216 lines
7.4 KiB
Python
216 lines
7.4 KiB
Python
import argparse
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import json
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import logging
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import os
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import tornado.ioloop
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import tornado.web
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import tornado.websocket
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from urllib.parse import urlparse
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import uuid
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import coloredlogs
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import glob
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from pyaxidraw import axidraw # import module
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from threading import Thread, Event
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from queue import Queue, Empty
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import threading
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from server_test import generated_image_dir
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import asyncio
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logger = logging.getLogger("sorteerhoed").getChild("webserver")
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class StaticFileWithHeaderHandler(tornado.web.StaticFileHandler):
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def set_extra_headers(self, path):
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"""For subclass to add extra headers to the response"""
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if path[-5:] == '.html':
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self.set_header("Access-Control-Allow-Origin", "*")
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if path[-4:] == '.svg':
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self.set_header("Content-Type", "image/svg+xml")
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class WebSocketHandler(tornado.websocket.WebSocketHandler):
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CORS_ORIGINS = ['localhost', '.mturk.com', 'here.rubenvandeven.com']
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connections = set()
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def initialize(self, draw_q: Queue, generated_image_dir: str):
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self.draw_q = draw_q
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self.generated_image_dir = generated_image_dir
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def check_origin(self, origin):
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parsed_origin = urlparse(origin)
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# parsed_origin.netloc.lower() gives localhost:3333
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valid = any([parsed_origin.hostname.endswith(origin) for origin in self.CORS_ORIGINS])
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return valid
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# the client connected
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def open(self, p = None):
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self.__class__.connections.add(self)
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logger.info(f"New client connected: {self.request.remote_ip}")
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self.strokes = []
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# self.write_message("hello!")
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# the client sent the message
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def on_message(self, message):
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logger.debug(f"recieve: {message}")
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try:
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msg = json.loads(message)
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# TODO: sanitize input: min/max, limit strokes
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if msg['action'] == 'move':
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# TODO: min/max input
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point = [float(msg['direction'][0]),float(msg['direction'][1]), bool(msg['mouse'])]
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self.strokes.append(point)
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self.draw_q.put(point)
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elif msg['action'] == 'up':
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logger.info(f'up: {msg}')
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point = [msg['direction'][0],msg['direction'][1], 1]
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self.strokes.append(point)
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elif msg['action'] == 'submit':
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logger.info(f'up: {msg}')
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id = self.submit_strokes()
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if not id:
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self.write_message(json.dumps('error'))
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return
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self.write_message(json.dumps({
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'action': 'submitted',
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'msg': f"Submission ok, please refer to your submission as: {id}"
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}))
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elif msg['action'] == 'down':
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# not used, implicit in move?
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pass
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else:
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# self.send({'alert': 'Unknown request: {}'.format(message)})
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logger.warn('Unknown request: {}'.format(message))
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except Exception as e:
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# self.send({'alert': 'Invalid request: {}'.format(e)})
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logger.exception(e)
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# client disconnected
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def on_close(self):
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self.__class__.rmConnection(self)
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logger.info(f"Client disconnected: {self.request.remote_ip}")
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def submit_strokes(self):
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if len(self.strokes) < 1:
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return False
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d = strokes2D(self.strokes)
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svg = f"""<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<svg viewBox="0 0 600 600"
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xmlns:dc="http://purl.org/dc/elements/1.1/"
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xmlns:cc="http://creativecommons.org/ns#"
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xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
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xmlns:svg="http://www.w3.org/2000/svg"
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xmlns="http://www.w3.org/2000/svg"
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version="1.1"
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>
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<path d="{d}" style="stroke:black;stroke-width:2;fill:none;" />
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</svg>
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"""
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id = uuid.uuid4().hex
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filename = os.path.join(self.generated_image_dir , id+'.svg')
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with open(filename, 'w') as fp:
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logger.info(f"Wrote {filename}")
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fp.write(svg)
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return id
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@classmethod
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def rmConnection(cls, client):
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if client not in cls.connections:
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return
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cls.connections.remove(client)
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class LatestImageHandler(tornado.web.RequestHandler):
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def initialize(self, generated_image_dir: str):
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self.generated_image_dir = generated_image_dir
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def get(self):
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self.set_header('Cache-Control', 'no-store, no-cache, must-revalidate, max-age=0')
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self.set_header("Content-Type", "image/svg+xml")
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list_of_files = glob.glob(os.path.join(self.generated_image_dir,'*.svg'))
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latest_file = max(list_of_files, key=os.path.getctime)
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with open(latest_file, 'r') as fp:
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self.write(fp.read())
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def strokes2D(strokes):
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# strokes to a d attribute for a path
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d = "";
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last_stroke = None;
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cmd = "";
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for stroke in strokes:
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if not last_stroke:
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d += f"M{stroke[0]},{stroke[1]} "
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cmd = 'M'
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else:
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if last_stroke[2] == 1:
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d += " m"
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cmd = 'm'
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elif cmd != 'l':
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d+=' l '
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cmd = 'l'
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rel_stroke = [stroke[0] - last_stroke[0], stroke[1] - last_stroke[1]];
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d += f"{rel_stroke[0]},{rel_stroke[1]} "
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last_stroke = stroke;
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return d;
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class Server:
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"""
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Server for HIT -> plotter events
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As well as for the Status interface
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TODO: change to have the HIT_id as param to the page. Load hit from storage with previous image
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"""
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def __init__(self, config, eventQ: Queue, runningEvent: Event, plotterQ: Queue):
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self.isRunning = runningEvent
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self.eventQ = eventQ
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self.config = config
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self.logger = logger
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self.plotterQ = plotterQ # communicate directly to plotter (skip main thread)
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#self.config['server']['port']
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self.generated_image_dir = os.path.join('www','generated')
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self.static_file_dir = os.path.join('www')
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self.server_loop = None
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def start(self):
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try:
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asyncio.set_event_loop(asyncio.new_event_loop())
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application = tornado.web.Application([
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(r"/ws(.*)", WebSocketHandler, {'draw_q': self.plotterQ, 'generated_image_dir': self.generated_image_dir}),
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(r"/latest.svg", LatestImageHandler, {'generated_image_dir': self.generated_image_dir}), # TODO: have js request the right image, based on a 'start' button. This way we can trace the history of a drawing
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(r"/(.*)", StaticFileWithHeaderHandler,
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{"path": self.static_file_dir, "default_filename": 'index.html'}),
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], debug=True, autoreload=False)
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application.listen(self.config['server']['port'])
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self.server_loop = tornado.ioloop.IOLoop.current()
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if self.isRunning.is_set():
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self.server_loop.start()
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finally:
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self.logger.info("Stopping webserver")
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self.isRunning.clear()
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def stop(self):
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if self.server_loop:
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self.logger.debug("Got call to stop")
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self.server_loop.asyncio_loop.call_soon_threadsafe(self._stop)
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def _stop(self):
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self.server_loop.stop()
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