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diff --git a/apps/mochiweb/src/mochiweb_multipart.erl b/apps/mochiweb/src/mochiweb_multipart.erl
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+%% @author Bob Ippolito <bob@mochimedia.com>
+%% @copyright 2007 Mochi Media, Inc.
+
+%% @doc Utilities for parsing multipart/form-data.
+
+-module(mochiweb_multipart).
+-author('bob@mochimedia.com').
+
+-export([parse_form/1, parse_form/2]).
+-export([parse_multipart_request/2]).
+-export([test/0]).
+
+-define(CHUNKSIZE, 4096).
+
+-record(mp, {state, boundary, length, buffer, callback, req}).
+
+%% TODO: DOCUMENT THIS MODULE.
+
+parse_form(Req) ->
+ parse_form(Req, fun default_file_handler/2).
+
+parse_form(Req, FileHandler) ->
+ Callback = fun (Next) -> parse_form_outer(Next, FileHandler, []) end,
+ {_, _, Res} = parse_multipart_request(Req, Callback),
+ Res.
+
+parse_form_outer(eof, _, Acc) ->
+ lists:reverse(Acc);
+parse_form_outer({headers, H}, FileHandler, State) ->
+ {"form-data", H1} = proplists:get_value("content-disposition", H),
+ Name = proplists:get_value("name", H1),
+ Filename = proplists:get_value("filename", H1),
+ case Filename of
+ undefined ->
+ fun (Next) ->
+ parse_form_value(Next, {Name, []}, FileHandler, State)
+ end;
+ _ ->
+ ContentType = proplists:get_value("content-type", H),
+ Handler = FileHandler(Filename, ContentType),
+ fun (Next) ->
+ parse_form_file(Next, {Name, Handler}, FileHandler, State)
+ end
+ end.
+
+parse_form_value(body_end, {Name, Acc}, FileHandler, State) ->
+ Value = binary_to_list(iolist_to_binary(lists:reverse(Acc))),
+ State1 = [{Name, Value} | State],
+ fun (Next) -> parse_form_outer(Next, FileHandler, State1) end;
+parse_form_value({body, Data}, {Name, Acc}, FileHandler, State) ->
+ Acc1 = [Data | Acc],
+ fun (Next) -> parse_form_value(Next, {Name, Acc1}, FileHandler, State) end.
+
+parse_form_file(body_end, {Name, Handler}, FileHandler, State) ->
+ Value = Handler(eof),
+ State1 = [{Name, Value} | State],
+ fun (Next) -> parse_form_outer(Next, FileHandler, State1) end;
+parse_form_file({body, Data}, {Name, Handler}, FileHandler, State) ->
+ H1 = Handler(Data),
+ fun (Next) -> parse_form_file(Next, {Name, H1}, FileHandler, State) end.
+
+default_file_handler(Filename, ContentType) ->
+ default_file_handler_1(Filename, ContentType, []).
+
+default_file_handler_1(Filename, ContentType, Acc) ->
+ fun(eof) ->
+ Value = iolist_to_binary(lists:reverse(Acc)),
+ {Filename, ContentType, Value};
+ (Next) ->
+ default_file_handler_1(Filename, ContentType, [Next | Acc])
+ end.
+
+parse_multipart_request(Req, Callback) ->
+ %% TODO: Support chunked?
+ Length = list_to_integer(Req:get_header_value("content-length")),
+ Boundary = iolist_to_binary(
+ get_boundary(Req:get_header_value("content-type"))),
+ Prefix = <<"\r\n--", Boundary/binary>>,
+ BS = byte_size(Boundary),
+ Chunk = read_chunk(Req, Length),
+ Length1 = Length - byte_size(Chunk),
+ <<"--", Boundary:BS/binary, "\r\n", Rest/binary>> = Chunk,
+ feed_mp(headers, flash_multipart_hack(#mp{boundary=Prefix,
+ length=Length1,
+ buffer=Rest,
+ callback=Callback,
+ req=Req})).
+
+parse_headers(<<>>) ->
+ [];
+parse_headers(Binary) ->
+ parse_headers(Binary, []).
+
+parse_headers(Binary, Acc) ->
+ case find_in_binary(<<"\r\n">>, Binary) of
+ {exact, N} ->
+ <<Line:N/binary, "\r\n", Rest/binary>> = Binary,
+ parse_headers(Rest, [split_header(Line) | Acc]);
+ not_found ->
+ lists:reverse([split_header(Binary) | Acc])
+ end.
