今天在用hexo写博文时遇到一个涉及中文的302问题，记录一下。

当访问链接为http://middle3.dev.vivo.xyz:4000/authors/测试时，控制台报错：

TypeError: The header content contains invalid characters
   at ServerResponse.OutgoingMessage.setHeader (_http_outgoing.js:358:11)
   at /home/hexo/blog/node_modules/hexo-server/lib/middlewares/route.js:27:11
   at call (/home/hexo/blog/node_modules/connect/index.js:239:7)
   at next (/home/hexo/blog/node_modules/connect/index.js:183:5)
   at /home/hexo/blog/node_modules/hexo-server/lib/middlewares/header.js:9:5
   at call (/home/hexo/blog/node_modules/connect/index.js:239:7)
   at next (/home/hexo/blog/node_modules/connect/index.js:183:5)
   at Function.handle (/home/hexo/blog/node_modules/connect/index.js:186:3)
   at Server.app (/home/hexo/blog/node_modules/connect/index.js:51:37)
   at emitTwo (events.js:106:13)
   at Server.emit (events.js:191:7)
   at HTTPParser.parserOnIncoming [as onIncoming] (_http_server.js:546:12)
   at HTTPParser.parserOnHeadersComplete (_http_common.js:99:23)

跟踪了下hexo-server/lib/middlewares/route.js的代码如下：

var url = route.format(decodeURIComponent(req.url));
var data = route.get(url);
var extname = pathFn.extname(url);

// When the URL is `foo/index.html` but users access `foo`, redirect to `foo/`.
if (!data) {
  if (extname) return next();

  res.statusCode = 302;
  res.setHeader('Location', root + url + '/');
  res.end('Redirecting');
  return;
}

这里url是decode出来的字符串，如果字符串里包含中文，然后调用res.setHeader方法即会报上面的错，解决方法也比较简单，加入一行即可：

if (!data) {
  if (extname) return next();

  url = encodeURI(url);

  res.statusCode = 302;
  res.setHeader('Location', root + url + '/');
  res.end('Redirecting');
  return;
}

进一步查了下，hexo-server的git版本是修复了这个问题的，见这里，但hexo依赖的hexo-server@0.2.0版本却没有修复这个问题，估计很多非英语用户都会遇到这个问题，真坑爹！