diff options
Diffstat (limited to 'src/couchdb/couch_util.erl')
-rw-r--r-- | src/couchdb/couch_util.erl | 122 |
1 files changed, 13 insertions, 109 deletions
diff --git a/src/couchdb/couch_util.erl b/src/couchdb/couch_util.erl index ca36a6db..b7e237c1 100644 --- a/src/couchdb/couch_util.erl +++ b/src/couchdb/couch_util.erl @@ -16,8 +16,8 @@ -export([should_flush/0, should_flush/1, to_existing_atom/1]). -export([rand32/0, implode/2, collate/2, collate/3]). -export([abs_pathname/1,abs_pathname/2, trim/1, ascii_lower/1]). --export([encodeBase64/1, decodeBase64/1, encodeBase64Url/1, decodeBase64Url/1, - to_hex/1,parse_term/1, dict_find/3]). +-export([encodeBase64Url/1, decodeBase64Url/1]). +-export([to_hex/1, parse_term/1, dict_find/3]). -export([file_read_size/1, get_nested_json_value/2, json_user_ctx/1]). -export([to_binary/1, to_integer/1, to_list/1, url_encode/1]). -export([json_encode/1, json_decode/1]). @@ -232,114 +232,18 @@ should_flush(MemThreshHold) -> ProcMem2+BinMem2 > MemThreshHold; true -> false end. +encodeBase64Url(Url) -> + Url1 = iolist_to_binary(re:replace(base64:encode(Url), "=+$", "")), + Url2 = iolist_to_binary(re:replace(Url1, "/", "_", [global])), + iolist_to_binary(re:replace(Url2, "\\+", "-", [global])). -%%% Purpose : Base 64 encoding and decoding. -%%% Copied from ssl_base_64 to avoid using the -%%% erlang ssl library - --define(st(X,A), ((X-A+256) div 256)). - -%% A PEM encoding consists of characters A-Z, a-z, 0-9, +, / and -%% =. Each character encodes a 6 bits value from 0 to 63 (A = 0, / = -%% 63); = is a padding character. -%% - -%% -%% encode64(Bytes|Binary) -> binary -%% -%% Take 3 bytes a time (3 x 8 = 24 bits), and make 4 characters out of -%% them (4 x 6 = 24 bits). -%% -encodeBase64(Bs) when is_list(Bs) -> - encodeBase64(iolist_to_binary(Bs), <<>>); -encodeBase64(Bs) -> - encodeBase64(Bs, <<>>). - -encodeBase64(<<B:3/binary, Bs/binary>>, Acc) -> - <<C1:6, C2:6, C3:6, C4:6>> = B, - encodeBase64(Bs, <<Acc/binary, (enc(C1)), (enc(C2)), (enc(C3)), (enc(C4))>>); -encodeBase64(<<B:2/binary>>, Acc) -> - <<C1:6, C2:6, C3:6, _:6>> = <<B/binary, 0>>, - <<Acc/binary, (enc(C1)), (enc(C2)), (enc(C3)), $=>>; -encodeBase64(<<B:1/binary>>, Acc) -> - <<C1:6, C2:6, _:12>> = <<B/binary, 0, 0>>, - <<Acc/binary, (enc(C1)), (enc(C2)), $=, $=>>; -encodeBase64(<<>>, Acc) -> - Acc. - -encodeBase64Url(Bs) when