How to check if a page exist in a custom server using Next.js
I finally solved with:
const glob = require('glob')const path = require('path')// ...const pagesDir = path.resolve(`${__dirname}/../src/pages`)const pages = glob.sync(`${pagesDir}/**/*.js`) .map(p => p .replace(pagesDir, '') .replace('index.js', '') .replace('.js', '') )// ...server.get('*',(req, res) => { const { url, fixed } = fixUrl(req) if (fixed && pages.includes(url.split('?')[0])) { res.redirect(301, url) return } handle(req, res)})If somebody knows a more elegant solution it will be welcome.
This terrible hack doesn't strictly tell you whether a route exists before calling handle, but it does let you hook in and apply your own custom handling of 404 errors before next renders anything to the res.
const errorRenderer = app.server.renderErrorToHTML;app.server.renderErrorToHTML = function(err, req, res, pathname, query) { if (res.statusCode == 404) { // handle the 404 however you like return null; } else { return errorRenderer.apply(this, arguments); }};