Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.
https://ide.geeksforgeeks.org/66BOohBXCu
1) do it in an executor
2) cache its results so that if there are multiple requests you don't fetch the same frame multiple times
Hello
I developed one of the demo programs (chat)
But the problem I encountered is that I can't display a image(url) in the tepmplate html
in index.html i have
class MessageNewHandler(BaseHandler):
"""Post a new message to the chat room."""
def post(self):
img_url = UsernameFinder.find_Avatr(self)
name = UsernameFinder.find_screenName(self)
body= self.get_argument("body")
message = {"id": str(uuid.uuid4()), "img_url": str(img_url) ,"name": name ,"body":body}
#message = {"id": str(uuid.uuid4()), "img_url":img_url ,"name": name ,"body":body}
message["html"] = tornado.escape.to_unicode(
self.render_string("message.html", message= message)
)
if self.get_argument("next", None):
self.redirect(self.get_argument("next"))
else:
#name = tornado.escape.xhtml_escape(self.current_user)
print(type(message))
self.write(message)
global_message_buffer.add_message(message)Now how can I show img_url , and name and body in seperate <td>
Does anyone have a good reading resource about async coroutines in tornado?
I’m searching for a sample of a coroutine added to what is documented in tornado.locks.
My test throws the widely discoussed was never awaitederror. But helpful resources are always for pythonic not tornado solutions...
Does anyone have a good reading resource about async coroutines in tornado?
I’m searching for a sample of a coroutine added to what is documented in tornado.locks.
My test throws the widely discoussedwas never awaitederror. But helpful resources are always for pythonic not tornado solutions...
the doc’s have that documented in a other section: https://www.tornadoweb.org/en/stable/guide/coroutines.html
I did not see that.
https://<ip>:<port>/path/to/handler?<etc>
Is there a trick could inject an obj into each tornado handlers ?
Why did I usetornado.gen.sleep(2)inasync def get()work,butasyncio.sleep(2)not work?
raiseloop = events.get_running_loop() RuntimeError: no running event loop
If I have in a handler this
self.render('login.html')and in login.html I put something like this
{{ __name__ }} I get login_html on the browserthe only reason I want this is to display extra "debugging" information for other devs when working on a development env.
is there a way to tell Tornado about the URL root of my web app?
I am supplying an authentication module with
auth_provider, if I set the login_url in there to /login, the login page is correctly served on host/rooturl/login, but If I access host/rooturl with my browser, I get redirected to host/login.Now if I set
login_url to /urlroot/login, it gets served at host/urlroot/urlroot/login.
Hey. Im running a mozilla-webthing-python that is built upon tornado and i have it on a small IOT Device that has GPIO. It supports intel MRAA Framework and i use it with a interrupt function.
Too much informaiton?
Well just forget the details. The Problem i walked in to is that it generates a new thread and im wondering how i can reach the MainThread again?
Any ideas?
Hi everyone,
I'm trying to use tornado App + socket.io for some tunneling.
Imagine I would like to do the following - on every connection coming from the socket.io, I would like to add a new coroutine to the tornado loop. Coroutine method looks like this:
async def read_routine(self):
logging.info("Starting reading routine")
while True:
try:
if self.stream:
data = await self.stream.read_bytes(1024)
await self.io.emit("response", {"data": data})
except Exception as e:
logging.error(f"Reading routine stopped with error {e}")
breakI'm trying to add this callback to the ioloop:
app = tornado.web.Application(
[
(r"/health", MainHandler),
(r"/socket.io/", socketio.get_tornado_handler(handler.io)),
],
debug=True,
)
app_port = 6006
app.listen(app_port)
loop = tornado.ioloop.IOLoop.current()
loop.add_callback(handler.read_routine)
logging.info(f"starting server on port {app_port}")
loop.start()But it blocks the execution on the add_callback operation, so the application never starts. How to fix this?