Here's an example of how to create a Next.js middleware matcher that targets URLs containing capital letters:
const matchCapitalLetters = (req, res, next) => {
if (/[A-Z]/.test(req.url)) {
// request URL contains capital letters
console.log('Matched a URL with capital letters:', req.url);
// your middleware logic here
} else {
// request URL doesn't contain capital letters
next();
}
}
export default matchCapitalLetters;
This middleware function uses a regular expression to test whether the requested URL contains any capital letters. If it does, the middleware logs a message and executes your custom logic. Otherwise, it passes the request to the next middleware in the chain using next()
.
To use this middleware in your Next.js application, simply import it and add it to your custom server.js
file as shown below:
const express = require('express');
const next = require('next');
const matchCapitalLetters = require('./matchCapitalLetters');
const dev = process.env.NODE_ENV !== 'production';
const app = next({ dev });
const handle = app.getRequestHandler();
app.prepare().then(() => {
const server = express();
server.use(matchCapitalLetters);
server.get('*', (req, res) => {
return handle(req, res);
});
server.listen(3000, (err) => {
if (err) throw err;
console.log('> Ready on http://localhost:3000');
});
});
Note that this middleware will only match URLs that contain at least one capital letter. To match all URLs that have a capital letter anywhere in the URL string, you could replace the regular expression with /[a-z].*[A-Z].*/
.
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Asked: 2021-08-09 11:00:00 +0000
Seen: 12 times
Last updated: Feb 07 '23