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error.message : String(error),\n },\n 500,\n );\n }\n}\n\nfunction parseInput(\n input: string,\n): {\n id: string;\n resourceKey: string | null;\n} | null {\n input = String(input || \"\").trim();\n\n if (/^[a-z0-9_-]{10,}$/i.test(input)) {\n return {\n id: input,\n resourceKey: null,\n };\n }\n\n try {\n const url = new URL(input);\n\n const allowedHosts = [\n \"drive.google.com\",\n \"drive.usercontent.google.com\",\n ];\n\n if (!allowedHosts.includes(url.hostname)) {\n return null;\n }\n\n const pathMatch = url.pathname.match(\n /\\/file\\/d\\/([a-z0-9_-]+)/i,\n );\n\n const id = pathMatch?.[1] ||\n url.searchParams.get(\"id\");\n\n if (!id) return null;\n\n return {\n id,\n resourceKey: url.searchParams.get(\"resourcekey\"),\n };\n } catch {\n return null;\n }\n}\n\nfunction getFilename(\n disposition: string,\n): string | null {\n const utf8Match = disposition.match(\n /filename\\*\\s*=\\s*UTF-8''([^;]+)/i,\n );\n\n if (utf8Match) {\n try {\n return decodeURIComponent(\n utf8Match[1].trim(),\n );\n } catch {\n return utf8Match[1].trim();\n }\n }\n\n const normalMatch = disposition.match(\n /filename\\s*=\\s*[\"']?([^\"';]+)[\"']?/i,\n );\n\n return normalMatch ? normalMatch[1].trim() : null;\n}\n\nfunction getTotalBytes(\n headers: Headers,\n): number | null {\n const contentRange = headers.get(\"content-range\");\n\n const rangeMatch = contentRange?.match(\n /\\/(\\d+)$/,\n );\n\n if (rangeMatch) {\n return Number(rangeMatch[1]);\n }\n\n const contentLength = headers.get(\"content-length\");\n\n return contentLength ? Number(contentLength) : null;\n}\n\nfunction formatBytes(bytes: number): string {\n if (bytes === 0) return \"0 B\";\n\n const units = [\n \"B\",\n \"KB\",\n \"MB\",\n \"GB\",\n \"TB\",\n ];\n\n const index = Math.min(\n Math.floor(Math.log(bytes) / Math.log(1024)),\n units.length - 1,\n );\n\n const value = bytes / Math.pow(1024, index);\n\n return (\n (index === 0 ? value.toFixed(0) : value.toFixed(2)) +\n \" \" +\n units[index]\n );\n}\n\nfunction matchText(\n html: string,\n regex: RegExp,\n): string | null {\n const match = html.match(regex);\n\n if (!match) return null;\n\n return match[1]\n .replace(/<[^>]+>/g, \" \")\n .replace(/&/gi, \"&\")\n .replace(/"/gi, '\"')\n .replace(/'/gi, \"'\")\n .replace(/\\s+/g, \" \")\n .trim();\n}","/**\n * Google Drive File Info — Val.town\n *\n * ผลลัพธ์:\n * { statusCode, filename, size }\n *\n * size มีหน่วยเป็นไบต์\n */\n\nconst UA = \"Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/138.0\";\n\nexport default async function (request: Request): Promise {\n const json = (data: unknown, status = 200) =>\n new Response(JSON.stringify(data, null, 2), {\n status,\n headers: {\n \"content-type\": \"application/json; charset=utf-8\",\n \"access-control-allow-origin\": \"*\",\n },\n });\n\n try {\n const url = new URL(request.url);\n const input = url.searchParams.get(\"link\") ||\n url.searchParams.get(\"url\") ||\n url.searchParams.get(\"id\") ||\n \"\";\n\n const file = parseDriveInput(input);\n\n if (!file) {\n return json({\n statusCode: 400,\n message: \"Invalid Google Drive URL or file ID\",\n }, 400);\n }\n\n const params = new URLSearchParams({\n id: file.id,\n export: \"download\",\n });\n\n if (file.resourceKey) {\n params.set(\"resourcekey\", file.resourceKey);\n }\n\n const response = await fetch(\n \"https://drive.usercontent.google.com/download?\" + params,\n {\n redirect: \"follow\",\n headers: {\n \"User-Agent\": UA,\n \"Range\": \"bytes=0-0\",\n },\n },\n );\n\n const disposition = response.headers.get(\"content-disposition\") || \"\";\n\n const contentRange = response.headers.get(\"content-range\") || \"\";\n\n const contentLength = response.headers.get(\"content-length\");\n\n const contentType = response.headers.get(\"content-type\") || \"\";\n\n await response.body?.cancel();\n\n if (\n !response.ok ||\n contentType.includes(\"text/html\")\n ) {\n return json({\n statusCode: response.status || 404,\n message:\n \"File is private, download is disabled, or file is unavailable\",\n }, response.status >= 400 ? response.status : 404);\n }\n\n const filename = getFilename(disposition);\n\n // ขนาดจริงอยู่หลังเครื่องหมาย / ใน Content-Range\n const rangeMatch = contentRange.match(/\\/(\\d+)$/);\n\n const size = rangeMatch\n ? 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Diff · v4