Provides functions for working with WebSockets as a client. Based on the modified version of the wsock library.
Connect to the WebSocket echo server:
1> {ok, S} = ewsc:connect("wss://echo.websocket.org").
{ok,{sslsocket,{gen_tcp,#Port<0.68832>,tls_connection,
undefined},
<0.1362.0>}}
Send data and receive response:
2> ewsc:send(S, "data"). % or ewsc:send(S, <<"data">>).
ok
3> ewsc:recv(S, 1000). % timeout im milliseconds
{ok,[<<"data">>]}
Send ping and receive response:
4> ewsc:send(S, ping).
ok
5> ewsc:recv(S, 1000).
{ok,[pong]}
Try to receive something:
6> ewsc:recv(S, 1000).
{error,timeout}
If that was ping from the server, respond on it:
7> ewsc:recv(S, 1000).
{ok,[ping]}
8> ewsc:send(S, pong).
ok
Send close, receive confirmation and try to receive anything else:
9> ewsc:send(S, close).
ok
10> ewsc:recv(S, 1000).
{ok,[close]}
11> ewsc:recv(S, 1000).
{error,closed}
The connection can be modified with additional headers and connection options:
Headers = [{"Authorization", "Basic dXNlcm5hbWU6cGFzc3dvcmQK"}].
Options = [{cacertfile, "ca.pem"}].
ewsc:connect("wss://echo.websocket.org", Headers, Options).
See ssl and gen_tcp Erlang modules documentation for more information about possible connection options.
Copyright 2018-2019 Anton Alferov (@aialferov)
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.