Compatibility with morgan

[realhidden]

With a few small modification this plugin can be compatible with morgan logging.

Take this example code:

var apirouter = express.Router();
apirouter.use(morgan('dev'));

apirouter.use(function (req, res, next) {
  res.json({magic:true});
});

app.use('/api',apirouter);

This outputs:

post /user - - ms - -
post /user - - ms - -

But with a "small" middleware:

var apirouter = express.Router();

apirouter.use(function(req,res,next){
  if (typeof res.socket == 'undefined') {
    res.socket = {
      writable: true
    };
    res.__onFinished={
      queue: []
    };
    res._header = {
      status: 200
    };
    res.getHeader = function(type){
      return res._header[type];
    };

    res.finished = false;
    res.writeHead = function(){
      res.statusCode = res._header.status;
      res.__onFinished.queue[0]();
    };

    var oldSendStatus = res.sendStatus;
    res.sendStatus = function (status){
      res._header['status']
      return oldSendStatus(status);
    }

    var oldsend = res.send;
    res.end = res.send = res.json = function(data){
      if (typeof data != 'string'){
        res._header['content-length'] = JSON.stringify(data).length;
      }else{
        res._header['content-length'] = data.length;
      }
      res.writeHead();
      return oldsend.apply(this, arguments);
    }
  }
  return next();

});
apirouter.use(morgan('dev'));

apirouter.use(function (req, res, next) {
  res.json({magic:true});
});

app.use('/api',apirouter);

Morgan logging is fixed:

post /user 200 0.731 ms - 14
post /user 200 0.115 ms - 14
post /user 200 0.063 ms - 14
post /user 200 0.313 ms - 14

[svbatalov]

Very nice, thanks for sharing! It would definitely be useful to have loggers etc work out of the box. PR's are welcome! :) PS. Looks like you've forgot to assign res._header['status'] in sendStatus().