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titleMatch[1].trim()\n : urlToTitle(url);\n\n if (title.length < 5) continue;\n\n articles.push({\n title: escapeXml(title),\n url,\n category: escapeXml(capitalize(category)),\n });\n }\n\n return articles;\n}\n\nfunction urlToTitle(url: string): string {\n const slug = url.split(\"/\").pop() || \"\";\n return slug\n .replace(/-/g, \" \")\n .replace(/\\b\\w/g, (c) => c.toUpperCase());\n}\n\nfunction capitalize(s: string): string {\n return s.charAt(0).toUpperCase() + s.slice(1);\n}\n\nfunction escapeXml(str: string): string {\n return str\n .replace(/&/g, \"&\")\n .replace(//g, \">\")\n .replace(/\"/g, \""\")\n .replace(/'/g, \"'\");\n}\n\nfunction buildRSS(articles: Article[]): string {\n const now = new Date().toUTCString();\n\n const items = articles\n .map(\n (a) => `\n \n ${a.title}\n ${a.url}\n ${a.url}\n ${a.category}\n ${now}\n `,\n )\n .join(\"\\n\");\n\n return `\n\n \n National Geographic - Latest Stories\n ${NATGEO_URL}\n Latest stories from National Geographic\n en-us\n ${now}\n \n ${items}\n \n`;\n}\n\nexport default async function handler(req: Request): Promise {\n try {\n const articles = await scrapeNatGeo();\n\n if (articles.length === 0) {\n return new Response(\"No articles found\", { status: 500 });\n }\n\n const rss = buildRSS(articles);\n\n return new Response(rss, {\n headers: {\n \"Content-Type\": \"application/rss+xml; charset=utf-8\",\n \"Cache-Control\": \"public, max-age=900\", // cache for 15 minutes\n },\n });\n } catch (err) {\n const message = err instanceof Error ? 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Diff · v2