我在使用 Ruby 中的 Base64.decode64 解码字符串时遇到问题。作为测试，我正在使用这个网站来解码 php 中的字符串：https : //rnd.feide.no/simplesaml/module.php/saml2debug/debug.php。
作为测试，我使用这个字符串：
fZJNT%2BMwEIbvSPwHy%2Fd8tMvHympSdUGISuwS0cCBm%2BtMUwfbk%2FU4zfLvSVMq2Euv45n3fd7xzOb%2FrGE78KTRZXwSp5yBU1hpV2f8ubyLfvJ5fn42I2lNKxZd2Lon%2BNsBBTZMOhLjQ8Y77wRK0iSctEAiKLFa%2FH4Q0zgVrceACg1ny9uMy7rCdaM2%2Bs0BWrtppK2UAdeoVjW2ruq1bevGImcvR6zpHmtJ1MHSUZAuDKU0vY7Si2h6VU5%2BiMuJuLx65az4dPql3SHBKaz1oYnEfVkWUfG4KkeBna7A%2Fxm6M14j1gZihZazBRH4MODcoKPOgl%2BB32kFz08PGd%2BG0JJIkr7v46%2BhRCaEpod17DCRivYZCkmkd4N28B3wfNyrGKP5bws9DS6PKDz%2FMpsl36Tyz%2F%2Fax1jeFmi0emcLY7C%2F8SDD0Z7dobcynHbbV3QVbcZW0TlqQemNhoqzJD%2B4%2Fn8Yw7l8AA%3D%3D
输出应该是：
<?xml version="1.0" encoding="UTF-8"?>
<samlp:AuthnRequest xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" ID="agdobjcfikneommfjamdclenjcpcjmgdgbmpgjmo" Version="2.0" IssueInstant="2007-04-26T13:51:56Z" ProtocolBinding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" ProviderName="google.com" AssertionConsumerServiceURL="https://www.google.com/a/solweb.no/acs" IsPassive="true"><saml:Issuer xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion">google.com</saml:Issuer><samlp:NameIDPolicy AllowCreate="true" Format="urn:oasis:names:tc:SAML:2.0:nameid-format:unspecified" /></samlp:AuthnRequest>
但是在 Ruby 中，我不断得到一个奇怪的输出：
}\222MO?0\206?H?\a??|\264???jRuA\210J????\233?LS\a??8???IS*?K\257??}????\377\254a;??e|\022\247\234\201SXiWg????~?y~~6#iM+\026]?'??6L:\022?C?;?J?$\234\264@\"(\261Z?~?8\255?\n\rg??\214??u\2436??Z?i\244\255\224\001?V5\266\256?m??"g/G\254?kI???Q\220.\f\2454\275\216?hzUN~\210?\270\274z??t???!?)\254????}Y\026Q?*G\201\235\256??\031\2723^#?b\205\226\263\005\021?0??\243?_\201?i\005?O\017\031??H\222\276??\241D&\204\246\207u?0?\212?
I\244w\203v??|?\030\243?o
.\217(<\3772\233%??????X?h\264zg\vc\260\277? ??\236?\2672\234v?Wt\025m?V?9jA?\212\263$?\270\376\177\030ù|\000
我使用的代码是：
require 'cgi'
require 'base64'
Base64::decode64(CGI::unescape('fZJNT%2BMwEIbvSPwHy%2Fd8tMvHympSdUGISuwS0cCBm%2BtMUwfbk%2FU4zfLvSVMq2Euv45n3fd7xzOb%2FrGE78KTRZXwSp5yBU1hpV2f8ubyLfvJ5fn42I2lNKxZd2Lon%2BNsBBTZMOhLjQ8Y77wRK0iSctEAiKLFa%2FH4Q0zgVrceACg1ny9uMy7rCdaM2%2Bs0BWrtppK2UAdeoVjW2ruq1bevGImcvR6zpHmtJ1MHSUZAuDKU0vY7Si2h6VU5%2BiMuJuLx65az4dPql3SHBKaz1oYnEfVkWUfG4KkeBna7A%2Fxm6M14j1gZihZazBRH4MODcoKPOgl%2BB32kFz08PGd%2BG0JJIkr7v46%2BhRCaEpod17DCRivYZCkmkd4N28B3wfNyrGKP5bws9DS6PKDz%2FMpsl36Tyz%2F%2Fax1jeFmi0emcLY7C%2F8SDD0Z7dobcynHbbV3QVbcZW0TlqQemNhoqzJD%2B4%2Fn8Yw7l8AA%3D%3D'))
可能有什么问题？提前致谢。