Ciboulette
Hey guys,
Is-it possible to communicate between a phoenix/Elixir server with other servers built in Node.js, Python, Ruby, PHP.. using websocket protocol ?
I’ve tried to do it but no success.. I have the problem of Phoenix channels protocols…
Where Next?
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grych
Why do you want to do is? Are the “normal” webmessages (json or xml over http) not enough?
chrismccord
Yes, channels can be used for server ↔ server communication, but you need to write the channels client in your target language of choice.
OvermindDL1
You can also communicate just via a custom TCP protocol too if you want, you can do anything related to networking and communication pretty easily here.
krapans
Yea, then you just need to write your own wrapper fo all TCP
Done that, however that was time consuming.
OvermindDL1
There are libraries in Hex.pm that make that very simple (I had my own customized version of gen_tcp back in the erlang days I used for that).
krapans
Ok, nice to know that, because once, when I actively used node.js as my backend service language, that was interesting time for me
OvermindDL1
Ogod I feel sorry for you… o.O
Handling raw packets in node is an utter pain! The bit/binary syntax makes parsing raw packets on the EVM a joy! The matchers actually read like the spec. ^.^
sasajuric
Another option would be to use websockets without Phoenix channels. I believe this is possible to setup by installing a custom Cowboy handler (is that right @chrismccord?). The benefit is that you can then use plain websockets, without needing to implement the channels clients in different languages. This should simplify/reduce your work in those other technologies, because you could just use available websocket client libraries to communicate with your Elixir system.
However, I also think that @grych has a point with his question. You may want to consider if you really need websockets. In many cases, standard HTTP requests might be a simpler option.
entone
If you have control over the remote servers, I would definitely think about a REST API or something like RabbitMQ for message brokering. If websockets are your only available interface, then I look at using something like Gun GitHub - ninenines/gun: HTTP/1.1, HTTP/2, Websocket client (and more) for Erlang/OTP. · GitHub for your client. You’ll need a websocket client in order to connect to the remote servers.
hubertlepicki
I concur. We use RabbitMQ to talk between Ruby and Elixir and it works really good, with minimal boilerplate code. Definitely simpler than building API.