I have a simple chat application in Tornado powered with RethinkDB.
Am trying to integrate this tornado chat application to run with django site.
For that reason, I have adopted below in rechat.py in order for it to work with django.
- Namespaces tornado.wsgi and django.core.wsgi (get_wsgi_application)
- Set environment variable for Django settings.py os.environ['DJANGO_SETTINGS_MODULE'] = 'djangoapp.settings'
When I try to run it after the above changes, it connects the db server, but doesn't do anything. What am I missing? How can I make this tornado app to work with django 1.8 site?
Below is my code of rechat.py (https://github.com/v3ss0n/rechat) -
import logging
import tornado.escape
from tornado.ioloop import IOLoop
import tornado.web
import os.path
import rethinkdb as r
from tornado import httpserver
from time import time
# from tornado.concurrent import Future
from tornado import gen
from tornado.options import define, options, parse_command_line
import tornado.wsgi
from django.core.wsgi import get_wsgi_application
define("port", default=8888, help="run on the given port", type=int)
define("debug", default=True, help="run in debug mode")
def setup_db(db_name="rechat", tables=['events']):
connection = r.connect(host="localhost")
try:
r.db_create(db_name).run(connection)
for tbl in tables:
r.db(db_name).table_create(tbl, durability="hard").run(connection)
logging.info('Database setup completed.')
except r.RqlRuntimeError:
logging.warn('Database/Table already exists.')
finally:
connection.close()
class RechatApp(tornado.web.Application):
def __init__(self, db):
handlers = [
(r"/", MainHandler),
(r"/a/message/new", MessageNewHandler),
(r"/a/message/updates", MessageUpdatesHandler),
]
settings = dict(cookie_secret="_asdfasdaasdfasfas",
template_path=os.path.join(
os.path.dirname(__file__), "templates"),
static_path=os.path.join(
os.path.dirname(__file__), "static"),
xsrf_cookies=True,
debug=options.debug)
self.db = db
logging.info(db)
tornado.web.Application.__init__(self, handlers, **settings)
class BaseHandler(tornado.web.RequestHandler):
def initialize(self):
self.db = self.application.db
self.evt = r.table("events")
class MainHandler(BaseHandler):
@gen.coroutine
def get(self):
curs = yield self.evt.run(self.db)
messages = []
while (yield curs.fetch_next()):
item = yield curs.next()
messages.append(item)
self.render("index.html", messages=messages)
class MessageNewHandler(BaseHandler):
@gen.coroutine
def post(self):
message = {
"body": self.get_argument("body")
}
# to_basestring is necessary for Python 3's json encoder,
# which doesn't accept byte strings.
start = time()
messages = (yield self.evt.insert(message).run(self.db))
time_taken = time() - start
logging.warn("DBINSERT: %s seconds" % time_taken)
message['id'] = messages['generated_keys'][0]
message["html"] = tornado.escape.to_basestring(
self.render_string("message.html", message=message))
if self.get_argument("next", None):
self.redirect(self.get_argument("next"))
else:
self.write(message)
class MessageUpdatesHandler(BaseHandler):
@gen.coroutine
def post(self):
curs = yield self.evt.changes().run(self.db)
while (yield curs.fetch_next()):
feed = yield curs.next()
message = {
'id': feed['new_val']['id'],
'html': tornado.escape.to_basestring(
self.render_string("message.html",
message=feed['new_val']))}
break
self.finish(dict(messages=[message]))
@gen.coroutine
def main():
""" Async main method. It needed to be async due to r.connect is async . """
parse_command_line()
os.environ['DJANGO_SETTINGS_MODULE'] = 'djangoapp.settings'
db_name = "rechat"
setup_db(db_name)
r.set_loop_type("tornado")
db = yield r.connect("localhost", db=db_name)
#Single db connection for everything thanks a lot Ben and Jeese
http_server = httpserver.HTTPServer(RechatApp(db))
http_server.listen(options.port)
if __name__ == "__main__":
IOLoop.current().run_sync(main)
IOLoop.current().start()
