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yaws_api.erl
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yaws_api.erl
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%%----------------------------------------------------------------------
%%% File : yaws_api.erl
%%% Author : Claes Wikstrom <klacke@hyber.org>
%%% Purpose :
%%% Created : 24 Jan 2002 by Claes Wikstrom <klacke@hyber.org>
%%%----------------------------------------------------------------------
-module(yaws_api).
-author('klacke@hyber.org').
-include("../include/yaws.hrl").
-include("../include/yaws_api.hrl").
-include("yaws_debug.hrl").
-export([parse_query/1, parse_post/1,
parse_multipart_post/1, parse_multipart_post/2,
parse_multipart/2, parse_multipart/3]).
-export([code_to_phrase/1, ssi/2, redirect/1]).
-export([setcookie/2, setcookie/3, setcookie/4, setcookie/5, setcookie/6]).
-deprecated([{setcookie, 2, eventually},
{setcookie, 3, eventually},
{setcookie, 4, eventually},
{setcookie, 5, eventually},
{setcookie, 6, eventually}]).
-export([set_cookie/3]).
-export([pre_ssi_files/2, pre_ssi_string/1, pre_ssi_string/2,
set_content_type/1,
htmlize/1, htmlize_char/1, f/2, fl/1]).
-export([find_cookie_val/2, secs/0,
url_decode/1, url_decode_q_split/1, url_decode_with_encoding/2,
url_encode/1, parse_url/1, parse_url/2, format_url/1,
format_partial_url/2]).
-export([is_absolute_URI/1]).
-export([path_norm/1, path_norm_reverse/1,
sanitize_file_name/1]).
-export([get_line/1, mime_type/1, mime_type/2]).
-export([stream_chunk_deliver/2, stream_chunk_deliver_blocking/2,
stream_chunk_end/1]).
-export([stream_process_deliver/2, stream_process_deliver_chunk/2,
stream_process_deliver_final_chunk/2, stream_process_end/2]).
-export([websocket_send/2, websocket_close/1, websocket_close/2]).
-export([get_sslsocket/1]).
-export([new_cookie_session/1, new_cookie_session/2, new_cookie_session/3,
cookieval_to_opaque/1, request_url/1,
print_cookie_sessions/0,
replace_cookie_session/2, replace_cookie_session/3,
delete_cookie_session/1]).
-export([getconf/0,
setconf/2,
get_listen_port/1,
embedded_start_conf/1, embedded_start_conf/2,
embedded_start_conf/3, embedded_start_conf/4]).
-export([set_status_code/1, reformat_header/1, reformat_header/2,
reformat_request/1, reformat_response/1, reformat_url/1]).
-export([set_trace/1,
set_tty_trace/1,
set_access_log/1]).
-export([call_cgi/2, call_cgi/3]).
-export([call_fcgi_responder/1, call_fcgi_responder/2,
call_fcgi_authorizer/1, call_fcgi_authorizer/2]).
-export([ehtml_expand/1, ehtml_expander/1, ehtml_apply/2,
ehtml_expander_test/0]).
-export([parse_set_cookie/1, parse_cookie/1, format_set_cookie/1,
format_cookie/1, postvar/2, queryvar/2, getvar/2]).
-export([binding/1,binding_exists/1,
dir_listing/1, dir_listing/2, redirect_self/1]).
-export([arg_clisock/1, arg_client_ip_port/1, arg_headers/1, arg_req/1,
arg_orig_req/1, arg_clidata/1, arg_server_path/1, arg_querydata/1,
arg_appmoddata/1, arg_docroot/1, arg_docroot_mount/1, arg_fullpath/1,
arg_cont/1, arg_state/1, arg_pid/1, arg_opaque/1, arg_appmod_prepath/1,
arg_prepath/1,
arg_pathinfo/1]).
-export([http_request_method/1, http_request_path/1, http_request_version/1,
http_response_version/1, http_response_status/1,
http_response_phrase/1,
headers_connection/1, headers_accept/1, headers_host/1,
headers_if_modified_since/1, headers_if_match/1,
headers_if_none_match/1,
headers_if_range/1, headers_if_unmodified_since/1, headers_range/1,
headers_referer/1, headers_user_agent/1, headers_accept_ranges/1,
headers_cookie/1, headers_keep_alive/1, headers_location/1,
headers_content_length/1, headers_content_type/1,
headers_content_encoding/1, headers_authorization/1,
headers_transfer_encoding/1, headers_x_forwarded_for/1,
headers_other/1]).
-export([set_header/2, set_header/3, merge_header/2, merge_header/3,
get_header/2, get_header/3, delete_header/2]).
-import(lists, [flatten/1, reverse/1]).
