python-talk/server.py

403 lines
16 KiB
Python

import os, sys, asyncio, re, signal
from firepup650 import console
from logs import log
class Globals: ...
G = Globals()
G.uniqueClients = 0
G.serverLinks = 0
G.servers = {}
G.clientsConnected = []
port = 65048
G.msgs = []
G.remoteID = "firepi"
G.event = asyncio.Event()
G.loop = asyncio.get_event_loop()
G.interruptCount = 0
G.killList = {}
G.outboundLinks = []
G.S2SLogs = []
saveLogs = True
# Try to load a message log, if one exists
try:
G.msgs = __import__("cache").msgs
log(f"Got {len(G.msgs)} lines from message cache")
except ImportError:
log("No server message cache.", level="WARN")
except Exception:
log(
"Abnormal state! Failed to load cache even though the file exists!",
level="WARN",
)
try:
for arg in sys.argv:
if arg.startswith("--port") or arg.startswith("-p"):
port = int(arg.lstrip("-port="))
elif arg in ["-n", "--no-cache"]:
log("Explicitly erasing cached messages")
G.msgs = []
elif arg in ["-?", "-h", "--help"]:
print("TODO: Help menu soon")
exit(0)
elif arg in ["-l", "--no-logs"]:
log("Explicitly disabling saving of logs!")
saveLogs = False
elif arg.startswith("--link"):
G.outboundLinks.append((arg[6:], int(arg.split(":")[1])))
else:
log(f"Unrecognized argument {arg}!", "WARN")
except Exception:
sys.tracebacklimit = 0
raise ValueError("Invalid arguments. Please refer to -? for usage.") from None
def raw(string: str) -> str:
s = string.strip()
s = f"{s!r}"[1:-1].replace("\\\\", "\\")
if '"' in s:
return s.replace("\\'", "'")
else:
return s
def fmt(msg: str, name: str = "", action: bool = False) -> str:
if action:
return f"* {name}{' '*(20-len(name))} {msg}"
else:
return f" {name}{' '*(20-len(name))}: {msg}"
async def handleClient(reader, writer):
try:
global G
writer.write(b"Please identify yourself. Nick limit is 20 chars.\n")
await writer.drain()
name = raw((await reader.read(20)).decode("utf8"))
if len(name) > 20:
name = name[
:19
] # Really this is only possible if someone passes raw unicode as a nick, but let's clean it up anyways.
try:
await asyncio.wait_for(
reader.read(), 0.01
) # Silently consume the excess username data
except asyncio.TimeoutError:
pass
if not name:
writer.write(b"Nice try. Actually set a nick.\n")
await writer.drain()
writer.close()
await writer.wait_closed()
return
if name in G.clientsConnected:
writer.write(f"Nick ({name}) in use\n".encode("utf8"))
await writer.drain()
writer.close()
await writer.wait_closed()
return
if not name.startswith("S2S-"):
G.clientsConnected.extend([name])
msgIndex = 0
G.uniqueClients += 1
G.msgs.extend([log(f"{name} has connected to the server.")])
while 1:
try:
buffer = await asyncio.wait_for(reader.read(967), 0.1)
request = raw(buffer.decode("utf8"))
response = None
if request.startswith("/mes "):
response = log(f"* {name}'s {request[5:]}")
elif request.startswith("/me "):
response = log(f"* {name} {request[4:]}")
elif request.startswith("/h"):
writer.write(b"TODO: Command listing\n")
await writer.drain()
elif request.startswith("/quit"):
break
elif request.startswith("/afk"):
if len(request) > 5:
response = log(f"* {name} is afk to {request[4:]}")
else:
response = log(f"* {name} is afk")
elif request.startswith("/back"):
response = log(f"* {name} is back")
elif request:
response = log(f" {name}: {request}")
if response:
G.msgs.extend([response])
except asyncio.TimeoutError:
pass
if msgIndex < len(G.msgs):
writer.writelines(G.msgs[msgIndex:])
await writer.drain()
msgIndex = len(G.msgs)
if name in G.killList and G.killList[name]:
writer.write(b"Your client has been killed by the server\n")
G.killList[name] = False
break
await writer.drain()
writer.close()
await writer.wait_closed()
G.uniqueClients -= 1
G.msgs.append(log(f"{name} has disconnected from the server."))
