151 lines
5.0 KiB
Python
151 lines
5.0 KiB
Python
import asyncio
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import logging
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import json
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import os
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import time
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import websockets
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from threading import Thread
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from multiprocessing import Process
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from flask import Flask, abort, jsonify, request, render_template, send_from_directory
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from platypush.config import Config
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from platypush.message import Message
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from platypush.message.event import Event
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from platypush.message.request import Request
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from .. import Backend
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class HttpBackend(Backend):
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""" Example interaction with the HTTP backend to make requests:
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$ curl -XPOST -H 'Content-Type: application/json' -H "X-Token: your_token" \
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-d '{"type":"request","target":"nodename","action":"tts.say","args": {"phrase":"This is a test"}}' \
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http://localhost:8008/execute """
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def __init__(self, port=8008, websocket_port=8009, token=None, **kwargs):
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super().__init__(**kwargs)
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self.port = port
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self.websocket_port = websocket_port
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self.token = token
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self.server_proc = None
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self.websocket_thread = None
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self.active_websockets = set()
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def send_message(self, msg):
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logging.warning('Use cURL or any HTTP client to query the HTTP backend')
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def stop(self):
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logging.info('Received STOP event on HttpBackend')
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if self.server_proc:
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self.server_proc.terminate()
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self.server_proc.join()
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def notify_web_clients(self, event):
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async def send_event(websocket):
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await websocket.send(str(event))
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loop = asyncio.new_event_loop()
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active_websockets = set()
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for websocket in self.active_websockets:
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try:
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loop.run_until_complete(send_event(websocket))
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active_websockets.add(websocket)
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except websockets.exceptions.ConnectionClosed:
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logging.info('Client connection lost')
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self.active_websockets = active_websockets
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def webserver(self):
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template_dir = os.path.join(os.getcwd(),'platypush','backend','http','templates')
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static_dir = os.path.join(os.getcwd(),'platypush','backend','http','static')
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app = Flask(__name__, template_folder=template_dir)
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@app.route('/execute', methods=['POST'])
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def execute():
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args = json.loads(request.data.decode('utf-8'))
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token = request.headers['X-Token'] if 'X-Token' in request.headers else None
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if token != self.token: abort(401)
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msg = Message.build(args)
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logging.info('Received message on the HTTP backend: {}'.format(msg))
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if isinstance(msg, Request):
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response = msg.execute(async=False)
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logging.info('Processing response on the HTTP backend: {}'.format(msg))
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return str(response)
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elif isinstance(msg, Event):
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self.bus.post(msg)
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return jsonify({ 'status': 'ok' })
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@app.route('/')
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def index():
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configured_plugins = Config.get_plugins()
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enabled_plugins = {}
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for plugin, conf in configured_plugins.items():
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template_file = os.path.join('plugins', plugin + '.html')
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if os.path.isfile(os.path.join(template_dir, template_file)):
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enabled_plugins[plugin] = conf
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return render_template('index.html', plugins=enabled_plugins,
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token=self.token, websocket_port=self.websocket_port)
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@app.route('/static/<path>')
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def static_path(path):
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return send_from_directory(static_dir, filename)
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return app
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def websocket(self):
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async def register_websocket(websocket, path):
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logging.info('New websocket connection from {}'.format(websocket.remote_address[0]))
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self.active_websockets.add(websocket)
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while True:
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try:
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waiter = await websocket.ping()
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await asyncio.wait_for(waiter, timeout=5)
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except (asyncio.TimeoutError, websockets.exceptions.ConnectionClosed) as e:
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logging.info('Client {} closed connection'.format(websocket.remote_address[0]))
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self.active_websockets.remove(websocket)
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break
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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loop.run_until_complete(
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websockets.serve(register_websocket, 'localhost', self.websocket_port))
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loop.run_forever()
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def run(self):
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super().run()
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logging.info('Initialized HTTP backend on port {}'.format(self.port))
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webserver = self.webserver()
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self.server_proc = Process(target=webserver.run, kwargs={
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'debug':True, 'host':'0.0.0.0', 'port':self.port, 'use_reloader':False
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})
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self.websocket_thread = Thread(target=self.websocket)
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time.sleep(1)
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self.server_proc.start()
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self.websocket_thread.start()
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self.server_proc.join()
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self.websocket_thread.join()
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# vim:sw=4:ts=4:et:
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