API ドキュメント

Node.js / Next.js proxy route

// app/api/media-proxy/route.js
const PLATFORM_HEADERS = {
  douyin: {
    Referer: 'https://www.douyin.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  tiktok: {
    Referer: 'https://www.tiktok.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  bilibili: {
    Referer: 'https://www.bilibili.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  xiaohongshu: {
    Referer: 'https://www.xiaohongshu.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  weibo: {
    Referer: 'https://weibo.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  youtube: {
    Referer: 'https://www.youtube.com/',
    Origin: 'https://www.youtube.com',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  instagram: {
    Referer: 'https://www.instagram.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  kuaishou: {
    Referer: 'https://www.kuaishou.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
  twitter: {
    Referer: 'https://x.com/',
    'User-Agent': 'Mozilla/5.0 AppleWebKit/537.36 Chrome/120 Safari/537.36',
  },
};

export async function GET(request) {
  const { searchParams } = new URL(request.url);
  const mediaUrl = searchParams.get('url');
  const platform = searchParams.get('platform');

  if (!mediaUrl || !platform || !PLATFORM_HEADERS[platform]) {
    return Response.json({ error: 'invalid_request' }, { status: 400 });
  }

  const range = request.headers.get('range');
  const headers = { ...PLATFORM_HEADERS[platform] };
  if (range) headers.Range = range;

  const mediaResponse = await fetch(mediaUrl, { headers });
  if (!mediaResponse.ok || !mediaResponse.body) {
    return Response.json(
      { error: 'download_failed', status: mediaResponse.status },
      { status: 502 }
    );
  }

  const responseHeaders = new Headers();
  const contentType = mediaResponse.headers.get('content-type');
  const contentLength = mediaResponse.headers.get('content-length');
  const contentRange = mediaResponse.headers.get('content-range');

  if (contentType) responseHeaders.set('Content-Type', contentType);
  if (contentLength) responseHeaders.set('Content-Length', contentLength);
  if (contentRange) responseHeaders.set('Content-Range', contentRange);
  responseHeaders.set('Accept-Ranges', 'bytes');
  responseHeaders.set('Cache-Control', 'private, max-age=300');

  return new Response(mediaResponse.body, {
    status: mediaResponse.status,
    headers: responseHeaders,
  });
}