I am trying to start a client, but it gives a "database is closed" error.
What should I do?
from telethon import TelegramClient
api_id = 12345
api_hash = '##################'
phone_number = '+##########'
channel_username = 'tehrandb'
client = TelegramClient('session_name', api_id, api_hash)
assert client.connect()
if not client.is_user_authorized():
client.send_code_request(phone_number)
me = client.sign_in(phone_number, input('Enter code: '))
Just in case anyone else gets the same error. Database is closed means that you have an already running process using the same session file (which is session_name.session in the question). The same session file can only be used by 1 process at a time so you need to kill one of them.
if you are under Linux you can use fuser session_name.session to see the list of processes using that file.
Related
I'm trying to make a discord bot and I've added functionality of the tasks repeating after 24 hours using tasks.loop after at an interval of 24 hours( 64800 seconds). Since the code is run on repl.it, I've used uptime robot to continuously send a ping after 5 minutes to make it running always in the repl.it.
My issue is that even after checking historyin the channel the message is getting send again as you can see in the below image. ( by checking here I mean the explanation which is the explanation that comes with the API). I'm using NASA api here.
Code snippet
def get_APOD():
image = requests.get("https://api.nasa.gov/planetary/apod?api_key="+apod)
json_data = json.loads(image.text)
description = json_data["url"]
explanation = "'" + json_data["explanation"]+ "'"
title = json_data["title"]
return description,explanation,title
#client.event
async def on_ready():
print('We have logged in as {0.user}'.format(client))
send_message.start()
#tasks.loop(seconds=64800.0)
async def send_message():
channel = client.get_channel(int(apod_channel))
messages = await channel.history(limit=1).flatten()
description,explanation,title = get_APOD()
if messages[0].content == explanation:
print("Its the same")
else:
await channel.send(description)
await channel.send(title)
await channel.send(explanation)
. Here you can see the messages repeating twice. It shouldn't by the code I've written here. Since it check for the history in the channel.
What is the issue here? Appreciate any help.
EDIT: When I restart the repl.it IDE the code will run alright and print "It's the same" as it should if the message is already sent but otherwise it's failing.
currently, I am writing an AWS Lambda function and the idea is, that someone can send an email to a specific address with a username and AD group and it will trigger the function and add this person to the desired group.
I am using the python module ldap3 and the conn.search part is working, aswell as the addUsersInGroup, but only if I run it separately. If I create a script where I already have the cn or dn name of both user and group and use the addUsersInGroup Function it works, but if I do a conn.search somewhere before it somehow can't establish the connection for the add-to-group part.
from ldap3 import Server, Connection, ALL, NTLM, SUBTREE
from ldap3.extend.microsoft.addMembersToGroups import ad_add_members_to_groups as addUsersInGroups
import email
import os
import json
email = "sample#test.com"
subject = "username,ad-group"
user = subject.split(",")[0]
group = subject.split(",")[1]
emaildomain = email.split("#")[1]
domaingroup = ["test.com"]
adgroups = ["group1","group2"]
server = Server('serverIP', use_ssl=True, get_info=ALL)
conn = Connection(server, OU,
password, auto_bind=True)
def find_user():
user_criteria = "(&(objectClass=user)(sAMAccountName=%s))"%user
if conn.search("OU", user_criteria):
result = str(conn.entries)
user_dn = result.split("-")[0].replace("[DN: ","")
return user_dn
return nouser
def find_group():
group_criteria = "(&(objectClass=group)(sAMAccountName=%s))"%group
if conn.search("OU", group_criteria):
result_group = str(conn.entries)
group_dn = result_group.split("-")[0].replace("[DN: ","")
return group_dn
return nogroup
def add_to_group(user,group):
addUsersInGroups(conn,user,group)
if emaildomain in domaingroup:
user = find_user()
group = find_group()
add_to_group(user,group)
Please note that I had to delete some things off the script for security reasons.
