Express之get,pos请求参数的获取

express的版本4.x

get

query参数的获取

url假设:http://localhost:3000/users/zqzjs?name=zhaoqize&word=cool&job[st]=web

路由的定义:

router.get('/:name', function(req, res, next) {
})

1.获取?name=zhaoqize这样的参数

req.query.name

2.获取&job[st]=web这样的参数

req.query.job.st

3.获取?name=zhaoqize参数的另外一种写法(4.x版本中该方法已被废弃)

req.param('name')

4.获取所有参数

json.stringify(req.query)

具体代码:

//http://localhost:3000/users/zqzjs?name=zhaoqize&word=cool&job[st]=web
//http://localhost:3000/users/zqzjs
router.get('/:name', function(req, res, next) {
 //4.版本中已被废弃，不建议使用
 req.param('name')
 console.log(json.stringify(req.query) || '')
 //获取get请求参数
 var _html = "params"+
       "<p><strong>req.params:</strong>"+(json.stringify(req.params) || '')+"</p>" +
       "<p><strong>req.params.name:</strong>"+(req.params.name || '')+"</p>" +
       "query:" +
       "<p><strong>req.query:</strong>"+(json.stringify(req.query) || '')+"</p>" +
       "<p><strong>req.query.name:</strong>"+(req.query.name || '')+"</p>" +
       "<p><strong>req.query.word:</strong>"+(req.query.word || '')+"</p>"+
       "<p><strong>req.query.job.st:</strong>"+(req.query.job.st || '')+"</p>" +
       "<p><strong>req.param('name'):</strong>"+(req.param('name') || '')+"</p>" ;
       

 res.send(_html);
});

结果:

[get]
params
req.params:{"name":"zqzjs"}

req.params.name:zqzjs

query:

req.query:{"name":"zhaoqize","word":"cool","job":{"st":"web"}}

req.query.name:zhaoqize

req.query.word:cool

req.query.job.st:web

req.param('name'):zqzjs

post

post的数据获取

form data 
 pname:zqz
 pword:job

1.获取需要的query参数

req.body.pname

具体代码:

router.post('/posttest',function(req, res, next){
  var _html = "[post]" +
        "<p><strong>req.body:</strong>"+(json.stringify(req.body) || '')+"</p>" +
        "<p><strong>req.body.name:</strong>"+(req.body.pname || '')+"</p>" +
        "<p><strong>req.body.name:</strong>"+(req.body.pword || '')+"</p>";
  res.send(_html);
})

结果:

[post]
req.body:{"pname":"zqz","pword":"job"}

req.body.name:zqz

req.body.name:job

其他信息

获取请求的头信息

使用:req.header(field)

//http://localhost:3000/users/requestinfo/get
router.get('/requestinfo/get',function(req, res, next){
  var _html = "";
  _html += "[accept] "+req.header('accept')+"<br/>"
  _html += "[accept-encoding] "+req.header('accept-encoding')+"<br/>"
  _html += "[accept-language] "+req.header('accept-language')+"<br/>"
  _html += "[cache-control] "+req.header('cache-control')+"<br/>"
  _html += "[connection] "+req.header('connection')+"<br/>"
  _html += "[cookie] "+req.header('cookie')+"<br/>"
  _html += "[host] "+req.header('host')+"<br/>"
  _html += "[if-none-match] "+req.header('if-none-match')+"<br/>"
  _html += "[upgrade-insecure-requests] "+req.header('upgrade-insecure-requests')+"<br/>"
  _html += "[user-agent] "+req.header('user-agent')+"<br/>"
  res.send(_html);
})

//结果:
[accept] text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
[accept-encoding] gzip, deflate, sdch, br
[accept-language] zh-cn,zh;q=0.8,en-us;q=0.6,en;q=0.4,ja;q=0.2
[cache-control] max-age=0
[connection] keep-alive
[cookie] hm_lvt_4f16d955a2236fc6ca7287644ecc9d79=1480576847,1481166685
[host] localhost:3000
[if-none-match] w/"23b-ojtnczfcltvw659cygllra"
[upgrade-insecure-requests] 1
[user-agent] mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/54.0.2840.99 safari/537.36

route

使用:req.route

//http://localhost:3000/users/router/get
router.get('/router/get',function(req, res, next){
  res.send(req.route);
})
//结果：
{
path: "/router/get",
stack: [
{
name: "<anonymous>",
keys: [ ],
regexp: { },
method: "get"
}
],
methods: {
get: true
}
}

cookies

使用:req.cookies

//http://localhost:3000/users/cookies/get
router.get('/cookies/get',function(req, res, next){
  res.send(req.cookies);
})

//结果：
{
hm_lvt_4f16d955a2236fc6ca7287644ecc9d79: "1480576847,1481166685"
}

hostname

使用:req.hostname

//http://localhost:3000/users/hostname/get
router.get('/hostname/get',function(req, res, next){
  res.send(req.hostname);
})

//结果:
localhost

ip

使用:req.ip

//http://localhost:3000/users/ip/get
router.get('/ip/get',function(req, res, next){
  res.send(req.ip);
})

//结果:
::1

originalurl

使用:req.originalurl

//http://localhost:3000/users/originalurl/get
router.get('/originalurl/get',function(req, res, next){
  res.send(req.originalurl);
})

//结果:
/users/originalurl/get

protocol

使用:req.protocol

//http://localhost:3000/users/protocol/get
router.get('/protocol/get',function(req, res, next){
  res.send(req.protocol);
})

//结果:
http

secure

使用:req.secure

说明:用来判断协议是否安全,如果是https，返回的就是true

//http://localhost:3000/users/secure/get
router.get('/secure/get',function(req, res, next){
  res.send(req.secure);
})

//结果:
false

xhr

使用:req.xhr

说明:判断是否是异步请求

//http://localhost:3000/users/xhr/get
router.get('/xhr/get',function(req, res, next){
  res.send(req.xhr);
})

//结果:
false

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