+
+split_header(Line) ->
+ {Name, [$: | Value]} = lists:splitwith(fun (C) -> C =/= $: end,
+ binary_to_list(Line)),
+ {string:to_lower(string:strip(Name)),
+ mochiweb_util:parse_header(Value)}.
+
+read_chunk(Req, Length) when Length > 0 ->
+ case Length of
+ Length when Length < ?CHUNKSIZE ->
+ Req:recv(Length);
+ _ ->
+ Req:recv(?CHUNKSIZE)
+ end.
+
+read_more(State=#mp{length=Length, buffer=Buffer, req=Req}) ->
+ Data = read_chunk(Req, Length),
+ Buffer1 = <<Buffer/binary, Data/binary>>,
+ flash_multipart_hack(State#mp{length=Length - byte_size(Data),
+ buffer=Buffer1}).
+
+flash_multipart_hack(State=#mp{length=0, buffer=Buffer, boundary=Prefix}) ->
+ %% http://code.google.com/p/mochiweb/issues/detail?id=22
+ %% Flash doesn't terminate multipart with \r\n properly so we fix it up here
+ PrefixSize = size(Prefix),
+ case size(Buffer) - (2 + PrefixSize) of
+ Seek when Seek >= 0 ->
+ case Buffer of
+ <<_:Seek/binary, Prefix:PrefixSize/binary, "--">> ->
+ Buffer1 = <<Buffer/binary, "\r\n">>,
+ State#mp{buffer=Buffer1};
+ _ ->
+ State
+ end;
+ _ ->
+ State
+ end;
+flash_multipart_hack(State) ->
+ State.
+
+feed_mp(headers, State=#mp{buffer=Buffer, callback=Callback}) ->
+ {State1, P} = case find_in_binary(<<"\r\n\r\n">>, Buffer) of
+ {exact, N} ->
+ {State, N};
+ _ ->
+ S1 = read_more(State),
+ %% Assume headers must be less than ?CHUNKSIZE
+ {exact, N} = find_in_binary(<<"\r\n\r\n">>,
+ S1#mp.buffer),
+ {S1, N}
+ end,
+ <<Headers:P/binary, "\r\n\r\n", Rest/binary>> = State1#mp.buffer,
+ NextCallback = Callback({headers, parse_headers(Headers)}),
+ feed_mp(body, State1#mp{buffer=Rest,
+ callback=NextCallback});
+feed_mp(body, State=#mp{boundary=Prefix, buffer=Buffer, callback=Callback}) ->
+ Boundary = find_boundary(Prefix, Buffer),
+ case Boundary of
+ {end_boundary, Start, Skip} ->
+ <<Data:Start/binary, _:Skip/binary, Rest/binary>> = Buffer,
+ C1 = Callback({body, Data}),
+ C2 = C1(body_end),
+ {State#mp.length, Rest, C2(eof)};
+ {next_boundary, Start, Skip} ->
+ <<Data:Start/binary, _:Skip/binary, Rest/binary>> = Buffer,
+ C1 = Callback({body, Data}),
+ feed_mp(headers, State#mp{callback=C1(body_end),
+ buffer=Rest});
+ {maybe, Start} ->
+ <<Data:Start/binary, Rest/binary>> = Buffer,
+ feed_mp(body, read_more(State#mp{callback=Callback({body, Data}),
+ buffer=Rest}));
+ not_found ->
+ {Data, Rest} = {Buffer, <<>>},
+ feed_mp(body, read_more(State#mp{callback=Callback({body, Data}),
+ buffer=Rest}))
+ end.
+
+get_boundary(ContentType) ->
+ {"multipart/form-data", Opts} = mochiweb_util:parse_header(ContentType),
+ case proplists:get_value("boundary", Opts) of
+ S when is_list(S) ->
+ S
+ end.
+
+find_in_binary(B, Data) when size(B) > 0 ->
+ case size(Data) - size(B) of
+ Last when Last < 0 ->
+ partial_find(B, Data, 0, size(Data));
+ Last ->
+ find_in_binary(B, size(B), Data, 0, Last)
+ end.
+
+find_in_binary(B, BS, D, N, Last) when N =< Last->
+ case D of
+ <<_:N/binary, B:BS/binary, _/binary>> ->
+ {exact, N};
+ _ ->
+ find_in_binary(B, BS, D, 1 + N, Last)
+ end;
+find_in_binary(B, BS, D, N, Last) when N =:= 1 + Last ->
+ partial_find(B, D, N, BS - 1).
