Python BaseHTTPServer and Tornado - python-2.7

Question

I'm running a BaseHTTPServer, passed through ThreadedHTTPServer so I get threading.
server = ThreadedHTTPServer(('', int(port)), MainHandler)
Next I fork according to the info here: Daemonizing python's BaseHTTPServer
Then I do:
server.serve_forever()
What I am trying to do is have the same Python script run a Tornado WebSocket server as well, I tried creating the second handler and in my main creating the second server similar to above, but then the serve_forever() blocks (I assume) and I can't start the Tornado WebSocket server.
I had considered using Tornado to serve my general web stuff too but performance was aweful and unusable, so I'd prefer to run it alongside, unless there is a simpler alternative to adding WebSockets to the BaseHTTPServer.
Can anyone offer a solution please?

Answer 1

Yes, serve_forever() blocks it all. You can use handle_request to serve one request at a time. To assure it won't block you have to set timeout. To run it periodically you can use tornado.ioloop.PeriodicCallback. Example:
#!/usr/bin/python
# -*- coding: utf-8 -*-
from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
from SocketServer import ThreadingMixIn
import threading
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)
class Handler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)
self.end_headers()
message = threading.currentThread().getName()
self.wfile.write(message)
self.wfile.write('\n')
return
class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
"""Handle requests in a separate thread."""
class IndexHandler(tornado.web.RequestHandler):
def get(self):
greeting = self.get_argument('greeting', 'Hello')
self.write(greeting + ', friendly user!\n')
if __name__ == '__main__':
# create Tornado Server
tornado.options.parse_command_line()
app = tornado.web.Application(handlers=[(r"/", IndexHandler)])
http_server = tornado.httpserver.HTTPServer(app)
http_server.listen(options.port)
# create BaseHTTPServer
server = ThreadedHTTPServer(('localhost', 8080), Handler)
server.timeout = 0.01
tornado.ioloop.PeriodicCallback(server.handle_request, 100).start() # every 100 milliseconds
tornado.ioloop.IOLoop.instance().start()
Running:
$ curl http://localhost:8080/
Thread-1
$ curl http://localhost:8080/
Thread-2
$ curl http://localhost:8000/
Hello, friendly user!
$ curl http://localhost:8080/
Thread-3
$ curl http://localhost:8000/
Hello, friendly user!
$ curl http://localhost:8080/
Thread-4
$ curl http://localhost:8000/
Hello, friendly user!
$ curl http://localhost:8000/
Hello, friendly user!
I used here timeout attribute to set timeout. I'm not sure if it's proper way to do it. Other method: http://code.activestate.com/recipes/499376/
Another solution: running every server in its own thread:
#!/usr/bin/python
# -*- coding: utf-8 -*-
from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
from SocketServer import ThreadingMixIn
import threading
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)
class Handler(BaseHTTPRequestHandler):
def do_GET(self):
self.send_response(200)
self.end_headers()
message = threading.currentThread().getName()
self.wfile.write(message)
self.wfile.write('\n')
return
class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
"""Handle requests in a separate thread."""
class IndexHandler(tornado.web.RequestHandler):
def get(self):
greeting = self.get_argument('greeting', 'Hello')
self.write(greeting + ', friendly user!\n')
def run_tornado():
tornado.options.parse_command_line()
app = tornado.web.Application(handlers=[(r"/", IndexHandler)])
http_server = tornado.httpserver.HTTPServer(app)
http_server.listen(options.port)
tornado.ioloop.IOLoop.instance().start()
def run_base_http_server():
server = ThreadedHTTPServer(('localhost', 8080), Handler)
server.serve_forever()
if __name__ == '__main__':
threading.Thread(target=run_tornado).start()
threading.Thread(target=run_base_http_server).start()