Node.js在ACE下启动失败

哪位高大上来回答下

main.js代码：



var express = require('express');
var path = require('path');


var app = express();


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');


app.use(express.static(path.join(__dirname, 'public')));


app.use('/', require('./routes/index'));
app.use('/book', require('./routes/book'));
app.use('/top', require('./routes/top'));
app.use('/searchcount',require('./routes/searchcount'));
app.use('/searchword',require('./routes/searchword'));
app.use('/stat',require('./routes/stat'));


// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});


// error handlers


// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}


// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});




module.exports = app;