本来是decodeURIComponent(escape(…))就能解决一切问题的。但是到了Node.js上貌似会变得很复杂 之前就找到遇到同样问题的人了，不过在Github上讨论的方法貌似用在我的项目上是不行的。用到了 querystring.decode(querystring.escape) ，虽然没有报错，但是却是乱码。

URIError: URI malformed
    at decodeURIComponent (native)
    at charenc_UTF8_bytesToString (E:\SourceBox\AuthSite\models\eLib.js:175:12)
    at Object.dec (E:\SourceBox\AuthSite\models\eLib.js:152:9)
    at E:\SourceBox\AuthSite\routes\index.js:7:33
    at callbacks (E:\SourceBox\AuthSite\node_modules\express\lib\router\index.js:161:37)
    at param (E:\SourceBox\AuthSite\node_modules\express\lib\router\index.js:135:11)
    at pass (E:\SourceBox\AuthSite\node_modules\express\lib\router\index.js:142:5)
    at Router._dispatch (E:\SourceBox\AuthSite\node_modules\express\lib\router\index.js:170:5)
    at Object.router (E:\SourceBox\AuthSite\node_modules\express\lib\router\index.js:33:10)
    at next (E:\SourceBox\AuthSite\node_modules\express\node_modules\connect\lib\proto.js:199:15)

实在不知道怎么去解决。 谢谢大家了~