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Tkinter socket sending data error while opening the server and client

Got an error of: A request to send or receive data was disallowed because the socket is not connected and (when sending on a datagram socket using a sendto call) no address was supplied when using socket with tkinter on login between server and client
Server :
import socket
import pickle
import datetime
# Socket settings
my_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # socket setting
my_socket.bind(('0.0.0.0', 1024)) # binding the server ip
my_socket.listen(10) # how much people can join the server
client_socket, client_address = my_socket.accept() # accepting the people if the server is available
print("Server Open") # prints that the server is open
# Functions
def get_users():
# get from the login_users.txt all users & passwords
# format in file - username|password
logs = []
with open('login_users.txt', 'r') as f:
for line in f:
cur = line.strip('\n\r')
cur = cur.split("|")
logs.append(cur)
f.close()
return logs
def get_rank(user):
# get from the ranks.txt all users & passwords
# format in file - username|password
ranks = []
with open('ranks.txt', 'r') as f:
for line in f:
cur = line.strip('\n\r')
cur = cur.split("|")
ranks.append(cur)
f.close()
for r in ranks:
if r[0] == user:
return r[1]
def add_to_logs(user, line):
# add attempt to record (logs_.txt)
now = datetime.datetime.now()
with open('logs_.txt', 'a') as f:
f.write(line + " " + str(now) + "\n")
f.close()
def user_exist(user):
for log in logs:
if log[0] == user:
return True
def check(user, password):
# check the password that the user typed
# if there are 3 failed tried disable the login button
global logs
global atmp
global null_state
global login_state
global logged_user
global status
# get text from boxes:
user = user.get()
password = password.get()
print("user: ", user)
print("pass: ", password)
# add attempt to logs_ file
add_to_logs(user, f"{user} has tried to log in.")
atmp += 1
if user_exist(user):
null_state = False
for log in logs:
if log[0] == user and log[1] == password:
# pop up login succeed
login_state = True
logged_user = user
status = True
if __name__ == '__main__':
btpressed = pickle.loads(my_socket.recv(1024))
if btpressed:
client_socket.send(pickle.dumps([status]))
username, password = pickle.loads(my_socket.recv(1024)) # Getting data from the server
status = check(username, password)
print(status)
client:
import socket
import pickle
import tkinter as tk
import tkinter.messagebox as mb
import tkinter.font as tkFont
user_send = "nothing"
pass_send = "nothing"
# Socket settings
my_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # setting the socket
my_socket.connect(('127.0.0.1', 1024)) # joining the server
print("Connected to the server successfully!")
def check_null(user, password):
global null_state
# check for the username and password in the file:
if user == "" or password == "" or user == "" and password == "":
null_state = True
fail_msg = "Please make sure you have entered username and password in both fields!"
mb.showinfo(title="Enter username and password", message=fail_msg)
#def display_system():
#root1.title("Secure4U")
#root1.geometry("1200x600")
#fontStyle = tkFont.Font(family="Lucida Grande", size=20)
#show_user_logged = tk.Label(root1, text="Hello " + logged_user + ",", font=fontStyle)
#show_user_logged.pack(side="top", anchor="nw")
#user_rank =
#show_user_rank = tk.Label(root1, text="Rank: " + str(user_rank), font=fontStyle)
#show_user_rank.pack(side="top", anchor="nw")
#root1.mainloop() # run tkinter display
def display_login():
global log_button
# initiate and display all objects on screen
root.title("Secure4U Login")
root.geometry("450x250")
fontStyle = tkFont.Font(family="Lucida Grande", size=20)
# user name
user_label = tk.Label(root, text="Username:", font=fontStyle)
# user_box = tk.Text(root, bg="grey", height=1, width=20, font=fontStyle)
user_box = tk.Entry(root, bg="grey", font=fontStyle)
user_label.pack()
user_box.pack()
# password
pass_label = tk.Label(root, text="Password:", font=fontStyle)
# pass_box = tk.Text(root, bg="grey", font=fontStyle)
pass_box = tk.Entry(root, bg="grey", font=fontStyle, show="*")
pass_label.pack()
pass_box.pack()
# login button
log_button = tk.Button(root, text='Login', height=2, width=20, command=lambda:(button_pressed()))
log_button.pack()
user_send = user_box
pass_send = pass_box
root.mainloop() # run tkinter display
def button_pressed():
BtPressed = True
if __name__ == '__main__':
global BtPressed
BtPressed = False
status = False
my_socket.send(pickle.dumps([BtPressed]))
if not status:
null_state = False # checks if the user entered null data on one or both of the fields
root = tk.Tk()
display_login()
if BtPressed:
my_socket.send(pickle.dumps([user_send, pass_send])) # Sending data to the server
status = pickle.loads(my_socket.recv(1024)) # Getting data from the server
# success_msg = f"Hello {logged_user}, you logged in successfully!"
# mb.showinfo(title="login succeed!", message=success_msg)
I don't know what it happened and I tried everything, please help me if you can
Thank you :)

