Got it working! Sure enough, I needed the connection/header upgrade
stanzas on the loadbalancer's proxy_pass config, but i didn't need to
make any changes to the actual web server nginx uwsgi_pass config. Have
updated the PR.
Now, as far as I can tell, the assumption in the examples is that your
worker will be tied up in a while True: loop handling requests, right?
so the next thing i have to think about is the concurrency model... am
taking a look at
https://github.com/unbit/uwsgi/blob/master/tests/websockets_chat_async.py.
HP
On 07/07/17 12:48, Harry Percival wrote:
Or maybe the uwsgi_pass nginx proxy *does* handle websockets, but
the standard proxy_pass one does not? so i just need to fix the
config on my loadbalancer (which uses proxy_pass) but not the one on
my web server? will try that...
On 07/07/17 12:45, Harry Percival wrote:
OK I *think* the docs are incorrect -- they currently say that nginx
just works out of the box, but as far as I can tell that's incorrect,
you need to explicitly get it to proxy the Upgrade and Connection
headers:
https://nginx.org/en/docs/http/websocket.html
here's a PR to fix the docs (if indeed I am correct! it's still not
working. https://github.com/unbit/uwsgi-docs/pull/362)
rgds,
Harry & the PythonAnywhere team
On 07/07/17 11:49, Harry Percival wrote:
Hey there uwsgi friends,
Thought I'd do a little experiment to see if we can get websockets
working in our infrastructure. here's the setup:
* loadbalancer: nginx forwards http requests to correct web server
based on domain name
* web server: nginx listens on port 80, proxies to uwsgi via
"uwsgi_pass" to a unix socket
* uwsgi emperor
* uwsgi vassals: listen on correct socket
all works fine for standard WSGI HTTP/S stuff. now I'd like to see
if websockets will work.
It's a bit hard to tell from the documentation whether things should
"just work" already, or whether I need to set up additional routing
in nginx? https://uwsgi-docs.readthedocs.io/en/latest/WebSockets.html
currently I'm seeing uwsgi.websocket_handshake() seems to work ok,
but uwsgi.websocket_recv() is hanging/failing with an OSError:
unable to receive websocket message
uwsgi --version 2.0.14
nginx version: openresty/1.9.15.1
cheers all!
Harry.
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Harry Percival
Developer
[email protected]
PythonAnywhere - a fully browser-based Python development and hosting
environment
<http://www.pythonanywhere.com/>
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