title: how to use Wildcards in koa-route
body: <pre><code>var path = require('path')
  var route= require('koa-route');//路由
  app.use(route.get('/api/*',api.before));
  </code></pre>
  
  <p>I can't use it for this,how should I use wildcards in koa-route? Or,which other can do ?</p>
  
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