update erlang-oauth to 1.3.0
diff --git a/Makefile.am b/Makefile.am
index 48b7648..a334677 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -14,25 +14,14 @@
oauth_file_collection = \
oauth.app.in \
- oauth.erl \
- oauth_hmac_sha1.erl \
- oauth_http.erl \
- oauth_plaintext.erl \
- oauth_rsa_sha1.erl \
- oauth_unix.erl \
- oauth_uri.erl
+ oauth.erl
# Removed oauth_rsa_sha1.beam until we require R12B5 or
# we add a ./configure option to enable it.
oauthebin_make_generated_file_list = \
oauth.app \
- oauth.beam \
- oauth_hmac_sha1.beam \
- oauth_http.beam \
- oauth_plaintext.beam \
- oauth_unix.beam \
- oauth_uri.beam
+ oauth.beam
oauthebin_DATA = \
$(oauthebin_make_generated_file_list)
diff --git a/oauth.erl b/oauth.erl
index 866655c..e75d5fd 100644
--- a/oauth.erl
+++ b/oauth.erl
@@ -1,34 +1,54 @@
-module(oauth).
--export(
- [ get/5
- , header/1
- , post/5
- , signature/5
- , signature_base_string/3
- , signed_params/6
- , token/1
- , token_secret/1
- , uri/2
- , verify/6
- ]).
+-export([get/3, get/5, get/6, post/3, post/5, post/6, put/6, put/7, uri/2, header/1,
+ sign/6, params_decode/1, token/1, token_secret/1, verify/6]).
+-export([plaintext_signature/2, hmac_sha1_signature/5,
+ hmac_sha1_signature/3, rsa_sha1_signature/4, rsa_sha1_signature/2,
+ signature_base_string/3, params_encode/1]).
+
+-export([plaintext_verify/3, hmac_sha1_verify/6, hmac_sha1_verify/4,
+ rsa_sha1_verify/5, rsa_sha1_verify/3]).
+
+-export([header_params_encode/1, header_params_decode/1,
+ uri_params_encode/1, uri_params_decode/1]).
+
+-include_lib("public_key/include/public_key.hrl").
+
+get(URL, ExtraParams, Consumer) ->
+ get(URL, ExtraParams, Consumer, "", "").
get(URL, ExtraParams, Consumer, Token, TokenSecret) ->
- SignedParams = signed_params("GET", URL, ExtraParams, Consumer, Token, TokenSecret),
- oauth_http:get(uri(URL, SignedParams)).
+ get(URL, ExtraParams, Consumer, Token, TokenSecret, []).
+
+get(URL, ExtraParams, Consumer, Token, TokenSecret, HttpcOptions) ->
+ SignedParams = sign("GET", URL, ExtraParams, Consumer, Token, TokenSecret),
+ http_request(get, {uri(URL, SignedParams), []}, HttpcOptions).
+
+post(URL, ExtraParams, Consumer) ->
+ post(URL, ExtraParams, Consumer, "", "").
post(URL, ExtraParams, Consumer, Token, TokenSecret) ->
- SignedParams = signed_params("POST", URL, ExtraParams, Consumer, Token, TokenSecret),
- oauth_http:post(URL, oauth_uri:params_to_string(SignedParams)).
+ post(URL, ExtraParams, Consumer, Token, TokenSecret, []).
+
+post(URL, ExtraParams, Consumer, Token, TokenSecret, HttpcOptions) ->
+ SignedParams = sign("POST", URL, ExtraParams, Consumer, Token, TokenSecret),
+ http_request(post, {URL, [], "application/x-www-form-urlencoded", uri_params_encode(SignedParams)}, HttpcOptions).
+
+put(URL, ExtraParams, {ContentType, Body}, Consumer, Token, TokenSecret) ->
+ put(URL, ExtraParams, {ContentType, Body}, Consumer, Token, TokenSecret, []).