The connection to search for a user or group is working and if I run the add-to-group function it works too, but only running it without any search beforehand.
Somehow I have the feeling that making the conn.search blocks the connection for anything search related and if try to use the same connection for something different e.g. adding a user to group, that request gets blocked.
Here is the error I receive:
Error_Message
Found the solution on this website:
https://github.com/cannatag/ldap3/issues/442
You are getting this error probably due to auto_referrals=True in Connection by default. Try to use:
conn = Connection(server, "cn=xxx,cn=users,dc=wwww,dc=zzzz,dc=com", "my_pass", auto_bind=True, auto_referrals=False) and do not search and another DC.
I am a newbie. My current project is when the current end decides to start the modbus service, I will create a process for the modbus service. Then the value is obtained in the parent process, through the ZeroMQ PUB/SUB to pass the value, I now want to update the value of the modbus register in the modbus service process.
I tried the method mentioned by pymodbus provided by updating_server.py, and twisted.internet.task.LoopingCall() to update the value of the register, but this will make it impossible for me to connect to my server with the client. I don't know why?
Use LoopingCall() to establish the server, the log when the client connects.
Then I tried to put both the uploading and startTCPserver in the async loop, but the update was only entered for the first time after the startup, and then it was not entered.
Currently, I'm using the LoopingCall() to handle updates, but I don't think this is a good way.
This is the code I initialized the PUB and all the tags that can read the tag.
from loop import cycle
import asyncio
from multiprocessing import Process
from persistence import models as pmodels
from persistence import service as pservice
from persistence import basic as pbasic
import zmq
from zmq.asyncio import Context
from common import logging
from server.modbustcp import i3ot_tcp as sertcp
import common.config as cfg
import communication.admin as ca
import json
import os
import signal
from datetime import datetime
from server.opcuaserver import i3ot_opc as seropc
async def main():
future = []
task = []
global readers, readers_old, task_flag
logger.debug("connecting to database and create table.")
pmodels.connect_create()
logger.debug("init read all address to create loop task.")
cycle.init_readers(readers)
ctx = Context()
publisher = ctx.socket(zmq.PUB)
logger.debug("init publish [%s].", addrs)
publisher.bind(addrs)
readers_old = readers.copy()
for reader in readers:
task.append(asyncio.ensure_future(
cycle.run_readers(readers[reader], publisher)))
if not len(task):
task_flag = True
logger.debug("task length [%s - %s].", len(task), task)
opcua_server = LocalServer(seropc.opc_server, "opcua")
future = [
start_get_all_address(),
start_api(),
create_address_loop(publisher, task),
modbus_server(),
opcua_server.run()
]
logger.debug("run loop...")
await asyncio.gather(*future)
asyncio.run(main(), debug=False)
This is to get the device tag value and publish it.
async def run_readers(reader, publisher):
while True:
await reader.run(publisher)
class DataReader:
def __init__(self, freq, clients):
self._addresses = []
self._frequency = freq
self._stop_signal = False
self._clients = clients
self.signature = sign_data_reader(self._addresses)
async def run(self, publisher):
while not self._stop_signal:
for addr in self._addresses:
await addr.read()
data = {
"type": "value",
"data": addr._final_value
}
publisher.send_pyobj(data)
if addr._status:
if addr.alarm_log:
return_alarm_log = pbasic.get_log_by_time(addr.alarm_log['date'])
if return_alarm_log:
data = {
"type": "alarm",
"data": return_alarm_log
}
publisher.send_pyobj(data)
self.data_send(addr)
logger.debug("run send data")
await asyncio.sleep(int(self._frequency))
def stop(self):
self._stop_signal = True
modbus server imports
from common import logging
from pymodbus.server.asynchronous import StartTcpServer
from pymodbus.device import ModbusDeviceIdentification
from pymodbus.datastore import ModbusSequentialDataBlock
from pymodbus.datastore import ModbusSlaveContext, ModbusServerContext
from persistence import service as pservice
from persistence import basic as pbasic
import zmq
import common.config as cfg
import struct
import os
import signal
from datetime import datetime
from twisted.internet.task import LoopingCall
def updating_writer(a):
logger.info("in updates of modbus tcp server.")
