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%% @author Bob Ippolito <bob@mochimedia.com>
%% @copyright 2007 Mochi Media, Inc.
%% @doc Utilities for parsing and quoting.
-module(mochiweb_util).
-author('bob@mochimedia.com').
-export([join/2, quote_plus/1, urlencode/1, parse_qs/1, unquote/1]).
-export([path_split/1]).
-export([urlsplit/1, urlsplit_path/1, urlunsplit/1, urlunsplit_path/1]).
-export([guess_mime/1, parse_header/1]).
-export([shell_quote/1, cmd/1, cmd_string/1, cmd_port/2, cmd_status/1, cmd_status/2]).
-export([record_to_proplist/2, record_to_proplist/3]).
-export([safe_relative_path/1, partition/2]).
-export([parse_qvalues/1, pick_accepted_encodings/3]).
-export([make_io/1]).
-define(PERCENT, 37). % $\%
-define(FULLSTOP, 46). % $\.
-define(IS_HEX(C), ((C >= $0 andalso C =< $9) orelse
(C >= $a andalso C =< $f) orelse
(C >= $A andalso C =< $F))).
-define(QS_SAFE(C), ((C >= $a andalso C =< $z) orelse
(C >= $A andalso C =< $Z) orelse
(C >= $0 andalso C =< $9) orelse
(C =:= ?FULLSTOP orelse C =:= $- orelse C =:= $~ orelse
C =:= $_))).
hexdigit(C) when C < 10 -> $0 + C;
hexdigit(C) when C < 16 -> $A + (C - 10).
unhexdigit(C) when C >= $0, C =< $9 -> C - $0;
unhexdigit(C) when C >= $a, C =< $f -> C - $a + 10;
unhexdigit(C) when C >= $A, C =< $F -> C - $A + 10.
%% @spec partition(String, Sep) -> {String, [], []} | {Prefix, Sep, Postfix}
%% @doc Inspired by Python 2.5's str.partition:
%% partition("foo/bar", "/") = {"foo", "/", "bar"},
%% partition("foo", "/") = {"foo", "", ""}.
partition(String, Sep) ->
case partition(String, Sep, []) of
undefined ->
{String, "", ""};
Result ->
Result
end.
partition("", _Sep, _Acc) ->
undefined;
partition(S, Sep, Acc) ->
case partition2(S, Sep) of
undefined ->
[C | Rest] = S,
partition(Rest, Sep, [C | Acc]);
Rest ->
{lists:reverse(Acc), Sep, Rest}
end.
partition2(Rest, "") ->
Rest;
partition2([C | R1], [C | R2]) ->
partition2(R1, R2);
partition2(_S, _Sep) ->
undefined.
%% @spec safe_relative_path(string()) -> string() | undefined
%% @doc Return the reduced version of a relative path or undefined if it
%% is not safe. safe relative paths can be joined with an absolute path
%% and will result in a subdirectory of the absolute path.
safe_relative_path("/" ++ _) ->
undefined;
safe_relative_path(P) ->
safe_relative_path(P, []).
safe_relative_path("", Acc) ->
case Acc of
[] ->
"";
_ ->
string:join(lists:reverse(Acc), "/")
end;
safe_relative_path(P, Acc) ->
case partition(P, "/") of
{"", "/", _} ->
%% /foo or foo//bar
undefined;
{"..", _, _} when Acc =:= [] ->
undefined;
{"..", _, Rest} ->
safe_relative_path(Rest, tl(Acc));
{Part, "/", ""} ->
safe_relative_path("", ["", Part | Acc]);
{Part, _, Rest} ->
safe_relative_path(Rest, [Part | Acc])
end.
%% @spec shell_quote(string()) -> string()
%% @doc Quote a string according to UNIX shell quoting rules, returns a string
%% surrounded by double quotes.
shell_quote(L) ->
shell_quote(L, [$\"]).
%% @spec cmd_port([string()], Options) -> port()
%% @doc open_port({spawn, mochiweb_util:cmd_string(Argv)}, Options).
cmd_port(Argv, Options) ->
open_port({spawn, cmd_string(Argv)}, Options).
%% @spec cmd([string()]) -> string()
%% @doc os:cmd(cmd_string(Argv)).
cmd(Argv) ->
os:cmd(cmd_string(Argv)).
%% @spec cmd_string([string()]) -> string()
%% @doc Create a shell quoted command string from a list of arguments.
cmd_string(Argv) ->
string:join([shell_quote(X) || X <- Argv], " ").
%% @spec cmd_status([string()]) -> {ExitStatus::integer(), Stdout::binary()}
%% @doc Accumulate the output and exit status from the given application,
%% will be spawned with cmd_port/2.
cmd_status(Argv) ->
cmd_status(Argv, []).
