1 files changed, 98 insertions, 0 deletions
diff --git a/deps/oauth/src/oauth_uri.erl b/deps/oauth/src/oauth_uri.erl
new file mode 100644
index 00000000..5023f983
--- /dev/null
+++ b/deps/oauth/src/oauth_uri.erl
@@ -0,0 +1,98 @@
+-module(oauth_uri).
+
+-export([normalize/1, calate/2, encode/1]).
+-export([params_from_string/1, params_to_string/1,
+  params_from_header_string/1, params_to_header_string/1]).
+
+-import(lists, [concat/1]).
+
+
+normalize(URI) ->
+  case http_uri:parse(URI) of
+    {Scheme, UserInfo, Host, Port, Path, _Query} ->
+      normalize(Scheme, UserInfo, string:to_lower(Host), Port, [Path]);
+    Else ->
+      Else
+  end.
+
+normalize(http, UserInfo, Host, 80, Acc) ->
+  normalize(http, UserInfo, [Host|Acc]);
+normalize(https, UserInfo, Host, 443, Acc) ->
+  normalize(https, UserInfo, [Host|Acc]);
+normalize(Scheme, UserInfo, Host, Port, Acc) ->
+  normalize(Scheme, UserInfo, [Host, ":", Port|Acc]).
+
+normalize(Scheme, [], Acc) ->
+  concat([Scheme, "://"|Acc]);
+normalize(Scheme, UserInfo, Acc) ->
+  concat([Scheme, "://", UserInfo, "@"|Acc]).
+
+params_to_header_string(Params) ->
+  intercalate(", ", [concat([encode(K), "=\"", encode(V), "\""]) || {K, V} <- Params]).
+
+params_from_header_string(String) ->
+  [param_from_header_string(Param) || Param <- re:split(String, ",\\s*", [{return, list}]), Param =/= ""].
+
+param_from_header_string(Param) ->
+  [Key, QuotedValue] = string:tokens(Param, "="),
+  Value = string:substr(QuotedValue, 2, length(QuotedValue) - 2),
+  {decode(Key), decode(Value)}.
+
+params_from_string(Params) ->
+  [param_from_string(Param) || Param <- string:tokens(Params, "&")].
+
+param_from_string(Param) ->
+  list_to_tuple([decode(Value) || Value <- string:tokens(Param, "=")]).
+
+params_to_string(Params) ->
+  intercalate("&", [calate("=", [K, V]) || {K, V} <- Params]).
+
+calate(Sep, Xs) ->
+  intercalate(Sep, [encode(X) || X <- Xs]).
+
+intercalate(Sep, Xs) ->
+  concat(intersperse(Sep, Xs)).
+
+intersperse(_, []) -> [];
+intersperse(_, [X]) -> [X];
+intersperse(Sep, [X|Xs]) ->
+  [X, Sep|intersperse(Sep, Xs)].
+
+-define(is_alphanum(C), C >= $A, C =< $Z; C >= $a, C =< $z; C >= $0, C =< $9).
+
+encode(Term) when is_integer(Term) ->
+  integer_to_list(Term);
+encode(Term) when is_atom(Term) ->
+  encode(atom_to_list(Term));
+encode(Term) when is_list(Term) ->
+  encode(lists:reverse(Term, []), []).
+
+encode([X | T], Acc) when ?is_alphanum(X); X =:= $-; X =:= $_; X =:= $.; X =:= $~ ->
+  encode(T, [X | Acc]);
+encode([X | T], Acc) ->
+  NewAcc = [$%, dec2hex(X bsr 4), dec2hex(X band 16#0f) | Acc],
+  encode(T, NewAcc);
+encode([], Acc) ->
+  Acc.
+
+decode(Str) when is_list(Str) ->
+  decode(Str, []).
+
+decode([$%, A, B | T], Acc) ->
+  decode(T, [(hex2dec(A) bsl 4) + hex2dec(B) | Acc]);
+decode([X | T], Acc) ->
+  decode(T, [X | Acc]);
+decode([], Acc) ->
+  lists:reverse(Acc, []).
+
+-compile({inline, [{dec2hex, 1}, {hex2dec, 1}]}).
+
+dec2hex(N) when N >= 10 andalso N =< 15 ->
+  N + $A - 10;
+dec2hex(N) when N >= 0 andalso N =< 9 ->
+  N + $0.
+
+hex2dec(C) when C >= $A andalso C =< $F ->
+  C - $A + 10;
+hex2dec(C) when C >= $0 andalso C =< $9 ->
+  C - $0.