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/]*>/i;\n \n let match;\n \n // Extract OpenGraph tags\n while ((match = ogRegex.exec(html)) !== null) {\n const property = match[1];\n const content = match[2];\n \n switch (property) {\n case 'title':\n ogData.title = content;\n break;\n case 'description':\n ogData.description = content;\n break;\n case 'image':\n ogData.image = content;\n break;\n case 'url':\n ogData.url = content;\n break;\n case 'site_name':\n ogData.siteName = content;\n break;\n case 'type':\n ogData.type = content;\n break;\n case 'locale':\n ogData.locale = content;\n break;\n case 'author':\n ogData.author = content;\n break;\n case 'article:published_time':\n ogData.publishedTime = content;\n break;\n case 'article:modified_time':\n ogData.modifiedTime = content;\n break;\n }\n }\n \n // Extract Twitter Card tags as fallback\n while ((match = twitterRegex.exec(html)) !== null) {\n const property = match[1];\n const content = match[2];\n \n switch (property) {\n case 'title':\n if (!ogData.title) ogData.title = content;\n break;\n case 'description':\n if (!ogData.description) ogData.description = content;\n break;\n case 'image':\n if (!ogData.image) ogData.image = content;\n break;\n }\n }\n \n // Fallback to HTML title and description\n if (!ogData.title) {\n const titleMatch = titleRegex.exec(html);\n if (titleMatch) ogData.title = titleMatch[1].trim();\n }\n \n if (!ogData.description) {\n const descMatch = descRegex.exec(html);\n if (descMatch) ogData.description = descMatch[1];\n }\n \n return ogData;\n}\n\n// Check if URL has any OpenGraph tags\nfunction hasOpenGraphTags(html: string): boolean {\n const ogRegex = / {\n try {\n const body: PreviewRequest = await c.req.json();\n const { url } = body;\n \n if (!url) {\n return c.json({\n success: false,\n error: \"URL is required\",\n hasOpenGraph: false,\n url: \"\"\n }, 400);\n }\n \n const normalizedUrl = normalizeUrl(url);\n \n // Validate URL format\n try {\n new URL(normalizedUrl);\n } catch {\n return c.json({\n success: false,\n error: \"Invalid URL format\",\n hasOpenGraph: false,\n url: normalizedUrl\n }, 400);\n }\n \n // Fetch the webpage\n const response = await fetch(normalizedUrl, {\n headers: {\n 'User-Agent': 'Mozilla/5.0 (compatible; OpenGraph-Preview-Bot/1.0)'\n }\n });\n \n if (!response.ok) {\n return c.json({\n success: false,\n error: `Failed to fetch URL: ${response.status} ${response.statusText}`,\n hasOpenGraph: false,\n url: normalizedUrl\n }, 400);\n }\n \n const html = await response.text();\n const ogData = extractOpenGraphData(html);\n const hasOG = hasOpenGraphTags(html);\n \n // Set the canonical URL if not present\n if (!ogData.url) {\n ogData.url = normalizedUrl;\n }\n \n return c.json({\n success: true,\n data: ogData,\n hasOpenGraph: hasOG,\n url: normalizedUrl\n });\n \n } catch (error) {\n console.error(\"Error fetching OpenGraph data:\", error);\n return c.json({\n success: false,\n error: error instanceof Error ? error.message : \"Unknown error occurred\",\n hasOpenGraph: false,\n url: \"\"\n }, 500);\n }\n});\n\nexport default app.fetch;","deleted","label",[170,153],"backend","permalink","https://www.val.town/x/hrbrmstr/og/code/backend/index.ts","extension","actionData","errors"]