Function GET

api/proxy-file.js:1–86

(request)

export async function GET(request) {
  return new Response("Vercel function file tunneling is currently disabled, due to quota limits.", {
    status: 409
  });

  try {
    // Get the file URL from query parameters
    const { searchParams } = new URL(request.url);
    const fileUrl = searchParams.get("url");

    if (!fileUrl) {
      return new Response("Missing file URL parameter", {
        status: 400
      });
    }

    // Validate URL format
    let parsedUrl;
    try {
      parsedUrl = new URL(fileUrl);
    } catch {
      return new Response("Invalid URL format", {
        status: 400
      });
    }

    // Fetch the file from the provided URL
    const response = await fetch(fileUrl);

    if (!response.ok) {
      return new Response(`Failed to fetch file: ${response.statusText}`, {
        status: response.status
      });
    }

    // Extract filename from URL or content-disposition header
    const contentDisposition = response.headers.get("content-disposition");
    let filename = fileUrl.split("/").pop(); // Default to last segment of URL

    if (contentDisposition) {
      const filenameMatch = contentDisposition.match(
        /filename[^;=\n]*=(['"]*)(.*?)\1/
      );
      if (filenameMatch && filenameMatch[2]) {
        filename = filenameMatch[2];
      }
    } else {
      // Try to extract filename from URL path
      const lastSegment = parsedUrl.pathname.split("/").pop();
      if (lastSegment && lastSegment.includes(".")) {
        filename = lastSegment;
      }
    }

    // Get content type from the original response
    const contentType =
      response.headers.get("content-type") || "application/octet-stream";
    const contentLength = response.headers.get("content-length");

    // Create headers for file download