json-replacer.js

function scrub (obj) {                                    
  for(var attr in obj) {                                  
      if(obj.hasOwnProperty(attr)) {                      
          if (attr.charAt(1) === '_') {                   
              obj[attr] = true;                           
          }                                               
      }                                                   
  }                                                       
                                                          
  return obj;                                             
}                                                         
                                                          
                                                          
server.ext('onPostHandler', function (request, next) {    
                                                          
    var response = request.response();                    
                                                          
    if (response.variety === 'obj') {                     
                                                          
        var raw = response.raw;                           
                                                          
        if (raw instanceof Array) {                       
                                                          
            response.raw = raw.map(scrub);                
        } else if (raw instanceof Object) {               
                                                          
            response.raw = scrub(raw);                    
        }                                                 
                                                          
        response.update();                                
    }                                                     
                                                          
    next();                                               
});