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multipartkit

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Multipart body parsing and generation primitives for Gleam on Erlang and JavaScript targets

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multipartkit src multipartkit@infer.erl
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src/multipartkit@infer.erl 

-module(multipartkit@infer).

-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch, inline]).

-define(FILEPATH, "src/multipartkit/infer.gleam").

-export([default_inferer/0, content_type_from_filename/1, content_type_from_bytes/1]).

-export_type([inferer/0]).



-if(?OTP_RELEASE >= 27).

-define(MODULEDOC(Str), -moduledoc(Str)).

-define(DOC(Str), -doc(Str)).

-else.

-define(MODULEDOC(Str), -compile([])).

-define(DOC(Str), -compile([])).

-endif.



-type inferer() :: {inferer,

        fun((binary()) -> gleam@option:option(binary())),

        fun((bitstring()) -> gleam@option:option(binary()))}.



-file("src/multipartkit/infer.gleam", 58).

-spec noop_filename(binary()) -> gleam@option:option(binary()).

noop_filename(_) ->

    none.



-file("src/multipartkit/infer.gleam", 62).

-spec noop_bytes(bitstring()) -> gleam@option:option(binary()).

noop_bytes(_) ->

    none.



-file("src/multipartkit/infer.gleam", 54).

?DOC(

    " Inferer that always returns `None`.\n"

    "\n"

    " `add_file_auto` uses this and therefore always emits\n"

    " `application/octet-stream` unless the host swaps in a real inferer via\n"

    " `add_file_auto_with`.\n"

).

-spec default_inferer() -> inferer().

default_inferer() ->

    {inferer, fun noop_filename/1, fun noop_bytes/1}.



-file("src/multipartkit/infer.gleam", 71).

?DOC(

    " Optional content-type inference from a filename.\n"

    "\n"

    " The default v0.1.0 implementation always returns `None`. Wire `mimetype`\n"

    " (or another inferer) in via `form.add_file_auto_with` to enable\n"

    " inference.\n"

).

-spec content_type_from_filename(binary()) -> gleam@option:option(binary()).

content_type_from_filename(Filename) ->

    (erlang:element(2, default_inferer()))(Filename).



-file("src/multipartkit/infer.gleam", 78).

?DOC(

    " Optional content-type inference from a body byte sequence.\n"

    "\n"

    " Same default-`None` policy as `content_type_from_filename`.\n"

).

-spec content_type_from_bytes(bitstring()) -> gleam@option:option(binary()).

content_type_from_bytes(Body) ->

    (erlang:element(3, default_inferer()))(Body).