%% @spec cmd_status([string()], [atom()]) -> {ExitStatus::integer(), Stdout::binary()}
%% @doc Accumulate the output and exit status from the given application,
%% will be spawned with cmd_port/2.
cmd_status(Argv, Options) ->
Port = cmd_port(Argv, [exit_status, stderr_to_stdout,
use_stdio, binary | Options]),
try cmd_loop(Port, [])
after catch port_close(Port)
end.
%% @spec cmd_loop(port(), list()) -> {ExitStatus::integer(), Stdout::binary()}
%% @doc Accumulate the output and exit status from a port.
cmd_loop(Port, Acc) ->
receive
{Port, {exit_status, Status}} ->
{Status, iolist_to_binary(lists:reverse(Acc))};
{Port, {data, Data}} ->
cmd_loop(Port, [Data | Acc])
end.
%% @spec join([iolist()], iolist()) -> iolist()
%% @doc Join a list of strings or binaries together with the given separator
%% string or char or binary. The output is flattened, but may be an
%% iolist() instead of a string() if any of the inputs are binary().
join([], _Separator) ->
[];
join([S], _Separator) ->
lists:flatten(S);
join(Strings, Separator) ->
lists:flatten(revjoin(lists:reverse(Strings), Separator, [])).
revjoin([], _Separator, Acc) ->
Acc;
revjoin([S | Rest], Separator, []) ->
revjoin(Rest, Separator, [S]);
revjoin([S | Rest], Separator, Acc) ->
revjoin(Rest, Separator, [S, Separator | Acc]).
%% @spec quote_plus(atom() | integer() | float() | string() | binary()) -> string()
%% @doc URL safe encoding of the given term.
quote_plus(Atom) when is_atom(Atom) ->
quote_plus(atom_to_list(Atom));
quote_plus(Int) when is_integer(Int) ->
quote_plus(integer_to_list(Int));
quote_plus(Binary) when is_binary(Binary) ->
quote_plus(binary_to_list(Binary));
quote_plus(Float) when is_float(Float) ->
quote_plus(mochinum:digits(Float));
quote_plus(String) ->
quote_plus(String, []).
quote_plus([], Acc) ->
lists:reverse(Acc);
quote_plus([C | Rest], Acc) when ?QS_SAFE(C) ->
quote_plus(Rest, [C | Acc]);
quote_plus([$\s | Rest], Acc) ->
quote_plus(Rest, [$+ | Acc]);
quote_plus([C | Rest], Acc) ->
<<Hi:4, Lo:4>> = <<C>>,
quote_plus(Rest, [hexdigit(Lo), hexdigit(Hi), ?PERCENT | Acc]).
%% @spec urlencode([{Key, Value}]) -> string()
%% @doc URL encode the property list.
urlencode(Props) ->
Pairs = lists:foldr(
fun ({K, V}, Acc) ->
[quote_plus(K) ++ "=" ++ quote_plus(V) | Acc]
end, [], Props),
string:join(Pairs, "&").
%% @spec parse_qs(string() | binary()) -> [{Key, Value}]
%% @doc Parse a query string or application/x-www-form-urlencoded.
parse_qs(Binary) when is_binary(Binary) ->
parse_qs(binary_to_list(Binary));
parse_qs(String) ->
parse_qs(String, []).
parse_qs([], Acc) ->
lists:reverse(Acc);
parse_qs(String, Acc) ->
{Key, Rest} = parse_qs_key(String),
{Value, Rest1} = parse_qs_value(Rest),
parse_qs(Rest1, [{Key, Value} | Acc]).
parse_qs_key(String) ->
parse_qs_key(String, []).
parse_qs_key([], Acc) ->
{qs_revdecode(Acc), ""};
parse_qs_key([$= | Rest], Acc) ->
{qs_revdecode(Acc), Rest};
parse_qs_key(Rest=[$; | _], Acc) ->
{qs_revdecode(Acc), Rest};
parse_qs_key(Rest=[$& | _], Acc) ->
{qs_revdecode(Acc), Rest};
parse_qs_key([C | Rest], Acc) ->
parse_qs_key(Rest, [C | Acc]).
parse_qs_value(String) ->
parse_qs_value(String, []).
parse_qs_value([], Acc) ->
{qs_revdecode(Acc), ""};
parse_qs_value([$; | Rest], Acc) ->
{qs_revdecode(Acc), Rest};
parse_qs_value([$& | Rest], Acc) ->
{qs_revdecode(Acc), Rest};
parse_qs_value([C | Rest], Acc) ->
parse_qs_value(Rest, [C | Acc]).
