gistfile1.js

server.route({
  method: 'get',
  path: '/some/proxy',
  handler: function (request, reply) {
    
    request.query.something = 'whatever_static_value';
    
    reply.proxy({
      uri: 'http://some.upstream',
      onResponse: function (err, res, request, reply, settings, ttl) {
        
        Nipple.read(res, function (err, body) {
          
          // do something with res
          reply(res);
        })
      }
    })
  }
})