为什么用 jq returns null 解析?

why parsing with jq returns null?

我正在尝试使用 jq 工具从我的 json 文件中提取 3 个字段(状态、ID、名称)的值,这是我的 json:

猫parse.json

{
  "stream": {
    "_id": 65675798730520654496,
    "broadcast_platform": "live",
    "community_id": "",
    "community_ids": [],
    "average_fps": 60.0247524752,
    "delay": 0,
    "created_at": "2018-09-26T07:25:38Z",
    "is_playlist": false,
    "stream_type": "live",
    "preview": {
      "small": "https://static-cdn.jtvnw.net/previews-ttv/live_user_versuta-80x4512wdfqf.jpg",
    },
    "channel": {
      "mature": true,
      "status": "status",
      "broadcaster_language": "ru",
      "broadcaster_software": "",
      "_id": 218025408945123423423445,
      "name": "djvbsdhvsdvasdv",
      "created_at": "2011-04-17T17:31:36.091604Z",
      "updated_at": "2018-09-26T09:49:04.434245Z",
      "partner": true,
      "video_banner": null,
      "profile_banner": "https://static-cdn.jtvnw.net/jtv_user_pictures/25c2bec3-95b8-4347-aba0-128b3b913b0d-profile_banner-480.png",
      "profile_banner_background_color": "",
      "views": 103911737,
      "followers": 446198,
      "broadcaster_type": "",
      "description": "",
      "private_video": false,
      "privacy_options_enabled": false
    }
  }
}

在线 json 验证者说它是有效的,当我尝试获取一些字段时 return null

猫parse.json | jq '.channel'

null

猫parse.json | jq'.channel.status'

null

伙计们,我做错了什么?

您的 JSON 对象有一个顶级字段 "stream" 您需要访问 "stream" 才能访问其他子属性,例如channel:

jq '.stream.channel.status' parse.json

你也可以cat parse.json | jq '.stream.channel.status'.

您的示例 JSON 也无效,因为 stream.preview.small 属性 有尾随逗号。不过,只需删除该逗号即可使其有效。

要处理无效的 JSON,您可以使用 JSON 整流器,例如 hjson;为了避免与识别相关路径相关的任何麻烦,您可以使用 ..|objects。例如:

$ hjson -j parse.json | jq '..|objects|select(.status) | .status, ._id, .name'
"status"
218025408945123440000000
"djvbsdhvsdvasdv"