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The XY Problem http://www.perlmonks.org/index.pl?node_id=542341

REST is far more appropriate for databases.

Pub/sub is well catered for by socket.io (websockets).

This glue belongs on the server.

If I did need arbitrary TCP connections my first thought would be a websocket proxy...

I wouldn't. I'd make a HTTP call to the server, and let the server handle it. (i.e. your "what's so different from the backend method")?

Yep, and i wrote about differences to such approach in the post. Don't get me wrong, this is definitely a hack, I'm not saying people should stop doing it the old way.

Likewise. While I appreciate the concept of a bridge (I'm a strong believer that the fastest app is the app that does practically nothing at all, and I can see the benefit of using a TCP-bridge like thing to make something faster), I just think we should not be reinventing the wheel.

That is to say, if you need a TCP connection to any server, you probably should not be implementing it over HTTP (well, this is where definitions get difficult, since you know, HTTP is technically TCP. Fuck)