+
+put(URL, ExtraParams, {ContentType, Body}, Consumer, Token, TokenSecret, HttpcOptions) ->
+ SignedParams = sign("PUT", URL, ExtraParams, Consumer, Token, TokenSecret),
+ http_request(put, {uri(URL, SignedParams), [], ContentType, Body}, HttpcOptions).
uri(Base, []) ->
Base;
uri(Base, Params) ->
- lists:concat([Base, "?", oauth_uri:params_to_string(Params)]).
+ lists:concat([Base, "?", uri_params_encode(Params)]).
header(Params) ->
- {"Authorization", "OAuth " ++ oauth_uri:params_to_header_string(Params)}.
+ {"Authorization", "OAuth " ++ header_params_encode(Params)}.
token(Params) ->
proplists:get_value("oauth_token", Params).
@@ -36,49 +56,28 @@
token_secret(Params) ->
proplists:get_value("oauth_token_secret", Params).
-verify(Signature, HttpMethod, URL, Params, Consumer, TokenSecret) ->
- case signature_method(Consumer) of
- plaintext ->
- oauth_plaintext:verify(Signature, consumer_secret(Consumer), TokenSecret);
- hmac_sha1 ->
- BaseString = signature_base_string(HttpMethod, URL, Params),
- oauth_hmac_sha1:verify(Signature, BaseString, consumer_secret(Consumer), TokenSecret);
- rsa_sha1 ->
- BaseString = signature_base_string(HttpMethod, URL, Params),
- oauth_rsa_sha1:verify(Signature, BaseString, consumer_secret(Consumer))
- end.
+consumer_key(_Consumer={Key, _, _}) ->
+ Key.
-signed_params(HttpMethod, URL, ExtraParams, Consumer, Token, TokenSecret) ->
- Params = token_param(Token, params(Consumer, ExtraParams)),
- [{"oauth_signature", signature(HttpMethod, URL, Params, Consumer, TokenSecret)}|Params].
+consumer_secret(_Consumer={_, Secret, _}) ->
+ Secret.
-signature(HttpMethod, URL, Params, Consumer, TokenSecret) ->
- case signature_method(Consumer) of
- plaintext ->
- oauth_plaintext:signature(consumer_secret(Consumer), TokenSecret);
- hmac_sha1 ->
- BaseString = signature_base_string(HttpMethod, URL, Params),
- oauth_hmac_sha1:signature(BaseString, consumer_secret(Consumer), TokenSecret);
- rsa_sha1 ->
- BaseString = signature_base_string(HttpMethod, URL, Params),
- oauth_rsa_sha1:signature(BaseString, consumer_secret(Consumer))
- end.
+signature_method(_Consumer={_, _, Method}) ->
+ Method.
-signature_base_string(HttpMethod, URL, Params) ->
- NormalizedURL = oauth_uri:normalize(URL),
- NormalizedParams = oauth_uri:params_to_string(lists:sort(Params)),
- oauth_uri:calate("&", [HttpMethod, NormalizedURL, NormalizedParams]).
+sign(HttpMethod, URL, Params, Consumer, Token, TokenSecret) ->
+ SignatureParams = signature_params(Consumer, Params, Token),
+ Signature = signature(HttpMethod, URL, SignatureParams, Consumer, TokenSecret),
+ [{"oauth_signature", Signature} | SignatureParams].
-token_param("", Params) ->
- Params;
-token_param(Token, Params) ->
- [{"oauth_token", Token}|Params].
+signature_params(Consumer, Params, "") ->
+ signature_params(Consumer, Params);
+signature_params(Consumer, Params, Token) ->
+ signature_params(Consumer, [{"oauth_token", Token} | Params]).
-params(Consumer, Params) ->
+signature_params(Consumer, Params) ->
+ Timestamp = unix_timestamp(),
Nonce = base64:encode_to_string(crypto:rand_bytes(32)), % cf. ruby-oauth
- params(Consumer, oauth_unix:timestamp(), Nonce, Params).
