Express之get,pos请求参数的获取

Express的版本4.X

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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"+
       "req.params:"+(JSON.stringify(req.params) || '')+"" +
       "req.params.name:"+(req.params.name || '')+"" +
       "Query:" +
       "req.query:"+(JSON.stringify(req.query) || '')+"" +
       "req.query.name:"+(req.query.name || '')+"" +
       "req.query.word:"+(req.query.word || '')+""+
       "req.query.job.st:"+(req.query.job.st || '')+"" +
       "req.param('name'):"+(req.param('name') || '')+"" ;
       

 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]" +
        "req.body:"+(JSON.stringify(req.body) || '')+"" +
        "req.body.name:"+(req.body.pName || '')+"" +
        "req.body.name:"+(req.body.pWord || '')+"";
  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')+"
"
  _html += "[Accept-Encoding] "+req.header('Accept-Encoding')+"
"
  _html += "[Accept-Language] "+req.header('Accept-Language')+"
"
  _html += "[Cache-Control] "+req.header('Cache-Control')+"
"
  _html += "[Connection] "+req.header('Connection')+"
"
  _html += "[Cookie] "+req.header('Cookie')+"
"
  _html += "[Host] "+req.header('Host')+"
"
  _html += "[If-None-Match] "+req.header('If-None-Match')+"
"
  _html += "[Upgrade-Insecure-Requests] "+req.header('Upgrade-Insecure-Requests')+"
"
  _html += "[User-Agent] "+req.header('User-Agent')+"
"
  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: "",
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

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

以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持创新互联!

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