%% These are a bunch of accessor functions that are useful inside
%% yaws scripts.
arg_clisock(#arg{clisock = X}) -> X.
arg_client_ip_port(#arg{client_ip_port = X}) -> X.
arg_headers(#arg{headers = X}) -> X.
arg_req(#arg{req = X}) -> X.
arg_orig_req(#arg{orig_req = X}) -> X.
arg_clidata(#arg{clidata = X}) -> X.
arg_server_path(#arg{server_path = X}) -> X.
arg_querydata(#arg{querydata = X}) -> X.
arg_appmoddata(#arg{appmoddata = X}) -> X.
arg_docroot(#arg{docroot = X}) -> X.
arg_docroot_mount(#arg{docroot_mount = X}) -> X.
arg_fullpath(#arg{fullpath = X}) -> X.
arg_cont(#arg{cont = X}) -> X.
arg_state(#arg{state = X}) -> X.
arg_pid(#arg{pid = X}) -> X.
arg_opaque(#arg{opaque = X}) -> X.
arg_appmod_prepath(#arg{appmod_prepath = X}) -> X.
arg_prepath(#arg{prepath = X}) -> X.
arg_pathinfo(#arg{pathinfo = X}) -> X.
http_request_method(#http_request{method = X}) -> X.
http_request_path(#http_request{path = X}) -> X.
http_request_version(#http_request{version = X}) -> X.
http_response_version(#http_response{version = X}) -> X.
http_response_status(#http_response{status = X}) -> X.
http_response_phrase(#http_response{phrase = X}) -> X.
headers_connection(#headers{connection = X}) -> X.
headers_accept(#headers{accept = X}) -> X.
headers_host(#headers{host = X}) -> X.
headers_if_modified_since(#headers{if_modified_since = X}) -> X.
headers_if_match(#headers{if_match = X}) -> X.
headers_if_none_match(#headers{if_none_match = X}) -> X.
headers_if_range(#headers{if_range = X}) -> X.
headers_if_unmodified_since(#headers{if_unmodified_since = X}) -> X.
headers_range(#headers{range = X}) -> X.
headers_referer(#headers{referer = X}) -> X.
headers_user_agent(#headers{user_agent = X}) -> X.
headers_accept_ranges(#headers{accept_ranges = X}) -> X.
headers_cookie(#headers{cookie = X}) -> X.
headers_keep_alive(#headers{keep_alive = X}) -> X.
headers_location(#headers{location = X}) -> X.
headers_content_length(#headers{content_length = X}) -> X.
headers_content_type(#headers{content_type = X}) -> X.
headers_content_encoding(#headers{content_encoding = X}) -> X.
headers_authorization(#headers{authorization = X}) -> X.
headers_transfer_encoding(#headers{transfer_encoding = X}) -> X.
headers_x_forwarded_for(#headers{x_forwarded_for = X}) -> X.
headers_other(#headers{other = X}) -> X.
%% parse the command line query data
parse_query(Arg) ->
case get(query_parse) of
undefined ->
Res = case Arg#arg.querydata of
[] -> [];
D -> parse_post_data_urlencoded(D)
end,
put(query_parse, Res),
Res;
Res ->
Res
end.
%% parse url encoded POST data
parse_post(Arg) ->
case get(post_parse) of
undefined ->
H = Arg#arg.headers,
Res = case H#headers.content_type of
"application/x-www-form-urlencoded"++_ ->
case Arg#arg.clidata of
[] -> [];
D -> parse_post_data_urlencoded(D)
end;
_ ->
[]
end,
put(post_parse, Res),
Res;
Res ->
Res
end.
%%
%% Changed implementation of multipart form data. There is a new config
%% parameter called
%%
%% partial_post_size
%%
%% which if set to an integer value
%% will cause the content of the post content to be sent to the out/1
%% function in chunks of this size.
%%
%% It is possible to get the server to maintain a state on behalf of the
%% out/1 user by returning {get_more, Cont, State}.
%%
%%
%% yaws_api:parse_multipart_post/1 will return either:
%%
%% {cont, Cont, Res} where Res is new result(s) from this segment. This
%% indicates that there is more data to come and the out/1 function
%% should return {get_more, Cont, User_state} where User_state might
%% usefully be a File Descriptor.
%%
%% {result, Res} if this is the last (or only) segment.
%%
%% or {error, Reason} if an error occurred during the parsing.
%%
%% Res is a list of {head, {Name, Hdrs}} | {part_body, Binary} | {body, Binary}
%%
%% Example usage could be:
%%
%% <erl>
%%
%% out(A) ->
%% case yaws_api:parse_multipart_post(A) of
%% {cont, Cont, Res} ->
%% St = handle_res(A, Res),
%% {get_more, Cont, St};
%% {result, Res} ->
%% handle_res(A, Res),
%% {html, f("<pre>Done </pre>",[])};
%% {error, Reason} ->
%% {html, f("An error occured: ~p", [Reason])}
%% end.
%%
%% handle_res(A, [{head, {Name, Hdrs}}|T]) ->
%% io:format("head:~p~n",[Name]),
%% handle_res(A, T);
%% handle_res(A, [{part_body, Data}|T]) ->
%% io:format("part_body:~p~n",[Data]),
%% handle_res(A, T);
%% handle_res(A, [{body, Data}|T]) ->
%% io:format("body:~p~n",[Data]),
%% handle_res(A, T);
%% handle_res(A, []) ->
%% io:format("End_res~n").
