Update and Edit my #server$-$s$.$py$$to meet this requirements:

Server gracefully handles SIGINT$$signal

Server accepts a connection

Server accepts a connection and sends accio$\backslash$r

$$command

Server starts receiving data

Server accepts another connection after the first connection finished

When server receives $10$ connections simultaneously, it accepts and process them sequentially without rejecting

Server aborts connection and prints ERROR when it does not receive data from client for more than $10$ seconds.

Server accepts another connection after the first connection timed out

Server successfully receives a small amount of data $($~$500$ bytes$)$ using the instructor$$s version of the client

Server prints the correct value for the received data from the previous test

Server successfully receives a large amount of data $($~$10$ MiBytes$)$ using the instructor$$s version of the client $($without emulated delays and$/$or transmission errors$)$

Server prints the correct value for the received data from the previous test

Server successfully receives a large amount of data $($~$10$ MiBytes$)$ using the instructor$$s version of the client $($with$$emulated delays and$/$or transmission errors$)$

Server prints the correct value for the received data from the previous test

#client.py

import sys

import socket

def connectTcp$($host$,$ port$)$:

$$ sock $=$ socket.socket$($socket$.$AF$\_$INET, socket.SOCK$\_$STREAM$)$

$$ sock.settimeout$(10)$

$$ try:

$$ sock.connect$(($host$,$ port$))$

$$ except socket.gaierror:

$$ sys$.$stderr.write$("$ERROR: Invalid hostname or service not known

$")$

$$ sys$.$exit$(1)$

$$ except socket.timeout:

$$ sys$.$stderr.write$("$ERROR: Connection attempt timed out

$")$

$$ sys$.$exit$(1)$

$$ except socket.error as e:

$$ sys$.$stderr.write$($f$"$ERROR: $\{$e$\}$

$")$

$$ sys$.$exit$(1)$

$$ return sock

def receive$\_$commands$\_$and$\_$confirm$($sock$)$:

$$ expected$\_$command $=$ b$"$accio$\backslash$r

$"$

$$ command$\_$buffer $=$ b$""$

$$ commands$\_$received $=0$

$$ while commands$\_$received $<2$:

$$ data $=$ sock.recv$(1)$

$$ if not data:

$$ sys$.$stderr.write$("$ERROR: Server closed the connection unexpectedly

$")$

$$ sys$.$exit$(1)$

$$ command$\_$buffer $+=$ data

$$ if command$\_$buffer.endswith$($expected$\_$command$)$:

$$ if commands$\_$received $==0$:

$$ sock.sendall$($b$"$confirm$-$accio$\backslash$r

$")$

$$ elif commands$\_$received $==1$:

$$ sock.sendall$($b$"$confirm$-$accio$-$again$\backslash$r

$")$

$$ sock.sendall$($b$"\backslash$r

$")$

$$ commands$\_$received $+=1$

$$ command$\_$buffer $=$ b$""$

def send$\_$file$($sock$,$ filename$)$:

$$ with open$($filename$,\text{'}$rb$\text{'})$ as file:

$$ file$\_$data $=$ file.read$()$

$$ sock.sendall$($file$\_$data$)$

def main$()$:

$$ if len$($sys$.$argv$)!=4$:

$$ sys$.$stderr.write$("$ERROR: Usage:

$")$

$$ sys$.$exit$(1)$

$$ host $=$ sys$.$argv$[1]$

$$ try:

$$ port $=$ int$($sys$.$argv$[2])$

$$ except ValueError:

$$ sys$.$stderr.write$("$ERROR: Port must be an integer

$")$

$$ sys$.$exit$(1)$

$$ if not $(0<=$ port $<=65535)$:

$$ sys$.$stderr.write$("$ERROR: Port number must be in the range $0-65535$

$")$

$$ sys$.$exit$(1)$

$$ filename $=$ sys$.$argv$[3]$

$$ try:

$$ sock $=$ connectTcp$($host$,$ port$)$

$$ receive$\_$commands$\_$and$\_$confirm$($sock$)$

$$ send$\_$file$($sock$,$ filename$)$

$$ print$("$File transfer successful"$)$

$$ sock.close$()$

$$ except Exception as e:

$$ sys$.$stderr.write$($f$"$ERROR: $\{$e$\}$

$")$

$$ sys$.$exit$(1)$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

$$ main$()$

#server$-$s$.$py

from socket import $*$

import sys

import signal

import os

# Signal handler for graceful shutdown

def signal$\_$handler$($signum$,$ frame$)$:

$$ sys$.$exit$(0)$

# Set up and return the server socket

def setup$\_$server$\_$socket$($port$)$:

$$ server$\_$socket $=$ socket$($AF$\_$INET, SOCK$\_$STREAM$)$

$$ server$\_$socket.bind$((\text{'}0\mathrm{.}0\mathrm{.}0\mathrm{.}0\text{'},$ port$))$# Bind to all interfaces

$$ server$\_$socket.listen$(10)$# Set up queue for up to $10$ connections

$$ return server$\_$socket

# Handle the process of receiving a file

def receive$\_$file$($connection$\_$socket$)$:

$$ try:

$$ header $=$ connection$\_$socket.recv$(10)$# assuming header size is $10$ bytes

$$ filesize $=$ int.from$\_$bytes$($header$,$ byteorder$=$'big'$)$

$$ bytes$\_$received $=0$

$$ filename $=$ "received$\_$file.txt$"$# Change the filename as needed

$$ with open$($filename$,\text{'}$wb$\text{'})$ as file:

$$ while bytes$\_$received $<$ filesize:

$$ data $=$ connection$\_$socket.recv$($min$(1024,$ filesize $-$ bytes$\_$received$))$

$$ if not data:

$$ raise Exception$("$Client closed the connection unexpectedly"$)$

$$ file.write$($data$)$

$$ bytes$\_$received $+=$ len$($data$)$

$$ print$($f$"$File received: $\{$filename$\},$ Size: $\{$bytes$\_$received$\}$ bytes"$)$

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