-
-params(Consumer, Timestamp, Nonce, Params) ->
[ {"oauth_version", "1.0"}
, {"oauth_nonce", Nonce}
, {"oauth_timestamp", integer_to_list(Timestamp)}
@@ -87,6 +86,26 @@
| Params
].
+verify(Signature, HttpMethod, URL, Params, Consumer, TokenSecret) ->
+ case signature_method(Consumer) of
+ plaintext ->
+ plaintext_verify(Signature, Consumer, TokenSecret);
+ hmac_sha1 ->
+ hmac_sha1_verify(Signature, HttpMethod, URL, Params, Consumer, TokenSecret);
+ rsa_sha1 ->
+ rsa_sha1_verify(Signature, HttpMethod, URL, Params, Consumer)
+ end.
+
+signature(HttpMethod, URL, Params, Consumer, TokenSecret) ->
+ case signature_method(Consumer) of
+ plaintext ->
+ plaintext_signature(Consumer, TokenSecret);
+ hmac_sha1 ->
+ hmac_sha1_signature(HttpMethod, URL, Params, Consumer, TokenSecret);
+ rsa_sha1 ->
+ rsa_sha1_signature(HttpMethod, URL, Params, Consumer)
+ end.
+
signature_method_string(Consumer) ->
case signature_method(Consumer) of
plaintext ->
@@ -97,11 +116,200 @@
"RSA-SHA1"
end.
-signature_method(_Consumer={_, _, Method}) ->
- Method.
+plaintext_signature(Consumer, TokenSecret) ->
+ uri_join([consumer_secret(Consumer), TokenSecret]).
-consumer_secret(_Consumer={_, Secret, _}) ->
- Secret.
+plaintext_verify(Signature, Consumer, TokenSecret) ->
+ verify_in_constant_time(Signature, plaintext_signature(Consumer, TokenSecret)).
-consumer_key(_Consumer={Key, _, _}) ->
+hmac_sha1_signature(HttpMethod, URL, Params, Consumer, TokenSecret) ->
+ BaseString = signature_base_string(HttpMethod, URL, Params),
+ hmac_sha1_signature(BaseString, Consumer, TokenSecret).
+
+hmac_sha1_signature(BaseString, Consumer, TokenSecret) ->
+ Key = uri_join([consumer_secret(Consumer), TokenSecret]),
+ base64:encode_to_string(crypto:sha_mac(Key, BaseString)).
+
+hmac_sha1_verify(Signature, HttpMethod, URL, Params, Consumer, TokenSecret) ->
+ verify_in_constant_time(Signature, hmac_sha1_signature(HttpMethod, URL, Params, Consumer, TokenSecret)).
+
+hmac_sha1_verify(Signature, BaseString, Consumer, TokenSecret) ->
+ verify_in_constant_time(Signature, hmac_sha1_signature(BaseString, Consumer, TokenSecret)).
+
+rsa_sha1_signature(HttpMethod, URL, Params, Consumer) ->
+ BaseString = signature_base_string(HttpMethod, URL, Params),
+ rsa_sha1_signature(BaseString, Consumer).
+
+rsa_sha1_signature(BaseString, Consumer) ->
+ Key = read_private_key(consumer_secret(Consumer)),
+ base64:encode_to_string(public_key:sign(list_to_binary(BaseString), sha, Key)).
+
+rsa_sha1_verify(Signature, HttpMethod, URL, Params, Consumer) ->
+ BaseString = signature_base_string(HttpMethod, URL, Params),
+ rsa_sha1_verify(Signature, BaseString, Consumer).
+
+rsa_sha1_verify(Signature, BaseString, Consumer) ->
+ Key = read_cert_key(consumer_secret(Consumer)),
+ public_key:verify(to_binary(BaseString), sha, base64:decode(Signature), Key).