%%
%% </erl>
parse_multipart_post(Arg) ->
parse_multipart_post(Arg, [list]).
parse_multipart_post(Arg, Options) ->
H = Arg#arg.headers,
case H#headers.content_type of
undefined ->
{error, no_content_type};
"multipart/form-data"++Line ->
case Arg#arg.cont of
{cont, Cont} ->
parse_multipart(un_partial(Arg#arg.clidata), {cont, Cont});
undefined ->
LineArgs = parse_arg_line(Line),
{value, {_, Boundary}} = lists:keysearch("boundary", 1,
LineArgs),
parse_multipart(un_partial(Arg#arg.clidata),
Boundary, Options)
end;
_Other ->
{error, no_multipart_form_data}
end.
un_partial({partial, Bin}) ->
Bin;
un_partial(Bin) ->
Bin.
parse_arg_line(Line) ->
parse_arg_line(Line, []).
parse_arg_line([],Acc) -> Acc;
parse_arg_line([$ |Line], Acc) ->
parse_arg_line(Line, Acc);
parse_arg_line([$;|Line], Acc) ->
{KV,Rest} = parse_arg_key(Line, [], []),
parse_arg_line(Rest, [KV|Acc]).
%%
parse_arg_key([], Key, Value) ->
make_parse_line_reply(Key, Value, []);
parse_arg_key([$;|Line], Key, Value) ->
make_parse_line_reply(Key, Value, [$;|Line]);
parse_arg_key([$ |Line], Key, Value) ->
parse_arg_key(Line, Key, Value);
parse_arg_key([$=|Line], Key, Value) ->
parse_arg_value(Line, Key, Value, false, false);
parse_arg_key([C|Line], Key, Value) ->
parse_arg_key(Line, [C|Key], Value).
%%
%% We need to deal with quotes and initial spaces here.
%% parse_arg_value(String, Key, ValueAcc, InQuoteBool, InValueBool)
%%
parse_arg_value([], Key, Value, _, _) ->
make_parse_line_reply(Key, Value, []);
parse_arg_value([$\\,$"], Key, Value, _, _) ->
make_parse_line_reply(Key, [$\\|Value], []);
parse_arg_value([$\\,$"|Line], Key, Value, Quote, Begun) ->
parse_arg_value(Line, Key, [$"|Value], Quote, Begun);
parse_arg_value([$"|Line], Key, Value, false, _) ->
parse_arg_value(Line, Key, Value, true, true);
parse_arg_value([$"], Key, Value, true, _) ->
make_parse_line_reply(Key, Value, []);
parse_arg_value([$",$;|Line], Key, Value, true, _) ->
make_parse_line_reply(Key, Value, [$;|Line]);
parse_arg_value([$;|Line], Key, Value, false, _) ->
make_parse_line_reply(Key, Value, [$;|Line]);
parse_arg_value([$ |Line], Key, Value, false, true) ->
make_parse_line_reply(Key, Value, Line);
parse_arg_value([$ |Line], Key, Value, false, false) ->
parse_arg_value(Line, Key, Value, false, false);
parse_arg_value([C|Line], Key, Value, Quote, _) ->
parse_arg_value(Line, Key, [C|Value], Quote, true).
%%
make_parse_line_reply(Key, Value, Rest) ->
{{yaws:funreverse(Key, fun yaws:to_lowerchar/1),
lists:reverse(Value)}, Rest}.
-record(mp_parse_state, {
state,
boundary_ctx,
boundary_len,
hdr_end_ctx,
old_data,
data_type
}).
%% Stateful parser of multipart data - allows easy re-entry
parse_multipart(Data, St) ->
parse_multipart(Data, St, [list]).
parse_multipart(Data, St, Options) ->
case parse_multi(Data, St, Options) of
{cont, St2, Res} -> {cont, {cont, St2}, lists:reverse(Res)};
{result, Res} -> {result, lists:reverse(Res)};
{error, Reason} -> {error, Reason}
end.