G.clientsConnected.remove(name)
else: # This is... probably a server?
sName = name[4:] # Trim off the S2S label
log(f"Server link! Link from {sName}")
G.serverLinks += 1
G.servers[sName] = []
msgIndex = 0
writer.write("I am awaiting your client listing.\n")
while 1:
client = raw((await reader.read(1024)).decode("utf8"))
if client == f"END OF CLIENT LISTING FROM {sName}":
break
if client in G.servers[sName] or client in G.clientsConnected:
writer.write(b"K Client rejected: Already exists\n")
await writer.drain()
continue
writer.write(b"I added that client.\n")
await writer.drain()
G.msgs.append(log(f"{client} has connected from {sName}"))
G.servers[sName].append(client)
writer.write(f"{G.remoteID}\n".encode("utf8"))
await writer.drain()
await reader.read()
for client in G.clientsConnected:
writer.write(f"{client}\n".encode("utf8"))
resp = raw((await reader.read(1024)).decode("utf8"))
if resp.startswith("K"):
G.killList[client] = True
writer.write(f"END OF CLIENT LISTING FROM {G.remoteID}\n".encode("utf8"))
G.clientsConnected.extend(G.servers[sName])
while 1:
try:
rawMsg = await asyncio.wait_for(reader.read(967), 0.1)
buffer = raw(rawMsg.decode("utf8"))
match buffer[0]:
case "S": # Server notice
G.msgs.extend([log(buffer[2:])])
writer.write(b"I Mmm... Blueberries\n")
case "I":
pass
case "+":
cName = buffer[2:]
if cName not in G.clientsConnected:
G.msgs.append(
log(f"{cName} has connected from {sName}")
)
G.servers[sName].append(cName)
G.clientsConnected.append(cName)
writer.write(b"I Mmm... Pineapples\n")
else:
writer.write(f"K {cName}".encode("utf8"))
case "-":
cName = buffer[2:]
G.msgs.append(log(f"{cName} has disconnected from {sName}"))
G.servers[sName].remove(cName)
G.clientsConnected.remove(cName)
writer.write(b"I Mmm... Bananas\n")
case "M":
cName = buffer[2:].split("|", 1)[0]
message = buffer[2:].split("|", 1)[1]
G.msgs.append(log(f" {cName}: {message}"))
writer.write(
b"I Get these damn heretic ghost clients out of my store so i can buy my cult candles in peace."
)
case "A":
cName = buffer[2:].split("|", 1)[0]
message = buffer[2:].split("|", 1)[1]
G.msgs.append(log(f"* {cName} {message}"))
writer.write(b"I Mmm... Strawberries\n")
case "Q":
break
case "K":
cName = buffer[2:]
G.killList[cName] = True
writer.write(b"I Mmm... Blood\n")
case _:
writer.write(
f"S Your server is doing drugs over here, sending me bullshit messages man - {G.remoteID}, A fellow server\n".encode("utf8")
)
await writer.drain()
except TimeoutError:
pass
await writer.drain()
writer.close()
await writer.wait_closed()
for cName in G.servers[sName]:
G.msgs.append(log(f"{cName}'s server is going down"))
G.clientsConnected.remove(cName)
G.serverLinks -= 1
G.servers.remove(sName)
G.msgs.append(log(f"{sName} has de-linked from the network"))
except (ConnectionResetError, BrokenPipeError):
if not name.startswith("S2S-"):
G.uniqueClients -= 1
G.msgs.append(log(f"{name} has disconnected from the server."))
G.clientsConnected.remove(name)
else:
for cName in G.servers[name[4:]]:
G.msgs.append(log(f"{cName}'s server is going down"))
try:
G.clientsConnected.remove(cName)
except Exception: # Crash during connection sequence?
