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%% Feel free to use, reuse and abuse the code in this file.
-module(http_multipart).
-behaviour(cowboy_http_handler).
-export([init/3, handle/2, terminate/3]).
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(_, _, _) ->
ok.
acc_multipart(Req) ->
acc_multipart(cowboy_req:multipart_data(Req), []).
acc_multipart({headers, Headers, Req}, Acc) ->
acc_multipart(cowboy_req:multipart_data(Req), [{Headers, []}|Acc]);
acc_multipart({body, Data, Req}, [{Headers, BodyAcc}|Acc]) ->
acc_multipart(cowboy_req:multipart_data(Req), [{Headers, [Data|BodyAcc]}|Acc]);
acc_multipart({end_of_part, Req}, [{Headers, BodyAcc}|Acc]) ->
acc_multipart(cowboy_req:multipart_data(Req),
[{Headers, list_to_binary(lists:reverse(BodyAcc))}|Acc]);
acc_multipart({eof, Req}, Acc) ->
{lists:reverse(Acc), Req}.
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