问题一：

　　{ [Error: Cannot find module '../build/Release/bson'] code: 'MODULE_NOT_FOUND' }

　　js-bson: Failed to load c++ bson extension, using pure JS version

 

   解决办法：

　

 

　　将index.js文件，catch模块中的

　　bson = require('../build/Release/bson'); 　　改为：

　　bson = require('../browser_build/bson');   如图所示：

     

 

 

问题二：

　　express-session deprecated undefined resave option; provide resave option app.js:39:9

　　express-session deprecated undefined saveUninitialized option; provide saveUninitialized option app.js:39:9

 

 解决办法：

添加 resave: false, 　　  saveUninitialized: true,

app.use(session({    secret: settings.cookieSecret,    key: settings.db,  //cookie name    cookie: {maxAge: 1000 * 60 * 60 * 24 * 30}, //30days    resave: false,    saveUninitialized: true,    store: new MongoStore({        db: settings.db,        host: settings.host,        port: settings.port    })}));