97 lines
3 KiB
Python
97 lines
3 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division
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#https://github.com/hiroakis/tornado-websocket-example/blob/master/app.py
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#http://stackoverflow.com/questions/5892895/tornado-websocket-question
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#possibly get https://github.com/methane/wsaccel
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#possibly run the full django app throw tornado instead of gunicorn
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#https://github.com/bdarnell/django-tornado-demo/blob/master/testsite/tornado_main.py
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#http://stackoverflow.com/questions/7190431/tornado-with-django
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#http://www.tornadoweb.org/en/stable/wsgi.html
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from tornado.httpserver import HTTPServer
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from tornado.ioloop import IOLoop
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from tornado.web import Application
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from tornado.websocket import WebSocketHandler
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from Queue import Queue
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import urllib2
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import os
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from contextlib import closing
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import json
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from threading import Thread
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class Background:
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def __init__(self, handler):
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self.handler = handler
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self.q = Queue()
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def worker(self):
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while True:
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message = self.q.get()
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action, data = json.loads(message)
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if action == 'get':
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if 'url' in data and data['url'].startswith('http'):
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self.download(data['url'], '/tmp/test.data')
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elif action == 'update':
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self.post({'error': 'not implemented'})
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else:
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self.post({'error': 'unknown action'})
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self.q.task_done()
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def join(self):
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self.q.join()
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def put(self, data):
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self.q.put(data)
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def post(self, data):
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if not isinstance(data, basestring):
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data = json.dumps(data)
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main.add_callback(lambda: self.handler.write_message(data))
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def download(self, url, filename):
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dirname = os.path.dirname(filename)
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if dirname and not os.path.exists(dirname):
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os.makedirs(dirname)
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with open(filename, 'w') as f:
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with closing(urllib2.urlopen(url)) as u:
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size = int(u.headers.get('content-length', 0))
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done = 0
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chunk_size = max(min(1024*1024, int(size/100)), 4096)
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print 'chunksize', chunk_size
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for data in iter(lambda: u.read(chunk_size), ''):
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f.write(data)
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done += len(data)
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if size:
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percent = done/size
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self.post({'url': url, 'size': size, 'done': done, 'percent': percent})
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class Handler(WebSocketHandler):
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def open(self):
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print "New connection opened."
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self.background = Background(self)
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self.t = Thread(target=self.background.worker)
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self.t.daemon = True
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self.t.start()
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#websocket calls
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def on_message(self, message):
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self.background.put(message)
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def on_close(self):
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print "Connection closed."
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self.background.join()
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print "Server started."
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HTTPServer(Application([("/", Handler)])).listen(28161)
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main = IOLoop.instance()
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main.start()
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