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server.py
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server.py
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from math import floor
import Queue
import SocketServer
import datetime
import random
import re
import sqlite3
import sys
import threading
import time
import traceback
HOST = '0.0.0.0'
PORT = 4080
CHUNK_SIZE = 32
BUFFER_SIZE = 1024
SPAWN_POINT = (0, 0, 0, 0, 0)
DB_PATH = 'craft.db'
COMMIT_INTERVAL = 5
YOU = 'U'
BLOCK = 'B'
CHUNK = 'C'
POSITION = 'P'
DISCONNECT = 'D'
TALK = 'T'
KEY = 'K'
def log(*args):
now = datetime.datetime.utcnow()
print now, ' '.join(map(str, args))
def chunked(x):
return int(floor(round(x) / CHUNK_SIZE))
class Server(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
allow_reuse_address = True
daemon_threads = True
class Handler(SocketServer.BaseRequestHandler):
def setup(self):
self.queue = Queue.Queue()
self.running = True
self.start()
def handle(self):
model = self.server.model
model.enqueue(model.on_connect, self)
try:
buf = []
while True:
data = self.request.recv(BUFFER_SIZE)
if not data:
break
buf.extend(data.replace('\r', ''))
while '\n' in buf:
index = buf.index('\n')
line = ''.join(buf[:index])
buf = buf[index + 1:]
model.enqueue(model.on_data, self, line)
finally:
model.enqueue(model.on_disconnect, self)
def finish(self):
self.running = False
def start(self):
thread = threading.Thread(target=self.run)
thread.setDaemon(True)
thread.start()
def run(self):
while self.running:
try:
buf = []
try:
buf.append(self.queue.get(timeout=5))
try:
while True:
buf.append(self.queue.get(False))
except Queue.Empty:
pass
except Queue.Empty:
continue
data = ''.join(buf)
self.request.sendall(data)
except Exception:
self.request.close()
raise
def send_raw(self, data):
if data:
self.queue.put(data)
def send(self, *args):
data = '%s\n' % ','.join(map(str, args))
#log('SEND', self.client_id, data[:-1])
self.send_raw(data)
class Model(object):
def __init__(self):
self.next_client_id = 1
self.clients = []
self.queue = Queue.Queue()
self.commands = {
CHUNK: self.on_chunk,
BLOCK: self.on_block,
POSITION: self.on_position,
TALK: self.on_talk,
}
self.patterns = [
(re.compile(r'^/nick(?:\s+(\S+))?$'), self.on_nick),
(re.compile(r'^/spawn$'), self.on_spawn),
(re.compile(r'^/goto(?:\s+(\S+))?$'), self.on_goto),
(re.compile(r'^/pq\s+(-?[0-9]+)\s*,?\s*(-?[0-9]+)$'), self.on_pq),
(re.compile(r'^/help$'), self.on_help),
(re.compile(r'^/players$'), self.on_players),
]
def start(self):
thread = threading.Thread(target=self.run)
thread.setDaemon(True)
thread.start()
def run(self):
self.connection = sqlite3.connect(DB_PATH)
self.create_tables()
self.commit()
while True:
try:
if time.time() - self.last_commit > COMMIT_INTERVAL:
self.commit()
self.dequeue()
except Exception:
traceback.print_exc()
def enqueue(self, func, *args, **kwargs):
self.queue.put((func, args, kwargs))
def dequeue(self):
try:
func, args, kwargs = self.queue.get(timeout=5)
func(*args, **kwargs)
except Queue.Empty:
pass
def execute(self, *args, **kwargs):
return self.connection.execute(*args, **kwargs)
def commit(self):
self.last_commit = time.time()
self.connection.commit()
def create_tables(self):
queries = [
'create table if not exists block ('
' p int not null,'
' q int not null,'
' x int not null,'
' y int not null,'
' z int not null,'
' w int not null'
');',
'create index if not exists block_xyz_idx on block (x, y, z);',
'create unique index if not exists block_pqxyz_idx on '
' block (p, q, x, y, z);',
]
for query in queries:
self.execute(query)
def on_connect(self, client):
client.client_id = self.next_client_id
client.nick = 'player%d' % client.client_id
self.next_client_id += 1
log('CONN', client.client_id, *client.client_address)
client.position = SPAWN_POINT
self.clients.append(client)
client.send(YOU, client.client_id, *client.position)
client.send(TALK, 'Welcome to Craft!')
client.send(TALK, 'Type "/help" for chat commands.')
