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when I execute a normal curl via a shell script functioniert es.

This work:

curl -s -v -X POST --data '{
    "zoneConfig": {
        "userID": "'$userid'",
        "name": "'$myName'",
        "id":"'$id'"
    },
    "delete": [
        {
            "id": "ID1"
        },
        {
            "id": "ID2"
        }
    ]
}' https://urlToAPI

But as soon as I put "delete" in a variable I get an undefined error from the API vendor

This is not working

delete='{
    "id": "ID1"
},
{
    "id": "ID2"
}'

curl -s -v -X POST --data '{
    "zoneConfig": {
        "userID": "'$userid'",
        "name": "'$myName'",
        "id":"'$id'"
    },
    "delete": [
        '$deleteValues'
    ]
}' https://urlToAPI

But I don't understand the difference as both configurations are the same?

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7
  • add -trace-ascii dump.txt to the command line and check that file after you've run your command... Commented Sep 5, 2020 at 19:40
  • I get "== Info: Could not resolve host: "200905shwpkzwvw4coy"" Commented Sep 5, 2020 at 19:56
  • ... which hints that you somehow got the argument to --data wrong (quote issues?) so that curl interpreted that sequence as the URL instead of post content. Commented Sep 5, 2020 at 20:33
  • and please drop -X POST it makes my head hurt. Commented Sep 5, 2020 at 20:34
  • @Daniel Stenberg Thank you. But what is beter? When i search on stackoverflow I find many examples woth this Commented Sep 5, 2020 at 21:04

1 Answer 1

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1

When interpolating, the value is split on whitespace.[1]

As such,

a='a b c'
prog $a

is equivalent to

prog 'a' 'b' 'c'

This splitting doesn't occur if the interpolation occurs inside of double-quotes.

As such,

a='a b c'
prog "$a"

is equivalent to

prog 'a b c'

Therefore, you need to change

$deleteValues

to

"$deleteValues"
  1. To be precise, the IFS env var controls how the value is split. It's normally set such that splitting occurs on spaces, tabs and line feeds.
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