{
  "message": "Cloudflare Worker - file stream upload only",
  "api": {
    "name": "文件流上传到 R2",
    "path": "/api/file-stream-upload",
    "methods": [
      "GET",
      "POST",
      "OPTIONS"
    ],
    "description": "通过 multipart/form-data 文件流上传到 Cloudflare R2。"
  }
}