parse_multi(Data, #mp_parse_state{state=boundary}=ParseState, Acc) ->
%% Find the beginning of the next part or the last boundary
case binary:match(Data, ParseState#mp_parse_state.boundary_ctx) of
{Pos, Len} ->
%% If Pos != 0, ignore data preceding the boundary
case Data of
<<_:Pos/binary, Rest/binary>> when size(Rest) < Len+2 ->
%% Not enough data to tell if it is the last boundary or not
{cont, ParseState#mp_parse_state{old_data=Rest}, Acc};
<<_:Pos/binary, _:Len/binary, "\r\n", Rest/binary>> ->
%% It is not the last boundary, so parse the next part
NPState = ParseState#mp_parse_state{state=start_headers},
parse_multi(Rest, NPState, Acc);
<<_:Pos/binary, _:Len/binary, "--\r\n", _/binary>> ->
%% Match on the last boundary and ignore remaining data
{result, Acc};
<<_:Pos/binary, Boundary:Len/binary, "--", Rest/binary>> when size(Rest) < 2 ->
%% Partial match on the last boundary; need more data
{cont, ParseState#mp_parse_state{old_data = <<Boundary/binary, "--", Rest/binary>>}, Acc};
_ ->
{error, malformed_multipart_post}
end;
nomatch ->
%% No boundary found, request more data. Here we keep just enough
%% data to match on the boundary the next time
DLen = size(Data),
BLen = ParseState#mp_parse_state.boundary_len,
SkipLen = erlang:max(DLen - BLen, 0),
KeepLen = erlang:min(BLen, DLen),
<<_:SkipLen/binary, OldData:KeepLen/binary>> = Data,
{cont, ParseState#mp_parse_state{old_data=OldData}, Acc}
end;
parse_multi(Data, #mp_parse_state{state=start_headers}=ParseState, Acc) ->
parse_multi(Data, ParseState, Acc, [], []);
parse_multi(Data, #mp_parse_state{state=body}=ParseState, Acc) ->
%% Find the end of this part (i.e the next boundary)
case binary:match(Data, ParseState#mp_parse_state.boundary_ctx) of
{Pos, _Len} ->
%% Extract the body and keep the boundary
<<Body:Pos/binary, Rest/binary>> = Data,
BodyData = case ParseState#mp_parse_state.data_type of
list -> binary_to_list(Body);
binary -> Body
end,
NAcc = [{body, BodyData}|Acc],
NParseState = ParseState#mp_parse_state{state=boundary},
parse_multi(Rest, NParseState, NAcc);
nomatch ->
%% No boundary found, request more data.
DLen = size(Data),
BLen = ParseState#mp_parse_state.boundary_len,
SkipLen = erlang:max(DLen - BLen, 0),
KeepLen = erlang:min(BLen, DLen),
<<PartData:SkipLen/binary, OldData:KeepLen/binary>> = Data,
NParseState = ParseState#mp_parse_state{state=body,
old_data=OldData},
BodyData = case ParseState#mp_parse_state.data_type of
list -> binary_to_list(PartData);
binary -> PartData
end,
{cont, NParseState, [{part_body, BodyData}|Acc]}
end;
parse_multi(Data, {cont, #mp_parse_state{old_data=OldData}=ParseState}, _) ->
%% Reentry point
NData = <<OldData/binary, Data/binary>>,
parse_multi(NData, ParseState, []);
parse_multi(Data, Boundary, Options) ->
%% Initial entry point
FullBoundary = list_to_binary(["\r\n--", Boundary]),
BoundaryCtx = binary:compile_pattern(FullBoundary),
HdrEndCtx = binary:compile_pattern(<<"\r\n\r\n">>),
DataType = lists:foldl(fun(_, list) -> list;
(list, _) -> list;
(binary, undefined) -> binary;
(_, Acc) -> Acc
end, undefined, Options),
ParseState = #mp_parse_state{state = boundary,
boundary_ctx = BoundaryCtx,
boundary_len = size(FullBoundary),
hdr_end_ctx = HdrEndCtx,
data_type = DataType},
parse_multi(<<"\r\n", Data/binary>>, ParseState, []).
parse_multi(Data, #mp_parse_state{state=start_headers}=ParseState,
Acc, [], []) ->
%% Find the end of headers for this part
case binary:match(Data, ParseState#mp_parse_state.hdr_end_ctx) of
{_Pos, _Len} ->
%% We have all headers, we can parse it
NParseState = ParseState#mp_parse_state{state=headers},
parse_multi(Data, NParseState, Acc, [], []);
nomatch ->
{cont, ParseState#mp_parse_state{old_data=Data}, Acc}
end;
parse_multi(Data, #mp_parse_state{state=headers}=ParseState, Acc, Name, Hdrs) ->
case erlang:decode_packet(httph_bin, Data, [{packet_size, 16#4000}]) of
{ok, http_eoh, Rest} ->
%% All headers are parsed, get the body now
Head = case Name of
[] -> lists:reverse(Hdrs);
_ -> {Name, lists:reverse(Hdrs)}
end,
NParseState = ParseState#mp_parse_state{state=body},
parse_multi(Rest, NParseState, [{head, Head}|Acc]);
{ok, {http_header, _, Hdr, _, HdrVal}, Rest} when is_atom(Hdr) ->
Header = {case Hdr of
'Content-Type' -> content_type;
Else -> Else
end,
binary_to_list(HdrVal)},
parse_multi(Rest, ParseState, Acc, Name, [Header|Hdrs]);
{ok, {http_header, _, Hdr, _, HdrVal}, Rest} ->
HdrValStr = binary_to_list(HdrVal),
case yaws:to_lower(binary_to_list(Hdr)) of
"content-disposition" ->
"form-data"++Params = HdrValStr,
Parameters = parse_arg_line(Params),
{_, NewName} = lists:keyfind("name", 1, Parameters),
parse_multi(Rest, ParseState, Acc,
NewName, Parameters++Hdrs);
LowerHdr ->
parse_multi(Rest, ParseState, Acc,
Name, [{LowerHdr, HdrValStr}|Hdrs])
end;
_ ->
{error, malformed_multipart_post}
end.
%% parse POST data when ENCTYPE is unset or
%% Content-type: application/x-www-form-urlencoded
%% Bin is the content of ARG#arg.clidata
%% the alternative is
%% Content-type: multipart/form-data; boundary=-------------------7cd1d6371ec
%% which is used for file upload
parse_post_data_urlencoded(Bin) ->
do_parse_spec(Bin, nokey, [], key).
