Please edit and debug a server.py code in to complement with client.py and server$-$s$.$py below, here are the requirements:

Server handles incorrect port

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 and process $10$ connections simultaneously

Server aborts connection and write ERROR into corresponding file $($resetting any received content$)$ when it does not receive new data from client for more than $10$ seconds.

Server accepts another connection after the first connection timed out

Server successfully receives a small file $($~$500$ bytes$)$ using the submitted version of the client $($from part $1)$

Server correctly saves the file from the previous test

Server successfully receives a small file $($~$500$ bytes$)$ using the instructors version of the client

Server correctly saves the file from the previous test

Server successfully receives sequentially $10$ large files $($~$10$ MiBytes$)$ using the submitted version of the client $($from part $1)$ and saves all the files from the previous test in $1.$file, $2.$file, $10.$file

Same as previous but in parallel

Server successfully receives sequentially $10$ large files $($~$10$ MiBytes$)$ using the instructors version of the client $($from part $1)$ and saves all the files from the previous test in $1.$file, $2.$file, $10.$file

Same as previous but in parallel

Server successfully receives sequentially $10$ large files $($~$10$ MiBytes$)$ using the instructors version of the client $($from part $1)$ and saves all the files from the previous test in $1.$file, $2.$file, $10.$file $($with emulated delays and$/$or transmission errors$)$

Same as previous but in parallel

#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 "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 $*$

def receive$\_$file$($connectionSocket$)$:

try:

header $=$ connectionSocket.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 "Client closed the connection unexpectedly"$)$

file.write$($data$)$

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

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

except timeout:

print$("$ERROR: Timeout while receiving file"$)$

except Exception as e:

print$($f$"$ERROR: $\{$e$\}")$

def main$()$:

serverPort $=12000$

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

serverSocket.bind$((\text{'}\text{'},$ serverPort$))$

serverSocket.listen$(1)$

print$(\text{'}$The server is ready to receive'$)$

while True:

connectionSocket, addr $=$ serverSocket.accept$()$

with connectionSocket:

print$($f$"$Connected by $\{$addr$\}")$

receive$\_$file$($connectionSocket$)$

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

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

main$()$

#server.py

import sys

import os

import signal

import socket

import time

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

print$("$

Exiting..."$)$

sys$.$exit$(0)$

def receive$\_$file$($connectionSocket$,$ file$\_$dir, connection$\_$id$)$:

try:

filename $=$ os$.$path.join$($file$\_$dir, f$"\{$connection$\_$id$\}.$file"$)$

with open$($filename$,\text{'}$wb$\text{'})$ as "File received: $\{$filename$\},$ Size: $\{$os$.$path.getsize$($filename$)\}$ bytes"$)$

except socket.timeout:

print$($f$"$ERROR: Timeout while receiving file for connection $\{$connection$\_$id$\}")$

with open$($filename$,\text{'}$wb$\text{'})$ as "ERROR"$)$

except Exception as e:

print$($f$"$ERROR: $\{$e$\}")$

def main$()$:

if len$($sys$.$argv$)!=3$:

sys$.$stderr.write$("$ERROR: Usage: python$3$ server.py

$")$

sys$.$exit$(1)$

try:

port $=$ int$($sys$.$argv$[1])$

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$(1)$

file$\_$dir $=$ sys$.$argv$[2]$

if not os$.$path.isdir$($file$\_$dir$)$:

sys$.$stderr.write$("$ERROR: Specified directory does not exist

$")$

sys$.$exit$(1)$

signal.signal$($signal$.$SIGQUIT, signal$\_$handler$)$

signal.signal$($signal$.$SIGTERM, signal$\_$handler$)$

signal.signal$($signal$.$SIGINT, signal$\_$handler$)$

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

serverSocket.bind$((\text{'}0\mathrm{.}0\mathrm{.}0\mathrm{.}0\text{'},$ port$))$

serverSocket.listen$(10)$

print$($f$"$Server is listening on port $\{$port$\}...")$

connection$\_$id $=1$

while True:

connectionSocket, addr $=$ serverSocket.accept$()$

print$($f$"$Connected by $\{$addr$\},$ Connection ID: $\{$connection$\_$id$\}")$

connectionSocket.settimeout$(10)$

receive$\_$file$($connectionSocket$,$ file$\_$dir, connection$\_$id$)$