context = a[0]
# while True:
if check_pid(os.getppid()) is False:
os.kill(os.getpid(), signal.SIGKILL)
url = ("ipc://{}" .format(cfg.get('ipc', 'pubsub')))
logger.debug("connecting to [%s].", url)
ctx = zmq.Context()
subscriber = ctx.socket(zmq.SUB)
subscriber.connect(url)
subscriber.setsockopt(zmq.SUBSCRIBE, b"")
slave_id = 0x00
msg = subscriber.recv_pyobj()
logger.debug("updates.")
if msg['data']['data_type'] in modbus_server_type and msg['type'] == 'value':
addr = pservice.get_mbaddress_to_write_value(msg['data']['id'])
if addr:
logger.debug(
"local address and length [%s - %s].",
addr['local_address'], addr['length'])
values = get_value_by_type(msg['data']['data_type'], msg['data']['final'])
logger.debug("modbus server updates values [%s].", values)
register = get_register(addr['type'])
logger.debug(
"register [%d] local address [%d] and value [%s].",
register, addr['local_address'], values)
context[slave_id].setValues(register, addr['local_address'], values)
# time.sleep(1)
def tcp_server(pid):
logger.info("Get server configure and device's tags.")
st = datetime.now()
data = get_servie_and_all_tags()
if data:
logger.debug("register address space.")
register_address_space(data)
else:
logger.debug("no data to create address space.")
length = register_number()
store = ModbusSlaveContext(
di=ModbusSequentialDataBlock(0, [0] * length),
co=ModbusSequentialDataBlock(0, [0] * length),
hr=ModbusSequentialDataBlock(0, [0] * length),
ir=ModbusSequentialDataBlock(0, [0] * length)
)
context = ModbusServerContext(slaves=store, single=True)
identity = ModbusDeviceIdentification()
identity.VendorName = 'pymodbus'
identity.ProductCode = 'PM'
identity.VendorUrl = 'http://github.com/bashwork/pymodbus/'
identity.ProductName = 'pymodbus Server'
identity.ModelName = 'pymodbus Server'
identity.MajorMinorRevision = '2.2.0'
# ----------------------------------------------------------------------- #
# set loop call and run server
# ----------------------------------------------------------------------- #
try:
logger.debug("thread start.")
loop = LoopingCall(updating_writer, (context, ))
loop.start(1, now=False)
# process = Process(target=updating_writer, args=(context, os.getpid(),))
# process.start()
address = (data['tcp_ip'], int(data['tcp_port']))
nt = datetime.now() - st
logger.info("modbus tcp server begin has used [%s] s.", nt.seconds)
pservice.write_server_status_by_type('modbus', 'running')
StartTcpServer(context, identity=identity, address=address)
except Exception as e:
logger.debug("modbus server start error [%s].", e)
pservice.write_server_status_by_type('modbus', 'closed')
This is the code I created for the modbus process.
def process_stop(p_to_stop):
global ptcp_flag
pid = p_to_stop.pid
os.kill(pid, signal.SIGKILL)
logger.debug("process has closed.")
ptcp_flag = False
def ptcp_create():
global ptcp_flag
pid = os.getpid()
logger.debug("sentry pid [%s].", pid)
ptcp = Process(target=sertcp.tcp_server, args=(pid,))
ptcp_flag = True
return ptcp
async def modbus_server():
logger.debug("get mosbuc server's status.")
global ptcp_flag
name = 'modbus'
while True:
ser = pservice.get_server_status_by_name(name)
if ser['enabled']:
if ser['tcp_status'] == 'closed' or ser['tcp_status'] == 'running':
tags = pbasic.get_tag_by_name(name)
if len(tags):
if ptcp_flag is False:
logger.debug("[%s] status [%s].", ser['tcp_name'], ptcp_flag)
ptcp = ptcp_create()
ptcp.start()
else:
logger.debug("modbus server is running ...")
