Remove periodic ping

Servers are already re-pinged on update.

server_list/ping.py

@@ -1,6 +1,4 @@
-import asyncio
 import time
-import random
 import socket
 
 from .app import app
@@ -37,61 +35,6 @@ def get_ping_reply(data):
 	return b"\x4f\x45\x74\x03" + peer_id + b"\x00\x00\x03"
 
 
-class MinetestProtocol:
-	def connection_made(self, transport):
-		self.transport = transport
-
-	def send_original(self):
-		self.transport.sendto(PING_PACKET)
-
-		self.start = time.time()
-
-	def datagram_received(self, data, addr):
-		end = time.time()
-		self.transport.sendto(get_ping_reply(data), addr)
-
-		self.future.set_result(end - self.start)
-		self.transport.close()
-
-	def connection_lost(self, exc):
-		if not self.future.done():
-			self.future.set_result(None)
-
-	def error_received(self, exc):
-		self.future.set_result(None)
-
-
-async def ping_server_async(address, sock=None):
-	loop = asyncio.get_event_loop()
-	transport, protocol = await loop.create_datagram_endpoint(
-			MinetestProtocol,
-			remote_addr=address,
-			sock=sock)
-	attempts = 0
-	pings = []
-	while len(pings) < 3 and attempts - len(pings) < 3:
-		attempts += 1
-		protocol.future = loop.create_future()
-		try:
-			# Sleep a bit to spread requests out
-			await asyncio.sleep(random.random())
-			protocol.send_original()
-			ping = await asyncio.wait_for(asyncio.shield(protocol.future), 2)
-			if ping is not None:
-				pings.append(ping)
-		except asyncio.TimeoutError:
-			pass
-
-	if len(pings) != 0:
-		return min(pings)
-
-	return None
-
-
-async def ping_servers_async(addresses):
-	return await asyncio.gather(*[ping_server_async(a) for a in addresses])
-
-
 def ping_server_addresses(address, port):
 	pings = []
 	addr_info = get_addr_info(address, port)

server_list/tasks.py

@@ -1,11 +1,10 @@
-import asyncio
 import json
 import os
 from datetime import datetime
 
 from .app import app, celery, db
 from .models import Server, Stats
-from .ping import ping_servers_async, ping_server_addresses
+from .ping import ping_server_addresses
 from .util import get_geo_continent, server_ranking
 
 
@@ -75,27 +74,6 @@ def update_list():
 	db.session.commit()
 
 
-@celery.task
-def update_ping():
-	servers = Server.query.filter_by(online=True).all()
-
-	addresses = [(s.address, s.port) for s in servers]
-	pings = []
-
-	async def do_ping():
-		pings.extend(await ping_servers_async(addresses))
-	asyncio.run(do_ping())
-
-	for i, server in enumerate(servers):
-		if pings[i] is None:
-			server.set_offline()
-		else:
-			server.ping = pings[i]
-
-	db.session.commit()
-
-
 @celery.on_after_configure.connect
 def setup_periodic_tasks(sender, **kwargs):
 	sender.add_periodic_task(60, update_list.s(), name='Update server list')
-	sender.add_periodic_task(5*60, update_ping.s(), name='Update server ping')