%% @spec unquote(string() | binary()) -> string()
%% @doc Unquote a URL encoded string.
unquote(Binary) when is_binary(Binary) ->
unquote(binary_to_list(Binary));
unquote(String) ->
qs_revdecode(lists:reverse(String)).
qs_revdecode(S) ->
qs_revdecode(S, []).
qs_revdecode([], Acc) ->
Acc;
qs_revdecode([$+ | Rest], Acc) ->
qs_revdecode(Rest, [$\s | Acc]);
qs_revdecode([Lo, Hi, ?PERCENT | Rest], Acc) when ?IS_HEX(Lo), ?IS_HEX(Hi) ->
qs_revdecode(Rest, [(unhexdigit(Lo) bor (unhexdigit(Hi) bsl 4)) | Acc]);
qs_revdecode([C | Rest], Acc) ->
qs_revdecode(Rest, [C | Acc]).
%% @spec urlsplit(Url) -> {Scheme, Netloc, Path, Query, Fragment}
%% @doc Return a 5-tuple, does not expand % escapes. Only supports HTTP style
%% URLs.
urlsplit(Url) ->
{Scheme, Url1} = urlsplit_scheme(Url),
{Netloc, Url2} = urlsplit_netloc(Url1),
{Path, Query, Fragment} = urlsplit_path(Url2),
{Scheme, Netloc, Path, Query, Fragment}.
urlsplit_scheme(Url) ->
case urlsplit_scheme(Url, []) of
no_scheme ->
{"", Url};
Res ->
Res
end.
urlsplit_scheme([C | Rest], Acc) when ((C >= $a andalso C =< $z) orelse
(C >= $A andalso C =< $Z) orelse
(C >= $0 andalso C =< $9) orelse
C =:= $+ orelse C =:= $- orelse
C =:= $.) ->
urlsplit_scheme(Rest, [C | Acc]);
urlsplit_scheme([$: | Rest], Acc=[_ | _]) ->
{string:to_lower(lists:reverse(Acc)), Rest};
urlsplit_scheme(_Rest, _Acc) ->
no_scheme.
urlsplit_netloc("//" ++ Rest) ->
urlsplit_netloc(Rest, []);
urlsplit_netloc(Path) ->
{"", Path}.
urlsplit_netloc("", Acc) ->
{lists:reverse(Acc), ""};
urlsplit_netloc(Rest=[C | _], Acc) when C =:= $/; C =:= $?; C =:= $# ->
{lists:reverse(Acc), Rest};
urlsplit_netloc([C | Rest], Acc) ->
urlsplit_netloc(Rest, [C | Acc]).
%% @spec path_split(string()) -> {Part, Rest}
%% @doc Split a path starting from the left, as in URL traversal.
%% path_split("foo/bar") = {"foo", "bar"},
%% path_split("/foo/bar") = {"", "foo/bar"}.
path_split(S) ->
path_split(S, []).
path_split("", Acc) ->
{lists:reverse(Acc), ""};
path_split("/" ++ Rest, Acc) ->
{lists:reverse(Acc), Rest};
path_split([C | Rest], Acc) ->
path_split(Rest, [C | Acc]).
%% @spec urlunsplit({Scheme, Netloc, Path, Query, Fragment}) -> string()
%% @doc Assemble a URL from the 5-tuple. Path must be absolute.
urlunsplit({Scheme, Netloc, Path, Query, Fragment}) ->
lists:flatten([case Scheme of "" -> ""; _ -> [Scheme, "://"] end,
Netloc,
urlunsplit_path({Path, Query, Fragment})]).
%% @spec urlunsplit_path({Path, Query, Fragment}) -> string()
%% @doc Assemble a URL path from the 3-tuple.
urlunsplit_path({Path, Query, Fragment}) ->
lists:flatten([Path,
case Query of "" -> ""; _ -> [$? | Query] end,
case Fragment of "" -> ""; _ -> [$# | Fragment] end]).
%% @spec urlsplit_path(Url) -> {Path, Query, Fragment}
%% @doc Return a 3-tuple, does not expand % escapes. Only supports HTTP style
%% paths.
urlsplit_path(Path) ->
urlsplit_path(Path, []).
urlsplit_path("", Acc) ->
{lists:reverse(Acc), "", ""};
urlsplit_path("?" ++ Rest, Acc) ->
{Query, Fragment} = urlsplit_query(Rest),
{lists:reverse(Acc), Query, Fragment};
urlsplit_path("#" ++ Rest, Acc) ->
{lists:reverse(Acc), "", Rest};
urlsplit_path([C | Rest], Acc) ->
urlsplit_path(Rest, [C | Acc]).
urlsplit_query(Query) ->
urlsplit_query(Query, []).
urlsplit_query("", Acc) ->
{lists:reverse(Acc), ""};
urlsplit_query("#" ++ Rest, Acc) ->
{lists:reverse(Acc), Rest};
urlsplit_query([C | Rest], Acc) ->
urlsplit_query(Rest, [C | Acc]).
