将不带尾随斜杠的URL重定向到带尾随斜杠的URL

server {
    listen 80;
    server_name example.com;

    location / {
        try_files $uri $uri/ =404;
    }

    location ~ ^/(.+)/$ {
        rewrite ^(.+)/$ $1 permanent;
    }
}

RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} !/$
RewriteRule ^(.*)$ $1/ [L,R=301]

const express = require('express');
const app = express();

app.use((req, res, next) => {
    if (!req.url.endsWith('/')) {
        return res.redirect(301, req.url + '/');
    }
    next();
});

app.get('/', (req, res) => {
    res.send('Hello World!');
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

<?php
$url = $_SERVER['REQUEST_URI'];
if (substr($url, -1) !== '/') {
    header('Location: ' . $url . '/', true, 301);
    exit();
}
?>

from flask import Flask, redirect, request

app = Flask(__name__)

@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def index(path):
    if not path.endswith('/'):
        return redirect(request.path + '/', code=301)
    return 'Hello World!'

if __name__ == '__main__':
    app.run(port=3000)