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server.py
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import socket
import subprocess
import threading
import os
import signal
from sys import platform
import sys
import base64
class serverType:
clients_dict = {}
PORT = 5050
DISCONNECT_MESSAGE = "exit"
IP = ''
server_name = ''
server = ''
def __init__(self):
if platform == "linux" or platform == "linux2":
os.system('clear')
cmd = "ip -4 addr | grep -oP '(?<=inet\\s)\\d+(\\.\\d+){3}'"
IPoutput = subprocess.check_output(cmd, shell=True).decode('utf-8').strip()
IPs = IPoutput.split("\n")
if len(IPs) == 1:
self.IP = IPs[0]
else:
print("List of IPs to use for server:")
for i in range(len(IPs)):
print("[{}] {}".format(i+1, IPs[i]))
choice = input("\nChoose an option [{} - {}]: ".format(1,len(IPs)))
try:
choice = int(choice)-1
if choice < 0 or choice > len(IPs)-1:
print("Invalid choice, defaulting to", IPs[0])
self.IP = IPs[0]
else:
self.IP = IPs[choice]
except:
print("Invalid choice, defaulting to", IPs[0])
self.IP = IPs[0]
print("Server will be running at", self.IP)
elif platform == "darwin":
os.system("clear")
cmd = "ifconfig | grep -oE \"\\binet ([0-9]{1,3}\\.){3}[0-9]{1,3}\\b\" | awk '{print $2}'"
IPoutput = subprocess.check_output(cmd, shell=True).decode('utf-8').strip()
IPs = IPoutput.split("\n")
if len(IPs) == 1:
self.IP = IPs[0]
else:
print("Select IP to use for server 0 to", len(IPs)-1)
for i in range(len(IPs)):
print("[{}] {}".format(i, IPs[i]))
choice = input()
try:
choice = int(choice)
if choice < 0 or choice > len(IPs)-1:
print("Invalid choice, defaulting to", IPs[0])
self.IP = IPs[0]
else:
self.IP = IPs[choice]
except:
print("Invalid choice, defaulting to", IPs[0])
self.IP = IPs[0]
print("Server will be running at", self.IP)
elif platform == "win32":
os.system('cls')
self.IP = socket.gethostbyname(socket.gethostname())
else:
print('Unsupported OS')
exit(1)
self.mainFunc()
def getName(self):
self.server_name = input("\nEnter server name : ")
while not self.server_name.isalpha():
print(" \n \t ERROR: The Server name should only contain a set of alphabets. \n")
self.server_name = input('Enter server name : ')
self.clients_dict['Server'] = self.server_name
def encodefunc(self, val):
encoded_data = base64.b64encode(bytes(val, 'utf-8'))
print("\n\n-------- {}'s Chat-Room accesskey : ( {} ) --------".format(self.server_name, encoded_data.decode('utf-8')))
def getpasskey(self, str1):
if str1[0:7] == '192.168':
self.encodefunc(str1[7:].zfill(8))
else:
self.encodefunc(str1.zfill(15))
def broadcast(self, message, current_client):
send_client_list = [x for x in list(
self.clients_dict.keys()) if x != current_client and x != 'Server']
for client in send_client_list:
try:
client.send(message)
except:
print('\n \t Could not send message \n')
def rec_message(self, client):
while True:
try:
message = client.recv(1024).decode('utf-8')
if message == self.DISCONNECT_MESSAGE:
user = self.clients_dict[client]
print('\n \t [{}] disconnected \n'.format(user))
del self.clients_dict[client]
client.close()
self.broadcast('\n \t [{}] left! \n'.format(user).encode('utf-8'), client)
break
## Receiving images and files
elif message.startswith('image:'):
fname,fsize = message[7:].split()
fpath='Proximity_images'
if not os.path.exists(fpath):
os.mkdir(fpath)
fsize = int(fsize)
c=0
k=(fsize//512)*512
fname1 = fpath+'/'+fname
try:
with open(fname1,"wb") as f:
while True:
chunk=client.recv(512)
if not chunk:
break
f.write(chunk)
c+=512
if c==k:
break
if fsize-k:
chunk=client.recv(fsize-k+1)
f.write(chunk)
print('Received Image successfully')
except:
print("An error occurred!")