%% @spec guess_mime(string()) -> string()
%% @doc Guess the mime type of a file by the extension of its filename.
guess_mime(File) ->
case mochiweb_mime:from_extension(filename:extension(File)) of
undefined ->
"text/plain";
Mime ->
Mime
end.
%% @spec parse_header(string()) -> {Type, [{K, V}]}
%% @doc Parse a Content-Type like header, return the main Content-Type
%% and a property list of options.
parse_header(String) ->
%% TODO: This is exactly as broken as Python's cgi module.
%% Should parse properly like mochiweb_cookies.
[Type | Parts] = [string:strip(S) || S <- string:tokens(String, ";")],
F = fun (S, Acc) ->
case lists:splitwith(fun (C) -> C =/= $= end, S) of
{"", _} ->
%% Skip anything with no name
Acc;
{_, ""} ->
%% Skip anything with no value
Acc;
{Name, [$\= | Value]} ->
[{string:to_lower(string:strip(Name)),
unquote_header(string:strip(Value))} | Acc]
end
end,
{string:to_lower(Type),
lists:foldr(F, [], Parts)}.
unquote_header("\"" ++ Rest) ->
unquote_header(Rest, []);
unquote_header(S) ->
S.
unquote_header("", Acc) ->
lists:reverse(Acc);
unquote_header("\"", Acc) ->
lists:reverse(Acc);
unquote_header([$\\, C | Rest], Acc) ->
unquote_header(Rest, [C | Acc]);
unquote_header([C | Rest], Acc) ->
unquote_header(Rest, [C | Acc]).
%% @spec record_to_proplist(Record, Fields) -> proplist()
%% @doc calls record_to_proplist/3 with a default TypeKey of '__record'
record_to_proplist(Record, Fields) ->
record_to_proplist(Record, Fields, '__record').
%% @spec record_to_proplist(Record, Fields, TypeKey) -> proplist()
%% @doc Return a proplist of the given Record with each field in the
%% Fields list set as a key with the corresponding value in the Record.
%% TypeKey is the key that is used to store the record type
%% Fields should be obtained by calling record_info(fields, record_type)
%% where record_type is the record type of Record
record_to_proplist(Record, Fields, TypeKey)
when tuple_size(Record) - 1 =:= length(Fields) ->
lists:zip([TypeKey | Fields], tuple_to_list(Record)).
shell_quote([], Acc) ->
lists:reverse([$\" | Acc]);
shell_quote([C | Rest], Acc) when C =:= $\" orelse C =:= $\` orelse
C =:= $\\ orelse C =:= $\$ ->
shell_quote(Rest, [C, $\\ | Acc]);
shell_quote([C | Rest], Acc) ->
shell_quote(Rest, [C | Acc]).
%% @spec parse_qvalues(string()) -> [qvalue()] | invalid_qvalue_string
%% @type qvalue() = {media_type() | encoding() , float()}.
%% @type media_type() = string().
%% @type encoding() = string().
%%
%% @doc Parses a list (given as a string) of elements with Q values associated
%% to them. Elements are separated by commas and each element is separated
%% from its Q value by a semicolon. Q values are optional but when missing
%% the value of an element is considered as 1.0. A Q value is always in the
%% range [0.0, 1.0]. A Q value list is used for example as the value of the
%% HTTP "Accept" and "Accept-Encoding" headers.
%%
%% Q values are described in section 2.9 of the RFC 2616 (HTTP 1.1).
%%
%% Example:
%%
%% parse_qvalues("gzip; q=0.5, deflate, identity;q=0.0") ->
%% [{"gzip", 0.5}, {"deflate", 1.0}, {"identity", 0.0}]
%%
parse_qvalues(QValuesStr) ->
try
lists:map(
fun(Pair) ->
[Type | Params] = string:tokens(Pair, ";"),
NormParams = normalize_media_params(Params),
{Q, NonQParams} = extract_q(NormParams),
{string:join([string:strip(Type) | NonQParams], ";"), Q}
end,
string:tokens(string:to_lower(QValuesStr), ",")
)
catch
_Type:_Error ->
invalid_qvalue_string
end.
normalize_media_params(Params) ->
{ok, Re} = re:compile("\\s"),
normalize_media_params(Re, Params, []).