self.send_position(client)
self.send_positions(client)
self.send_talk(client,
'%s has joined the game.' % client.nick)
def on_data(self, client, data):
#log('RECV', client.client_id, data)
args = data.split(',')
command, args = args[0], args[1:]
if command in self.commands:
func = self.commands[command]
func(client, *args)
def on_disconnect(self, client):
log('DISC', client.client_id, *client.client_address)
self.clients.remove(client)
self.send_disconnect(client)
self.send_talk(client,
'%s has disconnected from the server.' % client.nick)
def on_chunk(self, client, p, q, key=0):
p, q, key = map(int, (p, q, key))
query = (
'select rowid, x, y, z, w from block where '
'p = :p and q = :q and rowid > :key;'
)
rows = self.execute(query, dict(p=p, q=q, key=key))
max_rowid = 0
for rowid, x, y, z, w in rows:
client.send(BLOCK, p, q, x, y, z, w)
max_rowid = max(max_rowid, rowid)
if max_rowid:
client.send(KEY, p, q, max_rowid)
def on_block(self, client, x, y, z, w):
x, y, z, w = map(int, (x, y, z, w))
if y <= 0 or y > 255 or w < 0 or w > 11:
return
p, q = chunked(x), chunked(z)
query = (
'insert or replace into block (p, q, x, y, z, w) '
'values (:p, :q, :x, :y, :z, :w);'
)
self.execute(query, dict(p=p, q=q, x=x, y=y, z=z, w=w))
self.send_block(client, p, q, x, y, z, w)
if chunked(x - 1) != p:
self.execute(query, dict(p=p - 1, q=q, x=x, y=y, z=z, w=-w))
self.send_block(client, p - 1, q, x, y, z, -w)
if chunked(x + 1) != p:
self.execute(query, dict(p=p + 1, q=q, x=x, y=y, z=z, w=-w))
self.send_block(client, p + 1, q, x, y, z, -w)
if chunked(z - 1) != q:
self.execute(query, dict(p=p, q=q - 1, x=x, y=y, z=z, w=-w))
self.send_block(client, p, q - 1, x, y, z, -w)
if chunked(z + 1) != q:
self.execute(query, dict(p=p, q=q + 1, x=x, y=y, z=z, w=-w))
self.send_block(client, p, q + 1, x, y, z, -w)
def on_position(self, client, x, y, z, rx, ry):
x, y, z, rx, ry = map(float, (x, y, z, rx, ry))
client.position = (x, y, z, rx, ry)
self.send_position(client)
def on_talk(self, client, *args):
text = ','.join(args)
if text.startswith('/'):
for pattern, func in self.patterns:
match = pattern.match(text)
if match:
func(client, *match.groups())
else:
text = '%s> %s' % (client.nick, text)
self.send_talk(client, text)
def on_nick(self, client, nick=None):
if nick is None:
client.send(TALK, 'Your nickname is %s' % client.nick)
else:
self.send_talk(client,
'%s is now known as %s' % (client.nick, nick))
client.nick = nick
def on_spawn(self, client):
client.position = SPAWN_POINT
client.send(YOU, client.client_id, *client.position)
self.send_position(client)
def on_goto(self, client, nick=None):
if nick is None:
clients = [x for x in self.clients if x != client]
other = random.choice(self.clients) if clients else None
else:
nicks = dict((client.nick, client) for client in self.clients)
other = nicks.get(nick)
if other:
client.position = other.position
client.send(YOU, client.client_id, *client.position)
self.send_position(client)
def on_pq(self, client, p, q):
p, q = map(int, (p, q))
if abs(p) > 1000 or abs(q) > 1000:
return
client.position = (p * CHUNK_SIZE, 0, q * CHUNK_SIZE, 0, 0)
client.send(YOU, client.client_id, *client.position)
self.send_position(client)
def on_help(self, client):
client.send(TALK, 'Type "t" to chat with other players.')
client.send(TALK, 'Type "/" to start typing a command.')
client.send(TALK,
'Commands: /goto [NAME], /help, /nick [NAME], /players, /spawn')
def on_players(self, client):
client.send(TALK,
'Players: %s' % ', '.join(x.nick for x in self.clients))
def send_positions(self, client):
for other in self.clients:
if other == client:
continue
client.send(POSITION, other.client_id, *other.position)
def send_position(self, client):
for other in self.clients:
if other == client:
continue
other.send(POSITION, client.client_id, *client.position)
def send_disconnect(self, client):
for other in self.clients:
if other == client:
continue
other.send(DISCONNECT, client.client_id)
def send_block(self, client, p, q, x, y, z, w):
for other in self.clients:
if other == client:
continue
other.send(BLOCK, p, q, x, y, z, w)
def send_talk(self, client, text):
for other in self.clients:
other.send(TALK, text)
def main():
host, port = HOST, PORT
if len(sys.argv) > 1:
host = sys.argv[1]
if len(sys.argv) > 2:
port = int(sys.argv[2])
log('SERV', host, port)
model = Model()
model.start()
server = Server((host, port), Handler)
server.model = model
server.serve_forever()
if __name__ == '__main__':
main()