pass
G.serverLinks -= 1
G.servers.remove(name[4:])
G.msgs.append(log(f"{name[4:]} has de-linked from the network"))
async def connectServer(hostname: str, port: int):
reader, writer = await asyncio.open_connection(hostname, port)
await reader.read(1024)
writer.write(f"S2S-{G.remoteID}\n".encode("utf8"))
await writer.drain()
await reader.read(1024)
for client in G.clientsConnected:
writer.write(f"{client}\n".encode("utf8"))
await writer.drain()
resp = raw((await reader.read(1024)).decode("utf8"))
if resp.startswith("K"):
G.killList[client] = True
writer.write(f"END OF CLIENT LISTING FROM {G.remoteID}\n".encode("utf8"))
await writer.drain()
rID = raw((await reader.read(1024)).decode("utf8"))
G.serverLinks += 1
G.servers.append(rID)
writer.write(b"I recieved your remote ID, now awaiting client listing\n")
# recieve client list from the other server
while 1:
client = raw((await reader.read(1024)).decode("utf8"))
if client == f"END OF CLIENT LISTING FROM {rID}":
break
if client in G.servers[rID] or client in G.clientsConnected:
writer.write(b"K Client rejected: Already exists\n")
await writer.drain()
continue
writer.write(b"I added that client.\n")
await writer.drain()
G.msgs.append(log(f"{client} has connected from {rID}"))
G.servers[rID].append(client)
G.clientsConnected.extend(G.servers[rID])
try:
while 1:
try:
rawMsg = await asyncio.wait_for(reader.read(967), 0.1)
buffer = raw(rawMsg.decode("utf8"))
match buffer[0]:
case "S":
G.msgs.extend([log(buffer[2:])])
writer.write(b"I Mmm... Blueberries\n")
case "I":
pass
case "+":
cName = buffer[2:]
if cName not in G.clientsConnected:
G.msgs.append(log(f"{cName} has connected from {rID}"))
G.servers[rID].append(cName)
G.clientsConnected.append(cName)
writer.write(b"I Mmm... Pineapples\n")
else:
writer.write(f"K {cName}\n".encode("utf8"))
case "-":
cName = buffer[2:]
G.msgs.append(log(f"{cName} has disconnected from {sName}"))
G.servers[rID].remove(cName)
G.clientsConnected.remove(cName)
case "M":
cName = buffer[2:].split("|", 1)[0]
message = buffer[2:].split("|", 1)[1]
G.msgs.append(log(f" {cName}: {message}"))
writer.write(
b"I Get these damn heretic ghost clients out of my store so i can buy my cult candles in peace."
)
case "A":
cName = buffer[2:].split("|", 1)[0]
message = buffer[2:].split("|", 1)[1]
G.msgs.append(log(f"* {cName} {message}"))
writer.write(b"I Mmm... Strawberries\n")
case "Q":
break
case "K":
cName = buffer[2:]
G.killList[cName] = True
writer.write(b"I Mmm... Blood\n")
case _:
writer.write(
f"S Your server is doing drugs over here, sending me bullshit messages man - {G.remoteID}, A fellow server\n".encode(
"utf8"
)
)
await writer.drain()
except TimeoutError:
pass
await writer.drain()
writer.close()
await writer.wait_closed()
for cName in G.servers[rID]:
G.msgs.append(log(f"{cName}'s server is going down"))
G.clientsConnected.remove(cName)
G.serverLinks -= 1
G.servers.remove(rID)
G.msgs.append(log(f"{rID} has de-linked from the network"))
except (ConnectionResetError, BrokenPipeError):
for cName in G.servers[rID]:
G.msgs.append(log(f"{cName}'s server is going down"))
try:
G.clientsConnected.remove(cName)
except Exception:
pass
G.serverLinks -= 1
G.servers.remove(rID)
G.msgs.append(log(f"{rID} has de-linked from the network"))
async def runServer(port: int):
global G
server = await asyncio.start_server(handleClient, "0.0.0.0", port)
log(f"Listening on port {port}...")
G.msgs.append(log("Server startup"))
links = []
for hostname, portNum in G.outboundLinks:
links.append(connectServer(hostname, portNum))
crash = False
try:
links.append(G.event.wait())
await asyncio.gather(*links)
except Exception:
crash = True
G.msgs.append(log("Server crash", level="FATAL")[1:])
log("Shutting down from Exception")
# TODO: Add format_exc here
finally:
if not crash:
G.msgs.append(log("Server shutdown"))
log("Kicking all clients as we go down")
server.close()
# server.abort_clients()
if saveLogs:
with open("cache.py", "w") as cache:
cache.write(f"msgs = {G.msgs}\n")
log("Saved logs, exiting now.")
else:
log("Not saving logs, exiting now.")
class ServerInterruptException(KeyboardInterrupt): ...
def interruptCatch(s, f):
global G
print()
G.loop.call_soon_threadsafe(G.event.set)
G.interruptCount += 1
sys.tracebacklimit = 0
raise ServerInterruptException from None
signal.signal(signal.SIGINT, interruptCatch)
asyncio.run(runServer(port))