+
+verify_in_constant_time(<<X/binary>>, <<Y/binary>>) ->
+ verify_in_constant_time(binary_to_list(X), binary_to_list(Y));
+verify_in_constant_time(X, Y) when is_list(X) and is_list(Y) ->
+ case length(X) == length(Y) of
+ true ->
+ verify_in_constant_time(X, Y, 0);
+ false ->
+ false
+ end.
+
+verify_in_constant_time([X | RestX], [Y | RestY], Result) ->
+ verify_in_constant_time(RestX, RestY, (X bxor Y) bor Result);
+verify_in_constant_time([], [], Result) ->
+ Result == 0.
+
+signature_base_string(HttpMethod, URL, Params) ->
+ uri_join([HttpMethod, uri_normalize(URL), params_encode(Params)]).
+
+params_encode(Params) ->
+ % cf. http://tools.ietf.org/html/rfc5849#section-3.4.1.3.2
+ Encoded = [{uri_encode(K), uri_encode(V)} || {K, V} <- Params],
+ Sorted = lists:sort(Encoded),
+ Concatenated = [lists:concat([K, "=", V]) || {K, V} <- Sorted],
+ string:join(Concatenated, "&").
+
+params_decode(_Response={{_, _, _}, _, Body}) ->
+ uri_params_decode(Body).
+
+http_request(Method, Request, Options) ->
+ httpc:request(Method, Request, [{autoredirect, false}], Options).
+
+unix_timestamp() ->
+ unix_timestamp(calendar:universal_time()).
+
+unix_timestamp(DateTime) ->
+ unix_seconds(DateTime) - unix_epoch().
+
+unix_epoch() ->
+ unix_seconds({{1970,1,1},{00,00,00}}).
+
+unix_seconds(DateTime) ->
+ calendar:datetime_to_gregorian_seconds(DateTime).
+
+read_cert_key(Path) when is_list(Path) ->
+ {ok, Contents} = file:read_file(Path),
+ [{'Certificate', DerCert, not_encrypted}] = public_key:pem_decode(Contents),
+ read_cert_key(public_key:pkix_decode_cert(DerCert, otp));
+read_cert_key(#'OTPCertificate'{tbsCertificate=Cert}) ->
+ read_cert_key(Cert);
+read_cert_key(#'OTPTBSCertificate'{subjectPublicKeyInfo=Info}) ->
+ read_cert_key(Info);
+read_cert_key(#'OTPSubjectPublicKeyInfo'{subjectPublicKey=Key}) ->
Key.
+
+read_private_key(Path) ->
+ {ok, Contents} = file:read_file(Path),
+ [Info] = public_key:pem_decode(Contents),
+ public_key:pem_entry_decode(Info).
+
+to_binary(Term) when is_list(Term) ->
+ list_to_binary(Term);
+to_binary(Term) when is_binary(Term) ->
+ Term.
+
+header_params_encode(Params) ->
+ intercalate(", ", [lists:concat([uri_encode(K), "=\"", uri_encode(V), "\""]) || {K, V} <- Params]).
+
+header_params_decode(String) ->
+ [header_param_decode(Param) || Param <- re:split(String, ",\\s*", [{return, list}]), Param =/= ""].
+
+header_param_decode(Param) ->
+ [Key, QuotedValue] = string:tokens(Param, "="),
+ Value = string:substr(QuotedValue, 2, length(QuotedValue) - 2),
+ {uri_decode(Key), uri_decode(Value)}.
+
+uri_normalize(URI) ->
+ case http_uri:parse(URI) of
+ {ok, {Scheme, UserInfo, Host, Port, Path, _Query}} -> % R15B
+ uri_normalize(Scheme, UserInfo, string:to_lower(Host), Port, [Path]);
+ {Scheme, UserInfo, Host, Port, Path, _Query} ->
+ uri_normalize(Scheme, UserInfo, string:to_lower(Host), Port, [Path]);
+ Else ->
+ Else
+ end.
