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hackney

1.11.0
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Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support

Security advisory: This version has known vulnerabilities. View advisories
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hackney src hackney_pool_handler.erl
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src/hackney_pool_handler.erl 

%%% -*- erlang -*-

%%%

%%% This file is part of hackney released under the Apache 2 license.

%%% See the NOTICE for more information.

%%%

-module(hackney_pool_handler).



-include("hackney.hrl").



-type host() :: binary() | string().

-type client() :: #client{}.



-ifdef(no_callback_support).



-export([behaviour_info/1]).



-spec behaviour_info(atom()) -> [{atom(), arity()}] | undefined.

behaviour_info(callbacks) ->

  [{start, 0},

    {checkout, 4},

    {checkin, 2}];

behaviour_info(_) ->

  undefined.



-else.



%% start a pool handler

-callback start() -> ok | {error, Reason :: any()}.



%% checkout a connection for use

-callback checkout(Host::host(), Port::integer(),Transport::atom(),

  Client::client()) ->

  {ok, {Info::any(), CheckingReference::any(), Owner::pid(),

    Transport::atom()}, Socket::inet:socket()}

  | {error, Reason :: any()}.



%% checkin an open connection after use

-callback checkin({Info::any(), CheckingReference::any(), Owner::pid(),

  Transport::atom()}, Socket::inet:socket()) ->

  ok

  | {error, Reason :: any()}.



%% pass a message to the given pool

-callback notify(Pool::atom(), Message::any()) -> ok.



-endif.