{ok, _} = application:ensure_all_started(gun).gun - HTTP/1.1, HTTP/2 and Websocket client for Erlang/OTP
Gun is an HTTP client for Erlang/OTP with support for the HTTP/1.1, HTTP/2 and Websocket protocols.
Gun aims to provide an easy to use, asynchronous and always-connected client. It maintains a permanent connection to the server and reconnects automatically when necessary.
gun(3) - Asynchronous HTTP client
cowlib(7) - Support library for manipulating Web protocols
ssl - Secure communication over sockets
All these applications must be started before the gun
application. To start Gun and all dependencies at once:
{ok, _} = application:ensure_all_started(gun).The gun application does not define any application
environment configuration parameters.