else:
logger.debug("no address to create [%s] server.", ser['tcp_name'])
pservice.write_server_status_by_type(name, "closed")
else:
logger.debug("[%s] server is running ...", name)
else:
if ptcp_flag:
process_stop(ptcp)
logger.debug("[%s] has been closed.", ser['tcp_name'])
pservice.write_server_status_by_type(name, "closed")
logger.debug("[%s] server not allowed to running.", name)
await asyncio.sleep(5)
This is the command that Docker runs.
/usr/bin/docker run --privileged --network host --name scout-sentry -v /etc/scout.cfg:/etc/scout.cfg -v /var/run:/var/run -v /sys:/sys -v /dev/mem:/dev/mem -v /var/lib/scout:/data --rm shulian/scout-sentry
This is the Docker configuration file /etc/scout.cfg.
[scout]
mode=product
[logging]
level=DEBUG
[db]
path=/data
[ipc]
cs=/var/run/scout-cs.sock
pubsub=/var/run/pubsub.sock
I want to be able to trigger the modbus value update function when there is a message coming from ZeroMQ, and it will be updated correctly.
Let's start from inside out.
Q : ...this will make it impossible for me to connect to my server with the client. I don't know why?
ZeroMQ is a smart broker-less messaging / signaling middleware or better a platform for smart-messaging. In case one feels not so much familiar with the art of Zen-of-Zero as present in ZeroMQ Architecture, one may like to start with ZeroMQ Principles in less than Five Seconds before diving into further details.
The Basis :
The Scalable Formal Communication Archetype, borrowed from ZeroMQ PUB/SUB, does not come at zero-cost.
This means that each infrastructure setup ( both on PUB-side and on SUB-side ) takes some, rather remarkable time and no one can be sure of when the AccessNode cnfiguration results in RTO-state. So the SUB-side (as proposed above) ought be either a permanent entity, or the user shall not expect to make it RTO in zero-time, after a twisted.internet.task.LoopingCall() gets reinstated.
Preferred way: instantiate your (semi-)persistent zmq.Context(), get it configured so as to serve the <aContextInstance>.socket( zmq.PUB ) as needed, a minimum safeguarding setup being the <aSocketInstance>.setsockopt( zmq.LINGER, 0 ) and all transport / queuing / security-handling details, that the exosystem exposes to your code ( whitelisting and secure sizing and resources protection being the most probable candidates - but details are related to your application domain and the risks that you are willing to face being prepared to handle them ).
ZeroMQ strongly discourages from sharing ( zero-sharing ) <aContextInstance>.socket()-instances, yet the zmq.Context()-instance can be shared / re-used (ref. ZeroMQ Principles... ) / passed to more than one threads ( if needed ).
All <aSocketInstance>{.bind()|.connect()}- methods are expensive, so try to setup the infrastructure AccessPoint(s) and their due error-handling way before one tries to use the their-mediated communication services.
Each <aSocketInstance>.setsockopt( zmq.SUBSCRIBE, ... ) is expensive in that it may take ( depending on (local/remote) version ) a form of a non-local, distributed-behaviour - local side "sets" the subscription, yet the remote side has to "be informed" about such state-change and "implements" the operations in line with the actual (propagated) state. While in earlier versions, all messages were dispatched from the PUB-side and all the SUB-side(s) were flooded with such data and were left for "filtering" which will be moved into a local-side internal-Queue, the newer versions "implement" the Topic-Filter on the PUB-side, which further increases the latency of setting the new modus-operandi in action.
Next comes the modus-operandi: how <aSocketInstance>.recv() gets results:
In their default API-state, .recv()-methods are blocking, potentially infinitely blocking, if no messages arrive.
