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Small guide fixes

This commit is contained in:
Loïc Hoguin 2017-10-13 23:20:49 +02:00
parent d3f15cfd8b
commit f104da9322
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2 changed files with 10 additions and 9 deletions

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@ -193,8 +193,8 @@ callback.
If you implement the methods PUT, POST and/or PATCH,
you must implement the `content_types_accepted` callback,
and one `AcceptResource` callback for each content-type
it returns. Prefix the `AcceptResource` callback names
and one `AcceptCallback` callback for each content-type
it returns. Prefix the `AcceptCallback` callback names
with `from_` for clarity. For example, `from_html` or
`from_json`.

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@ -57,18 +57,19 @@ be:
[source,erlang]
----
init(Req, State) ->
case cowboy_req:parse_header(<<"sec-websocket-protocol">>, Req) of
init(Req0, State) ->
case cowboy_req:parse_header(<<"sec-websocket-protocol">>, Req0) of
undefined ->
{cowboy_websocket, Req, State};
{cowboy_websocket, Req0, State};
Subprotocols ->
case lists:keymember(<<"mqtt">>, 1, Subprotocols) of
true ->
Req2 = cowboy_req:set_resp_header(<<"sec-websocket-protocol">>,
<<"mqtt">>, Req),
{cowboy_websocket, Req2, State};
Req = cowboy_req:set_resp_header(<<"sec-websocket-protocol">>,
<<"mqtt">>, Req0),
{cowboy_websocket, Req, State};
false ->
{stop, Req, State}
Req = cowboy_req:reply(400, Req0),
{ok, Req, State}
end
end.
----