%% It will return a [{Key, Value}] list from the post data
do_parse_spec(<<$%, Hi:8, Lo:8, Tail/binary>>, Last, Cur, State)
when Hi /= $u ->
Hex = yaws:hex_to_integer([Hi, Lo]),
do_parse_spec(Tail, Last, [ Hex | Cur], State);
do_parse_spec(<<$&, Tail/binary>>, _Last , Cur, key) ->
[{lists:reverse(Cur), undefined} |
do_parse_spec(Tail, nokey, [], key)]; %% cont keymode
do_parse_spec(<<$&, Tail/binary>>, Last, Cur, value) ->
V = {Last, lists:reverse(Cur)},
[V | do_parse_spec(Tail, nokey, [], key)];
do_parse_spec(<<$+, Tail/binary>>, Last, Cur, State) ->
do_parse_spec(Tail, Last, [$\s|Cur], State);
do_parse_spec(<<$=, Tail/binary>>, _Last, Cur, key) ->
do_parse_spec(Tail, lists:reverse(Cur), [], value); %% change mode
do_parse_spec(<<$%, $u, A:8, B:8,C:8,D:8, Tail/binary>>,
Last, Cur, State) ->
%% non-standard encoding for Unicode characters: %uxxxx,
Hex = yaws:hex_to_integer([A,B,C,D]),
do_parse_spec(Tail, Last, [ Hex | Cur], State);
do_parse_spec(<<H:8, Tail/binary>>, Last, Cur, State) ->
do_parse_spec(Tail, Last, [H|Cur], State);
do_parse_spec(<<>>, nokey, Cur, _State) ->
[{lists:reverse(Cur), undefined}];
do_parse_spec(<<>>, Last, Cur, _State) ->
[{Last, lists:reverse(Cur)}];
do_parse_spec(undefined,_,_,_) ->
[];
do_parse_spec(QueryList, Last, Cur, State) when is_list(QueryList) ->
do_parse_spec(list_to_binary(QueryList), Last, Cur, State).
code_to_phrase(100) -> "Continue";
code_to_phrase(101) -> "Switching Protocols ";
code_to_phrase(102) -> "Processing";
code_to_phrase(200) -> "OK";
code_to_phrase(201) -> "Created";
code_to_phrase(202) -> "Accepted";
code_to_phrase(203) -> "Non-Authoritative Information";
code_to_phrase(204) -> "No Content";
code_to_phrase(205) -> "Reset Content";
code_to_phrase(206) -> "Partial Content";
code_to_phrase(207) -> "Multi-Status";
code_to_phrase(208) -> "Already Reported";
code_to_phrase(226) -> "IM Used";
code_to_phrase(300) -> "Multiple Choices";
code_to_phrase(301) -> "Moved Permanently";
code_to_phrase(302) -> "Found";
code_to_phrase(303) -> "See Other";
code_to_phrase(304) -> "Not Modified";
code_to_phrase(305) -> "Use Proxy";
code_to_phrase(306) -> "(Unused)";
code_to_phrase(307) -> "Temporary Redirect";
code_to_phrase(308) -> "Permanent Redirect";
code_to_phrase(400) -> "Bad Request";
code_to_phrase(401) -> "Unauthorized";
code_to_phrase(402) -> "Payment Required";
code_to_phrase(403) -> "Forbidden";
code_to_phrase(404) -> "Not Found";
code_to_phrase(405) -> "Method Not Allowed";
code_to_phrase(406) -> "Not Acceptable";
code_to_phrase(407) -> "Proxy Authentication Required";
code_to_phrase(408) -> "Request Timeout";
code_to_phrase(409) -> "Conflict";
code_to_phrase(410) -> "Gone";
code_to_phrase(411) -> "Length Required";
code_to_phrase(412) -> "Precondition Failed";
code_to_phrase(413) -> "Request Entity Too Large";
code_to_phrase(414) -> "Request-URI Too Long";
code_to_phrase(415) -> "Unsupported Media Type";
code_to_phrase(416) -> "Requested Range Not Satisfiable";
code_to_phrase(417) -> "Expectation Failed";
code_to_phrase(418) -> "I'm a teapot";
code_to_phrase(420) -> "Enhance Your Calm";
code_to_phrase(422) -> "Unprocessable Entity";
code_to_phrase(423) -> "Locked";
code_to_phrase(424) -> "Failed Dependency";
code_to_phrase(425) -> "Unordered Collection";
code_to_phrase(426) -> "Upgrade Required";
code_to_phrase(428) -> "Precondition Required";
code_to_phrase(429) -> "Too Many Requests";
code_to_phrase(431) -> "Request Header Fields Too Large";
code_to_phrase(451) -> "Unavailable For Legal Reasons";
code_to_phrase(500) -> "Internal Server Error";
code_to_phrase(501) -> "Not Implemented";
code_to_phrase(502) -> "Bad Gateway";
code_to_phrase(503) -> "Service Unavailable";
code_to_phrase(504) -> "Gateway Timeout";
code_to_phrase(505) -> "HTTP Version Not Supported";
code_to_phrase(506) -> "Variant Also Negotiates";
code_to_phrase(507) -> "Insufficient Storage";
code_to_phrase(508) -> "Loop Detected";
code_to_phrase(510) -> "Not Extended";
code_to_phrase(511) -> "Network Authentication Required";
%% Below are some non-HTTP status codes from other protocol standards that
%% we've seen used with HTTP in the wild, so we include them here. HTTP 1.1
%% section 6.1.1 allows for this sort of extensibility, but we recommend
%% sticking with the HTTP status codes above for maximal portability and
%% interoperability.
