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erlang-client.utils.mustache Maven / Gradle / Ivy
-module({{packageName}}_utils).
-export([request/8,
select_header_content_type/1,
optional_params/2]).
-type response_info() :: #{status := integer(),
headers := list()}.
-export_type([response_info/0]).
request(_Ctx, Method, Path, QS, Headers, Body, Opts, Cfg) ->
{Headers1, QS1} = update_params_with_auth(Cfg, Headers, QS),
Host = maps:get(host, Cfg, "localhost:8001"),
Url = hackney_url:make_url(Host, Path, QS1),
ConfigHackneyOpts = maps:get(hackney_opts, Cfg, []),
Body1 = case lists:keyfind(<<"Content-Type">>, 1, Headers1) of
{_, <<"application/json", _/binary>>} ->
jsx:encode(Body);
_ ->
Body
end,
case hackney:request(Method, Url, Headers1, Body1, Opts++ConfigHackneyOpts) of
{ok, ClientRef} ->
%% return value if Opts includes `async`
{ok, ClientRef};
{ok, Status, RespHeaders, ClientRef} when Status >= 200,
Status =< 299 ->
{ok, ResponseBody} = hackney:body(ClientRef),
Resp = decode_response(RespHeaders, ResponseBody),
{ok, Resp, #{status => Status,
headers => RespHeaders}};
{ok, Status, RespHeaders, ClientRef} when Status >= 300 ->
{ok, ResponseBody} = hackney:body(ClientRef),
Resp = decode_response(RespHeaders, ResponseBody),
{error, Resp, #{status => Status,
headers => RespHeaders}}
end.
decode_response(Headers, Body) ->
case lists:keyfind(<<"Content-Type">>, 1, Headers) of
{_, <<"application/json", _/binary>>} ->
jsx:decode(Body, [return_maps, {labels, atom}]);
%% TODO: yml, protobuf, user defined function
_ ->
Body
end.
optional_params([], _Params) -> [];
optional_params(Keys, Params) ->
[{Key, maps:get(Key, Params)} || Key <- Keys, maps:is_key(Key, Params)].
select_header_content_type([]) ->
[];
select_header_content_type(ContentTypes) ->
case lists:member(<<"application/json">>, ContentTypes) orelse lists:member(<<"*/*">>, ContentTypes) of
true ->
[{<<"Content-Type">>, <<"application/json">>}];
false ->
[{<<"Content-Type">>, hd(ContentTypes)}]
end.
auth_with_prefix(Cfg, Key, Token) ->
Prefixes = maps:get(api_key_prefix, Cfg, #{}),
case maps:get(Key, Prefixes, undefined) of
undefined ->
Token;
Prefix ->
<>
end.
update_params_with_auth(Cfg, Headers, QS) ->
AuthSettings = maps:get(auth, Cfg, #{}),
Auths = #{ {{#authMethods}}'{{name}}' =>
#{type => '{{type}}',
key => <<"{{#isApiKey}}{{keyParamName}}{{/isApiKey}}{{^isApiKey}}Authorization{{/isApiKey}}">>,
in => {{^isApiKey}}header{{/isApiKey}}{{#isKeyInHeader}}header{{/isKeyInHeader}}{{#isKeyInQuery}}query{{/isKeyInQuery}}}{{^-last}}, {{/-last}}{{/authMethods}}},
maps:fold(fun(AuthName, #{type := _Type,
in := In,
key := Key}, {HeadersAcc, QSAcc}) ->
case maps:get(AuthName, AuthSettings, undefined) of
undefined ->
{HeadersAcc, QSAcc};
Value ->
case In of
header ->
{[{Key, auth_with_prefix(Cfg, Key, Value)} | HeadersAcc], QSAcc};
query ->
{HeadersAcc, [{Key, auth_with_prefix(Cfg, Key, Value)} | QSAcc]}
end
end
end, {Headers, QS}, Auths).
