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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) {
})
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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);
});
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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
</div>
Post
post的数据获取
Form Data pName:zqz pWord:job</div>
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);
})
</div>
结果:
[Post]
req.body:{"pName":"zqz","pWord":"job"}
req.body.name:zqz
req.body.name:job
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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
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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
}
}
</div>
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"
}
</div>
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
</div>
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
</div>
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
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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
</div>
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
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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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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!
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