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Client.py
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Client.py
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import socket
import os
import struct
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
class MyHandler(FileSystemEventHandler):
def on_modified(self, event):
print ("\nFile was modified in {}! Please sync again to update your files.\n".format(event))
def on_created(self, event):
print("\n{} was modified. Please sync again to update your files.\n".format(event.src_path))
class Node:
def __init__(self, data):
self.data = data
def send_filename(filename, sock):
data_length = str(len(filename.encode()))
print("Data Length: ", data_length)
length_pad = data_length
for i in range (20 - len(data_length)):
length_pad = '0' + data_length
msg = struct.pack('>I', int(length_pad)) + filename.encode()
print("Message: ", msg)
print("Message length: ", len(msg))
sock.sendall(msg)
def recv_msg(sock):
# Read message length and unpack it into an integer
raw_msglen = recvall(sock, 4)
if not raw_msglen:
return None
msglen = struct.unpack('>I', raw_msglen)[0]
# print("Message length: ", msglen)
# Read the message data
return recvall(sock, msglen)
def recvall(sock, n):
# Helper function to recv n bytes or return None if EOF is hit
# print("n: ", n)
data = b''
while len(data) < n:
# print("Data length in loop: ", len(data))
packet = sock.recv(n - len(data))
if not packet:
return None
data += packet
# print("Data length end loop: ", len(data))
# print("Data extracted: ", data)
# print("data length: ", len(data))
return data
def send_fileData(filename, sock):
dir = 'Files/'
fp = open(dir + filename, 'rb')
fp_data = fp.read()
data_length = str(os.path.getsize(dir+filename))
length_pad = data_length
for i in range(20 - len(data_length)):
data_length = '0' + data_length
print("Data Length: ", data_length)
print("OS Data Length: ", data_length)
msg = struct.pack('>I', int(length_pad)) + fp_data
print("Message: ", msg)
print("Message length: ", msg)
print("fpData: ", fp_data)
sock.sendall(msg)
def sync(sock):
print("syncing")
dir = 'Files/'
files = [f for f in os.listdir(dir) if os.path.isfile(os.path.join(dir, f))]
print("List of file in {0}: ".format(dir),str(files) )
# files = ['frame.png', 'test1.txt', 'test3.txt', 'test.txt', 'data.pdf', 'new.mp3']
num = len(files)
num = str(num)
print("Numfiles: ", num)
for i in range (3 - len(num)):
num = '0' + num
print("Final num: ", num)
sock.send(num.encode())
for filename in files:
send_filename(filename, sock)
ack = sock.recv(36)
print(ack.decode())
send_fileData(filename, sock)
ack = sock.recv(36)
print(ack.decode())
print("__________________________________________\n")
def save_file(filename, data):
dir = "downloads/"
fp = open(dir+filename, 'wb')
fp.write(data)
print("\nSaved {} in downloads.\n".format(filename))
def Main():
event_handler = MyHandler()
observer = Observer()
observer.schedule(event_handler, path='Files/', recursive=False)
observer.start()
host = '127.0.0.2'
port = 5000
print("The server has started. Type sync to connect and get started.")
# The four commands are sync, quit, qury and retr
message = input("Enter command -> ")
while message != 'q':
s = socket.socket()
s.connect(('127.0.0.1', port))
conn = s.recv(60)
print(conn.decode())
s.send(message.encode())
if str(message) == "sync":
sync(s)
elif str(message) == "quit":
break
elif str(message) == "retr":
req = s.recv(30)
print(req.decode())
query = input(req.decode())
s.send(query.encode())
res = s.recv(5)
print("Result: ", res)
if res.decode() == "True":
print("Downloading your file...")
file_data = recv_msg(s)
print("\n\nDownloaded size: ", len(file_data))
while True:
ch = input("Do you want to save it? (y/n) ")
if ch.lower() == "y":
save_file(query, file_data)
break
else:
break
else:
res = s.recv(5)
print("Sorry, file could not be found in the server.")
data = s.recv(1000)
print (data.decode())
print("\n____________________________\nClosing connection.\n")
s.close()
message = input("Enter command -> ")
# time.sleep(5)
# s.close()
observer.stop()
observer.join()
if __name__ == '__main__':
Main()