{
  "name": "download.probe \u2014 a resumable ISO on a well-behaved server",
  "description": "Populates the File Info dialog. Establishes resumability from Accept-Ranges plus a validator.",
  "request": {
    "jsonrpc": "2.0",
    "id": 10,
    "method": "download.probe",
    "params": {
      "url": "https://releases.ubuntu.com/26.04/ubuntu-26.04-desktop-amd64.iso",
      "headers": {
        "User-Agent": "Velox/0.1"
      }
    }
  },
  "response": {
    "jsonrpc": "2.0",
    "id": 10,
    "result": {
      "filename": "ubuntu-26.04-desktop-amd64.iso",
      "sizeBytes": 6228541440,
      "mime": "application/octet-stream",
      "resumable": true,
      "effectiveUrl": "https://releases.ubuntu.com/26.04/ubuntu-26.04-desktop-amd64.iso",
      "suggestedCategoryId": "programs",
      "suggestedSaveDir": "/home/sami/Downloads/Programs",
      "etag": "\"5cf1a2b3-1730f4000\"",
      "lastModified": "Thu, 23 Apr 2026 10:14:52 GMT",
      "acceptRanges": true,
      "redirectChain": [],
      "requiresAuth": false
    }
  },
  "assertions": [
    "no task is created by a probe",
    "resumable is true only when Accept-Ranges: bytes AND a validator are both present",
    "the dialog opens before this returns; the RPC loop is never blocked on the network"
  ]
}