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Json – Dynamically inject variable into the data parameter of a curl statement

Given the –data parameter of a curl statement:

--data '{
    "collection": [
        "Library"
    ],
    "filter": "{'''target.endpointUID''':{'''$eq''': '''ABC123'''}}",
    "skip": 0,
    "limit": 16
}'

I’d like to replace ABC123 with the variable I want to use but I cannot figure out the correct way.

Tags:

2

Answers


  1. 0

    You can use here-document (this assumes you don’t have special characters like double quotes in $var):

    var=ABC123
curl ... --data "$(cat << EOF
{
    "collection": [
        "Library"
    ],
    "filter": "{'target.endpointUID':{'$eq': '$var'}}",
    "skip": 0,
    "limit": 16
}
EOF
)" ...
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  2. 0

    You want

    data=$(
  jq -nc --arg uid "${your_variable}" '
    {
      "collection": ["Library"],
      "filter": "{"target.endpointUID":{"$eq": "($uid)"}}",
      "skip": 0,
      "limit": 16
    }
  '
)

curl --data "$data" ...

    or, a bit clearer

    data=$(
  jq -nc --arg uid "${your_variable}" '
    {"target.endpointUID": {"$eq": $uid}} as $filter
    | {collection: ["Library"], filter: ($filter | tojson), skip: 0, limit: 16}
  '
)
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