title: How to identify request (by ID) through middleware chain in Express.
body: <p>I am developping a RESTful server in node.js, using Express as framework, and Winston, for the moment, as logger module. 
  This server will handle a big amount of simultaneous request, and it would be very useful to me to be able to track the log entries for each specific request, using something like a 'request ID'. The straight solution is just to add this ID as another piece of logging information each time I want to make a log entry, but it will mean to pass the 'request ID' to each method used by the server.</p>
  
  <p>I would like to know if there is any node.js/javascript module or technique that would allow me to do this in an easier way, without carrying around the request ID for each specific request.</p>