注意 encodeURIComponent() 的 URIError: URI malformed
原以为 encodeURIComponent() 是一个安全的不会抛异常的方法，但是最近日志里面捕获到一个 URIError，来自querystring.js
google了一下，从这段代码的实现，可以复现此异常:
> encodeURIComponent(String.fromCharCode(0xDFFF))
URIError: URI malformed
at repl:1:2
at REPLServer.eval (repl.js:80:21)
at Interface.<anonymous> (repl.js:182:12)
at Interface.emit (events.js:67:17)
at Interface._onLine (readline.js:162:10)
at Interface._line (readline.js:426:8)
at Interface._ttyWrite (readline.js:603:14)
at ReadStream.<anonymous> (readline.js:82:12)
at ReadStream.emit (events.js:88:20)
at ReadStream._emitKey (tty.js:327:10)
现在还没解决的疑问，是这种数据是如何传递过去的。
6 回复
昨天无意间捕捉到了这个错误：
URIError: URI malformed
at f:\nodeclub\nodeclub\node_modules\express\node_modules\connect\lib\middleware\static.js:119:14
at Object.static [as handle] (f:\nodeclub\nodeclub\node_modules\express\node_modules\connect\lib\middleware\static.j
s:60:5)
at next (f:\nodeclub\nodeclub\node_modules\express\node_modules\connect\lib\http.js:204:15)
at f:\nodeclub\nodeclub\node_modules\express\node_modules\connect\lib\middleware\csrf.js:80:37
at Object.handle (f:\nodeclub\nodeclub\app.js:39:5)
at next (f:\nodeclub\nodeclub\node_modules\express\node_modules\connect\lib\http.js:204:15)
at f:\nodeclub\nodeclub\controllers\sign.js:280:14
at f:\nodeclub\nodeclub\controllers\message.js:215:12
at f:\nodeclub\nodeclub\node_modules\mongoose\lib\utils.js:408:16
at [object Object].<anonymous> (f:\nodeclub\nodeclub\node_modules\mongoose\node_modules\mongodb\lib\mongodb\collecti
on.js:531:7)
不知道怎么出来的，后来再试，无法复现
cookie0.0.4会有此问题，我提交了一个pull request，估计不会被接受。https://github.com/shtylman/node-cookie/pull/8
我这边是因为 % 引起的 decodeURIComponent("%") ----->Uncaught URIError: URI malformed decodeURIComponent("%25") ----->%
