The implementation is only partial for now but should work for all browsers implementing it.
To this end we are formatting the header names just like OTP does except we do it for names of up to 32 characters, as there are widely used header names of more than 20 characters, the limit that OTP follows currently. An example of such header name would be Sec-Websocket-Version. The formatting itself is fairly simple: an uppercase character at the start and after dashes, everything else lowercase.
Until calendar exports them at least.
Also sends a message 'shoot' that can be received by the protocol to make sure Cowboy has had enough time to fully initialize the socket. This message should be received before any socket-related operations are performed. WebSocket request connections are now moved from the pool 'default' to the pool 'websocket', meaning we can have a lot of running WebSockets despite having a low 'max_connections' setting.
Based on Mochi Media, Inc.'s work in Mochiweb. Conflicts: rebar.config
Mostly thanks to Magnus Klaar as it took me a while to figure out how PropEr tests had to be written.
Improves the readability of websocket handler code by having two functions: websocket_handle/3 handles the packets received from the socket, removing the tuple construct that was otherwise needed, so only websocket_handle(Data, Req, State) is needed now; websocket_info/3 handles the messages that the websocket handler process received, as websocket_info(Info, Req, State). Both functions return values are handled identically by Cowboy so nothing changes on that end.
Idea given by bfrog, fixes issue #34.
This ensures we can cleanup what we did in Handler:init/3.
Fixes issue #31. Recursion shouldn't happen in a single catch statement or inside a try .. catch statement. The only safe construct for catching exceptions and perform recursion when everything goes well is to put the recursive call inside a try .. of .. catch construct in the of .. catch block. Otherwise the stack gets filled with exception-related information since they can still be caught if we were to send them and unfold the whole thing. Thanks go to lpgauth for reporting the issue and people on IRC for explaining the hows and whys.