Decoding data sent through a TCP socket in Python

I have a basic program where in a Tkinter window a user presses a button that generates a string in a listbox. Using a second send button, I want to transfer those strings through a socket server to a second client. The message printed to the console at the point of departure (client1) is a tuple, and it can be iterated through with a for loop to make it more legible i.e. each element is printed to a new line. Using a print function at the point of arrival (client2), the same tuple is produced, but trying to use a for loop on it iterates through each character in the group of strings, as opposed to each element of the tuple as desired.
This is client1:
from socket import AF_INET, socket, SOCK_STREAM
from threading import Thread
from tkinter import messagebox
from tkinter import scrolledtext
from tkinter import ttk
from tkinter import font
import os
import datetime
import pickle
def receive():
while True:
try:
msg = client_socket.recv(BUFSIZ).decode("utf8")
except OSError: # Possibly client has left the chat.
break
def send(event=None): # event is passed by binders.
global sent
global current_datetime
global order_list
sent = order_list.get(0, END)
msg = sent
for i in msg:
print(i)
client_socket.send(bytes(str(msg), "utf8"))
if msg == "{quit}":
client_socket.close()
window.quit()
order_list.delete(0, END)
window = tkinter.Tk()
window.title("Title")
window.geometry("1280x1080")
var = IntVar()
var.set(1)
check_Table_Button = False
font = font.Font(family="Arial", size=9, weight="bold")
height = 4
width = 7
padx = 8
pady = 1
order_list=Listbox(window, width=35, height = 35)
order_list.config(font=font)
order_list.grid(row =0, column = 11, columnspan=3, rowspan=8)
def clickedTable(table):
# print(table)
order_list.insert(END, table)
global check_Table_Button
check_Table_Button = True
def addTable(table, number, x) #Sample Button to generate string
table = table
btn_masa_x = Button(window, text=str(table),font=font,
bg="orange", fg="black",
command=lambda: clickedTable(table),
height=height, width=width,
padx=padx+1, pady=pady)
btn_masa_x.grid(column=x, row=number, rowspan=1, columnspan=1)
addTable("Table 1 ", 0, 0)
def send_button():#Second button to send over socket
send_button =Button(window, text="Send",
font=font, bg="lime green",
command=lambda: send(),
height=height, width=width,
padx=padx, pady=pady)
send_button.grid(column=10, row = 8, rowspan=1)
send_button()
HOST = "127.0.0.1"
PORT = 33000
BUFSIZ = 1024
ADDR = (HOST, PORT)
client_socket = socket(AF_INET, SOCK_STREAM)
client_socket.connect(ADDR)
receive_thread = Thread(target=receive)
receive_thread.start()
window.mainloop()
This is the server:
from socket import AF_INET, socket, SOCK_STREAM
from threading import Thread
def accept_incoming_connections():
"""Sets up handling for incoming clients."""
while True:
client, client_address = SERVER.accept()
print("%s:%s has connected." % client_address)
# client.send(bytes("Greetings from the cave! Now type your name and press enter!", "utf8"))
addresses[client] = client_address
Thread(target=handle_client, args=(client,)).start()
def handle_client(client): # Takes client socket as argument.
"""Handles a single client connection."""
name = client.recv(BUFSIZ).decode("utf8")
# welcome = 'Welcome %s! If you ever want to quit, type {quit} to exit.' % name
# client.send(bytes(welcome, "utf8"))
msg = "%s has joined the chat!" % name
# broadcast(bytes(msg, "utf8"))
clients[client] = name
while True:
msg = client.recv(BUFSIZ)
if msg != bytes("{quit}", "utf8"):
broadcast(msg)
# broadcast(msg, name + ": ")
else:
client.send(bytes("{quit}", "utf8"))
client.close()
del clients[client]
broadcast(bytes("%s has left the chat." % name, "utf8"))
break
def broadcast(msg, prefix=""): # prefix is for name identification.
"""Broadcasts a message to all the clients."""
for sock in clients:
sock.send(bytes(prefix, "utf8") + msg)
clients = {}
addresses = {}
HOST = '127.0.0.1'
PORT = 33000
BUFSIZ = 1024
ADDR = (HOST, PORT)
SERVER = socket(AF_INET, SOCK_STREAM)
SERVER.bind(ADDR)
if __name__ == "__main__":
SERVER.listen(5)
print("Waiting for connection...")
ACCEPT_THREAD = Thread(target=accept_incoming_connections)
ACCEPT_THREAD.start()
ACCEPT_THREAD.join()
SERVER.close()
And this is client2:
from threading import Thread
import tkinter
import pickle
def receive():
"""Handles receiving of messages."""
while True:
try:
msg =client_socket.recv(BUFSIZ)#.decode("utf-8")
msg = pickle.loads(msg)
print(msg)
# msg_list.insert(tkinter.END,msg)
except OSError: # Possibly client has left the chat.
break
def send(event=None): # event is passed by binders.
"""Handles sending of messages."""
msg = my_msg.get()
my_msg.set("") # Clears input field.
client_socket.send(bytes(msg, "utf8"))
if msg == "{quit}":
client_socket.close()
top.quit()
def on_closing(event=None):
"""This function is to be called when the window is closed."""
my_msg.set("{quit}")
send()
top = tkinter.Tk()
top.title("Chatter")
messages_frame = tkinter.Frame(top)
my_msg = tkinter.StringVar() # For the messages to be sent.
scrollbar = tkinter.Scrollbar(messages_frame) # To navigate through past messages.
# Following will contain the messages.
msg_list = tkinter.Listbox(top,width=40,height=10)
msg_list.pack(side=tkinter.LEFT, fill=tkinter.BOTH)
messages_frame.pack()
entry_field = tkinter.Entry(top, textvariable=my_msg)
entry_field.bind("<Return>", send)
entry_field.pack()
send_button = tkinter.Button(top, text="Send", command=send)
send_button.pack()
top.protocol("WM_DELETE_WINDOW", on_closing)
#----Now comes the sockets part----
# HOST = input('Enter host: ')
HOST = "127.0.0.1"
# PORT = input('Enter port: ')
PORT = 33000
if not PORT:
PORT = 33000
else:
PORT = int(PORT)
BUFSIZ = 1024
ADDR = (HOST, PORT)
client_socket = socket(AF_INET, SOCK_STREAM)
client_socket.connect(ADDR)
receive_thread = Thread(target=receive)
receive_thread.start()
tkinter.mainloop()
As I said above, the msg variable in client2, the one that receives the message, is printed as a tuple but a for loop will iterate over each character of the strings contained.
Using the pickle module I received two separate errors.
When I pass .decode("utf-8) and then .loads() it says "Could not find MARK).
Without the .decode(), the error is "unpickling stack underflow".
My desired outcome is for each of the individual strings that arrive over the TCP socket to be added to the listbox in client2 on a new line, and without the ('', '') symbols.
Should I try to convert it to a .json object?
Or will another networking module produce better results?
I'm sorry about the length of code and the potentially obvious answer. Beginner to networking.