+
+partial_find(_B, _D, _N, 0) ->
+ not_found;
+partial_find(B, D, N, K) ->
+ <<B1:K/binary, _/binary>> = B,
+ case D of
+ <<_Skip:N/binary, B1:K/binary>> ->
+ {partial, N, K};
+ _ ->
+ partial_find(B, D, 1 + N, K - 1)
+ end.
+
+find_boundary(Prefix, Data) ->
+ case find_in_binary(Prefix, Data) of
+ {exact, Skip} ->
+ PrefixSkip = Skip + size(Prefix),
+ case Data of
+ <<_:PrefixSkip/binary, "\r\n", _/binary>> ->
+ {next_boundary, Skip, size(Prefix) + 2};
+ <<_:PrefixSkip/binary, "--\r\n", _/binary>> ->
+ {end_boundary, Skip, size(Prefix) + 4};
+ _ when size(Data) < PrefixSkip + 4 ->
+ %% Underflow
+ {maybe, Skip};
+ _ ->
+ %% False positive
+ not_found
+ end;
+ {partial, Skip, Length} when (Skip + Length) =:= size(Data) ->
+ %% Underflow
+ {maybe, Skip};
+ _ ->
+ not_found
+ end.
+
+with_socket_server(ServerFun, ClientFun) ->
+ {ok, Server} = mochiweb_socket_server:start([{ip, "127.0.0.1"},
+ {port, 0},
+ {loop, ServerFun}]),
+ Port = mochiweb_socket_server:get(Server, port),
+ {ok, Client} = gen_tcp:connect("127.0.0.1", Port,
+ [binary, {active, false}]),
+ Res = (catch ClientFun(Client)),
+ mochiweb_socket_server:stop(Server),
+ Res.
+
+fake_request(Socket, ContentType, Length) ->
+ mochiweb_request:new(Socket,
+ 'POST',
+ "/multipart",
+ {1,1},
+ mochiweb_headers:make(
+ [{"content-type", ContentType},
+ {"content-length", Length}])).
+
+test_callback(Expect, [Expect | Rest]) ->
+ case Rest of
+ [] ->
+ ok;
+ _ ->
+ fun (Next) -> test_callback(Next, Rest) end
+ end;
+test_callback({body, Got}, [{body, Expect} | Rest]) ->
+ GotSize = size(Got),
+ <<Got:GotSize/binary, Expect1/binary>> = Expect,
+ fun (Next) -> test_callback(Next, [{body, Expect1} | Rest]) end.
+
+test_parse3() ->
+ ContentType = "multipart/form-data; boundary=---------------------------7386909285754635891697677882",
+ BinContent = <<"-----------------------------7386909285754635891697677882\r\nContent-Disposition: form-data; name=\"hidden\"\r\n\r\nmultipart message\r\n-----------------------------7386909285754635891697677882\r\nContent-Disposition: form-data; name=\"file\"; filename=\"test_file.txt\"\r\nContent-Type: text/plain\r\n\r\nWoo multiline text file\n\nLa la la\r\n-----------------------------7386909285754635891697677882--\r\n">>,
+ Expect = [{headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "hidden"}]}}]},
+ {body, <<"multipart message">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "file"}, {"filename", "test_file.txt"}]}},
+ {"content-type", {"text/plain", []}}]},
+ {body, <<"Woo multiline text file\n\nLa la la">>},
+ body_end,
+ eof],
+ TestCallback = fun (Next) -> test_callback(Next, Expect) end,
+ ServerFun = fun (Socket) ->
+ ok = gen_tcp:send(Socket, BinContent),
+ exit(normal)
+ end,
+ ClientFun = fun (Socket) ->
+ Req = fake_request(Socket, ContentType,
+ byte_size(BinContent)),
+ Res = parse_multipart_request(Req, TestCallback),
+ {0, <<>>, ok} = Res,
+ ok
+ end,
+ ok = with_socket_server(ServerFun, ClientFun),
+ ok.