Solution: avoid blocking-forms of calling ZeroMQ <aSocket>.recv()-methods by always using the zmq.NOBLOCK-modes thereof or rather test a presence or absence of any expected-message(s) with <aSocket>.poll( zmq.POLLIN, <timeout> )-methods available, with zero or controlled-timeouts. This makes you the master, who decides about the flow of code-execution. Not doing so, you knowingly let your code depend on external sequence ( or absence ) of events and your architecture is prone to awful problems with handling infinite blocking-states ( or potential unsalvageable many-agents' distributed behaviour live-locks or dead-locks )
Avoid uncontrolled cross-breeding of event-loops - like passing ZeroMQ-driven-loops into an external "callback"-alike handler or async-decorated code-blocks, where the stack of (non-)blocking logics may wreck havoc the original idea just by throwing the system into an unresolvable state, where events miss expected sequence of events and live-locks are unsalvagable or just the first pass happen to go through.
Stacking asyncio-code with twisted-LoopingCall()-s and async/await-decorated code + ZeroMQ blocking .recv()-s is either a Piece-of-Filligrane-Precise-Art-of-Truly-a-Zen-Master, or a sure ticket to Hell - with all respect to the Art-of-Truly-Zen-Masters :o)
So, yes, complex thinking is needed -- welcome to the realms of distributed-computing!
I'm trying to create a simple echo server that can handle multiple connections, I am using select and need to use non blocking sockets but I get an error saying 'BlockingIOError: [Errno 35] Resource temporarily unavailable' on the line where I receive the data.
Here's the server and client code
inputs = [server]
while True:
inready, outready, excready = select.select(inputs, [], [])
for s in inready:
if s == server:
client, address = server.accept()
client.setblocking(0)
print(address)
inready.append(client)
else:
data = s.recv(1024);
if data:
s.send(data)
else:
inputs.remove(s)
s.close()
This little error took me also a while to find:
inready.append(client)
Correct is, of course:
inputs.append(client)
Since inready was accidentally modified, the else block was executed when it shouldn't have been.
This question is two-fold.
1. So I need to run code for a socket server that's all defined and created in another.py, Clicking run on PyCharm works just fine, but if you exec() the file it just runs the bottom part of the code.
There are a few answers here but they are conflicting and for Python 2.
From what I can gather there are three ways:
- Execfile(), Which I think is Python 2 code.
- os.system() (But I've seen it be said that it's not correct to pass to the OS for this)
- And subprocess.Popen (unsure how to use this either)
I need this to run in the background, it is used to create threads for sockets for the recv portion of the overall program and listen on those ports so I can input commands to a router.
This is the complete code in question:
import sys
import socket
import threading
import time
QUIT = False
class ClientThread(threading.Thread): # Class that implements the client threads in this server
def __init__(self, client_sock): # Initialize the object, save the socket that this thread will use.
threading.Thread.__init__(self)
self.client = client_sock
def run(self): # Thread's main loop. Once this function returns, the thread is finished and dies.
global QUIT # Need to declare QUIT as global, since the method can change it
done = False
cmd = self.readline() # Read data from the socket and process it
while not done:
if 'quit' == cmd:
self.writeline('Ok, bye. Server shut down')
QUIT = True
done = True
elif 'bye' == cmd:
self.writeline('Ok, bye. Thread closed')
done = True
else:
self.writeline(self.name)
cmd = self.readline()
self.client.close() # Make sure socket is closed when we're done with it
return
def readline(self): # Helper function, read up to 1024 chars from the socket, and returns them as a string
result = self.client.recv(1024)
if result is not None: # All letters in lower case and without and end of line markers
result = result.strip().lower().decode('ascii')
return result
def writeline(self, text): # Helper func, writes the given string to the socket with and end of line marker at end
self.client.send(text.strip().encode("ascii") + b'\n')
class Server: # Server class. Opens up a socket and listens for incoming connections.