python why I keep getting ValueError from select.select: file descriptor cannot be a negative integer (-1)

I try to make a simple tkinter GUI chatting interface using socket and select, however keep getting ValueError file descriptor cannot be a negative integer (-1) when connects to server.
it shows:
r,w,e = select.select(socket_list,[],[],0)
ValueError: file descriptor cannot be a negative integer (-1)
below is the full script for client:
from tkinter import *
import socket,select,sys,time
HOST = ''
PORT = 0
class Connection():
def __init__(self):
self.t1 = Toplevel()
self.scrollbar = Scrollbar(self.t1)
self.textbox = Text(self.t1,yscrollcommand=self.scrollbar.set)
self.e3 = Entry(self.t1)
self.b2 = Button(self.t1,text='close window',command=self.close_window)
self.s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
self.s.settimeout(2)
self.scrollbar.pack(side=LEFT,fill=Y)
self.textbox.pack()
self.e3.pack(fill=X)
self.b2.pack(side=BOTTOM,fill=X)
self.connect_server()
self.in_and_out()
def connect_server(self):
global HOST, PORT
try:
self.s.connect((str(HOST),int(PORT)))
except Exception as e:
print('Error with [%s,%s] Exception type: %s'% (HOST,PORT,e))
self.close_window()
def in_and_out(self):
while True:
root.update_idletasks()
root.update()
socket_list = [sys.stdin,self.s]
r,w,e = select.select(socket_list,[],[],0)
for sock in r:
if sock==self.s:
data=self.s.recv(4096).decode()
if not data:
print('disconnected from server.')
self.close_window()
else:
print(data)
self.textbox.insert(END,'>: %s\n'% data)
else:
name = self.s.getsockname()
self.e3.bind("<Return>",self.enter_pressed)
def enter_pressed(self):
msg = self.e3.get()
self.textbox.insert(END,">: %s\n"% msg)
self.s.send(msg.encode())
self.e3.delete(0,'end')
def close_window(self):
self.s.close()
self.t1.destroy()
def try_linking():
global HOST, PORT
HOST = s1.get()
PORT = i1.get()
print(HOST,PORT)
conn = Connection()
root = Tk()
l1 = Label(root,text='Host:')
l2 = Label(root,text='Port:')
s1 = StringVar()
i1 = IntVar()
e1 = Entry(root,textvariable=s1)
e2 = Entry(root,textvariable=i1)
s1.set('192.168.4.101')
i1.set(9009)
b1 = Button(root,text='Connect',command=try_linking)
l1.pack()
e1.pack()
l2.pack()
e2.pack()
b1.pack(fill=X)
if __name__=='__main__':
root.mainloop()
this script is supposed to start by entering the host and port then press try_link button then a chatting window pops up upon connection.
please advise and thank you

running file opening dialog of server using tkFileDialog on client

I am trying to make a simple system to transfer a file from server to client.
I want to show the client a file open dialog using tkFileDialog.
The problem is when I run the client & server the dialog box gets opened in server rather than client. I thought about send the object of tkFileDialog via
con.send(str(tkFileDialog.askopenfilename(initialdir='~', title='Choose a text file/program')))
If someone could help me out with this it will be really helpful or if someone has a better idea to open server filesystem in client without ssh
The full code is
server.py:
import socket,os
import Tkinter,tkFileDialog,tkMessageBox
def startServer(portName,ip):