is_list(Bs) -> - encodeBase64Url(list_to_binary(Bs), <<>>); -encodeBase64Url(Bs) -> - encodeBase64Url(Bs, <<>>). - -encodeBase64Url(<<B:3/binary, Bs/binary>>, Acc) -> - <<C1:6, C2:6, C3:6, C4:6>> = B, - encodeBase64Url(Bs, <<Acc/binary, (encUrl(C1)), (encUrl(C2)), (encUrl(C3)), (encUrl(C4))>>); -encodeBase64Url(<<B:2/binary>>, Acc) -> - <<C1:6, C2:6, C3:6, _:6>> = <<B/binary, 0>>, - <<Acc/binary, (encUrl(C1)), (encUrl(C2)), (encUrl(C3))>>; -encodeBase64Url(<<B:1/binary>>, Acc) -> - <<C1:6, C2:6, _:12>> = <<B/binary, 0, 0>>, - <<Acc/binary, (encUrl(C1)), (encUrl(C2))>>; -encodeBase64Url(<<>>, Acc) -> - Acc. - -%% -%% decodeBase64(BinaryChars) -> Binary -%% -decodeBase64(Cs) when is_list(Cs) -> - decodeBase64(list_to_binary(Cs)); -decodeBase64(Cs) -> - decode1(Cs, <<>>). - -decode1(<<C1, C2, $=, $=>>, Acc) -> - <<B1, _:16>> = <<(dec(C1)):6, (dec(C2)):6, 0:12>>, - <<Acc/binary, B1>>; -decode1(<<C1, C2, C3, $=>>, Acc) -> - <<B1, B2, _:8>> = <<(dec(C1)):6, (dec(C2)):6, (dec(C3)):6, (dec(0)):6>>, - <<Acc/binary, B1, B2>>; -decode1(<<C1, C2, C3, C4, Cs/binary>>, Acc) -> - Bin = <<Acc/binary, (dec(C1)):6, (dec(C2)):6, (dec(C3)):6, (dec(C4)):6>>, - decode1(Cs, Bin); -decode1(<<>>, Acc) -> - Acc. - -decodeBase64Url(Cs) when is_list(Cs) -> - decodeBase64Url(list_to_binary(Cs)); -decodeBase64Url(Cs) -> - decode1Url(Cs, <<>>). - -decode1Url(<<C1, C2>>, Acc) -> - <<B1, _:16>> = <<(decUrl(C1)):6, (decUrl(C2)):6, 0:12>>, - <<Acc/binary, B1>>; -decode1Url(<<C1, C2, C3>>, Acc) -> - <<B1, B2, _:8>> = <<(decUrl(C1)):6, (decUrl(C2)):6, (decUrl(C3)):6, (decUrl(0)):6>>, - <<Acc/binary, B1, B2>>; -decode1Url(<<C1, C2, C3, C4, Cs/binary>>, Acc) -> - Bin = <<Acc/binary, (decUrl(C1)):6, (decUrl(C2)):6, (decUrl(C3)):6, (decUrl(C4)):6>>, - decode1Url(Cs, Bin); -decode1Url(<<>>, Acc) -> - Acc. - -%% enc/1 and dec/1 -%% -%% Mapping: 0-25 -> A-Z, 26-51 -> a-z, 52-61 -> 0-9, 62 -> +, 63 -> / -%% -enc(C) -> - 65 + C + 6*?st(C,26) - 75*?st(C,52) -15*?st(C,62) + 3*?st(C,63). - -dec(C) -> - 62*?st(C,43) + ?st(C,47) + (C-59)*?st(C,48) - 69*?st(C,65) - 6*?st(C,97). - -%% encUrl/1 and decUrl/1 -%% -%% Mapping: 0-25 -> A-Z, 26-51 -> a-z, 52-61 -> 0-9, 62 -> -, 63 -> _ -%% -encUrl(C) -> - 65 + C + 6*?st(C,26) - 75*?st(C,52) -13*?st(C,62) + 49*?st(C,63). - -decUrl(C) -> - 62*?st(C,45) + (C-58)*?st(C,48) - 69*?st(C,65) + 33*?st(C,95) - 39*?st(C,97). +decodeBase64Url(Url64) -> + Url1 = re:replace(iolist_to_binary(Url64), "-", "+", [global]), + Url2 = iolist_to_binary( + re:replace(iolist_to_binary(Url1), "_", "/", [global]) + ), + Padding = ?l2b(lists:duplicate((4 - size(Url2) rem 4) rem 4, $=)), + base64:decode(<<Url2/binary, Padding/binary>>). dict_find(Key, Dict, DefaultValue) -> case dict:find(Key, Dict) of |