elif message.startswith("file:"):
fname, fsize = message[5:].split(";")
fname = os.path.basename(fname)
fsize = int(fsize)
if not os.path.exists('Proximity_files'):
os.mkdir('Proximity_files')
fname1 = 'Proximity_files/' + fname
try:
with open(fname1, "wb") as f:
bytes_read = client.recv(fsize)
f.write(bytes_read)
print(f"File {fname} received ")
except:
print("An error occurred!")
else:
print('\t\t\t\t', message)
self.broadcast(message.encode('utf-8'), client)
except:
user = self.clients_dict[client]
print('\n \t [{}] disconnected \n'.format(user))
client.close()
del self.clients_dict[client]
self.broadcast('\n \t [{}] left! \n'.format(user).encode('utf-8'), client)
break
def send_message(self):
while True:
try:
message = input('')
b_message = "[{}] : {}".format(self.server_name, message)
if message == self.DISCONNECT_MESSAGE:
self.broadcast('Server left'.encode('utf-8'), 'Server')
os._exit(0)
## Sending images and files
elif message.startswith('image:'):
fname = message[6:]
fsize = os.path.getsize(fname)
iname=os.path.basename(fname)
message='image: '+iname+' '+str(fsize)
self.broadcast(message.encode('utf-8'),'Server')
k=(fsize//512)*512
c=0
try:
with open(fname,"rb") as f:
while True:
chunks = f.read(512)
if not chunks:
break
c+=512
self.broadcast(chunks,'Server')
if c==k:
break
if fsize-k:
chunks=f.read(fsize-k+1)
self.broadcast(chunks,'Server')
print('Sent Image successfully')
except:
print("An error occurred!")
elif message.startswith("file:"):
fname=message[5:]
fsize=os.path.getsize(fname)
message = message+";"+str(fsize)
self.broadcast(message.encode('utf-8'), 'Server')
try:
with open(fname, "rb") as f:
bytes_read = f.read(fsize)
self.broadcast(bytes_read, 'Server')
print("File sent")
except:
print("An error occurred!")
else:
self.broadcast(b_message.encode('utf-8'), 'Server')
except:
print('\n \t Error Occurred while Reading input \n')
# self.broadcast('Server left'.encode('utf-8'), 'Server')
# os._exit(0)
def accept_conn(self):
while True:
client, address = self.server.accept()
client.send('Connect'.encode('utf-8'))
client_name = client.recv(1024).decode('utf-8')
final_client_name = client_name
i = 1
while final_client_name in self.clients_dict.values():
final_client_name = "{}{}".format(client_name, i)
i += 1
if client_name != final_client_name:
message = ('\n \t Username updated to ['+final_client_name+']').encode('utf-8')
client.send(message)
self.clients_dict[client] = final_client_name
print("\n \t [{}] joined the server \n".format(self.clients_dict[client]))
self.broadcast("\n \t [{}] joined! \n".format(self.clients_dict[client]).encode('utf-8'), client)
client.send("Connected to [{}]!".format(self.server_name).encode('utf-8'))
thread = threading.Thread(target=self.rec_message, args=(client,))
thread.start()
#print('Active threads : ' + str(threading.active_count()-1))
def keyboardInterruptHandler(self, signal, frame):
print('Interrupted')
self.broadcast('Server left'.encode('utf-8'), 'Server')
os._exit(0)
def mainFunc(self):
self.getName()
self.getpasskey(self.IP)
self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.server.bind((self.IP, self.PORT))
self.server.listen()
signal.signal(signal.SIGINT, self.keyboardInterruptHandler)
thread2 = threading.Thread(target=self.send_message)
thread2.start()
print("Server created Successfully!\n")
self.accept_conn()
s1 = serverType()