if portName != '' and ip != '':
tkMessageBox.showinfo('Server Started','Server running!!! ok will be enabled after transfer')
port = int(portName)
ipName = ip
sd = socket.socket()
sd.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) #reuse socket
sd.bind((ipName, port))
sd.listen(50)
con, addr = sd.accept()
print ' connection from ' + str(addr)
con.send(tkMessageBox.showinfo('connected', 'Connection Successful'))
while True:
con.send(str(tkFileDialog.askopenfilename(initialdir='~', title='Choose a text file/program')))
fileN = con.recv(1024)
if os.path.isfile(fileN):
con.send(tkMessageBox.showinfo('Process completed', 'Rerun server to transfer again'))
con.send('exists')
fileN = str(fileN)
#read contents
fd = open(fileN, 'r')
buff = fd.read()
print buff
print len(buff)
fd.close()
#send contents
con.send(str(len(buff)-1))
print con.recv(14) #acknowledgement of length received
con.send(buff)
break
else:
con.send(tkMessageBox.showerror('Failed', 'Select appropriate file'))
con.send('ne')
sd.close()
else:
tkMessageBox.showerror('Failed','Failed to start server. Give appropriate inputs')
def main():
root = Tkinter.Tk()
root.geometry('300x200')
root.title('Server')
ipLabel = Tkinter.Label(root,text='\nEnter IP Address of server\n')
portLabel = Tkinter.Label(root, text='\nEnter Port Address of server\n')
ipEntry = Tkinter.Entry(root)
portEntry = Tkinter.Entry(root)
connectButton = Tkinter.Button(root,
text='Run',
command=lambda: startServer(portEntry.get(), ipEntry.get())
)
ipLabel.pack()
ipEntry.pack()
portLabel.pack()
portEntry.pack()
connectButton.pack()
root.mainloop()
main()
the client.py:
import socket
import Tkinter,tkMessageBox
def establishConnection(ipEntry,portEntry,root):
if ipEntry != '' and portEntry != '':
port = int(portEntry)
ipName = str(ipEntry)
sd = socket.socket()
sd.connect((ipName, port))
# ack if connection established
sd.recv(1024)
while True:
#file select dialog
fileN = sd.recv(1024)
sd.send(fileN) #send file name to open
sd.recv(1024) #dialog after file selected or not
fileAck = sd.recv(6) #acknowledge if file correct
if fileAck == 'exists':
leng = int(sd.recv(10))
sd.send('length recieved')
buff = str(sd.recv(leng))
saveLabel = Tkinter.Label(root, text='\n\nSave with Name\n')
saveNameEntry = Tkinter.Entry(root)
saveButton = Tkinter.Button(root,
text='SAVE',
command=lambda: saveFile(saveNameEntry.get(), buff, root))
saveLabel.pack()
saveNameEntry.pack()
saveButton.pack()
break
sd.close()
def saveFile(fileN, buff, root):
fd = open(fileN, 'w')
fd.write(buff)
fd.close()
tkMessageBox.showinfo('Operation Complete','file saved as '+fileN)
root.destroy()
def main():
root = Tkinter.Tk()
root.geometry('300x600')
root.title('Client')
ipLabel = Tkinter.Label(root,text='\nEnter IP Address of server\n')
portLabel = Tkinter.Label(root, text='\nEnter Port Address of server\n')
ipEntry = Tkinter.Entry(root)
portEntry = Tkinter.Entry(root)
connectButton = Tkinter.Button(root,
text='Connect',
command=lambda: establishConnection(ipEntry.get(), portEntry.get(),root)
)
ipLabel.pack()
ipEntry.pack()
portLabel.pack()
portEntry.pack()
connectButton.pack()
root.mainloop()
main()

