import asyncio import inspect import logging import os import queue import signal import threading import traceback from aiohttp import web from aputils import Signer from datetime import datetime, timedelta from .config import Config from .database import Database from .http_client import HttpClient from .misc import DotDict, check_open_port, set_app from .views import routes class Application(web.Application): def __init__(self, cfgpath): web.Application.__init__(self, middlewares = [ server_middleware ] ) set_app(self) self['config'] = Config(cfgpath) self['database'] = Database(**self.config.dbconfig) self['client'] = HttpClient() self['starttime'] = None self['signer'] = None self['running'] = False self['workers'] = [] self['last_worker'] = 0 self.database.create() self.set_signal_handler() @property def client(self): return self['client'] @property def config(self): return self['config'] @property def database(self): return self['database'] @property def signer(self): if not self['signer']: with self.database.session as s: privkey = s.get_config('privkey') if not privkey: self['signer'] = Signer.new(self.config.keyid) s.put_config('privkey', self['signer'].export()) else: self['signer'] = Signer(privkey, self.config.keyid) return self['signer'] @property def uptime(self): if not self['starttime']: return timedelta(seconds=0) return datetime.now() - self['starttime'] def push_message(self, inbox, message): if len(self['workers']) <= 0: return asyncio.ensure_future(self.client.post(inbox, message)) worker = self['workers'][self['last_worker']] worker.queue.put((inbox, message)) self['last_worker'] += 1 if self['last_worker'] >= len(self['workers']): self['last_worker'] = 0 def set_signal_handler(self): for sig in {'SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGTERM'}: try: signal.signal(getattr(signal, sig), self.stop) # some signals don't exist in windows, so skip them except AttributeError: pass def run(self): if not check_open_port(self.config.listen, self.config.port): return logging.error(f'A server is already running on port {self.config.port}') for route in routes: self.router.add_route(*route) logging.info(f'Starting webserver at {self.config.host} ({self.config.listen}:{self.config.port})') asyncio.run(self.handle_run()) self.database.disconnect() def stop(self, *_): self['running'] = False def setup(self): self.client.setup() async def handle_run(self): self['running'] = True with self.database.session as s: workers = s.get_config('workers') if workers > 0: for i in range(workers): worker = PushWorker(self) worker.start() self['workers'].append(worker) runner = web.AppRunner(self, access_log_format='%{X-Forwarded-For}i "%r" %s %b "%{User-Agent}i"') await runner.setup() site = web.TCPSite(runner, host = self.config.listen, port = self.config.port, reuse_address = True ) await site.start() self['starttime'] = datetime.now() while self['running']: await asyncio.sleep(0.25) await site.stop() self['starttime'] = None self['running'] = False self['workers'].clear() class PushWorker(threading.Thread): def __init__(self, app): threading.Thread.__init__(self) self.app = app self.queue = queue.Queue() def run(self): self.client = HttpClient() self.client.setup() asyncio.run(self.handle_queue()) async def handle_queue(self): while self.app['running']: try: inbox, message = self.queue.get(block=True, timeout=0.25) self.queue.task_done() logging.verbose(f'New push from Thread-{threading.get_ident()}') await self.client.post(inbox, message) except queue.Empty: pass ## make sure an exception doesn't bring down the worker except Exception: traceback.print_exc() await self.client.close() @web.middleware async def server_middleware(request, handler): if len(inspect.signature(handler).parameters) == 1: response = await handler(request) else: with request.database.session as s: response = await handler(request, s) ## make sure there's some sort of response if response == None: logging.error(f'No response for handler: {handler}') response = Response.new_error(500, 'No response') response.headers['Server'] = 'ActivityRelay' return response ## Can't sub-class web.Request, so let's just add some properties def request_actor(self): try: return self['actor'] except KeyError: pass def request_instance(self): try: return self['instance'] except KeyError: pass def request_message(self): try: return self['message'] except KeyError: pass def request_signature(self): if 'signature' not in self._state: try: self['signature'] = DotDict.new_from_signature(self.headers['signature']) except KeyError: return return self['signature'] setattr(web.Request, 'actor', property(request_actor)) setattr(web.Request, 'instance', property(request_instance)) setattr(web.Request, 'message', property(request_message)) setattr(web.Request, 'signature', property(request_signature)) setattr(web.Request, 'config', property(lambda self: self.app.config)) setattr(web.Request, 'database', property(lambda self: self.app.database))