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mist

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a misty Gleam web server

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mist src mist_ffi.erl
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src/mist_ffi.erl 

-module(mist_ffi).



-export([binary_match/2, decode_packet/3, file_open/1, string_to_int/2, hpack_decode/2,

         hpack_encode/2, hpack_new_max_table_size/2]).



decode_packet(Type, Packet, Opts) ->

  case erlang:decode_packet(Type, Packet, Opts) of

    {ok, http_eoh, Rest} ->

      {ok, {end_of_headers, Rest}};

    {ok, {http_request, <<"PRI">>, '*', {2, 0}}, Rest} ->

      {ok, {http2_upgrade, Rest}};

    {ok, Binary, Rest} ->

      {ok, {binary_data, Binary, Rest}};

    {more, undefined} ->

      {ok, {more_data, none}};

    {more, Length} ->

      {ok, {more_data, {some, Length}}};

    {error, Reason} ->

      {error, Reason}

  end.



binary_match(Source, Pattern) ->

  case binary:match(Source, Pattern) of

    {Before, After} ->

      {ok, {Before, After}};

    nomatch ->

      {error, nil}

  end.



string_to_int(String, Base) ->

  try

    {ok, erlang:list_to_integer(String, Base)}

  catch

    error:badarg ->

      {error, nil}

  end.



file_open(Path) ->

  case file:open(Path, [raw]) of

    {ok, Fd} ->

      {ok, Fd};

    {error, enoent} ->

      {error, no_entry};

    {error, eacces} ->

      {error, no_access};

    {error, eisdir} ->

      {error, is_dir};

    _ ->

      {error, unknown_file_error}

  end.



hpack_decode(Context, Bin) ->

  case hpack:decode(Bin, Context) of

    {ok, {Headers, NewContext}} ->

      {ok, {Headers, NewContext}};

    {error, compression_error} ->

      {error, {hpack_error, compression}};

    {error, {compression_error, {bad_header_packet, Binary}}} ->

      {error, {hpack_error, {bad_header_packet, Binary}}}

  end.



hpack_encode(Context, Headers) ->

  hpack:encode(Headers, Context).



hpack_new_max_table_size(Context, Size) ->

  hpack:new_max_table_size(Size, Context).