diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/src/guide/ws_handlers.asciidoc | 30 | ||||
| -rw-r--r-- | doc/src/manual/cowboy_websocket.asciidoc | 28 |
2 files changed, 28 insertions, 30 deletions
diff --git a/doc/src/guide/ws_handlers.asciidoc b/doc/src/guide/ws_handlers.asciidoc index b280fd8..1411ab6 100644 --- a/doc/src/guide/ws_handlers.asciidoc +++ b/doc/src/guide/ws_handlers.asciidoc @@ -69,14 +69,14 @@ init(Req, State) -> %% Register process here... {cowboy_websocket, Req, State}. -websocket_info(post_init, Req, State) -> +websocket_info(post_init, State) -> %% Perform post_init initialization here... - {ok, Req, State}. + {ok, State}. ---- === Handling frames from the client -Cowboy will call `websocket_handle/3` whenever a text, binary, +Cowboy will call `websocket_handle/2` whenever a text, binary, ping or pong frame arrives from the client. Note that in the case of ping and pong frames, no action is expected as Cowboy automatically replies to ping frames. @@ -89,15 +89,15 @@ ignores all others. [source,erlang] ---- -websocket_handle(Frame = {text, _}, Req, State) -> - {reply, Frame, Req, State}; -websocket_handle(_Frame, Req, State) -> - {ok, Req, State}. +websocket_handle(Frame = {text, _}, State) -> + {reply, Frame, State}; +websocket_handle(_Frame, State) -> + {ok, State}. ---- === Handling Erlang messages -Cowboy will call `websocket_info/3` whenever an Erlang message +Cowboy will call `websocket_info/2` whenever an Erlang message arrives. The handler can decide to send frames to the socket, stop @@ -108,10 +108,10 @@ and ignores all others. [source,erlang] ---- -websocket_info({log, Text}, Req, State) -> - {reply, {text, Text}, Req, State}; -websocket_info(_Info, Req, State) -> - {ok, Req, State}. +websocket_info({log, Text}, State) -> + {reply, {text, Text}, State}; +websocket_info(_Info, State) -> + {ok, State}. ---- === Sending frames to the socket @@ -126,13 +126,13 @@ tuple. [source,erlang] ---- -websocket_info(hello_world, Req, State) -> +websocket_info(hello_world, State) -> {reply, [ {text, "Hello"}, {text, <<"world!">>}, {binary, <<0:8000>>} - ], Req, State}; -%% More websocket_info/3 clauses here... + ], State}; +%% More websocket_info/2 clauses here... ---- Note that the payload for text and binary frames is of type diff --git a/doc/src/manual/cowboy_websocket.asciidoc b/doc/src/manual/cowboy_websocket.asciidoc index ac9016b..b76d5e1 100644 --- a/doc/src/manual/cowboy_websocket.asciidoc +++ b/doc/src/manual/cowboy_websocket.asciidoc @@ -13,7 +13,7 @@ be implemented by handlers. The `init/2` and `terminate/3` callbacks are common to all handler types and are documented in the manual for the link:cowboy_handler.asciidoc[cowboy_handler] module. -The `websocket_handle/3` and `websocket_info/3` callbacks are +The `websocket_handle/2` and `websocket_info/2` callbacks are specific to Websocket handlers and will be called as many times as necessary until the Websocket connection is closed. @@ -84,18 +84,17 @@ timeout:: == Callbacks -=== websocket_handle(InFrame, Req, State) -> Ret +=== websocket_handle(InFrame, State) -> Ret [source,erlang] ---- -Ret = {ok, Req, State} - | {ok, Req, State, hibernate} - | {reply, OutFrame | [OutFrame], Req, State} - | {reply, OutFrame | [OutFrame], Req, State, hibernate} - | {stop, Req, State} +Ret = {ok, State} + | {ok, State, hibernate} + | {reply, OutFrame | [OutFrame], State} + | {reply, OutFrame | [OutFrame], State, hibernate} + | {stop, State} InFrame = {text | binary | ping | pong, binary()} -Req = cowboy_req:req() State = any() OutFrame = cow_ws:frame() ---- @@ -113,18 +112,17 @@ The `hibernate` option will hibernate the process until it receives new data from the Websocket connection or an Erlang message. -=== websocket_info(Info, Req, State) -> Ret +=== websocket_info(Info, State) -> Ret [source,erlang] ---- -Ret = {ok, Req, State} - | {ok, Req, State, hibernate} - | {reply, OutFrame | [OutFrame], Req, State} - | {reply, OutFrame | [OutFrame], Req, State, hibernate} - | {stop, Req, State} +Ret = {ok, State} + | {ok, State, hibernate} + | {reply, OutFrame | [OutFrame], State} + | {reply, OutFrame | [OutFrame], State, hibernate} + | {stop, State} Info = any() -Req = cowboy_req:req() State = any() OutFrame = cow_ws:frame() ---- |