normalize_media_params(_Re, [], Acc) ->
lists:reverse(Acc);
normalize_media_params(Re, [Param | Rest], Acc) ->
NormParam = re:replace(Param, Re, "", [global, {return, list}]),
normalize_media_params(Re, Rest, [NormParam | Acc]).
extract_q(NormParams) ->
{ok, KVRe} = re:compile("^([^=]+)=([^=]+)$"),
{ok, QRe} = re:compile("^((?:0|1)(?:\\.\\d{1,3})?)$"),
extract_q(KVRe, QRe, NormParams, []).
extract_q(_KVRe, _QRe, [], Acc) ->
{1.0, lists:reverse(Acc)};
extract_q(KVRe, QRe, [Param | Rest], Acc) ->
case re:run(Param, KVRe, [{capture, [1, 2], list}]) of
{match, [Name, Value]} ->
case Name of
"q" ->
{match, [Q]} = re:run(Value, QRe, [{capture, [1], list}]),
QVal = case Q of
"0" ->
0.0;
"1" ->
1.0;
Else ->
list_to_float(Else)
end,
case QVal < 0.0 orelse QVal > 1.0 of
false ->
{QVal, lists:reverse(Acc) ++ Rest}
end;
_ ->
extract_q(KVRe, QRe, Rest, [Param | Acc])
end
end.
%% @spec pick_accepted_encodings([qvalue()], [encoding()], encoding()) ->
%% [encoding()]
%%
%% @doc Determines which encodings specified in the given Q values list are
%% valid according to a list of supported encodings and a default encoding.
%%
%% The returned list of encodings is sorted, descendingly, according to the
%% Q values of the given list. The last element of this list is the given
%% default encoding unless this encoding is explicitily or implicitily
%% marked with a Q value of 0.0 in the given Q values list.
%% Note: encodings with the same Q value are kept in the same order as
%% found in the input Q values list.
%%
%% This encoding picking process is described in section 14.3 of the
%% RFC 2616 (HTTP 1.1).
%%
%% Example:
%%
%% pick_accepted_encodings(
%% [{"gzip", 0.5}, {"deflate", 1.0}],
%% ["gzip", "identity"],
%% "identity"
%% ) ->
%% ["gzip", "identity"]
%%
pick_accepted_encodings(AcceptedEncs, SupportedEncs, DefaultEnc) ->
SortedQList = lists:reverse(
lists:sort(fun({_, Q1}, {_, Q2}) -> Q1 < Q2 end, AcceptedEncs)
),
{Accepted, Refused} = lists:foldr(
fun({E, Q}, {A, R}) ->
case Q > 0.0 of
true ->
{[E | A], R};
false ->
{A, [E | R]}
end
end,
{[], []},
SortedQList
),
Refused1 = lists:foldr(
fun(Enc, Acc) ->
case Enc of
"*" ->
lists:subtract(SupportedEncs, Accepted) ++ Acc;
_ ->
[Enc | Acc]
end
end,
[],
Refused
),
Accepted1 = lists:foldr(
fun(Enc, Acc) ->
case Enc of
"*" ->
lists:subtract(SupportedEncs, Accepted ++ Refused1) ++ Acc;
_ ->
[Enc | Acc]
end
end,
[],
Accepted
),
Accepted2 = case lists:member(DefaultEnc, Accepted1) of
true ->
Accepted1;
false ->
Accepted1 ++ [DefaultEnc]
end,
[E || E <- Accepted2, lists:member(E, SupportedEncs),
not lists:member(E, Refused1)].
make_io(Atom) when is_atom(Atom) ->
atom_to_list(Atom);
make_io(Integer) when is_integer(Integer) ->
integer_to_list(Integer);
make_io(Io) when is_list(Io); is_binary(Io) ->
Io.
%%
%% Tests
%%
-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").
make_io_test() ->
?assertEqual(
<<"atom">>,
iolist_to_binary(make_io(atom))),
?assertEqual(
<<"20">>,
iolist_to_binary(make_io(20))),
?assertEqual(
<<"list">>,
iolist_to_binary(make_io("list"))),
?assertEqual(
<<"binary">>,
iolist_to_binary(make_io(<<"binary">>))),
ok.
