Question

我有以下JSON文件：

{
  "error": 0,
  "data": {
    "0": {
      "orderid": "40007600",
      "price": "9.99",
      "listingname": "iPhone 8",
      "smallphoto": "https://images-eu.ssl-images-amazon.com/images/I/51b5iaLTjgL._SL160_.jpg",
      "photo": "https://images-eu.ssl-images-amazon.com/images/I/51b5iaLTjgL.jpg"
    },
    "1": {
      "orderid": "40007598",
      "price": "9.99",
      "listingname": "iPhone 8 Plus",
      "smallphoto": "https://images-eu.ssl-images-amazon.com/images/I/51CVLqsSNkL._SL160_.jpg",
      "photo": "https://images-eu.ssl-images-amazon.com/images/I/51CVLqsSNkL.jpg"
    },
    "4": {
      "orderid": "40007595",
      "price": "9.39",
      "listingname": "Nadelflaschen",
      "smallphoto": "https://images-eu.ssl-images-amazon.com/images/I/41OHDP2rAeL._SL160_.jpg",
      "photo": "https://images-eu.ssl-images-amazon.com/images/I/41OHDP2rAeL.jpg"
    },
  }
}

如何使用bash脚本过滤所有内容，以便获得＆＃34; smallphoto＆＃34;的所有图像网址。进入文本文件？

f.e。来自＆＃34; Nadelflaschen＆＃34;

的https://images-eu.ssl-images-amazon.com/images/I/41OHDP2rAeL.SL160.jpg

我尝试了awk和jq命令。但我只是要转储以了解jq语法。

awk是可能的，但是我只使用反斜杠的未过滤链接，这不起作用。

Answer 1

jq '.data[] | .smallphoto' input.json

的产率：

"https://images-eu.ssl-images-amazon.com/images/I/51b5iaLTjgL._SL160_.jpg"
"https://images-eu.ssl-images-amazon.com/images/I/51CVLqsSNkL._SL160_.jpg"
"https://images-eu.ssl-images-amazon.com/images/I/41OHDP2rAeL._SL160_.jpg"

这里的关键点是.[]（.data[]是.data|.[]的缩写形式）可以与JSON对象一起使用，而不仅仅是数组。

Answer 2

这是另一个过滤器，无论嵌套有多深，都会找到.smallphoto：

.. | .smallphoto?//empty

Try it online!

样本运行（假设data.json中的更正样本数据）

$ jq -M '.. | .smallphoto?//empty' data.json
"https://images-eu.ssl-images-amazon.com/images/I/51b5iaLTjgL._SL160_.jpg"
"https://images-eu.ssl-images-amazon.com/images/I/51CVLqsSNkL._SL160_.jpg"
"https://images-eu.ssl-images-amazon.com/images/I/41OHDP2rAeL._SL160_.jpg"

用于过滤JSON文本的Bash脚本

2 个答案: