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glisten
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0.1.0
a shiny Gleam TCP/TLS server
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src/glisten.erl
-module(glisten).
-compile([no_auto_import, nowarn_unused_vars]).
-export([send/2, handler/2, with_close/2, with_pool_size/2, serve/2, serve_ssl/4]).
-export_type([start_error/0, message/1, connection/1, handler/2]).
-type start_error() :: listener_closed |
listener_timeout |
acceptor_timeout |
{acceptor_failed, gleam@erlang@process:exit_reason()} |
{acceptor_crashed, gleam@dynamic:dynamic_()} |
{system_error, glisten@socket:socket_reason()}.
-type message(HRL) :: {packet, bitstring()} | {user, HRL}.
-type connection(HRM) :: {connection,
{ok, {{integer(), integer(), integer(), integer()}, integer()}} |
{error, nil},
glisten@socket:socket(),
glisten@socket@transport:transport(),
gleam@erlang@process:subject(glisten@handler:message(HRM))}.
-opaque handler(HRN, HRO) :: {handler,
fun(() -> {HRO, gleam@option:option(gleam@erlang@process:selector(HRN))}),
fun((message(HRN), HRO, connection(HRN)) -> gleam@otp@actor:next(message(HRN), HRO)),
gleam@option:option(fun(() -> nil)),
integer()}.
-spec send(connection(any()), gleam@bit_builder:bit_builder()) -> {ok, nil} |
{error, glisten@socket:socket_reason()}.
send(Conn, Msg) ->
(erlang:element(12, erlang:element(4, Conn)))(erlang:element(3, Conn), Msg).
-spec handler(
fun(() -> {HSL, gleam@option:option(gleam@erlang@process:selector(HSM))}),
fun((message(HSM), HSL, connection(HSM)) -> gleam@otp@actor:next(message(HSM), HSL))
) -> handler(HSM, HSL).
handler(On_init, Loop) ->
{handler, On_init, Loop, none, 10}.
-spec map_user_selector(gleam@erlang@process:selector(message(HSA))) -> gleam@erlang@process:selector(glisten@handler:loop_message(HSA)).
map_user_selector(Selector) ->
gleam_erlang_ffi:map_selector(Selector, fun(Value) -> case Value of
{packet, Msg} ->
{packet, Msg};
{user, Msg@1} ->
{custom, Msg@1}
end end).
-spec convert_loop(
fun((message(HSF), HSG, connection(HSF)) -> gleam@otp@actor:next(message(HSF), HSG))
) -> fun((glisten@handler:loop_message(HSF), HSG, glisten@handler:connection(HSF)) -> gleam@otp@actor:next(glisten@handler:loop_message(HSF), HSG)).
convert_loop(Loop) ->
fun(Msg, Data, Conn) ->
Conn@1 = {connection,
erlang:element(2, Conn),
erlang:element(3, Conn),
erlang:element(4, Conn),
erlang:element(5, Conn)},
case Msg of
{packet, Msg@1} ->
case Loop({packet, Msg@1}, Data, Conn@1) of
{continue, Data@1, Selector} ->
{continue,
Data@1,
gleam@option:map(Selector, fun map_user_selector/1)};
{stop, Reason} ->
{stop, Reason}
end;
{custom, Msg@2} ->
case Loop({user, Msg@2}, Data, Conn@1) of
{continue, Data@2, Selector@1} ->
{continue,
Data@2,
gleam@option:map(
Selector@1,
fun map_user_selector/1
)};
{stop, Reason@1} ->
{stop, Reason@1}
end
end
end.
-spec with_close(handler(HST, HSU), fun(() -> nil)) -> handler(HST, HSU).
with_close(Handler, On_close) ->
erlang:setelement(4, Handler, {some, On_close}).
-spec with_pool_size(handler(HSZ, HTA), integer()) -> handler(HSZ, HTA).
with_pool_size(Handler, Size) ->
erlang:setelement(5, Handler, Size).
-spec serve(handler(any(), any()), integer()) -> {ok, nil} |
{error, start_error()}.
serve(Handler, Port) ->
_pipe = Port,
_pipe@1 = glisten@tcp:listen(_pipe, []),
_pipe@2 = gleam@result:map_error(_pipe@1, fun(Err) -> case Err of
closed ->
listener_closed;
timeout ->
listener_timeout;
Err@1 ->
{system_error, Err@1}
end end),
_pipe@5 = gleam@result:then(
_pipe@2,
fun(Socket) ->
_pipe@3 = {pool,
Socket,
convert_loop(erlang:element(3, Handler)),
erlang:element(5, Handler),
erlang:element(2, Handler),
erlang:element(4, Handler),
glisten@socket@transport:tcp()},
_pipe@4 = glisten@acceptor:start_pool(_pipe@3),
gleam@result:map_error(_pipe@4, fun(Err@2) -> case Err@2 of
init_timeout ->
acceptor_timeout;
{init_failed, Reason} ->
{acceptor_failed, Reason};
{init_crashed, Reason@1} ->
{acceptor_crashed, Reason@1}
end end)
end
),
gleam@result:replace(_pipe@5, nil).
-spec serve_ssl(handler(any(), any()), integer(), binary(), binary()) -> {ok,
nil} |
{error, start_error()}.
serve_ssl(Handler, Port, Certfile, Keyfile) ->
_assert_subject = ssl_ffi:start_ssl(),
{ok, _} = case _assert_subject of
{ok, _} -> _assert_subject;
_assert_fail ->
erlang:error(#{gleam_error => let_assert,
message => <<"Assertion pattern match failed"/utf8>>,
value => _assert_fail,
module => <<"glisten"/utf8>>,
function => <<"serve_ssl"/utf8>>,
line => 178})
end,
_pipe = Port,
_pipe@1 = glisten@ssl:listen(
_pipe,
[{certfile, Certfile}, {keyfile, Keyfile}]
),
_pipe@2 = gleam@result:map_error(_pipe@1, fun(Err) -> case Err of
closed ->
listener_closed;
timeout ->
listener_timeout;
Err@1 ->
{system_error, Err@1}
end end),
_pipe@5 = gleam@result:then(
_pipe@2,
fun(Socket) ->
_pipe@3 = {pool,
Socket,
convert_loop(erlang:element(3, Handler)),
erlang:element(5, Handler),
erlang:element(2, Handler),
erlang:element(4, Handler),
glisten@socket@transport:ssl()},
_pipe@4 = glisten@acceptor:start_pool(_pipe@3),
gleam@result:map_error(_pipe@4, fun(Err@2) -> case Err@2 of
init_timeout ->
acceptor_timeout;
{init_failed, Reason} ->
{acceptor_failed, Reason};
{init_crashed, Reason@1} ->
{acceptor_crashed, Reason@1}
end end)
end
),
gleam@result:replace(_pipe@5, nil).