server.py

import socket
import _thread
import os
import os.path

# server config
serverpath = "/root/serv" # set this to your path you want to serve

myip = "192.168.0.101" # set this to the ip to bind

myport = 4000 # set this to the port to bind

authenabled = 0 # if 1, enable very basic password auth, if 0, disable auth

authhash = "" # this is the md5 hash of the correct password, this is required if auth is enabled but ignored if disabled
# end of server config

def newclient(sock, addr):
	print(addr)
	wel = f"Welcome to {socket.gethostname()}"
	sock.send(wel.encode())

	if(authenabled == 1):
		sock.send("auth is active".encode())
		passhash = sock.recv(1024).decode()
		if(passhash == authhash):
			sock.send("correct".encode())
		else:
			sock.send("incorrect".encode())
			sock.close()
	else:
		sock.send("no auth is needed".encode())
	while True:
		filecommand = sock.recv(1024)
		if(filecommand.decode() == "help"):
			back = "commands:\nhelp - list this\nlist - list directory\ndownload - lets you download a file\ncloseserver - close socket"
			sock.send(back.encode())
		elif(filecommand.decode() == "list"):
			note = "Note: this only lists files, dirs are not supported"
			sock.send(note.encode())
			size = []
			filelist = [f for f in os.listdir(serverpath) if os.path.isfile(os.path.join(serverpath,f))]
			for i in os.listdir(serverpath):
				si = os.path.getsize(serverpath + "/" + i)
				si = readsize(si)
				size.append(si)
			filelist2 = []
			for x, y in zip(filelist, size):
				filelist2.append(f"{x} -- {y}")
			filelist2 = str(filelist2)
			sock.send(filelist2.encode())
		elif(filecommand.decode() == "download"):
			whatfile = sock.recv(1024).decode()
			if(os.path.exists(serverpath + "/" + whatfile)):
				openfile = serverpath + "/" + whatfile
				sendfile = open(openfile, "rb")
				readcontent = sendfile.read(1024)
				while(readcontent):
					sock.send(readcontent)
					readcontent = sendfile.read(1024)
				sendfile.close()
			else:
				cool = "no file"
				sock.send(cool.encode())
		elif(filecommand.decode() == "query"):
			checkfile = sock.recv(1024).decode()
			if(os.path.exists(serverpath + "/" + checkfile)):
				sock.send("Does".encode())
			else:
				sock.send("Does not".encode())  
		elif(filecommand.decode() == "closeserver"):
			sock.close()
		else:
			back = "invalid command - use help for help"
			sock.send(back.encode())

def readsize(size):
	for u in ["B", "KiB", "MiB", "GiB", "TiB"]:
		if size < 1024.0:
			break
		size /= 1024.0
	return f"{size:.3f}{u}"

s = socket.socket()
s.bind((myip, myport))
s.listen(5)
while True:
	sock, addr = s.accept()
	_thread.start_new_thread(newclient,(sock, addr))