%%
code_to_phrase(452) -> "Insufficient Storage Space"; % from FTP (RFC 959)
code_to_phrase(453) -> "Not Enough Bandwidth". % from RTSP (RFC 2326)
%%
%% server side include
%%
ssi(DocRoot, Files) ->
L = lists:map(fun(F) ->
case file:read_file([DocRoot ++ [$/|F]]) of
{ok, Bin} ->
Bin;
{error, Reason} ->
io_lib:format("Cannot include file ~p: ~p",
[F, Reason])
end
end, Files),
{html, L}.
%% include pre
pre_ssi_files(DocRoot, Files) ->
{html, L} = ssi(DocRoot, Files),
pre_ssi_string(L).
pre_ssi_string(Str) ->
pre_ssi_string(Str, "box").
pre_ssi_string(Str, Class) ->
{html, ["<br><br>\n<div class=\"", Class, "\"> <pre>\n",
htmlize_l(Str),
"\n</pre></div>\n<br>\n\n"]}.
%% convenience
f(Fmt, Args) ->
io_lib:format(Fmt, Args).
fl([Fmt, Arg | Tail]) ->
[f(Fmt, Arg) | fl(Tail)];
fl([]) ->
[].
%% htmlize
htmlize(Bin) when is_binary(Bin) ->
list_to_binary(htmlize_l(binary_to_list(Bin)));
htmlize(List) when is_list(List) ->
htmlize_l(List).
htmlize_char($>) ->
<<">">>;
htmlize_char($<) ->
<<"<">>;
htmlize_char($&) ->
<<"&">>;
htmlize_char($") ->
<<""">>;
htmlize_char(X) ->
X.
%% htmlize list (usually much more efficient than above)
htmlize_l(List) ->
htmlize_l(List, []).
htmlize_l([], Acc) -> lists:reverse(Acc);
htmlize_l([$>|Tail], Acc) ->
htmlize_l(Tail, [$;,$t,$g,$&|Acc]);
htmlize_l([$<|Tail], Acc) ->
htmlize_l(Tail, [$;,$t,$l,$&|Acc]);
htmlize_l([$&|Tail], Acc) ->
htmlize_l(Tail, [$;,$p,$m,$a,$&|Acc]);
htmlize_l([$"|Tail], Acc) ->
htmlize_l(Tail, [$; , $t, $o, $u, $q ,$&|Acc]);
htmlize_l([X|Tail], Acc) when is_integer(X) ->
htmlize_l(Tail, [X|Acc]);
htmlize_l([X|Tail], Acc) when is_binary(X) ->
X2 = htmlize_l(binary_to_list(X)),
htmlize_l(Tail, [X2|Acc]);
htmlize_l([X|Tail], Ack) when is_list(X) ->
X2 = htmlize_l(X),
htmlize_l(Tail, [X2|Ack]).
secs() ->
{MS, S, _} = yaws:get_time_tuple(),
(MS * 1000000) + S.
cookie_option(secure) ->
"; Secure";
cookie_option(http_only) ->
"; HttpOnly";
cookie_option(I) ->
throw({badarg, I}).
cookie_option(expires, UTC) when is_tuple(UTC) ->
["; Expires=" | yaws:universal_time_as_string(UTC)];
cookie_option(max_age, Age) when is_integer(Age) ->
V = if Age < 0 -> "0"; true -> integer_to_list(Age) end,
["; Max-Age=" | V];
cookie_option(path, Path) when is_list(Path), Path =/= [] ->
["; Path=" | Path];
cookie_option(domain, Domain) when is_list(Domain), Domain =/= [] ->
["; Domain=" | Domain];
cookie_option(comment, Comment) when is_list(Comment), Comment=/= [] ->
["; Comment=" | Comment];
cookie_option(I, _) ->
throw({badarg, I}).
%% @doc Generate a set_cookie header field tuple.
%% This function is more RFC6265 compliant than setcookie/6 and
%% therefore it deprecates setcookie/6 completely.
set_cookie(Key, Value, Options)
when is_list(Key), is_list(Value), is_list(Options) ->
%% RFC6265 (4.1.1): Name=Value options must come first.
