{
  "chunk": 262144,
  "etag": "\"f8f43e7a15dab458\"",
  "md5_whole": "8b78420c8ae7cee41a0a843f2d8df93e",
  "note": "用 curl -H 'Range: bytes=a-b' 下载后 md5sum，与上面的 md5 对比即可判断分片是否正确",
  "seed": "range",
  "segments": [
    {
      "length": 262144,
      "md5": "a13bd8cf26b05e90cb0338b7a7cd9304",
      "range": "bytes=0-262143",
      "verify_expr": "md5sum | cut -c1-32 期望 a13bd8cf26b05e90cb0338b7a7cd9304"
    },
    {
      "length": 262144,
      "md5": "22ed7009efea1ce7ca784fd9c486a4ae",
      "range": "bytes=262144-524287",
      "verify_expr": "md5sum | cut -c1-32 期望 22ed7009efea1ce7ca784fd9c486a4ae"
    },
    {
      "length": 262144,
      "md5": "8c902d35abb5ff5d4aac2766fb6f6e1d",
      "range": "bytes=524288-786431",
      "verify_expr": "md5sum | cut -c1-32 期望 8c902d35abb5ff5d4aac2766fb6f6e1d"
    },
    {
      "length": 262144,
      "md5": "36d3adf1bd48ebdfd7548da863ed3db4",
      "range": "bytes=786432-1048575",
      "verify_expr": "md5sum | cut -c1-32 期望 36d3adf1bd48ebdfd7548da863ed3db4"
    }
  ],
  "size": 1048576
}