Nodejs给我下载而不是html响应

Here is my code:

这是我的代码:

var express = require('express'),
      app = express.createServer(express.logger());
app.use(express.bodyParser());
app.get('/', function(request, response) {
    var name = request.param('name', null);
    response.header('Content-Type', 'text/event-stream');
    var t = setInterval(function(){
        response.write('Hello World by '+name+' (using http-1.1 streaming data!)<br />');
    }, 2000);
    /*request.socket.on('close', function() {
        clearInterval(t);
    }); */
});

var port = process.env.PORT || 5000;
app.listen(port, function() {
    //clearInterval(t);

  console.log("Listening on " + port);
});
var express = requ