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onedir4_server.py
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onedir4_server.py
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#!/usr/bin/env python
'''
Author: Team 3 OneDir, CS 3240 At The University Of Virginia Spring 2014
Ty Dang, Sravan Tumuluri, Piyapath Siratarnsophon, Dylan Doggett
'''
import os
import optparse
from twisted.internet import protocol, reactor
from twisted.protocols import basic
from time import ctime
from common import COMMANDS, display_message, validate_file_md5_hash, get_file_md5_hash, read_bytes_from_file, clean_and_split_input
PORT = 8123
DIRECTORY = '/home/boom/PycharmProjects/OneDir'
import login_demo
clients = []
class FileTransferProtocol(basic.LineReceiver):
delimiter = '\n'
def connectionMade(self):
self.factory.clients.append(self)
self.file_handler = None
self.file_data = (DIRECTORY)
self.transport.write('Welcome to Onedir! \n')
self.transport.write('Need help? Try typing help\n')
self.transport.write('ENDMSG\n')
display_message(
'Connection from: %s (%d clients total)' % (self.transport.getPeer().host, len(self.factory.clients)))
def connectionLost(self, reason):
self.factory.clients.remove(self)
self.file_handler = DIRECTORY
self.file_data = (DIRECTORY)
display_message(
'Connection from %s lost (%d clients left)' % (self.transport.getPeer().host, len(self.factory.clients)))
def lineReceived(self, line):
global clients
display_message('Received the following line from the client [%s]: %s' % (self.transport.getPeer().host, line))
data = self._cleanAndSplitInput(line)
if len(data) == 0 or data == '':
return
user = data.pop()
command = data[0].lower()
if not command in COMMANDS:
self.transport.write('Invalid command\n')
self.transport.write('ENDMSG\n')
return
if command != 'login' and command != 'quit' and user not in clients:
self.transport.write('You must be logged in\n')
self.transport.write('ENDMSG\n')
return
if command == 'list':
self._send_list_of_files()
elif command == 'get':
try:
filename = data[1]
except IndexError:
self.transport.write('Missing filename\n')
self.transport.write('ENDMSG\n')
return
if not self.factory.files:
self.factory.files = self._get_file_list()
if not filename in self.factory.files:
self.transport.write('File with filename %s does not exist\n' % (filename))
self.transport.write('ENDMSG\n')
return
display_message('Sending file: %s (%d KB)' % (filename, self.factory.files[filename][1] / 1024))
self.transport.write('HASH %s %s\n' % (filename, self.factory.files[filename][2]))
self.setRawMode()
for bytes in read_bytes_from_file(os.path.join(self.factory.files_path, filename)):
self.transport.write(bytes)
self.transport.write('\r\n')
self.setLineMode()
elif command == 'put':
try:
filename = data[1]
file_hash = data[2]
#replace the '|' back with ' '
filename = filename.replace('|',' ')
file_hash = file_hash.replace('|',' ')
except IndexError:
self.transport.write('Missing filename or file MD5 hash\n')
self.transport.write('ENDMSG\n')
return
self.file_data = (filename, file_hash)
# Switch to the raw mode (for receiving binary data)
print 'Receiving file: %s' % (filename)
self.setRawMode()
elif command == 'help':
self.transport.write('Available commands:\n\n')
for key, value in COMMANDS.iteritems():
self.transport.write('%s - %s\n' % (value[0], value[1]))
self.transport.write('ENDMSG\n')
elif command == 'registry':
registry = login_demo.retrieve_login_info()
self.transport.write('username\t\tpassword\n')
for key, value in registry.iteritems():
self.transport.write('%s\t\t\t%s\n' % (key, value[0]))
self.transport.write('ENDMSG\n')
elif command == 'register':
username = data[1]
password = data[2]
answer = login_demo.register_user(username, password)
print answer
self.transport.write('%s\n' % answer)
self.transport.write('ENDMSG\n')
elif command == 'login':
global clients
if user in clients:
self.transport.write('%s is already logged in.\n' % user)
self.transport.write('ENDMSG\n')
else:
username = data[1]
password = data[2]
answer = login_demo.login(username, password)
if answer == "Logged In":
display_message(username)
clients.append(username)
print answer
print clients
self.transport.write('%s %s\n' % (answer, username))
self.transport.write('ENDMSG\n')
elif command == 'logout':
global clients
clients.remove(user)
self.transport.write('%s logged out of system\n' % user)
self.transport.write('ENDMSG\n')
elif command == 'quit':
self.transport.loseConnection()
def rawDataReceived(self, data):
filename = self.file_data[0]
file_path = os.path.join(self.factory.files_path, filename)
display_message('Receiving file chunk (%d KB)' % (len(data)))
if not self.file_handler:
self.file_handler = open(file_path, 'wb')
if data.endswith('\r\n'):
# Last chunk
data = data[:-2]
self.file_handler.write(data)
self.setLineMode()
self.file_handler.close()
self.file_handler = None
if validate_file_md5_hash(file_path, self.file_data[1]):
self.transport.write('File was successfully transferred and saved\n')
# self.transport.write('ENDMSG\n')
display_message('File %s has been successfully transfered' % (filename))
else:
os.unlink(file_path) ###################################################
self.transport.write('File was successfully transfered but not saved, due to invalid MD5 hash\n')
self.transport.write('ENDMSG\n')
display_message(
'File %s has been successfully transfered, but deleted due to invalid MD5 hash' % (filename))
else:
self.file_handler.write(data)
def _send_list_of_files(self):
files = self._get_file_list()
self.factory.files = files
self.transport.write('Files (%d): \n\n' % len(files))
for key, value in files.iteritems():
self.transport.write('- %s (%d.2 KB)\n' % (key, (value[1] / 1024.0)))
self.transport.write('ENDMSG\n')
def _get_file_list(self):
""" Returns a list of the files in the specified directory as a dictionary:
dict['file name'] = (file path, file size, file md5 hash)
"""
file_list = {}
for filename in os.listdir(self.factory.files_path):
file_path = os.path.join(self.factory.files_path, filename)
if os.path.isdir(file_path):
continue
file_size = os.path.getsize(file_path)
md5_hash = get_file_md5_hash(file_path)
file_list[filename] = (file_path, file_size, md5_hash)
return file_list
def _cleanAndSplitInput(self, input):
input = input.strip()
input = input.split(' ')
return input
class FileTransferServerFactory(protocol.ServerFactory):
protocol = FileTransferProtocol
def __init__(self, files_path):
self.files_path = files_path
self.clients = []
self.files = None
if __name__ == '__main__':
parser = optparse.OptionParser()
parser.add_option('-p', '--port', action='store', type='int', dest='port', default=PORT,
help='server listening port')
parser.add_option('--path', action='store', type='string', dest='path', default=DIRECTORY,
help='directory where the incoming files are saved')
(options, args) = parser.parse_args()
display_message('Listening on port %d, serving files from directory: %s' % (options.port, options.path))
reactor.listenTCP(options.port, FileTransferServerFactory(DIRECTORY))
reactor.run()