title: Replacement for req.param() that is deprecated in Express 4
body: <p>We are migrating from ExpressJS 3 to ExpressJS 4, and we noted that the following APIs are being deprecated:</p>
  
  <pre><code>req.param(fieldName)
  req.param(fieldName, defaultValue)
  </code></pre>
  
  <p>Is there a middleware that brings these APIs back, like other APIs that were 'externalized' from express to independent modules ?</p>
  
  <p>EDITED:
  Clarification - The need is an API that provides an abstracted generic access to a parameter, regardless to if it is a path-parameter, a query-string parameter, or a body field.</p>