add dynamic seo settings

server.js

@@ -4,6 +4,7 @@ const path = require('path');
 const express = require('express');
 const helmet = require('helmet');
 const winston = require('winston');
+const ejs = require('ejs');
 
 const DocumentHandler = require('./lib/document_handler.js');
 const FileStorage = require('./lib/file_storage.js');
@@ -37,25 +38,6 @@ logger.info('Welcome to unknownBIN!');
 // init file-storage
 const fileStorage = new FileStorage({ path: config.dataPath, logger: logger });
 
-// load static documents into file-storage
-if (config.documents) {
-    for (const name in config.documents) {
-        const docPath = config.documents[name];
-        try {
-            const data = fs.readFileSync(docPath, 'utf8');
-            fileStorage.set(name, data, (success) => {
-                if (success) {
-                    logger.verbose(`Loaded document: ${name} from ${docPath}`);
-                } else {
-                    logger.warn(`Failed to store document: ${name}`);
-                }
-            });
-        } catch (err) {
-            logger.warn(`Unable to find or read document: ${name} at ${docPath}`);
-        }
-    }
-}
-
 // configure the document handler
 const documentHandler = new DocumentHandler({
     store: fileStorage,
@@ -68,9 +50,14 @@ const documentHandler = new DocumentHandler({
 // setup routes and request-handling
 const app = express();
 
+// Configure EJS as the view engine
+app.set('view engine', 'ejs');
+app.set('views', path.join(__dirname, 'views'));
+
 // Use helmet for basic security headers
 app.use(helmet());
 
+// API routes
 app.get('/raw/:id', (req, res) => {
     return documentHandler.handleRawGet(req.params.id, res);
 });
@@ -81,17 +68,47 @@ app.get('/documents/:id', (req, res) => {
     return documentHandler.handleGet(req.params.id, res);
 });
 
+// Static files
 app.use(express.static(path.join(__dirname, 'static')));
 
-app.get('/:id', (req, res, next) => {
-    res.sendFile(path.join(__dirname, '/static/index.html'));
+// Frontend routes (SSR)
+app.get('/:id', (req, res) => {
+    const key = req.params.id;
+    
+    // Don't treat static files as paste IDs
+    if (key.includes('.')) {
+        return res.status(404).send('Not Found');
+    }
+
+    fileStorage.get(key, (data) => {
+        if (data) {
+            // Paste found, render it with dynamic SEO tags
+            const title = `Paste ${key} - unknownBIN`;
+            const description = data.substring(0, 160).replace(/\n/g, ' ');
+            res.render('index', {
+                paste: {
+                    key: key,
+                    data: data,
+                    title: title,
+                    description: description
+                }
+            });
+        } else {
+            // Paste not found, render the homepage
+            res.render('index', {
+                paste: null
+            });
+        }
+    });
 });
 
-app.get('/', (req, res, next) => {
-    res.sendFile(path.join(__dirname, '/static/index.html'));
+app.get('/', (req, res) => {
+    // Render the homepage
+    res.render('index', {
+        paste: null
+    });
 });
 
-
 app.listen(config.port, config.host, () => {
     logger.info(`Listening on ${config.host}:${config.port}`);
 });