Router([options])
let router = express.Router([options]);
-
options
对象
-
caseSensitive
,大小写敏感,默认不敏感
-
mergeParams
,保留父路由器的必需参数值,如果父项和子项具有冲突的参数名称,则该子项的值将优先
-
strict
,激活严格路由,默认禁用,禁用之后/uu
正常访问,但是/uu/
不可以访问
1. router.all
- 全部调用
router.all(path, [callback, ...] callback)
router.all('*', fn1, fn2...);
// 或者
router.all('*', fn1);
router.all('*', fn2);
// 或者
router.all('/user', fn3);
2. router.METHOD
router.METHOD(path, [callback, ...] callback)
- 实际上就是
ajax
的各种请求方法
router.get('/', (req, res, next) => {
})
router.post('/', (req, res, next) => {
})
3. router.route(path)
var router = express.Router();
router.param('user_id', function(req, res, next, id) {
// sample user, would actually fetch from DB, etc...
req.user = {
id: id,
name: 'TJ'
};
next();
});
router.route('/users/:user_id')
.all(function(req, res, next) {
// runs for all HTTP verbs first
// think of it as route specific middleware!
next();
})
.get(function(req, res, next) {
res.json(req.user);
})
.put(function(req, res, next) {
// just an example of maybe updating the user
req.user.name = req.params.name;
// save user ... etc
res.json(req.user);
})
.post(function(req, res, next) {
next(new Error('not implemented'));
})
.delete(function(req, res, next) {
next(new Error('not implemented'));
})
4. router.use
4.1 使用路由
var express = require('express');
var app = express();
var router = express.Router();
// simple logger for this router's requests
// all requests to this router will first hit this middleware
router.use(function(req, res, next) {
console.log('%s %s %s', req.method, req.url, req.path);
next();
});
// this will only be invoked if the path starts with /bar from the mount point
router.use('/bar', function(req, res, next) {
// ... maybe some additional /bar logging ...
next();
});
// always invoked
router.use(function(req, res, next) {
res.send('Hello World');
});
app.use('/foo', router);
app.listen(3000);
4.2 使用模块方法
var logger = require('morgan');
router.use(logger());
router.use(express.static(__dirname + '/public'));
router.use(function(req, res){
res.send('Hello');
});
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