The file dialog works only for the system that opens it. You can't use it to pick files on a remote system.

Python - Chat 2nd client doesn't receive anything until it sends

Was trying to make a chat application written in Python, but for some reasons I don't know, when the 1st client sends data, it works but the 2nd or other client can't receive it until the other client tries to send a message and it works fine...
Here's my code for the client:
from Tkinter import *
from PIL import ImageTk, Image
from socket import *
from threading import Thread, Lock
import time
'#Connect to Server'
shutdown = False
host = "127.0.0.1"
port = 0
server = ("127.0.0.1", 12345)
s = socket(AF_INET, SOCK_DGRAM)
s.bind((host, port))
s.setblocking(0)
global alias
def sendmsg():
msg = alias + " : " + chatEntry.get("0.0", END).strip() + "\n"
#chatLog.config(state=NORMAL)
#chatLog.insert(END, msg)
chatEntry.delete(1.0, END)
#chatLog.config(state=DISABLED)
s.sendto(msg, server)
def recvmsg(name, sock):
while not shutdown:
try:
while True:
data = sock.recv(1024)
chatLog.config(state=NORMAL)
chatLog.insert(END, str(data))
chatLog.config(state=DISABLED)
print str(data)
except:
pass
alias = raw_input("Alias ==> ")
root = Tk()
'#Create a window'
frame = Frame(root, width=600, height=450, bg="black")
frame.pack()
'#Create a chat log'
chatLog = Text(root, font=("Determination Sans", 12))
chatLog.insert(END, "Connecting..... \n")
chatLog.config(state=DISABLED)
chatLog.place(x=13, y=13, width=425, height=329)
'#Create list of friends online'
friendsList = Text(root)
friendsList.config(state=DISABLED)
friendsList.place(x=445, y=13, width=142, height=329)
'#Create an entry where you can enter your message'
chatEntry = Text(root)
chatEntry.place(x=13, y=349, width=425, height=96)
'#Create a send button'
btnLogin = Button(root, text="SEND", command=sendmsg)
btnLogin.place(x=445, y=349, width=142, height=96)
'#Set it fixed, not resizable......'
root.resizable(width=FALSE, height=FALSE)
root.wm_title("Chat - Underchat")
Thread(target=recvmsg, args=("RecvThread", s)).start()
root.mainloop()
And here's my code for the server:
from socket import *
import time
'#Put IP here...'
'#Put Socket here...'
host = "127.0.0.1"
port = 12345
clients = []
s = socket(AF_INET, SOCK_DGRAM)
s.bind((host, port))
'#Set Blocking to 0 so it will accept basically everything'
s.setblocking(0)
quitting = False
print "server started....."
while not quitting:
try:
'#Receive 1024 bytes of data... Its basically 1KB :P '
data, addr = s.recvfrom(1024)
if "Quit" in str(data):
'#Quit if a specified string was detected...'
quitting = True
if addr not in clients:
'#If a new client was found, add them to the clients list'
clients.append(addr)
print time.ctime(time.time()) + str(addr) + ": :" + str(data)
for client in clients:
'#Send the data to all clients... This is a groupchat afterall :3'
s.sendto(data, client)
except:
'#Try again if something goes wrong.....'
pass
'#Close the connection when out of the loop'
s.close()
So any ideas? Thanks