nodejs部署到bae上push问题及连接数据库问题

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部署BAE提交GIT版本时报错 - RPC failed; result=22, HTTP code = 411


　　报错的主要内容是：RPC failed; result=22, HTTP code = 411； 原先以为是BAE上传文件大小有限制，最后查明导致该错误是因为默认 Git 设置 http post 的缓存为 1MB，只需要将其设置为更大值即可；

以下是报错内容

Counting objects: 172, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (159/159), done.
error: RPC failed; result=22, HTTP code = 411
fatal: The remote end hung up unexpectedly
Writing objects: 100% (171/171), 1.62 MiB | 2.06 MiB/s, done.
Total 171 (delta 35), reused 0 (delta 0)
fatal: The remote end hung up unexpectedly
Everything up-to-date

解决方法（在命令行执行）

git config http.postBuffer 524288000 


　　上述代码将 http post 的缓存大小设置为 500M；
　　http://www.qetee.com/error-recover/git-error-411.html
使用express框架时，用MongoDB存放session时，出现错误如下：


D:\WorkSpace\nodejs\user\node_modules\connect-mongo\lib\connect-mongo.js:153
          throw new Error('Error connecting to database');
                ^
Error: Error connecting to database
    at D:\WorkSpace\nodejs\user\node_modules\connect-mongo\lib\connect-mongo.js:153:17
    at D:\WorkSpace\nodejs\user\node_modules\connect-mongo\node_modules\mongodb\lib\mongodb\db.js:229:16
    at null.<anonymous> (D:\WorkSpace\nodejs\user\node_modules\connect-mongo\node_modules\mongodb\lib\mongodb\connection\server.js:578:7)
    at EventEmitter.emit (events.js:106:17)
    at null.<anonymous> (D:\WorkSpace\nodejs\user\node_modules\connect-mongo\node_modules\mongodb\lib\mongodb\connection\connection_pool.js:139:15)
    at EventEmitter.emit (events.js:98:17)
    at Socket.<anonymous> (D:\WorkSpace\nodejs\user\node_modules\connect-mongo\node_modules\mongodb\lib\mongodb\connection\connection.js:475:10)
    at Socket.EventEmitter.emit (events.js:95:17)
    at net.js:441:14
    at process._tickCallback (node.js:415:13)
解决方法如下：
(数据库不带用户和密码的方法)
 
将  store: new MongoStore({db:settings.db})
替换成     store: new MongoStore({host:settings.host, port:settings.port, db:settings.db)})
在开始加上  format = require('util').format
app.use(express.session({
    secret: settings.cookieSecret,
    key: settings.db,
    cookie: {maxAge: 1000 * 60 * 30},//30 minute
    store: new MongoStore({host:settings.host, port:settings.port, db:settings.db)})
    /*store: new MongoStore({db:settings.db})*/
}));
(数据库带用户和密码的方法)
将  store: new MongoStore({db:settings.db})
替换成     store: new MongoStore({url:format("mongodb://%s:%s@%s:%s/%s",settings.uid, settings.pwd, settings.host, settings.port, settings.db)})
在开始加上  format = require('util').format
app.use(express.session({
    secret: settings.cookieSecret,
    key: settings.db,
    cookie: {maxAge: 1000 * 60 * 30},//30 minute
    store: new MongoStore({url:format("mongodb://%s:%s@%s:%s/%s",settings.uid, settings.pwd, settings.host, settings.port, settings.db)})
    /*store: new MongoStore({db:settings.db})*/
}));
　　http://blog.csdn.net/sanpo/article/details/9188883