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"+
"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
FormData 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(WindowsNT6.1;WOW64)AppleWebKit/537.36(KHTML,likeGecko)Chrome/54.0.2840.99Safari/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
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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