Node.js Taiwan Party 36 筆記 （屬雜記，請忽略我）

這偏是比較屬於個人雜記的部分，請忽略我...（應該只有我自己看得懂...）

Node.js TW 36th Party Note

Topic : Express

Starter need...

* node
* npm
* git
* grunt.js

Express → web base framework

express as cli

- e (ejs) -j(jhtml) -H(hogan)
- jade(as default)
- call help 
- c(css)
- s(session)  

express as css

- -css
- stylus (as default)

* why need template engine -> m”v”c 

run express cli

• express [-option] [app_name]

folder structure

• router (like controller + router)
• static file (at Public folder)
• app.js is init file

setting in Express

• app.listen (open port 3000)
• app.configure (read enviroment variable, ex: develpoment,production…)
• app.set, app.get
• app.enable, app.disable (ex, 不啓動view engine)
• app.use
  • user --> Middleware --> route --> view

    middleware : app.use , will excute every route.
  

• app.get
• app.post
• app.delete
• app.update
• app.all
• app.locals (少用)

req get parameter

• req.params（抓url）
  • req (像是讀檔案)
  • reponse (寫)

    app.get('/happymen/:id', function(req, res){
        var id = req.params.id;
    }); 
  

• req.query (取get的資料)
• req.body
• req.files
• req.cookies(read cookie) 重要。

req about HEADER (read only)

• req.get, req.header (這兩個是相通的)
• req.is (偵測)
• req.ip, req.ips
• req.host (req.subdomains)
• req.protocol, (req.secure-->'https' == req.protocol; 檢查目前browser是http/https)
• req.xhr (XMLHttpRequest)
• Request is READ only in ExpressJS
• req.status(res.statusCode) 設定header code要給多少（200,400,404,.....）
• req.clearCookie
• req.set, res.header
• req.locals(app.locals is different)
  • life circle is only in url period (<--這好酷)
• req.redirect (被設成302)
• req.json, res.send (HEADER:application/json)
• req.download
• req.render

Response write data in Express

cross domain access

• node.js 適合做 api，承載大量的連線 -> know how cross domain access