{NV,SV} = lists:foldl(fun
({N,V}, {L1, L2}) -> {[cookie_option(N,V) | L1], L2};
(N, {L1, L2}) -> {L1, [cookie_option(N) | L2]}
end, {[], []}, Options),
{header, {set_cookie, [Key, $=, Value, "; Version=1", NV | SV]}}.
setcookie(Name, Value) ->
{header, {set_cookie, f("~s=~s;", [Name, Value])}}.
setcookie(Name, Value, Path) ->
{header, {set_cookie, f("~s=~s; path=~s", [Name, Value, Path])}}.
setcookie(Name, Value, Path, Expire) ->
setcookie(Name, Value, Path, Expire, [], []).
setcookie(Name, Value, Path, Expire, Domain) ->
setcookie(Name, Value, Path, Expire, Domain,[]).
setcookie(Name, Value, Path, Expire, Domain, Secure) ->
SetDomain = if Domain == [] -> "";
true -> " Domain="++Domain++";"
end,
SetExpire = if Expire == [] -> "";
true -> " Expires="++Expire++";"
end,
SetPath = if Path == [] -> "/";
true -> Path
end,
SetSecure = if Secure == on -> " secure;";
true -> ""
end,
{header, {set_cookie, f("~s=~s;~s~s~s Path=~s",
[Name,Value,SetDomain,SetExpire,
SetSecure, SetPath])}}.
%% This function can be passed the cookie we get in the Arg#arg.headers.cookies
%% to search for a specific cookie
%% return [] if not found
%% Str if found
%% if several cookies with the same name are passed fron the browser,
%% only the first match is returned
find_cookie_val(Name, #arg{}=A) ->
find_cookie_val(Name, (A#arg.headers)#headers.cookie);
find_cookie_val(Name, Cookies) ->
find_cookie_val2(yaws:to_lower(Name), Cookies).
find_cookie_val2(_, []) ->
[];
find_cookie_val2(Name, [Cookie|Rest]) ->
L = parse_cookie(Cookie),
case lists:keyfind(Name, #cookie.key, L) of
#cookie{value=undefined} -> [];
#cookie{value=Value} -> Value;
false -> find_cookie_val2(Name, Rest)
end.
%%
url_decode(Path) ->
url_decode_with_encoding(Path, file:native_name_encoding()).
url_decode_with_encoding(Path, Encoding) ->
{DecPath, QS} = url_decode(Path, []),
DecPath1 = case Encoding of
latin1 ->
DecPath;
utf8 ->
case unicode:characters_to_list(list_to_binary(DecPath)) of
UTF8DecPath when is_list(UTF8DecPath) -> UTF8DecPath;
_ -> DecPath
end
end,
case QS of
[] -> lists:flatten(DecPath1);
_ -> lists:flatten([DecPath1, $?, QS])
end.
url_decode([], Acc) ->
{lists:reverse(Acc), []};
url_decode([$?|Tail], Acc) ->
%% Don't decode the query string here, that is parsed separately.
{lists:reverse(Acc), Tail};
url_decode([$%, Hi, Lo | Tail], Acc) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
url_decode(Tail, [Hex|Acc]);
url_decode([H|T], Acc) when is_integer(H) ->
url_decode(T, [H|Acc]);
%% deep lists
url_decode([H|T], Acc) when is_list(H) ->
case url_decode(H, Acc) of
{P1, []} ->
{P2, QS} = url_decode(T, []),
{[P1,P2], QS};
{P1, QS} ->
{P1, QS++T}
end.
path_norm(Path) ->
path_norm_reverse(lists:reverse(Path)).
path_norm_reverse("/" ++ T) -> start_dir(0, "/", T);
path_norm_reverse( T) -> start_dir(0, "", T).
start_dir(N, Path, [$\\|T] ) -> start_dir(N, Path, [$/|T]);
start_dir(N, Path, ".." ) -> rest_dir(N, Path, "");
start_dir(N, Path, "/" ++ T ) -> start_dir(N , Path, T);
start_dir(N, Path, "./" ++ T ) -> start_dir(N , Path, T);
start_dir(N, Path, ".\\" ++ T ) -> start_dir(N , Path, T);
start_dir(N, Path, "../" ++ T ) -> start_dir(N + 1, Path, T);
start_dir(N, Path, "..\\" ++ T ) -> start_dir(N + 1, Path, T);
start_dir(N, Path, T ) -> rest_dir (N , Path, T).
rest_dir (_N, Path, [] ) -> case Path of
[] -> "/";
_ -> Path
end;
rest_dir (0, Path, [ $/ | T ] ) -> start_dir(0 , [ $/ | Path ], T);
rest_dir (N, Path, [ $/ | T ] ) -> start_dir(N - 1, Path , T);
rest_dir (N, Path, [ $\\ | T ] ) -> rest_dir(N, Path, [$/|T]);
rest_dir (0, Path, [ H | T ] ) -> rest_dir (0 , [ H | Path ], T);
rest_dir (N, Path, [ _H | T ] ) -> rest_dir (N , Path , T).