-record(test_record, {field1=f1, field2=f2}).
record_to_proplist_test() ->
?assertEqual(
[{'__record', test_record},
{field1, f1},
{field2, f2}],
record_to_proplist(#test_record{}, record_info(fields, test_record))),
?assertEqual(
[{'typekey', test_record},
{field1, f1},
{field2, f2}],
record_to_proplist(#test_record{},
record_info(fields, test_record),
typekey)),
ok.
shell_quote_test() ->
?assertEqual(
"\"foo \\$bar\\\"\\`' baz\"",
shell_quote("foo $bar\"`' baz")),
ok.
cmd_port_test_spool(Port, Acc) ->
receive
{Port, eof} ->
Acc;
{Port, {data, {eol, Data}}} ->
cmd_port_test_spool(Port, ["\n", Data | Acc]);
{Port, Unknown} ->
throw({unknown, Unknown})
after 1000 ->
throw(timeout)
end.
cmd_port_test() ->
Port = cmd_port(["echo", "$bling$ `word`!"],
[eof, stream, {line, 4096}]),
Res = try lists:append(lists:reverse(cmd_port_test_spool(Port, [])))
after catch port_close(Port)
end,
self() ! {Port, wtf},
try cmd_port_test_spool(Port, [])
catch throw:{unknown, wtf} -> ok
end,
try cmd_port_test_spool(Port, [])
catch throw:timeout -> ok
end,
?assertEqual(
"$bling$ `word`!\n",
Res).
cmd_test() ->
?assertEqual(
"$bling$ `word`!\n",
cmd(["echo", "$bling$ `word`!"])),
ok.
cmd_string_test() ->
?assertEqual(
"\"echo\" \"\\$bling\\$ \\`word\\`!\"",
cmd_string(["echo", "$bling$ `word`!"])),
ok.
cmd_status_test() ->
?assertEqual(
{0, <<"$bling$ `word`!\n">>},
cmd_status(["echo", "$bling$ `word`!"])),
ok.
parse_header_test() ->
?assertEqual(
{"multipart/form-data", [{"boundary", "AaB03x"}]},
parse_header("multipart/form-data; boundary=AaB03x")),
%% This tests (currently) intentionally broken behavior
?assertEqual(
{"multipart/form-data",
[{"b", ""},
{"cgi", "is"},
{"broken", "true\"e"}]},
parse_header("multipart/form-data;b=;cgi=\"i\\s;broken=true\"e;=z;z")),
ok.
guess_mime_test() ->
"text/plain" = guess_mime(""),
"text/plain" = guess_mime(".text"),
"application/zip" = guess_mime(".zip"),
"application/zip" = guess_mime("x.zip"),
"text/html" = guess_mime("x.html"),
"application/xhtml+xml" = guess_mime("x.xhtml"),
ok.
path_split_test() ->
{"", "foo/bar"} = path_split("/foo/bar"),
{"foo", "bar"} = path_split("foo/bar"),
{"bar", ""} = path_split("bar"),
ok.
urlsplit_test() ->
{"", "", "/foo", "", "bar?baz"} = urlsplit("/foo#bar?baz"),
{"http", "host:port", "/foo", "", "bar?baz"} =
urlsplit("http://host:port/foo#bar?baz"),
{"http", "host", "", "", ""} = urlsplit("http://host"),
{"", "", "/wiki/Category:Fruit", "", ""} =
urlsplit("/wiki/Category:Fruit"),
ok.
urlsplit_path_test() ->
{"/foo/bar", "", ""} = urlsplit_path("/foo/bar"),
{"/foo", "baz", ""} = urlsplit_path("/foo?baz"),
{"/foo", "", "bar?baz"} = urlsplit_path("/foo#bar?baz"),
{"/foo", "", "bar?baz#wibble"} = urlsplit_path("/foo#bar?baz#wibble"),
{"/foo", "bar", "baz"} = urlsplit_path("/foo?bar#baz"),
{"/foo", "bar?baz", "baz"} = urlsplit_path("/foo?bar?baz#baz"),
ok.
urlunsplit_test() ->
"/foo#bar?baz" = urlunsplit({"", "", "/foo", "", "bar?baz"}),
"http://host:port/foo#bar?baz" =
urlunsplit({"http", "host:port", "/foo", "", "bar?baz"}),
ok.
urlunsplit_path_test() ->
"/foo/bar" = urlunsplit_path({"/foo/bar", "", ""}),
"/foo?baz" = urlunsplit_path({"/foo", "baz", ""}),
"/foo#bar?baz" = urlunsplit_path({"/foo", "", "bar?baz"}),
"/foo#bar?baz#wibble" = urlunsplit_path({"/foo", "", "bar?baz#wibble"}),
"/foo?bar#baz" = urlunsplit_path({"/foo", "bar", "baz"}),
"/foo?bar?baz#baz" = urlunsplit_path({"/foo", "bar?baz", "baz"}),
ok.
