75 lines
3.0 KiB
TypeScript
75 lines
3.0 KiB
TypeScript
import express, { type Express } from "express";
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import fs from "fs";
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import path from "path";
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import { storage } from "./storage";
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function escapeHtml(str: string): string {
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return str.replace(/&/g, "&").replace(/"/g, """).replace(/</g, "<").replace(/>/g, ">");
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}
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function ogImageUrl(coverImage: string, baseUrl: string): string {
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if (!coverImage) return "";
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let imgPath = coverImage;
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if (imgPath.endsWith(".webp")) {
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imgPath = imgPath.replace(/\.webp$/, ".jpg");
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}
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return imgPath.startsWith("http") ? imgPath : `${baseUrl}${imgPath}`;
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}
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export function serveStatic(app: Express) {
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const distPath = path.resolve(__dirname, "public");
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if (!fs.existsSync(distPath)) {
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throw new Error(
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`Could not find the build directory: ${distPath}, make sure to build the client first`,
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);
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}
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app.use(express.static(distPath));
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app.use("/{*path}", async (req, res) => {
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const url = req.originalUrl;
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const indexPath = path.resolve(distPath, "index.html");
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const articleMatch = url.match(/^\/article\/([^?#]+)/);
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if (articleMatch) {
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try {
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const slug = decodeURIComponent(articleMatch[1]);
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const article = await storage.getArticleBySlug(slug);
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if (article) {
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const host = req.get("host") || "folx.tv";
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const protocol = req.get("x-forwarded-proto") || "https";
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const baseUrl = `${protocol}://${host}`;
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const articleUrl = `${baseUrl}/article/${article.slug}`;
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const imageUrl = ogImageUrl(article.coverImage || "", baseUrl);
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let template = await fs.promises.readFile(indexPath, "utf-8");
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const ogTags = [
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`<meta property="og:title" content="${escapeHtml(article.title)}" />`,
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`<meta property="og:description" content="${escapeHtml(article.excerpt)}" />`,
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`<meta property="og:type" content="article" />`,
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`<meta property="og:url" content="${escapeHtml(articleUrl)}" />`,
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`<meta property="og:image" content="${escapeHtml(imageUrl || `${baseUrl}/og-image.jpg`)}" />`,
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`<meta property="og:site_name" content="Folx Music Television" />`,
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`<meta name="twitter:card" content="summary_large_image" />`,
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`<meta name="twitter:title" content="${escapeHtml(article.title)}" />`,
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`<meta name="twitter:description" content="${escapeHtml(article.excerpt)}" />`,
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`<meta name="twitter:image" content="${escapeHtml(imageUrl || `${baseUrl}/og-image.jpg`)}" />`,
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`<meta name="description" content="${escapeHtml(article.excerpt)}" />`,
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`<title>${escapeHtml(article.title)} - Volksmusik & Schlager | Folx Music Television</title>`,
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].filter(Boolean).join("\n ");
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template = template.replace(/<meta property="og:[^"]*"[^>]*\/>\s*/g, "");
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template = template.replace(/<title>.*?<\/title>/, ogTags);
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res.status(200).set({ "Content-Type": "text/html" }).end(template);
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return;
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}
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} catch (e) {
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}
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}
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res.sendFile(indexPath);
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});
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}
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