Express 路径请求及对应的获取路径形式

req.query

// GET /search?q=tobi+ferret
req.query.q
// => "tobi ferret"  

// GET /shoes?order=desc&shoe[color]=blue&shoe[type]=converse
req.query.order
// => "desc"  

req.query.shoe.color
// => "blue"  

req.query.shoe.type
// => "converse"  

req.body

// POST user[name]=tobi&user[email]=tobi@learnboost.com
req.body.user.name
// => "tobi"  

req.body.user.email
// => "tobi@learnboost.com"  

// POST { "name": "tobi" }
req.body.name
// => "tobi" 

req.params

// GET /user/tj
req.params.name
// => "tj"  

// GET /file/javascripts/jquery.js
req.params[0]
// => "javascripts/jquery.js"  

req.param(name)

// ?name=tobi
req.param('name')
// => "tobi"  

// POST name=tobi
req.param('name')
// => "tobi"  

// /user/tobi for /user/:name
req.param('name')
// => "tobi"

参考网址：
https://github.com/nswbmw/N-blog/blob/backup/book/%E7%AC%AC1%E7%AB%A0%20%E4%B8%80%E4%B8%AA%E7%AE%80%E5%8D%95%E7%9A%84%E5%8D%9A%E5%AE%A2.md