%% url decode the path and return {Path, QueryPart}
url_decode_q_split(Path) ->
{DecPath, QS} = url_decode_q_split(Path, []),
case file:native_name_encoding() of
latin1 ->
{DecPath, QS};
utf8 ->
case unicode:characters_to_list(list_to_binary(DecPath)) of
UTF8DecPath when is_list(UTF8DecPath) -> {UTF8DecPath, QS};
_ -> {DecPath, QS}
end
end.
url_decode_q_split([$%, Hi, Lo | Tail], Ack) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
if Hex == 0 -> exit(badurl);
true -> ok
end,
url_decode_q_split(Tail, [Hex|Ack]);
url_decode_q_split([$?|T], Ack) ->
%% Don't decode the query string here,
%% that is parsed separately.
{path_norm_reverse(Ack), T};
url_decode_q_split([H|T], Ack) when H /= 0 ->
url_decode_q_split(T, [H|Ack]);
url_decode_q_split([], Ack) ->
{path_norm_reverse(Ack), []}.
url_encode(URL) when is_list(URL) ->
Bin = case file:native_name_encoding() of
latin1 -> list_to_binary(URL);
utf8 -> unicode:characters_to_binary(URL)
end,
%% ReservedChars = "!*'();:@&=+$,/?%#[]",
UnreservedChars = sets:from_list("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz"
"0123456789-_.~"),
flatten([url_encode_byte(Byte, UnreservedChars) || <<Byte>> <= Bin]).
url_encode_byte($:, _) -> $:; % FIXME: both : and / should be encoded, but
url_encode_byte($/, _) -> $/; % too much code currently assumes they're not
url_encode_byte(Byte, UnreservedChars) ->
case sets:is_element(Byte, UnreservedChars) of
true -> Byte;
false ->
case yaws:integer_to_hex(Byte) of
[X, Y] -> [$%, X, Y];
[X] -> [$%, $0, X]
end
end.
redirect(Url) -> [{redirect, Url}].
is_nb_space(X) ->
lists:member(X, [$\s, $\t]).
%% ret: {line, Line, Trail} | {lastline, Line, Trail} | need_more
get_line(L) ->
get_line(L, []).
get_line("\r\n\r\n" ++ Tail, Cur) ->
{lastline, lists:reverse(Cur), Tail};
get_line("\r\n" ++ Tail, Cur) when Tail /= [] ->
case is_nb_space(hd(Tail)) of
true -> %% multiline ... continue
get_line(Tail, [$\n, $\r | Cur]);
false ->
{line, lists:reverse(Cur), Tail}
end;
get_line("\r\n", Cur) ->
{line, lists:reverse(Cur), []};
get_line([H|T], Cur) ->
get_line(T, [H|Cur]);
get_line([], _) ->
need_more.
mime_type(FileName) ->
mime_type(get(sc), FileName).
mime_type(S, FileName) ->
case filename:extension(FileName) of
[_|T] -> element(2, mime_types:t(S, T));
[] -> element(2, mime_types:t(S, []))
end.
%% Asynchronously delivery
stream_chunk_deliver(YawsPid, Data) ->
YawsPid ! {streamcontent, Data}.
%% Use timeout here to guard against bug in the SSL application
%% that apparently does not close the socket in between
%% ssl_esock and erlang (FIN_WAIT2 resp. CLOSE_WAIT).
%% Thus, the stream process hangs forever...
-define(STREAM_GARBAGE_TIMEOUT, 3600000). % 1 hour
%% Synchronous (on ultimate gen_tcp:send) delivery
%% Returns: ok | {error, Rsn}
stream_chunk_deliver_blocking(YawsPid, Data) ->
Ref = erlang:monitor(process, YawsPid),
YawsPid ! {streamcontent_with_ack, self(), Data},
receive
{YawsPid, streamcontent_ack} ->
erlang:demonitor(Ref),
%% flush incase a DOWN message was sent before the demonitor call
receive
{'DOWN', Ref, _, _, _} ->
ok
after 0 ->
ok
end;
{'DOWN', Ref, _, _, Info} ->
{error, {ypid_crash, Info}}
after ?STREAM_GARBAGE_TIMEOUT ->
%% Killing (unless this function is caught) process tree but
%% NOTE that as this is probably due to the OTP SSL application
%% not managing to close the socket (FIN_WAIT2
%% resp. CLOSE_WAIT) the SSL process is not killed (it traps
%% exit signals) and thus we will leak one file descriptor.
error_logger:error_msg(
"~p:stream_chunk_deliver_blocking/2 STREAM_GARBAGE_TIMEOUT "
"(default 1 hour). Killing ~p", [?MODULE, YawsPid]),
erlang:error(stream_garbage_timeout, [YawsPid, Data])
end.
stream_chunk_end(YawsPid) ->
YawsPid ! endofstreamcontent.
stream_process_deliver({ssl, SslSock}, IoList) ->
ssl:send(SslSock, IoList);
stream_process_deliver(Sock, IoList) ->
gen_tcp:send(Sock, IoList).
stream_process_deliver_chunk(Sock, IoList) ->
Chunk = case erlang:iolist_size(IoList) of
0 ->
stream_process_deliver_final_chunk(Sock, IoList);
S ->
[yaws:integer_to_hex(S), "\r\n", IoList, "\r\n"]
end,
stream_process_deliver(Sock, Chunk).
stream_process_deliver_final_chunk(Sock, IoList) ->
Chunk = case erlang:iolist_size(IoList) of
0 ->