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fix: search example to support Redis v4+ and Express 4/5 (#6274)

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* Fix Redis example to support Redis v4+ and Express 4/5

* update optional route syntax to /{:query} and refactor Redis initialization into dedicated function to guarantee that it is complete before server starts

---------

Co-authored-by: Sebastian Beltran <bjohansebas@gmail.com>
This commit is contained in:
Viny Brun Kriesang
2026-02-01 03:12:23 +00:00
committed by GitHub
parent 6b7ccfcf12
commit d12772393c
1 changed files with 42 additions and 20 deletions
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62
examples/search/index.js
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@@ -16,31 +16,47 @@ var path = require('node:path');
var redis = require('redis');
var db = redis.createClient();
// npm install redis
var app = express();
app.use(express.static(path.join(__dirname, 'public')));
// populate search
// npm install redis
db.sadd('ferret', 'tobi');
db.sadd('ferret', 'loki');
db.sadd('ferret', 'jane');
db.sadd('cat', 'manny');
db.sadd('cat', 'luna');
/**
* Redis Initialization
*/
async function initializeRedis() {
try {
// connect to Redis
await db.connect();
// populate search
await db.sAdd('ferret', 'tobi');
await db.sAdd('ferret', 'loki');
await db.sAdd('ferret', 'jane');
await db.sAdd('cat', 'manny');
await db.sAdd('cat', 'luna');
} catch (err) {
console.error('Error initializing Redis:', err);
process.exit(1);
}
}
/**
* GET search for :query.
*/
app.get('/search/:query?', function(req, res, next){
var query = req.params.query;
db.smembers(query, function(err, vals){
if (err) return next(err);
res.send(vals);
});
app.get('/search/{:query}', function (req, res, next) {
var query = req.params.query || '';
db.sMembers(query)
.then((vals) => res.send(vals))
.catch((err) => {
console.error(`Redis error for query "${query}":`, err);
next(err);
});
});
/**
@@ -54,8 +70,14 @@ app.get('/client.js', function(req, res){
res.sendFile(path.join(__dirname, 'client.js'));
});
/* istanbul ignore next */
if (!module.parent) {
app.listen(3000);
console.log('Express started on port 3000');
}
/**
* Start the Server
*/
(async () => {
await initializeRedis();
if (!module.parent) {
app.listen(3000);
console.log('Express started on port 3000');
}
})();