+
+uri_normalize(http, UserInfo, Host, 80, Acc) ->
+ uri_normalize(http, UserInfo, [Host|Acc]);
+uri_normalize(https, UserInfo, Host, 443, Acc) ->
+ uri_normalize(https, UserInfo, [Host|Acc]);
+uri_normalize(Scheme, UserInfo, Host, Port, Acc) ->
+ uri_normalize(Scheme, UserInfo, [Host, ":", Port|Acc]).
+
+uri_normalize(Scheme, [], Acc) ->
+ lists:concat([Scheme, "://" | Acc]);
+uri_normalize(Scheme, UserInfo, Acc) ->
+ lists:concat([Scheme, "://", UserInfo, "@" | Acc]).
+
+uri_params_encode(Params) ->
+ intercalate("&", [uri_join([K, V], "=") || {K, V} <- Params]).
+
+uri_params_decode(String) ->
+ [uri_param_decode(Substring) || Substring <- string:tokens(String, "&")].
+
+uri_param_decode(String) ->
+ [Key, Value] = string:tokens(String, "="),
+ {uri_decode(Key), uri_decode(Value)}.
+
+uri_join(Values) ->
+ uri_join(Values, "&").
+
+uri_join(Values, Separator) ->
+ string:join([uri_encode(Value) || Value <- Values], Separator).
+
+intercalate(Sep, Xs) ->
+ lists:concat(intersperse(Sep, Xs)).
+
+intersperse(_, []) ->
+ [];
+intersperse(_, [X]) ->
+ [X];
+intersperse(Sep, [X | Xs]) ->
+ [X, Sep | intersperse(Sep, Xs)].
+
+uri_encode(Term) when is_integer(Term) ->
+ integer_to_list(Term);
+uri_encode(Term) when is_atom(Term) ->
+ uri_encode(atom_to_list(Term));
+uri_encode(Term) when is_list(Term) ->
+ uri_encode(lists:reverse(Term, []), []).
+
+-define(is_alphanum(C), C >= $A, C =< $Z; C >= $a, C =< $z; C >= $0, C =< $9).
+
+uri_encode([X | T], Acc) when ?is_alphanum(X); X =:= $-; X =:= $_; X =:= $.; X =:= $~ ->
+ uri_encode(T, [X | Acc]);
+uri_encode([X | T], Acc) ->
+ NewAcc = [$%, dec2hex(X bsr 4), dec2hex(X band 16#0f) | Acc],
+ uri_encode(T, NewAcc);
+uri_encode([], Acc) ->
+ Acc.
+
+uri_decode(Str) when is_list(Str) ->
+ uri_decode(Str, []).
+
+uri_decode([$%, A, B | T], Acc) ->
+ uri_decode(T, [(hex2dec(A) bsl 4) + hex2dec(B) | Acc]);
+uri_decode([X | T], Acc) ->
+ uri_decode(T, [X | Acc]);
+uri_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.
diff --git a/oauth_hmac_sha1.erl b/oauth_hmac_sha1.erl
deleted file mode 100644
index 35549cf..0000000
--- a/oauth_hmac_sha1.erl
+++ /dev/null
@@ -1,11 +0,0 @@
--module(oauth_hmac_sha1).
-
--export([signature/3, verify/4]).
-
-
-signature(BaseString, CS, TS) ->
- Key = oauth_uri:calate("&", [CS, TS]),
- base64:encode_to_string(crypto:sha_mac(Key, BaseString)).
-
-verify(Signature, BaseString, CS, TS) ->
- couch_util:verify(Signature, signature(BaseString, CS, TS)).
diff --git a/oauth_http.erl b/oauth_http.erl
deleted file mode 100644
index 92c806c..0000000
--- a/oauth_http.erl
+++ /dev/null
@@ -1,22 +0,0 @@
--module(oauth_http).
