection_name': server.connection_name}, f)
f.write('\n') # I like my JSON with a trailing newline
while True:
with server:
data = receive(server)
resp = {} # type: Dict[str, Any]
if 'command' not in data:
resp = {'error': "No command found in request"}
else:
command = data['command']
if not isinstance(command, str):
resp = {'error': "Command is not a string"}
else:
command = data.pop('command')
try:
resp = self.run_command(command, data)
except Exception:
# If we are crashing, report the crash to the client
tb = traceback.format_exception(*sys.exc_info())
resp = {'error': "Daemon crashed!\n" + "".join(tb)}
resp.update(self._response_metadata())
server.write(json.dumps(resp).encode('utf8'))
raise
try:
resp.update(self._response_metadata())
server.write(json.dumps(resp).encode('utf8'))
except OSError:
pass # Maybe the client hung up
if command == 'stop':
reset_global_state()
sys.exit(0)
finally:
# If the final command is something other than a clean
# stop, remove the status file. (We can't just
# simplify the logic and always remove the file, since
# that could cause us to remove a future server's
# status file.)
if command != 'stop':
os.unlink(self.status_file)
try:
server.cleanup() # try to remove the socket dir on Linux
except OSError:
pass
exc_info = sys.exc_info()
if exc_info[0] and exc_info[0] is not SystemExit:
traceback.print_exception(*exc_info)