join_test() ->
?assertEqual("foo,bar,baz",
join(["foo", "bar", "baz"], $,)),
?assertEqual("foo,bar,baz",
join(["foo", "bar", "baz"], ",")),
?assertEqual("foo bar",
join([["foo", " bar"]], ",")),
?assertEqual("foo bar,baz",
join([["foo", " bar"], "baz"], ",")),
?assertEqual("foo",
join(["foo"], ",")),
?assertEqual("foobarbaz",
join(["foo", "bar", "baz"], "")),
?assertEqual("foo" ++ [<<>>] ++ "bar" ++ [<<>>] ++ "baz",
join(["foo", "bar", "baz"], <<>>)),
?assertEqual("foobar" ++ [<<"baz">>],
join(["foo", "bar", <<"baz">>], "")),
?assertEqual("",
join([], "any")),
ok.
quote_plus_test() ->
"foo" = quote_plus(foo),
"1" = quote_plus(1),
"1.1" = quote_plus(1.1),
"foo" = quote_plus("foo"),
"foo+bar" = quote_plus("foo bar"),
"foo%0A" = quote_plus("foo\n"),
"foo%0A" = quote_plus("foo\n"),
"foo%3B%26%3D" = quote_plus("foo;&="),
"foo%3B%26%3D" = quote_plus(<<"foo;&=">>),
ok.
unquote_test() ->
?assertEqual("foo bar",
unquote("foo+bar")),
?assertEqual("foo bar",
unquote("foo%20bar")),
?assertEqual("foo\r\n",
unquote("foo%0D%0A")),
?assertEqual("foo\r\n",
unquote(<<"foo%0D%0A">>)),
ok.
urlencode_test() ->
"foo=bar&baz=wibble+%0D%0A&z=1" = urlencode([{foo, "bar"},
{"baz", "wibble \r\n"},
{z, 1}]),
ok.
parse_qs_test() ->
?assertEqual(
[{"foo", "bar"}, {"baz", "wibble \r\n"}, {"z", "1"}],
parse_qs("foo=bar&baz=wibble+%0D%0a&z=1")),
?assertEqual(
[{"", "bar"}, {"baz", "wibble \r\n"}, {"z", ""}],
parse_qs("=bar&baz=wibble+%0D%0a&z=")),
?assertEqual(
[{"foo", "bar"}, {"baz", "wibble \r\n"}, {"z", "1"}],
parse_qs(<<"foo=bar&baz=wibble+%0D%0a&z=1">>)),
?assertEqual(
[],
parse_qs("")),
?assertEqual(
[{"foo", ""}, {"bar", ""}, {"baz", ""}],
parse_qs("foo;bar&baz")),
ok.
partition_test() ->
{"foo", "", ""} = partition("foo", "/"),
{"foo", "/", "bar"} = partition("foo/bar", "/"),
{"foo", "/", ""} = partition("foo/", "/"),
{"", "/", "bar"} = partition("/bar", "/"),
{"f", "oo/ba", "r"} = partition("foo/bar", "oo/ba"),
ok.
safe_relative_path_test() ->
"foo" = safe_relative_path("foo"),
"foo/" = safe_relative_path("foo/"),
"foo" = safe_relative_path("foo/bar/.."),
"bar" = safe_relative_path("foo/../bar"),
"bar/" = safe_relative_path("foo/../bar/"),
"" = safe_relative_path("foo/.."),
"" = safe_relative_path("foo/../"),
undefined = safe_relative_path("/foo"),
undefined = safe_relative_path("../foo"),
undefined = safe_relative_path("foo/../.."),
undefined = safe_relative_path("foo//"),
ok.
parse_qvalues_test() ->
[] = parse_qvalues(""),
[{"identity", 0.0}] = parse_qvalues("identity;q=0"),
[{"identity", 0.0}] = parse_qvalues("identity ;q=0"),
[{"identity", 0.0}] = parse_qvalues(" identity; q =0 "),
[{"identity", 0.0}] = parse_qvalues("identity ; q = 0"),
[{"identity", 0.0}] = parse_qvalues("identity ; q= 0.0"),
[{"gzip", 1.0}, {"deflate", 1.0}, {"identity", 0.0}] = parse_qvalues(
"gzip,deflate,identity;q=0.0"
),
[{"deflate", 1.0}, {"gzip", 1.0}, {"identity", 0.0}] = parse_qvalues(
"deflate,gzip,identity;q=0.0"
),
[{"gzip", 1.0}, {"deflate", 1.0}, {"gzip", 1.0}, {"identity", 0.0}] =
parse_qvalues("gzip,deflate,gzip,identity;q=0"),
[{"gzip", 1.0}, {"deflate", 1.0}, {"identity", 0.0}] = parse_qvalues(
"gzip, deflate , identity; q=0.0"
),
[{"gzip", 1.0}, {"deflate", 1.0}, {"identity", 0.0}] = parse_qvalues(
"gzip; q=1, deflate;q=1.0, identity;q=0.0"
),
[{"gzip", 0.5}, {"deflate", 1.0}, {"identity", 0.0}] = parse_qvalues(
"gzip; q=0.5, deflate;q=1.0, identity;q=0"
),
[{"gzip", 0.5}, {"deflate", 1.0}, {"identity", 0.0}] = parse_qvalues(
"gzip; q=0.5, deflate , identity;q=0.0"
),
[{"gzip", 0.5}, {"deflate", 0.8}, {"identity", 0.0}] = parse_qvalues(
"gzip; q=0.5, deflate;q=0.8, identity;q=0.0"
),
[{"gzip", 0.5}, {"deflate", 1.0}, {"identity", 1.0}] = parse_qvalues(
