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jq（命令行 JSON 处理器）合并来自 STDIN 的多个 JSON 字符串

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jq（命令行 JSON 处理器）合并来自 STDIN 的多个 JSON 字符串

我正在尝试使用 jq 命令合并来自 STDIN 的两个不同的 JSON 字符串（使用管道，而不是文件）。这是尝试的命令：

curl  ipinfo.io api.ipify.org/?format=json 2>/dev/null | jq -s

输出：

[
  {
    "ip": "139.162.244.103",
    "hostname": "businessproservices.com",
    "city": "London",
    "region": "England",
    "country": "GB",
    "loc": "51.5142,-0.0931",
    "postal": "EC2V",
    "org": "AS63949 Linode, LLC"
  },
  {
    "ip": "139.162.244.103"
  }
]

预期输出：

{
  "ip": "139.162.244.103",
  "hostname": "businessproservices.com",
  "city": "London",
  "region": "England",
  "country": "GB",
  "loc": "51.5142,-0.0931",
  "postal": "EC2V",
  "org": "AS63949 Linode, LLC"
}

答案1

您的curl命令查询两个主机。每个都会返回一个 JSON 文档。 jq -s会将它们添加在一起作为数组中的两个条目。要获取第一个条目（即您作为预期输出呈现的内容），只需从 请求first（或.[0]）jq，如

curl -s ipinfo.io 'api.ipify.org/?format=json' | jq -s 'first'

或者从一开始就使用第一个主机：

curl ipinfo.io

实际上合并这两个文档，将jq命令add应用于返回的列表：

curl -s ipinfo.io 'api.ipify.org/?format=json' | jq -s 'add'

请注意，由于 JSON 对象不能包含具有相同名称的多个键，因此任何后续键都将代替一个等效的早期密钥，这样如果您的jq -s文档是

[
  {
    "ip": "139.162.244.103",
    "hostname": "businessproservices.com",
    "city": "London",
    "region": "England",
    "country": "GB",
    "loc": "51.5142,-0.0931",
    "postal": "EC2V",
    "org": "AS63949 Linode, LLC"
  },
  {
    "ip": "39.62.44.1",
    "country": "UK"
  }
]

那么这将被合并为

{
  "ip": "39.62.44.1",
  "hostname": "businessproservices.com",
  "city": "London",
  "region": "England",
  "country": "UK",
  "loc": "51.5142,-0.0931",
  "postal": "EC2V",
  "org": "AS63949 Linode, LLC"
}

当使用jq -s add代替jq -s.

答案2

echo '
[
  {
    "ip": "139.162.244.103",
    "hostname": "businessproservices.com",
    "city": "London",
    "region": "England",
    "country": "GB",
    "loc": "51.5142,-0.0931",
    "postal": "EC2V",
    "org": "AS63949 Linode, LLC"
  },
  {
    "ip": "127.0.0.1",
    "country": "UK",
    "additional": "added Value"
  }
]' | jq  "add"

结果

{
  "ip": "127.0.0.1",
  "hostname": "businessproservices.com",
  "city": "London",
  "region": "England",
  "country": "UK",
  "loc": "51.5142,-0.0931",
  "postal": "EC2V",
  "org": "AS63949 Linode, LLC",
  "additional": "added Value"
}```

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