def release(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
client = file_system_manager.get_active_client(client_id)
res = file_system_manager.release_item(client, split_data[1])
if res == 0:
response = split_data[1] + " released"
elif res == -1:
response = "you do not hold the lock for %s" % split_data[1]
connection.sendall(response.encode())
else:
error_response(connection, 1)
def cd(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
res = file_system_manager.change_directory(split_data[1], client_id)
response = ""
if res == 0:
response = "changed directory to %s" % split_data[1]
elif res == 1:
response = "directory %s doesn't exist" % split_data[1]
connection.sendall(response.encode())
else:
error_response(connection, 1)
def ls(connection, client_id, split_data, file_system_manager):
response = ""
if len(split_data) == 1:
response = file_system_manager.list_directory_contents(client_id)
connection.sendall(response.encode())
elif len(split_data) == 2:
response = file_system_manager.list_directory_contents(
client_id, split_data[1])
connection.sendall(response.encode())
else:
error_response(connection, 1)
def mkdir(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
response = ""
res = file_system_manager.make_directory(client_id, split_data[1])
if res == 0:
response = "new directory %s created" % split_data[1]
elif res == 1:
response = "file of same name exists"
elif res == 2:
response = "directory of same name exists"
connection.sendall(response.encode())
else:
error_response(connection, 1)
def rmdir(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
response = ""
res = file_system_manager.remove_directory(client_id, split_data[1])
if res == -1:
response = "%s doesn't exist" % split_data[1]
elif res == 0:
response = "%s removed" % split_data[1]
elif res == 1:
response = "%s is a file" % split_data[1]
elif res == 2:
response = "directory has locked contents"
connection.sendall(response.encode())
else:
error_response(connection, 1)
def delete(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
res = file_system_manager.delete_file(client_id, split_data[1])
response = ""
if res == 0:
response = "delete successfull"
elif res == 1:
response = "file locked"
elif res == 2:
response = "use rmdir to delete a directory"
elif res == 3:
response = "file doesn't exist"
connection.sendall(response.encode())
else:
error_response(connection, 1)
def lock(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
client = file_system_manager.get_active_client(client_id)
res = file_system_manager.lock_item(client, split_data[1])
response = ""
if res == 0:
response = "file locked"
elif res == 1:
response = "file already locked"
elif res == 2:
response = "file doesn't exist"
elif res == 3:
response = "locking directories is not supported"
connection.sendall(response.encode())
else:
error_response(connection, 1)
def start_client_interaction(connection, client_address):
try:
#A client id is generated, that is associated with this client
client_id = file_system_manager.add_client(connection)
while True:
data = connection.recv(1024).decode()
split_data = seperate_input_data(data)
# Respond to the appropriate message
if data == "KILL_SERVICE":
kill_service(connection)
elif split_data[0] == "ls":
ls(connection, client_id, split_data, file_system_manager)
elif split_data[0] == "cd":
cd(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "up":
up(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "read":
read(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "write":
write(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "delete":
delete(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "lock":
lock(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "release":
release(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "mkdir":
mkdir(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "rmdir":
rmdir(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "pwd":
pwd(connection, split_data, client_id, file_system_manager)
elif split_data[0] == "exit":
exit(connection, split_data, client_id, file_system_manager)
else:
error_response(connection, 1)
except:
error_response(connection, 0)
connection.close()
def write(connection, split_data, client_id, file_system_manager):
response = ""
if len(split_data) == 2:
res = file_system_manager.write_item(client_id, split_data[1], "")
if res == 0:
response = "write successfull"
elif res == 1:
response = "file locked"
elif res == 2:
response = "cannot write to a directory file"
connection.sendall(response.encode())
elif len(split_data) == 3:
res = file_system_manager.write_item(client_id, split_data[1],
split_data[2])
if res == 0:
response = "write successfull"
elif res == 1:
response = "file locked"
elif res == 2:
response = "cannot write to a directory file"
connection.sendall(response.encode())
else:
error_response(connection, 1)
def pwd(connection, split_data, client_id, file_system_manager):
if len(split_data) == 1:
response = file_system_manager.get_working_dir(client_id)
connection.sendall(response.encode())
else:
error_response(connection, 1)
def up(connection, split_data, client_id, file_system_manager):
if len(split_data) == 1:
file_system_manager.move_up_directory(client_id)
else:
error_response(connection, 1)
def read(connection, split_data, client_id, file_system_manager):
if len(split_data) == 2:
response = file_system_manager.read_item(client_id, split_data[1])
connection.sendall(response.encode())
else:
error_response(connection, 1)