"gzip; q=0.5,deflate,identity"
),
[{"gzip", 0.5}, {"deflate", 1.0}, {"identity", 1.0}, {"identity", 1.0}] =
parse_qvalues("gzip; q=0.5,deflate,identity, identity "),
[{"text/html;level=1", 1.0}, {"text/plain", 0.5}] =
parse_qvalues("text/html;level=1, text/plain;q=0.5"),
[{"text/html;level=1", 0.3}, {"text/plain", 1.0}] =
parse_qvalues("text/html;level=1;q=0.3, text/plain"),
[{"text/html;level=1", 0.3}, {"text/plain", 1.0}] =
parse_qvalues("text/html; level = 1; q = 0.3, text/plain"),
[{"text/html;level=1", 0.3}, {"text/plain", 1.0}] =
parse_qvalues("text/html;q=0.3;level=1, text/plain"),
invalid_qvalue_string = parse_qvalues("gzip; q=1.1, deflate"),
invalid_qvalue_string = parse_qvalues("gzip; q=0.5, deflate;q=2"),
invalid_qvalue_string = parse_qvalues("gzip, deflate;q=AB"),
invalid_qvalue_string = parse_qvalues("gzip; q=2.1, deflate"),
invalid_qvalue_string = parse_qvalues("gzip; q=0.1234, deflate"),
invalid_qvalue_string = parse_qvalues("text/html;level=1;q=0.3, text/html;level"),
ok.
pick_accepted_encodings_test() ->
["identity"] = pick_accepted_encodings(
[],
["gzip", "identity"],
"identity"
),
["gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 1.0}],
["gzip", "identity"],
"identity"
),
["identity"] = pick_accepted_encodings(
[{"gzip", 0.0}],
["gzip", "identity"],
"identity"
),
["gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 1.0}, {"deflate", 1.0}],
["gzip", "identity"],
"identity"
),
["gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 0.5}, {"deflate", 1.0}],
["gzip", "identity"],
"identity"
),
["identity"] = pick_accepted_encodings(
[{"gzip", 0.0}, {"deflate", 0.0}],
["gzip", "identity"],
"identity"
),
["gzip"] = pick_accepted_encodings(
[{"gzip", 1.0}, {"deflate", 1.0}, {"identity", 0.0}],
["gzip", "identity"],
"identity"
),
["gzip", "deflate", "identity"] = pick_accepted_encodings(
[{"gzip", 1.0}, {"deflate", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "deflate"] = pick_accepted_encodings(
[{"gzip", 1.0}, {"deflate", 1.0}, {"identity", 0.0}],
["gzip", "deflate", "identity"],
"identity"
),
["deflate", "gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 0.2}, {"deflate", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
["deflate", "deflate", "gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 0.2}, {"deflate", 1.0}, {"deflate", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
["deflate", "gzip", "gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 0.2}, {"deflate", 1.0}, {"gzip", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "deflate", "gzip", "identity"] = pick_accepted_encodings(
[{"gzip", 0.2}, {"deflate", 0.9}, {"gzip", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
[] = pick_accepted_encodings(
[{"*", 0.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "deflate", "identity"] = pick_accepted_encodings(
[{"*", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "deflate", "identity"] = pick_accepted_encodings(
[{"*", 0.6}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip"] = pick_accepted_encodings(
[{"gzip", 1.0}, {"*", 0.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "deflate"] = pick_accepted_encodings(
[{"gzip", 1.0}, {"deflate", 0.6}, {"*", 0.0}],
["gzip", "deflate", "identity"],
"identity"
),
["deflate", "gzip"] = pick_accepted_encodings(
[{"gzip", 0.5}, {"deflate", 1.0}, {"*", 0.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "identity"] = pick_accepted_encodings(
[{"deflate", 0.0}, {"*", 1.0}],
["gzip", "deflate", "identity"],
"identity"
),
["gzip", "identity"] = pick_accepted_encodings(
[{"*", 1.0}, {"deflate", 0.0}],
["gzip", "deflate", "identity"],
"identity"
),
ok.
-endif.