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launchdarkly_server_sdk

1.0.0-beta2
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LaunchDarkly SDK for Erlang

Retired package: Deprecated - This version will not be able to connect to and communicate with LaunchDarkly after support for the HTTP/2 protocol is enabled.
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launchdarkly_server_sdk src ldclient_event_dispatch_httpc.erl
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src/ldclient_event_dispatch_httpc.erl 

%%-------------------------------------------------------------------

%% @doc Event dispatcher

%%

%% @end

%%-------------------------------------------------------------------



-module(ldclient_event_dispatch_httpc).



-behaviour(ldclient_event_dispatch).



%% Behavior callbacks

-export([send/4]).



%%===================================================================

%% Behavior callbacks

%%===================================================================



%% @doc Send events to LaunchDarkly event server

%%

%% @end

-spec send(JsonEvents :: binary(), PayloadId :: uuid:uuid(), Uri :: string(), SdkKey :: string()) -> ok.

send(JsonEvents, PayloadId, Uri, SdkKey) ->

    Headers = [

        {"Authorization", SdkKey},

        {"X-LaunchDarkly-Event-Schema", ldclient_settings:get_event_schema()},

        {"User-Agent", ldclient_settings:get_user_agent()},

        {"X-LaunchDarkly-Payload-ID", uuid:uuid_to_string(PayloadId)}

    ],

    {ok, {{Version, StatusCode, ReasonPhrase}, _Headers, _Body}} =

        httpc:request(post, {Uri, Headers, "application/json", JsonEvents}, [], []),

    Result = if

        StatusCode < 400 -> ok;

        true ->

            case is_http_error_code_recoverable(StatusCode) of

                true ->

                    {error, temporary, format_response(Version, StatusCode, ReasonPhrase)};

                _ ->

                    {error, permanent, format_response(Version, StatusCode, ReasonPhrase)}

            end

    end,

    Result.



%%===================================================================

%% Internal functions

%%===================================================================



-spec format_response(Version :: string(), StatusCode :: integer(), ReasonPhrase :: string()) ->

    string().

format_response(Version, StatusCode, ReasonPhrase) ->

    io_lib:format("~s ~b ~s", [Version, StatusCode, ReasonPhrase]).



-spec is_http_error_code_recoverable(StatusCode :: integer()) -> boolean().

is_http_error_code_recoverable(400) -> true;

is_http_error_code_recoverable(408) -> true;

is_http_error_code_recoverable(429) -> true;

is_http_error_code_recoverable(StatusCode) when StatusCode >= 500 -> true;

is_http_error_code_recoverable(_) -> false.