+
+
+test_parse2() ->
+ ContentType = "multipart/form-data; boundary=---------------------------6072231407570234361599764024",
+ BinContent = <<"-----------------------------6072231407570234361599764024\r\nContent-Disposition: form-data; name=\"hidden\"\r\n\r\nmultipart message\r\n-----------------------------6072231407570234361599764024\r\nContent-Disposition: form-data; name=\"file\"; filename=\"\"\r\nContent-Type: application/octet-stream\r\n\r\n\r\n-----------------------------6072231407570234361599764024--\r\n">>,
+ Expect = [{headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "hidden"}]}}]},
+ {body, <<"multipart message">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "file"}, {"filename", ""}]}},
+ {"content-type", {"application/octet-stream", []}}]},
+ {body, <<>>},
+ body_end,
+ eof],
+ TestCallback = fun (Next) -> test_callback(Next, Expect) end,
+ ServerFun = fun (Socket) ->
+ ok = gen_tcp:send(Socket, BinContent),
+ exit(normal)
+ end,
+ ClientFun = fun (Socket) ->
+ Req = fake_request(Socket, ContentType,
+ byte_size(BinContent)),
+ Res = parse_multipart_request(Req, TestCallback),
+ {0, <<>>, ok} = Res,
+ ok
+ end,
+ ok = with_socket_server(ServerFun, ClientFun),
+ ok.
+
+test_parse_form() ->
+ ContentType = "multipart/form-data; boundary=AaB03x",
+ "AaB03x" = get_boundary(ContentType),
+ Content = mochiweb_util:join(
+ ["--AaB03x",
+ "Content-Disposition: form-data; name=\"submit-name\"",
+ "",
+ "Larry",
+ "--AaB03x",
+ "Content-Disposition: form-data; name=\"files\";"
+ ++ "filename=\"file1.txt\"",
+ "Content-Type: text/plain",
+ "",
+ "... contents of file1.txt ...",
+ "--AaB03x--",
+ ""], "\r\n"),
+ BinContent = iolist_to_binary(Content),
+ ServerFun = fun (Socket) ->
+ ok = gen_tcp:send(Socket, BinContent),
+ exit(normal)
+ end,
+ ClientFun = fun (Socket) ->
+ Req = fake_request(Socket, ContentType,
+ byte_size(BinContent)),
+ Res = parse_form(Req),
+ [{"submit-name", "Larry"},
+ {"files", {"file1.txt", {"text/plain",[]},
+ <<"... contents of file1.txt ...">>}
+ }] = Res,
+ ok
+ end,
+ ok = with_socket_server(ServerFun, ClientFun),
+ ok.
+
+test_parse() ->
+ ContentType = "multipart/form-data; boundary=AaB03x",
+ "AaB03x" = get_boundary(ContentType),
+ Content = mochiweb_util:join(
+ ["--AaB03x",
+ "Content-Disposition: form-data; name=\"submit-name\"",
+ "",
+ "Larry",
+ "--AaB03x",
+ "Content-Disposition: form-data; name=\"files\";"
+ ++ "filename=\"file1.txt\"",
+ "Content-Type: text/plain",
+ "",
+ "... contents of file1.txt ...",
+ "--AaB03x--",
+ ""], "\r\n"),
+ BinContent = iolist_to_binary(Content),
+ Expect = [{headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "submit-name"}]}}]},
+ {body, <<"Larry">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "files"}, {"filename", "file1.txt"}]}},
+ {"content-type", {"text/plain", []}}]},
+ {body, <<"... contents of file1.txt ...">>},
+ body_end,
+ eof],
+ TestCallback = fun (Next) -> test_callback(Next, Expect) end,
+ ServerFun = fun (Socket) ->
+ ok = gen_tcp:send(Socket, BinContent),
+ exit(normal)
+ end,
+ ClientFun = fun (Socket) ->
+ Req = fake_request(Socket, ContentType,
+ byte_size(BinContent)),
+ Res = parse_multipart_request(Req, TestCallback),
+ {0, <<>>, ok} = Res,
+ ok
+ end,
+ ok = with_socket_server(ServerFun, ClientFun),
+ ok.
+
+test_find_boundary() ->
+ B = <<"\r\n--X">>,
+ {next_boundary, 0, 7} = find_boundary(B, <<"\r\n--X\r\nRest">>),
+ {next_boundary, 1, 7} = find_boundary(B, <<"!\r\n--X\r\nRest">>),
+ {end_boundary, 0, 9} = find_boundary(B, <<"\r\n--X--\r\nRest">>),
+ {end_boundary, 1, 9} = find_boundary(B, <<"!\r\n--X--\r\nRest">>),
+ not_found = find_boundary(B, <<"--X\r\nRest">>),
+ {maybe, 0} = find_boundary(B, <<"\r\n--X\r">>),
+ {maybe, 1} = find_boundary(B, <<"!\r\n--X\r">>),
+ P = <<"\r\n-----------------------------16037454351082272548568224146">>,
+ B0 = <<55,212,131,77,206,23,216,198,35,87,252,118,252,8,25,211,132,229,
+ 182,42,29,188,62,175,247,243,4,4,0,59, 13,10,45,45,45,45,45,45,45,
+ 45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,45,
+ 49,54,48,51,55,52,53,52,51,53,49>>,
+ {maybe, 30} = find_boundary(P, B0),
+ ok.
