假设我有两条路线,一条带有参数,一条没有:
我想对这两条路线使用两个不同的处理程序。我知道我可以做这样的事情。
app.use('/foo', (req, res) => {
if (req.params.foo !== undefined) {
// do something
} else {
// do something else
}
})
但是,这会使代码更难阅读。有没有办法匹配具有参数的路线?我想处理这种情况:
app.use('/foo', x);
app.use('/foo?bar', y);
答案 0 :(得分:1)
据我所知,查询无法在use
处理程序中进行过滤。
相反,我使用next
得出了非常相似的情况。
app.use('/foo', (req, res, next) => {
if (req.query.foo !== undefined) return next();
//if foo is undefined, it will look for other matching route which will probably the next '/foo' route
/* things to do with foo */
});
app.use('/foo', (req, res) => {
//things to without foo
});
https://expressjs.com/en/guide/using-middleware.html 该文档也可能对您有帮助
答案 1 :(得分:0)
怎么样?
const express = require('express');
const app = express();
// curl -X GET http://localhost:3000/foo
app.get('/foo', function (req, res, next) {
res.send('This is foo');
});
// curl -X GET http://localhost:3000/foo/bar
app.get('/foo/:?bar', function (req, res, next) {
res.send('This is foo with bar');
});
app.listen(3000);