-
--export([get/1, post/2, response_params/1, response_body/1, response_code/1]).
-
-
-get(URL) ->
- request(get, {URL, []}).
-
-post(URL, Data) ->
- request(post, {URL, [], "application/x-www-form-urlencoded", Data}).
-
-request(Method, Request) ->
- httpc:request(Method, Request, [{autoredirect, false}], []).
-
-response_params(Response) ->
- oauth_uri:params_from_string(response_body(Response)).
-
-response_body({{_, _, _}, _, Body}) ->
- Body.
-
-response_code({{_, Code, _}, _, _}) ->
- Code.
diff --git a/oauth_plaintext.erl b/oauth_plaintext.erl
deleted file mode 100644
index 9544a0a..0000000
--- a/oauth_plaintext.erl
+++ /dev/null
@@ -1,10 +0,0 @@
--module(oauth_plaintext).
-
--export([signature/2, verify/3]).
-
-
-signature(CS, TS) ->
- oauth_uri:calate("&", [CS, TS]).
-
-verify(Signature, CS, TS) ->
- couch_util:verify(Signature, signature(CS, TS)).
diff --git a/oauth_rsa_sha1.erl b/oauth_rsa_sha1.erl
deleted file mode 100644
index 6f4828e..0000000
--- a/oauth_rsa_sha1.erl
+++ /dev/null
@@ -1,30 +0,0 @@
--module(oauth_rsa_sha1).
-
--export([signature/2, verify/3]).
-
--include_lib("public_key/include/public_key.hrl").
-
-
-signature(BaseString, PrivateKeyPath) ->
- {ok, [Info]} = public_key:pem_to_der(PrivateKeyPath),
- {ok, PrivateKey} = public_key:decode_private_key(Info),
- base64:encode_to_string(public_key:sign(list_to_binary(BaseString), PrivateKey)).
-
-verify(Signature, BaseString, PublicKey) ->
- public_key:verify_signature(to_binary(BaseString), sha, base64:decode(Signature), public_key(PublicKey)).
-
-to_binary(Term) when is_list(Term) ->
- list_to_binary(Term);
-to_binary(Term) when is_binary(Term) ->
- Term.
-
-public_key(Path) when is_list(Path) ->
- {ok, [{cert, DerCert, not_encrypted}]} = public_key:pem_to_der(Path),
- {ok, Cert} = public_key:pkix_decode_cert(DerCert, otp),
- public_key(Cert);
-public_key(#'OTPCertificate'{tbsCertificate=Cert}) ->
- public_key(Cert);
-public_key(#'OTPTBSCertificate'{subjectPublicKeyInfo=Info}) ->
- public_key(Info);
-public_key(#'OTPSubjectPublicKeyInfo'{subjectPublicKey=Key}) ->
- Key.
diff --git a/oauth_unix.erl b/oauth_unix.erl
deleted file mode 100644
index 73ca314..0000000
--- a/oauth_unix.erl
+++ /dev/null
@@ -1,16 +0,0 @@
--module(oauth_unix).
-
--export([timestamp/0]).
-
-
-timestamp() ->
- timestamp(calendar:universal_time()).
-
-timestamp(DateTime) ->
- seconds(DateTime) - epoch().
-
-epoch() ->
- seconds({{1970,1,1},{00,00,00}}).
-
-seconds(DateTime) ->
- calendar:datetime_to_gregorian_seconds(DateTime).
diff --git a/oauth_uri.erl b/oauth_uri.erl
deleted file mode 100644
index aebf093..0000000
--- a/oauth_uri.erl
+++ /dev/null
@@ -1,100 +0,0 @@
--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
- {ok, {Scheme, UserInfo, Host, Port, Path, _Query}} -> % R15B
- normalize(Scheme, UserInfo, string:to_lower(Host), Port, [Path]);
- {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.
