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Enhance SEO meta tag handling in generateHTML function by adding support for reading built index.html, updating existing tags, and implementing fallback logic for missing files.

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Torsten Schulz (local)
2025-12-05 08:03:20 +01:00
parent b6eef5100f
commit 2ee52523ff
3 changed files with 71 additions and 32 deletions
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103
server/routes-seo.js
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@@ -1,4 +1,4 @@
import { readFileSync } from 'fs';
import { readFileSync, existsSync } from 'fs';
import { join } from 'path';
// SEO-Meta-Daten für verschiedene Routen
@@ -26,43 +26,62 @@ const seoData = {
};
// HTML-Template für Pre-Rendering
function generateHTML(route, meta) {
const baseHTML = `<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
function generateHTML(route, meta, __dirname) {
// Versuche, die gebaute index.html zu lesen
const distIndexPath = join(__dirname, '../docroot/dist/index.html');
let baseHTML;
<!-- SEO Meta Tags -->
<title>${meta.title}</title>
<meta name="description" content="${meta.description}">
<meta name="keywords" content="${meta.keywords}">
<meta name="robots" content="index, follow">
<!-- Open Graph Tags -->
if (existsSync(distIndexPath)) {
// Verwende die gebaute index.html (mit korrekten Asset-Pfaden von Vite)
baseHTML = readFileSync(distIndexPath, 'utf-8');
// Ersetze Meta-Tags in der gebauten HTML
baseHTML = baseHTML.replace(/<title>.*?<\/title>/, `<title>${meta.title}</title>`);
// Ersetze oder füge description hinzu
if (baseHTML.includes('<meta name="description"')) {
baseHTML = baseHTML.replace(/<meta name="description"[^>]*>/, `<meta name="description" content="${meta.description}">`);
} else {
baseHTML = baseHTML.replace('</head>', ` <meta name="description" content="${meta.description}">\n</head>`);
}
// Ersetze oder füge keywords hinzu
if (baseHTML.includes('<meta name="keywords"')) {
baseHTML = baseHTML.replace(/<meta name="keywords"[^>]*>/, `<meta name="keywords" content="${meta.keywords}">`);
} else {
baseHTML = baseHTML.replace('</head>', ` <meta name="keywords" content="${meta.keywords}">\n</head>`);
}
// Ersetze oder füge Open Graph Tags hinzu
const ogTags = `
<meta property="og:title" content="${meta.ogTitle}">
<meta property="og:description" content="${meta.ogDescription}">
<meta property="og:type" content="${meta.ogType}">
<meta property="og:url" content="${meta.ogUrl}">
<meta property="og:image" content="${meta.ogImage}">
<!-- Twitter Card -->
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="${meta.ogTitle}">
<meta name="twitter:description" content="${meta.ogDescription}">
<meta name="twitter:image" content="${meta.ogImage}">
<!-- Canonical URL -->
<link rel="canonical" href="${meta.ogUrl}">
<!-- Favicon -->
<link rel="icon" type="image/png" href="/static/favicon.png">
</head>
<body>
<div id="app"></div>
<script type="module" src="/src/main.js"></script>
</body>
</html>`;
<link rel="canonical" href="${meta.ogUrl}">`;
// Entferne alte OG/Twitter/Canonical Tags falls vorhanden
baseHTML = baseHTML.replace(/<meta property="og:[^>]*>/g, '');
baseHTML = baseHTML.replace(/<meta name="twitter:[^>]*>/g, '');
baseHTML = baseHTML.replace(/<link rel="canonical"[^>]*>/g, '');
// Füge neue Tags vor </head> ein
baseHTML = baseHTML.replace('</head>', `${ogTags}\n</head>`);
// Füge robots meta hinzu falls nicht vorhanden
if (!baseHTML.includes('<meta name="robots"')) {
baseHTML = baseHTML.replace('</head>', ` <meta name="robots" content="index, follow">\n</head>`);
}
} else {
// Fallback: Gebaute index.html nicht gefunden - verwende SPA-Fallback
console.error('WARNUNG: Gebaute index.html nicht gefunden:', distIndexPath);
return null;
}
return baseHTML;
}
@@ -76,15 +95,35 @@ export function setupSEORoutes(app, __dirname) {
// Pre-Rendering für Hauptseite
app.get('/', (req, res) => {
const meta = seoData['/'];
const html = generateHTML('/', meta);
res.send(html);
const html = generateHTML('/', meta, __dirname);
if (html) {
res.send(html);
} else {
// Fallback: Verwende die gebaute index.html direkt (ohne Meta-Tag-Anpassung)
const distIndexPath = join(__dirname, '../docroot/dist/index.html');
if (existsSync(distIndexPath)) {
res.sendFile(distIndexPath);
} else {
res.status(500).send('Gebaute index.html nicht gefunden. Bitte führe "npm run build" aus.');
}
}
});
// Pre-Rendering für Partners-Seite
app.get('/partners', (req, res) => {
const meta = seoData['/partners'];
const html = generateHTML('/partners', meta);
res.send(html);
const html = generateHTML('/partners', meta, __dirname);
if (html) {
res.send(html);
} else {
// Fallback: Verwende die gebaute index.html direkt (ohne Meta-Tag-Anpassung)
const distIndexPath = join(__dirname, '../docroot/dist/index.html');
if (existsSync(distIndexPath)) {
res.sendFile(distIndexPath);
} else {
res.status(500).send('Gebaute index.html nicht gefunden. Bitte führe "npm run build" aus.');
}
}
});
}