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%% Feel free to use, reuse and abuse the code in this file.
-module(http_handler_multipart).
-behaviour(cowboy_http_handler).
-export([init/3, handle/2, terminate/2]).
init({_Transport, http}, Req, []) ->
{ok, Req, {}}.
handle(Req, State) ->
{Result, Req2} = acc_multipart(Req, []),
{ok, Req3} = cowboy_req:reply(200, [], term_to_binary(Result), Req2),
{ok, Req3, State}.
terminate(_Req, _State) ->
ok.
acc_multipart(Req, Acc) ->
{Result, Req2} = cowboy_req:multipart_data(Req),
acc_multipart(Req2, Acc, Result).
acc_multipart(Req, Acc, {headers, Headers}) ->
acc_multipart(Req, [{Headers, []}|Acc]);
acc_multipart(Req, [{Headers, BodyAcc}|Acc], {body, Data}) ->
acc_multipart(Req, [{Headers, [Data|BodyAcc]}|Acc]);
acc_multipart(Req, [{Headers, BodyAcc}|Acc], end_of_part) ->
acc_multipart(Req, [{Headers, list_to_binary(lists:reverse(BodyAcc))}|Acc]);
acc_multipart(Req, Acc, eof) ->
{lists:reverse(Acc), Req}.
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