Initial check-in of OAuth and cookie authentication.

git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@800938 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 88 insertions, 0 deletions

diff --git a/src/erlang-oauth/oauth_uri.erl b/src/erlang-oauth/oauth_uri.erl
new file mode 100644
index 00000000..fb27ae72
--- /dev/null
+++ b/src/erlang-oauth/oauth_uri.erl
@@ -0,0 +1,88 @@
+-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]).
+
+-define(is_uppercase_alpha(C), C >= $A, C =< $Z).
+-define(is_lowercase_alpha(C), C >= $a, C =< $z).
+-define(is_alpha(C), ?is_uppercase_alpha(C); ?is_lowercase_alpha(C)).
+-define(is_digit(C), C >= $0, C =< $9).
+-define(is_alphanumeric(C), ?is_alpha(C); ?is_digit(C)).
+-define(is_unreserved(C), ?is_alphanumeric(C); C =:= $-; C =:= $_; C =:= $.; C =:= $~).
+-define(is_hex(C), ?is_digit(C); C >= $A, C =< $F).
+
+
+normalize(URI) ->
+  case http_uri:parse(URI) of
+    {Scheme, UserInfo, Host, Port, Path, _Query} ->
+      normalize(Scheme, UserInfo, string:to_lower(Host), Port, [Path]);
+    Else ->
+      Else
+  end.
+
+normalize(http, UserInfo, Host, 80, Acc) ->
+  normalize(http, UserInfo, [Host|Acc]);
+normalize(https, UserInfo, Host, 443, Acc) ->
+  normalize(https, UserInfo, [Host|Acc]);
+normalize(Scheme, UserInfo, Host, Port, Acc) ->
+  normalize(Scheme, UserInfo, [Host, ":", Port|Acc]).
+
+normalize(Scheme, [], Acc) ->
+  concat([Scheme, "://"|Acc]);
+normalize(Scheme, UserInfo, Acc) ->
+  concat([Scheme, "://", UserInfo, "@"|Acc]).
+
+params_to_header_string(Params) ->
+  intercalate(", ", [concat([encode(K), "=\"", encode(V), "\""]) || {K, V} <- Params]).
+
+params_from_header_string(String) ->
+  [param_from_header_string(Param) || Param <- re:split(String, ",\\s*", [{return, list}]), Param =/= ""].
+
+param_from_header_string(Param) ->
+  [Key, QuotedValue] = string:tokens(Param, "="),
+  Value = string:substr(QuotedValue, 2, length(QuotedValue) - 2),
+  {decode(Key), decode(Value)}.
+
+params_from_string(Params) ->
+  [param_from_string(Param) || Param <- string:tokens(Params, "&")].
+
+param_from_string(Param) ->
+  list_to_tuple([decode(Value) || Value <- string:tokens(Param, "=")]).
+
+params_to_string(Params) ->
+  intercalate("&", [calate("=", [K, V]) || {K, V} <- Params]).
+
+calate(Sep, Xs) ->
+  intercalate(Sep, [encode(X) || X <- Xs]).
+
+intercalate(Sep, Xs) ->
+  concat(intersperse(Sep, Xs)).
+
+intersperse(_, []) -> [];
+intersperse(_, [X]) -> [X];
+intersperse(Sep, [X|Xs]) ->
+  [X, Sep|intersperse(Sep, Xs)].
+
+decode(Chars) ->
+  decode(Chars, []).
+
+decode([], Decoded) ->
+  lists:reverse(Decoded);
+decode([$%,A,B|Etc], Decoded) when ?is_hex(A), ?is_hex(B) ->
+  decode(Etc, [erlang:list_to_integer([A,B], 16)|Decoded]);
+decode([C|Etc], Decoded) when ?is_unreserved(C) ->
+  decode(Etc, [C|Decoded]).
+
+encode(Chars) ->
+  encode(Chars, []).
+
+encode([], Encoded) ->
+  lists:flatten(lists:reverse(Encoded));
+encode([C|Etc], Encoded) when ?is_unreserved(C) ->
+  encode(Etc, [C|Encoded]);
+encode([C|Etc], Encoded) ->
+  Value = io_lib:format("%~2.1.0s", [erlang:integer_to_list(C, 16)]),
+  encode(Etc, [Value|Encoded]).