shortner app

JavaScript/shortner/index.js

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+// Import required modules
+const express = require('express');
+const shortid = require('shortid');
+const app = express();
+const port = 3000;
+
+// In-memory storage for URLs
+const urlDatabase = {};
+
+// Middleware to parse JSON requests
+app.use(express.json());
+
+// Endpoint to create a short URL
+app.post('/shorten', (req, res) => {
+    const originalUrl = req.body.url;
+
+    // Validate if URL is provided
+    if (!originalUrl) {
+        return res.status(400).json({ error: 'URL is required' });
+    }
+
+    // Generate a unique short ID
+    const shortUrl = shortid.generate();
+
+    // Store the original URL with the short URL as key
+    urlDatabase[shortUrl] = originalUrl;
+
+    // Return the short URL
+    res.json({ originalUrl, shortUrl: `http://localhost:${port}/${shortUrl}` });
+});
+
+// Endpoint to redirect to the original URL
+app.get('/:shortUrl', (req, res) => {
+    const shortUrl = req.params.shortUrl;
+
+    // Look up the original URL
+    const originalUrl = urlDatabase[shortUrl];
+
+    if (!originalUrl) {
+        return res.status(404).json({ error: 'URL not found' });
+    }
+
+    // Redirect to the original URL
+    res.redirect(originalUrl);
+});
+
+// Start the server
+app.listen(port, () => {
+    console.log(`URL shortener app listening at http://localhost:${port}`);
+});

JavaScript/shortner/package.json

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+{
+  "name": "nodejs",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start":"node index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.19.2",
+    "shortid":"^4.19.0"
+  }
+}