def __init__(self): # Every time a new connection arrives, new thread object is created and
self.sock = None # defers the processing of the connection to it
self.thread_list = []
def run(self): # Server main loop: Creates the server (incoming) socket, listens > creates thread to handle it
all_good = False
try_count = 0 # Attempt to open the socket
while not all_good:
if 3 < try_count: # Tried more than 3 times without success, maybe post is in use by another program
sys.exit(1)
try:
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # Create the socket
port = 80
self.sock.bind(('127.0.0.1', port)) # Bind to the interface and port we want to listen on
self.sock.listen(5)
all_good = True
break
except socket.error:
print('Socket connection error... Waiting 10 seconds to retry.')
del self.sock
time.sleep(10)
try_count += 1
print('Server is listening for incoming connections.')
print('Try to connect through the command line with:')
print('telnet localhost 80')
print('and then type whatever you want.')
print()
print("typing 'bye' finishes the thread. but not the server",)
print("eg. you can quit telnet, run it again and get a different ",)
print("thread name")
print("typing 'quit' finishes the server")
try:
while not QUIT:
try:
self.sock.settimeout(0.500)
client = self.sock.accept()[0]
except socket.timeout:
time.sleep(1)
if QUIT:
print('Received quit command. Shutting down...')
break
continue
new_thread = ClientThread(client)
print('Incoming Connection. Started thread ',)
print(new_thread.getName())
self.thread_list.append(new_thread)
new_thread.start()
for thread in self.thread_list:
if not thread.isAlive():
self.thread_list.remove(thread)
thread.join()
except KeyboardInterrupt:
print('Ctrl+C pressed... Shutting Down')
except Exception as err:
print('Exception caught: %s\nClosing...' % err)
for thread in self.thread_list:
thread.join(1.0)
self.sock.close()
if "__main__" == __name__:
server = Server()
server.run()
print('Terminated')
Notes:
This is created in Python 3.4
I use Pycharm as my IDE.
One part of a whole.
2. So I'm creating a lightning detection system and this is how I expect it to be done:
- Listen to the port on the router forever
The above is done, but the issue with this is described in question 1.
- Pull numbers from a text file for sending text message
Completed this also.
- Send http get / post to port on the router
The issue with this is that i'm unsure how the router will act if I send this in binary form, I suspect it wont matter, the input commands for sending over GSM are specific. Some clarification may be needed at some point.
- Recieve reply from router and exception manage
- Listen for relay trip for alarm on severe or close strike warning.
- If tripped, send messages to phones in storage from text file
This would be the http get / post that's sent.
- Wait for reply from router to indicate messages have been sent, exception handle if it's not the case
- Go back to start
There are a few issues I'd like some background knowledge on that is proving hard to find via the old Google and here on the answers in stack.
How do I grab the receive data from the router from another process running in another file? I guess I can write into a text file and call that data but i'd rather not.
How to multi-process and which method to use.
How to send http get / post to socket on router, post needed occording to the router manual is as follows: e.g. "http://192.168.1.1/cgi-bin/sms_send?number=0037061212345&text=test"
Notes: Using Sockets, threading, sys and time on Python 3.4/Pycharm IDE.
Lightning detector used is LD-250 with RLO Relay attached.
RUT500 Teltonica router used.
Any direction/comments, errors spotted, anything i'm drastically missing would be greatly appreciated! Thank you very much in advance :D constructive criticism is greatly encouraged!
Okay so for the first part none of those suggested in the OP were my answer. Running the script as is from os.system(), exec() without declaring a new socket object just ran from __name__, this essentially just printed out "terminated", to get around this was simple. As everything was put into a classes already, all I had to do is create a new thread. This is how it was done:
import Socketthread2
new_thread = Socketthread2.Server() # Effectively declaring a new server class object.
new_thread.run()
This allowed the script to run from the beginning by initialising the code from the start in Socket, which is also a class of Clientthread, so that was also run too. Running this at the start of the parent program allowed this to run in the background, then continue with the new code in parent while the rest of the script was continuously active.