+
+test_find_in_binary() ->
+ {exact, 0} = find_in_binary(<<"foo">>, <<"foobarbaz">>),
+ {exact, 1} = find_in_binary(<<"oo">>, <<"foobarbaz">>),
+ {exact, 8} = find_in_binary(<<"z">>, <<"foobarbaz">>),
+ not_found = find_in_binary(<<"q">>, <<"foobarbaz">>),
+ {partial, 7, 2} = find_in_binary(<<"azul">>, <<"foobarbaz">>),
+ {exact, 0} = find_in_binary(<<"foobarbaz">>, <<"foobarbaz">>),
+ {partial, 0, 3} = find_in_binary(<<"foobar">>, <<"foo">>),
+ {partial, 1, 3} = find_in_binary(<<"foobar">>, <<"afoo">>),
+ ok.
+
+test_flash_parse() ->
+ ContentType = "multipart/form-data; boundary=----------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5",
+ "----------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5" = get_boundary(ContentType),
+ BinContent = <<"------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"Filename\"\r\n\r\nhello.txt\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"success_action_status\"\r\n\r\n201\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"file\"; filename=\"hello.txt\"\r\nContent-Type: application/octet-stream\r\n\r\nhello\n\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"Upload\"\r\n\r\nSubmit Query\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5--">>,
+ Expect = [{headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "Filename"}]}}]},
+ {body, <<"hello.txt">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "success_action_status"}]}}]},
+ {body, <<"201">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "file"}, {"filename", "hello.txt"}]}},
+ {"content-type", {"application/octet-stream", []}}]},
+ {body, <<"hello\n">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "Upload"}]}}]},
+ {body, <<"Submit Query">>},
+ body_end,
+ eof],
+ TestCallback = fun (Next) -> test_callback(Next, Expect) end,
+ ServerFun = fun (Socket) ->
+ ok = gen_tcp:send(Socket, BinContent),
+ exit(normal)
+ end,
+ ClientFun = fun (Socket) ->
+ Req = fake_request(Socket, ContentType,
+ byte_size(BinContent)),
+ Res = parse_multipart_request(Req, TestCallback),
+ {0, <<>>, ok} = Res,
+ ok
+ end,
+ ok = with_socket_server(ServerFun, ClientFun),
+ ok.
+
+test_flash_parse2() ->
+ ContentType = "multipart/form-data; boundary=----------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5",
+ "----------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5" = get_boundary(ContentType),
+ Chunk = iolist_to_binary(string:copies("%", 4096)),
+ BinContent = <<"------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"Filename\"\r\n\r\nhello.txt\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"success_action_status\"\r\n\r\n201\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"file\"; filename=\"hello.txt\"\r\nContent-Type: application/octet-stream\r\n\r\n", Chunk/binary, "\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5\r\nContent-Disposition: form-data; name=\"Upload\"\r\n\r\nSubmit Query\r\n------------ei4GI3GI3Ij5Ef1ae0KM7Ij5ei4Ij5--">>,
+ Expect = [{headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "Filename"}]}}]},
+ {body, <<"hello.txt">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "success_action_status"}]}}]},
+ {body, <<"201">>},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "file"}, {"filename", "hello.txt"}]}},
+ {"content-type", {"application/octet-stream", []}}]},
+ {body, Chunk},
+ body_end,
+ {headers,
+ [{"content-disposition",
+ {"form-data", [{"name", "Upload"}]}}]},
+ {body, <<"Submit Query">>},
+ body_end,
+ eof],
+ TestCallback = fun (Next) -> test_callback(Next, Expect) end,
+ ServerFun = fun (Socket) ->
+ ok = gen_tcp:send(Socket, BinContent),
+ exit(normal)
+ end,
+ ClientFun = fun (Socket) ->
+ Req = fake_request(Socket, ContentType,
+ byte_size(BinContent)),
+ Res = parse_multipart_request(Req, TestCallback),
+ {0, <<>>, ok} = Res,
+ ok
+ end,
+ ok = with_socket_server(ServerFun, ClientFun),
+ ok.
+
+test() ->
+ test_find_in_binary(),
+ test_find_boundary(),
+ test_parse(),
+ test_parse2(),
+ test_parse3(),
+ test_parse_form(),
+ test_flash_parse(),
+ test_flash_parse2(),
+ ok.